Combined piston rod

Abstract

The utility model discloses a combined piston rod, which is characterized in that the two ends of the piston rod are milled into a first connecting structure and a second connecting structure which are seamless after being spliced, and each of the two connecting structures comprises two symmetrical 1 / 4 arc fan-shaped convex blocks; after splicing, bolts can be screwed into the screw holes of the first connecting structure and the second connecting structure to fix the first connecting structure and the second connecting structure, so that the length of the piston rod is increased or decreased, one end of the connecting piece is machined into the first connecting structure, and the second connecting structure of the piston rod can be easily assembled and disassembled. Meanwhile, the maintenance cost is reduced, and the connection strength is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of piston rod processing, in particular to a combined piston rod. Background Art

[0002] In the current industrial extruders, the extrusion barrel movement of most extruders is driven by a piston cylinder. Due to comprehensive considerations of cost, manufacturing, layout and other factors, except for small-tonnage extruders that use a mobile cylinder piston rod directly connected to the extrusion barrel assembly, medium and large extruders basically have an extended connecting rod fixed to the front end of the cylinder piston rod of the barrel, and connected to the extrusion barrel assembly through the extended connecting rod to avoid the piston rod being too long, which increases the difficulty of manufacturing and maintenance and increases the cost.

[0003] Most of the current piston rods are of an integrated structure, and the length of the piston rod cannot be increased to meet more needs. When the connection is damaged, the only option is to replace or repair the entire rod.

[0004] Application No.: CN01206238.3 proposes a combined piston rod, which consists of a rod body and a piston sleeve installed at one end thereof. When the piston sleeve used for connection is damaged, only the piston sleeve can be replaced to reduce maintenance costs.

[0005] However, this device is also unable to achieve the problem of lengthening the piston rod, and its assembly method is unclear, and its strength after installation is unknown. Summary of the invention

[0006] In order to increase or decrease the length of the piston rod, reduce the maintenance cost and ensure the connection strength, the utility model proposes a modular piston rod, whose structure includes: one or more modular rods assembled into one body, and a connecting piece installed at one end or both ends of the modular rod; the modular rod includes a rod body, and the two ends of the rod body are respectively a first connecting structure and a second connecting structure, the first connecting structure includes two fan-shaped protrusions arranged centrally and symmetrically with respect to the axis of the rod body, the inner and outer arcs of the fan-shaped protrusions are both 90°, and the curved surface of each fan-shaped protrusion is provided with a through screw hole, and the screw holes on the two fan-shaped protrusions are coaxial; the second connecting structure includes two fan-shaped protrusions arranged centrally and symmetrically with respect to the axis of the rod body and a cylinder integrated with the inner curved surfaces of the two fan-shaped protrusions, and the curved surface of the cylinder is provided with a radially through screw hole; the connecting piece includes: a connecting column, one end of the connecting column is provided with the first connecting structure, and the other end is provided with a connecting plate, and the connecting plate is provided with a mounting hole.

[0007] Preferably, the diameters of the first connecting structure and the connecting column of the connecting member are equal.

[0008] Preferably, after the first connecting structure is inserted into the second connecting structure, all screw holes of the two are coaxial and there is no gap between them.

[0009] Preferably, after the first connecting structure and the second connecting structure are assembled, the combined rods and the combined rods and the connecting members are fixed to each other and to each other by screwing bolts into screw holes.

[0010] The utility model processes the two ends of the piston rod by milling to form a first connection structure and a second connection structure which have no gaps after being assembled. Both connection structures include two symmetrical 1 / 4 arc fan-shaped protrusions. After being assembled, bolts can be used to screw into the screw holes of the first connection structure and the second connection structure to fix the two, thereby increasing or decreasing the length of the piston rod. One end of the connecting piece is processed into the first connection structure, and the second connection structure of the piston rod can be easily loaded and unloaded. The utility model has a wider application range than an integrated piston rod, and at the same time reduces maintenance costs and ensures connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a three-dimensional diagram of the combined piston rod.

[0013] Figure 2 This is a schematic diagram of the combined rod from the first perspective.

[0014] Figure 3 This is a schematic diagram of the combined rod from the second perspective.

[0015] Figure 4 This is a three-dimensional diagram of the connecting parts.

[0016] In the figure: 1, combined rod; 2, connecting member; 11, rod body; 12, fan-shaped protrusion; 13, cylinder; 14, screw hole; 21, connecting piece; 22, mounting hole; 23, connecting column. DETAILED DESCRIPTION

[0017] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0018] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0020] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0021] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0022] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. Example 1

[0023] like Figure 1-Figure 3As shown, the combined piston rod of the utility model comprises: two combined rods 1 assembled into one body, and a connecting member 2 installed at one end of one of the combined rods 1; the combined rod 1 comprises a rod body 11, and the two ends of the rod body 11 are respectively a first connecting structure and a second connecting structure, the first connecting structure comprises two fan-shaped protrusions 12 centrally symmetrically arranged relative to the axis of the rod body 11, the inner and outer arcs of the fan-shaped protrusions 12 are both 90°, and the curved surface of each fan-shaped protrusion 12 is provided with a through screw hole 14, and the screw holes 14 on the two fan-shaped protrusions 12 are coaxial; the second connecting structure comprises two fan-shaped protrusions 12 centrally symmetrically arranged relative to the axis of the rod body 11 and a cylinder 13 integral with the inner curved surfaces of the two fan-shaped protrusions 12, and the curved surface of the cylinder 13 is provided with a radially through screw hole 14; the connecting member 2 comprises: a connecting column 23, one end of the connecting column 23 is provided with a first connecting structure, and the other end is provided with a connecting sheet 21, and the connecting sheet 21 is provided with a mounting hole 22.

[0024] More specifically, the diameters of the first connection structure of the connection member 2 and the connection column 23 are equal.

[0025] More specifically, after the first connection structure is inserted into the second connection structure, all screw holes 14 of the two are coaxial and there is no gap between them.

[0026] More specifically, after the first connection structure and the second connection structure are assembled, the combined rods 1 and the combined rods 1 and the connection members 2 are fixed to each other by screwing bolts into the screw holes 14 .

[0027] The utility model processes the two ends of the piston rod by milling to form a first connecting structure and a second connecting structure which have no gaps after being assembled. Both connecting structures include two symmetrical 1 / 4 arc fan-shaped protrusions. After being assembled, bolts can be used to screw into the screw holes of the first connecting structure and the second connecting structure to fix the two, thereby realizing the increase or decrease of the length of the piston rod and the loading and unloading of the connecting parts. The utility model has a wider application range than an integrated piston rod, while reducing maintenance costs and ensuring connection strength.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined piston rod, characterized in that: include: One or more assembled combined rods, and connecting pieces installed at one or both ends of the combined rods; the combined rods include a rod body, and the two ends of the rod body are respectively a first connecting structure and a second connecting structure, the first connecting structure includes two fan-shaped protrusions centrally symmetrically arranged relative to the axis of the rod body, the inner and outer arcs of the fan-shaped protrusions are both 90°, and the curved surface of each fan-shaped protrusion is provided with a through screw hole, and the screw holes on the two fan-shaped protrusions are coaxial; the second connecting structure includes two fan-shaped protrusions centrally symmetrically arranged relative to the axis of the rod body and a cylinder integral with the inner curved surfaces of the two fan-shaped protrusions, and the curved surface of the cylinder is provided with radially through screw holes; the connecting piece includes: a connecting column, one end of the connecting column is provided with a first connecting structure, and the other end is provided with a connecting plate, and the connecting plate is provided with a mounting hole.

2. The combined piston rod according to claim 1, characterized in that: The first connection structure of the connection piece and the connection column have the same diameter.

3. The combined piston rod according to claim 2, characterized in that: After the first connecting structure is inserted into the second connecting structure, all screw holes of the two are coaxial and there is no gap between them.

4. The combined piston rod according to claim 3, characterized in that: After the first connecting structure and the second connecting structure are assembled, the combined rods and the combined rods and the connecting members are fixed to each other by screwing bolts into the screw holes.

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