Positioning and pressing mechanism for machining connecting rod of automobile engine

Abstract

The utility model relates to a positioning and pressing mechanism for processing an automobile engine connecting rod, which is characterized by comprising a base body, and a first vertical hole is formed in the center of the base body. A linear cylinder is arranged in the bottom of the first vertical hole, and first slopes are evenly distributed at the upper end of a piston rod of the linear cylinder in the circumferential direction. A radial hole is formed in the base body corresponding to the first inclined face, and an ejector rod is arranged in the radial hole. Second slopes are arranged at the inner ends of the ejector rods. An upper base is connected to the base body, and vertical notches are formed in the two sides of the upper base. And a second vertical hole is formed in the base body corresponding to the vertical notch. A second bottom cover is arranged at the lower end of the second vertical hole and internally provided with a second piston rod and a piston. A guide groove is formed in the outer circumference of the second piston rod below the piston in the circumferential direction, a ball head is arranged on the inner circle of the second vertical hole corresponding to the guide groove, and the ball head movably extends into the corresponding guide groove. Pressing arms are arranged at the upper ends of the second piston rods. By adopting the device, the equipment investment can be reduced, and the production cost can be reduced. The positioning device is suitable for positioning during automobile engine connecting rod machining.

Description

Technical Field

[0001] This utility model relates to a clamp. Specifically, it is a positioning and clamping mechanism used to fix connecting rods during the machining of automobile engines. Background Technology

[0002] In the field of automotive engine connecting rods, clamping and positioning are required during machining. The traditional method involves first setting a vertical roughing pin on the worktable with a diameter matching the large hole diameter at one end of the connecting rod, and then fitting the large hole onto this pin. At least two hydraulic cylinders are then used to press the connecting rod around the large hole. This achieves positioning during machining. While this method effectively positions the connecting rod, the use of numerous hydraulic cylinders makes it cumbersome to operate, requires significant equipment investment, and results in high production costs. Utility Model Content

[0003] The problem this invention aims to solve is to provide a positioning and clamping mechanism for machining connecting rods in automotive engines. This invention is easy to operate. Using this invention can reduce equipment investment and lower production costs.

[0004] The above-mentioned problems to be solved by this utility model are achieved by the following technical solutions:

[0005] The positioning and clamping mechanism for machining connecting rods in an automotive engine, as described in this utility model, comprises a cylindrical base with a radial flange on its lower outer circumference and a first vertical hole at its center. A linear cylinder is located at the bottom of the first vertical hole, with its piston rod facing upwards and a first bottom cover at its lower end. The upper end of the piston rod is tapered, with first inclined surfaces evenly distributed circumferentially on its tapered end. A radial hole is located on the base corresponding to the first inclined surface, and a push rod is located within each radial hole. The inner end of each push rod has a second inclined surface that slides with the first inclined surface. An upper seat, cylindrical in shape with the same outer diameter as the base, is connected to the base, and vertical notches are located on both sides of the upper seat. A second vertical hole is located on the base corresponding to each vertical notch, and a second bottom cover is located at the lower end of each second vertical hole, containing a second piston rod. A piston is connected to the second piston rod, with a gap between the piston and the second bottom cover. The upper end of each second piston rod extends movably beyond the second vertical hole. The second piston rod below the piston has a guide groove on its outer circumference. The upper section of the guide groove is parallel to the second piston rod, and their lower sections are bent in opposite directions. A ball head is located on the inner circumference of the second vertical hole corresponding to the guide groove, and this ball head extends movably into the corresponding guide groove. Each of the second piston rods has a pressure arm at its upper end. These pressure arms are all arranged laterally, with one end connected to the upper end of the second piston rod, and the other end rotatable to the outer circumference of the upper seat.

[0006] The upper seat is connected to the upper end of the base by means of bolts.

[0007] The upper seat has three vertical holes on its lower part except for the notch, and the upper part of the base corresponding to the three vertical holes has three screw holes. The upper seat and the base are connected together by the three vertical holes, the three screw holes and the three bolts.

[0008] A further improvement of this utility model is that the piston rod is connected to a connector, the upper end of which is a tapered end, and the three first inclined surfaces are located circumferentially on the tapered end.

[0009] As can be seen from the above technical solution, during operation, hydraulic oil is first injected into the gap between the piston and the second bottom cover via a hydraulic workstation. As the hydraulic oil pressure increases, the two second piston rods, guided by the guide grooves and ball heads on the inner circle of the second vertical hole, rotate at an angle in the counterclockwise and clockwise directions respectively while rising. This causes the outer ends of the two pressure arms to rotate outward simultaneously, ensuring that the outer sides of both pressure arms rotate beyond the outer circle of the base. This achieves the clamping and positioning of the connected rod of the automobile engine being processed. Compared with the prior art, this solution is not only easier to operate but also reduces equipment investment and lowers production costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the positioning and clamping mechanism for machining connecting rods of an automobile engine according to this utility model;

[0011] Figure 2 yes Figure 1 Top view diagram;

[0012] Figure 3 yes Figure 2 AA sectional view;

[0013] Figure 4 yes Figure 1 BB cross-sectional diagram;

[0014] Figure 5 This is a three-dimensional schematic diagram of the positioning and clamping mechanism for machining connecting rods of an automobile engine according to this utility model;

[0015] Figure 6 This is a three-dimensional schematic diagram of a positioning and clamping mechanism for machining connecting rods of an automobile engine with the workpiece being processed. Detailed Implementation

[0016] like Figures 1-6As shown, the positioning and clamping mechanism for machining connecting rods of an automobile engine of this utility model includes a base 1. The base 1 is cylindrical, with a radial flange 101 machined circumferentially on its lower outer circumference, and a first vertical hole machined at its center. A linear cylinder 3 is installed in the bottom of the first vertical hole, with the piston rod 301 of the linear cylinder 3 facing upwards, and a first bottom cover 6 fixed at its lower end. The upper end of the piston rod 301 is tapered, with three first inclined surfaces 7 evenly distributed circumferentially on the tapered end. Radial holes are machined on the base 1 corresponding to the first inclined surfaces 7, and push rods 5 are provided in each of the radial holes. The inner end of each push rod 5 is machined with a second inclined surface, which slides in fit with the first inclined surfaces 7. An upper seat 2 is provided on the base 1, which is cylindrical, with the same outer diameter as the base 1, and vertical notches machined on both sides. A second vertical hole is machined on the base 1 corresponding to the vertical notch. A second bottom cover 8 is fixed to the lower end of the second vertical hole, and a second piston rod 9 is installed inside it.

[0017] A piston 91 is connected to the second piston rod 9, and there is a gap between the piston 91 and the second bottom cover 8. The upper ends of the second piston rod 9 extend movably above the second vertical hole. A guide groove 92 is machined circumferentially on the outer circumference of the second piston rod 9 below the piston 91. The upper section of the guide groove 92 is parallel to the second piston rod, and their lower sections are bent in opposite directions. A ball head is machined on the inner circle of the second vertical hole corresponding to the guide groove 92, and the ball head extends movably into the corresponding guide groove 92. A pressure arm 10 is provided at the upper end of the second piston rod 9. The pressure arm 10 is arranged laterally, and one end of it is connected to the upper end of the second piston rod 9 by means of a nut.

[0018] The upper seat 2 has three vertical holes machined on its lower part except for the notch, and the base 1 has three screw holes machined on its upper end corresponding to the three vertical holes. The upper seat 2 and the base 1 are connected together by the three vertical holes, the three screw holes and the three bolts 11.

[0019] For ease of installation and disassembly, a connector 4 is attached to the piston rod 301. The upper end of the connector 4 is a tapered end, and the three first inclined surfaces 7 are located circumferentially on the tapered end.

[0020] During operation, hydraulic oil is first injected into the gap between the piston 91 and the second bottom cover 8 via a hydraulic workstation. As the hydraulic oil pressure increases, the two second piston rods 9, guided by the guide grooves on their guides and the ball heads on the inner circle of the second vertical hole, rotate at an angle in the counterclockwise and clockwise directions respectively while rising. This causes the outer ends of the two pressure arms 10 to rotate outward simultaneously, so that the outer sides of the two pressure arms 10 rotate outside the outer circle of the base 1 and press against the large hole end of the automotive engine connecting rod 12 being processed. This achieves the clamping and positioning of the automotive engine connecting rod 12 being processed.

Claims

1. A positioning and clamping mechanism for machining connecting rods of automobile engines, characterized in that: The utility model relates to a kind of cylinder type automatic feeding device, including base (1), the base (1) is cylindrical, its lower end outer circumference has radial baffle (101), with first vertical hole in the center;Linear cylinder (3) is in the first vertical hole bottom, the piston rod (301) of the linear cylinder (3) is upward, and its lower end has first bottom cover (6);The upper end of the piston rod (301) is tapered end, and the first inclined surface (7) is uniformly distributed in the circumference of the tapered end;Radial hole is in the base (1) corresponding to first inclined surface (7), and the radial hole has ejector rod (5);Second inclined surface is in the inner end of the ejector rod (5) and is slidably connected with first inclined surface (7);Upper seat (2) is connected to the base (1), and the upper seat (2) is cylindrical, and its outer diameter is same with base (1), and its both sides have vertical notch;Second vertical hole is in the base (1) corresponding to vertical notch, and the second vertical hole lower end has second bottom cover (8), and its inside has second piston rod (9);Piston (91) is connected to the second piston rod (9), and the piston (91) is spaced apart from second bottom cover (8);Second piston rod (9) upper end is movably extended above the second vertical hole;Second piston rod (9) outer circumference has guide slot (92) under piston (91), the upper section of the guide slot (92) is parallel with second piston rod, and their lower section is curved to opposite direction;Ball head is in the second vertical hole inner circle corresponding to guide slot (92), and the ball head is movably extended into corresponding guide slot (92);Second piston rod (9) upper end has pressing arm (10);The pressing arm (10) is transversely arranged, and one end is connected with second piston rod (9) upper end.

2. The positioning and pressing mechanism for machining of an automobile engine connecting rod according to claim 1, characterized in that: The upper seat (2) is connected with the upper end of the base (1) by means of bolt (11).

3. The positioning and pressing mechanism for machining of a connecting rod of an automobile engine according to claim 1, characterized in that: The lower part of the upper seat (2) has three vertical holes except the notch, and the upper end of the base (1) has three screw holes corresponding to the three vertical holes, and the upper seat (2) and the base (1) are connected by means of the three vertical holes, the three screw holes and the three bolts (11).

4. The positioning and pressing mechanism for machining of an automobile engine connecting rod according to any one of claims 1 to 3, characterized in that: The piston rod (301) is connected with joint (4), the upper end of the joint (4) is tapered end, and the three first inclined surfaces (7) are located in the circumference of the tapered end.

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