CN221120215U

CN221120215U - Cam assembly, crank cam mechanism and air compressor

Info

Publication number: CN221120215U
Application number: CN202322410507.1U
Authority: CN
Inventors: 雷宇; 胡永雨
Original assignee: Shanghai Fuli'er Power Technology Co ltd
Current assignee: Shanghai Fuli'er Power Technology Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-06-11
Anticipated expiration: 2033-09-05

Abstract

Embodiments of the present utility model relate to a cam assembly, a crank cam mechanism, and an air compressor, the cam assembly including: the crank is provided with a tail end and a head end far away from the tail end along the axis direction of the crank; the number of the eccentric wheels is greater than two, each eccentric wheel is sequentially arranged along the axis direction of the crank, each eccentric wheel is eccentrically arranged with the crank, deflection angles are formed between every two adjacent eccentric wheels around the axis direction of the crank, and the angles of all deflection angles are the same. Compared with the prior art, the rotating motion of the crank can be changed into the reciprocating linear motion of the piston of each cylinder by each eccentric wheel, so that the air compressor can increase the number of the cylinders and the number of the crank cam mechanisms can not be increased, and therefore, the air compressor has smaller volume, and meanwhile, because only one crank cam mechanism of the air compressor is operated, the air compressor has better balance and stability, and unnecessary vibration of the air compressor during working is eliminated.

Description

Cam assembly, crank cam mechanism and air compressor

Technical Field

Embodiments of the present disclosure relate to air compression devices, and more particularly, to a cam assembly, a crank cam mechanism, and an air compressor.

Background

In a conventional internal combustion engine, reciprocating motion of a piston is converted into rotational motion of a crankshaft by a crank-link mechanism, and corresponding moving parts are driven by the crankshaft to output power to the outside. In the conventional air compressor, the rotary motion of the crankshaft is converted into the reciprocating linear motion of the piston by the crank cam mechanism, and the air in the cylinder is compressed by the piston. However, in the crank-link mechanism, if the compression of multiple cylinders is to be realized due to the existence of the links, multiple crank-link mechanisms are required to be arranged, so that the volume of the air compressor can be increased undoubtedly, the air compressor is heavy, the original balance of the air compressor can be damaged, and unnecessary vibration is caused.

Disclosure of utility model

The utility model aims to design a cam assembly, a crank cam mechanism and an air compressor, which not only can increase the number of air cylinders of the air compressor, but also can enable the air compressor to have smaller volume and better balance when the air compressor works.

To achieve the above object, an embodiment of the present utility model provides a cam assembly including:

A crank; the crank is provided with a tail end and a head end far away from the tail end along the axis direction;

the N eccentric wheels are sequentially arranged along the axial direction of the crank; wherein, N is a natural number greater than or equal to 3; each eccentric wheel is eccentrically arranged with the crank;

And deflection angles are formed between every two adjacent eccentric wheels around the axial direction of the crank, and the angles of the deflection angles are the same.

In addition, an embodiment of the present utility model also provides a crank-cam mechanism including:

a cam assembly as described above; the crank is provided with a shaft hole along the axis direction;

A crankshaft at least partially inserted into the shaft hole and coaxially fixed to the crank;

the output shaft is connected with one end of the crankshaft and is eccentrically arranged with the crankshaft;

the input shaft is connected with the other end of the crankshaft and is eccentrically arranged with the crankshaft;

wherein the output shaft and the input shaft are coaxially arranged.

In addition, an embodiment of the present utility model further provides an air compressor, including: crank cam mechanism, K cylinders as described above; wherein, K=2N, each cylinder is around the axis direction equidistance ring setting of output shaft or input shaft.

Compared with the prior art, the embodiment of the utility model has the advantages that the cam assembly of the crank cam mechanism comprises the crank and the eccentric wheels, the number of the eccentric wheels exceeds two, the eccentric wheels are sequentially arranged along the axis direction of the crank, meanwhile, deflection angles are formed between every two adjacent eccentric wheels around the axis direction of the crank, and the angles of the deflection angles are the same, so that each cylinder of the air compressor can be arranged in the same way as each eccentric wheel, namely, each cylinder of the air compressor can be circumferentially arranged around the crank in the axis direction of the crank in correspondence to each eccentric wheel, and the rotation of the crank can sequentially change the rotation motion of the crank into the reciprocating linear motion of the piston of each cylinder, so that the air compressor can not increase the number of the crank cam mechanisms while increasing the number of the cylinders, thereby enabling the air compressor to have smaller volume.

Drawings

FIG. 1 is an isometric view of a cam assembly in accordance with some embodiments of the utility model;

FIG. 2 is a cross-sectional view at A-A in FIG. 1;

FIG. 3 is a schematic view of an assembly of the retaining rings and first and second bearings in accordance with some embodiments of the present utility model;

FIG. 4 is an isometric view of a cam crank mechanism in some embodiments of the utility model;

FIG. 5 is a schematic front view of FIG. 4;

FIG. 6 is a cross-sectional view at B-B in FIG. 5;

Fig. 7 is a schematic axial view of an air compressor in accordance with some embodiments of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present utility model. The claimed utility model may be practiced without these specific details and with various changes and modifications based on the following embodiments.

Example 1

A first embodiment of the present utility model relates to a cam assembly, as shown in fig. 1 and 2, the cam assembly 1 comprising: a crank 11 and several eccentric wheels 12.

As shown in fig. 1 and 2, the crank 11 has a tail end 111 and a head end 112 distant from the tail end 111 in the axial direction thereof. The number of the eccentric wheels 12 is greater than two, the eccentric wheels 12 are sequentially arranged along the axis direction of the crank 11, meanwhile, each eccentric wheel 12 is eccentrically arranged with the crank 11, deflection angles are formed between every two adjacent eccentric wheels 12 around the axis direction of the crank 11, and the angles of the deflection angles are the same.

As can be seen from the above, since the cam assembly 1 comprises: the crank 11 and a plurality of eccentric wheels 12, and the quantity of eccentric wheels 12 exceeds two, and each eccentric wheel 12 is arranged along the axis direction of the crank 11 in turn. Every two adjacent eccentric wheels 12 form deflection angles around the axis direction of the crank 11, and the angles of the deflection angles are the same, so that each cylinder 2 of the air compressor can adopt the same arrangement mode as each eccentric wheel 12, namely, each cylinder of the air compressor can also be arranged around the crank around the axis direction of the crank in a surrounding manner, namely, the state shown in fig. 7, so that each eccentric wheel 12 can change the rotary motion of the crank 11 into the reciprocating linear motion of the piston of each cylinder. Therefore, the air compressor can increase the number of the air cylinders 2 without increasing the number of the crank cam mechanisms, so that the air compressor has smaller volume. Meanwhile, as the air compressor only has one crank cam mechanism to operate, the air compressor has better balance and stability, and unnecessary vibration of the air compressor during working is eliminated.

Specifically, in some embodiments, as shown in fig. 1 and 2, each eccentric 12 is disposed equidistantly along the axial direction of the crank 11. For example, as shown in fig. 1 and 2, the eccentric 12 may be provided with three such that the deflection angle between each adjacent two of the eccentric 12 is 120 degrees. As shown in fig. 7, six cylinders 2 may be disposed corresponding to each eccentric wheel 12, and six cylinders 2 may be disposed around the axis direction of the output shaft 4 or the input shaft 5 of the crank cam mechanism, and each two adjacent cylinders 2 have a deflection angle of 60 degrees around the axis direction of the output shaft 4 or the input shaft 5. Therefore, when the cylinders 2 are provided, the cylinders 2 may be grouped one by one, and each group of cylinders 2 is provided on the movement path of the same eccentric 12, so that when the crank 11 rotates, the eccentric 12 can change the rotational movement of the crank 11 to the reciprocating rectilinear movement of the pistons of the group of cylinders 2, thereby achieving the suction and compression of air. In addition, it should be noted that in the present embodiment, the eccentric wheels 12 are only illustrated by three examples, and in other examples, the number of the eccentric wheels 12 may be increased according to the usage situation, and after each eccentric wheel 12 is added, the number of the cylinders 2 may be correspondingly increased, so that the air compressor may have a larger air intake amount while the volume of the air compressor is not changed.

In addition, in order to be able to position the respective eccentric 12 on the crank 11, as shown in fig. 1 and 2, the cam assembly 1 further comprises: the plurality of positioning rings 13 are provided in order along the axial direction of the crank 11, and the number of positioning rings 13 is always one more than the number of eccentric gears 12. For example, as shown in fig. 1 and 2, when there are three eccentric wheels 12, there are four positioning rings 13, so that one eccentric wheel 12 can be detachably installed between every two adjacent positioning rings 13. Also, it is noted that, as shown in fig. 3, each positioning ring 13 has an inner ring surface 131 opposite to the crank 11, and an outer ring surface 132 distant from the crank 11. Meanwhile, the inner ring surface 131 of each positioning ring 13 is attached to the crank 11. For example, in some embodiments, as shown in fig. 1 and 2, each retaining ring 13 is disposed coaxially with the crank 11. It can thus be seen that by arranging the eccentric 12 between each adjacent two positioning rings 13, the positioning of the respective eccentric 12 on the crankshaft 11 can be achieved.

Also, as a preferred embodiment, in some embodiments, as shown in fig. 3, the eccentric 12 disposed between each adjacent two of the positioning rings 13 is fixed with the two positioning rings 13 by the positioning pins 15. For example, as shown in fig. 3, when the eccentric wheels 12 are provided with three and the positioning rings 13 are provided with four, each positioning ring 13 and each eccentric wheel 12 can be fixedly connected through a plurality of positioning pins 15, so that each positioning ring 13 and each eccentric wheel 12 can be integrated, and the stability of each eccentric wheel 12 in rotation is ensured.

Furthermore, in some embodiments, as shown in fig. 6, the cam assembly 1 further comprises: the first positioning component 16 and the second positioning component 17, and the first positioning component 16 and the second positioning component 17 are detachably arranged at two ends of the crank 11 along the axial direction of the crank 11, wherein the first positioning component 16 can be abutted with the positioning ring 13 arranged close to the tail end 111 of the crank 11, the second positioning component 17 can be abutted with the positioning ring 13 arranged close to the head end 112 of the crank 11, and the positioning rings 13 at two ends of the crank 11 are respectively abutted through the first positioning component 16 and the second positioning component 17, so that each positioning ring 13 and each eccentric wheel 12 can be fixed on the crank 11.

Specifically, in some embodiments, as shown in fig. 4 and 6, the first positioning assembly 16 includes: a first bearing 161 and a first bracket 162. Wherein the first bearing 161 includes: the first inner ring member 1611 sleeved on the crank 11, a first outer ring member 1612 coaxial with and opposite to the first inner ring member 1611, and a plurality of first rolling bodies 1613 distributed between the first inner ring member 1611 and the first outer ring member 1612, wherein the first inner ring member 1611 abuts against the positioning ring 13 disposed near the tail end 111 of the crank 11, and then the first bracket 162 is sleeved on the first outer ring member 1612 of the first bearing 161, so that the first bracket 162 can be used for supporting and fixing the first bearing 161. Also, in some embodiments, as shown in fig. 4 and 6, the second positioning assembly 17 and the first positioning assembly 16 may have the same structure, and specifically, the second positioning assembly 17 includes: a second bearing 171 and a second bracket 172. Wherein the second bearing 171 includes: the second inner ring member 1711 sleeved on the crank 11, a second outer ring member 1712 coaxial with and opposite to the second inner ring member 1711, and a plurality of second rolling bodies 1713 distributed between the second inner ring member 1711 and the second outer ring member 1712, wherein the second inner ring member 1711 is abutted against the positioning ring 13 near the head end 112 of the crank 11. Next, the second bracket 172 is sleeved on the second outer ring member 1712 of the second bearing 171, and the second bracket 172 can be used to support and fix the second bearing 171. It is thus found that by supporting the first bearing 161 and the second bearing 171 by the first bracket 162 and the second bracket 172, respectively, stability of the crank 11 during rotation can be ensured, and unnecessary vibration can be prevented from being generated.

Example two

A second embodiment of the present utility model relates to a crank-cam mechanism, as shown in fig. 4, 5 and 6, comprising: cam module 1, crankshaft 3, output shaft 4 and input shaft 5 as described in embodiment one.

As shown in fig. 6, the crank 11 of the cam unit 1 is provided with a shaft hole 113 in the axial direction thereof, and the crank 3 is inserted into the shaft hole 113 of the crank 11 at least partially and is fixed coaxially with the crank 11. Next, as shown in fig. 5, the output shaft 4 and the input shaft 5 are coaxially provided, and the output shaft 4 is connected to one end of the crankshaft 3 and is eccentrically provided to the crankshaft 3. Meanwhile, the input shaft 5 is connected to the other end of the crankshaft 3 and is eccentrically disposed with respect to the crankshaft 3.

As can be seen from the foregoing, the cam assembly 1 of the crank-cam mechanism comprises: the crank 11 and a plurality of eccentric wheels 12, and the quantity of eccentric wheels 12 exceeds two, and each eccentric wheel 12 is arranged along the axis direction of the crank 11 in turn. Simultaneously, deflection angles are formed between every two adjacent eccentric wheels 12 around the axis direction of the crank 11, and the angles of the deflection angles are the same, so that each cylinder 2 of the air compressor can adopt the same arrangement mode as each eccentric wheel 12, namely each cylinder 2 of the air compressor can be arranged around the crank 11 around the axis direction of the crank in the same way corresponding to each eccentric wheel 12, and each eccentric wheel 12 can sequentially change the rotary motion of the crank 11 into the reciprocating linear motion of the piston of each cylinder 2 when the crank 11 rotates. Therefore, the air compressor can increase the number of the air cylinders 2 without increasing the number of the crank cam mechanisms, so that the air compressor has smaller volume, and meanwhile, as only one crank cam mechanism of the air compressor is running, the air compressor also has better balance and stability, and unnecessary vibration of the air compressor in working is eliminated.

Specifically, in some embodiments, as shown in fig. 4, the output shaft 4 and the input shaft 5 may be detachably connected to two ends of the crankshaft 3, for example, the output shaft 4 and the input shaft 5 may be locked and fixed with the crankshaft 3 by using bolts, etc., and in other embodiments, the output shaft 4 and the input shaft 5 may be connected by other manners, but in this embodiment, the connection manner between the output shaft 4 and the input shaft 5 of the crankshaft 3 is not specifically limited.

Example III

A third embodiment of the present utility model relates to an air compressor, as shown in fig. 7, comprising: a crank-cam mechanism and a plurality of cylinders 2 as described in the second embodiment. Wherein the number of cylinders 2 is twice the number of the eccentric wheels 12 of the crank-cam mechanism, and the respective eccentric wheels 12 are arranged equidistantly around the axial direction of the output shaft 4 or the input shaft 5 of the crank-cam mechanism.

As can be seen from the foregoing, the cam assembly 1 of the crank-cam mechanism comprises: the crank 11 and the eccentric wheels 12, and the number of the eccentric wheels 12 exceeds two, and each eccentric wheel 12 is sequentially arranged along the axis direction of the crank 11, meanwhile, deflection angles are formed between every two adjacent eccentric wheels 12 around the axis direction of the crank 11, and the angles of all the deflection angles are the same, so that each cylinder 2 of the air compressor can adopt the same arrangement mode as each eccentric wheel 12, namely, each cylinder 2 of the air compressor can be similarly arranged around the crank 11 along the axis direction of the crank in a crank 12, and each eccentric wheel 12 can sequentially change the rotary motion of the crank 11 into the reciprocating linear motion of the piston of each cylinder 2 during the rotation of the crank 11. Therefore, the air compressor can be made to have a smaller volume without increasing the number of crank-cam mechanisms while increasing the number of cylinders 2. Meanwhile, as the air compressor only has one crank cam mechanism to operate, the air compressor also has better balance and stability, and unnecessary vibration of the air compressor during working is eliminated.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments in which the utility model is practiced and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.

Claims

1. A cam assembly, comprising:

2. The cam assembly of claim 1, wherein each of the eccentric wheels is equidistantly disposed along the axis of the crank.

3. The cam assembly of claim 1, wherein N = 3 and the deflection angle between each adjacent two of the eccentrics is 120 degrees.

4. A cam assembly according to any one of claims 1-3, further comprising:

The M positioning rings are sequentially arranged along the axial direction of the crank; wherein, m=n+1, each positioning ring has an inner ring surface opposite to the crank and an outer ring surface far away from the crank, and the inner ring surface of each positioning ring is attached to the crank;

Wherein, every two adjacent positioning rings are detachably provided with one eccentric wheel.

5. The cam assembly of claim 4, wherein the eccentric disposed between each adjacent two of the retaining rings is secured to both of the retaining rings by a retaining pin.

6. The cam assembly of claim 4, wherein each of the retaining rings is disposed coaxially with the crank.

7. The cam assembly of claim 4, further comprising:

The first positioning assembly and the second positioning assembly are detachably arranged at two ends of the crank along the axial direction of the crank;

The first positioning assembly is abutted with the positioning ring which is arranged close to the tail end of the crank, and the second positioning assembly is abutted with the positioning ring which is arranged close to the head end of the crank.

8. The cam assembly of claim 7, wherein the first detent assembly comprises:

A first bearing; the first bearing includes: the first inner ring piece is sleeved on the crank, the first outer ring piece is coaxial with and opposite to the first inner ring piece, and a plurality of first rolling bodies are distributed between the first inner ring piece and the first outer ring piece, and the first inner ring piece is abutted with the positioning ring which is arranged close to the tail end of the crank;

The first bracket is sleeved on the first outer ring piece of the first bearing and used for supporting and fixing the first bearing;

The second positioning assembly includes:

A second bearing; the second bearing includes: the second inner ring piece is sleeved on the crank, the second outer ring piece is coaxial with and opposite to the second inner ring piece, and a plurality of second rolling bodies are distributed between the second inner ring piece and the second outer ring piece, and the second inner ring piece is abutted with the positioning ring which is arranged close to the head end of the crank;

the first bracket is sleeved on the second outer ring piece of the second bearing and used for supporting and fixing the second bearing.

9. A crank-cam mechanism, comprising:

The cam assembly of any one of claims 1-8; the crank is provided with a shaft hole along the axis direction;

wherein the output shaft and the input shaft are coaxially arranged.

10. An air compressor, comprising: the crank-cam mechanism of claim 9, K cylinders; wherein, K=2N, each cylinder is around the axis direction equidistance ring setting of output shaft or input shaft.