Piston rod connecting mechanism

Abstract

The utility model discloses a piston rod connecting mechanism which comprises a connector fixed at one end or two ends of a piston rod, one end, far away from the piston rod, of the connector is provided with a regular hexagonal boss, three opposite surfaces of the boss are respectively provided with a through pin hole, a through screw hole and a round rod, and the pin hole and the screw hole have an intersection point. The utility model has the advantages of wider application range and convenience in installation.

Description

Technical Field

[0001] The utility model relates to the field of piston rod processing, in particular to a piston rod connecting mechanism. 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] At present, the connection between the piston rod of the extrusion cylinder moving cylinder and the extended connecting rod at its front end mainly adopts the method of matching the internal thread of the extended connecting rod with the external thread of the piston rod. However, this method has the following problems during use: 1. The thread anti-loosening is not ideal. The use of set screws to prevent loosening will either damage the thread or the anti-loosening is unreliable; the use of matching baffles to prevent loosening is not only inconvenient to match, but also requires re-matching when replacing related parts. 2. The processing of the connecting rod is costly. In order to offset the strength loss caused by the internal thread and reduce weight and force at the same time, the connecting rod usually adopts a T-shaped structure with a very short large diameter end. This stepped shaft structure causes an increase in processing volume and material waste. 3. Inconvenient disassembly and assembly. Due to structural limitations, when the connecting rod needs to be disassembled and assembled, the method of fixing the piston rod and rotating the connecting rod must be adopted. The connecting rods of medium and large extruders are large in size and weight, and the disassembly and assembly process is time-consuming and labor-intensive, extremely inconvenient and easy to damage the thread.

[0004] To this end, application number: CN201920799379.5 proposes a connecting device between a piston rod and a connecting rod to simplify the difficulty of disassembly and assembly of the piston rod and reduce costs.

[0005] Since the piston rod needs to be connected to the piston, and sometimes also needs to be connected to a connecting rod or other connecting parts for lengthening or driving, the connection structures of these connecting parts are different, so a universal and easy-to-install connection structure is needed. Utility Model Content

[0006] In order to enable the piston rod to match with pistons and connectors of various connection structures and facilitate installation, the utility model proposes a piston rod connection mechanism, whose structure includes: a connecting head fixed to one end or both ends of the piston rod, and the end of the connecting head away from the piston rod is provided with a regular hexagonal boss, and the three opposite surfaces of the boss are respectively provided with a through pin hole, a through screw hole, and a round rod, and the pin hole and the screw hole have an intersection.

[0007] Preferably, the distances between the pin hole, screw hole, round rod and the top of the boss are equal everywhere, and the axes of the pin hole, screw hole and round rod are perpendicular to the planes on which they are arranged.

[0008] Preferably, the axes of the pin hole, the screw hole and the round rod intersect and are perpendicular to the axis of the boss.

[0009] When installing a piston or other connecting parts, the utility model can use bolts to cooperate with the screw holes of the boss to achieve a fixed connection, use a fixing pin to cooperate with the pin hole of the boss to achieve a movable connection, or use a clamp or a clamp to cooperate with a round rod to achieve a movable connection. The utility model has a wider application range and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 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.

[0011] Figure 1 It is a three-dimensional diagram of the utility model.

[0012] Figure 2 It is a front view of the utility model.

[0013] Figure 3 It is a top view of the utility model.

[0014] In the figure: 1. Connector; 2. Boss; 3. Pin hole; 4. Screw hole; 5. Round rod. DETAILED DESCRIPTION

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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

[0021] like Figure 1-Figure 3 As shown, the piston rod connection mechanism of the utility model comprises: a connector 1 fixed to one or both ends of the piston rod, a regular hexagonal boss 2 is provided at the end of the connector 1 away from the piston rod, three opposite surfaces of the boss 2 are respectively provided with a through pin hole 3, a through screw hole 4, and a round rod 5, and the pin hole 3 and the screw hole 4 have an intersection.

[0022] More specifically, the distances between the pin hole 3, the screw hole 4, the round rod 5 and the top of the boss 2 are always equal, and the axes of the pin hole 3, the screw hole 4, the round rod 5 are perpendicular to the planes on which they are arranged.

[0023] More specifically, the axes of the pin hole 3 , the screw hole 4 , and the round rod 5 intersect and are perpendicular to the axis of the boss 2 .

[0024] When installing a piston or other connecting parts, the utility model can use bolts to cooperate with the screw holes of the boss to achieve a fixed connection, use a fixing pin to cooperate with the pin hole of the boss to achieve a movable connection, or use a clamp or a clamp to cooperate with a round rod to achieve a movable connection. The utility model has a wider application range and is easy to install.

[0025] 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 piston rod connection mechanism, characterized in that: include: A connector fixed to one or both ends of a piston rod, wherein a regular hexagonal boss is provided at one end of the connector away from the piston rod, and three opposite faces of the boss are respectively provided with a through pin hole, a through screw hole, and a round rod, and the pin hole and the screw hole have an intersection.

2. The piston rod connection mechanism according to claim 1, characterized in that: The distances between the pin hole, the screw hole, the round rod and the top of the boss are equal everywhere, and the axes of the pin hole, the screw hole and the round rod are perpendicular to the planes on which they are arranged.

3. The piston rod connection mechanism according to claim 2, characterized in that: The axes of the pin hole, the screw hole and the round rod intersect and are perpendicular to the axis of the boss.

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