CN204843606U - Decorated archway is fixed to three -throw crankshaft - Google Patents

Abstract

The utility model relates to a three-turn crankshaft fixed archway, which comprises a base installed on the crank lathe, a support seat installed on one side of the upper surface of the base, and a top cover detachably installed on the top of the support seat. The first groove, the bottom of the top cover is provided with a second groove matching the first groove, the clamping assembly for clamping the three-flip crankshaft is installed in the first groove, and the center of the main shaft of the crankshaft lathe is located at the One side of the symmetry plane of the first groove. On the one hand, the matching first groove and the second groove are respectively provided on the support base and the top cover, and the clamping assembly is installed in the first groove, so as to realize the auxiliary clamping of the three-throw crankshaft; on the other hand The support seat is installed on one side of the upper surface of the base, and the center of the main shaft of the crank lathe is located on one side of the symmetry plane of the first groove, that is, the first groove and the main shaft of the crank lathe are set eccentrically, so that By virtue of this, the requirements for the stroke of the crankpin of the shaft processed by the machine tool are met.

Description

Three-turn crankshaft fixed archway

technical field

The utility model belongs to the field of mechanical processing, and relates to a crankshaft fixture, in particular to a three-turn crankshaft fixing archway.

Background technique

The three-throw crankshaft 1 shown in Figure 1 is a large integral crankshaft, including three crank pins 11 in the middle and a main journal 12 at the end, and the corresponding blank is forged with 42CrMo material; the total length of the three-throw crankshaft 1 is 2900mm, The weight is 3700kg, and the eccentricity of the crank pin 11 is 225mm. The three-throw crankshaft 1 has the characteristics of short stroke, light weight, complex structure, and difficult-to-process materials, etc. Specifically: 1. The three-throw crankshaft 1 is an integral crankshaft, and the forging factory does not have a special forging die, so it can only be forged according to conventional forgings , resulting in high forging difficulty, and the increase of the blank material, the blank cost increases accordingly, and also increases the processing cost; 2. The eccentricity of the three-throw crankshaft 1 is 225mm, and the minimum eccentricity of the crankpin for the commonly used crankshaft lathe is 500mm. Seriously beyond the processing range of the crankshaft lathe, if the crank pin is processed by using an ordinary lathe, because the weight of the finished crankshaft reaches 3700kg, after the offset is added, the load bearing of the ordinary lathe cannot meet the requirements; 3. The accuracy of the three-throw crankshaft 1 The requirements are very high, the journal tolerance of the main journal 12 and the crank pin 11 is: +0.08/+0.04mm, and the parallelism between the crank pin and the main journal is: 0.06mm. Ordinary lathe processing cannot guarantee the precision requirement of this shaft; 4, the structure of the three-throw crankshaft 1 is complicated, and the crankshaft main journal and the connecting section of the crank pin are all connected by a circular arc surface, and the crank pin 11 is easy to be damaged when the shoulder is actually processed. Greatly increased processing difficulty.

Although a special vertical fixed tooling 2 for the three-throw crankshaft 1 is designed, the tooling 2 is made of a piece of cylindrical steel, and a counterbore 21 is processed on the end face, and its aperture closely matches the size of the main journals at both ends of the crankshaft after semi-finishing. The hole position of the counterbore 21 is offset by 225 mm according to the center of the tooling (crankshaft crank pin eccentricity); the tooling 2 is set to process a straight edge 22 on the end face of the counterbore 21 (as shown in Figure 3). The connecting line of the center of the counterbore on which the crankshaft is installed is guaranteed to be parallel, which is used as the benchmark for adjustment on the machine tool after the crankshaft is installed. Since the eccentricity between the crankpin 11 and the main journal of the three-throw crankshaft 1 is 225 mm, and the minimum eccentricity of the crankpin 11 processed by the corresponding crankshaft lathe is 500 mm, it is necessary to design a crankshaft fixture to solve the above problems.

Contents of the invention

The purpose of the utility model is to provide a three-turn crankshaft fixed archway in order to overcome the deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a three-turn crankshaft fixed archway, which includes a base installed on the crank lathe, a support seat installed on one side of the upper surface of the base, and a detachably installed The top cover on the top of the support seat, the top of the support seat is provided with a first groove, the bottom of the top cover is provided with a second groove matching the first groove, and the inside of the first groove A clamp assembly for clamping the three-flip crankshaft is installed, and the center of the main shaft of the crankshaft lathe is located on one side of the symmetry plane of the first groove.

Preferably, the clamping assembly includes a bracket and two positioning rods, the bracket is vertically installed in the first groove and has an adjustable height; the positioning rod is symmetrical with the bracket as a symmetry axis It is installed in the first groove and its length deep into the first groove is adjustable.

Preferably, a reinforcing rib is connected between the base and the supporting seat.

Optimally, a lifting ring is also provided on the top of the base.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art: the utility model has a three-turn crankshaft to fix the archway, on the one hand, a matching first groove and a second groove are provided on the support seat and the top cover respectively. groove, and install the clamping assembly in the first groove, so as to realize the auxiliary clamping of the three-flip crankshaft; on the other hand, the support seat is installed on one side of the upper surface of the base, and the center of the main shaft of the crankshaft lathe is symmetrical to the first groove One side of the surface, that is, the first groove and the crankshaft lathe spindle are arranged eccentrically, which realizes borrowing from the direction of the crankshaft lathe circle stroke tool holder, and meets the requirements for the stroke of the crankpin of the shaft machined by the machine tool.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model three-turn crankshaft;

Accompanying drawing 2 is the structural representation of the fixed archway of the utility model three-turn crankshaft;

Among them, 1. three-turn crankshaft; 11. crank pin; 12. main journal; 2. tooling; 21. counterbore; 22. straight edge; 3. fixed archway; 31. base; 32. support seat; Groove; 33, reinforcing rib; 34, clamping assembly; 341, bracket; 342, positioning rod; 35, top cover; 351, second groove; 36, ring; 4, crankshaft lathe;

Detailed ways

The preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing:

The following definitions of directions are all defined according to the directions observed in FIG. 2 .

As shown in FIG. 2 , the fixed archway 3 with a three-turn crankshaft mainly includes a base 31 , a support seat 32 , a clamping assembly 34 and a top cover 35 .

Wherein, the base 31 is installed on the crank lathe 4; the support base 32 is installed on one side (left side) of the upper surface of the base 31, and its bottom is provided with a first groove 321; the top cover 35 is detachably installed on the support base 32 The top of the top, the bottom of which is provided with the second groove 351 matched with the first groove 321. The clamping assembly 34 is installed in the first groove 321, and is used to clamp the three-bend crankshaft 1 between the first groove 321 and the second groove 351, and at the same time, it is necessary to ensure that the symmetrical plane of the first groove 321 is located on the crankshaft. Left of center of lathe 4 spindles. In this way, the first groove 321 and the main shaft of the crank lathe are arranged eccentrically, which realizes borrowing from the direction of the tool rest of the crank lathe circle, and satisfies the requirements for the stroke of the crank pin of the machine tool.

In this embodiment, the clamping assembly 34 includes a bracket 341 and two positioning rods 342, the bracket 341 is vertically installed in the first groove 321, that is, installed in the center of the first groove 321, and its height It can be adjusted by bolts and nuts; the positioning rod 342 is symmetrically installed in the first groove 321 with the bracket 341 as the symmetrical axis, and the length of its penetration into the first groove 321 is adjustable, so as to ensure the precise fixing of the three-bend crankshaft 1 . A reinforcing rib 33 is connected between the base 31 and the supporting seat 32 . A suspension ring 36 is also provided on the top of the base 31 .

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present utility model, and its purpose is to allow those familiar with this technology to understand the content of the present utility model and implement it accordingly, and cannot limit the protection scope of the present utility model. Equivalent changes or modifications made according to the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims (4)

1. decorated archway fixed by a three-throw crankshaft, it is characterized in that: it comprises the base (31) be arranged on crankshaft toothed wheel (4), be arranged on the supporting seat (32) of described base (31) upper surface side and be removably mounted on the top cover (35) at described supporting seat (32) top, described supporting seat (32) top is provided with the first groove (321), described top cover (35) bottom is provided with the second groove (351) matched with described first groove (321), clamp assemblies (34) for clamping three-throw crankshaft (1) is installed in described first groove (321), the alignment of shafts (41) of described crankshaft toothed wheel (4) is positioned at the side of described first groove (321) plane of symmetry.

2. decorated archway fixed by three-throw crankshaft according to claim 1, it is characterized in that: described clamp assemblies (34) comprises bracket (341) and two backstays (342), described bracket (341) to be vertically arranged in described first groove (321) and height adjustable; Described backstay (342) with described bracket (341) for symmetry axis symmetry is arranged in described first groove (321) and it gos deep into the adjustable length of described first groove (321).

3. decorated archway fixed by three-throw crankshaft according to claim 1, it is characterized in that: be connected with reinforcement (33) between described base (31) and described supporting seat (32).

4. decorated archway fixed by three-throw crankshaft according to claim 1, it is characterized in that: described base (31) top is also provided with suspension ring (36).