Flange structure

Abstract

The invention provides a flange structure which comprises a flange which comprises a flange plate and a boss arranged at one end of the flange plate, and a first mounting hole is formed in the outer wall of the boss; at least part of the fixing part extends into the boss; a second mounting hole is formed in the outer wall of the fixing part and corresponds to the first mounting hole; and the fixing pieces are arranged in the first mounting hole and the second mounting hole so as to connect the fixing part and the flange. After the fractured opening part of the flange is trimmed, the fixed part is fixed at the trimmed opening part, and the fixed part can be matched with the expansion clamping shaft, so that by arranging the fixed part at the fractured opening part of the flange, the flange can realize the function of driving the rotor to rotate when the rotor is turned again, a new original flange does not need to be replaced, and the cost of replacing the flange is reduced; and the shutdown risk of the machine tool is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lathes, and in particular to a flange structure. Background Art

[0002] The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque. As a power source for various devices, it is widely used in people's lives and industrial production. The motor generally includes a stator and a rotor. The rotor is a product made by stacking multiple layers of steel sheets and casting them together by die casting. After the rotor is die-cast, there are many burrs on its outer wall, so it is necessary to turn the outer wall of the rotor. At present, the turning process is completed on a lathe. A lathe is a machine tool that uses a turning tool to turn a rotating workpiece.

[0003] The main shaft of the lathe is connected with a flange, and the mouth of the flange is matched with an expansion clamp shaft. Figure 1 The schematic diagram of the flange in the prior art is shown. When the rotor to be turned is turned, the rotor to be turned is first sleeved on the outside of the expansion and clamping shaft, and then the conical expansion sleeve of the expansion and clamping shaft is deformed until the expansion sleeve is pressed against the inner wall of the rotor, so that the rotor and the expansion and clamping shaft are closely matched. When the main shaft of the lathe is turned, the flange and the expansion and clamping shaft are driven to rotate, and then the rotor is rotated, and the turning tool turns the rotating rotor to complete the cutting of the outer wall of the rotor.

[0004] When turning the rotor, the runout is required to be less than 0.05mm at high speed to ensure the turning accuracy of the rotor. Therefore, the assembly of the rotor, flange and expansion shaft during turning requires high precision. However, at present, when operators assemble or disassemble the rotor, even a small amount of force can easily cause the flange mouth ( Figure 1 At present, the flanges on the production site are only imported from the original factory, which are expensive and have a very fragile structure. Therefore, the replacement cost of the flange is high, the service life is short, and the procurement cycle is long, resulting in high production cost pressure and a high risk of machine tool shutdown due to lack of spare parts. Summary of the invention

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a flange structure to reduce the replacement cost of the flange and reduce the risk of machine tool shutdown due to lack of spare parts for replacement.

[0006] An embodiment of the present invention provides a flange structure, including:

[0007] The flange comprises a flange plate and a boss arranged at one end of the flange plate, wherein the outer wall of the boss is provided with a first mounting hole;

[0008] A fixing portion at least partially extends into the interior of the boss; a second mounting hole is provided on the outer wall of the fixing portion, corresponding to the first mounting hole;

[0009] A fixing member is arranged in the first mounting hole and the second mounting hole to connect the fixing portion and the flange.

[0010] In some embodiments, the fixing portion includes a first fixing sub-portion and a second fixing sub-portion arranged in sequence along the axial direction, and an end portion of the first fixing sub-portion away from the second fixing sub-portion extends into the interior of the boss.

[0011] In some embodiments, a stopper portion extending outward away from the outer wall is provided on the outer wall of the first stator portion, and one end of the stopper portion abuts against an end surface of the boss on a side away from the flange.

[0012] In some embodiments, the first mounting hole is a through hole, and the second mounting hole is a blind hole.

[0013] In some embodiments, a connection corner between the first stator portion and the second stator portion is a rounded corner.

[0014] In some embodiments, the radius of the rounded corner is 1.5 mm to 3 mm.

[0015] In some embodiments, the length of the portion of the structure where the first stator portion extends into the boss is 8 mm to 12 mm.

[0016] In some embodiments, the blind hole has a depth of 3 mm to 5 mm.

[0017] In some embodiments, one end of the fixing member facing away from the second mounting hole is welded to the boss.

[0018] In some embodiments, a through hole is provided inside the second stator portion, and the hole diameter of the second stator portion is 10.02 mm to 10.03 mm.

[0019] The flange structure provided by the present invention has the following advantages:

[0020] After the broken mouth of the flange is repaired, the present invention fixes a fixing part on the repaired mouth, and the fixing part can cooperate with the expansion clamp shaft. Therefore, by setting the fixing part on the broken flange mouth, the flange can realize the function of driving the rotor to rotate when turning the rotor again, without replacing the new original flange, thereby reducing the cost of replacing the flange and reducing the risk of machine tool shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0022] Figure 1It is a structural diagram of the flange at the production site;

[0023] Figure 2 This is a schematic diagram of the structural fracture of the head part of the flange at the production site;

[0024] Figure 3 is a schematic structural diagram of a fixing portion provided by an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of a flange structure provided by an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100' Flange 120 boss in the prior art

[0028] 110' The first mounting hole of the flange 1211 in the prior art

[0029] 120' The fixing part of the boss 200 in the prior art

[0030] 121' The second mounting hole of the first boss 211 in the prior art

[0031] 122' The first fixed sub-portion of the second boss 210 in the prior art

[0032] 123' The stopper of the third boss 212 in the prior art

[0033] 100 Flange 220 in this embodiment Second stator portion

[0034] 110 Flange 300 Fixing parts DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the same reference numerals represent the same or similar structures, and thus their repeated description will be omitted. "or" and "or" in the specification may both mean "and" or "or".

[0036] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0039] like Figure 1 As shown, in the prior art, the flange 100' connected to the main shaft of the lathe at the production site includes a flange plate 110' and a boss 120', and the boss 120' includes a first boss 121', a second boss 122' and a third boss 123' arranged in a stepped manner. An expansion shaft is fixed to the outside of the third boss 123', and the rotor to be turned is sleeved on the outside of the expansion shaft. When the expansion sleeve of the expansion shaft undergoes a taper deformation, it presses against the inner wall of the rotor, so that the rotor and the expansion shaft fit tightly. Since the structural strength of the part where the boss 120' fits with the expansion shaft is low and the assembly precision requirements are high, when the on-site operation is improper, it is very easy for the third boss 123' and the second boss 122' to break. The cost of replacing a new original flange is high and the procurement cycle is long. At present, there is a risk of stopping the production of the lathe if the flange 100' is damaged.

[0040] In order to solve the problems in the prior art, an embodiment of the present invention provides a flange structure, including: a flange, including a flange plate and a boss arranged at one end of the flange plate, and a first mounting hole is arranged on the outer wall of the boss; a fixing portion, at least partially extending into the interior of the boss; a second mounting hole is arranged on the outer wall of the fixing portion, corresponding to the first mounting hole; a fixing member, arranged in the first mounting hole and the second mounting hole, to connect the fixing portion and the flange. In this technical solution, after the broken mouth of the flange is trimmed, a fixing portion is fixed to the trimmed mouth, and the fixing portion can cooperate with the expansion clamp shaft. Therefore, by setting a fixing portion at the broken flange mouth, the flange can realize the function of driving the rotor to rotate when turning the rotor again, without replacing the new original flange, thereby reducing the cost of replacing the flange and reducing the risk of machine tool downtime.

[0041] The flange structure of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments shown are not intended to limit the scope of protection of the present invention. Figure 2 A schematic diagram showing a structural fracture of the head portion of a flange at a production site; Figure 3 A schematic diagram of the structure of a fixing part provided by an embodiment of the present invention is shown; Figure 4 A schematic diagram of a flange structure provided by an embodiment of the present invention is shown.

[0042] like Figures 2 to 4 As shown, the flange structure includes a flange 100 , a fixing portion 200 and a fixing member 300 .

[0043] like Figure 2 As shown, the flange 100 includes a flange plate 110 and a boss 120 disposed at one end of the flange plate 110, and a first mounting hole 1211 is disposed on the outer wall of the boss 120. It should be noted that, Figure 2 The flange 100 shown is Figure 1 After the middle boss 120' is partially broken, the broken part is cut off. The boss 120 of the flange 100 only includes one boss structure. In this embodiment, one boss structure is only reserved for the corresponding Figure 1 In some other embodiments, the boss 120 may also include two boss structures (for example, Figure 1 The second boss 122' structure on the upper side is not specifically limited here.

[0044] like Figure 2 and Figure 4 As shown, part of the fixing portion 200 extends into the interior of the boss 120 , and a second mounting hole 211 is provided on the outer wall of the fixing portion 200 , and the first mounting hole 1211 corresponds to the second mounting hole 211 .

[0045] like Figure 4As shown, the fixing member 300 is disposed in the first mounting hole 1211 and the second mounting hole 211 to connect the fixing portion 200 and the flange 100 .

[0046] The existing flange 100 is obtained by trimming the broken mouth of the original flange, and then a fixing part 200 is fixed to the mouth of the existing flange 100. The fixing part 200 can cooperate with the expansion clamp shaft. Therefore, the flange structure formed by connecting the flange 100 and the fixing part 200 can re-realize the function of driving the rotor to rotate when turning the rotor, thereby reducing the replacement cost when the flange is damaged and reducing the risk of machine tool downtime.

[0047] Furthermore, if Figure 3 As shown, the fixing portion 200 includes a first fixing sub-portion 210 and a second fixing sub-portion 220 arranged in sequence along the axial direction, and an end portion of the first fixing sub-portion 210 away from the second fixing sub-portion 220 extends into the interior of the boss 120 .

[0048] Furthermore, if Figure 3 and Figure 4 As shown, a stopper 212 extending outward away from the outer wall is provided on the outer wall of the first fixing sub-part 210, and one end of the stopper 212 abuts against the end surface of the boss 120 away from the flange 110. The setting of the stopper 212 can make the fixing part 200 have a good limit position, which can improve the efficiency of assembly.

[0049] Furthermore, if Figure 2 and Figure 3 As shown, in this embodiment, the first mounting hole 1211 is a through hole, and the second mounting hole 211 is a blind hole. One end of the fixing member 300 passes through the through hole and abuts against the bottom of the blind hole, thereby firmly fixing the fixing part 200 and the flange 100 and improving the connection strength between the two.

[0050] Furthermore, if Figure 3 As shown, the external connection angles of the first fixed sub-section 210 and the second fixed sub-section 220 are rounded. The rounded connection angle design can effectively reduce stress concentration, increase the connection strength of the parts, improve the service life and efficiency of the parts, and reduce the probability of the fixing part 200 breaking. In some embodiments, the radius of the fillet is 1.5mm to 3mm. Exemplarily, the radius of the fillet is 1.7mm, 2mm, 2.3mm, 2.6mm and 2.9mm.

[0051] Furthermore, if Figure 3As shown, in the present embodiment, when the stopper 212 is realized, a step is machined on the side of the first stator portion 210 close to the boss 120. The outer diameter of the machined portion of the first stator portion 210 is reduced and can extend into the interior of the boss 120. The outer diameter of the unmachined portion is larger and can serve as the stopper 212 to abut against the end face of the boss 120 facing away from the flange 110.

[0052] Furthermore, the length of the portion of the first stator portion 210 extending into the boss 120 is 8 mm to 12 mm. For example, the extending length may be 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, or 11.5 mm.

[0053] Furthermore, the blind hole has a depth of 3 mm to 5 mm. Exemplarily, the blind hole has a depth of 3.4 mm, 3.8 mm, 4.2 mm, 4.4 mm, and 4.8 mm. By setting a reasonable blind hole depth, the flange 100 and the fixing part 200 can be fixed firmly, the connection strength between the two can be improved, and the service life of the flange structure can be increased.

[0054] Furthermore, the fixing member 300 may be, for example, a bolt, a stud, a screw, etc. Figure 4 As described above, the fixing member 300 in this embodiment is a cylindrical pin, which is inserted into the first mounting hole 1211 and the second mounting hole 211 during assembly and is lower than the top of the first mounting hole 1211. In a preferred embodiment, a welding process can be further used to weld the end of the fixing member 300 away from the second mounting hole 211 to the boss 120 to prevent the flange 100 and the fixing part 200 from falling off during high-speed rotation, thereby improving the connection stability between the two.

[0055] Furthermore, a through hole is provided inside the second fixed sub-section 220, and the aperture of the through hole is 10.02 mm to 10.03 mm. The expansion clamp shaft is matched with the second fixed sub-section 220 through the through hole of the second fixed sub-section 220, and the expansion clamp shaft needs to have good coaxiality with the second fixed sub-section 220 to improve the connection stability between the two and avoid the failure of the fixed section 200 due to the poor coaxiality between the expansion clamp shaft and the second fixed sub-section 220.

[0056] To further confirm the beneficial effects of the flange structure provided by the present invention, the inventor recorded the runout stability of the machine tool using the flange structure in the embodiment of the present invention, and after tracking multiple shifts, found that the runout stability of the machine tool using the flange structure provided by the embodiment of the present invention meets the on-site requirements. Therefore, the flange structure provided by the embodiment of the present invention can reduce the cost of replacing the flange and reduce the risk of machine tool shutdown caused by flange damage.

[0057] In summary, the flange structure provided by the present invention has the following advantages:

[0058] After the broken mouth of the flange is repaired, the present invention fixes a fixing part on the repaired mouth, and the fixing part can cooperate with the expansion clamp shaft. Therefore, by setting the fixing part on the broken flange mouth, the flange can realize the function of driving the rotor to rotate when turning the rotor again, without replacing the new original flange, thereby reducing the cost of replacing the flange and reducing the risk of machine tool shutdown.

[0059] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A flange structure, characterized in that: include: The flange comprises a flange plate and a boss arranged at one end of the flange plate, wherein the outer wall of the boss is provided with a first mounting hole; A fixing portion at least partially extends into the interior of the boss; a second mounting hole is provided on the outer wall of the fixing portion, corresponding to the first mounting hole; A fixing member is arranged in the first mounting hole and the second mounting hole to connect the fixing portion and the flange.

2. The flange structure according to claim 1, characterized in that: The fixing portion comprises a first fixing sub-portion and a second fixing sub-portion which are sequentially arranged along the axial direction, and an end portion of the first fixing sub-portion which is away from the second fixing sub-portion extends into the interior of the boss.

3. The flange structure according to claim 2, characterized in that: A stopper portion extending outward away from the outer wall is provided on the outer wall of the first stator portion, and one end of the stopper portion abuts against an end surface of the boss on a side away from the flange.

4. The flange structure according to claim 3, characterized in that: The first mounting hole is a through hole, and the second mounting hole is a blind hole.

5. The flange structure according to claim 2, characterized in that: A connection angle between the first stator portion and the second stator portion is a rounded angle.

6. The flange structure according to claim 5, characterized in that: The radius of the fillet is 1.5 mm to 3 mm.

7. The flange structure according to claim 4, characterized in that: The length of the portion of the first stator portion extending into the boss is 8 mm to 12 mm.

8. The flange structure according to claim 7, characterized in that: The blind hole has a hole depth of 3 mm to 5 mm.

9. The flange structure according to claim 1, characterized in that: One end of the fixing member away from the second mounting hole is welded to the boss.

10. The flange structure according to claim 2, characterized in that: A through hole is provided inside the second stator portion, and the diameter of the through hole is 10.02 mm to 10.03 mm.

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