Stator core press fitting tool

Abstract

The utility model provides a stator iron core press-fitting tool. The stator iron core press-fitting tool comprises a lower pressure plate, a tire core, an upper pressure plate, a positioning piece and a tensioning assembly. According to the stator iron core press-fitting tool provided by the utility model, the lower pressure plate is arranged, and the bottom of the lower pressure plate is provided with the plurality of cushion blocks of which the top surfaces are positioned on the same horizontal plane. A circular positioning groove is formed in the top of the lower pressing disc, and the circular positioning groove and the lower pressing disc are coaxially arranged. The outer side face of the tire core is of a cylindrical structure, and the bottom end of the tire core is installed in the circular positioning groove. And the outer side of the tire core is also sleeved with an upper pressure plate. Locating keys arranged in the vertical direction are arranged between the upper pressing disc and the tire core and between the lower pressing disc and the tire core, and the upper pressing disc and the lower pressing disc can be guided to be in a parallel state all the time through locating pieces. When the tensioning assembly pulls the lower pressing disc to move downwards, the upper pressing disc and the lower pressing disc can be kept parallel, the extrusion precision is guaranteed, and the quality of the stator iron core after press-fitting forming is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor production, and in particular relates to a stator core press-fitting tool. Background Art

[0002] The core punching of the motor is usually stamped from silicon steel sheets. Due to the size limitation of silicon steel sheets, some large-diameter stator punchings are usually made into fan-shaped sheets. The core and the base are designed to be an interference fit, so the core can be assembled with the base after the press-fitting is completed. At present, a press-fitting tool is usually used to extrude multiple punchings through upper and lower extrusion plates to complete the press-fitting of the core. However, due to the weak guiding accuracy between the upper and lower pressing plates of the current press-fitting tool, the upper pressing plate and the lower pressing plate are prone to relative tilt during the press-fitting process. This will further affect the forming quality of the stator core. Utility Model Content

[0003] The embodiment of the utility model provides a stator core press-fitting tool, aiming to solve the problem in the prior art that the stator core press-fitting tool has low precision and is easy to affect the core forming quality.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a stator core press-fitting tool, comprising:

[0005] A lower pressure plate, wherein the top surface of the lower pressure plate is concavely provided with a circular positioning groove coaxially arranged with the lower pressure plate, and the inner wall of the circular positioning groove is concavely provided with a first key groove;

[0006] A fetal core is installed inside the circular positioning groove, and a second key groove is arranged on the outer side wall of the fetal core and is arranged opposite to the first key groove;

[0007] An upper pressure plate, which is sleeved on the outer side of the fetal core and located above the lower pressure plate, and the upper pressure plate is slidably arranged on the fetal core along a vertical direction, and a third key groove is arranged on the upper pressure plate and is arranged opposite to the second key groove;

[0008] A positioning key is installed in the second key slot, one end of the positioning key is located in the first key slot, and the positioning key is slidably arranged in the third key slot;

[0009] The tensioning assembly is arranged between the upper pressure plate and the lower pressure plate, and is used for pulling the upper pressure plate to move downward.

[0010] In a possible implementation, an annular boss for mounting the stator pressure ring is provided on one side of the upper pressure plate opposite to the lower pressure plate, and an outer wall of the annular boss is slidably matched with an inner wall of the stator pressure ring.

[0011] In a possible implementation, a positioning rod for inserting into the punching slot on the punching sheet is also installed on the lower pressure plate, and the shape of the positioning rod is adapted to the punching slot on the punching sheet.

[0012] In a possible implementation, a top end of the positioning rod is provided with a chamfer to facilitate the positioning rod to slide into the punching groove on the punching sheet.

[0013] In a possible implementation, a middle portion of the positioning rod is provided with a yield for reducing the contact area between the positioning rod and the punching sheet.

[0014] In a possible implementation, a plurality of annular support ribs are installed on the inner wall of the fetal core, and the plurality of annular support ribs are arranged in sequence and spaced apart in the vertical direction.

[0015] In a possible implementation, the tensioning assembly includes:

[0016] A pull rod, the two ends of which are respectively arranged through the upper pressure plate and the lower pressure plate;

[0017] There are two tightening pieces, which are respectively threadedly connected to the ends of the pull rods, and the two tightening pieces are respectively pressed against the opposite sides of the upper pressure plate and the lower pressure plate.

[0018] In a possible implementation, the upper pressure plate and the lower pressure plate are both provided with a plurality of mounting holes for mounting the pull rod, the pull rod is slidably arranged inside the mounting holes, and the plurality of mounting holes are evenly spaced along the circumference of the upper pressure plate or the lower pressure plate.

[0019] Compared with the prior art, the solution shown in the embodiment of the present application is provided with a lower pressure plate, and a plurality of pads with top surfaces located on the same horizontal plane are installed at the bottom of the lower pressure plate. A circular positioning groove is arranged on the top of the lower pressure plate, and the circular positioning groove is arranged coaxially with the lower pressure plate. The outer side surface of the fetal heart is a cylindrical structure, and the bottom end of the fetal heart is installed inside the circular positioning groove. An upper pressure plate is also mounted on the outside of the fetal heart. Positioning keys arranged in the vertical direction are arranged between the upper pressure plate, the lower pressure plate and the fetal heart, and the upper pressure plate and the lower pressure plate can be guided to always maintain a parallel state through the positioning member. When the tensioning assembly pulls the lower pressure plate to move downward, the upper pressure plate and the lower pressure plate can be kept parallel, so as to ensure the extrusion accuracy and improve the quality of the stator core after press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a stator core press-fitting tool provided in an embodiment of the utility model;

[0021] Figure 2A structural schematic diagram of the working state of the stator core press-fitting tooling provided in an embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Lower pressure plate; 11. Circular positioning groove; 2. Fetal heart; 21. Annular support rib; 3. Upper pressure plate; 4. Positioning key; 5. Tensioning assembly; 51. Pull rod; 52. Tightening piece; 6. Annular boss; 7. Positioning rod; 8. Stator pressure ring; 9. Punching sheet. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Please also read Figure 1 and Figure 2 , the stator core press-fitting tool provided by the utility model is now described. The stator core press-fitting tool comprises a lower platen 1, a tire core 2, an upper platen 3, a positioning key 4 and a tensioning assembly 5. The top surface of the lower platen 1 is concavely provided with a circular positioning groove 11 coaxially arranged with the lower platen 1, and a first key groove is concavely provided on the inner wall of the circular positioning groove 11; the tire core 2 is installed inside the circular positioning groove 11, and a second key groove opposite to the first key groove is provided on the outer side wall of the tire core 2; the upper platen 3 is sleeved on the outer side of the tire core 2 and is located above the lower platen 1, the upper platen 3 is slidably arranged on the tire core 2 in the vertical direction, and a third key groove opposite to the second key groove is provided on the upper platen 3; the positioning key 4 is installed inside the second key groove, one end of the positioning key 4 is located inside the first key groove, and the positioning key 4 is slidably arranged inside the third key groove; the tensioning assembly 5 is arranged between the upper platen 3 and the lower platen 1, and is used to pull the upper platen 3 to move downward.

[0026] Compared with the prior art, the stator core press-fitting tool provided in this embodiment is provided with a lower pressure plate 1, and a plurality of pads with top surfaces located on the same horizontal plane are installed at the bottom of the lower pressure plate 1. A circular positioning groove 11 is provided on the top of the lower pressure plate 1, and the circular positioning groove 11 is coaxially arranged with the lower pressure plate 1. The outer side surface of the fetal core 2 is a cylindrical structure, and the bottom end of the fetal core 2 is installed inside the circular positioning groove 11. An upper pressure plate 3 is also mounted on the outside of the fetal core 2. Positioning keys 4 arranged in the vertical direction are provided between the upper pressure plate 3 and the lower pressure plate 1 and the fetal core 2, and the upper pressure plate 3 and the lower pressure plate 1 can be guided to always maintain a parallel state through the positioning member. When the tensioning assembly 5 pulls the lower pressure plate 1 to move downward, the upper pressure plate 3 can be kept parallel to the lower pressure plate 1, so as to ensure the extrusion accuracy and improve the quality of the stator core after press-fitting.

[0027] Specifically, in this embodiment, when the stator core press-fitting tool is used, a plurality of pads are evenly placed on the platform, and the lower pressure plate 1 is placed on the pads. Then the fetal core 2 is placed inside the circular positioning groove 11 to prevent the fetal core 2 from moving relative to the lower pressure plate 1. Then the punching sheet 9 begins to drop, and the punching sheet 9 falls on the lower pressure plate 1. When the punching sheet 9 falls to the required height, the upper pressure plate 3 is installed on the fetal core 2, and the upper pressure plate 3 is pulled downward by the tensioning assembly 5 to press the core to a length that meets the requirements of the drawing. The press-fitting of the core is completed.

[0028] Preferably, in this embodiment, the fetal core 2 is a cylindrical structure whose outer shape is matched with the inner hole of the iron core.

[0029] In some embodiments, the upper platen 3 may be Figure 1 , Figure 2 See also Figure 1 , Figure 2 , an annular boss 6 for mounting the stator pressing ring 8 is provided on the side opposite to the upper pressing plate 3 and the lower pressing plate 1, and the outer wall of the annular boss 6 is slidably matched with the inner wall of the stator pressing ring 8. The inner hole of the annular boss 6 is slidably matched with the tire core 2, and the outer ring size of the annular boss 6 is slightly smaller than the inner hole size of the stator pressing ring 8. Therefore, after the stator pressing ring 8 is placed, the stability of the position of the stator pressing ring 8 can be ensured.

[0030] In some embodiments, the lower platen 1 may be Figure 1 , Figure 2 See also Figure 1 , Figure 2 The lower platen 1 is also provided with a positioning rod 7 for inserting into the punching slot on the punching sheet 9. The shape of the positioning rod 7 is adapted to the punching slot on the punching sheet 9. When in use, the punching sheet 9 is placed on the lower platen 1. When the punching sheet 9 is placed to a height of 30 mm, the positioning rod 7 is inserted into the punching slot on the punching sheet 9. Thus, the punching sheet 9 placed later can be guided by the positioning rod 7 to ensure the stability of the placement position of the punching sheet 9. The forming quality of the stator core after pressing and forming is further improved.

[0031] Preferably, in this embodiment, there are multiple positioning rods 7 , and the multiple positioning rods 7 are evenly spaced apart along the circumference of the fetal heart 2 .

[0032] Preferably, in this embodiment, a mounting groove for installing the positioning rod 7 is also provided on the lower pressure plate 1. The bottom end of the positioning rod 7 can be preferably installed inside the mounting groove, or the positioning rod 7 can be placed inside the mounting groove after the placement height of the punching sheet 9 reaches 30 mm.

[0033] In some embodiments, the positioning rod 7 can be used as follows: Figure 1 , Figure 2 See also Figure 1 , Figure 2 The top of the positioning rod 7 is provided with a chamfer to facilitate the positioning rod 7 to slide into the inside of the punching groove on the punching sheet 9. There are two chamfers, which are respectively located on both sides of the positioning rod 7. The setting of the chamfer can automatically correct the position of the punching sheet 9 through the guidance of the punching groove on the punching sheet 9 and the chamfer when the punching sheet 9 is placed on the lower pressing plate 1 after the positioning rod 7 is installed.

[0034] In some embodiments, the positioning rod 7 can be used as follows: Figure 1 , Figure 2 See also Figure 1 , Figure 2 The middle part of the positioning rod 7 is provided with a clearance for reducing the contact area between the positioning rod 7 and the punching sheet 9. The cross section of the positioning rod 7 is a square structure. The side of the positioning rod 7 used to limit the position of the punching sheet 9 is provided with a clearance, which can reduce the contact area between the positioning rod 7 and the punching sheet 9, reduce the friction between the positioning rod 7 and the punching sheet 9, and allow the punching sheet 9 to fall freely when the punching sheet 9 is placed.

[0035] In some embodiments, the fetal heart 2 may be Figure 1 , Figure 2 See also Figure 1 , Figure 2 , a plurality of annular support ribs 21 are installed on the inner wall of the fetal core 2, and the plurality of annular support ribs 21 are arranged in sequence and at intervals along the vertical direction. The fetal core 2 is made of large pipe fittings, and a plurality of annular support ribs 21 are installed inside the fetal core 2. The plurality of support ribs are used to support the inner wall of the fetal core 2 to prevent the fetal core 2 from being squeezed and deformed when tightening between the upper pressure plate 3 and the lower pressure plate 1. The strength of the entire fetal core 2 is enhanced by the arrangement of the annular support ribs 21. On the one hand, the overall weight of the fetal core 2 can be reduced, and at the same time, the stability of the appearance of the fetal core 2 during use can be ensured.

[0036] Specifically, in this embodiment, at least two threaded through holes are provided on the annular support rib 21, and the threaded through holes are used to install the lifting ring. At least two threaded through holes for installing the lifting ring are provided on both the upper platen 3 and the lower platen 1, so as to facilitate the lifting of the upper platen 3 and the lower platen 1.

[0037] In some embodiments, the tensioning assembly 5 may be configured as follows: Figure 1 , Figure 2 See also Figure 1 , Figure 2, the tensioning assembly 5 includes a tie rod 51 and a tightening piece 52. The two ends of the tie rod 51 pass through the upper platen 3 and the lower platen 1 respectively; there are two tightening pieces 52, and the two tightening pieces 52 are respectively threadedly connected to the ends of the tie rod 51, and the two tightening pieces 52 are respectively against the opposite sides of the upper platen 3 and the lower platen 1. The tie rod 51 is a screw with threads at both ends, and the tightening piece 52 is a nut. When in use, after the upper platen 3 is installed on the tire core 2, multiple tie rods 51 are successively inserted into the upper platen 3, the punching groove of the punching piece 9, and the lower platen 1, and then the tightening piece 52 is installed on the two ends of the tie rod 51. Use a wrench to cross, symmetrically, step by step, and evenly tighten the nuts until the core meets the length required by the drawing. It is easy to operate and facilitates the core press-fitting.

[0038] In some embodiments, the upper platen 3 and the lower platen 1 may be formed as follows: Figure 1 , Figure 2 See also Figure 1 , Figure 2 , the upper platen 3 and the lower platen 1 are both provided with a plurality of mounting holes for installing the tie rods 51, the tie rods 51 are slidably arranged inside the mounting holes, and the plurality of mounting holes are evenly spaced along the circumference of the upper platen 3 or the lower platen 1. The two ends of the tie rod 51 are respectively slidably arranged inside the mounting holes on the upper platen 3 and the lower platen 1. And the plurality of tie rods 51 are used to guide the lower platen 1 to always remain parallel to the lower platen 1 during the downward movement. The verticality of the press-fitted core is ensured, and the quality of the formed core is improved. And the provision of the plurality of mounting holes can symmetrically tighten the core when the upper platen 3 is tightened by the tightening member 52, thereby ensuring the quality of the core.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator core press-fitting tool, characterized in that: include: A lower pressure plate (1), wherein a circular positioning groove (11) coaxially arranged with the lower pressure plate (1) is recessed on the top surface of the lower pressure plate (1), and a first key groove is recessed on the inner wall of the circular positioning groove (11); A fetal core (2) is installed inside the circular positioning groove (11), and a second key groove is arranged on the outer side wall of the fetal core (2) and is arranged opposite to the first key groove; An upper pressure plate (3) is sleeved on the outer side of the fetal core (2) and is located above the lower pressure plate (1). The upper pressure plate (3) is slidably arranged on the fetal core (2) in a vertical direction. The upper pressure plate (3) is provided with a third key groove arranged opposite to the second key groove. A positioning key (4) is installed inside the second key slot, one end of the positioning key (4) is located inside the first key slot, and the positioning key (4) is slidably arranged inside the third key slot; A tensioning assembly (5) is arranged between the upper pressure plate (3) and the lower pressure plate (1) and is used to pull the upper pressure plate (3) to move downward.

2. The stator core press-fitting tool according to claim 1, characterized in that: An annular boss (6) for mounting a stator pressure ring (8) is provided on one side of the upper pressure plate (3) opposite to the lower pressure plate (1), and the outer wall of the annular boss (6) is slidably matched with the inner wall of the stator pressure ring (8).

3. The stator core press-fitting tool according to claim 1, characterized in that: The lower pressure plate (1) is also provided with a positioning rod (7) for inserting into the upper punching slot of the punching sheet (9), and the shape of the positioning rod (7) is adapted to the upper punching slot of the punching sheet (9).

4. The stator core press-fitting tool as claimed in claim 3, characterized in that: The top end of the positioning rod (7) is provided with a chamfer that facilitates the positioning rod (7) to slide into the interior of the punching groove on the punching sheet (9).

5. The stator core press-fitting tool according to claim 4, characterized in that: The middle part of the positioning rod (7) is provided with a yield point for reducing the contact area between the positioning rod (7) and the punching sheet (9).

6. The stator core press-fitting tool according to claim 1, characterized in that: A plurality of annular support ribs (21) are installed on the inner wall of the fetal core (2), and the plurality of annular support ribs (21) are arranged in sequence and spaced apart in the vertical direction.

7. The stator core press-fitting tool according to claim 1, characterized in that: The tensioning assembly (5) comprises: A pull rod (51), wherein two ends of the pull rod (51) are respectively arranged to penetrate the upper pressure plate (3) and the lower pressure plate (1); There are two tightening members (52), which are respectively threadedly connected to the ends of the pull rod (51), and the two tightening members (52) are respectively pressed against opposite sides of the upper pressure plate (3) and the lower pressure plate (1).

8. The stator core press-fitting tool according to claim 7, characterized in that: The upper pressure plate (3) and the lower pressure plate (1) are both provided with a plurality of mounting holes for mounting the pull rod (51), the pull rod (51) is slidably arranged inside the mounting holes, and the plurality of mounting holes are evenly spaced along the circumference of the upper pressure plate (3) or the lower pressure plate (1).

Images