Stacked mandrel with tensioning structure

Abstract

The utility model relates to the technical field of motor equipment, in particular to a stacking mandrel with a tensioning structure, which comprises a lower base and a stacking component, a conical column is fixedly arranged at one end of the lower base, a first through hole is formed in the middle of the lower base, and the stacking component is positioned in the first through hole; the outer side of the stacking assembly is sleeved with a lower base plate and a plurality of punching sheets, the lower base plate is located on the right side of the lower base, the punching sheets are located on the right side of the lower base plate, and an upper pressing plate is arranged on the right sides of the punching sheets and arranged on the stacking assembly in a sleeving mode. The stacking assembly comprises a mandrel, an expansion sleeve, a first spring and a second spring, the expansion sleeve is arranged on the mandrel in a sleeving mode, a driving block is fixedly arranged in the middle of the lower end of the expansion sleeve, a conical ring is arranged in the middle of the mandrel in a sleeving mode, and the driving block makes contact with the mandrel. According to the utility model, the punching sheets can be rapidly installed, so that the operation of stacking the punching sheets is easier, the deformation of the punching sheets is prevented, the installed punching sheets are more orderly, and the punching sheets are fixed and prevented from slipping off.

Description

Technical Field

[0001] The utility model relates to the technical field of motor equipment, and particularly relates to a stacked mandrel with a tensioning structure. Background Art

[0002] A stacked mandrel refers to a tool used for positioning and supporting punching sheets or silicon steel sheets during the stacking process of a motor stator and rotor core. Stacked mandrels have different applications and design requirements in different types of stacking processes.

[0003] The stacked mandrel plays a crucial role in the stacking process of the motor stator and rotor core, ensuring the dimensional accuracy and stacking quality of the core. Different stacking processes have different requirements for the design and use of the mandrel, but their core purpose is to ensure the dimensional accuracy and stacking quality of the core.

[0004] Currently, the following areas in the existing technology still need to be improved: In the existing technology, during the installation process of the stacked mandrel, it is required that the punching sheets be neat and not uneven. Therefore, when designing the mandrel, the mandrel and the punching sheets need to have a small interference fit. However, during the stacking of the punching sheets, the stacking process is relatively difficult and prone to causing deformation of the punching sheets. At the same time, after the stacking is completed, it is very time-consuming and laborious to remove the core assembly, resulting in low work efficiency. Summary of the Utility Model

[0005] To solve the above problems existing in the existing technology, the utility model provides a stacked mandrel with a tensioning structure, which can quickly install punching sheets, make the operation of stacking punching sheets easier, prevent deformation of the punching sheets, make the installed punching sheets neater, and fix the punching sheets to prevent slipping.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A stacked mandrel with a tensioning structure includes a lower base and a stacking assembly. One end of the lower base is fixedly provided with a tapered column, and a first through hole is opened at the middle position of the lower base. The stacking assembly is located in the first through hole;

[0008] A lower backing plate and a plurality of punching sheets are sleeved outside the stacking assembly. The lower backing plate is located on the right side of the lower base, and the plurality of punching sheets are located on the right side of the lower backing plate. An upper pressing plate is arranged on the right side of the plurality of punching sheets, and the upper pressing plate is sleeved on the stacking assembly;

[0009] The stacking assembly includes a mandrel, a sleeve, a first spring, and a second spring. The sleeve is sleeved on the mandrel. A driving block is fixedly arranged at the middle position of the lower end of the sleeve. A tapered ring is sleeved at the middle position of the mandrel. The driving block is in contact with the mandrel. Both ends of the lower side of the sleeve are inclined planes;

[0010] The left inclined surface at the lower side of the expansion sleeve contacts the conical column at one end of the lower base, and the right inclined surface at the lower side of the expansion sleeve contacts the conical ring at the middle position of the mandrel. The first spring and the second spring are both sleeved on the mandrel. The first spring and the second spring are respectively located on the left and right sides of the driving block. The first spring is located on the right side of the conical column at one end of the lower base, and the second spring is located on the left side of the conical ring at the middle position of the mandrel.

[0011] Further, the left end of the mandrel is located in the first through hole, and a screw is threadedly provided at the central position of the left end of the mandrel. The screw fixedly connects the lower base and the mandrel.

[0012] Further, the right end of the mandrel is provided with an external thread, and a locking nut is rotatably provided on the mandrel. The locking nut is located on the right side of the upper pressing plate.

[0013] Further, a gasket is sleeved on the screw, and the gasket is located between the screw and the lower base.

[0014] Further, the mandrel and the driving block are integrally formed, the mandrel and the conical ring are integrally formed, and the lower base and the conical column are integrally formed.

[0015] Further, two first square grooves are formed in the lower backing plate, and a first key plate and a second key plate are respectively arranged in the two first square grooves.

[0016] Further, two second square grooves are formed in the upper pressing plate. The ends of the first key plate and the second key plate away from the lower backing plate are respectively located in the two second square grooves, and the first key plate and the second key plate penetrate through a plurality of punching sheets.

[0017] The beneficial effects of the present utility model are as follows:

[0018] (1) By providing the stacking assembly, the technical effect that can be achieved is that when the screw is not tightened, the mandrel is in the original state, the expansion sleeve is not expanded, and a plurality of punching sheets are placed on the expansion sleeve. There is a clearance fit between the expansion sleeve and the punching sheets. Tighten the screw to expand the left end of the mandrel, expand the expansion sleeve, and position the inner hole of the punching sheet. After completing the assembly of the punching sheet, loosen the locking nut, remove the upper pressing plate, and then loosen the screw. Under the elastic force of the first spring and the second spring, push the mandrel and the lower base away, and the outer diameter of the expansion sleeve shrinks. Take out the punching sheet assembly. The stacking assembly can quickly install the punching sheet. Through the expansion and contraction of the expansion sleeve, the operation of stacking punching sheets is made easier, preventing the punching sheet from being deformed due to forced installation. After the expansion sleeve is expanded, the inner control of the punching sheet is fixed to prevent slipping.

[0019] (2) By setting the first key plate and the second key plate, the technical effects that can be achieved are as follows: one end of the first key plate and the second key plate is respectively located in two first square grooves, and the ends of the first key plate and the second key plate far from the lower backing plate are respectively located in two second square grooves. The first key plate and the second key plate penetrate through multiple punching sheets. After placing the first key plate and the second key plate into the punching sheets and aligning the multiple punching sheets, the first key plate and the second key plate are located in the multiple punching sheets, making the installed punching sheets neater, avoiding the unevenness of the punching sheets after installation, which affects subsequent operations, and also being able to position the punching sheets and prevent the punching sheets from rotating.

[0020] (3) By setting the lower base, the lower backing plate, the upper pressing plate and the locking nut, the technical effects that can be achieved are as follows: a conical column is fixedly arranged at one end of the lower base, a first through hole is opened at the middle position of the lower base, the stacking assembly is located in the first through hole, the outer side of the stacking assembly is sleeved with the lower backing plate and multiple punching sheets, the lower backing plate is located on the right side of the lower base, multiple punching sheets are located on the right side of the lower backing plate, an upper pressing plate is arranged on the right side of the multiple punching sheets. The upper pressing plate is sleeved on the mandrel, the locking nut is rotationally connected to the mandrel, the locking nut is rotated to press the upper pressing plate, and then the multiple punching sheets are bonded together by welding or heating glue. The lower backing plate and the upper pressing plate are used for positioning the punching sheets in the left-right direction, and the locking nut is used for pressing the upper pressing plate so that the multiple punching sheets are pressed together, which is helpful for the subsequent bonding of the punching sheets. Description of the Drawings

[0021] For the convenience of those skilled in the art to understand, the following further describes the present utility model with reference to the accompanying drawings.

[0022] Figure 1 Is the three-dimensional view of the present utility model;

[0023] Figure 2 Is the exploded view of the present utility model;

[0024] Figure 3 Is the front sectional view of the present utility model;

[0025] Figure 4 Is the left view of the upper pressing plate in the present utility model;

[0026] Figure 5 Is the left view of the punching sheet in the present utility model;

[0027] Figure 6 Is the left half sectional view of the expansion sleeve in the present utility model;

[0028] Figure 7 Is the front view of the mandrel in the present utility model;

[0029] Main Component Symbol Explanation:

[0030] In the figure: 1. Screw; 2. Gasket; 3. Lower base; 4. First spring; 5. Lower backing plate; 6. Expansion sleeve; 7. First key plate; 8. Second key plate; 9. Stamping; 10. Second spring; 11. Core shaft; 12. Upper pressure plate; 13. Locking nut. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] Refer to Figures 1 to 7 , a stacked core shaft with a tensioning structure disclosed by the present utility model, including a lower base 3 and a stacked component. A tapered column is fixedly provided at one end of the lower base 3, and a first through hole is opened at the middle position of the lower base 3. The stacked component is located in the first through hole.

[0035] A lower backing plate 5 and a plurality of stampings 9 are sleeved on the outer side of the stacked component. The lower backing plate 5 is located on the right side of the lower base 3, and a plurality of stampings 9 are located on the right side of the lower backing plate 5. An upper pressure plate 12 is provided on the right side of the plurality of stampings 9, and the upper pressure plate 12 is sleeved on the stacked component.

[0036] The stacking assembly includes a core shaft 11, an expansion sleeve 6, a first spring 4 and a second spring 10. The expansion sleeve 6 is sleeved on the core shaft 11. A driving block is fixedly provided at the middle position of the lower end of the expansion sleeve 6. A conical ring is sleeved at the middle position of the core shaft 11. The driving block is in contact with the core shaft 11. Both ends of the lower side of the expansion sleeve 6 are inclined surfaces.

[0037] The left end inclined surface of the lower side of the expansion sleeve 6 contacts the conical column at one end of the lower base 3, and the right end inclined surface of the lower side of the expansion sleeve 6 contacts the conical ring at the middle position of the core shaft 11. The first spring 4 and the second spring 10 are both mounted on the core shaft 11, and the first spring 4 and the second spring 10 are respectively located on the left and right sides of the driving block. The first spring 4 is located on the right side of the conical column at one end of the lower base 3, and the second spring 10 is located on the left side of the conical ring at the middle position of the core shaft 11.

[0038] The stacking assembly can quickly install the punching sheet 9. The expansion and contraction of the expansion sleeve 6 makes the operation of stacking the punching sheet 9 easier and prevents the punching sheet 9 from being deformed due to forced installation. After the expansion sleeve 6 is expanded, the internal control of the punching sheet 9 is fixed to prevent it from slipping.

[0039] The left end of the mandrel 11 is located in the first through hole, and a screw 1 is threadedly arranged at the center of the left end of the mandrel 11. The screw 1 is located in the hole formed by the mandrel 11, and the screw 1 is fixedly connected to the lower base 3 and the mandrel 11. A limiting groove is formed on the upper pressing plate 12, and the limiting groove is located on the right side of the conical ring.

[0040] The right end of the mandrel 11 is provided with an external thread, and a locking nut 13 is rotatably provided on the mandrel 11, the locking nut 13 is located on the right side of the upper pressure plate 12, and the locking nut 13 is provided with an internal thread. A gasket 2 is sleeved on the screw 1, and the gasket 2 is located between the screw 1 and the lower base 3. The mandrel 11 and the driving block are integrated, the mandrel 11 and the tapered ring are integrated, and the lower base 3 and the tapered column are integrated.

[0041] The lower pad 5 has two first square grooves, in which the first key plate 7 and the second key plate 8 are respectively arranged. The upper pressing plate 12 has two second square grooves, in which the ends of the first key plate 7 and the second key plate 8 away from the lower pad 5 are respectively located, and the first key plate 7 and the second key plate 8 pass through a plurality of punching sheets 9.

[0042] The lower pad 5 and the upper pressure plate 12 are used to position the punching sheet 9 in the left-right direction, and the locking nut 13 is used to press the upper pressure plate 12 to press the multiple punching sheets 9 together, which is helpful for the subsequent bonding of the punching sheets 9.

[0043] The first key plate 7 and the second key plate 8 are located among the plurality of punching sheets 9, so that the punching sheets 9 are more orderly after installation, and the punching sheets 9 are prevented from being uneven after installation, which affects subsequent operations, and the positions of the punching sheets 9 can also be located to prevent the punching sheets 9 from rotating.

[0044] The working principle and usage process of the present utility model: sequentially sleeving the second spring 10, the expansion sleeve 6, and the first spring 4 on the mandrel 11, placing one end of the mandrel 11 into the first through hole of the lower base 3, sleeving the gasket 2 on the screw 1, fixing the positions of the mandrel 11 and the lower base 3 through the screw 1, and sleeving the lower backing plate 5 on the expansion sleeve 6;

[0045] When the screw 1 is not tightened, the mandrel 11 is in its original state, the expansion sleeve 6 is not expanded, and multiple punching sheets 9 are placed on the expansion sleeve 6. There is a clearance fit between the expansion sleeve 6 and the punching sheets 9;

[0046] Place the first key plate 7 and the second key plate 8 into the punching sheets 9. After positioning and aligning the multiple punching sheets 9, tighten the screw 1 to expand the left end of the mandrel 11, expand the expansion sleeve 6, and position the inner holes of the punching sheets 9;

[0047] Sleeve the upper pressure plate 12 on the mandrel 11, rotatably connect the locking nut 13 to the mandrel 11, rotate the locking nut 13 to press the upper pressure plate 12, and then bond the multiple punching sheets 9 together by welding or heating glue;

[0048] After completing the assembly of the punching sheets 9, loosen the locking nut 13, remove the upper pressure plate 12, then loosen the screw 1. Under the elastic force of the first spring 4 and the second spring 10, push open the mandrel 11 and the lower base 3, the outer diameter of the expansion sleeve 6 shrinks, and take out the punching sheet 9 assembly.

[0049] The above is only a preferred embodiment of the present utility model and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed as above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to it as equivalent embodiments within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A stacked mandrel with a tensioning structure, characterized in that: It includes a lower base (3) and a stacked assembly. A conical column is fixedly arranged at one end of the lower base (3). A first through hole is formed at the middle position of the lower base (3). The stacked assembly is located in the first through hole. A lower backing plate (5) and a plurality of punching sheets (9) are sleeved outside the stacked assembly. The lower backing plate (5) is located on the right side of the lower base (3). The plurality of punching sheets (9) are located on the right side of the lower backing plate (5). An upper pressure plate (12) is arranged on the right side of the plurality of punching sheets (9). The upper pressure plate (12) is sleeved on the stacked assembly. The stacked assembly includes a core shaft (11), a expansion sleeve (6), a first spring (4) and a second spring (10). The expansion sleeve (6) is sleeved on the core shaft (11). A driving block is fixedly arranged at the middle position of the lower end of the expansion sleeve (6). A conical ring is sleeved at the middle position of the core shaft (11). The driving block is in contact with the core shaft (11). Both ends of the lower side of the expansion sleeve (6) are inclined surfaces. The left inclined surface of the lower side of the expansion sleeve (6) is in contact with the conical column at one end of the lower base (3). The right inclined surface of the lower side of the expansion sleeve (6) is in contact with the conical ring at the middle position of the core shaft (11). Both the first spring (4) and the second spring (10) are sleeved on the core shaft (11). The first spring (4) and the second spring (10) are respectively located on the left and right sides of the driving block. The first spring (4) is located on the right side of the conical column at one end of the lower base (3). The second spring (10) is located on the left side of the conical ring at the middle position of the core shaft (11).

2. The stacked mandrel with a tensioning structure according to claim 1, wherein: The left end of the core shaft (11) is located in the first through hole. A screw (1) is threadedly arranged at the central position of the left end of the core shaft (11). The screw (1) fixedly connects the lower base (3) and the core shaft (11).

3. The stacked mandrel with a tensioning structure according to claim 1, wherein: External threads are provided at the right end of the core shaft (11). A locking nut (13) is rotatably arranged on the core shaft (11). The locking nut (13) is located on the right side of the upper pressure plate (12).

4. A stacked mandrel with a tensioning structure according to claim 2, wherein: A gasket (2) is sleeved on the screw (1). The gasket (2) is located between the screw (1) and the lower base (3).

5. The stacked mandrel with a tensioning structure according to claim 1, wherein: The core shaft (11) and the driving block are integrally formed. The core shaft (11) and the conical ring are integrally formed. The lower base (3) and the conical column are integrally formed.

6. The stacked mandrel with a tensioning structure according to claim 1, characterized in that: Two first square grooves are formed in the lower backing plate (5). A first key plate (7) and a second key plate (8) are respectively arranged in the two first square grooves.

7. A stacked mandrel with a tensioning structure according to claim 6, characterized in that: Two second square grooves are formed in the upper pressure plate (12). One ends of the first key plate (7) and the second key plate (8) away from the lower backing plate (5) are respectively located in the two second square grooves. The first key plate (7) and the second key plate (8) penetrate through the plurality of punching sheets (9).

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