阅读说明：本技术 一种单支撑的平衡轴结构 (Single-support balance shaft structure ) 是由 阳洪宗 何化 梁德浦 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种单支撑的平衡轴结构,包括轴座和两个平行布置的平衡轴,两个所述平衡轴的中部插接在所述轴座上,两个所述平衡轴的前端设有齿轮,所述平衡轴的后端设有平衡块。本发明的单支撑的平衡轴结构,结构设计合理,属于发动机减震技术领域,结构简单,加工方便,可以有效降低整个部件的重量,同时也使结构简单化；同时减少了一处支撑润滑,降低润滑失效风险。(The invention discloses a single-support balance shaft structure which comprises a shaft seat and two balance shafts arranged in parallel, wherein the middle parts of the two balance shafts are inserted into the shaft seat, gears are arranged at the front ends of the two balance shafts, and balance blocks are arranged at the rear ends of the balance shafts. The single-support balance shaft structure is reasonable in structural design, simple in structure and convenient to machine, belongs to the technical field of engine damping, and can effectively reduce the weight of the whole part and simplify the structure; meanwhile, one part of the supporting lubrication is reduced, and the risk of lubrication failure is reduced.)

1. The utility model provides a balanced axle construction of single bracing, its characterized in that includes axle bed (1) and two parallel arrangement's balanced axle (2), two the middle part of balanced axle (2) is pegged graft on axle bed (1), two the front end of balanced axle (2) is equipped with gear (3), the rear end of balanced axle (2) is equipped with balancing piece (4).

2. A single-support balance shaft structure according to claim 1, wherein the middle part of the balance shaft (2) is provided with a bush (5) matched with the bearing hole of the shaft seat (1), and the middle part of the bearing hole of the shaft seat (1) is provided with an oil groove (6).

3. A singly supported balance shaft arrangement according to claim 2, characterized in that both ends of the shaft seat (1) are provided with two thrust plates (7) adapted to both ends of the bushing (5).

4. A single-support balance shaft structure according to claim 1, wherein the front end of the shaft seat (1) is provided with a gear chamber (8) with an open upper end, and the front end of the shaft seat (1) is provided with a gear cover (9) with an open upper end.

5. A single-support balance shaft structure according to claim 4, wherein the rear end of the shaft seat (1) is provided with a protective shell (10) extending axially backward, and the inner wall of the protective shell (10) is an inner revolution surface structure adapted to the outer wall of the balance weight (4).

6. A singly supported balance shaft construction according to any of claims 1 to 5 characterized in that the balance mass (4) comprises a sleeve (11) adapted to the rear end of the balance shaft (2) and a radially protruding eccentric mass (12) provided on one side of the sleeve (11).

7. A singly supported balance shaft construction according to claim 6 characterized in that the rear end of the eccentric mass (12) is provided with a counterweight (13).

8. A singly supported balance shaft construction according to claim 7 characterized in that said eccentric mass (12) and said counterweight mass (13) are of fan-shaped configuration.

9. A singly supported balance shaft arrangement according to claim 6, characterized in that the sleeve (11) is provided with a balance weight positioning pin (14) connected to the balance shaft (2).

10. A singly supported balance shaft arrangement according to claim 1, characterized in that the upper end of the shaft housing (1) is provided with a housing positioning pin (15).

Technical Field

The invention relates to the engine damping technology, in particular to a single-support balance shaft structure.

Background

With the increasing requirements of terminal customers on the NVH performance of the engine, the whole vehicle has the requirements of specially improving noise reduction and shock absorption during engine design.

At present, the engine industry has more applied balanced axle construction, but, current balanced axle construction uses biax bearing to support the balanced axle usually, and the structure is complicated, and weight is big, and the balanced axle of not being convenient for is installed on the engine organism and is arranged.

Disclosure of Invention

The present invention is directed to overcome some of the above-mentioned shortcomings of the prior art, and an object of the present invention is to provide a single-support balance shaft structure with easy installation and low weight.

In order to achieve the purpose, the invention provides a single-support balance shaft structure which comprises a shaft seat and two balance shafts arranged in parallel, wherein the middle parts of the two balance shafts are inserted into the shaft seat, the front ends of the two balance shafts are provided with gears, and the rear ends of the balance shafts are provided with balance blocks.

Furthermore, a bush matched with the bearing hole of the shaft seat is arranged in the middle of the balance shaft, and an oil groove is arranged in the middle of the bearing hole of the shaft seat.

Furthermore, two thrust plates which are matched with the two ends of the bushing are arranged at the two ends of the shaft seat.

As a further improvement, the front end of the shaft seat is provided with a gear chamber with an opened upper end, and the front end of the shaft seat is provided with a gear cover with an opened upper end.

Furthermore, a protective shell which extends axially backwards is arranged at the rear end of the shaft seat, and the inner wall of the protective shell is of an inner revolution surface structure which is matched with the outer wall of the balance block.

As a further improvement, the balance weight comprises a sleeve matched with the rear end of the balance shaft and an eccentric block which is arranged on one side of the sleeve and protrudes radially.

Furthermore, a balancing weight is arranged at the rear end of the eccentric block.

Furthermore, the eccentric block and the balancing weight are in fan-shaped structures.

Furthermore, the sleeve is provided with a balance block positioning pin connected with the balance shaft.

Furthermore, the upper end of the shaft seat is provided with a shaft seat positioning pin.

Advantageous effects

Compared with the prior art, the single-support balance shaft structure has the following beneficial effects:

1) the single-support balance shaft structure can improve the NVH performance of the engine, the double balance shafts are installed according to the vibration noise source measuring point, the second-order reciprocating inertia force of the engine is balanced in a targeted manner, the inherent frequency is improved, and the engine and the whole vehicle structure are prevented from generating resonance;

2) compared with the double-support balance shaft applied in the market, the single-support balance shaft structure has the advantages of larger weight and structural cost, simpler structure, convenient processing, convenient arrangement of the engine body structure, effective reduction of the weight of the whole part and simplification of the structure; meanwhile, one part of the supporting lubrication is reduced, and the risk of lubrication failure is reduced.

Drawings

FIG. 1 is a structural cross-sectional view of a single support balance shaft configuration of the present invention;

fig. 2 is a structural perspective view of a single supported balance shaft structure of the present invention.

In the figure: 1. a shaft seat; 2. a balance shaft; 3. a gear; 4. a counterbalance; 5, lining the sleeve; 6. an oil sump; 7. a thrust plate; 8. a gear chamber; 9. a gear cover; 10. a protective shell; 11. a sleeve; 12. an eccentric block; 13. a balancing weight; 14. a balance block positioning pin; 15. axle seat locating pin.

Detailed description of the preferred embodiments

The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.

Specific embodiments of the present invention are such that: referring to fig. 1-2, a single-support balance shaft structure comprises a shaft seat 1 and two balance shafts 2 arranged in parallel, the middle parts of the two balance shafts 2 are inserted into the shaft seat 1, gears 3 are arranged at the front ends of the two balance shafts 2, balance blocks 4 are arranged at the rear ends of the two balance shafts 2, the balance shaft structure is installed according to a vibration noise source measuring point, and the rotation speed of the two balance shafts 2 is twice the rotation speed of a crankshaft, so that the second-order vibration of an engine can be eliminated. In the single-support balance shaft structure, only one shaft seat 1 is needed to support two balance shafts 2, the gears 3 and the balance blocks 4 at the two ends of the balance shafts 2 enable the stress of the balance shafts 2 to be concentrated in the middle, and the balance shafts 2 can be stably supported through the shaft seat 1, so that the stress balance of the balance shafts is ensured; compared with the double-support balance shaft applied to the market, the double-support balance shaft has the advantages of larger weight and structural cost, simpler structure and convenient processing, can effectively reduce the weight of the whole part, and simultaneously simplifies the structure; meanwhile, one part of the supporting lubrication is reduced, and the risk of lubrication failure is reduced.

In this embodiment, the middle of the balance shaft 2 is provided with a bush 5 matched with the bearing hole of the shaft seat 1, the middle of the bearing hole of the shaft seat 1 is provided with an oil groove 6, the bush 5 is provided with an oil passing hole corresponding to the oil groove 6, lubricating grease is stored in the oil groove 6, and the lubricating grease flows to the contact surface of the bush 5 and the balance shaft 2 through the oil passing hole to lubricate the rotating balance shaft 2.

In this embodiment, two ends of the shaft seat 1 are provided with two thrust plates 7 adapted to two ends of the bushing 5, the thrust plates 7 limit the bushing 5, and meanwhile, the end surfaces of the gear 3 and the balance weight 4 can be prevented from touching the end surface of the shaft seat 1.

In this embodiment, the front end of the shaft seat 1 is provided with a gear chamber 8 with an open upper end, the front end of the shaft seat 1 is provided with a gear cover 9 with an open upper end, and a cavity between the gear chamber 8 and the gear cover 9 can store lubricating oil, so that the cooling and lubrication of the gear 3 and the balance shaft 2 are ensured.

In this embodiment, a protective shell 10 extending axially backward is disposed at the rear end of the shaft seat 1, and the inner wall of the protective shell 10 is an inner surface of revolution adapted to the outer wall of the balance weight 4.

In this embodiment, the balancing block 4 includes the sleeve 11 that matches with the rear end of the balance shaft 2 and the eccentric block 12 that radially protrudes and sets up that is equipped with in one side of sleeve 11, and the rear end of eccentric block 12 is equipped with the balancing weight 13, and the balancing weight 13 can be connected with eccentric block 12 detachable through screw or pin, can increase and decrease balancing weight 13 as required, satisfies the shock attenuation requirement of engine.

In this embodiment, the eccentric mass 12 and the weight member 13 are fan-shaped and can pass through.

In this embodiment, the sleeve 11 is provided with a balance weight positioning pin 14 connected to the balance shaft 2, and the balance weight 4 is quickly mounted by the balance weight positioning pin 14.

In this embodiment, the upper end of the shaft seat 1 is provided with a shaft seat positioning pin 15, and the shaft seat 1 is quickly connected with the engine cylinder block through the shaft seat positioning pin 15.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.