Reducing induction coil

Abstract

The utility model discloses a variable-diameter induction coil, which comprises a variable-diameter induction coil body consisting of three parts, the variable-diameter induction coil body comprises a first small-diameter coil, a large-diameter coil and a second small-diameter coil, the first small-diameter coil is connected with the large-diameter coil through a first gradual change coil, and the second small-diameter coil is connected with the second gradual change coil through a second gradual change coil. The large-diameter ring is fixedly connected with the second small-diameter ring through a second gradual change ring, and the first small-diameter ring, the large-diameter ring, the second small-diameter ring, the first gradual change ring and the second gradual change ring are formed by integrally winding an integral copper pipe. According to different thicknesses of the cross section of the axle housing, the induction coil is designed into three sections of structures with different diameters and is formed by winding the whole copper pipe, water leakage is prevented, and the principle is that the diameter of a place with a thick cross section is larger, and the diameter of a place with a thin cross section is smaller, so that the requirement of heating with one heating power is met; and the heated part of the axle housing is uniformly expanded at constant temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic induction heating, in particular to a variable diameter induction coil. Background Art

[0002] Electromagnetic induction heating is used for heating and pressing of 13T lightweight axle housing and half-axle sleeve. The existing technology uses an induction coil with ∮97×240 wound 6 turns to heat the axle housing body, expands rapidly through induction heating, and then presses the half-axle sleeve into it. The half-axle sleeve is pressed into the axle housing for interference fit, and the induction heating must have enough expansion so that the sleeve can be pressed into the axle housing.

[0003] Due to the uneven wall thickness of the heated part of the 13T lightweight bridge housing (the thinnest is 13 mm and the thickest is 55 mm) and the irregular cross-section structure, an induction coil of one diameter is used for heating. In order to expand the irregular parts of the upper and lower leaf springs, the heating power can only be increased to (20-22 KW), but it will cause the thin wall of the bridge housing flange to overburn. The heating temperature exceeds 550°C, and the basic structure transforms to pearlite, which destroys the mechanical properties of the bridge housing material and causes quality problems such as fracture. Utility Model Content

[0004] The purpose of the utility model is to provide a variable diameter induction coil, which has a structure in which the induction coil is designed into three sections with different diameters according to the different thicknesses of the bridge shell cross section, and is wound out of an integral copper tube to prevent water leakage. The principle is that the diameter of the coil is larger where the cross section is thick, and the diameter of the coil is smaller where the cross section is thin, so as to meet the use of one heating power, so that the heated part of the bridge shell expands evenly and keeps a constant temperature, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A variable diameter induction coil comprises a variable diameter induction coil body consisting of three parts, wherein the variable diameter induction coil body comprises a first small diameter circle, a large diameter circle and a second small diameter circle, the first small diameter circle and the large diameter circle are connected by a first gradient circle, the large diameter circle and the second small diameter circle are fixedly connected by a second gradient circle, and the first small diameter circle, the large diameter circle and the second small diameter circle, the first gradient circle and the second gradient circle are formed by integrally winding an integral copper tube.

[0007] Preferably, one end of the first small-diameter circle is connected to a water inlet pipe, and one end of the second small-diameter circle is connected to a water outlet pipe.

[0008] Preferably, the end of the second small-diameter circle is connected to the water outlet pipe through a bend, and the water outlet pipe is located inside the first small-diameter circle, the large-diameter circle and the second small-diameter circle.

[0009] Preferably, the water inlet pipe, the water outlet pipe, the bending portion, the first small diameter circle, the large diameter circle, the second small diameter circle, the first gradient circle, and the second gradient circle are all formed by winding an integral copper tube.

[0010] Preferably, the ends of the water inlet pipe and the water outlet pipe are respectively connected with a first conductive member and a second conductive member.

[0011] Preferably, the ends of the water inlet pipe and the water outlet pipe are fixedly connected with a first threaded connector and a second threaded connector respectively.

[0012] Preferably, the water inlet pipe and the water outlet pipe are fixedly provided with a mounting plate between the first conductive member, the second conductive member and the first threaded connector and the second threaded connector, and a plurality of fixing bolts are threadedly connected to the mounting plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model designs the induction coil into a structure of three sections with different diameters according to the different thicknesses of the bridge shell cross section, and the induction coil is wound by an integral copper tube to prevent water leakage. The principle is that the diameter of the coil is larger at the place where the cross section is thick, and the diameter of the coil is smaller at the place where the cross section is thin, so as to meet the requirement of using one heating power so that the heated part of the bridge shell expands evenly and keeps a constant temperature. In addition, the connection between the first small-diameter coil and the second small-diameter coil and the large-diameter coil is connected through the first gradient coil and the second gradient coil, so as to realize the winding formation of the integral copper tube and improve the overall sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the right side structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the left structure of the utility model;

[0017] Figure 3 It is a top view of the end of the utility model;

[0018] Figure 4 It is an overall top view schematic diagram of the utility model.

[0019] In the figure: 1. first small diameter circle; 2. first gradient circle; 3. large diameter circle; 4. second gradient circle; 5. second small diameter circle; 6. bending part; 7. first conductive part; 8. second conductive part; 9. water inlet pipe; 10. water outlet pipe; 11. first threaded connector; 12. second threaded connector; 13. mounting plate; 14. fixing bolt. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 , the utility model provides a technical solution:

[0022] A variable diameter induction coil comprises a variable diameter induction coil body consisting of three parts, wherein the variable diameter induction coil body comprises a first small diameter ring 1, a large diameter ring 3 and a second small diameter ring 5, the first small diameter ring 1 and the large diameter ring 3 are connected via a first gradient ring 2, the large diameter ring 3 and the second small diameter ring 5 are fixedly connected via a second gradient ring 4, and the first small diameter ring 1, the large diameter ring 3 and the second small diameter ring 5, the first gradient ring 2 and the second gradient ring 4 are formed by integrally winding an integral copper tube.

[0023] In this embodiment, preferably, one end of the first small-diameter circle 1 is connected to a water inlet pipe 9, and one end of the second small-diameter circle 5 is connected to a water outlet pipe 10. The setting of the water inlet pipe 9 and the water outlet pipe 10 facilitates the circulation of cooling water, thereby facilitating cooling.

[0024] In this embodiment, preferably, the end of the second small diameter circle 5 is connected to the water outlet pipe 10 through a bending portion 6, and the water outlet pipe 10 is located inside the first small diameter circle 1, the large diameter circle 3 and the second small diameter circle 5. The setting of the bending portion 6 makes it convenient for the second small diameter circle 5 to bend the water outlet pipe 10 inside the first small diameter circle 1, the large diameter circle 3 and the second small diameter circle 5.

[0025] In the present embodiment, preferably, the water inlet pipe 9, the water outlet pipe 10 and the bending portion 6 are formed by integrally winding the first small diameter circle 1, the large diameter circle 3 and the second small diameter circle 5, the first gradient circle 2 and the second gradient circle 4 by an integral copper tube. The integrally molded and wound copper tube facilitates improving the overall sealing.

[0026] In this embodiment, preferably, the ends of the water inlet pipe 9 and the water outlet pipe 10 are respectively connected with the first conductive member 7 and the second conductive member 8. The setting of the first conductive member 7 and the second conductive member 8 facilitates power supply operation and realizes eddy current magnetic heating of the bridge housing.

[0027] In this embodiment, preferably, the ends of the water inlet pipe 9 and the water outlet pipe 10 are respectively fixedly connected with a first threaded connector 11 and a second threaded connector 12. The setting of the first threaded connector 11 and the second threaded connector 12 facilitates the connection of the water inlet pipe 9 and the water outlet pipe 10 to an external pipeline to realize the circulation of cooling water.

[0028] In the present embodiment, preferably, the water inlet pipe 9 and the water outlet pipe 10 are fixedly provided with a mounting plate 13 between the first conductive member 7, the second conductive member 8 and the first threaded connector 11 and the second threaded connector 12, and a plurality of fixing bolts 14 are threadedly connected to the mounting plate 13. The setting of the mounting plate 13 facilitates the installation and connection of the induction coil, and the stability of the connection is maintained by the fixing bolts 14.

[0029] Working principle: When in use, the external water supply pipe is sealed and connected with the first threaded connector 11 and the second threaded connector 12 at the ends of the water inlet pipe 9 and the water outlet pipe 10 to realize the circulation of cooling water, and the variable diameter magnetic induction coil is installed and connected through the mounting plate 13 and the fixing bolt 14 to maintain stability, and is electrically connected through the first conductive member 7 and the second conductive member 8 to realize power supply operation, and the first small diameter circle 1, the large diameter circle 3 and the second small diameter circle 5 are connected through the first gradient circle 2 and the second gradient circle 4. While improving the sealing connectivity, the size can also be gradually changed to facilitate heating of the bridge housing. When using the variable diameter induction coil for heating, the expansion amount of different parts of the bridge housing is between 0.3-0.5, and the temperature is constant at 300-350°C, which meets the process requirements of the pressed half-axle sleeve and solves the breakage problem.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable diameter induction coil, characterized in that: The invention relates to a variable diameter induction coil body composed of three parts, wherein the variable diameter induction coil body comprises a first small diameter coil (1), a large diameter coil (3) and a second small diameter coil (5); the first small diameter coil (1) and the large diameter coil (3) are connected via a first gradient coil (2); the large diameter coil (3) and the second small diameter coil (5) are fixedly connected via a second gradient coil (4); the first small diameter coil (1), the large diameter coil (3) and the second small diameter coil (5), the first gradient coil (2) and the second gradient coil (4) are formed by winding an integral copper tube.

2. The variable diameter induction coil according to claim 1, characterized in that: One end of the first small-diameter circle (1) is connected to a water inlet pipe (9), and one end of the second small-diameter circle (5) is connected to a water outlet pipe (10).

3. The variable diameter induction coil according to claim 2, characterized in that: The end of the second small-diameter circle (5) is connected to the water outlet pipe (10) via a bend (6); the water outlet pipe (10) is located inside the first small-diameter circle (1), the large-diameter circle (3) and the second small-diameter circle (5).

4. The variable diameter induction coil according to claim 3, characterized in that: The water inlet pipe (9), the water outlet pipe (10), the bending portion (6), the first small diameter ring (1), the large diameter ring (3), the second small diameter ring (5), the first gradient ring (2), and the second gradient ring (4) are all formed by winding an integral copper tube.

5. The variable diameter induction coil according to claim 2, characterized in that: The ends of the water inlet pipe (9) and the water outlet pipe (10) are respectively connected to a first conductive member (7) and a second conductive member (8).

6. The variable diameter induction coil according to claim 5, characterized in that: The ends of the water inlet pipe (9) and the water outlet pipe (10) are respectively fixedly connected with a first threaded connector (11) and a second threaded connector (12).

7. The variable diameter induction coil according to claim 6, characterized in that: The water inlet pipe (9) and the water outlet pipe (10) are fixedly provided with a mounting plate (13) between the first conductive member (7), the second conductive member (8) and the first threaded connector (11) and the second threaded connector (12), and a plurality of fixing bolts (14) are threadedly connected to the mounting plate (13).

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