Fixture for machining engine connecting rod milling side face threaded tail hole

Abstract

The utility model discloses a fixture for processing engine connecting rod milling side threaded tail hole, which comprises a rotary table, the side wall of the rotary table is fixedly connected with a mounting plate and a small-head positioning device, the small-head positioning device comprises a small-head positioning pin, a small-head base and a T-shaped nut, the small-head base is fixedly connected with the side wall of the mounting plate through the T-shaped nut, and the small-head positioning pin is fixedly connected with the mounting plate through the T-shaped nut. The side wall of the small-head base is fixedly connected with a small-head positioning pin and a large-head positioning device through T-shaped nuts, the large-head positioning device comprises a large-head positioning pin and a large-head base, the large-head base is fixedly connected with the side wall of the mounting plate through T-shaped nuts, and the side wall of the large-head base is fixedly connected with a large-head positioning pin through T-shaped nuts. A plurality of long-strip-shaped T-shaped grooves matched with the T-shaped nuts are formed in the side wall of the mounting plate. The clamp can clamp a plurality of workpieces at one time, is uniform in reference, simple in structure and convenient to operate, improves the machining efficiency, and ensures the precision and the quality of the workpieces at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp used for processing a threaded tail hole of a milled side surface of an engine connecting rod. Background Art

[0002] The connecting rod is one of the main transmission mechanisms of a car engine. It connects the piston and the crankshaft, transmits the expanding gas pressure acting on the top of the piston to the crankshaft, and reversibly converts the reciprocating linear motion of the piston into the rotational motion of the crankshaft to output power.

[0003] In the prior art, the fixture for machining the threaded tail hole on the side of the engine connecting rod has the following shortcomings:

[0004] (1) Most of them adopt single-station layout;

[0005] (2) The center distance between the big head and the small head of the positioning connecting rod cannot be adjusted. This type of fixture can only process a single type of connecting rod and cannot adapt to the processing of connecting rods of different types, and has poor versatility;

[0006] (3) The connecting rod side and threaded tail hole are in two directions and cannot be processed simultaneously in one sequence, so they are generally processed in two sequences. From these aspects, this greatly reduces work efficiency.

[0007] Based on this, we propose a fixture for machining the threaded tail hole on the side of the engine connecting rod. Utility Model Content

[0008] The utility model aims to solve the shortcomings in the prior art and proposes a clamp for machining a threaded tail hole on the milling side of an engine connecting rod.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A fixture for machining a threaded tail hole on the milled side of an engine connecting rod, comprising a rotating table, a side wall of which is fixedly connected to a mounting plate;

[0011] A small head positioning device, the small head positioning device comprises a small head positioning pin, a small head base and a T-nut, the small head base is fixedly connected to the side wall of the mounting plate through the T-nut, and the side wall of the small head base is fixedly connected to the small head positioning pin through the T-nut;

[0012] A big head positioning device comprises a big head positioning pin and a big head base, the big head base is fixedly connected to the side wall of the mounting plate through a T-nut, and the side wall of the big head base is fixedly connected to the big head positioning pin through a T-nut.

[0013] Preferably, the side wall of the mounting plate is provided with a plurality of long T-shaped slots cooperating with the T-shaped nuts, and the small head base and the large head base are both provided with mounting holes cooperating with the T-shaped nuts.

[0014] Preferably, a one-way clamping device is installed on the mounting plate, and the one-way clamping device includes a cylinder, a first clamping seat, a transmission pin, and a second clamping seat. The side wall of the mounting plate is fixedly connected to the cylinder, and the movable end of the cylinder is rotatably connected to the first clamping seat through the transmission pin, and the side wall of the first clamping seat is fixedly connected to the second clamping seat through a threaded rod.

[0015] Preferably, the one-way clamping device further comprises a small-head clamping seat, and the side wall of the mounting plate is fixedly connected to the small-head clamping seat via a threaded rod.

[0016] Preferably, the small head positioning pin and the small head base are an integrated sliding structure.

[0017] Preferably, the small-head positioning pin is a diamond-shaped pin, the large-head positioning pin is a round pin, and the second clamping seat and the small-head clamping seat are both V-shaped.

[0018] The utility model has the following beneficial effects:

[0019] 1. By setting up the small head positioning device and the large head positioning device, multiple workpieces can be clamped at one time, and the benchmarks are unified, the structure is simple, and the operation is convenient, which not only improves the processing efficiency, but also ensures the accuracy and quality of the workpiece.

[0020] 2. By setting up a one-way clamping device, the workpiece is clamped by the oil cylinder, which can automatically clamp the workpiece with good clamping effect, greatly improving the processing accuracy of the workpiece.

[0021] 3. The small head locating pin in this device is movably arranged, and the center distance between the big head and the small head can be adjusted relative to the big head locating pin, so as to adapt to the processing of workpieces with different sizes and types of spacing. It can be used for the processing of various types of connecting rods, with good practicality. The second clamping seat and the small head clamping seat adopt a hidden channel design, which is easy to clean and not easy to damage, and greatly improves the processing efficiency.

[0022] 4. The second clamping seat and the small head clamping seat are V-shaped, evenly distributed and compacted, with a reasonable layout, simple structure and good flexibility. The second clamping seat and the small head clamping seat are set as quick-change type, which can be applied to the processing of various connecting rods, greatly saving the research and development time and production cost of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a fixture for machining a threaded tail hole on the side of an engine connecting rod according to the utility model;

[0024] Figure 2 for Figure 1 Exploded view of the small and medium head positioning device;

[0025] Figure 3 for Figure 1 Exploded view of the medium and large head positioning device;

[0026] Figure 4 for Figure 1 Schematic diagram of the one-way clamping device.

[0027] In the figure: 1 rotating table, 2 mounting plate, 3 small head positioning device, 4 large head positioning device, 5 one-way clamping device, 6 small head clamping seat, 7 small head positioning pin, 8 small head base, 9 T-nut, 10 large head positioning pin, 11 large head base, 12 oil cylinder, 13 first clamping seat, 14 transmission pin, 15 second clamping seat. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Reference Figure 1-Figure 4 , a fixture for machining a threaded tail hole of a milled side of an engine connecting rod, comprising a rotating table 1, a mounting plate 2 being fixedly connected to a side wall of the rotating table 1;

[0030] It should be noted that the rotating table 1 can drive the disk to rotate circumferentially, and this component is a purchased standard component and is a prior art.

[0031] A small head positioning device 3, the small head positioning device comprises a small head positioning pin 7, a small head base 8 and a T-nut 9, the small head base 8 is fixedly connected to the side wall of the mounting plate 2 through the T-nut 9, and the side wall of the small head base 8 is fixedly connected to the small head positioning pin 7 through the T-nut 9;

[0032] The small head positioning pin 7 and the small head base 8 are an integrated structure. A positioning platform is also provided at the lower end of the small head base 8. A groove for accommodating the positioning platform of the small head base 8 is provided on the mounting plate 2. During installation, the positioning platform at the lower end of the small head base 8 is placed in the groove of the mounting plate 2. According to the model of the engine connecting rod of the workpiece to be processed, the small head base 8 is adjusted to the desired position.

[0033] The big head positioning device 4 includes a big head positioning pin 10 and a big head base 11. The big head base 11 is fixedly connected to the side wall of the mounting plate 2 through a T-nut 9. The side wall of the big head base 11 is fixedly connected to the big head positioning pin 10 through a T-nut 9.

[0034] The side wall of the mounting plate 2 is provided with a plurality of long T-shaped slots matched with the T-shaped nuts 9 , and both the small head base 8 and the large head base 11 are provided with mounting holes matched with the T-shaped nuts 9 .

[0035] A one-way clamping device 5 is installed on the mounting plate 2, and the one-way clamping device 5 includes a cylinder 12, a first clamping seat 13, a transmission pin 14, and a second clamping seat 15. The side wall of the mounting plate 2 is fixedly connected to the cylinder 12, and the movable end of the cylinder 12 is rotatably connected to the first clamping seat 13 through the transmission pin 14, and the side wall of the first clamping seat 13 is fixedly connected to the second clamping seat 15 through a threaded rod.

[0036] The one-way clamping device 5 also includes a small-head clamping seat 6, and the side wall of the mounting plate 2 is fixedly connected to the small-head clamping seat 6 via a threaded rod.

[0037] The small head positioning pin 7 and the small head base 8 are an integrated sliding structure.

[0038] The small-head locating pin 7 is a diamond-shaped pin, which prevents the workpiece from rotating but does not over-locate, so as to better position the engine. The connecting rod big-end locating pin 10 is a round pin, which positions and supports the workpiece. The second clamping seat 15 and the small-head clamping seat 6 are both V-shaped.

[0039] In the utility model, firstly, different second clamping seats 15 and small-end clamping seats 6 can be selected according to the model of the engine connecting rod. After selection, the second clamping seat 15 and the small-end clamping seat 6 are respectively installed on the side wall of the first clamping seat 13 and the side wall of the mounting plate 2 through threaded rods, and then the positions of the small-end locating pin 7 and the large-end locating pin 10 are respectively adjusted, and then the T-nut 9 is tightened to fix it, and finally the oil cylinder 12 is driven to operate, driving the second clamping seat 15 to clamp the large end of the engine connecting rod, and the small-end clamping seat 6 will clamp and fix the small end of the engine connecting rod, and finally the side milling of the engine connecting rod can be carried out, and the threaded tail hole on the engine connecting rod can also be drilled and tapped.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fixture for machining the threaded tail hole on the side of the engine connecting rod. It is characterized in that include: A rotating table (1), wherein a mounting plate (2) is fixedly connected to a side wall of the rotating table (1); A small head positioning device (3), the small head positioning device comprising a small head positioning pin (7), a small head base (8) and a T-shaped nut (9), the small head base (8) being fixedly connected to the side wall of the mounting plate (2) via the T-shaped nut (9), and the side wall of the small head base (8) being fixedly connected to the small head positioning pin (7) via the T-shaped nut (9); A big head positioning device (4), the big head positioning device (4) comprising a big head positioning pin (10) and a big head base (11), the big head base (11) being fixedly connected to the side wall of the mounting plate (2) via a T-nut (9), and the side wall of the big head base (11) being fixedly connected to the big head positioning pin (10) via a T-nut (9).

2. A fixture for machining the threaded tail hole of the milled side of an engine connecting rod according to claim 1, It is characterized in that in: The side wall of the mounting plate (2) is provided with a plurality of long T-shaped slots that cooperate with the T-shaped nuts (9), and the small head base (8) and the large head base (11) are both provided with mounting holes that cooperate with the T-shaped nuts (9).

3. A fixture for machining the threaded tail hole of the milled side of an engine connecting rod according to claim 2, It is characterized in that in: A one-way clamping device (5) is installed on the mounting plate (2), and the one-way clamping device (5) comprises an oil cylinder (12), a first clamping seat (13), a transmission pin (14), and a second clamping seat (15). The side wall of the mounting plate (2) is fixedly connected to the oil cylinder (12), the movable end of the oil cylinder (12) is rotatably connected to the first clamping seat (13) through the transmission pin (14), and the side wall of the first clamping seat (13) is fixedly connected to the second clamping seat (15) through a threaded rod.

4. A fixture for machining the threaded tail hole of the milled side of an engine connecting rod according to claim 3, It is characterized in that in: The one-way clamping device (5) further comprises a small-head clamping seat (6), and the side wall of the mounting plate (2) is fixedly connected to the small-head clamping seat (6) via a threaded rod.

5. A fixture for machining the threaded tail hole of the milled side of an engine connecting rod according to claim 4, It is characterized in that in: The small head positioning pin (7) and the small head base (8) are an integrated sliding structure.

6. A fixture for machining the threaded tail hole of the milled side of an engine connecting rod according to claim 5, It is characterized in that in: The small-head positioning pin (7) is a diamond-shaped pin, the large-head positioning pin (10) is a round pin, and the second clamping seat (15) and the small-head clamping seat (6) are both in a V shape.

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