CN216398121U - Crank throw eccentric hole drill processing clamp - Google Patents

Abstract

In order to solve the problems of long processing time, unstable processing quality, serious production waste and the like existing in the crank throw eccentric hole drilling processing method in the prior art, the utility model provides a crank throw eccentric hole drilling processing clamp, which comprises a bottom plate, a base, a positioning mechanism and a pressing and clamping mechanism; the bottom plate is rectangular; the base is circular and is arranged in the middle of the bottom plate, and a curved rod through hole is formed in the center of the circular base; the diameter of the crank through hole is matched with that of the crank; the positioning mechanism is arranged on the left side of the bottom plate and comprises a positioning fork and a positioning cylinder; the pressing and clamping mechanism is fixed on the bottom plate on the right side of the base and comprises a supporting plate, a pressing plate, a connecting plate, a pressing rod, a connecting rod and a pressing cylinder. The crank throw eccentric hole drilling clamp has the beneficial technical effects of simple structure, convenience in use and capability of ensuring the drilling quality.

Description

Crank throw eccentric hole drill processing clamp

Technical Field

The utility model relates to a crank throw eccentric hole drilling technology, in particular to a crank throw eccentric hole drilling clamp.

Background

The crank is the main component of engine transmission torque, wherein the most important size is the eccentricity of the crank throw eccentric hole, and the performance of the engine is directly influenced by the manufacturing accuracy. The drilling of the crank throw eccentric hole is the first process of the crank throw eccentric hole, the processing is directly started from a crank forging part, a datum line or a datum plane of the eccentric hole is not provided, and only a crank rod, an eccentric hole end face and a disc part end face are used as references (see figure 1, wherein A is a crank, a is an eccentric hole end face, b is a disc part end face, and c is a crank rod).

In the prior art, the traditional machine tool clamp is also adopted to carry out crank throw eccentric hole drilling processing, and the drilling reference is still determined in a manual adjustment mode. The processing time is long, the processing size is unstable, and the processing quality and the processing efficiency are greatly influenced. Meanwhile, the number of unqualified parts is large, and the production waste is serious.

Obviously, the crank throw eccentric hole drilling method in the prior art has the problems of long processing time, unstable processing quality, serious production waste and the like.

Disclosure of Invention

The utility model provides a crank throw eccentric hole drilling clamp, aiming at solving the problems of long processing time, unstable processing quality, serious production waste and the like existing in the crank throw eccentric hole drilling method in the prior art.

The utility model discloses a crank throw eccentric hole drilling clamp which comprises a bottom plate, a base, a positioning mechanism and a pressing and clamping mechanism, wherein the bottom plate is provided with a clamping hole; the bottom plate is rectangular; the base is circular and is arranged in the middle of the bottom plate, and a curved rod through hole is formed in the center of the circular base; the diameter of the crank through hole is matched with that of the crank; the positioning mechanism is arranged on the left side of the bottom plate and comprises a positioning fork and a positioning cylinder; the front end of the positioning fork is in a split fork shape, the width of the split interval of the positioning fork is matched with that of the end face of the eccentric hole of the crank forging, and the rear end of the positioning fork is connected with a piston of the positioning cylinder; the positioning cylinder is fixed on the bottom plate on the left side of the base, and the fixed height of the positioning cylinder is based on that the lower end surface of the positioning cylinder is flush with steps on two sides of the end surface of the eccentric hole of the crank forging piece which is inverted on the base after the positioning fork extends out; after the positioning fork extends out, the opening of the positioning fork extends into the two sides of the end face of the crank eccentric hole, and the bottom of the opening of the positioning fork is just in contact with the front side of the end face of the crank eccentric hole; the pressing and clamping mechanism is fixed on the bottom plate on the right side of the base and comprises a support plate, a pressing plate, a connecting plate, a pressing rod, a connecting rod and a pressing cylinder; the support plate is fixed on the bottom plate on the right side of the base, a hinge seat is arranged on one side, close to the base, of the support plate, and a pressing cylinder is arranged on the other side of the support plate; the pressing plate is arranged at the lower end of the connecting plate, and two pressing adjusting bolts are arranged on the front side of the pressing plate; the lower end of the connecting plate is provided with a pressing plate, and the upper end of the connecting plate is connected with a pressing rod; the front end of the pressure lever is connected with a connecting plate, the middle part of the pressure lever is hinged at the upper end of the connecting rod, and the rear end of the pressure lever is hinged at the top end of the piston of the compaction cylinder; the upper end of the connecting rod is hinged to the middle of the pressure rod, and the lower end of the connecting rod is hinged to the hinge seat on the support plate; the compressing cylinder is fixed below the bottom plate, and a piston of the compressing cylinder movably penetrates through the bottom plate to be hinged with the rear end of the pressing rod.

Furthermore, the outside of location fork opening sets up the guide section that leans out, and location fork open-ended lower surface is provided with the guide section that upwards inclines.

Further, the clamp plate sets up at the connecting plate lower extreme, include, just be provided with the rectangle trompil to connecting plate lower extreme department on the clamp plate, the lower extreme of connecting plate stretches into in the rectangle trompil to make clamp plate and rotatable the linking together of connecting plate through the pin from the clamp plate side.

Furthermore, the upper end of the connecting plate is connected with a pressing rod, a rectangular opening is formed in the upper end of the connecting plate, right facing the pressing rod, the pressing rod extends into the rectangular opening, and the pressing rod is adjustably fixed together through a screw part connecting plate at the upper end of the rectangular opening.

The crank throw eccentric hole drilling clamp has the beneficial technical effects of simple structure, convenience in use and capability of ensuring the drilling quality.

Drawings

FIG. 1 is a schematic structural view of a crank;

FIG. 2 is a schematic structural view of a crank throw eccentric hole drilling fixture according to the present invention;

FIG. 3 is a schematic view of a crank clamping fixture for the crank throw eccentric hole drill processing of the present invention;

FIG. 4 is a schematic structural view of a positioning fork of the crank throw eccentric hole drilling clamp of the utility model;

FIG. 5 is a schematic view of the rotatable connection of the pressure plate and the connecting plate of the present invention;

FIG. 6 is a schematic view of the adjustable fixing structure of the connecting plate and the pressing rod of the present invention.

The crank throw eccentric hole drilling jig of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Detailed Description

FIG. 2 is a schematic structural diagram of the crank throw eccentric hole drilling clamp of the utility model, and FIG. 3 is a schematic diagram of the crank throw eccentric hole drilling clamp of the utility model clamping a crank; in the figure, 1 is a bottom plate, 2 is a base, 3 is a positioning mechanism, 301 is a positioning fork, 302 is a positioning cylinder, 4 is a pressing and clamping mechanism, 401 is a support plate, 402 is a pressing plate, 403 is a connecting plate, 404 is a pressing rod, 405 is a connecting rod, 406 is a pressing cylinder, and A is a crank forging. As can be seen from the figure, the crank throw eccentric hole drilling clamp comprises a bottom plate 1, a base 2, a positioning mechanism 3 and a pressing and clamping mechanism 4; the bottom plate 1 is rectangular; the base 2 is circular and is arranged in the middle of the bottom plate, and a curved rod through hole is formed in the center of the circular base; the diameter of the crank through hole is matched with that of the crank; the positioning mechanism 3 is arranged on the left side of the bottom plate and comprises a positioning fork 301 and a positioning cylinder 302; the front end of the positioning fork 302 is in an open fork shape, the opening distance of the positioning fork is matched with the width of the end face of the eccentric hole of the crank forging, and the rear end of the positioning fork is connected with a piston of a positioning cylinder; the positioning cylinder 302 is fixed on the bottom plate on the left side of the base, and the fixed height of the positioning cylinder is based on that the lower end surface of the positioning cylinder is leveled with steps on two sides of the end surface of the eccentric hole of the crank forging piece which is inverted on the base after the positioning fork extends out; after the positioning fork extends out, the opening of the positioning fork extends into the two sides of the end face of the crank eccentric hole, and the bottom of the opening of the positioning fork is just in contact with the front side of the end face of the crank eccentric hole; the pressing and clamping mechanism 4 is fixed on a bottom plate on the right side of the base and comprises a support plate 401, a pressing plate 402, a connecting plate 403, a pressing rod 404, a connecting rod 405 and a pressing cylinder 405; the support plate 401 is fixed on a bottom plate on the right side of the base, a hinge seat is arranged on one side, close to the base, of the support plate, and a pressing cylinder is arranged on the other side of the support plate; the pressing plate 402 is arranged at the lower end of the connecting plate, and two pressing adjusting bolts are arranged on the front side of the pressing plate; the lower end of the connecting plate 403 is provided with a pressure plate, and the upper end is connected with a pressure rod; the front end of the compression bar 404 is connected with a connecting plate, the middle part of the compression bar is hinged to the upper end of a connecting rod, and the rear end of the compression bar is hinged to the top end of a piston of a compression cylinder; the upper end of the connecting rod 405 is hinged to the middle of the pressure lever, and the lower end of the connecting rod is hinged to a hinge seat on the support plate; the compressing cylinder 406 is fixed below the bottom plate, and a piston of the compressing cylinder movably penetrates through the bottom plate to be hinged with the rear end of the compression bar. When the drill is used, the crank forging is inverted on the base, and the diameter of the through hole of the crank rod at the center of the base is matched with the diameter of the crank rod, so that the crank forging cannot shake greatly after being placed into the base. The end face of the eccentric hole of the crank forging is rotated to a position opposite to the positioning fork, the positioning cylinder is started, the piston drives the positioning fork to move forward, and the lower end face of the positioning cylinder is leveled to steps on two sides of the end face of the eccentric hole of the crank forging inverted on the base after the positioning fork extends out due to the fixed height of the positioning cylinder; and the extension length of the positioning cylinder extends out of the positioning fork, the opening of the positioning fork extends into the two sides of the end face of the crank eccentric hole, and the bottom of the opening of the positioning fork is just in contact with the front side of the end face of the crank eccentric hole. Therefore, the positioning fork can well realize accurate positioning of crank eccentric hole drilling. And the pressing cylinder is opened, the piston of the pressing cylinder pushes the rear end of the pressing rod to move upwards, and the connecting rod is converted into a vertical state, so that the pressing plate fixed at the lower part of the connecting plate at the front end of the pressing rod is positioned above the crank, and the pressing adjusting bolt on the pressing plate just abuts against the end surface of the crank disk part to form pressing clamping on the crank. Therefore, the crank throw eccentric hole drilling clamp has the advantages of simple structure, convenience in use and operation, accuracy in positioning and firmness in pressing, clamping and fastening.

Fig. 4 is a schematic structural diagram of a positioning fork of the crank throw eccentric hole drilling fixture of the utility model, wherein 301 is the positioning fork. According to the drawing, in order to facilitate the insertion of the positioning fork into the two sides of the end face of the eccentric hole of the crank, the outer side of the opening of the positioning fork is provided with an outward inclined guide section, and the lower surface of the opening of the positioning fork is provided with an upward inclined guide section. Thus, even if the size of the crank forging deviates or the crank is not placed in place, the guide section at the front end of the positioning fork can be finally inserted into a proper position.

FIG. 5 is a schematic diagram of the rotatable connection between the pressing plate and the connecting plate according to the present invention, in which 402 is the pressing plate, 403 is the connecting plate, and 404 is the pressing rod. As can be seen from the figure, in order to ensure that the pressure plate can not cause the pressure clamping of the pressure plate to be not fastened because of the unevenness of the end surface of the crank disc part, the pressure plate is arranged at the lower end of the connecting plate, the pressure plate comprises a rectangular opening which is arranged on the pressure plate and is just opposite to the lower end of the connecting plate, the lower end of the connecting plate extends into the rectangular opening, and the pressure plate and the connecting plate are rotatably connected together through a pin from the side surface of the pressure plate. With the structure, the pressing adjusting bolts on the two sides of the pressing plate have self-adaptive functions, and even if the end surface of the crank disc part is high on the left and low on the right, or a pit is formed, the pressing plate can be screwed along the pin, so that the pressing adjusting bolts on the two sides of the pressing plate have pressure.

FIG. 6 is a schematic structural diagram of the adjustable fixing of the connecting plate and the pressing rod according to the present invention, in which 402 is a pressing plate, 403 is a connecting plate, and 404 is a pressing rod. According to the drawing, in order to adapt to cranks of different specifications and models, the upper end of the connecting plate is connected with a pressing rod, a rectangular opening is arranged at the position, right opposite to the pressing rod, of the upper end of the connecting plate, the pressing rod extends into the rectangular opening, and the screw part connecting plate and the pressing rod which are arranged at the upper end of the rectangular opening are adjustably fixed together. The positions of the connecting plates on the pressure rods can be adjusted, namely the positions of the pressure points of the pressing adjusting bolts on the two sides of the pressure plate can be adjusted, so that the pressure points of the joint bolts can be always kept in the middle of the end face of the crank disc part.

Obviously, the crank throw eccentric hole drilling clamp has the beneficial technical effects of simple structure, convenience in use and capability of ensuring the drilling quality.

Claims (4)

1. The clamp for processing the eccentric hole drill of the crank throw is characterized by comprising a bottom plate, a base, a positioning mechanism and a pressing and clamping mechanism; the bottom plate is rectangular; the base is circular and is arranged in the middle of the bottom plate, and a curved rod through hole is formed in the center of the circular base; the diameter of the crank through hole is matched with that of the crank; the positioning mechanism is arranged on the left side of the bottom plate and comprises a positioning fork and a positioning cylinder; the front end of the positioning fork is in a split fork shape, the width of the split interval of the positioning fork is matched with that of the end face of the eccentric hole of the crank forging, and the rear end of the positioning fork is connected with a piston of the positioning cylinder; the positioning cylinder is fixed on the bottom plate on the left side of the base, and the fixed height of the positioning cylinder is based on that the lower end surface of the positioning cylinder is flush with steps on two sides of the end surface of the eccentric hole of the crank forging piece which is inverted on the base after the positioning fork extends out; after the positioning fork extends out, the opening of the positioning fork extends into the two sides of the end face of the crank eccentric hole, and the bottom of the opening of the positioning fork is just in contact with the front side of the end face of the crank eccentric hole; the pressing and clamping mechanism is fixed on the bottom plate on the right side of the base and comprises a support plate, a pressing plate, a connecting plate, a pressing rod, a connecting rod and a pressing cylinder; the support plate is fixed on the bottom plate on the right side of the base, a hinge seat is arranged on one side, close to the base, of the support plate, and a pressing cylinder is arranged on the other side of the support plate; the pressing plate is arranged at the lower end of the connecting plate, and two pressing adjusting bolts are arranged on the front side of the pressing plate; the lower end of the connecting plate is provided with a pressing plate, and the upper end of the connecting plate is connected with a pressing rod; the front end of the pressure lever is connected with a connecting plate, the middle part of the pressure lever is hinged at the upper end of the connecting rod, and the rear end of the pressure lever is hinged at the top end of the piston of the compaction cylinder; the upper end of the connecting rod is hinged to the middle of the pressure rod, and the lower end of the connecting rod is hinged to the hinge seat on the support plate; the compressing cylinder is fixed below the bottom plate, and a piston of the compressing cylinder movably penetrates through the bottom plate to be hinged with the rear end of the pressing rod.

2. The crank throw eccentric hole drilling jig according to claim 1, wherein the outer side of the opening of the positioning fork is provided with an outwardly inclined guide section, and the lower surface of the opening of the positioning fork is provided with an upwardly inclined guide section.

3. The crank throw eccentric hole drilling jig of claim 1, wherein the pressing plate is provided at a lower end of the connecting plate, and comprises a rectangular opening provided on the pressing plate at a position facing the lower end of the connecting plate, the lower end of the connecting plate extending into the rectangular opening, and the pressing plate and the connecting plate are rotatably connected together by a pin from a side surface of the pressing plate.

4. The crank throw eccentric hole drilling jig as claimed in claim 1, wherein the connecting plate has a pressing rod connected thereto, and includes a rectangular opening formed at an upper end of the connecting plate opposite to the pressing rod, the pressing rod extending into the rectangular opening and being adjustably fixed to the pressing rod by a screw member at the upper end of the rectangular opening.

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