Core expanding device

Abstract

A core expansion device is characterized by comprising a mandrel, a taper sleeve, an expansion sleeve, a disassembly nut, a pressure pad, a slotted set screw with a flat end, a positioning block, a cylindrical pin, an elastic sleeve, an elastic sleeve, an elastic sleeve, an elastic sleeve and a disassembly nut, wherein the taper sleeve, the elastic sleeve, the disassembly nut, the pressure pad, the slotted set screw with the flat end, the positioning block and the cylindrical pin are arranged on the mandrel; a check ring is arranged on the mandrel; the mandrel is sleeved with the taper sleeve, the taper sleeve is connected with the mandrel through the inner hexagonal conical end set screw, the check ring is arranged at the rear end of the taper sleeve and on the mandrel through the inner hexagonal conical end set screw and used for blocking the taper sleeve, the conical outer surface of the taper sleeve is finely ground, and when the expansion core needs to be fastened integrally, the nuts are loosened in sequence, and the expansion core is tightened. And the hexagon-headed bolts are sequentially tightened, the hexagon-headed bolts are sequentially loosened when disassembly is needed, and then the nuts are sequentially tightened, so that core expansion is realized, and the situations that the circular tubular part is not firmly clamped during machining and is loosened are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of machining and manufacturing, in particular to a core expanding device. Background Art

[0002] When mechanical products are produced, some mechanical products have a large demand for part processing and high processing accuracy requirements. Especially for some precision mechanical products, different processing methods have a certain impact on the processing speed and processing accuracy of the products. Some existing circular tubular parts are not firmly clamped during processing and will become loose. To solve the above problems, a core expanding device is proposed. Summary of the Utility Model

[0003] According to the above existing technical problems, the utility model provides a core expanding device, which is characterized by including a mandrel, a tapered sleeve, an expanding sleeve, a disassembly nut, a pressing pad, a loading sleeve, a positioning block, a cylindrical pin, a retaining ring, an internal hexagonal socket set screw with cone point, a stud, a nut, a slotted flat end set screw, and a hexagon head bolt. A tapered sleeve is arranged on the mandrel, an expanding sleeve is arranged on the mandrel, a disassembly nut is arranged on the mandrel, a pressing pad is arranged on the disassembly nut, a slotted flat end set screw is arranged on the disassembly nut, a positioning block is arranged on the disassembly nut, a cylindrical pin is arranged on the positioning block, a retaining ring is arranged on the mandrel, an internal hexagonal socket set screw with cone point is arranged in the retaining ring, a loading sleeve is arranged on the mandrel, a stud is arranged on the loading sleeve, a nut is arranged on the stud, and a hexagon head bolt is arranged on the loading sleeve;

[0004] Further, a retaining ring is arranged at the rear end of the tapered sleeve. The retaining ring is connected to the mandrel through an internal hexagonal socket set screw with cone point. The outer surface of the tapered sleeve is conical. An internal hexagonal socket set screw with cone point is inserted into the outer surface of the tapered sleeve and connected to the mandrel. The expanding sleeve has a tapered groove, which corresponds to the conical outer surface of the tapered sleeve. There is a convex block at the top of the expanding sleeve. The expanding sleeve is connected to the positioning block and the disassembly nut through the convex block;

[0005] Further, the loading sleeve is connected to the mandrel through an internal hexagonal socket set screw with cone point. A stud is arranged on the loading sleeve. One end of the stud extends into the disassembly nut and contacts the pressing pad, and the other end is connected to the nut. A hexagon head bolt is arranged on the loading sleeve. The loading sleeve is connected to the disassembly nut through the stud and the hexagon head bolt;

[0006] Further, there are three internal hexagonal socket set screws with cone point on the retaining ring, and they are evenly distributed on the retaining ring. There are three internal hexagonal socket set screws with cone point on the tapered sleeve, and they are evenly distributed on the tapered sleeve. There are three studs on the loading sleeve. There are three hexagon head bolts on the loading sleeve, which are alternately arranged with the three studs and evenly distributed on the loading sleeve.

[0007] Advantages of the present utility model:

[0008] In the present utility model, a tapered sleeve is sleeved on a mandrel, and the tapered sleeve is connected to the mandrel by an internal hexagon socket set screw. A retaining ring is arranged on the mandrel by an internal hexagon socket set screw at the rear end of the tapered sleeve to block the tapered sleeve. The tapered outer surface of the tapered sleeve is finely polished. A expanding sleeve is sleeved outside the tapered sleeve, and the expanding sleeve is connected to a dismounting nut through a convex block and a positioning block. A loading sleeve is connected to the mandrel by an internal hexagon socket set screw. A plurality of stud bolts and hexagon head bolts are inserted from the loading sleeve and extend into the dismounting nut. When the whole needs to tighten the expanding core, the nuts are loosened in sequence, and then the hexagon head bolts are tightened in sequence. When dismounting is required, the hexagon head bolts are loosened in sequence, and then the nuts are tightened in sequence to realize the expanding core, avoiding the situation that the circular tubular parts are not firmly clamped during processing and loosening may occur. Description of the drawings

[0009] Figure 1 is the overall structural schematic diagram of an expanding core device of the present utility model;

[0010] As shown in the figure: 1 mandrel, 2 tapered sleeve, 3 expanding sleeve, 4 dismounting nut, 5 pressure pad, 6 loading sleeve, 7 positioning block, 8 cylindrical pin, 9 retaining ring, 10 internal hexagon socket set screw, 11 stud bolt, 12 nut, 13 slotted end set screw, 14 hexagon head bolt. Specific embodiments

[0011] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0012] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0013] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0014] Embodiment 1

[0015] The present utility model provides a core expanding device, which is characterized by comprising a mandrel 1, a taper sleeve 2, an expanding sleeve 3, a disassembly nut 4, a pressure pad 5, a loading sleeve 6, a positioning block 7, a cylindrical pin 8, a retaining ring 9, an internal hexagon socket set screw 10, a stud 11, a nut 12, a slotted fillister head set screw 13, and a hexagon head bolt 14. A taper sleeve 2 is arranged on the mandrel 1, an expanding sleeve 3 is arranged on the mandrel 1, a disassembly nut 4 is arranged on the mandrel 1, a pressure pad 5 is arranged on the disassembly nut 4, a slotted fillister head set screw 13 is arranged on the disassembly nut 12, a positioning block 7 is arranged on the disassembly nut 4, a cylindrical pin 8 is arranged on the positioning block 7, a retaining ring 9 is arranged on the mandrel 1, an internal hexagon socket set screw 10 is arranged inside the retaining ring 9, a loading sleeve 6 is arranged on the mandrel 1, a stud 11 is arranged on the loading sleeve 6, a nut 12 is arranged on the stud 11, and a hexagon head bolt 14 is arranged on the loading sleeve 6;

[0016] Furthermore, a retaining ring 9 is arranged at the rear end of the taper sleeve 2. The retaining ring 9 is connected to the mandrel 1 through an internal hexagon socket set screw 10. The outer surface of the taper sleeve 2 is conical, and an internal hexagon socket set screw 10 is inserted into the outer surface of the taper sleeve 2 and connected to the mandrel 1. The expanding sleeve 3 has a conical slot inside, which corresponds to the conical outer surface of the taper sleeve 2. There is a convex block at the top of the expanding sleeve 3, and the expanding sleeve 3 is connected to the positioning block 7 and the disassembly nut 4 through the convex block;

[0017] Furthermore, the loading sleeve 6 is connected to the mandrel 1 through an internal hexagon socket set screw 10. A stud 11 is arranged on the loading sleeve 6. One end of the stud 11 extends into the disassembly nut 4 and contacts the pressure pad 5, and the other end is connected to the nut 12. A hexagon head bolt 14 is arranged on the loading sleeve 6. The loading sleeve 6 is connected to the disassembly nut 4 through the stud 11 and the hexagon head bolt 14;

[0018] Further, there are three socket head cap screws 10 with cone ends on the retaining ring 9, which are evenly distributed on the retaining ring 9. There are three socket head cap screws 10 with cone ends on the tapered sleeve 2, which are evenly distributed on the tapered sleeve 2. There are three stud bolts 11 on the loading sleeve 6, and there are three hexagon head bolts 14 on the loading sleeve 6, which are alternately arranged with the three stud bolts 11 and are evenly distributed on the loading sleeve 6.

[0019] Embodiment 2

[0020] During use, the tapered sleeve 2 is sleeved on the mandrel 1, and the tapered sleeve 2 is connected to the mandrel 1 through the socket head cap screw 10 with cone end. A retaining ring 9 is arranged on the mandrel 1 through the socket head cap screw 10 with cone end at the rear end of the tapered sleeve 2 to block the tapered sleeve 2. The tapered outer surface of the tapered sleeve 2 is finely polished. The expansion sleeve 3 is sleeved outside the tapered sleeve 2, and the expansion sleeve 3 and the disassembly nut 4 are connected by the connection of the convex block and the positioning block 7. The loading sleeve 6 is connected to the mandrel 1 through the socket head cap screw 10 with cone end. A number of stud bolts 11 and hexagon head bolts 14 are inserted from the loading sleeve 6 and extend into the disassembly nut 4. When the whole needs to fasten the expanding core, the nuts 12 are loosened in sequence, and then the hexagon head bolts 14 are tightened in sequence. When disassembly is required, the hexagon head bolts 14 are loosened in sequence, and then the nuts 12 are tightened in sequence to realize the expanding core.

[0021] The above shows and describes the basic principles, main features and advantages of the present invention. Each component mentioned in the present invention is a common technology in the existing field. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A core expansion device, characterized in that: It includes a core shaft, a tapered sleeve is arranged on the core shaft, an expansion sleeve is arranged on the core shaft, a disassembly nut is arranged on the core shaft, a pressure pad is arranged on the disassembly nut, a slotted flat-end set screw is arranged on the disassembly nut, a positioning block is arranged on the disassembly nut, a cylindrical pin is arranged on the positioning block, a retaining ring is arranged on the core shaft, a hexagonal cone-end set screw is arranged in the retaining ring, a loading sleeve is arranged on the core shaft, a stud is arranged on the loading sleeve, a nut is arranged on the stud, and a hexagonal head bolt is arranged on the loading sleeve.

2. A core expansion device according to claim 1, characterized in that: A retaining ring is arranged at the rear end of the tapered sleeve, and the retaining ring is connected to the core shaft through a hexagonal cone-end set screw. The outer surface of the tapered sleeve is tapered, and a hexagonal cone-end set screw is inserted into the outer surface of the tapered sleeve and connected to the core shaft. A conical groove is arranged inside the expansion sleeve and corresponds to the conical outer surface of the tapered sleeve. A protrusion is arranged at the top end of the expansion sleeve, and the expansion sleeve is connected to the positioning block and the disassembly nut through the protrusion.

3. A core expansion device according to claim 2, characterized in that: The loading sleeve is connected to the core shaft through a hexagonal cone-end set screw, one end of the stud extends into the disassembly nut and contacts the pressure pad, and the other end is connected to the nut. The loading sleeve is connected to the disassembly nut through the stud and the hexagonal bolt.

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