CN219012799U - Split type piston for air compressor - Google Patents

Abstract

The utility model discloses a split piston for an air compressor, which comprises a piston body and a guide piston, the guide piston is connected with the piston body through a fixing piece, and the guide piston is opened with a A positioning groove, the positioning groove is coaxial with the guide piston, the end of the piston body opposite to the guide piston is provided with a connecting protrusion, the connecting protrusion is coaxial with the piston body, and the connecting protrusion match the positioning slot. When machining the outer wall of the guide piston, it can be processed based on the positioning groove to ensure that the guide piston is coaxial with the positioning groove. The protrusions are coaxial, thereby further reducing the coaxiality error of the piston body and the pilot piston.

Description

Split type piston for air compressor

technical field

The utility model relates to the technical field of air compressors, in particular to a split piston for an air compressor.

Background technique

The split piston includes a piston body and a guide piston. Because the outer diameters of the piston body and the guide piston are quite different, the guide piston and the piston body are generally finished separately and then assembled together. In this way, although the coaxiality of the pilot piston and the piston body is within the allowable error range, if the coaxiality error of the pilot piston and the piston body is relatively large, it is easy to cause poor sealing and affect the displacement of the air compressor.

Utility model content

In order to solve the technical problems existing in the background technology, the utility model proposes a split piston for an air compressor.

The utility model proposes a split type piston for an air compressor, comprising a piston body and a guide piston, the guide piston is connected to the piston body through a fixing piece, and the end of the guide piston opposite to the piston body is opened with a A positioning groove, the positioning groove is coaxial with the guide piston, the end of the piston body opposite to the guide piston is provided with a connecting protrusion, the connecting protrusion is coaxial with the piston body, and the connecting protrusion match the positioning slot.

When machining the outer wall of the guide piston, it can be processed based on the positioning groove to ensure that the guide piston is coaxial with the positioning groove. The protrusions are coaxial, thereby further reducing the coaxiality error of the piston body and the pilot piston.

Preferably, the length of the connecting protrusion is smaller than the depth of the positioning groove.

Preferably, the end of the guide piston opposite to the piston body is provided with a processing boss, and the positioning groove is opened on the processing boss.

Preferably, the end of the piston body opposite to the guide piston has a contact end ring, the connecting protrusion is arranged on the contact end ring, and the contact end is also in contact with the processing boss.

In order to further increase the coaxiality of the piston body and the pilot piston, preferably, the opposite end of the pilot piston to the piston body has a positioning hole, the axis of the positioning hole is parallel to the axis of the pilot piston, The end of the piston body opposite to the guide piston is fixed with a positioning post, and the positioning post matches the positioning hole.

In order to further increase the coaxiality of the piston body and the guide piston, preferably, the positioning hole includes a first positioning hole and a second positioning hole, and the aperture of the first positioning hole is larger than the aperture of the second positioning hole, The positioning post includes a first positioning post and a second positioning post, the first positioning post matches the first positioning hole, and the second positioning post matches the second positioning hole.

In the utility model, the proposed split piston for air compressor has a simple structure. Through the setting of the positioning groove and the connecting protrusion, the positioning groove is coaxial with the guide piston, the connecting protrusion is coaxial with the piston body, and the positioning groove is connected with the connecting protrusion. The matching of the protrusions reduces the coaxiality error between the guide piston and the piston body and increases the displacement of the air compressor.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar symbols represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, but not to limit the present invention.

It is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated to ", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, Constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components , unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

A split piston for an air compressor as shown in Figure 1 includes a piston body 1 and a guide piston 2, the guide piston 2 is connected to the piston body 1 through a fixing member 7, and the fixing member has 7 fixing screws; the guide piston 2 and the The opposite end of the piston body 1 is provided with a positioning groove 20, the positioning groove 20 is coaxial with the guide piston 2, the opposite end of the piston body 1 and the guide piston 2 is provided with a connecting protrusion 10, and the connecting protrusion 10 is coaxial with the piston body 1, The connecting protrusion 10 is matched with the positioning groove 20;

When processing the outer wall of the guide piston 2, the positioning groove 20 can be used as a reference to process, to ensure that the guide piston 2 is coaxial with the positioning groove 20, and when processing the outer wall of the piston body 1 and the ring groove of the piston body 1, the connecting protrusion 10 The benchmark ensures that the piston body 1 is coaxial with the connecting protrusion 10, thereby further reducing the coaxiality error between the piston body 1 and the pilot piston 2.

In some embodiments, preferably, the end of the guide piston 2 opposite to the piston body 1 is provided with a processing boss 3, and the positioning groove 20 is provided on the processing boss 3, which is convenient for production and processing.

In order to increase the processing efficiency, in some embodiments, preferably, the end of the piston body 1 opposite to the guide piston 2 has a contact end ring 4, the connecting protrusion 10 is arranged on the contact end ring 4, and the contact end is also connected to the processing boss. 3 contact, the contact end ring 4 is in surface contact with the processing boss 3, and only the end face of the connecting end ring and the processing boss 3 needs to be finished.

In some embodiments, preferably, the length of the connecting protrusion 10 is shorter than the depth of the positioning groove 20, so as to ensure that the processing boss 3 is in conflict with the contact end ring 4, and reduce the coaxiality error between the piston body 1 and the guide piston 2.

In some embodiments, preferably, the end of the guide piston 2 opposite to the piston body 1 has a positioning hole 5, the axis of the positioning hole 5 is parallel to the axis of the guide piston 2, and the end of the piston body 1 opposite to the guide piston 2 is fixed with a positioning column. 6. The positioning post 6 is matched with the positioning hole 5. The positioning post 6 can be fixed on the piston body 1 by welding, clamping or sticking. In some embodiments, the end of the piston body 1 opposite to the guide piston 2 has a clamping joint hole, the positioning column 6 is clamped in the clamping hole, and the bottom of the positioning column 6 is in contact with the bottom of the clamping hole. The length of the positioning column 6 is greater than the length of the clamping hole and less than the sum of the length of the positioning hole 5 and the clamping hole, which is convenient Production and processing;

In some embodiments, preferably, the positioning hole 5 is not opened and processed on the boss 3 , and the positioning column 6 is installed on the contact end ring 4 .

Preferably in some embodiments, the positioning hole 5 includes a first positioning hole 50 and a second positioning hole 51, the aperture of the first positioning hole 50 is larger than the aperture of the second positioning hole 51, and the first positioning hole 50 and the second positioning hole 51 are mutually Alternately arranged on the processing boss 3, and distributed along the axis of the processing boss 3, the positioning column 6 includes a first positioning column 60 and a second positioning column 61, the first positioning column 60 matches the first positioning hole 50 , the second positioning post 61 matches the second positioning hole 51 .

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (6)

1. A split piston for an air compressor, comprising a piston body (1) and a guide piston (2), the guide piston (2) is connected with the piston body (1) by a fixture (7), and its characteristics In that, the opposite end of the guide piston (2) to the piston body (1) is provided with a positioning groove (20), the positioning groove (20) is coaxial with the guide piston (2), and the piston body (1) The end opposite to the guide piston (2) is provided with a connection protrusion (10), the connection protrusion (10) is coaxial with the piston body (1), and the connection protrusion (10) Match with the positioning groove (20). 2. The split piston for an air compressor according to claim 1, characterized in that, the length of the connecting protrusion (10) is smaller than the depth of the positioning groove (20). 3. The split piston for air compressor according to claim 1, characterized in that, the end of the guide piston (2) opposite to the piston body (1) is provided with a processing boss (3), the The positioning groove (20) is provided on the processing boss (3). 4. The split piston for air compressor according to claim 3, characterized in that, the end of the piston body (1) opposite to the guide piston (2) has a contact end ring (4), and the connection The protrusion (10) is arranged on the contact end ring (4), and the contact end ring (4) is in contact with the processing boss (3). 5. The split piston for air compressor according to claim 1, characterized in that, the end of the guide piston (2) opposite to the piston body (1) has a positioning hole (5), and the positioning The axis of the hole (5) is parallel to the axis of the guide piston (2), and the end of the piston body (1) opposite to the guide piston (2) is fixed with a positioning post (6), and the positioning post (6) Match with the positioning hole (5). 6. The split piston for air compressor according to claim 5, characterized in that, the positioning hole (5) comprises a first positioning hole (50) and a second positioning hole (51), and the first positioning hole (51) The aperture of the hole (50) is larger than the aperture of the second positioning hole (51), and the positioning post (6) includes a first positioning post (60) and a second positioning post (61), and the first positioning post (60) Matching with the first positioning hole (50), the second positioning post (61) matching with the second positioning hole (51).

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