CN220890483U - Dual-type piston mechanism - Google Patents

Abstract

The utility model belongs to the field of fluid, and provides a dual-type piston mechanism, which comprises: the rotating center of the rotating shaft is parallel to the axis of the rotating shaft; the first piston assembly and the second piston assembly are movably sleeved on the rotating shaft, the first piston assembly and the second piston assembly are mutually perpendicular, the first piston assembly and the second piston assembly are both eccentrically arranged on the rotating shaft, and the eccentric axis of the first piston assembly is parallel to the eccentric axis of the second piston assembly; the rotation of the rotating shaft is used for driving the first piston assembly and the second piston assembly to do cross reciprocating motion. Compared with the prior art, the utility model has the advantages that the first piston component and the second piston component which are both eccentrically arranged on the rotating shaft are driven to carry out cross reciprocating motion by the eccentrically arranged rotating shaft, so that the reciprocating motion is equivalent to standard circular motion, the stability is good, and the vibration phenomenon generated during the operation of the machine is avoided.

Description

Dual-type piston mechanism

Technical Field

The utility model belongs to the field of fluid, and particularly relates to a dual-type piston mechanism.

Background

At present, the traditional piston structure mostly adopts the bent axle drive connecting rod, drives the piston through the connecting rod and carries out straight reciprocating motion in the piston cylinder, wherein, because the motion track of connecting rod is the wobbling mode, and traditional piston pump can't eliminate unbalanced force completely, and the bearing leads to lubrication condition not enough because the pivot angle is less, and the vibration noise of finally making machinery when the operation is great, and can't eliminate, very big degree has influenced the holistic operating condition of piston structure.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: the dual type piston mechanism has the advantages that the whole structure is simple, the first piston assembly and the second piston assembly which are eccentrically arranged on the rotating shafts are driven by the rotating shafts which are eccentrically arranged, and the reciprocating motions are crossed, so that the reciprocating motions are equivalent to standard circular motions, the stability is good, and the vibration phenomenon generated during the operation of the machine is avoided.

The technical scheme adopted by the utility model for solving the technical problems is that the utility model provides a dual-type piston mechanism, which comprises: the rotating center of the rotating shaft is parallel to the axis of the rotating shaft;

The first piston assembly and the second piston assembly are movably sleeved on the rotating shaft, the first piston assembly and the second piston assembly are mutually perpendicular, the first piston assembly and the second piston assembly are eccentrically arranged on the rotating shaft, and the eccentric axis of the first piston assembly is parallel to the eccentric axis of the second piston assembly;

The rotation of the rotating shaft is used for driving the first piston assembly and the second piston assembly to do cross reciprocating motion.

In the dual piston mechanism, the rotating shaft includes:

The rotating centers of the first eccentric shafts are parallel to the axial lines of the first eccentric shafts, the first piston assemblies and the second piston assemblies are movably sleeved on the first eccentric shafts, and the first piston assemblies and the second piston assemblies are eccentrically arranged on the first eccentric shafts;

The first bearing and the second bearing are arranged on the first eccentric shaft, the outer ring of the first bearing is clung to the first piston assembly, the outer ring of the second bearing is clung to the second piston assembly, and the first bearing and the second bearing are used for driving the first piston assembly and the second piston assembly to do cross reciprocating motion.

In the dual-type piston mechanism, the two end parts of the first eccentric shaft are respectively provided with the first balancing weights, the first balancing weights are detachably connected to the first eccentric shaft, and the axial lead of the first eccentric shaft and the central line of the first balancing weights are not arranged in a collinear manner.

In the dual-type piston mechanism, a first double-head piston rod and a first eccentric block are arranged on the first piston assembly, and a second double-head piston rod and a second eccentric block are arranged on the second piston assembly;

A yielding groove is formed in the first double-head piston rod, and the second double-head piston rod is movably arranged in the yielding groove and is mutually perpendicular to the first double-head piston rod;

The first eccentric block and the second eccentric block are movably sleeved on the first eccentric shaft, the first eccentric block and the second eccentric block are connected with each other, and the central lines of the first eccentric block and the second eccentric block are respectively positioned at two sides of the axial line of the first eccentric shaft;

The third bearing and the fourth bearing are arranged in the first double-head piston rod and the second double-head piston rod, the third bearing is arranged on the outer side wall of the first eccentric block, the outer ring of the third bearing is clung to the inner wall of the mounting groove in the first double-head piston rod, the fourth bearing is arranged on the outer side wall of the second eccentric block, and the outer ring of the fourth bearing is clung to the inner wall of the mounting groove in the second double-head piston rod.

In the dual piston mechanism, the eccentricity of the first eccentric shaft is half of the distance from the center line of the first eccentric block to the center line of the second eccentric block.

In the dual piston mechanism, the rotating shaft includes:

the rotating center of the second eccentric shaft is arranged in parallel with the axis line of the second eccentric shaft;

The center lines of the second balancing weights are arranged in parallel with the axis of the second eccentric shaft;

The fifth bearing is positioned in the second balancing weight, the inner ring of the fifth bearing is clung to the first piston assembly, and the fifth bearing is used for driving the first piston assembly to reciprocate in a linear manner along the length direction of the first piston assembly.

In the dual-type piston mechanism, a third double-headed piston rod and a third eccentric block are arranged on the first piston assembly, and a fourth double-headed piston rod and a fourth eccentric block are arranged on the second piston assembly;

A An Zhuangrong cavity is formed in the third double-headed piston rod, and the fourth double-headed piston rod is movably arranged in the mounting cavity and is perpendicular to the third double-headed piston rod;

The third eccentric block and the fourth eccentric block are movably sleeved on the second eccentric shaft, the third eccentric block and the fourth eccentric block are connected with each other, and the central lines of the third eccentric block and the fourth eccentric block are respectively positioned at two sides of the axial lead of the second eccentric shaft;

The third eccentric block is arranged in the mounting cavity, the inner ring of the third bearing is tightly attached to the outer side wall of the third eccentric block, the third bearing is arranged in the third double-head piston rod, and the inner ring of the third bearing is tightly attached to the outer side wall of the third eccentric block.

In the above-mentioned dual piston mechanism, further comprising:

The shell is internally provided with a first chute and a second chute which are mutually perpendicular, two end parts of the third double-head piston rod are movably arranged in the first chute, and two end parts of the fourth double-head piston rod are movably arranged in the second chute;

the driving motor is arranged in the shell, a shaft coupling is arranged at the driving end of the driving motor, the second eccentric shafts are eccentrically arranged on the shell, and the end parts of the second eccentric shafts are connected with the shaft coupling.

The technical scheme adopted by the utility model for solving the technical problems is that a working method is also provided, comprising a dual-type piston mechanism in the above steps:

s1, driving a first eccentric shaft to eccentrically rotate relative to a shell by a driving motor;

S2, the first bearing and the second bearing rotate along with the first eccentric shaft, so that the first eccentric block and the second eccentric block eccentrically rotate together relative to the first eccentric shaft;

S3, the first eccentric block and the second eccentric block push the first double-head piston rod and the second double-head piston rod to do cross reciprocating motion through outer rings of the fourth bearing and the fifth bearing respectively in the eccentric rotation process.

S4, repeating the steps circularly.

The technical scheme adopted by the utility model for solving the technical problems is that a working method is also provided, comprising a dual-type piston mechanism in the above steps:

s1, driving a second eccentric shaft to eccentrically rotate relative to a shell by a driving motor;

s2, driving a third eccentric block and a fourth eccentric block which are connected with each other through a fifth bearing in the second balancing weight to eccentrically rotate relative to the second eccentric shaft synchronously;

S3, the outer ring of a sixth bearing on the third eccentric block pushes the third double-headed piston rod to reciprocate along the length direction of the third double-headed piston rod, and meanwhile, the outer ring of a seventh bearing on the fourth eccentric block pushes the fourth double-headed piston rod to reciprocate along the length direction of the fourth double-headed piston rod, so that the cross reciprocating movement of the third double-headed piston rod and the fourth double-headed piston rod is realized;

S4, repeating the steps circularly.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the dual-type piston mechanism, the first piston assembly and the second piston assembly are eccentrically arranged relative to the rotating shaft through the eccentrically arranged rotating shaft, and the eccentric axes of the first piston assembly and the second piston assembly are arranged in parallel, so that the first piston assembly and the second piston assembly which are eccentrically arranged can be driven to do crossed linear reciprocating motion in the rotating process of the rotating shaft, namely, the two linear crossed reciprocating motion modes of the first piston assembly and the second piston assembly are realized by means of rotation of the rotating shaft, the mode is equivalent to standard circular motion, the phenomenon that vibration cannot occur in the operating process of a machine is further ensured, noise is eliminated, and meanwhile, the whole operating condition of the piston structure is ensured not to be influenced.

(2) In the moving process of the piston mechanism, all the bearings move completely circularly, so that the conditions of severe operating conditions and easy damage of the bearings are improved, and the service life of the bearings is prolonged.

(3) The abdication groove in the first double-end piston rod and the An Zhuangrong cavity in the third double-end piston rod are both used for ensuring that two double-end piston rods which are mutually perpendicular are not interfered in the cross motion process, ensuring the stability of the fluid piston mechanism in the operation process and being beneficial to saving the use of the mechanism on the whole space.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present application;

FIG. 2 is a full cross-sectional view of FIG. 1;

FIG. 3 is a view showing the mounting structure of a first double-headed piston rod and a second double-headed piston rod in the first embodiment;

FIG. 4 is a view showing the mounting structure of the first eccentric mass, the second eccentric mass, the first balancing mass, and the second balancing mass and the first eccentric shaft in the first embodiment;

FIG. 5 is a cross-sectional view of a second embodiment of the present application;

Fig. 6 is a view showing the mounting structure of a first double-headed piston rod and a second double-headed piston rod in the second embodiment;

Fig. 7 is a view showing the mounting structure of the third eccentric mass, the fourth eccentric mass, and the second eccentric shaft in the second embodiment;

fig. 8 is a schematic structural diagram of the first embodiment and the second embodiment.

In the figure, 1, a rotating shaft; 10. a first piston assembly; 11. a second piston assembly;

2. A first eccentric shaft; 20. a first bearing; 21. a second bearing; 22. a first balancing weight;

3. A first double-headed piston rod; 30. a first eccentric block; 31. a relief groove; 32. a third bearing;

4. a second double-headed piston rod; 40. a second eccentric block; 41. a fourth bearing;

5. a second eccentric shaft; 50. a second balancing weight; 51. a fifth bearing;

6. a third double-headed piston rod; 60. a third eccentric block; 61. an Zhuangrong chambers; 62. a sixth bearing;

7. a fourth double-headed piston rod; 70. a fourth eccentric block; 71. a seventh bearing;

8. A housing; 80. a first chute; 81. a second chute; 82. a driving motor; 83. a coupling.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Embodiment one:

As shown in fig. 1 to 8, a dual piston mechanism of the present utility model includes: the rotating center of the rotating shaft 1 is arranged in parallel with the axial lead of the rotating shaft 1; the first piston assembly 10 and the second piston assembly 11 are movably sleeved on the rotating shaft 1, the first piston assembly 10 and the second piston assembly 11 are mutually perpendicular, the first piston assembly 10 and the second piston assembly 11 are both eccentrically arranged on the rotating shaft 1, and the eccentric axis of the first piston assembly 10 is parallel to the eccentric axis of the second piston assembly 11; wherein, the rotation of the rotation shaft 1 is used for driving the first piston assembly 10 and the second piston assembly 11 to do cross reciprocating motion.

The technical scheme mainly solves the problem that unbalanced force cannot be completely eliminated due to swinging of a connecting rod in the existing piston structure, and vibration occurs to a machine, specifically, as shown in fig. 2, the rotating center of the rotating shaft 1 is parallel to the shaft axis of the rotating shaft 1, namely, the eccentric arrangement of the rotating shaft 1 is utilized, and the first piston assembly 10 and the second piston assembly 11 which are arranged vertically are movably sleeved on the rotating shaft 1, and it is emphasized that the first piston assembly 10 and the second piston assembly 11 are both eccentrically arranged relative to the rotating shaft 1, as shown in fig. 2, the eccentric axis of the first piston assembly 10 relative to the eccentric axis of the rotating shaft 1 and the eccentric axis of the second piston assembly 11 relative to the eccentric axis of the rotating shaft 1 are respectively positioned at two sides of the shaft axis of the rotating shaft 1, and the eccentric axes of the first piston assembly 10 and the second piston assembly 11 are parallel, so that synchronous eccentric motion is performed on the first piston assembly 10 and the second piston assembly 11 which are at two different eccentric positions can be driven in the eccentric rotation process of the rotating shaft 1, and finally, the connecting rod is in the cross linear reciprocating motion of the first piston assembly 10 and the second piston assembly 11 is realized, the swinging of the rotating shaft 1 is replaced by the eccentric arrangement, the eccentric arrangement is made to rotate relative to the rotating shaft 1, the eccentric axis of the rotating shaft 1 is completely and the eccentric motion of the first piston assembly is also in the cross motion is completely and the cross motion is completely, and the vibration is avoided, and the vibration is generated in the vibration and the vibration is stable in the vibration and the vibration structure.

The rotation shaft 1 includes: the first eccentric shaft 2, the rotation center of the first eccentric shaft 2 is parallel to the axis line of the first eccentric shaft, the first piston assembly 10 and the second piston assembly 11 are movably sleeved on the first eccentric shaft 2, and the first piston assembly 10 and the second piston assembly 11 are both eccentrically arranged on the first eccentric shaft 2; the first bearing 20 and the second bearing 21 are both arranged on the first eccentric shaft 2, the outer ring of the first bearing 20 is clung to the first piston assembly 10, the outer ring of the second bearing 21 is clung to the second piston assembly 11, and the first bearing 20 and the second bearing 21 are both used for driving the first piston assembly 10 and the second piston assembly 11 to do cross reciprocating motion.

Further, in the first embodiment, the rotating shaft 1 is composed of the first eccentric shaft 2, the first bearing 20 and the second bearing 21, when the first piston assembly 10 and the second piston assembly 11 are required to do the cross linear reciprocating motion, in the eccentric rotation process of the eccentrically arranged first eccentric shaft 2, the first bearing 20 is tightly attached to the inner ring of the second bearing 21 and the outer wall of the first eccentric shaft 2, so that the first bearing 20 and the second bearing 21 respectively drive the first piston assembly 10 and the second piston assembly 11 which are also eccentrically arranged relative to the first eccentric shaft 2 to do the cross linear reciprocating motion along with the movement of the first eccentric shaft 2, and in the operation process, all the bearings do complete circular motion, so that the operation condition of the bearings is further improved, the phenomenon that the bearings are easy to damage due to the fact that complete circular motion cannot be formed is effectively avoided, the service life of the bearings is prolonged, meanwhile, the stability of the whole operation process of the piston mechanism is also improved, and in the scheme, all the bearings can be matched in a mode of adopting a limiting block to limit the axial direction of the eccentric shaft, and other modes of limiting the bearing to move along the interference direction are required to be adopted.

The two ends of the first eccentric shaft 2 are respectively provided with a first balancing weight 22, the first balancing weight 22 is detachably connected to the first eccentric shaft 2, and the axial lead of the first eccentric shaft 2 and the central line of the first balancing weight 22 are not arranged in a collinear manner.

Because the first eccentric shaft 2 is eccentrically moved in the rotation process, in order to ensure the stability of driving the first piston assembly 10 and the second piston assembly 11 to perform the cross reciprocating movement under the rotation of the first eccentric shaft 2, the two ends of the first eccentric shaft 2 and the second eccentric shaft 5 are detachably connected with the first balancing weights 22 and the second balancing weights, as shown in fig. 2 and 4, the two balancing weights are eccentrically arranged relative to the first eccentric shaft 2, that is, the center positions of the two balancing weights are not in the same straight line with the axis line of the first eccentric shaft 2, so that the two balancing weights can be driven to rotate when the first eccentric block 30 is eccentrically moved, and the balance of the first eccentric shaft 2 is ensured to be kept unchanged in the rotation process by using the two balancing weights, thereby further improving the stability of the first piston assembly 10 and the second piston assembly 11 in the cross reciprocating movement.

The first piston assembly 10 is provided with a first double-headed piston rod 3 and a first eccentric block 30, and the second piston assembly 11 is provided with a second double-headed piston rod 4 and a second eccentric block 40; the first double-headed piston rod 3 is internally provided with a yielding groove 31, and the second double-headed piston rod 4 is movably arranged in the yielding groove 31 and is mutually perpendicular to the first double-headed piston rod 3; the first eccentric block 30 and the second eccentric block 40 are movably sleeved on the first eccentric shaft 2, the first eccentric block 30 and the second eccentric block 40 are connected with each other, and the central lines of the first eccentric block 30 and the second eccentric block 40 are respectively positioned at two sides of the axial lead of the first eccentric shaft 2; the third bearing 32 and the fourth bearing 41 are respectively provided with a mounting groove in the first double-headed piston rod 3 and the second double-headed piston rod 4, the third bearing 32 is arranged on the outer side wall of the first eccentric block 30, the outer ring of the third bearing 32 is tightly attached to the inner wall of the mounting groove in the first double-headed piston rod 3, the fourth bearing 41 is arranged on the outer side wall of the second eccentric block 40, and the outer ring of the fourth bearing 41 is tightly attached to the inner wall of the mounting groove in the second double-headed piston rod 4.

As shown in fig. 2 to 3, the first double-headed piston rod 3 and the second double-headed piston rod 4 are vertically disposed, wherein the first double-headed piston rod 3 is internally provided with a yielding groove 31, the yielding groove 31 is disposed along the length direction of the first double-headed piston rod 3, and the length distance of the yielding groove 31 is far greater than the maximum distance that the second eccentric block 40 rotates relative to the first eccentric shaft 2, that is, in the process of performing the crisscross reciprocating motion on the first double-headed piston rod 3 and the second double-headed piston rod 4, the yielding groove 31 can provide a moving space for the first double-headed piston rod 3 and the second double-headed piston rod 4, thereby effectively preventing the first double-headed piston rod 3 and the second double-headed piston rod 4 from generating position interference in the moving process, and being beneficial to the use of the first eccentric block 30 and the second eccentric block 40 in the space (not shown in the figure) by fixing members such as bolts and screws, therefore, when the first eccentric shaft 2 performs eccentric motion, the first eccentric block 30 and the second eccentric block 40 which are coupled are driven by the first bearing 20 and the second bearing 21 to perform eccentric rotation synchronously, as shown in fig. 4, because the eccentric positions of the first eccentric block 30 and the second eccentric block 40 relative to the first eccentric shaft 2 are just opposite, the first double-headed piston and the second double-headed piston are driven to perform crossed movement in the eccentric rotation process of the first eccentric block 30 and the second eccentric block 40, and in order to further ensure the fluency in the reciprocating movement process of the first double-headed piston rod 3 and the second double-headed piston rod 4 along the respective length directions, a third bearing 32 and a fourth bearing 41 are respectively arranged between the first eccentric block 30 and the first double-headed piston rod 3 and between the second eccentric block 40 and between the second double-headed piston rod 4, and the fluency in the rotation process of each eccentric block is promoted by using the bearings, the bearing can also push each double-headed piston rod to do linear reciprocating movement in the process of rotating and moving along the horizontal direction, so that the driving mode ensures that the bearing of each driving double-headed piston rod can realize complete circular movement, improves the operation working condition of the bearing, simultaneously couples the first eccentric block 30 and the second eccentric block 40, is equivalent to standard circular movement in the eccentric rotation process, and additionally the first balancing weight 22 and the second balancing weight can accurately ensure the stability of the first double-headed piston rod 3 and the second double-headed piston rod 4 in the process of doing crisscross reciprocating movement through dynamic balance calculation, thereby eliminating vibration generated in the operation of the machine and effectively preventing noise.

Preferably, in the scheme, the eccentricity of the first eccentric shaft 2 is set to be half of the distance from the central line of the first eccentric block 30 to the central line of the second eccentric block 40, as shown in fig. 2 and 4, the first eccentric block 30 and the second eccentric block 40 are symmetrically and eccentrically arranged on the first eccentric shaft 2, and as the first eccentric shaft 2 is also eccentrically arranged, the common eccentricity of the first eccentric block 30 and the second eccentric block 40 which are mutually connected is set to be twice of the eccentricity of the first eccentric shaft 2, so that the shaking generated when the first eccentric shaft 2 drives the first eccentric block 30 and the second eccentric block 40 to synchronously and eccentrically rotate is eliminated, and the phenomenon that the first double-headed piston rod 3 and the second double-headed piston rod 4 vibrate to generate noise in the operation process is avoided; in addition, the driving structure eccentrically sets the first eccentric block 30 and the second eccentric block 40 relative to the first eccentric shaft 2, and simultaneously, interconnects the first eccentric block 30 and the second eccentric block 40, so that the motions of the first double-headed piston rod 3 and the second double-headed piston rod 4 are respectively restrained and coupled with the first eccentric block 30 and the second eccentric block 40, and the motions are equivalent to standard circular motions, thereby ensuring the stability of the crossed reciprocating linear motions of pushing the first double-headed piston rod 3 and the second double-headed piston rod 4 in the rotating process of the first eccentric block 30 and the second eccentric block 40 and avoiding vibration during the operation of the machine.

Further, when the mass of the first double-headed piston rod 3 is the same as the mass of the second double-headed piston rod 4, the third eccentric block 60 and the fourth eccentric block 70 as shown in fig. 8 are connected as a whole, that is, the second eccentric shaft 5 performs circular motion to drive the third eccentric block 60 and the fourth eccentric block 70 to rotate synchronously, and the trigonometric function relationship can be obtained: the unbalanced forces generated when the first double-headed piston rod 3 and the second double-headed piston rod 4 move can be overlapped, the magnitude of the resultant force is unchanged, the direction is changed along the circumference (namely, the effect is equivalent to the centrifugal force generated by a certain mass object which moves around a fixed mass point in a circular way), the resultant force can be completely eliminated through dynamic balance calculation, so that vibration generated when the first double-headed piston rod 3 and the second double-headed piston rod 4 move in a cross reciprocating linear way is eliminated, and the trigonometric function and the dynamic balance calculation in the scheme are conventional calculation methods and are not repeated herein.

Based on the structure in the first embodiment, the working method of the piston mechanism comprises the following steps:

S1, a driving motor 82 drives a first eccentric shaft 2 to eccentrically rotate relative to a shell 8;

S2, the first bearing 20 and the second bearing 21 rotate along with the first eccentric shaft 2, so that the first eccentric block 30 and the second eccentric block 40 eccentrically rotate together relative to the first eccentric shaft 2;

S3, the first eccentric block 30 and the second eccentric block 40 push the first double-headed piston rod 3 and the second double-headed piston rod 4 to do cross reciprocating motion through the outer rings of the fourth bearing 41 and the fifth bearing 51 respectively in the eccentric rotation process.

S4, repeating the steps circularly.

Embodiment two:

As shown in fig. 5 to 8, the rotation shaft 1 includes: the rotation center of the second eccentric shaft 5 is arranged in parallel with the axis line of the second eccentric shaft 5; the second balancing weights 50 are positioned at the two ends of the second eccentric shaft 5, and the central lines of the second balancing weights 50 are arranged in parallel with the central line of the second eccentric shaft 5; the fifth bearing 51, the fifth bearing 51 is located in the second balancing weight 50, the inner ring of the fifth bearing 51 is tightly attached to the first piston assembly 10, and the fifth bearing 51 is used for driving the first piston assembly 10 to reciprocate linearly along the length direction thereof.

The second embodiment is another installation mode in the first embodiment, but it should be noted that, in both the second embodiment and the first embodiment, the two mutually perpendicular double-headed pistons are moved in a cross manner by the rotation of the eccentric shafts, so that the connecting rod is omitted, meanwhile, the unbalanced force is eliminated to ensure that the vibration phenomenon does not occur during the mechanical operation, the working principle and the working mode of the same structure are not repeated here, unlike in the first embodiment, as shown in fig. 5, the driving force for driving the first piston assembly 10 and the second piston assembly 11 to perform the cross reciprocating motion in the second embodiment is that the fifth bearing 51 is arranged in the second balancing weight 50 at two ends of the second eccentric shaft 5 in the eccentric rotation process through the second eccentric shaft 5 which is eccentrically arranged, and the connection mode method of the second balancing weight 50 and the second eccentric shaft 5 is the same as that of the first embodiment, and is not repeated here, so that the cross linear reciprocating motion of the first piston assembly 10 and the second piston assembly 11 can be completed by means of the fifth bearing 51 in the rotation process of the second balancing weight 50.

The first piston assembly 10 is provided with a third double-headed piston rod 6 and a third eccentric block 60, and the second piston assembly 11 is provided with a fourth double-headed piston rod 7 and a fourth eccentric block 70; the third double-headed piston rod 6 is internally provided with an installation containing cavity 61, and the fourth double-headed piston rod 7 is movably arranged in the installation containing cavity 61 and is vertical to the third double-headed piston rod 6; the third eccentric block 60 and the fourth eccentric block 70 are movably sleeved on the second eccentric shaft 5, the third eccentric block 60 and the fourth eccentric block 70 are connected with each other, and the central lines of the third eccentric block and the fourth eccentric block 70 are respectively positioned at two sides of the axial line of the second eccentric shaft 5; the sixth bearing 62 and the seventh bearing 71, the sixth bearing 62 is disposed in the mounting cavity 61, the inner ring of the sixth bearing 62 is tightly attached to the third eccentric block 60, the seventh bearing 71 is located in the fourth double-headed piston rod 7, and the inner ring of the seventh bearing 71 is tightly attached to the outer side wall of the fourth eccentric block 70.

Further, the third eccentric block 60 and the fourth eccentric block 70 which are connected with each other can be driven to eccentrically rotate by means of the fifth bearing 51 under the rotation of the second balancing weight 50, as shown in fig. 7, because the third eccentric block 60 and the fourth eccentric block 70 are eccentrically arranged relative to the second eccentric shaft 5, and the eccentric positions of the third eccentric block 60 and the fourth eccentric block 70 are opposite, when the third eccentric block 60 and the fourth eccentric block 70 synchronously rotate, the third eccentric block 60 drives the third double-headed piston rod 6 to reciprocate along the length direction by utilizing the rotation of the sixth bearing 62 and the movement during the rotation in the eccentric rotation process, and similarly, the fourth eccentric block 70 drives the fourth double-headed piston rod 7 to reciprocate along the length direction by utilizing the rotation of the seventh bearing 71 and the movement during the rotation in the eccentric rotation process, the second embodiment has the same double-headed piston rod structure as that in the first embodiment, except that the mounting cavity 61 is arranged in the third double-headed piston rod 6, as shown in fig. 6, the fourth cavity 7 is mounted in the cross cavity 61, and the fourth cavity 7 is not interfered with the fourth double-headed piston rod 7 by utilizing the movement of the fourth bearing 71, and the fourth double-headed piston rod structure is ensured that the fourth double-headed piston rod 6 can reciprocate by utilizing the large cross cavity 7 and the movement of the fourth double-headed piston rod 7.

Preferably, all the bearings in the first embodiment and the second embodiment can adopt deep groove ball bearings, four-point contact bearings, and other bearings such as cylindrical roller bearings or needle roller bearings can be adopted under the condition of large load. Under the complete circular motion condition of each bearing, the fluency of the rotating process of the parts is ensured, and the two double-head piston rods can complete the crisscross reciprocating movement to eliminate the vibration generated during the mechanical operation.

The scheme also comprises the following steps: the casing 8 is internally provided with a first chute 80 and a second chute 81 which are mutually perpendicular, two end parts of the third double-headed piston rod 6 are movably arranged in the first chute 80, and two end parts of the fourth double-headed piston rod 7 are movably arranged in the second chute 81; the driving motor 82 is arranged in the shell 8, the driving end of the driving motor 82 is provided with a coupling 83, the second eccentric shafts 5 are all eccentrically arranged in the shell 8, and the end parts of the second eccentric shafts 5 are connected with the coupling 83.

It should be noted that, in both the first embodiment and the second embodiment, the structure of the housing 8, the driving motor 82, and the like may be included, and in the following description, as shown in fig. 5, when the driving motor 82 is started, the second eccentric shaft 5 is driven to rotate by the coupling 83, and the second eccentric shaft 5 is not only eccentrically disposed with respect to the coupling 83, but also eccentrically disposed with respect to the housing 8, so that the second eccentric shaft 5 is driven by the driving motor 82 to eccentrically rotate with respect to the housing 8, and when the double-headed piston rods perpendicular to each other move along respective length directions by the eccentric blocks to reciprocate linearly.

Preferably, in the first embodiment and the second embodiment, besides the above-mentioned driving motor drives the eccentric shaft to rotate so that the two piston rods do the cross linear reciprocating motion, the two mutually perpendicular piston rods can also be used as driving members, that is, the cross linear reciprocating motion of the two piston rods is utilized to drive the eccentric shaft to eccentrically rotate relative to the housing, and the principle of the mode is the same as that of the ignition mode of the engine, and the description is omitted here.

Still be equipped with first spout 80 and second spout 81 in the casing 8 in this scheme, first spout 80 and second spout 81 correspond the setting with the double-end piston rod that is mutually perpendicular setting respectively, because every double-end piston rod all sets up in pairs, and the both ends activity of one of them double-end piston rod is at first spout 80, another double-end piston rod is moving in with second spout 81, guiding effect when two spouts have realized moving to the double-end piston rod, the spout also plays certain supporting effect to the both ends of double-end piston rod simultaneously, the atress condition of this piston has been improved to very big degree, and then the life of piston ring has been improved.

Further, since the piston in the traditional is driven by the connecting rod in the piston cylinder, the guiding distance of the piston is shorter, so that the abrasion of the piston ring is quicker, and the scheme adopts the third eccentric block 60 and the fourth eccentric block 70 which are connected with each other to carry out constraint coupling on the movements of the two double-headed piston rods which are vertically arranged, so that when the third eccentric block 60 and the fourth eccentric block 70 eccentrically rotate relative to the second eccentric shaft 5, the two double-headed pistons are driven to do the crossed linear reciprocating movement, the guiding distance of the double-headed piston rods in the shell 8 is also increased, and the service life of the piston ring is prolonged.

Based on the structure in the second embodiment, the working method of the piston mechanism comprises the following steps:

S1, a driving motor 82 drives a second eccentric shaft 5 to eccentrically rotate relative to a shell 8;

S2, driving the third eccentric block 60 and the fourth eccentric block 70 which are connected with each other through the fifth bearing 51 in the second balancing weight 50 to eccentrically rotate relative to the second eccentric shaft 5 synchronously;

S3, the outer ring of a sixth bearing 62 on a third eccentric block 60 pushes the third double-headed piston rod 6 to reciprocate along the length direction of the third double-headed piston rod, and at the same time, the outer ring of a seventh bearing 71 on a fourth eccentric block 70 pushes the fourth double-headed piston rod 7 to reciprocate along the length direction of the fourth double-headed piston rod, so that the cross reciprocating movement of the third double-headed piston rod 6 and the fourth double-headed piston rod 7 is realized;

S4, repeating the steps circularly.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Claims (8)

1. A dual piston mechanism comprising:

the rotating center of the rotating shaft is parallel to the axis of the rotating shaft;

The first piston assembly and the second piston assembly are movably sleeved on the rotating shaft, the first piston assembly and the second piston assembly are mutually perpendicular, the first piston assembly and the second piston assembly are eccentrically arranged on the rotating shaft, and the eccentric axis of the first piston assembly is parallel to the eccentric axis of the second piston assembly;

The rotation of the rotating shaft is used for driving the first piston assembly and the second piston assembly to do cross reciprocating motion.

2. A dual piston mechanism as claimed in claim 1, wherein said rotatable shaft comprises:

The rotating centers of the first eccentric shafts are parallel to the axial lines of the first eccentric shafts, the first piston assemblies and the second piston assemblies are movably sleeved on the first eccentric shafts, and the first piston assemblies and the second piston assemblies are eccentrically arranged on the first eccentric shafts;

The first bearing and the second bearing are arranged on the first eccentric shaft, the outer ring of the first bearing is clung to the first piston assembly, the outer ring of the second bearing is clung to the second piston assembly, and the first bearing and the second bearing are used for driving the first piston assembly and the second piston assembly to do cross reciprocating motion.

3. The dual-type piston mechanism according to claim 2, wherein the two end parts of the first eccentric shaft are respectively provided with a first balancing weight, the first balancing weights are detachably connected to the first eccentric shaft, and the axial lead of the first eccentric shaft and the central lead of the first balancing weights are not arranged in a collinear manner.

4. A dual piston mechanism as set forth in claim 3 wherein said first piston assembly has a first double-ended piston rod and a first eccentric mass and said second piston assembly has a second double-ended piston rod and a second eccentric mass;

A yielding groove is formed in the first double-head piston rod, and the second double-head piston rod is movably arranged in the yielding groove and is mutually perpendicular to the first double-head piston rod;

The first eccentric block and the second eccentric block are movably sleeved on the first eccentric shaft, the first eccentric block and the second eccentric block are connected with each other, and the central lines of the first eccentric block and the second eccentric block are respectively positioned at two sides of the axial line of the first eccentric shaft;

The third bearing and the fourth bearing are arranged in the first double-head piston rod and the second double-head piston rod, the third bearing is arranged on the outer side wall of the first eccentric block, the outer ring of the third bearing is clung to the inner wall of the mounting groove in the first double-head piston rod, the fourth bearing is arranged on the outer side wall of the second eccentric block, and the outer ring of the fourth bearing is clung to the inner wall of the mounting groove in the second double-head piston rod.

5. The dual piston mechanism of claim 4, wherein the first eccentric shaft has an eccentricity of one half of the distance from the first eccentric mass centerline to the second eccentric mass centerline.

6. A dual piston mechanism as claimed in claim 1, wherein said rotatable shaft comprises:

the rotating center of the second eccentric shaft is arranged in parallel with the axis line of the second eccentric shaft;

The center lines of the second balancing weights are arranged in parallel with the axis of the second eccentric shaft;

The fifth bearing is positioned in the second balancing weight, the inner ring of the fifth bearing is clung to the first piston assembly, and the fifth bearing is used for driving the first piston assembly to reciprocate in a linear manner along the length direction of the first piston assembly.

7. The dual piston mechanism of claim 6, wherein a third double-headed piston rod and a third eccentric block are provided on the first piston assembly, and a fourth double-headed piston rod and a fourth eccentric block are provided on the second piston assembly;

A An Zhuangrong cavity is formed in the third double-headed piston rod, and the fourth double-headed piston rod is movably arranged in the mounting cavity and is perpendicular to the third double-headed piston rod;

The third eccentric block and the fourth eccentric block are movably sleeved on the second eccentric shaft, the third eccentric block and the fourth eccentric block are connected with each other, and the central lines of the third eccentric block and the fourth eccentric block are respectively positioned at two sides of the axial lead of the second eccentric shaft;

The third eccentric block is arranged in the mounting cavity, the inner ring of the third bearing is tightly attached to the outer side wall of the third eccentric block, the third bearing is arranged in the third double-head piston rod, and the inner ring of the third bearing is tightly attached to the outer side wall of the third eccentric block.

8. The dual piston mechanism as set forth in claim 7 further comprising:

The shell is internally provided with a first chute and a second chute which are mutually perpendicular, two end parts of the third double-head piston rod are movably arranged in the first chute, and two end parts of the fourth double-head piston rod are movably arranged in the second chute;

the driving motor is arranged in the shell, a shaft coupling is arranged at the driving end of the driving motor, the second eccentric shafts are eccentrically arranged on the shell, and the end parts of the second eccentric shafts are connected with the shaft coupling.