CN213298570U

CN213298570U - High-strength connecting rod

Info

Publication number: CN213298570U
Application number: CN202021566034.4U
Authority: CN
Inventors: 夏宁; 史卫; 白哈罗
Original assignee: Ningbo Unior Forging Co ltd
Current assignee: Ningbo Unior Forging Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-05-28
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a high strength connecting rod, its technical scheme main points are including the microcephaly that connects gradually, pole body and major part, the lightening hole of rectangular shape is seted up along the length direction of self to the pole body, be equipped with corresponding internal thread on two longer pore walls of lightening hole, the lightening hole is equipped with the bracing piece with internal thread engagement, two tip tops of bracing piece are held in two longer pore walls of lightening hole, the width scope 2mm-5m of bracing piece, the bracing piece is including meshing in the internal screw thread, the external screw thread includes the end of screwing in and end of arranging as order with the screw in internal thread successively, the thickness of external screw thread is by screwing in end to terminal increase gradually, and terminal thickness is greater than internal screw thread pitch, reach the purpose of further strengthening connecting rod self structural strength on the basis that alleviates the connecting rod dead weight.

Description

High-strength connecting rod

Technical Field

The utility model relates to an automobile connecting rod, more specifically say, it relates to an automobile connecting rod of high strength.

Background

The connecting rod of the automobile is mainly made by forging, and mainly because the forged connecting rod has higher strength than a common cast connecting rod, the existing forged connecting rod has more metal materials and larger weight; because the rod body is a connecting part in the middle and the shearing space is larger, long-strip-shaped lightening holes are directly formed along the rod body of the connecting rod in the existing enterprises; however, there is a drawback in this design that when the weight-reducing holes are directly formed in the connecting rod, the rod portion of the connecting rod of the vehicle has poor supporting strength due to the absence of the supporting members on the weight-reducing holes, and the rod portion of the connecting rod is subjected to a large external force during operation, so that the damage rate of the connecting rod is increased, and the service life is also shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high strength connecting rod reaches on the basis that alleviates the connecting rod dead weight, further strengthens connecting rod self structural strength's purpose.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a high-strength connecting rod comprises a small head, a rod body and a large head which are connected in sequence, wherein the rod body is provided with a long-strip-shaped lightening hole along the length direction of the rod body, corresponding internal threads are arranged on two longer hole walls of the lightening hole, the lightening hole is provided with a supporting rod meshed with the internal threads, two end parts of the supporting rod are propped against the two longer hole walls of the lightening hole, and the width range of the supporting rod is 2mm-5 mm.

By adopting the technical scheme, the internal thread is formed on the longer hole wall of the lightening hole through the tapping tool, and then the supporting rod is screwed into the internal thread, so that the supporting rod is supported on the longer hole wall of the lightening hole, and 1, 2, 3, 4, 5, 6 or 7 supporting rods with the same magnitude can be arranged in a single lightening hole. This design advantage lies in, utilizes the bracing piece that the later stage added to increase the support intensity of lightening hole to promote the structural strength of connecting rod by a wide margin, the connecting rod has high strength. The width range of the support rod is 2mm-5mm, so that the weight of the support rod can be reduced, and the increase of the weight of the connecting rod can be reduced under the aim of ensuring the structural strength of the support rod. Through a plurality of tests, the effect of ensuring the strength of the connecting rod by the supporting rod with the width range of 2mm-5mm is excellent. After the supporting rod is screwed into the internal thread, the joint can be welded by a welding rod.

Preferably, the support bar has a width of 3 mm.

Through adopting above-mentioned technical scheme, through many times experimental, the bracing piece of 3mm width guarantees that the effect of connecting rod intensity is comparatively excellent.

Preferably, the support rod comprises an external thread meshed with the internal thread, the external thread comprises a screwing end and a tail end which are sequentially arranged by screwing the internal thread, the thickness of the external thread is gradually increased from the screwing end to the tail end, and the thickness of the tail end is larger than the thread distance of the internal thread.

By adopting the technical scheme, in the design, after the thickness of the tail end is increased, the tail end is obviously clamped in the internal thread, so that the external thread is limited from being further screwed into the internal thread; the design limits the supporting rod to be further screwed in, thereby achieving the purpose of rotation limiting; the purpose of placing the external thread thickening position at the tail end is as follows: if the thickening position is arranged at the middle position, the meshing area of the external thread and the internal thread is small, and the connection stability of the support rod and the rod body is difficult to ensure; and the tail end is thickened, so that the large-area meshing position of the external thread and the internal thread can be ensured, and the connection stability of the support rod and the rod body can be ensured.

Preferably, a threaded hole pointing to the internal thread is drilled in the rod body, a barrier strip is connected to the threaded hole in a threaded mode, and the barrier strip is blocked on an external thread screwing-out path to limit the external thread to be screwed off the internal thread.

Through adopting above-mentioned technical scheme, the purpose of blend stop is in order to restrict the bracing piece and reverse circling round by a wide margin, avoids the bracing piece to reverse the condition emergence of back swing out of the pole body.

Preferably, the barrier abuts the end of the external thread.

Through adopting above-mentioned technical scheme, the blend stop is contradicted at the end, has then avoided supporting the reverse not hard up that circles round, and the combination of obviously blend stop and end thickening has formed the effect to the bracing piece location for location that the bracing piece can be stable is on the pole body.

Preferably, the thickness of the support rod along the length direction of the support rod gradually increases from two ends to the middle.

Through adopting above-mentioned technical scheme, the bracing piece is when receiving the pressure that comes from the pole body, and the intermediate position that the pressure transmission of its bracing piece both ends was to the bracing piece is concentrated, so the increase of intermediate position thickness makes the structural strength of bracing piece intermediate position promote to some extent for the structural strength of bracing piece further promotes, thereby has improved the holistic structural strength of connecting rod.

Preferably, two side surfaces of the supporting rod in the length direction are in arc shapes protruding outwards.

Through adopting above-mentioned technical scheme, circular-arc side is exactly the arch form in fact, and its purpose is in order to avoid the stress concentration of bracing piece for the structural strength of bracing piece further promotes, thereby has improved the holistic structural strength of connecting rod.

To sum up, the utility model discloses following beneficial effect has: the support rod is screwed in the lightening hole, so that the integral structural strength of the connecting rod is greatly improved; the bracing piece is comparatively tiny, is difficult to the synchronous forming when the connecting rod forging and pressing, so adopt the back built-up connection of this design can effectively improve this problem.

The connecting rod production and manufacturing technology is continuously improved, so that high-quality connecting rods are provided for various automobile manufacturers, and the competitiveness of the automobile brands in China is improved. The main body of the connecting rod can be completed by the following processes of blanking → medium frequency heating → roll forging blank making → die forging → punching and trimming → hot fine pressing → temperature control and cooling → shot blasting → semi-finished product inspection → vortex separation → flaw detection → rust prevention, and a plurality of precise processes can effectively ensure that the connecting rod with high quality is obtained.

Drawings

FIG. 1 is a schematic top view of an embodiment connecting rod;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic structural view of the support rod of the embodiment when the support rod is screwed clockwise to the internal thread;

fig. 4 is a schematic view of fig. 3 showing the longitudinal structure of the support rod as viewed from B.

In the figure:

11. a small end; 12. a shaft body; 13. a big end;

2. lightening holes; 21. longer hole walls; 22. an internal thread;

3. a support bar; 4. an external thread; 41. screwing in the end; 42. a terminal end;

51. a threaded hole; 52. and (6) blocking strips.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, the high-strength connecting rod comprises a small head 11, a rod body 12 and a large head 13 which are connected in sequence, wherein the rod body 12 is provided with a long strip-shaped lightening hole 2 along the length direction of the rod body, the lightening hole 2 is a waist round hole, and the lightening hole 2 is formed by forging the rod body 12.

Arc gaps which are symmetrically arranged are formed in two longer hole walls 21 of the lightening hole 2, internal threads 22 are arranged in the arc gaps, and the internal threads 22 are arranged in pairs. At least 2 pairs of internal threads 22 are arranged on the lightening holes 2; the lightening hole 2 is provided with a support rod 3, the support rod 3 is provided with two end parts, the two end parts are provided with external threads 4, the external threads 4 only have 1/4 circular arcs, and the external threads 4 can be meshed with the internal threads 22; in fig. 2 and 3, when the support rod 3 rotates clockwise in the lightening hole 2, the external threads 4 at the two ends of the support rod 3 are screwed into the paired internal threads 22 in the lightening hole 2, so that the support rod 3 and the rod body 12 are fixed by threads; the width of the support bar 3 is 3 mm.

The support rod 3 comprises an external thread 4 meshed with the internal thread 22, the external thread 4 comprises a screwing end 41 and a tail end 42 which are sequentially arranged by screwing in the internal thread 22, the thickness of the external thread 4 is gradually increased from the screwing end 41 to the tail end 42, and the thickness of the tail end 42 is larger than the thread pitch of the internal thread 22.

A through hole is drilled in the side face of the rod body 12 through a drill bit, threads are tapped on the through hole, a threaded hole 51 pointing to the internal thread 22 is formed in the through hole, and a stop strip 52 is connected to the threaded hole 51 in a threaded mode; the barrier strip 52 extends into the lightening hole 2, and the barrier strip 52 blocks the screwing-out path of the external thread 4 to limit the external thread 4 from screwing off the internal thread 22; when the brace 3 is screwed into the shaft 12, the stop strip 52 abuts the end 42 of the external thread 4.

The thickness of the support rod 3 along the length direction of the support rod gradually increases from two ends to the middle; the two side surfaces of the support rod 3 in the length direction are in the shape of an arc protruding outwards.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a high strength connecting rod, includes microcephaly (11), pole body (12) and major part (13) that connect gradually, characterized by: the bar body (12) is provided with a long-strip-shaped lightening hole (2) along the length direction of the bar body, two longer hole walls (21) of the lightening hole (2) are provided with corresponding internal threads (22), the lightening hole (2) is provided with a supporting bar (3) meshed with the internal threads (22), two end parts of the supporting bar (3) are propped against the two longer hole walls (21) of the lightening hole (2), and the width range of the supporting bar (3) is 2-5 mm.

2. The high strength connecting rod of claim 1, wherein: the width of the support rod (3) is 3 mm.

3. The high strength connecting rod of claim 1, wherein: the supporting rod (3) comprises an external thread (4) meshed with the internal thread (22), the external thread (4) comprises a screwing end (41) and a tail end (42) which are sequentially arranged by screwing the internal thread (22), the thickness of the external thread (4) is gradually increased from the screwing end (41) to the tail end (42), and the thickness of the tail end (42) is larger than the thread distance of the internal thread (22).

4. The high strength connecting rod of claim 3, wherein: a threaded hole (51) pointing to the internal thread (22) is drilled in the rod body (12), a blocking strip (52) is connected to the threaded hole (51) in a threaded mode, and the blocking strip (52) is blocked on a screwing-out path of the external thread (4) to limit the external thread (4) to unscrew the internal thread (22).

5. The high strength connecting rod of claim 4, wherein: the stop strip (52) abuts against the end (42) of the external thread (4).

6. The high strength connecting rod of claim 1, wherein: the thickness of the support rod (3) along the length direction of the support rod is gradually increased from two ends to the middle.

7. The high strength connecting rod of claim 6, wherein: the two side surfaces of the supporting rod (3) in the length direction are in arc shapes protruding outwards.