Quickly-assembled jig for processing connecting rod

Abstract

The utility model discloses a quickly-assembled connecting rod processing jig, which comprises a mounting bottom plate used for connecting a connecting rod processing assembly line, and a positioning mounting plate is fixedly mounted in the middle of the upper surface of the mounting bottom plate; and the assembling air cylinder is arranged on the upper portion of the front face of the positioning mounting plate, a lifting connecting plate is fixedly mounted at the bottom of the telescopic end of the assembling air cylinder, an assembling lifting plate is fixedly mounted at the bottom end of the lifting connecting plate, and an assembling punch hammer is arranged at the bottom end of the assembling lifting plate. Assembly quality (centrality and coaxiality) and reliability are guaranteed through a high-rigidity structure and accurate positioning and guiding design, flexibility and adaptability are improved through modular design (especially a replaceable punch hammer), high-efficiency automation is achieved through air cylinder driving, and assembly efficiency is improved. The unique deflection design provides a valuable testing function before assembly so as to reduce the reject ratio, the overall structure is stable, production line integration is facilitated, and the device is perfectly matched with the key rotating pin press fitting link in connecting rod production.

Description

Technical Field

[0001] This utility model relates to the field of jig technology, and in particular to a jig for rapid assembly of connecting rods. Background Technology

[0002] In existing technologies, jigs are a broad category of tools used in woodworking, metalworking, fitting, mechanics, electrical control, and other handicrafts, primarily serving as tools to assist in controlling position or movement. Jigs can be categorized into three types: process assembly jigs, project testing jigs, and circuit board testing jigs. Jigs are typically required during the assembly of engine connecting rods. Jigs are mainly used for positioning and clamping critical components, ensuring assembly accuracy and efficiency.

[0003] For example: Assembly of connecting rod body and connecting rod cap: The connecting rod body and connecting rod cap are connected by connecting rod bolts. The fixture can accurately position the bolt hole to avoid misalignment or offset; Fitting of connecting rod small end and piston pin: The small end needs to be fitted with a bronze bushing and positioned in conjunction with the piston pin. The fixture can fix the bushing position to ensure that the coaxiality error is ≤0.02mm.

[0004] During the assembly process of the connecting rod used in the motor, the connecting rod, bushing, rotating pin and motor spindle connecting cover need to be assembled. The bushing can be directly installed in the hole at the end of the connecting rod. The bushing and rotating pin, and the rotating pin and connecting cover are interference fit. The conventional method is to first assemble the rotating pin inside the bushing, and then assemble the rotating pin and connecting cover. This assembly speed is relatively slow and not conducive to the rapid progress of the assembly work. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick-assembly jig for connecting rod processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quick-assembly jig for machining connecting rods, comprising:

[0008] The mounting base plate is used to connect the connecting rod processing line, and a positioning mounting plate is fixedly installed in the middle of its upper surface.

[0009] An assembly cylinder is located on the upper part of the front of the positioning mounting plate, and a lifting connecting plate is fixedly installed at the bottom of the telescopic end of the assembly cylinder. An assembly lifting plate is fixedly installed at the bottom of the lifting connecting plate, and an assembly punch is provided at the bottom of the assembly lifting plate.

[0010] The lower die base is assembled below the punch, and a connecting rod slot is provided at the top of the front side. A cover mounting slot is provided at the bottom wall of the connecting rod slot.

[0011] As a further embodiment of this utility model: a motor spindle connecting cover is fixedly engaged inside the mounting groove of the cover body, a motor connecting rod is engaged inside the connecting rod slot, and a rotating pin is engaged at the bottom end of the assembly hammer.

[0012] As a further embodiment of this utility model: a bottom connecting plate is fixedly installed on the lower surface of the assembly lifting plate, and an installation connecting cylinder is welded to the bottom end of the bottom connecting plate.

[0013] As a further improvement of this utility model: the top of the assembly hammer is integrally formed with a threaded post, and the threaded post is threadedly installed on the top of the inner cavity of the mounting connecting cylinder.

[0014] As a further improvement of this utility model: fixed brackets are fixedly installed on both sides of the upper surface of the assembly lifting plate, and a connecting mounting plate is fixedly connected to the back of the fixed brackets.

[0015] As a further embodiment of this utility model: a sliding column and a sliding clip are fixedly installed on the back of the connecting mounting plate, and an mounting sliding column is slidably installed inside the sliding column and the sliding clip.

[0016] As a further embodiment of this utility model: the two mounting slides are respectively fixedly installed on the bottom of the front sides of the positioning mounting plate, and a reinforcing mounting plate is fixedly installed on the back of the positioning mounting plate.

[0017] As a further embodiment of this utility model: both sides of the bottom end of the assembly lower mold base are fixedly installed with supporting side wall plates, and the supporting side wall plates are fixedly installed on the top of the mounting base plate.

[0018] As a further embodiment of this utility model: a connecting mounting bracket is fixedly installed on the outer wall of the assembly cylinder, a fixing mounting plate is fixedly installed on the back of the connecting mounting bracket, and the fixing mounting plate is fixedly installed on the top front of the positioning mounting plate.

[0019] Compared with the prior art, this utility model provides a quick-assembly jig for connecting rod processing, which has the following advantages:

[0020] This connecting rod machining fixture ensures assembly quality (centering, coaxiality) and reliability through its high-rigidity structure and precise positioning and guiding design. Its modular design (especially the replaceable punch) enhances flexibility and adaptability, while cylinder drive enables high-efficiency automation. The unique deflection design provides valuable pre-assembly testing capabilities to reduce defect rates. The overall structure is stable and easy to integrate into the production line, making it a perfect fit for the critical rotating pin press-fitting process in connecting rod production.

[0021] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the overall assembly of this utility model;

[0023] Figure 2 This is a partial cross-sectional view of the overall assembly of this utility model.

[0024] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0025] In the diagram: 1. Mounting base plate; 2. Reinforcing mounting plate; 3. Positioning mounting plate; 4. Fixing mounting plate; 5. Connecting mounting bracket; 6. Assembling cylinder; 7. Lifting connecting plate; 8. Installing sliding column; 9. Sliding column sliding clip; 10. Connecting mounting plate; 11. Fixing frame arm; 12. Assembling lifting plate; 13. Bottom connecting plate; 14. Installing connecting cylinder; 15. Supporting side wall plate; 16. Assembling lower mold base; 17. Assembling punch; 18. Connecting rod slot; 19. Cover mounting slot; 20. Motor spindle connecting cover; 21. Motor connecting rod; 22. Rotating pin. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] A quick-assembly jig for machining connecting rods, such as Figures 1 to 3 As shown, the mounting structure includes: a mounting base plate 1, a reinforcing mounting plate 2, and a positioning mounting plate 3 forming a mounting frame structure; and an assembly structure consisting of an assembly lower mold base 16 and an assembly punch 17.

[0028] The mounting base plate 1 is fixedly installed on the connecting rod processing production line. The positioning mounting plate 3 is fixedly installed on the middle of the upper surface of the mounting base plate 1 by multiple bolts. The reinforcing mounting plate 2 is fixedly installed on the back of the positioning mounting plate 3 by multiple bolts and is fixedly connected to the mounting base plate 1 by multiple bolts. The three support each other to ensure the stability of the mounting frame structure.

[0029] Both sides of the bottom end of the assembly lower mold base 16 are fixedly installed with support side wall plates 15 by bolts. The support side wall plates 15 are fixedly installed on the top of the mounting base plate 1 by bolts. The top of the front of the assembly lower mold base 16 is provided with a connecting rod slot 18, and the bottom wall of the connecting rod slot 18 is provided with a cover mounting slot 19.

[0030] The motor spindle connecting cover 20 is snapped into the inside of the cover mounting groove 19, and the motor connecting rod 21 (small end part) is snapped into the inside of the connecting rod groove 18; the small end of the motor connecting rod 21 is provided with a separate mounting groove one, and the top of the motor spindle connecting cover 20 is provided with a mounting groove two. The mounting groove one and the mounting groove two have the same diameter and are coaxially arranged.

[0031] The assembly punch 17 is positioned above the assembly lower die base 16, with its axis coinciding with the axis of the first mounting groove. The bottom end of the assembly punch 17 is provided with a mounting slot, and a rotating pin 22 is engaged inside the mounting slot. The rotating pin 22 is interference-fitted inside the second mounting groove. A bushing is fixedly installed inside the first mounting groove, and the bushing is sleeved on the outer wall of the rotating pin 22.

[0032] Reference Figure 1 The small end of the motor connecting rod 21 is engaged with the connecting rod slot 18. With the axis of the mounting slot one remaining stationary, the motor connecting rod 21 can be deflected by no more than fifteen degrees. This is used for a simple test to see if the rotation of the motor connecting rod 21 is smooth after the rotating pin 22 is installed.

[0033] An assembly cylinder 6 is located on the upper part of the front of the positioning mounting plate 3, and a lifting connecting plate 7 is fixedly installed at the bottom of the telescopic end of the assembly cylinder 6. An assembly lifting plate 12 is fixedly installed at the bottom of the lifting connecting plate 7, and an assembly punch 17 is provided at the bottom of the assembly lifting plate 12.

[0034] The outer wall of the mounting hammer 17 is fitted with a mounting connecting cylinder 14, and the top of the mounting hammer 17 is integrally formed with a threaded post. The threaded post is threaded onto the inner wall of the top of the mounting connecting cylinder 14, which facilitates the quick replacement of the corresponding mounting hammer 17 according to the size of the rotating pin 22.

[0035] A bottom connecting plate 13 is welded to the top of the mounting connecting cylinder 14. An assembly lifting plate 12 is fixedly installed on the top of the bottom connecting plate 13 by bolts. A lifting connecting plate 7 is fixedly installed on the front end of the upper surface of the assembly lifting plate 12 by bolts.

[0036] Both sides of the upper surface of the assembly lifting plate 12 are fixedly installed with fixed bracket arms 11 by bolts. A connecting mounting plate 10 is fixedly connected to the back of the fixed bracket arm 11. A sliding column and sliding clip 9 are fixedly installed on the back of the connecting mounting plate 10. An installation sliding column 8 is slidably installed inside the sliding column and sliding clip 9.

[0037] Two mounting slides 8 are fixedly installed on the bottom of the front sides of the positioning mounting plate 3 by bolts, and limit slots are opened on both sides of the mounting slides 8. The inner walls of the slides 9 are integrally formed with limit posts that cooperate with the limit slots.

[0038] A fixed mounting plate 4 is fixedly installed on the upper part of the front of the positioning mounting plate 3. A connecting mounting bracket 5 is fixedly installed on the front of the fixed mounting plate 4. An assembly cylinder 6 is fixedly installed inside the connecting mounting bracket 5. The telescopic end of the assembly cylinder 6 is fixedly installed on the top of the lifting connecting plate 7. The assembly cylinder 6 is purchased from the market as needed. It is a mature technology, and this application will not describe it and its supporting structure in detail.

[0039] Working principle:

[0040] Please refer to Figures 1 to 3 Assemble the device as shown in the figure;

[0041] During assembly, the device is first installed on the connecting rod processing line via the mounting base plate 1. Then, the motor spindle connecting cover 20 is placed inside the cover mounting groove 19 (the two are overfitted). Next, the small end of the motor connecting rod 21 is engaged inside the connecting rod groove 18 (the two are overfitted). Then, the rotating pin 22 is engaged inside the mounting groove at the bottom of the assembly punch 17. Finally, the assembly cylinder 6 is activated, and the assembly cylinder 6 extends, driving the mounting connecting cylinder 14 downward through the lifting connecting plate 7 and the assembly lifting plate 12. This causes the assembly punch 17 to install the rotating pin 22 inside the mounting groove one and the mounting groove two, completing the assembly of the motor connecting rod 21 and the motor spindle connecting cover 20 (Note: Before conventional assembly, the rotating pin 22 needs to be cold-shrinked).

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-assembly jig for machining connecting rods, characterized in that, include: Mounting base plate (1), which is used to connect the connecting rod processing line, and a positioning mounting plate (3) is fixedly installed in the middle of its upper surface; An assembly cylinder (6) is set on the upper part of the front of the positioning mounting plate (3), and a lifting connecting plate (7) is fixedly installed at the bottom of the telescopic end of the assembly cylinder (6). An assembly lifting plate (12) is fixedly installed at the bottom end of the lifting connecting plate (7), and an assembly punch (17) is provided at the bottom end of the assembly lifting plate (12). The lower mold base (16) is assembled below the punch (17), and a connecting rod slot (18) is provided at the top of the front side. The bottom wall of the connecting rod slot (18) is provided with a cover mounting slot (19). The motor spindle connecting cover (20) is fixedly engaged inside the cover mounting groove (19), the motor connecting rod (21) is engaged inside the connecting rod groove (18), and the bottom end of the assembly hammer (17) is engaged with a rotating pin (22).

2. The quick-assembly connecting rod machining fixture according to claim 1, characterized in that: A bottom connecting plate (13) is fixedly installed on the lower surface of the assembly lifting plate (12), and an installation connecting cylinder (14) is welded to the bottom end of the bottom connecting plate (13).

3. The quick-assembly connecting rod machining fixture according to claim 2, characterized in that: The top of the assembly hammer (17) is integrally formed with a threaded post, which is threadedly installed on the top of the inner cavity of the mounting connecting cylinder (14).

4. The quick-assembly connecting rod machining fixture according to claim 1, characterized in that: Fixed arms (11) are fixedly installed on both sides of the upper surface of the assembly lifting plate (12), and a connecting mounting plate (10) is fixedly connected to the back of the fixed arms (11).

5. A quick-assembly connecting rod machining fixture according to claim 4, characterized in that: The back of the connecting mounting plate (10) is fixedly installed with a sliding column and a sliding clip (9), and the sliding column and the sliding clip (9) are slidably installed with a mounting column (8).

6. A quick-assembly connecting rod machining fixture according to claim 5, characterized in that: The two mounting slides (8) are fixedly installed on the bottom of the front sides of the positioning mounting plate (3), and a reinforcing mounting plate (2) is fixedly installed on the back of the positioning mounting plate (3).

7. A quick-assembly connecting rod machining fixture according to claim 1, characterized in that: Both sides of the bottom end of the assembly lower mold base (16) are fixedly installed with support side wall plates (15), and the support side wall plates (15) are fixedly installed on the top of the mounting base plate (1).

8. A quick-assembly connecting rod machining fixture according to claim 1, characterized in that: The outer wall of the assembly cylinder (6) is fixedly mounted with a connecting mounting bracket (5), and a fixing mounting plate (4) is fixedly mounted on the back of the connecting mounting bracket (5). The fixing mounting plate (4) is fixedly mounted on the top front of the positioning mounting plate (3).

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