CN218953798U

CN218953798U - Crankshaft structure

Info

Publication number: CN218953798U
Application number: CN202320078103.4U
Authority: CN
Inventors: 李洪斌; 何超
Original assignee: Foshan Nanhai Fucheng Belting Industry Co ltd
Current assignee: Foshan Nanhai Fucheng Belting Industry Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-05-02
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a crankshaft structure, which comprises a plurality of shaft bodies and a plurality of connecting units, wherein the shaft bodies are coaxially arranged, one connecting unit is connected between two adjacent shaft bodies, the connecting unit comprises a pin shaft, a first crank and a second crank which are symmetrically arranged left and right, and the pin shaft is arranged in parallel with the shaft bodies; the pin shaft is detachably connected between the first crank and the second crank, and the first crank, the second crank and the pin shaft form a crank together; the first crank is fixedly connected with the shaft body on one side through the first inner expansion sleeve, and the second crank is fixedly connected with the shaft body on the other side through the second inner expansion sleeve. The utility model is suitable for the production of small-batch and large-size crankshafts, and has the advantages of simple structure, convenient assembly, strong universality and low cost.

Description

Crankshaft structure

Technical Field

The utility model relates to the technical field of crankshafts, in particular to a crankshaft structure.

Background

At present, the existing crankshaft manufacturing process generally adopts an integral casting or forging mode to manufacture a crankshaft blank, and then utilizes a special machine tool for the crankshaft to process, but because the manufacturing process of the crankshaft blank needs to use a special die and the processing needs a special machine tool and a fixture, the production mode is difficult to be suitable for the production of small-batch (single-piece) and large-size crankshafts.

Disclosure of Invention

The utility model aims to provide a crankshaft structure which is simple in structure, convenient to assemble, high in universality and low in cost, and can be suitable for production of crankshafts with small batch and large size.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the crankshaft structure comprises a plurality of shaft bodies and a plurality of connecting units, wherein the shaft bodies are coaxially arranged, one connecting unit is connected between two adjacent shaft bodies, the connecting unit comprises a pin shaft, a first crank and a second crank which are symmetrically arranged left and right, and the pin shaft is arranged in parallel with the shaft bodies; the pin shaft is detachably connected between the first crank and the second crank, and the first crank, the second crank and the pin shaft form a crank together; the first crank is fixedly connected with the shaft body on one side through the first inner expansion sleeve, and the second crank is fixedly connected with the shaft body on the other side through the second inner expansion sleeve.

As a preferable scheme of the utility model, the first crank and the second crank are respectively provided with a mounting hole for inserting the end part of the pin shaft.

As a preferable scheme of the utility model, the pin shaft is fixedly connected with the first crank and the pin shaft is fixedly connected with the second crank through taper pins.

As a preferable scheme of the utility model, pin holes for radially inserting the taper pins are formed in the first crank, the second crank and the pin shaft.

As a preferable scheme of the utility model, the first crank is fixedly provided with a first expansion sleeve seat, and the first inner expansion sleeve is arranged on the first expansion sleeve seat; the second crank is fixedly provided with a second expansion sleeve seat, and the second inner expansion sleeve is arranged on the second expansion sleeve seat.

As a preferable scheme of the utility model, the first crank is fixedly connected with the first expansion sleeve seat through a screw, and the second crank is fixedly connected with the second expansion sleeve seat through a screw.

As a preferable scheme of the utility model, the first expansion sleeve seat is provided with a plurality of first threaded holes which are uniformly arranged and can be connected by screw threads, and the first crank is provided with a plurality of first through holes corresponding to the first threaded holes; the second expansion sleeve seat is provided with a plurality of second threaded holes which are uniformly arranged and can be used for screw threaded connection, and the second crank is provided with a plurality of second through holes corresponding to the second threaded holes.

Compared with the prior art, the crankshaft structure provided by the utility model has the beneficial effects that:

in the production and manufacturing process, the number of the connecting units is set according to the process requirement, and a crankshaft blank is not required to be manufactured in an integral casting or forging mode, so that the method is suitable for the production of small-batch and large-size crankshafts and has the advantages of strong universality, convenience in assembly and lower cost; in addition, the inner expansion sleeve is used as a connecting piece between the shaft body and the crank, has high strength, stable and reliable connection and convenient adjustment, can better bear heavy load and transmit torque, and ensures the precision and rigidity of the crankshaft.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

FIG. 1 is a schematic diagram of a crankshaft structure according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a connection unit;

fig. 3 is a cross-sectional view taken in the direction A-A of the structure shown in fig. 2.

The marks in the figure:

a connection unit 100; a shaft body 11 (or 12); a pin 13; a first crank 14; a second crank 15; a first inner expansion shell 16; a second inner expansion shell 17; a mounting hole 2; taper pins 3; a first expansion socket 4; a second expansion sleeve seat 5; a screw 6; a first threaded hole 7; a first through hole 8; a second threaded hole 9; and a second through hole 10.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the utility model.

As shown in fig. 1 to 3, the preferred embodiment of the present utility model provides a crankshaft structure comprising a plurality of shaft bodies and a plurality of connection units 100, wherein the plurality of shaft bodies are coaxially arranged, one connection unit 100 is connected between two adjacent shaft bodies, the connection unit 100 comprises a pin shaft 13 and a first crank 14 and a second crank 15 which are symmetrically arranged on the left and right, and the pin shaft 13 is arranged in parallel with the shaft bodies; the pin shaft 13 is detachably connected between the first crank 14 and the second crank 15, and the first crank 14, the second crank 15 and the pin shaft 13 form a crank together; the first crank 14 is fixedly connected with the shaft body 11 at one side through the first inner expansion sleeve 16, and the second crank 15 is fixedly connected with the shaft body 12 at the other side through the second inner expansion sleeve 17. Wherein, the first inner expansion sleeve 16 and the first shaft body 11, and the second inner expansion sleeve 17 and the second shaft body 12 are connected without gaps.

Therefore, in the production and manufacturing process of the crankshaft structure, the number of the connecting units 100 is set according to the process requirement, and a crankshaft blank is not required to be manufactured in an integral casting or forging mode, so that the crankshaft structure can be suitable for the production of small-batch and large-size crankshafts and has the advantages of strong universality, convenience in assembly and lower cost; in addition, the inner expansion sleeve is used as a connecting piece between the shaft body and the crank, has high strength, stable and reliable connection and convenient adjustment, can better bear heavy load and transmit torque, and ensures the precision and rigidity of the crankshaft.

Illustratively, the first crank 14 and the second crank 15 are provided with mounting holes 2 for plugging the ends of the pin shaft 13, so that the pin shaft 13 and the crank can be conveniently assembled and disassembled.

The pin shafts 13 and the first crank 14, and the pin shafts 13 and the second crank 15 are connected and fixed by the taper pins 3, and the pin holes for radially inserting the taper pins 3 are formed in the first crank 14, the second crank 15 and the pin shafts 13. By means of the design, the pin shaft 13 can be fixed in the radial direction in the rotating process, and the pin shaft 13 is prevented from falling off from the first crank 14 and the second crank 15.

Illustratively, in order to facilitate the installation and fixation of the inner expansion shell, the first crank 14 is fixedly provided with a first expansion shell seat 4, and the first inner expansion shell 16 is installed on the first expansion shell seat 4; the second crank 15 is fixedly provided with a second expansion sleeve seat 5, and the second inner expansion sleeve 17 is arranged on the second expansion sleeve seat 5. The first crank 14 is fixedly connected with the first expansion sleeve seat 4 through the screw 6, and the second crank 15 is fixedly connected with the second expansion sleeve seat 5 through the screw 6, so that the connection mode is firm and reliable. Specifically, the first expansion socket 4 is provided with a plurality of first threaded holes 7 which are uniformly arranged and can be connected by screw threads 6, and the first crank 14 is provided with a plurality of first through holes 8 corresponding to the first threaded holes 7; the second expansion socket 5 is provided with a plurality of second threaded holes 9 which are uniformly arranged and can be connected with the screws 6 in a threaded manner, and the second crank 15 is provided with a plurality of second through holes 10 corresponding to the second threaded holes 9.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. The crankshaft structure is characterized by comprising a plurality of shaft bodies and a plurality of connecting units, wherein the shaft bodies are coaxially arranged, one connecting unit is connected between two adjacent shaft bodies, each connecting unit comprises a pin shaft, a first crank and a second crank which are symmetrically arranged left and right, and the pin shaft is arranged in parallel with the shaft bodies; the pin shaft is detachably connected between the first crank and the second crank, and the first crank, the second crank and the pin shaft form a crank together; the first crank is fixedly connected with the shaft body on one side through the first inner expansion sleeve, and the second crank is fixedly connected with the shaft body on the other side through the second inner expansion sleeve.

2. The crankshaft structure according to claim 1, wherein the first crank and the second crank are provided with mounting holes for inserting ends of the pin shafts.

3. The crankshaft structure of claim 2, wherein the pin shaft is fixed to the first crank and the pin shaft is fixed to the second crank by taper pin connection.

4. A crankshaft structure according to claim 3, wherein the first crank, the second crank and the pin shaft are provided with pin holes for radial insertion of the taper pins.

5. The crankshaft structure of claim 1, wherein the first crank is fixedly provided with a first expansion sleeve seat, and the first inner expansion sleeve is mounted on the first expansion sleeve seat; the second crank is fixedly provided with a second expansion sleeve seat, and the second inner expansion sleeve is arranged on the second expansion sleeve seat.

6. The crankshaft structure of claim 5, wherein the first crank is fixedly connected to the first expansion socket by a screw, and the second crank is fixedly connected to the second expansion socket by a screw.

7. The crankshaft structure according to claim 6, wherein the first expansion socket is provided with a plurality of first threaded holes which are uniformly arranged and can be connected by screw threads, and the first crank is provided with a plurality of first through holes corresponding to the first threaded holes; the second expansion sleeve seat is provided with a plurality of second threaded holes which are uniformly arranged and can be used for screw threaded connection, and the second crank is provided with a plurality of second through holes corresponding to the second threaded holes.