CN210623374U

CN210623374U - Balance weight improved crankshaft

Info

Publication number: CN210623374U
Application number: CN201921598707.1U
Authority: CN
Inventors: 张军粱; 干永良
Original assignee: Anhui Yiheng Machinery Co ltd
Current assignee: Anhui Yiheng Machinery Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-26
Anticipated expiration: 2029-09-25

Abstract

The utility model provides a balancing piece improved generation bent axle, including front end axle, rod journal, main shaft journal and rear end axle, the front end axle with be connected with a plurality of main shaft journals and a plurality of rod journal between the rear end axle. In the utility model, the weight reduction of the crankshaft on one side of the crankshaft connecting rod neck is mainly considered under the common condition of weight reduction of the crankshaft, and the weight reduction effect can be achieved simultaneously under the condition of meeting the crankshaft balance rate by reducing the weight on one side of the crankshaft connecting rod neck; be provided with the balancing piece through the free end at the bent axle circular bead, and the shock attenuation groove has been seted up to the inboard of balancing piece, and the width of shock attenuation groove is 1/4 of balancing piece width, the shock attenuation groove top is provided with the swash plate, the width of swash plate is the 1/4 of shock attenuation groove width, the bottom of shock attenuation groove still is provided with first arc portion and second arc portion simultaneously, and the opposite direction of seting up of two arc portions, through the concave surface state that changes the primary plane state into the shock attenuation groove, can increase the intensity of bent axle at the during operation, the weight of bent axle has been alleviateed.

Description

Balance weight improved crankshaft

Technical Field

The utility model relates to a bent axle field especially relates to a balancing piece improved generation bent axle.

Background

The crankshaft is the most important component in the engine. It takes the force from the connecting rod and converts it into torque to be output by the crankshaft and drive other accessories on the engine. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well.

In order to reduce the mass of the crankshaft and the centrifugal forces occurring during its movement, the crankshaft journals are often hollow. Oil holes are opened on each journal surface to introduce or withdraw oil for lubricating the journal surface. In order to reduce stress concentration, the joints of the main journal, the crank pin and the crank arm are connected by transition arcs.

The weight reduction of the crankshaft is mainly considered on one side of a crankshaft connecting rod neck under the general condition of crankshaft weight reduction, the weight reduction effect can be achieved on the condition that the crankshaft balance rate is met by reducing the weight on one side of the crankshaft connecting rod neck, and the main mode of reducing the weight on one side of the connecting rod neck is to adopt a weight reduction groove with a hollow structure in the connecting rod neck. But the negative impact who brings like this is also great, because connecting rod neck cavity adopts concentric circles, then its downside more is close to crankshaft crank's dangerous cross-section, can lead to the rigidity and the intensity of bent axle all to have great decline like this, consequently the utility model discloses provide a balancing piece improved generation bent axle according to above-mentioned problem, with lightening hole setting convenient to detach and change on the detachable balancing piece, improve its flexibility and practicality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a balancing piece improved generation bent axle to solve above-mentioned technical problem.

The utility model discloses a solve above-mentioned technical problem, adopt following technical scheme to realize: the utility model provides a balancing piece improved generation bent axle, includes front end axle, connecting rod journal, main journal and rear end axle, its characterized in that:

a plurality of main journals and a plurality of connecting rod journals are connected between the front end shaft and the rear end shaft, the main journals and the connecting rod journals are arranged in a staggered mode, the main journals are used for connecting the two connecting rod journals, and the directions of the two adjacent connecting rod journals are opposite;

the crankshaft shaft neck comprises a crankshaft shoulder a, a crankshaft shoulder b, a crankshaft shaft neck and a balance block, wherein an installation part is arranged between the crankshaft shoulder a and the crankshaft shoulder b and at the position above the crankshaft shoulder a and the crankshaft shoulder b, the crankshaft shaft neck is connected between the two installation parts, and the free end of the crankshaft shoulder a is connected with the balance block;

wherein, the inner side of the balance weight, namely the side opposite to the crankshaft shoulder b, is provided with a damping groove.

Preferably, the structure of the shock absorption groove is a concave structure.

Furthermore, the structure of shock attenuation groove is indent formula structure, and non-hollow structure reduces the risk that the bent axle takes place negative effects at the course of the work.

Preferably, the thickness of the outermost vertical surface and the innermost vertical surface of the damping groove is 1/4 of the thickness of the balance weight.

Furthermore, the thickness of damping groove is 1/4 of balancing piece thickness promptly, then surperficial damping groove is indent formula structure, non-hollow structure, and thickness is 1/4, can guarantee the stability and the performance of balancing piece.

Preferably, the top of the damping groove is provided with an inclined plate connected with the side wall of the balance block, the bottom of the damping groove is provided with a first arc-shaped part and a second arc-shaped part which are connected with the side wall of the balance block, and the directions of the first arc-shaped part and the second arc-shaped part are opposite.

Preferably, the width of the inclined plate is 1/4 of the width of the shock absorption groove.

Preferably, the side structure of the damping groove may be a trapezoid-like structure.

The utility model has the advantages that:

in the utility model, the weight reduction of the crankshaft on one side of the crankshaft connecting rod neck is mainly considered under the common condition of weight reduction of the crankshaft, and the weight reduction effect can be achieved simultaneously under the condition of meeting the crankshaft balance rate by reducing the weight on one side of the crankshaft connecting rod neck; be provided with the balancing piece through the free end at the bent axle circular bead, and the shock attenuation groove has been seted up to the inboard of balancing piece, and the width of shock attenuation groove is 1/4 of balancing piece width, the shock attenuation groove top is provided with the swash plate, the width of swash plate is the 1/4 of shock attenuation groove width, the bottom of shock attenuation groove still is provided with first arc portion and second arc portion simultaneously, and the direction of seting up of two arc portions is opposite, concave surface state through changing the primary plane state into the shock attenuation groove, can increase the intensity of bent axle at the during operation, the weight of bent axle has been alleviateed, secondly, the shock attenuation groove sets up on the balancing piece, the balancing piece sets up on the bent axle circular bead, because the balancing piece is for dismantling the connection on the bent axle circular bead, then not equidimension bent axle circular bead, can install the balancing piece.

Drawings

Fig. 1 is a schematic structural view of an improved crankshaft of a balance weight according to the present invention;

FIG. 2 is a schematic structural view of the connecting rod journal of the present invention;

fig. 3 is a schematic side view of the crankshaft shoulder a of the present invention;

reference numerals: 1. a front end shaft; 2. a connecting rod journal; 201. a crankshaft shoulder a; 202. a crankshaft connecting rod journal; 203. a crankshaft shoulder b; 204. a damping groove; 2041. a sloping plate; 2042. a first arcuate portion; 2043. a second arcuate portion; 205. a counterbalance; 206. an installation part; 3. a main journal; 4. a rear end shaft.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 3, a balance block improved crankshaft comprises a front end shaft 1, connecting rod journals 2, main journals 3 and a rear end shaft 4, wherein a plurality of main journals 3 and a plurality of connecting rod journals 2 are connected between the front end shaft 1 and the rear end shaft 4, the main journals 3 and the connecting rod journals 2 are arranged in a staggered manner, the main journals 3 are used for connecting two connecting rod journals 2, and the directions of two adjacent connecting rod journals 2 are opposite;

the connecting rod journal 2 comprises a crankshaft shoulder a201, a crankshaft shoulder b203, a crankshaft connecting rod journal 202 and a balance block 205, a mounting part 206 is arranged between the crankshaft shoulder a201 and the crankshaft shoulder b203 and at an upper position, the crankshaft connecting rod journal 202 is connected between the two mounting parts 206, and the free end of the crankshaft shoulder a201 is connected with the balance block 205;

the inner side of the balance weight 205, i.e. the side opposite to the crankshaft shoulder b203, is provided with a damping groove 204.

The shock absorbing groove 204 is concave. The thickness of the outermost vertical surface and the innermost vertical surface of the shock absorption groove 204 is 1/4 of the thickness of the balance weight 205. The top of the damping groove 204 is provided with an inclined plate 2041 connected with the side wall of the balance weight 205, the bottom of the damping groove 204 is provided with a first arc-shaped part 2042 and a second arc-shaped part 2043 connected with the side wall of the balance weight 205, wherein the first arc-shaped part 2042 and the second arc-shaped part 2043 are opposite in direction. The sloping plate 2041 has a width 1/4 corresponding to the groove width of the shock absorbing groove 204. The side structure of the damping groove 204 may be a trapezoid-like structure.

In the utility model, a balance block 205 is arranged on one crankshaft shoulder inside a group of connecting rod bent necks 2, a damping groove 204 is arranged on the inner side of the balance block 205, namely, one side facing to the other crankshaft shoulder, the damping groove 204 is of an inward concave structure, and the thickness of the inward concave is 1/4 of the thickness of the balance rod 205, so that the weight reduction effect on the crankshaft can be realized, and meanwhile, the balance block cannot be damaged by adopting the inward concave structure;

wherein the inboard top of shock attenuation groove 204 is provided with swash plate 2041, then the width of swash plate 2041 is 1/4 of shock attenuation groove 204 groove width, wherein the side of shock attenuation groove 204 is class trapezium structure, the bottom of shock attenuation groove 204 is provided with two arc portions, then through the design of special concave type structure, wherein the bottom of shock attenuation groove 204 is close to crankshaft shoulder installation department 206 position department and adopts the concave structure, as shown in fig. 3, then when the bent axle rotates, can carry out certain weight reduction to the bent axle and handle, be favorable to improving of bent axle performance.

In the utility model, the damping groove 204 is arranged on the balance block 205, and the balance block 205 is detachably connected with the crankshaft, which is the prior art and is not explained much, therefore, crankshafts with different sizes need to use different damping grooves 204, and the shape of the damping groove 204 can be changed according to the different crankshafts, thereby having higher flexibility,

in the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a balancing piece improved generation bent axle, includes front end axle (1), connecting rod journal (2), main journal (3) and rear end axle (4), its characterized in that:

a plurality of main journals (3) and a plurality of connecting rod journals (2) are connected between the front end shaft (1) and the rear end shaft (4), wherein the main journals (3) and the connecting rod journals (2) are arranged in a staggered manner, the main journals (3) are used for connecting two connecting rod journals (2), and the directions of two adjacent connecting rod journals (2) are opposite;

the connecting rod journal (2) comprises a crankshaft shoulder a (201), a crankshaft shoulder b (203), a crankshaft connecting rod journal (202) and a balance block (205), an installation part (206) is arranged between the crankshaft shoulder a (201) and the crankshaft shoulder b (203) at the upper position, the crankshaft connecting rod journal (202) is connected between the two installation parts (206), and the free end of the crankshaft shoulder a (201) is connected with the balance block (205);

wherein, the inner side of the balance weight (205), namely the side opposite to the crankshaft shoulder b (203), is provided with a damping groove (204).

2. The improved balance weight crankshaft of claim 1, wherein: the structure of the shock absorption groove (204) is a concave structure.

3. The improved balance weight crankshaft of claim 1, wherein: the thickness of the outermost vertical surface and the innermost vertical surface of the shock absorption groove (204) is 1/4 of the thickness of the balance weight (205).

4. The improved balance weight crankshaft of claim 1, wherein: the top of the damping groove (204) is provided with an inclined plate (2041) connected with the side wall of the balance block (205), the bottom of the damping groove (204) is provided with a first arc-shaped part (2042) and a second arc-shaped part (2043) and connected with the side wall of the balance block (205), and the directions of the first arc-shaped part (2042) and the second arc-shaped part (2043) are opposite.

5. The improved balance weight crankshaft of claim 4, wherein: the width of the sloping plate (2041) is 1/4 of the width of the shock absorption groove (204).

6. The improved balance weight crankshaft of claim 1, wherein: the side structure diagram of the damping groove (204) is a trapezoid-like structure.