Threading cylinder capable of replacing threading die specification
By adopting a split threading spool design and a detachable die structure, the problems of inconvenient replacement, carrying, and maintenance of traditional threading spools are solved, achieving efficient and economical thread processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 卢欣欣
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional threading spool structures result in inconvenient die replacement, inconvenient carrying, poor versatility, and difficult maintenance, as well as high costs.
A split structure comprising a left and a right sleeve is designed and fixedly connected by screws. It accommodates a removable die inside the cavity, supports the replacement of dies of different specifications, and uses a hexagonal prism-shaped mating part to enhance the engagement with the electric wrench.
It enables convenient die replacement, reduces usage costs, improves thread processing efficiency and accuracy, and simplifies the maintenance process.
Smart Images

Figure CN224115337U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tapping tools, specifically a tapping spool that can change the size of the die. Background Technology
[0002] Currently, in the fields of machining and equipment maintenance, threading spools are commonly used manual or motorized tools for cutting external threads on metal bars or pipes.
[0003] Traditional threading spools typically employ a one-piece structure, which often presents the following problems:
[0004] Die replacement is inconvenient: The one-piece structure makes it impossible to replace the die. After damage, a new threading spool needs to be replaced. Moreover, each die size comes with one spool, so when carrying it, a large number of spare or different sizes of threading spools must be carried, which increases the weight, takes up space, and is inconvenient to carry.
[0005] Poor versatility: Most threading spools are only compatible with dies of specific sizes. If different sizes of threads need to be machined, multiple threading spools are required, which increases tooling costs and storage burden.
[0006] Maintenance difficulties: Due to the enclosed structure, metal shavings generated during the cutting process tend to accumulate in the die groove, making cleaning inconvenient and potentially affecting the thread machining accuracy over long-term use.
[0007] To solve the above problems, there is an urgent need for a threading spool with a simple structure and easy-to-replace dies, so as to improve thread processing efficiency and reduce usage costs. Utility Model Content
[0008] The present invention aims to solve the technical problems existing in the prior art and provide a threading spool that can change the die specifications.
[0009] A threading spool capable of changing die specifications includes a left sleeve and a right sleeve. Both the left and right sleeves include a cylinder, a mating part, and a circular through hole penetrating the cylinder and the mating part. The cylinder of the left sleeve is connected to the cylinder of the right sleeve by screws. A receiving cavity is provided at the joint of the two mating cylinders. A die for tapping is provided in the receiving cavity. The die is detachably fixed in the receiving cavity.
[0010] Furthermore, the die is fixed to one of the cylinders by screws.
[0011] Furthermore, the cylinder and the docking part are integrally formed.
[0012] Furthermore, the docking component is hexagonal prism shaped.
[0013] Compared with the prior art, the present invention has the following advantages: The present invention has a reasonable structure. Through the detachable die structure and the split sleeve design, it solves the pain points of the traditional threading spool having fixed specifications, difficult maintenance, and inconvenient carrying, and has high practicality and economy.
[0014] With its split design of left and right sleeves and screw fixing method, the receiving cavity can be quickly opened to replace die parts of different specifications, significantly improving work efficiency and adapting to various thread processing needs.
[0015] The hexagonal prism-shaped connector design enhances the engagement with the electric wrench tool, preventing slippage during operation. The one-piece molded cylinder and connector ensure structural strength and guarantee tapping accuracy.
[0016] The die is individually fixed with screws, so when it is damaged, only the die needs to be replaced instead of the entire sleeve, thus reducing the cost of use;
[0017] The split design makes it easy to clean and maintain the internal debris. Attached Figure Description
[0018] Figure 1 This is a cross-sectional schematic diagram of a threading spool capable of changing die specifications according to this utility model;
[0019] Figure 2 This is a three-dimensional schematic diagram of a threading spool capable of changing die specifications according to this utility model;
[0020] Figure 3 This is a schematic diagram illustrating the use of a threading spool capable of changing die specifications according to this utility model. Detailed Implementation
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] In the description of the embodiments of this utility model, if a feature is referred to as "setting", "fixing", "connecting", or "installing" on another feature, it can be set, fixed, or connected directly to the other feature, or it can be set, fixed, connected, or installed indirectly on the other feature.
[0024] In the description of the embodiments of this utility model, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.
[0025] The following description, with reference to the accompanying drawings, illustrates an embodiment of the present invention using a threading spool capable of changing die specifications.
[0026] like Figure 1 and Figure 2 As shown, a threading spool capable of changing die specifications includes a left spool and a right spool. Both the left and right spools include a cylinder 1, a mating part 2, and a circular through hole 3 penetrating the cylinder 1 and the mating part 2. The cylinder 1 of the left spool and the cylinder 1 of the right spool are connected and fixedly connected by screws 6. A receiving cavity 4 is provided at the mating point of the two mating cylinders 1. A die 5 for tapping is provided in the receiving cavity 4. The die 5 is detachably fixed in the receiving cavity 4.
[0027] The die 5 is fixed to one of the cylinders 1 by screws 6.
[0028] The cylinder 1 and the docking part 2 are integrally formed.
[0029] The connecting piece 2 is hexagonal prism shaped, which facilitates the connection of the external internal hexagonal sleeve.
[0030] In practical use, this utility model, such as Figure 3 As shown, a method of use is provided. This utility model is used to repair the threads of a screw on a concrete base. The utility model is fitted onto the screw through the circular through hole 3, the die 5 is aligned with the screw, and the hexagonal prism-shaped mating part 2 away from the screw is connected to an electric drill through an internal hexagonal sleeve. Starting the electric drill will drive the utility model to rotate and repair the threads of the screw.
[0031] This invention solves the problems of fixed specifications and difficult maintenance of traditional threading spools, and is especially suitable for operation scenarios that require switching thread specifications, with high practicality and economy.
[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A die set changeable thread chasing die stock characterized by: It includes a left sleeve and a right sleeve. Both the left sleeve and the right sleeve include a cylinder, a mating part, and a circular through hole penetrating the cylinder and the mating part. The cylinder of the left sleeve is connected to the cylinder of the right sleeve by screws. The mating part of the two mating cylinders is provided with a receiving cavity. The receiving cavity is provided with a die for tapping. The die is detachably fixed in the receiving cavity.
2. The die set changeable thread chasing die stock according to claim 1, characterized in that: The die is fixed to one of the cylinders by screws.
3. A threading spool capable of changing die specifications according to claim 1, characterized in that: The cylinder and the docking part are integrally formed.
4. A threading spool capable of changing die specifications according to claim 1, characterized in that: The docking component is hexagonal prism shaped.