CN212455354U

CN212455354U - Motorcycle crankshaft with built-in balance shaft

Info

Publication number: CN212455354U
Application number: CN202021049679.0U
Authority: CN
Inventors: 朱志坤
Original assignee: Jiangmen Longgu Machine Manufacturing Co ltd
Current assignee: Jiangmen Longgu Machine Manufacturing Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-02
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses a motorcycle crankshaft of built-in balance shaft, including the bent axle and with bent axle parallel arrangement's balance shaft, the bent axle includes left crank and right crank, left crank passes through the bent axle pin with right crank and is connected, be equipped with the connecting rod between left crank and the right crank, the connecting rod is located on the bent axle pin through bearing, the below of bent axle is located to the balance shaft, left crank is equipped with the driving gear, the one end that balance shaft and left crank correspond is equipped with driven gear, driving gear and driven gear meshing transmission, the middle part of balance shaft is equipped with the balancing weight of the eccentric settings in axle center of focus and balance shaft, the balancing weight is rotatable to be passed through between left crank and the right crank, the utility model discloses a connection structure of balance shaft and bent axle is compact, can reduce the whole volume of.

Description

Motorcycle crankshaft with built-in balance shaft

Technical Field

The utility model relates to a motorcycle bent axle field specifically relates to a motorcycle bent axle of built-in balance axle.

Background

The motorcycle engine can produce great vibration in the course of working, will use the balance shaft technique in order to alleviate vibrations under the general condition, the balance shaft technique is the wider technique of using among the motorcycle engine, and its simple structure is practical, can alleviate the whole car vibration of motorcycle effectively, improves the travelling comfort of driving, and current balance shaft and bent axle connection structure lead to the whole bulky of engine, and the outward appearance bulges the structure complicacy, the installation of being not convenient for.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a motorcycle bent axle of built-in balance axle, the balance axle of this bent axle and the connection structure of bent axle are compact, can reduce the whole volume of engine.

In order to solve the technical problem, the utility model discloses a technical scheme does:

a motorcycle crankshaft with a built-in balance shaft comprises a crankshaft and a balance shaft arranged in parallel with the crankshaft, wherein the crankshaft comprises a left crank and a right crank, the left crank is connected with the right crank through a crankshaft pin, a connecting rod is arranged between the left crank and the right crank, the connecting rod is arranged on the crankshaft pin through a needle bearing, the balance shaft is arranged below the crankshaft, the left crank is provided with a driving gear, one end, corresponding to the left crank, of the balance shaft is provided with a driven gear, the driving gear is in meshing transmission with the driven gear, the middle of the balance shaft is provided with a balancing weight with the center of gravity eccentric with the axis of the balance shaft, and the balancing weight can rotate to pass through the space between the left crank and the right crank.

The utility model discloses a further improvement works as when the bent axle rotated to the peak, the balance shaft was located left side crank with between the right crank.

The utility model discloses a further improvement, the bent axle round pin middle part is equipped with straight oilhole, right side crank be equipped with the first oilhole of straight oilhole intercommunication.

The utility model discloses a further improvement, the both ends of straight oilhole are equipped with filter equipment.

The utility model discloses a further improvement, the cross-section of balancing weight is fan-shaped.

The utility model discloses a further improvement, the both ends of balanced axle are equipped with balanced axle bearing.

Adopt above-mentioned technical scheme, the one end of left crank is located to driving gear and driven gear, and the parallel shaft is installed on the bent axle the left side additional promptly, lets balance shaft and the same direction of ignition drive, and current parallel shaft is installed in the one end of right crank basically, promptly with the same direction of power take off accessory, leads to making the engine volume grow, and the outward appearance protrusion is not pleasing to the eye, the utility model discloses a design reducible engine space makes the outward appearance more pleasing to the eye, and the balancing weight is rotatable to pass through between left crank and the right crank, when the bent axle rotates to the peak, and the balance shaft is located between left crank and the right crank, and in the bent axle can be located to the balance shaft promptly for the connection structure of balance shaft and bent axle is compact.

Drawings

Fig. 1 is a schematic structural view of the present invention;

the following are marked in the figure: 1. a crankshaft; 2. a balance shaft; 3. a left crank; 4. a right crank; 5. a crankpin; 6. a connecting rod; 7. a driving gear; 8. a driven gear; 9. a balancing weight; 10. a straight oil hole; 11. a first oil hole; 12. a filtration device; 13. balance shaft bearing.

Detailed Description

As shown in the embodiment of the utility model in figure 1, a motorcycle crankshaft with a built-in balance shaft, comprising a crankshaft 1 and a balance shaft 2 arranged in parallel with the crankshaft 1, the crankshaft 1 comprises a left crank 3 and a right crank 4, the left crank 3 is connected with the right crank 4 through a crank pin 5, a gap exists between the left crank 3 and the right crank 4, the crank pin 5 is arranged in the gap, the crank pin 5 enables the left crank 3 and the right crank 4 to form a whole, a connecting rod 6 is arranged between the left crank 3 and the right crank 4, the connecting rod 6 is arranged on the crank pin 5 through a needle bearing, the connecting rod 6 is rotationally connected with the crankshaft 1, thereby the vertical reciprocating motion of a piston is converted into the rotation of the balance shaft 2 through the connecting rod 6, the balance shaft 2 is arranged below the crankshaft 1, the left crank 3 is provided with a driving gear 7, one end of the balance shaft 2 corresponding to the left crank 3 is provided with a driven gear 8, the driving gear 7, the crankshaft 1 drives the balance shaft 2, so that the balance shaft 2 and the crankshaft 1 synchronously rotate in opposite directions, the driving gear 7 and the driven gear 8 are arranged at one end of the left crank 3, namely the parallel shaft is additionally arranged at the left side of the crankshaft 1, so that the balance shaft 2 and the ignition drive have the same direction, the existing parallel shaft is basically arranged at one end of the right crank 4, namely the parallel shaft and the power output accessory have the same direction, so that the volume of the engine is enlarged, the appearance is not attractive, the design of the utility model can reduce the space of the engine, the appearance is more attractive, the middle part of the balance shaft 2 is provided with the balancing weight 9 with the gravity center eccentric with the axle center of the balance shaft 2, the cross section of the balancing weight 9 is fan-shaped, because the rotating direction of the balance shaft 2 is opposite to the crankshaft 1, the inertia force generated when the balancing weight 9 rotates can be offset with the inertia force generated by the crankshaft 1, so as to slow down the, when the crankshaft 1 rotates to the highest point, the balance shaft 2 is arranged between the left crank 3 and the right crank 4, namely the balance shaft 2 can be arranged in the crankshaft 1, so that the connecting structure of the balance shaft 2 and the crankshaft 1 is compact, the size of an engine can be reduced, and the balance shaft bearings 13 are arranged at two ends of the balance shaft 2 to ensure that the balance shaft 2 rotates stably.

5 middle parts of bent axle round pin are equipped with straight oilhole 10, right crank 4 is equipped with the first oilhole 11 with straight oilhole 10 intercommunication, pour into lubricating oil from the 4 tip of right crank, lubricating oil gets into straight oilhole 10 through first oilhole 11, then straight oilhole 10 flows out and lubricates bearing, the maintenance of being convenient for, the both ends of straight oilhole 10 are equipped with filter equipment 12, filter equipment 12 can filter impurity such as bent axle 1 iron fillings that produce at the rotation in-process, it rubs when preventing that it from getting into bearing and leading to its rotation, lead to the bearing to damage.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a motorcycle bent axle of built-in balance shaft, includes bent axle (1) and with bent axle (1) parallel arrangement's balance shaft (2), its characterized in that: the crankshaft (1) comprises a left crank (3) and a right crank (4), the left crank (3) is connected with the right crank (4) through a crank pin (5), a connecting rod (6) is arranged between the left crank (3) and the right crank (4), the connecting rod (6) is arranged on the crank pin (5) through a needle bearing, the balance shaft (2) is arranged below the crank shaft (1), the left crank (3) is provided with a driving gear (7), one end, corresponding to the left crank (1), of the balance shaft (2) is provided with a driven gear (8), the driving gear (7) is in meshing transmission with the driven gear (8), the middle of the balance shaft (2) is provided with a balancing weight (9) with the center of gravity and the axis of the balance shaft (2) eccentrically arranged, and the balancing weight (9) can rotate to pass through the space between the left crank (3) and the right crank (4).

2. A motorcycle crankshaft with built-in balance shaft according to claim 1, wherein: when the crankshaft (1) rotates to the highest point, the balance shaft (2) is arranged between the left crank (3) and the right crank (4).

3. A motorcycle crankshaft with built-in balance shaft according to claim 1, wherein: the middle of the crank pin (5) is provided with a straight oil hole (10), and the right crank (4) is provided with a first oil hole (11) communicated with the straight oil hole (10).

4. A motorcycle crankshaft with built-in balance shaft according to claim 3, wherein: and two ends of the straight oil hole (10) are provided with filtering devices (12).

5. A motorcycle crankshaft with built-in balance shaft according to claim 1, wherein: the section of the balancing weight (9) is fan-shaped.

6. A motorcycle crankshaft with built-in balance shaft according to claim 1, wherein: and balance shaft bearings (13) are arranged at two ends of the balance shaft (2).