Thread core structure with adjustable initial thread position and thread mold

Abstract

The utility model discloses a thread core structure with an adjustable initial thread position and a thread mold, the thread core structure comprises a thread core, a central shaft rod and a fixing pin, and the thread core and the central shaft rod are axially, detachably and coaxially connected and matched by utilizing the fixing pin; the tooth core is provided with a circular inserting groove; the central shaft rod protrudes to form a cylindrical inserting part, and the inserting part is inserted into the inserting groove; a plurality of grooves are concavely formed in the end surface of the slot end at uniform intervals in the circumferential direction; at least one convex tooth protrudes from the side wall of the inserting part in the radial direction, and when the inserting part is inserted into the inserting groove, the convex tooth is embedded into the groove; therefore, the thread core and the central shaft rod can be embedded in the grooves in different positions through the adjusting convex teeth, the thread machining initial position of the thread part of the thread core can be adjusted, namely, the thread initial tooth position of a product can be freely adjusted, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of screw thread moulds, in particular to a thread core structure with adjustable starting thread positions and a screw thread mould. Background Art

[0002] Injection molding is a processing method used in mass production of certain parts. The specific steps are to inject the heated and molten material into the mold cavity by high pressure, and obtain the molded product after cooling and solidification. If the injection molded product needs to be processed with internal threads, the completed injection molded product needs to be put back into the tapping machine for tapping. However, since the initial position and angle of the thread core on the existing tapping machine are fixed, it is difficult to adjust the starting position of the thread tapped by the thread part of the thread core, which is difficult to meet the requirements of different products or the same product for different starting positions. Utility Model Content

[0003] The utility model aims to provide a thread core structure and a thread die with adjustable thread start tooth position, which can process thread start teeth in different positions for different products and has the advantages of simple structure and convenient operation.

[0004] In order to achieve the above purpose, the solution of the utility model is:

[0005] A thread core structure with adjustable thread start position, comprising a thread core, a central shaft and a fixing pin, wherein the thread core and the central shaft are axially detachably coaxially connected and matched;

[0006] One end of the thread core facing the central shaft is a slot end, a circular insertion groove is recessed in the middle of the slot end, and the other end of the thread core is a threaded portion with an external thread;

[0007] The end of the central shaft facing the tooth core is a plug-in end, and a cylindrical plug-in portion protrudes from the middle of the plug-in end, and the plug-in portion is plugged into the plug-in slot;

[0008] The end surface of the slot end is provided with a plurality of grooves evenly spaced in the circumferential direction, each groove being radially connected to the plug-in slot;

[0009] The side wall of the plug-in portion is radially protruded with at least one protruding tooth, and when the plug-in portion is inserted into the plug-in groove, the protruding tooth is embedded in the groove;

[0010] The side wall of the plug-in portion is also radially concave with a circle of annular groove, and the side wall of the plug-in groove is provided with a plug hole corresponding to the annular groove, the plug hole is radially connected to the outer wall of the tooth core, and the fixing pin is passed through the plug hole and extends into the annular groove.

[0011] Furthermore, the convex teeth are fitted and connected to the end surface of the plug-in portion.

[0012] Furthermore, the annular groove is away from the end surface of the plug-in portion and is axially spaced from the convex tooth.

[0013] Furthermore, there are more than five protruding teeth, and the circumferential interval between two adjacent protruding teeth is 15°.

[0014] Furthermore, the number of the protruding teeth is consistent with the number of the grooves; the protruding teeth are rectangular bodies, and the corresponding grooves are rectangular grooves.

[0015] Furthermore, an indicator recess is provided on the inner side of the screw thread portion close to the slot end, and the indicator recess is located at the starting position of screw thread processing of the screw thread portion.

[0016] Furthermore, there are two jacks that are centrally symmetrical, and there are also two corresponding fixing pins.

[0017] Furthermore, the other end of the central shaft relative to the plug-in end is the mounting end, which is radially retracted to form a mounting step between the mounting end and the plug-in end; the side wall of the plug-in end is recessed with a one-way tooth to prevent reversal.

[0018] Furthermore, an axial hole extending axially through the tooth core and the middle of the central shaft is provided.

[0019] The utility model also provides a screw thread mold, comprising the thread core structure.

[0020] After adopting the above technical scheme, the circumferential angle of the thread core and the center shaft can be adjusted by adjusting the convex teeth to engage in grooves at different positions. Therefore, after the thread core structure is assembled on the thread mold and before tapping, the starting position of the thread processing of the thread part of the thread core can be adjusted by adjusting the angle of the thread core and the center shaft fixed to the thread mold. That is, the starting position of the product thread can be freely adjusted, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a tooth core structure according to an embodiment of the present utility model;

[0022] Figure 2 This is an exploded view of the tooth core structure of an embodiment of the utility model (I);

[0023] Figure 3 This is an exploded view of the tooth core structure of an embodiment of the utility model (II);

[0024] Figure 4 A top perspective view of a tooth core structure according to an embodiment of the present utility model;

[0025] Figure 5 A cross-sectional view of a tooth core structure according to an embodiment of the present utility model;

[0026] Figure 6 A three-dimensional diagram of a screw thread mold according to an embodiment of the present utility model;

[0027] Figure 7 It is a partial structural exploded view of the screw thread mold according to an embodiment of the utility model.

[0028] Explanation of the reference numerals: core structure 10, core 1, slot end 11, plug-in slot 12, screw thread portion 13, groove 14, socket 15, indicator recess 16, central shaft 2, plug-in end 21, plug-in portion 22, convex tooth 23, annular groove 24, mounting end 25, mounting step 26, one-way tooth 27, fixing pin 3, axial hole 4, screw thread mold 20, pawl 201, spring 202, shaft 203. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] like Figures 1 to 5 As shown, a thread core structure 10 with adjustable thread starting tooth position of the utility model comprises a thread core 1, a central shaft 2 and a fixing pin 3. The thread core 1 and the central shaft 2 can be axially detachably coaxially connected by using the fixing pin 3.

[0031] The end of the thread core 1 facing the central shaft 2 is a slot end 11, and a circular plug-in groove 12 is recessed in the middle of the slot end 11. The other end of the thread core 1 is a screw thread portion 13 with an external thread. The end of the central shaft 2 facing the thread core 1 is a plug-in end 21, and a cylindrical plug-in portion 22 protrudes from the middle of the plug-in end 21. The plug-in portion 22 is inserted into the plug-in groove 12. The end surface of the slot end 11 is evenly spaced in the circumferential direction and has a plurality of grooves 14, each of which is radially connected to the plug-in portion 13. Groove 12; the side wall of the plug-in part 22 radially protrudes with at least one convex tooth 23, and when the plug-in part 22 is inserted into the plug-in groove 12, the convex tooth 23 is embedded in the groove 14; the side wall of the plug-in part 22 also has a circle of radially concave annular groove 24, and the side wall of the plug-in groove 12 is provided with a plug hole 15 corresponding to the annular groove 24, and the plug hole 15 is radially connected to the outer wall of the tooth core 1, and the fixing pin 3 is penetrated by the plug hole 15 and extends into the annular groove 24 to realize the axial limit fixation of the tooth core 1 and the central shaft 2.

[0032] In this way, the thread core 1 and the central shaft 2 can adjust the circumferential angle of the thread core 1 and the central shaft 2 by adjusting the convex teeth 23 to fit in the grooves 14 at different positions. Therefore, after the thread core structure 10 is assembled on the screw thread mold 20 described below, before tapping, by adjusting the angle of the thread core 1 and the central shaft 2 fixed to the screw thread mold 20, the thread processing starting position of the thread portion 13 of the thread core 1 can be adjusted, that is, the product thread starting position can be freely adjusted, and the operation is simple and convenient. When replacing, only the fixing pin 3 needs to be taken out, the thread core 1 can be separated from the central shaft 2 and the screw thread mold 20, and the thread core 1 can be rotated to a suitable angle and then reconnected with the central shaft 2. After ensuring that the rotated convex teeth 23 are embedded in the new groove 14, the fixing pin 3 is inserted to complete the angle change and connection fixation of the thread core 1 and the central shaft 2.

[0033] like Figure 2 and Figure 4 As shown, in this embodiment, the protruding teeth 23 are rectangular bodies, the corresponding grooves 14 are rectangular grooves, and the protruding teeth 23 are fitted and connected to the end surface of the plug-in portion 22 to enhance the structural strength of the protruding teeth 23 and ensure the circumferential limit stability of the tooth core 1 and the central shaft 2.

[0034] Meanwhile, in this embodiment, the number of the protruding teeth 23 is more than five, and the circumferential interval between two adjacent protruding teeth 23 is 15°. Of course, the number of the protruding teeth 23 can also be consistent with the number of the grooves 14.

[0035] The annular groove 24 is far away from the end surface of the plug-in portion 22 and is axially spaced from the protruding teeth 23, which is convenient for production and processing.

[0036] like Figure 3 and Figure 5 As shown, there are two axially symmetrical insertion holes 15, and two corresponding fixing pins 3, so as to strengthen the axial limiting stability of the tooth core 1 and the central shaft 2, and maintain the convenience of disassembly and installation.

[0037] like Figure 1 As shown, in order to facilitate intuitive adjustment of the relative positions of the thread core 1 and the central shaft 2, an indicator recess 16 is provided on the inner side of the thread portion 13 close to the slot end 11 in this embodiment, and the indicator recess 16 is located at the starting position of the thread processing of the thread portion 13.

[0038] like Figure 5 and Figure 7As shown, the other end of the central shaft 2 opposite to the plug end 21 is a mounting end 25, which is radially retracted to form a mounting step 26 with the plug end 21; a one-way tooth 27 for anti-reversal is recessed on the side wall of the plug end 21. After the thread core structure 10 is installed on the screw thread mold 20, a ratchet 201 and a spring 202 are provided on the screw thread mold 20. The ratchet 201 is engaged with the one-way tooth 27 by the spring 202 to ensure that the central shaft 2 rotates in one direction. In this embodiment, the ratchet 201 can limit and prevent the central shaft 2 and the thread core 1 from rotating counterclockwise.

[0039] See also Figure 5 The thread core 1 and the central shaft rod 2 are provided with an axially penetrating shaft hole 4 in the middle thereof, so as to allow the shaft rod 203 of the screw thread mold 20 to pass through, so as to facilitate the fixing of the product.

[0040] like Figure 6 and Figure 7 As shown, the utility model also provides a screw thread mold 20, which includes two thread core structures 10. Batch tapping production can be achieved, and the thread starting position of the produced product is adjustable.

[0041] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0042] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0043] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

Claims

1. A thread core structure with adjustable thread starting thread position, characterized in that: It includes a thread core, a central shaft and a fixing pin, wherein the thread core and the central shaft are axially detachably coaxially connected and matched; One end of the thread core facing the central shaft is a slot end, a circular insertion groove is recessed in the middle of the slot end, and the other end of the thread core is a threaded portion with an external thread; The end of the central shaft facing the tooth core is a plug-in end, and a cylindrical plug-in portion protrudes from the middle of the plug-in end, and the plug-in portion is plugged into the plug-in slot; The end surface of the slot end is provided with a plurality of grooves at even intervals in the circumferential direction, each groove being radially connected to the plug-in slot; The side wall of the plug-in portion is radially protruded with at least one protruding tooth, and when the plug-in portion is inserted into the plug-in groove, the protruding tooth is embedded in the groove; The side wall of the plug-in portion is also radially concave with a circle of annular groove, and the side wall of the plug-in groove is provided with a plug hole corresponding to the annular groove, the plug hole is radially connected to the outer wall of the tooth core, and the fixing pin is passed through the plug hole and extends into the annular groove.

2. A thread core structure with adjustable thread starting tooth position according to claim 1, characterized in that: The convex teeth are fitted and connected to the end surface of the plug-in portion.

3. A thread core structure with adjustable thread starting tooth position according to claim 2, characterized in that: The annular groove is away from the end surface of the plug-in portion and is axially spaced from the protruding teeth.

4. A thread core structure with adjustable thread starting tooth position according to claim 1, characterized in that: There are more than five protruding teeth, and the circumferential interval between two adjacent protruding teeth is 15°.

5. The thread core structure with adjustable thread starting thread position according to claim 1, characterized in that: The number of the protruding teeth is consistent with the number of the grooves; the protruding teeth are rectangular bodies, and the corresponding grooves are rectangular slots.

6. The thread core structure with adjustable thread starting thread position according to claim 1, characterized in that: An indicating recess is arranged on the inner side of the screw thread portion close to the slot end, and the indicating recess is located at the starting position of screw thread processing of the screw thread portion.

7. The thread core structure with adjustable thread starting tooth position according to claim 1, characterized in that: The number of the inserting holes is two and the number of the corresponding fixing pins is two.

8. The thread core structure with adjustable thread starting thread position according to claim 1, characterized in that: The other end of the central shaft relative to the plug-in end is the installation end, which is radially contracted to form an installation step between the installation end and the plug-in end; the side wall of the plug-in end is concavely provided with a one-way tooth for preventing reverse rotation.

9. The thread core structure with adjustable thread starting tooth position according to claim 1, characterized in that: The tooth core and the middle part of the central shaft rod are provided with an axially penetrating axial hole.

10. A screw thread die, characterized in that: Comprising the tooth core structure as described in any one of claims 1-9.

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