Connecting rod press-fitting assembly assembling production line

Abstract

The utility model relates to the technical field of connecting rod press fitting, in particular to an assembling production line of a connecting rod press fitting assembly, which comprises a bushing press fitting machine, the surface of the bushing press fitting machine is provided with a limiting component for limiting a connecting rod, and the surface of the bushing press fitting machine is connected with a press fitting head driven by a hydraulic mechanism in a sliding manner. According to the connecting rod press-fitting assembly assembling production line, a press-fitting head descends, an abutting groove in the bottom is extruded above a small end of a connecting rod, at the moment, a lining is located over the connecting rod, then an air cylinder drives a pressing ring to move downwards, at the moment, air of an expansion air bag is released instantly, and the pressing ring rapidly pushes the expanded lining to the position above the connecting rod for press-fitting; and then the bushing quickly shrinks and is firmly pressed on the surface of the connecting rod under the deformation of the bushing, so that the connecting rod and the bushing can be effectively assembled, the assembly effect is good, the precision of a finished product is higher, and the bushing and the connecting rod cannot be damaged during pressing.

Description

TECHNICAL FIELD

[0001] The utility model relates to connecting rod press mounting technical field, concretely is a connecting rod press mounting assembly assembly production line. BACKGROUND

[0002] The small end pin hole of the connecting rod is usually equipped with a bushing, and the material of the bushing is generally different from that of the connecting rod body to reduce friction and scraping, improve load transmission capacity and anti-seizure.

[0003] The connecting rod with gradually reduced width of the small end is usually called "wedge-shaped" or "trapezoidal" connecting rod. In the case of the wedge-shaped structure of the small end of the connecting rod, the matching bushing is a wedge-shaped cylindrical shape corresponding to the inner wall of the pin hole. In this way, when the standard press and special fixture are used for self-centering press mounting of the connecting rod bushing, the small end of the connecting rod will produce a torque in the process of press mounting due to poor local press mounting rigidity, causing the bushing to be cut and squeezed, which is particularly true in the case of "wedge-shaped" or "trapezoidal" connecting rod. Specifically, during installation, the non-horizontal area around the pin hole of the wedge-shaped small end causes the bushing to deviate, that is, the bushing is no longer parallel to the pin hole. This will cause the bushing and the pin hole to be misaligned or the bushing to be deformed, resulting in uneven contact between the bushing and the pin hole, which can cause permanent failure of the bushing. In addition, this misalignment will make the surface of the bushing in contact with the piston pin irregular, which can increase the scraping and cause engine damage. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a connecting rod press mounting assembly assembly production line, which solves the above-mentioned problems.

[0005] In order to achieve the above object, the utility model discloses a connecting rod press -fitting assembly assembly production line, including bush press -fitting machine, the surface of bush press -fitting machine is provided with the limiting assembly for the limiting of connecting rod, the surface of bush press -fitting machine is slidably connected with the press -fitting head of driving through hydraulic mechanism, the surface of bush press -fitting machine is movably connected with the bush conveying belt of driving left and right movement through driving mechanism, the inner chamber of press -fitting head is opened with the abutment groove of adapting with the connecting rod small head, the surface of press -fitting head is slidably connected with the pressure ring of driving through the gas cylinder, the surface of press -fitting head is surrounded with the inflation air bag of the inner chamber abutment of bush through the gas supply pipe, when using, bush is input through bush conveying belt, then press -fitting head drops and inserts in the inside of bush, then the inflation air bag is supplied with gas through the gas pipe, and bush is positioned, and it is pried open, then bush conveying belt is retracted, and after the positioning of connecting rod is finished, the abutment groove of press -fitting head descending bottom is extruded on the small head of connecting rod, now bush is located the top of connecting rod, then the pressure ring is driven to move downward through the gas cylinder, and now the inflation air bag gas is released instantaneously, and the bush of expansion is quickly pushed and pushed to the top of connecting rod and is press -fitted, then under the self deformation, bush is quickly contracted and is press -fitted on the surface of connecting rod, can effectively assemble between connecting rod and bush, and the assembly effect is good, and the finished product precision is higher, and when press -fitted, will not cause the damage of bush and connecting rod.

[0006] As a further scheme of the utility model: the limiting assembly includes the connecting rod positioning frame fixed on the surface of the bush press -fitting machine, one side of the connecting rod positioning frame is fixedly connected with the support frame abutting against the surface of the connecting rod body, and the top of the support frame is fixedly connected with the positioning rod inserted into the inner hole of the connecting rod. The small head of the connecting rod is placed in the connecting rod positioning frame, so that the small head is vertically arranged. Then, the connecting rod body is placed on the support frame and is attached by the support frame. Then, the positioning rod is used for positioning, so that the connecting rod can be effectively fixed.

[0007] As a further scheme of the utility model: the surface of the inflation air bag is sleeved with the rubber positioning ring. The rubber positioning ring is tightly held, so that the inflation air bag can be uniformly expanded to pry open the bush.

[0008] As a further scheme of the utility model: the surface of the press -fitting head is fixedly connected with the upper pressing block. The bottom of the upper pressing block is provided with the positioning groove matched with the surface of the connecting rod. The inner chamber of the upper pressing block is provided with the insertion slot for the positioning rod to penetrate. The upper pressing block and the positioning groove are used for positioning, so that the upper pressing block can be prevented from being warped and deformed under the pressure of the press -fitting head.

[0009] As a further scheme of the utility model: the pressure ring is annularly sleeved on the surface of the press -fitting head. The bush pried open by the inflation air bag is quickly press -fitted on the small head of the connecting rod and is connected by the downward movement of the pressure ring.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1、The utility model discloses a press -fit head bottom's abutment groove extrusion is above the small head of connecting rod, when the bushing is located the just above connecting rod, then through the cylinder drive pressure ring downward movement, and when instantaneously release the inflation air bag gas, and the pressure ring fast pushes the inflation bushing to the connecting rod top and carries out the press -fit, then under the self deformation, the bushing fast contracts and is pressed -fitted on the connecting rod surface, can effectively assemble between the connecting rod and the bushing, and the assembly effect is good, and the finished product precision is higher, when press -fiting, will not cause the damage to the bushing and the connecting rod. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] Figure 2 It is the utility model Figure 1 It is the partial close -up of A place in the utility model;

[0014] Figure 3 It is the structural schematic diagram of the press -fit head of the utility model.

[0015] In the drawing: 1, bushing press -fit machine;2, connecting rod positioning frame;3, support frame;4, positioning rod;5, connecting rod;6, press -fit head;7, upper pressure block;8, positioning groove;9, plug -in slot;10, gas pipe;11, abutment groove;12, gas pipe;13, bushing;14, rubber positioning ring;15, pressure ring. DETAILED DESCRIPTION

[0016] In order to further illustrate the utility model for realizing the technical means and the effect of predetermined utility model purpose, the following is combined with the preferred embodiment, and the specific embodiment, structure, characteristics and effect of the utility model are described in detail as follows.

[0017] Please refer to Figures 1-3The utility model provides a technical scheme: a connecting rod press -fitting assembly assembly production line, including bushing press -fitting machine 1, the surface of bushing press -fitting machine 1 is provided with the limiting assembly for the limiting of connecting rod 5, the surface of bushing press -fitting machine 1 is slidably connected with the press -fitting head 6 driven through hydraulic mechanism, the surface of bushing press -fitting machine 1 is movably connected with the bushing conveying belt that can move left and right through the drive mechanism drive, the inner chamber of press -fitting head 6 is opened with the abutment groove 11 of the small head adaptation of connecting rod 5, the surface of press -fitting head 6 is slidably connected with the pressure ring 15 driven through the cylinder, the surface of press -fitting head 6 is surrounded with the inflation air bag 12 that the inner chamber of bushing 13 is abutted through the air pipe 10 supply, when using, bushing 13 is input through bushing conveying belt, then press -fitting head 6 is inserted in the inside of bushing 13 and then is lowered, then inflation air bag 12 is supplied with gas through air pipe 10, bushing 13 is positioned, and it is opened, then bushing conveying belt is withdrawn, after the positioning of connecting rod 5 is finished, the abutment groove 11 of press -fitting head 6 descending bottom extrudes above the small head of connecting rod 5, at this moment, bushing 13 is located directly above connecting rod 5, then pressure ring 15 is driven to move downward through cylinder, and at this moment, inflation air bag 12 gas is released instantaneously, and the expanded bushing 13 is quickly pushed to the above of connecting rod 5 to press -fit, then bushing 13 is quickly contracted and press -fitted on the surface of connecting rod 5 under the deformation of itself, can effectively assemble between connecting rod 5 and bushing 13, and the assembly effect is good, and the finished product precision is higher, and when press -fitting, bushing 13 and connecting rod 5 will not be damaged.

[0018] The limiting assembly includes a connecting rod positioning frame 2 fixed to the surface of the bushing press -fitting machine 1, a support frame 3 abutting against the surface of the connecting rod body is fixedly connected to one side of the connecting rod positioning frame 2, and a positioning rod 4 is fixedly connected to the top of the support frame 3 and inserted into the inner hole of the connecting rod 5. The small head of the connecting rod 5 is placed in the connecting rod positioning frame 2 vertically, and then the connecting rod body is placed on the support frame 3 and is positioned by the positioning rod 4, so that the connecting rod 5 can be effectively fixed.

[0019] A rubber positioning ring 14 is sleeved on the surface of the inflation air bag 12 to tightly hold the inflation air bag 12 and make it expand outward to expand the bushing 13.

[0020] An upper pressing block 7 is fixedly connected to the surface of the press -fitting head 6, a positioning groove 8 adapted to the surface of the connecting rod 5 is arranged at the bottom of the upper pressing block 7, and an insertion groove 9 for the positioning rod 4 to pass through is arranged in the inner cavity of the upper pressing block 7. The upper pressing block 7 and the positioning groove 8 are used for positioning to prevent the upper pressing block 7 from warping and deforming under the pressure of the press -fitting head 6.

[0021] The compression ring 15 is circumferentially sleeved on the surface of the compression head 6, and the bushing 13 expanded by the air bag 12 is quickly compressed and connected on the small head of the connecting rod 5 by the downward movement of the compression ring 15. The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as they do not deviate from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A connecting rod press assembly assembly line comprising a bushing press (1), characterized in that: The surface of the bushing press fitting machine (1) is provided with a limiting assembly for limiting the connecting rod (5), the surface of the bushing press fitting machine (1) is slidably connected with a press fitting head (6) driven by a hydraulic mechanism, the surface of the bushing press fitting machine (1) is movably connected with a bushing conveying belt which can move left and right and is driven by a driving mechanism, the inner cavity of the press fitting head (6) is provided with an abutting groove (11) matched with the small head of the connecting rod (5), the surface of the press fitting head (6) is slidably connected with a press ring (15) driven by a gas cylinder, and the surface of the press fitting head (6) is surrounded by an expansion air bag (12) which is supplied with gas through a gas pipe (10) and abuts against the inner cavity of the bushing (13).

2. A connecting rod press assembly line according to claim 1, characterized in that: The limiting assembly comprises a connecting rod positioning frame (2) fixed on the surface of the bushing press fitting machine (1), one side of the connecting rod positioning frame (2) is fixedly connected with a supporting frame (3) abutting against the surface of the connecting rod body, and the top of the supporting frame (3) is fixedly connected with a positioning rod (4) inserted into the inner hole of the connecting rod (5).

3. A connecting rod press assembly line according to claim 1, characterized in that: The surface of the expansion air bag (12) is sleeved with a rubber positioning ring (14).

4. A connecting rod press assembly line as defined in claim 1 wherein: The surface of the press fitting head (6) is fixedly connected with an upper pressing block (7), the bottom of the upper pressing block (7) is provided with a positioning groove (8) matched with the surface of the connecting rod (5), and the inner cavity of the upper pressing block (7) is provided with an insertion groove (9) for the positioning rod (4) to penetrate.

5. A connecting rod press assembly line as defined in claim 1 wherein: The press ring (15) is circumferentially sleeved on the surface of the press fitting head (6).

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