Pipe expander using split type main shaft assembly

Abstract

The utility model discloses a pipe expander using a split type main shaft assembly. The pipe expander comprises a shell, a driving mechanism, the main shaft assembly and a working head. The shell is provided with a base and a top seat, the top seat is fixed on the base, a battery and a motor are arranged in the base, the driving mechanism and the main shaft assembly are arranged in the top seat, and the driving mechanism comprises an eccentric wheel and a pushing wheel; the eccentric wheel is matched with a motor in the base, the pushing wheel is matched with the eccentric outer contour of the eccentric wheel, the pushing wheel is fixedly matched with the main shaft assembly, and the main shaft assembly is of a split structure and comprises a replacement head and a fixing sleeve. One end of the fixing sleeve is fixed with the pushing wheel, an internal thread and a cavity are arranged in the fixing sleeve, and the diameter of the cavity is larger than that of the internal thread. According to the technical scheme, the structural design of internal components of the pipe expander is optimized, and the use cost of the pipe expander is reduced.

Description

Technical Field

[0001] The utility model relates to an electric tool, in particular to a tube expander adopting a split spindle assembly. Background Art

[0002] The tube expander is a kind of electric tool, which is mainly designed with components such as battery, drive, shell, spindle head, and working head. The spindle head is driven to act on the working head by lateral extrusion, so that the working head turns outward at a certain angle to expand the tube. The above-mentioned extrusion is mainly achieved by friction between the spindle head and the working head, so that the spindle head needs to be replaced after a period of use, resulting in a high cost of using the tube expander.

[0003] After searching, there is currently no corresponding technical solution to this problem. Utility Model Content

[0004] The utility model aims to provide a tube expander using a split spindle assembly, and solves the technical problem of optimizing the structural design of the internal components of the tube expander and reducing the use cost of the tube expander.

[0005] The tube expander using a split spindle assembly comprises a shell, a driving mechanism, a spindle assembly and a working head; the shell is provided with a base and a top seat, the top seat is fixed on the base, a battery and a motor are arranged in the base, the driving mechanism and the spindle assembly are arranged in the top seat, the driving mechanism comprises an eccentric wheel and a pushing wheel; the eccentric wheel cooperates with the motor in the base, the pushing wheel cooperates with the eccentric outer contour of the eccentric wheel, the pushing wheel is fixedly matched with the spindle assembly, the spindle assembly is a split structure, comprising a replacement head and a fixed sleeve; one end of the fixed sleeve is fixed with the pushing wheel, the fixed sleeve has an internal thread and a cavity inside, the diameter of the cavity is greater than the diameter of the internal thread; the end of the replacement head facing the fixed sleeve has a threaded portion and an axial portion, wherein the axial portion is a circular shaft structure and cooperates with the cavity of the fixed sleeve, the threaded portion has an external thread that is screwed with the internal thread of the fixed sleeve; the position where the replacement head cooperates with the working head is a conical surface, and the working head has a corresponding conical surface inside.

[0006] The top seat comprises a top cover and a bottom cover; the bottom cover is fixed on the base, and both the top cover and the bottom cover have openings and cavities at matching positions, and the top cover and the bottom cover are mutually enclosed to form the cavity of the top seat.

[0007] The pushing wheel is sleeved with a pin, and a pin seat with a notch is provided at a corresponding position of the fixing sleeve, and both ends of the pin are arranged on the pin seat.

[0008] The fixing sleeve also has a cylindrical portion and an annular portion; the internal thread and the cavity are arranged in the cylindrical portion, the annular portion is between the cylindrical portion and the pin seat, and the diameter of the annular portion is greater than the diameter of the cylindrical portion.

[0009] The beneficial effects of the utility model are as follows: by designing a replacement head and a fixed sleeve, the replacement head is designed with an axial portion and an external thread, so that the axial positioning and fixation with the fixed sleeve can be maintained; the replacement head can be replaced as needed, so that when replacing, the original fixed sleeve is retained, and only the replacement head needs to be replaced. By designing the pin seat of the fixed sleeve, the stable telescopic action of the main shaft assembly is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of a tube expander;

[0011] Figure 2 is a schematic diagram of the top cover;

[0012] Figure 3 yes Figure 1 Schematic diagram of the tube expander with the top cover removed;

[0013] Figure 4 yes Figure 3 Exploded diagram of the tube expander;

[0014] Figure 5 This is a schematic diagram of the spindle assembly after disassembly;

[0015] Figure 6 is a schematic diagram of the replacement head;

[0016] Figure 7 is a schematic diagram of the fixed sleeve;

[0017] In the figure

[0018] 1. Shell, 11. Base, 12. Top seat, 121. Top cover, 122. Bottom cover, 13. Button;

[0019] 2. Driving mechanism, 21. Eccentric wheel, 22. Push wheel, 23. Pin;

[0020] 3. spindle assembly, 31. replacement head, 311. conical surface, 312. axial portion, 313. threaded portion, 32. fixed sleeve, 321. pin seat, 3211. notch, 322. cylindrical portion, 323. annular portion;

[0021] 4. Working head. DETAILED DESCRIPTION

[0022] Please refer to Figures 1 to 7The tube expander using a split spindle assembly 3 in the figure is designed with a shell 1, a driving mechanism 2, a spindle assembly 3, and a working head 4; the shell 1 is used to support and fix other components, the driving mechanism 2 is used to make the spindle assembly 3 perform lateral telescopic action, the spindle assembly 3 is used to drive the working head 4 to expand the tube when performing the telescopic action, and the working head 4 is used to expand the tube of the object to be expanded. In practical applications, the above components can be re-optimized.

[0023] The shell 1 in the figure belongs to the external part of the original expander. The shell 1 is composed of parts that are split in half horizontally. The interior of the shell 1 is a cavity structure, so as to accommodate components such as motors and batteries. The shell 1 is designed with a base 11 and a top seat 12 as shown in the figure, wherein the top seat 12 is fixedly mounted on the base 11, so that the top seat 12 accommodates components such as the drive mechanism 2 and the spindle assembly 3, and the base 11 is used to accommodate components such as batteries and motors. The shell 1 is also equipped with existing buttons 13 and control panels. The top seat 12 is composed of a top cover 121 and a bottom cover 122 that are split in half horizontally, wherein the bottom cover 122 is fixed on the base 11, and the top cover 121 and the bottom cover 122 have openings and cavities at the matching splicing positions, so that the cavity of the top seat 12 can be formed when the top cover 121 and the bottom cover 122 are enclosed with each other.

[0024] The driving mechanism 2 in the figure is an internal component of the existing tube expander. As shown in the figure, an eccentric wheel 21 and a push wheel 22 structure are designed. The eccentric wheel 21 has an eccentric outer contour on the outside. The push wheel 22 is a bearing structure fixed to the main shaft assembly 3 while keeping in contact with the outer contour of the eccentric wheel 21. At the same time, a longitudinally installed pin 23 is sleeved on the push wheel 22, and the fixed sleeve 32 has a pin seat 321 with a notch 3211 at the corresponding position, so that the pin 23 can be installed on the pin seat 321. Through the above design, when the motor rotates, the eccentric wheel 21 uses the change of the curved outer contour to realize the telescopic push of the bearing, thereby driving the main shaft assembly 3 to perform the corresponding telescopic action. In practical applications, the outer contour of the eccentric wheel 21 can be optimized and adjusted.

[0025] The spindle assembly 3 in the figure is composed of two separate parts, which are respectively designed as a replacement head 31 and a fixed sleeve 32. The replacement head 31 has a conical surface 311 structure facing the working head 4, which corresponds to the conical surface 311 inside the working head 4 as a whole. The replacement head 31 is also designed with an axial portion 312 and a threaded portion 313 facing the fixed sleeve 32, wherein the threaded portion 313 is on the outside, and the axial portion 312 is between the threaded portion 313 and the conical surface 311. The axial portion 312 adopts a round shaft structure to maintain axial positioning and fixation with the cavity inside the fixed sleeve 32, and the threaded portion 313 forms an external thread, which is threadedly matched with the internal thread inside the fixed sleeve 32 to realize the screw connection fixation between the replacement head 31 and the fixed sleeve 32. The fixing sleeve 32 is respectively designed with a cylindrical portion 322, an annular portion 323 and a pin seat 321, wherein the annular portion 323 is in the middle position and has a diameter greater than that of the cylindrical portion 322, wherein the cylindrical portion 322 has a cavity inside to facilitate the insertion of the axial portion 312 and the threaded portion 313, and the diameter of the cavity is greater than the diameter of the internal thread, so that the diameter of the matching axial portion 312 is greater than the diameter of the external thread, thereby ensuring the axial positioning of the replacement head 31 and the fixing sleeve 32. The annular portion 323 is used to fix the entire fixing sleeve 32, and the pin seat 321 is used to cooperate with the pin 23 on the pushing wheel 22.

[0026] The working head 4 in the figure is a component of an existing tube expander, which is assembled from multiple components and realizes the tube expansion action under the action of the main shaft assembly 3.

[0027] The specific embodiments described above are only used to explain the present technical solution and are not used to limit the present technical solution. In the description of the present technical solution, it should be noted that the terms such as "upper" and "inner" indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present technical solution 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 a limitation on the present technical solution.

[0028] At the same time, in the description of this technical solution, it should be noted that, unless otherwise clearly specified and limited, the terms "fixed" and "matched" 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 directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0029] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and that the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. A tube expander using a split spindle assembly, characterized in that: The invention comprises a housing (1), a driving mechanism (2), a spindle assembly (3), and a working head (4); the housing (1) is provided with a base (11) and a top seat (12); the top seat (12) is fixed on the base (11); a battery and a motor are arranged in the base (11); the driving mechanism (2) and the spindle assembly (3) are arranged in the top seat (12); the driving mechanism (2) comprises an eccentric wheel (21) and a push wheel (22); the eccentric wheel (21) cooperates with the motor in the base (11); the push wheel (22) cooperates with the eccentric outer contour of the eccentric wheel (21); the push wheel (22) is fixedly matched with the spindle assembly (3); the spindle assembly (3) is a split structure, comprising a housing (11) and a push wheel (22); A replacement head (31) and a fixing sleeve (32); one end of the fixing sleeve (32) is fixed to a pushing wheel (22); the fixing sleeve (32) has an internal thread and a cavity inside, and the diameter of the cavity is greater than the diameter of the internal thread; the end of the replacement head (31) facing the fixing sleeve (32) has a threaded portion (313) and an axial portion (312), wherein the axial portion (312) is a circular shaft structure and matches with the cavity of the fixing sleeve (32), and the threaded portion (313) has an external thread that is screwed with the internal thread of the fixing sleeve (32); the position where the replacement head (31) matches with the working head (4) is a conical surface (311), and the working head (4) has a corresponding conical surface (311) inside.

2. The tube expander using a split spindle assembly according to claim 1, characterized in that: The top seat (12) comprises a top cover (121) and a bottom cover (122); the bottom cover (122) is fixed on the base (11); the top cover (121) and the bottom cover (122) both have openings and cavities at matching positions; the top cover (121) and the bottom cover (122) are mutually enclosed to form the cavity of the top seat (12).

3. The tube expander using a split spindle assembly according to claim 2, characterized in that: The pushing wheel (22) is sleeved with a pin (23), and the fixing sleeve (32) has a pin seat (321) with a notch (3211) at a corresponding position, and both ends of the pin (23) are arranged on the pin seat (321).

4. The tube expander using a split spindle assembly according to claim 3, characterized in that: The fixing sleeve (32) further comprises a cylindrical portion (322) and an annular portion (323); the internal thread and the cavity are arranged in the cylindrical portion (322); the annular portion (323) is located between the cylindrical portion (322) and the pin seat (321); and the diameter of the annular portion (323) is greater than the diameter of the cylindrical portion (322).

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