CN213117338U

CN213117338U - Crankshaft connecting rod assembly

Info

Publication number: CN213117338U
Application number: CN202021140522.9U
Authority: CN
Inventors: 詹裕华; 葛家乐
Original assignee: Suzhou Yuhua Piston Pin Factory
Current assignee: Suzhou Yuhua Piston Pin Factory
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-05-04
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a crankshaft connecting rod assembly relates to engine technical field, for solving the problem that current crankshaft connecting rod assembly easily weares and teares. Be provided with the bent axle round pin between left side crank and the right crank, and bent axle round pin and the equal fixed connection of left side crank and right crank, the connecting rod stub is installed to the one end of bent axle connecting rod, the connecting rod stub is installed to the other end of bent axle connecting rod, and bent axle connecting rod and the equal fixed connection of connecting rod stub and connecting rod stub, the inboard of piston is provided with the pinhole, the internally mounted of pinhole has the piston pin, the piston pin runs through the connecting rod stub, install first bearing between piston pin and the pinhole, install the abrasionproof gasket between connecting rod stub and the pinhole, the outside both sides of piston pin all are provided with the ring channel, spacing snap ring is all installed to the outside both sides of piston, and the inside of spacing snap ring embedding ring channel, install second bearing between bent axle round pin and the connecting rod.

Description

Crankshaft connecting rod assembly

Technical Field

The utility model relates to the technical field of engines, specifically a crankshaft connecting rod subassembly.

Background

The crank mechanism is the main motion mechanism of the engine. The function is to convert the reciprocating motion of the piston into the rotating motion of the crankshaft, and simultaneously convert the force acting on the piston into the torque output by the crankshaft to drive the automobile wheels to rotate. The crank-connecting rod mechanism consists of a piston set, a connecting rod set, a crankshaft, a flywheel set and other parts, and is used for providing a combustion place, converting the expansion pressure of gas generated after fuel combustion on the top of the piston into the torque of crankshaft rotation and continuously outputting power.

However, the existing crankshaft connecting rod assembly is prone to wear and therefore does not meet the existing requirements, and therefore a crankshaft connecting rod assembly is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crankshaft connecting rod subassembly to solve the current crankshaft connecting rod subassembly easy wearing and tearing problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a crankshaft connecting rod assembly comprises a crankshaft connecting rod, a left crank, a right crank and a piston, wherein a crankshaft pin is arranged between the left crank and the right crank and fixedly connected with the left crank and the right crank, a large connecting rod head is arranged at one end of the crankshaft connecting rod, a small connecting rod head is arranged at the other end of the crankshaft connecting rod and fixedly connected with the large connecting rod head and the small connecting rod head, a pin hole is formed in the inner side of the piston, a piston pin is arranged in the pin hole and penetrates through the small connecting rod head, a first needle bearing is arranged between the piston pin and the pin hole, an anti-abrasion gasket is arranged between the small connecting rod head and the pin hole, annular grooves are formed in the two sides of the outer portion of the piston pin, limiting clamping rings are arranged on the two sides of the outer portion of the piston and embedded into the annular grooves, and a second needle bearing is arranged between the crankshaft pin and the, and a bearing outer sheath is arranged outside the second needle bearing.

Preferably, the limiting snap ring is rotatably connected with the annular groove.

Preferably, the piston is connected with the limiting snap ring through a screw.

Preferably, the pin hole is connected with the piston in a welding mode.

Preferably, the piston pin extends through the piston.

Preferably, gaps are arranged between the big end of the connecting rod and the left crank and between the big end of the connecting rod and the right crank.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model has the advantages that the anti-abrasion gasket is arranged between the small end of the connecting rod and the pin hole, thereby reducing the mutual abrasion between the small end of the connecting rod and the pin hole on one hand, and playing the role of preliminary limit on the other hand, the position of the small end of the connecting rod is fixed, because the limiting snap rings at the two sides of the outer part of the piston are embedded into the annular groove, the piston pin can be further limited to realize the limit of the small end of the connecting rod, and the limit snap ring and the annular groove can rotate mutually, so that the piston pin can rotate relative to the limit snap ring, the limit of the crankshaft connecting rod is realized by limiting the small end of the connecting rod, so that a gap is formed between the large end of the connecting rod at the lower end of the crankshaft connecting rod and the left crank and the right crank, in the transmission process, the big end of the connecting rod of the crankshaft connecting rod is not contacted with the left crank and the right crank side plate, so that the abrasion between the crankshaft connecting rod and the left crank and the right crank is reduced, and the service life of the whole assembly is prolonged.

2. The utility model discloses a set up the bearing oversheath in second bearing's outside, reduce the wearing and tearing between connecting rod big head and the second bearing when not influencing the connecting rod big head and can be for bent axle round pin pivoted, because the bearing oversheath has higher wearability, can prolong second bearing's life to reduce the maintenance.

Drawings

Fig. 1 is an overall front view of a crankshaft connecting rod assembly according to the present invention;

FIG. 2 is a connection diagram of the piston and the small end of the connecting rod according to the present invention;

fig. 3 is a connection relationship diagram of the connecting rod big end and the crank pin of the present invention.

In the figure: 1. a crankshaft connecting rod; 2. a left crank; 3. a right crank; 4. a crankpin; 5. a big end of the connecting rod; 6. a small end of the connecting rod; 7. a piston; 8. a pin hole; 9. a piston pin; 10. a first needle bearing; 11. an anti-wear gasket; 12. an annular groove; 13. a limit snap ring; 14. a second needle bearing; 15. and a bearing outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: a crankshaft connecting rod assembly comprises a crankshaft connecting rod 1, a left crank 2, a right crank 3 and a piston 7, wherein a crankshaft pin 4 is arranged between the left crank 2 and the right crank 3, the crankshaft pin 4 is fixedly connected with the left crank 2 and the right crank 3, a connecting rod big end 5 is installed at one end of the crankshaft connecting rod 1, a connecting rod small end 6 is installed at the other end of the crankshaft connecting rod 1, the crankshaft connecting rod 1 is fixedly connected with the connecting rod big end 5 and the connecting rod small end 6, a pin hole 8 is formed in the inner side of the piston 7, a piston pin 9 is installed inside the pin hole 8, the piston pin 9 penetrates through the connecting rod small end 6, a first needle bearing 10 is installed between the piston pin 9 and the pin hole 8, an anti-abrasion gasket 11 is installed between the connecting rod small end 6 and the pin hole 8, annular grooves 12 are formed in two sides of the outer portion of the piston 9, limit snap rings 13 are installed, the crankshaft connecting rod 1 is limited by limiting the connecting rod small end 6, so that a gap exists between the connecting rod big end 5 at the lower end of the crankshaft connecting rod 1 and the left crank 2 and the right crank 3, in the transmission process, the connecting rod big end 5 of the crankshaft connecting rod 1 is not contacted with side plates of the left crank 2 and the right crank 3, so that the abrasion between the crankshaft connecting rod 1 and the left crank 2 and the right crank 3 is reduced, the second needle bearing 14 is arranged between the crank pin 4 and the connecting rod big end 5, the bearing outer sheath 15 is arranged outside the second needle bearing 14, the abrasion between the connecting rod big end 5 and the second needle bearing 14 is reduced while the rotation of the connecting rod big end 5 relative to the crank pin 4 is not influenced, and the service life of the second needle bearing 14 can be prolonged due to the higher abrasion resistance of the bearing outer sheath 15.

Further, a limit snap ring 13 is rotatably connected to the annular groove 12, and the piston pin 9 is rotatable relative to the piston 7.

Further, the piston 7 is connected with the limiting clamp ring 13 through screws, and therefore the piston is convenient to detach.

Furthermore, the pin hole 8 is connected with the piston 7 in a welding mode, the air tightness and the water tightness of the welding connection are good, the structural rigidity is high, and the structural integrity is good.

Further, the piston pin 9 penetrates through the piston 7, so that the piston pin 9 can be limited by the limit snap ring 13.

Further, all be provided with the space between connecting rod major part 5 and left crank 2 and the right crank 3, in transmission process, connecting rod major part 5 of bent axle connecting rod 1 does not contact with

left crank

2 and 3 curb plates of right crank to reduce the wearing and tearing between bent axle connecting rod 1 and left crank 2 and the right crank 3, prolong the life of whole subassembly.

The working principle is as follows: when the flywheel is used, the flywheel is installed on the right crank 3 in a taper manner, the threads are used for locking the flywheel, gas expansion pressure is acted on the piston 7 after fuel is combusted, heat energy generated by fuel combustion enables the piston 7 to reciprocate, the crankshaft connecting rod 1 enables power to act on the crankshaft pin 4, the crankshaft pin 4 drives the left crank 2 and the right crank 3 to rotate, the reciprocating motion of the piston 7 is converted into the rotating motion of the crankshaft, meanwhile, the force acting on the piston 7 is converted into torque output outwards by the crankshaft to drive the flywheel to rotate, the bearing outer sheath 15 is arranged outside the second needle bearing 14, abrasion between the connecting rod big head 5 and the second needle bearing 14 can be reduced while the connecting rod big head 5 can rotate relative to the crankshaft pin 4 is not influenced, the service life of the second needle bearing 14 can be prolonged due to the higher abrasion resistance of the bearing outer sheath 15, the needle-proof gasket 11 is arranged between the connecting rod small head 6 and the pin hole 8, on one hand, the mutual abrasion between the connecting rod small head 6 and the pin hole 8 is reduced, on the other hand, the preliminary limit function can be realized, the position of the small end 6 of the connecting rod is fixed, because the limiting snap rings 13 at the two sides of the outside of the piston 7 are embedded into the annular groove 12, the piston pin 9 can be further limited, the limit of the connecting rod small end 6 is realized, and the limit snap ring 13 and the annular groove 12 can rotate mutually, so that the piston pin 9 can rotate relative to the limit snap ring 13, the limit of the crankshaft connecting rod 1 is realized by limiting the connecting rod small end 6, so that a gap is formed between the connecting rod big end 5 at the lower end of the crankshaft connecting rod 1 and the left crank 2 and the right crank 3, in the transmission process, the connecting rod big end 5 of the crankshaft connecting rod 1 is not contacted with the side plates of the left crank 2 and the right crank 3, thereby reducing the abrasion among the crankshaft connecting rod 1, the left crank 2 and the right crank 3 and prolonging the service life of the whole assembly.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a crankshaft connecting rod subassembly, includes crankshaft connecting rod (1), left crank (2), right crank (3) and piston (7), its characterized in that: the crank pin (4) is arranged between the left crank (2) and the right crank (3), the crank pin (4) is fixedly connected with the left crank (2) and the right crank (3), the connecting rod big end (5) is installed at one end of the crankshaft connecting rod (1), the connecting rod small end (6) is installed at the other end of the crankshaft connecting rod (1), the crankshaft connecting rod (1) is fixedly connected with the connecting rod big end (5) and the connecting rod small end (6), the pin hole (8) is formed in the inner side of the piston (7), the piston pin (9) is installed inside the pin hole (8), the piston pin (9) penetrates through the connecting rod small end (6), the first needle bearing (10) is installed between the piston pin (9) and the pin hole (8), the anti-abrasion gaskets (11) are installed between the connecting rod small end (6) and the pin hole (8), and the annular grooves (12) are formed in two sides of the outer portion of the piston pin (, limiting clamping rings (13) are mounted on two sides of the outer portion of the piston (7), the limiting clamping rings (13) are embedded into the annular groove (12), a second needle bearing (14) is mounted between the crank pin (4) and the connecting rod big head (5), and a bearing outer sheath (15) is arranged on the outer portion of the second needle bearing (14).

2. A crankshaft connection rod assembly according to claim 1, wherein: and the limiting snap ring (13) is rotationally connected with the annular groove (12).

3. A crankshaft connection rod assembly according to claim 1, wherein: the piston (7) is connected with the limiting snap ring (13) through a screw.

4. A crankshaft connection rod assembly according to claim 1, wherein: the pin hole (8) is connected with the piston (7) in a welding mode.

5. A crankshaft connection rod assembly according to claim 1, wherein: the piston pin (9) penetrates the piston (7).

6. A crankshaft connection rod assembly according to claim 1, wherein: gaps are arranged among the connecting rod big head (5), the left crank (2) and the right crank (3).