WO2022142485A1

WO2022142485A1 - Laminated eccentric shaft hole structural assembly and air compressor equipped with same

Info

Publication number: WO2022142485A1
Application number: PCT/CN2021/118812
Authority: WO
Inventors: 陈君立; 杨树发; 陈威龙; 耿爱农; 阮勤江
Original assignee: 浙江鸿友压缩机制造有限公司
Priority date: 2020-12-31
Filing date: 2021-09-16
Publication date: 2022-07-07
Also published as: CN112682293A

Abstract

A laminated eccentric shaft hole structural assembly. The laminated eccentric shaft hole structural assembly is formed by superposing flat-structure eccentric unit components (A). The axes of an outer circle structural unit (1) and an inner hole structural unit (2) of each eccentric unit component (A) are parallel and offset from each other, thereby constituting a crank pin mechanism capable of achieving mutual conversion between rotary motion and reciprocating motion. The eccentric unit component is a flat-structure part, can be manufactured by using a relatively cheap punching process, and can be manufactured by using the waste material of a plate, and therefore, the production cost can be effectively reduced. Further provided is an air compressor equipped with the laminated eccentric shaft hole structural assembly.

Description

A laminated eccentric shaft hole structure assembly and an air compressor equipped with the assembly

technical field

The invention belongs to the technical field of fluid machinery, and relates to a volumetric fluid machine that realizes mutual conversion between rotary motion and reciprocating motion based on a crank mechanism, in particular to reciprocating piston type and rocking piston type volumetric compressors, pumps, hydraulic motors or pneumatic A method for obtaining a crank structure of a motor and a manufacturing process thereof.

Background technique

Existing reciprocating piston and rocking piston compressors, pumps, hydraulic motors and air motors often require a crankshaft configuration type mechanism to realize the mutual conversion between rotary motion and reciprocating motion, so as to use the crank structure to transmit the power of the driving shaft. Motion and power to drive the connecting rod and then drive the piston through the connecting rod to generate reciprocating motion or/and rocking motion, or use the crank structure to transmit the motion and power of the active piston to drive the connecting rod and then drive the shaft through the connecting rod to generate rotational motion, In this way, the conversion between rotary motion and power and reciprocating motion and power is achieved. For example, the direct-coupled reciprocating piston compressor and the rocking piston compressor use a mechanism constructed of a crankshaft to convert the rotary motion of the motor into the reciprocating motion or/and rocking motion of the piston, so as to obtain the periodic change of the working chamber volume of the compressor, and In this way, the lifting and transportation of the fluid working medium pressure are finally completed.

Currently, reciprocating piston type or rocking piston type positive displacement compressors, pumps, and hydraulic and air motors all have crank structures that include a solid journal and a solid crank pin offset relative to the shaft diameter, wherein the crank pin tightens It is fixed on the journal or made of an integral structure with the crank pin and the journal, or the crank pin is offset and connected to the journal through a crank arm, and then the connecting rod big end bearing seat hole is set. The crankshaft structure is obtained on the solid crankpin. The above-mentioned crankshaft structure is often called an integral crankshaft or a combined crankshaft. The crankpin is an integral solid structure, and the crankpin needs to be machined to ensure the size. Accuracy and Geometric Tolerance.

However, in the above-mentioned traditional reciprocating piston type and rocking piston type positive displacement compressors, pumps, hydraulic motors and air motors, their crank structures still have room for improvement, mainly as follows: 1) The crank pin of the integral solid structure is a It is necessary to use machining to ensure its dimensional accuracy and geometric tolerance. Due to the eccentric structure, it is difficult to perform machining such as turning and grinding, and there are many processing procedures, resulting in an increase in its production cost; 2) Monolithic entity The constructed crankpin structure requires a solid block or blank for subtractive processing in order to obtain the specified dimensional accuracy, specified shape structure and specified surface quality, so it is more wasteful of material and therefore more expensive; 3) Monolithic solid Once the structured crank pin is designed and manufactured, it is usually only suitable for a single type of compressor, and cannot be flexibly adjusted for different series of products, such as products with different piston strokes, resulting in higher production costs and longer production cycles.

SUMMARY OF THE INVENTION

In view of the shortcomings of the traditional integral solid structure crankpin, the present invention proposes a laminated eccentric shaft hole structure assembly, the purpose is to obtain a crankpin structure quickly and at low cost based on the eccentric shaft hole structure assembly; further, this The crank pin structure composed of the eccentric shaft hole structure assembly is assembled and applied to the air compressor, thereby reducing the production cost of the compressor.

The object of the present invention is achieved in this way: a laminated eccentric shaft hole structure assembly is characterized in that: the assembly includes at least two eccentric unit members in a flat structure, and these eccentric unit members include an outer circle Structural unit and inner hole structure unit, the outer circle structure unit is an outer cylindrical surface structure with the same radius outer circle element set, and the inner hole structure unit is the inner wall surface of a single or multiple inner hole element collection Constructed, the outer circular structural unit of the eccentric unit member has an outer circular axis, and the inner hole structural unit of the eccentric unit member has an inner hole axis, the outer circular axes are offset with respect to the inner hole axis and they are parallel to each other.

Further, the above-mentioned eccentric unit member is provided with a fitting structure.

Further, the above-mentioned eccentric unit member is provided with at least two through holes.

Further, the above-mentioned eccentric unit components are stacked together in an adjacent layout, and the outer axis of all eccentric unit components outer circular structural units is set coaxially, and the inner hole axes of all eccentric unit component inner hole structural units are coaxially arranged. axis settings.

Further, at least two threaded holes are formed on the stacked eccentric unit members.

The inner hole structure unit of the above-mentioned eccentric unit member includes a section of superior arc and a section of chord formed by the connection line between the two arc ends of the superior arc, and the inner wall surface is constructed as a chord based on the superior arc and the connection line between the two arc ends. As a generating line, it is generated by moving along the direction of the inner hole axis, wherein the superior arc wall surface generated by the superior arc and the chord tangent wall surface generated by the chord form the generatrix of the hole parallel to the inner hole axis.

The outer circular structural units of all the eccentric unit members have the same outer cylindrical surface structure, and the inner hole structural units of all the eccentric unit members have the same inner wall surface structure.

Further, the above-mentioned outer cylindrical surface structure is provided with several axial grooves.

An air compressor equipped with a laminated eccentric shaft hole structure assembly, including a connecting rod, a bearing, a rotating shaft, a piston and a cylinder, wherein the piston is fitted at the small end of the connecting rod and is placed in the cylinder, and the piston receives The reciprocating motion is carried out by the constraint of the cylinder, the outer cylindrical surface of the bearing is closely matched with the big end seat hole of the connecting rod, the rotating shaft includes a driving cylindrical surface and a driving plane, and is characterized in that: the laminated type The outer circular structural unit of the eccentric shaft hole structure assembly is closely matched with the inner hole surface of the bearing, and the inner hole structural unit of the laminated eccentric shaft hole structural assembly is closely matched with the driving cylindrical surface and the driving plane of the rotating shaft.

The above-mentioned driving cylindrical surface is a superior arc outer cylindrical surface, and the driving plane is a tangential plane closed with the superior arc outer cylindrical surface, wherein the superior arc outer cylindrical surface is closely fitted with the superior arc circular arc wall surface of the eccentric unit member, The tangential plane is in close fit with the tangential wall of the eccentric unit member.

The above-mentioned air compressor is provided with a centrifugal balance block, and the centrifugal balance block adopts the structure of rivet connection or/and screw connection to be tightly connected with the laminated eccentric shaft hole structure assembly.

The above-mentioned air compressor is provided with a cooling fan, and the cooling fan is connected and matched with the rotating shaft of the air compressor.

Compared with the prior art, the present invention has the outstanding advantages as follows: the crank pin structure is obtained by using the laminated eccentric shaft hole structure assembly, and the crank connecting rod mechanism is obtained by combining it with the connecting rod piston, and finally the combination of rotary motion and reciprocating motion is realized. On the one hand, the basic eccentric unit components are flat structural parts, which can be easily obtained by punching manufacturing process, without the need for time-consuming, consumable and labor-consuming machining methods such as turning and grinding. Therefore, the production cost is low while ensuring dimensional accuracy and geometric tolerance; on the other hand, the use of punching process to obtain eccentric unit components can effectively use various waste plates for manufacturing, which can not only greatly improve work efficiency At the same time, it can greatly save manufacturing materials and reduce production costs; further, the process of obtaining a crank pin structure by using a laminated eccentric shaft hole structure component is applied to the field of air compressor manufacturing, which has a large volume and a wide range of influences, and its crank pin can be flexible. The size can be adjusted to adapt to different types of compressors, so it can be flexibly adjusted for different series of products, so the production cycle of the air compressor is shortened and the production cost is effectively reduced.

Description of drawings

1 is a schematic axonometric view of an embodiment of a laminated eccentric shaft hole structure assembly of the present invention;

FIG. 2 is an assembly exploded view of the embodiment of the laminated eccentric shaft hole structure assembly of the present invention shown in FIG. 1;

3 is a front view of the eccentric unit member of the embodiment of the laminated eccentric shaft hole structure assembly of the present invention shown in FIG. 1;

Figure 4 is a schematic axonometric view of the eccentric unit member shown in Figure 3;

Fig. 5 is an exploded view of the assembly of the air compressor equipped with the laminated eccentric shaft hole structure assembly of the present invention.

Detailed ways

The present invention is further described below with specific embodiments, referring to Figures 1-5:

A laminated eccentric shaft hole structure assembly, the assembly includes at least two flat eccentric unit members A, these eccentric unit members A include an outer circle structure unit 1 and an inner hole structure unit 2, the said The outer circle structure unit 1 is an outer cylindrical surface structure 1a with a set of outer circle elements of the same radius, and the inner hole structure unit 2 is an inner wall surface structure 2a of a single or a plurality of inner hole element sets, wherein the eccentric unit member A The outer circular structure unit 1 has an outer circular axis 01, the inner hole structure unit 2 of the eccentric unit member A has an inner hole axis 02, and the outer circular axis 01 is offset and parallel to each other with respect to the inner hole axis 02. status (as shown in Figures 1 to 4). Here, the outer cylindrical surface structure 1a may be a collection of point-shaped, arc-shaped or other shaped outer circular elements, and the outer circular elements constituting the outer cylindrical surface structure 1a may be either continuous or discrete. It can be a single element or a combination of multiple elements. In other words, as long as it is a point, arc or arc surface that is equal to the outer circle axis 01, they can be used as the outer circle element constituting the outer cylindrical surface structure 1a. In particular, the outer cylindrical surface structure 1a can be a complete outer cylindrical surface, that is, the outer cylindrical structural unit 1 is a single, complete, closed and continuous outer cylindrical surface (not shown in the figure); The inner wall surface structure 2a can be a collection of point-shaped, arc-shaped or other shaped inner hole elements, and the inner hole elements constituting the inner wall surface structure 2a can be either continuous or discrete, or a single element. It can also be a combination of multiple elements. In particular, the inner wall surface structure 2a can be composed of a circular arc wall surface 2b and a tangential wall surface 2c. Figures 1 to 4 show an embodiment of such a situation: in this embodiment , the inner hole structure unit 2 of the eccentric unit member A includes a section of superior arc and a section of chord PQ formed by the connection between the two arc ends of the superior arc (ie point P and point Q, see Figure 3). , wherein the arc wall surface 2b is generated by moving along the direction of the inner hole axis 02 based on the superior arc as the generating line, and the chord tangent wall surface 2c is based on the chord PQ formed by the connection between the two arc ends of the superior arc as the generating line And it is generated by moving along the direction of the inner hole axis 02. It can also be said that the superior arc wall surface (that is, the arc wall surface 2b) generated by the superior arc and the chord PQ formed by the connection of the arc end of the superior arc. The chord tangent wall surface 2c is generated. The busbar of the formed hole is parallel to the axis 02 of the inner hole. It should be noted that the superior arc is a mathematical concept, which refers to an arc with a central angle greater than 180 degrees. In particular, all the eccentric unit members A in the present invention and their outer cylindrical structural units 1 have a consistent outer cylindrical surface configuration 1a (here, it particularly means that they have equal radii, that is, their outer circular elements are 0.1 from the outer cylindrical axis 01 ). equal), all the eccentric unit members A and their inner hole structural units 2 have a consistent inner wall surface configuration 2a (here, especially when viewed along the direction of the inner hole axis 02, they have the same shape configuration), Figures 1 and 1 Figure 2 shows a specific example of such a situation. Obviously, the present invention adopts the eccentric unit member A including the structural features of the outer cylindrical surface structure 1a and the inner wall surface structure 2a, and the outer cylindrical axis 01 and the inner wall surface structure 2a of the outer circular structure unit 1 constituted by the outer cylindrical surface structure 1a. The inner hole axis 02 of the formed inner hole structural unit 2 is offset and parallel to each other. When the inner hole axis 02 is used as the fixed axis and the outer circular axis 01 is rotated around it, the eccentric unit member A can be made. To obtain eccentric rotational motion, in other words, the eccentric unit member A can be equivalent to the structure and function of the eccentric pin shaft based on its outer circular axis 01, that is, the structure and function of the crank pin. At this time, the inner hole structure unit 2 is The function equivalent to the rotating shaft can be obtained, and the outer circular structural unit 1 can obtain the function equivalent to the crank pin; of course, in the present invention, the outer circular axis 01 can also be used as the fixed axis axis, and the inner hole axis 02 can be rotated around it. At this time, the outer circle structure unit 1 can obtain the function equivalent to the rotating shaft, and the inner hole structure unit 2 can obtain the function equivalent to the crank pin. In addition, since the eccentric unit member A of the present invention has a flat structure, it can be produced by a relatively cheap punching process and can be produced by using the waste material of the plate, so the production cost of the crank pin mechanism can be effectively reduced.

Further, the eccentric unit member A of the present invention is provided with a fitting structure 3 (see FIGS. 1 , 3 and 4 ), and the fitting structure 3 may be a concavo-convex structure with respect to the side surface of the eccentric unit member A (this side surface). Refers to the plane perpendicular to the outer circular axis 01, there are two such side surfaces on each eccentric unit member A), its purpose is to facilitate the eccentric unit members A that are adjacent to each other are pre-tightly assembled together to form multiple eccentrics For an assembly assembled from the unit components A, the embedded structure 3 can be manufactured by using the prior art, especially by a punching process. Still further, the eccentric unit member A of the present invention is provided with at least two through holes 4 (refer to FIG. 1 , FIG. 3 and FIG. 4 ). The component A is tightly assembled into an assembly; similarly, a number of axial grooves 5 can be opened on the outer cylindrical surface structure 1a (see Figure 1, Figure 3 and Figure 4), so that the eccentric unit components A can be assembled in a stack Welding can be performed at these grooves 5 to ensure that a plurality of eccentric unit members A can be effectively fastened and assembled into an assembly equivalent to an integral structure. It is worth pointing out that the eccentric unit members A in the present invention can be assembled in a manner that is not in close contact with each other, that is, a spacer part is inserted between two adjacent eccentric unit members A to reduce the eccentric unit member A. However, in the best case of the present invention, the eccentric unit members A are stacked together in an adjacent arrangement (as shown in Figures 1 and 2), which can enhance the strength of the laminated eccentric shaft hole structure assembly, especially Enhance the power it transmits; no matter whether it is arranged next to each other or not, the best situation of the laminated eccentric shaft hole structure assembly of the present invention is (see Figures 1 and 2) that all the eccentric unit members A have their outer circles The outer axis 01 of the structural unit 1 is arranged coaxially, and the inner hole axis 02 of the inner hole structural unit 2 of all the eccentric unit members A is arranged coaxially. In addition, the laminated eccentric shaft hole structure assembly composed of the stacked eccentric unit members A in the present invention can be provided with at least two threaded holes 6 (see FIG. 1 ), so that when necessary All the eccentric unit members A are fastened into one body by the bolt structure, and some other functional parts such as the balance weight 7 or the fan 8 can also be fastened by using the threaded hole 6 as a gripper (see FIG. 5 ).

An air compressor equipped with a laminated eccentric shaft hole structure assembly (see FIG. 5 ), including a connecting rod 9, a bearing 10, a rotating shaft 11, a piston 12 and a cylinder 13, wherein the piston 12 is fitted on the connecting rod 9. The small end is placed in the cylinder 13, and the piston 12 is constrained by the cylinder 13 to reciprocate. 11 includes a driving cylindrical surface 11a and a driving flat surface 11b, which is characterized in that: the outer circle structure unit 1 of the laminated eccentric shaft hole structure assembly is in close fit with the inner hole surface 10b of the bearing 10, and the laminated type The inner hole structure unit 2 of the eccentric shaft hole structure assembly closely fits with the driving cylindrical surface 11a and the driving plane 11b of the rotating shaft 11, so that the rotating shaft 11, the laminated eccentric shaft hole structure assembly, the connecting rod 9, the bearing 10, the piston 12 and the cylinder 13 can constitute the crank connecting rod mechanism of the air compressor. The specific transmission path is: the motor 14 rotates → the rotating shaft 11 is driven to rotate → the rotating shaft 11 drives the laminated eccentric through the driving cylindrical surface 11a and the driving plane 11b The eccentric unit member A of the shaft hole structure assembly is rotated (the inner hole axis 02 is the fixed axis axis, and the outer circular axis 01 rotates around the inner hole axis 02) → the eccentric unit member A of the laminated eccentric shaft hole structure assembly passes through its The outer circular structural unit 1 drives the bearing 10 to produce motion → the large end seat hole 9a of the connecting rod 9 is finally formed to rotate around the outer circular axis 01, and at the same time, the small end of the connecting rod 9 is derived to push the piston 12 to reciprocate in the cylinder 13. This achieves a periodic change in the volume of the air compression working chamber. Further, the driving cylindrical surface 11a of the air compressor of the present invention is a superior arc outer cylindrical surface structure, and the driving plane 11b is a tangential plane 11b closed with the superior arc outer cylindrical surface 11a, wherein the superior arc outer 11a and the eccentric unit member A are The superior arc-shaped arc wall surface 2b is closely matched with the chord tangent plane 11b and the chord tangent wall surface 2c of the eccentric unit member A is closely matched. Further, the present invention is equipped with an air compressor equipped with a laminated eccentric shaft hole structure assembly, on which a centrifugal balance block 15 (see FIG. 5 ) is provided, and the centrifugal balance block 15 is connected by rivets (not shown in the figure) or / The structure connected with the screw 16 (see Fig. 5) is tightly connected with the laminated eccentric shaft hole structure assembly, when the screw 16 is used to connect it can be fastened with the threaded hole 6 on the laminated eccentric shaft hole structural assembly Connection mate. Furthermore, the present invention is equipped with an air compressor with a laminated eccentric shaft hole structure assembly, on which a cooling fan 17 (as shown in FIG. 5 ) is arranged, and the cooling fan 17 is connected and matched with the rotating shaft 11 of the air compressor. Obviously, using the laminated eccentric shaft hole structure assembly to obtain the crank pin structure of the air compressor not only reduces the production cost of the compressor due to the cheap production of the laminated eccentric shaft hole structure assembly, but also reduces the production cost of the laminated eccentric shaft hole. The structure can adjust the eccentricity, that is, the distance between the outer axis 01 and the inner hole axis 02, and flexibly adapt to different types of compressors. Therefore, it can flexibly adjust flexibly for different series of products. The production cycle is shortened to effectively reduce the production cost.

Compared with the prior art, the outstanding advantage of the present invention is that the crank pin structure is obtained by using the laminated eccentric shaft hole structure assembly, and the crank connecting rod is obtained by combining it with other components such as the connecting rod 9 and the piston 12 On the one hand, the basic eccentric unit member A is a flat structural part, which can be easily obtained by punching manufacturing process without turning and grinding. It is manufactured by time-consuming, consumable and labor-consuming machining methods, so its production cost is low while ensuring dimensional accuracy and geometric tolerance; on the other hand, the use of punching process to obtain eccentric unit component A can effectively utilize various scraps It can not only greatly improve work efficiency but also greatly save manufacturing materials and reduce production costs; further, the process of using laminated eccentric shaft hole structure components to obtain crank pin structure is applied to a large amount of In the field of air compressor manufacturing, its crank pin can be flexibly adjusted in size to adapt to different types of compressors, and therefore can be flexibly adjusted for different series of products, thus shortening the production cycle of air compressors and effectively reducing production costs.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and does not limit the protection scope of the present invention accordingly. Therefore: all the various equivalent changes made according to the structure, shape and principle of the present invention should be covered in within the protection scope of the present invention.

Claims

A laminated eccentric shaft hole structure assembly is characterized in that: the assembly includes at least two flat-shaped eccentric unit components, and these eccentric unit components include an outer circle structure unit and an inner hole structure unit, and the The outer circle structure unit is an outer cylindrical surface structure with a set of outer circle elements of the same radius, the inner hole structure unit is an inner wall surface structure of a single or multiple inner hole element collection, and the outer circle structure unit of the eccentric unit member has An outer axis, the inner hole structural unit of the eccentric unit member possesses an inner hole axis which is offset with respect to the inner hole axis and which are parallel to each other.
The laminated eccentric shaft hole structure assembly according to claim 1, wherein the eccentric unit member is provided with an embedded structure.
The laminated eccentric shaft hole structure assembly according to claim 2, wherein at least two through holes are formed on the eccentric unit member.
A laminated eccentric shaft hole structure assembly according to claim 3, characterized in that: the eccentric unit members are stacked together in an adjacent layout, and all the eccentric unit members have outer circular structure units. The circular axes are arranged coaxially, and the inner hole axes of the inner hole structural units of all eccentric unit members are arranged coaxially.
A laminated eccentric shaft hole structure assembly according to claim 4, wherein at least two threaded holes are formed on the stacked eccentric unit members.
The laminated eccentric shaft hole structure assembly according to any one of claims 1 to 5, wherein the inner hole structure unit of the eccentric unit member comprises a section of superior arc and a section connected by the ends of the two arcs of the superior arc The chord formed by the line, and the inner wall surface is constructed to be generated by moving along the axis of the inner hole based on the chord connecting the superior arc and its two arc ends as the generating line, wherein the superior arc wall surface generated by the superior arc and The generatrix of the hole formed by the chord tangent walls generated by the chord is parallel to the axis of the inner hole.
The laminated eccentric shaft hole structure assembly according to claim 6, wherein the outer circular structure units of all the eccentric unit components have a consistent outer cylindrical surface structure, and the inner hole structure units of all the eccentric unit components have a consistent inner hole structure. wall structure.
The laminated eccentric shaft hole structure assembly according to claim 7, wherein a plurality of axial grooves are formed on the outer cylindrical surface structure.
An air compressor equipped with the laminated eccentric shaft hole structure assembly according to any one of claims 1 to 8, comprising a connecting rod, a bearing, a rotating shaft, a piston and a cylinder, wherein the piston is fitted on a small part of the connecting rod. The head end is placed in the cylinder, and the piston is constrained by the cylinder to reciprocate. The outer cylindrical surface of the bearing is tightly fitted with the large end seat hole of the connecting rod. The rotating shaft includes a driving cylindrical surface and a driving The plane is characterized in that: the outer circular structural unit of the laminated eccentric shaft hole structure assembly is in close fit with the inner hole surface of the bearing, and the inner hole structural unit of the laminated eccentric shaft hole structural assembly and the driving cylindrical surface of the rotating shaft and the drive plane are closely matched.
The air compressor equipped with the laminated eccentric shaft hole structure assembly according to claim 9, characterized in that: the driving cylindrical surface is an outer cylindrical surface of a superior arc, and the driving plane is a cylindrical surface with a superior arc. A chord tangent plane closed by the outer cylindrical surface, wherein the superior arc outer cylindrical surface is in close fit with the superior arc-shaped arc wall surface of the eccentric unit member, and the chord tangent plane is in close fit with the chord tangent wall surface of the eccentric unit member.
The air compressor equipped with the laminated eccentric shaft hole structure assembly according to claim 10, characterized in that: the air compressor is provided with a centrifugal balance block, and the centrifugal balance block is connected by rivets or/and The screw connection structure is tightly connected with the laminated eccentric shaft hole structure component.
The air compressor equipped with the laminated eccentric shaft hole structure assembly according to claim 10, wherein the air compressor is provided with a cooling fan, and the cooling fan is connected and matched with the rotating shaft of the air compressor. .