Shaft head and graphite piece matched with same

Abstract

The utility model relates to a shaft head which comprises a cylindrical main body, a cylindrical connecting part is arranged at the front end of the main body, the diameter of the connecting part is smaller than that of the main body, external threads are arranged on the circumferential surface of the connecting part, two dismounting holes are further formed in the end face, far away from the main body, of the connecting part, and the axes of the dismounting holes are parallel to the axis of the connecting part. The connecting part and the graphite piece are in threaded connection, meanwhile, contact surfaces are tightly attached, the graphite piece is not loosened relative to the shaft head in the using process through the dual functions of threaded connection and friction, the defects of an original connecting mode are overcome, the replacement frequency can be reduced, the production cost is saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of single crystal rod production technology, specifically to a shaft head and a graphite part that mates with the shaft head. Background Technology

[0002] When pulling single crystal rods in a single crystal furnace, the graphite components used are connected to the equipment shaft head, and the equipment drives the graphite components to complete the processing.

[0003] Currently, the connection between the graphite component and the shaft head is achieved by screwing a bolt through the graphite component and into the shaft head for tightening. This causes the graphite component to shift and rotate relative to the connecting structure if the bolt loosens even slightly during equipment operation, resulting in the equipment malfunctioning. Therefore, this application proposes a shaft head and a graphite component that mates with the shaft head. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a shaft head and a graphite component that mates with the shaft head. The specific technical solution is as follows:

[0005] A shaft head includes a cylindrical body, a cylindrical connecting part at the front end of the body, the diameter of the connecting part being smaller than the diameter of the body, an external thread on the circumferential surface of the connecting part, and two disassembly holes on the end face of the connecting part away from the body, the axis of the disassembly holes being parallel to the axis of the connecting part.

[0006] Furthermore, the disassembly hole has internal threads.

[0007] Furthermore, the step surface between the main body and the connecting part is a plane perpendicular to the axis of the main body, and the roughness of the step surface is Ra3.2~Ra6.3.

[0008] Furthermore, there is a gap between the external thread end closest to the step surface and the step surface.

[0009] A graphite component is used in conjunction with the aforementioned shaft head. The graphite component has an internal thread that mates with the external thread on the connecting part. During installation, the graphite component is rotated until it fits against the stepped surface.

[0010] The beneficial effects of this utility model are as follows:

[0011] The connection between the connecting part and the graphite part is made by thread, and the contact surfaces fit tightly. The combined effect of the threaded connection and friction ensures that the graphite part does not become loose relative to the shaft head during use. This eliminates the drawbacks of the original connection method, reduces the number of replacements, saves production costs, and improves production efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the shaft head described in this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the graphite component described in this utility model.

[0015] In the diagram: 1. Main body; 2. Graphite component; 3. Connecting part; 4. Disassembly hole; 5. Stepped surface. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] The present invention provides the following specific implementation scheme:

[0018] like Figure 1-2 As shown, this utility model provides a shaft head, including a cylindrical body 1, a cylindrical connecting part 3 at the front end of the body 1, the diameter of the connecting part 3 being smaller than the diameter of the body 1, an external thread on the circumferential surface of the connecting part 3, and two disassembly holes 4 on the end face of the connecting part 3 away from the body 1, the axis of the disassembly holes 4 being parallel to the axis of the connecting part 3.

[0019] Furthermore, the disassembly hole 4 has an internal thread, which facilitates the disassembly and replacement of the shaft head.

[0020] Furthermore, the step surface 5 between the main body 1 and the connecting part 3 is a plane perpendicular to the axis of the main body 1, and the roughness of the step surface 5 is Ra3.2~Ra6.3. After installation, the step surface 5 can form frictional contact with the graphite part 2.

[0021] Furthermore, there is a gap between the end of the external thread closest to the step surface 5 and the step surface 5.

[0022] A graphite component is used in conjunction with the aforementioned shaft head. The graphite component 2 has an internal thread that mates with the external thread on the connecting part 3. During installation, the graphite component 2 is fitted onto the connecting part 3, and the graphite component 2 is rotated until it fits against the stepped surface 5.

[0023] The connection between the connecting part 3 and the graphite part 2 is made by threaded connection, and the contact surfaces fit tightly. Under the dual effect, the graphite part 2 no longer loosens relative to the shaft head during use, eliminating the drawbacks of the original connection method and improving production efficiency.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A shaft head, characterized in that: It includes a cylindrical main body, a cylindrical connecting part at the front end of the main body, the diameter of the connecting part is smaller than the diameter of the main body, the circumferential surface of the connecting part is provided with external threads, and two disassembly holes are also opened on the end face of the connecting part away from the main body, the axis of the disassembly holes is parallel to the axis of the connecting part.

2. The shaft head according to claim 1, characterized in that: The disassembly hole has internal threads.

3. A shaft head according to claim 1, characterized in that: The step surface between the main body and the connecting part is a plane perpendicular to the axis of the main body, and the roughness of the step surface is Ra3.2~Ra6.

3.

4. A shaft head according to claim 3, characterized in that: There is a gap between the end of the external thread closest to the step surface and the step surface.

5. A graphite component, characterized in that: When used in conjunction with the shaft head as described in any one of claims 1-4, the graphite part has an internal thread that mates with the external thread on the connecting part. During installation, the graphite part is rotated until it fits against the stepped surface.

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