Reshaping tool for iron core lamination stack

Abstract

The utility model discloses a shaping tool for an iron core lamination stack, and relates to the technical field of motor iron core machining tools. In the shaping tool, a supporting seat is provided with a front surface and a back surface, and the front surface of the supporting seat is used for supporting an iron core lamination stack; the expansion mandrel is arranged on the front face of the supporting seat, an annular shaft section is formed at the end, close to the supporting seat, of the expansion mandrel, an expansion shaft section is formed at the end, away from the supporting seat, of the expansion mandrel, and the annular shaft section and the expansion shaft section are integrally formed. The expansion shaft section comprises a plurality of expansion valves which are combined to form an inner conical surface; the telescopic driving piece is used for driving the supporting block to move in the axial direction of the expansion mandrel on the inner side of the inner conical face formed by combining the multiple expansion valves so that the multiple expansion valves can elastically expand outwards or retract in the radial direction of the expansion mandrel. The motor iron core prepared by the iron core lamination stack can be conveniently taken down from the shaping tool in a more labor-saving manner, and rubbing to the inner circular surface of the motor iron core can be avoided or reduced.

Description

Technical Field

[0001] The present application relates to the technical field of motor core processing tooling, and in particular to a shaping tooling for a core lamination stack. Background Art

[0002] The preparation of the motor core is generally to stack multiple layers of core laminations together to form a core lamination stack, and then connect the layers of core laminations in the core lamination stack together to form an integral structure through subsequent processes. The connection methods of the multiple layers of core laminations include but are not limited to welding, riveting or gluing.

[0003] In order to meet the requirement of neat stacking, shaping tooling is required in the stacking process to ensure that the core laminations of each layer of the core lamination stack are neatly stacked. Specifically, when stacking, the holes, slots and other features of each layer of the core lamination stack are required to be neatly arranged. By way of example and not limitation, the inner and outer circular surfaces, tooth grooves, welding grooves, positioning grooves and other structures of each layer of the core lamination stack should be neat and without misalignment.

[0004] The existing shaping tooling generally includes a positioning mandrel, a positioning rod and an upper pressure plate. The positioning mandrel is used to position and guide the inner circle of the core lamination to ensure that the radial deviation of each layer of the core laminations in the core lamination stack meets the requirements; the positioning rod is used to constrain the position of the tooth groove to ensure that the circumferential position of each layer of the core laminations in the core lamination stack meets the requirements, that is, to ensure the vertical neatness of the core lamination stack; the upper pressure plate is used to press the core laminations of each layer in the core lamination stack to prevent displacement in subsequent processes.

[0005] Usually, the size of the positioning mandrel is made to form a tight fit with the inner cylindrical surface of the core laminations to ensure the accuracy requirements, resulting in a large force being required to finally remove the prepared motor core from the shaping tooling. In addition, scratches between the positioning mandrel and the inner cylindrical surface of the motor core may also cause deformation or warping of the motor core.

[0006] Therefore, how to remove the motor core from the shaping tooling in a more labor-saving manner and avoid or reduce scratches on the inner circular surface of the motor core is still a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0007] In view of this, in order to solve the above technical problems, the present application provides a shaping tool for a core lamination stack.

[0008] To achieve the above-mentioned purpose, the present application provides a shaping tool for a core lamination stack, the shaping tool is used to shape the core lamination stack, the core lamination stack includes multiple layers of core laminations, and the shaping tool includes:

[0009] A support seat having a front side and a back side, wherein the front side of the support seat is used for supporting the iron core lamination stack;

[0010] The expansion mandrel is arranged on the front side of the support seat, the end of the expansion mandrel close to the support seat forms an annular shaft section, the end of the expansion mandrel away from the support seat forms an expansion shaft section, and the annular shaft section and the expansion shaft section are integrally formed; the expansion shaft section includes a plurality of expansion petals, and the plurality of expansion petals are combined to form an inner cone surface;

[0011] And a telescopic driving member and a support block, the telescopic driving member is used to drive the support block to move axially along the expansion core shaft on the inner side of the inner cone surface formed by the combination of multiple expansion petals so that the multiple expansion petals can elastically expand or retract radially along the expansion core shaft.

[0012] Beneficial effect: Different from the prior art, in the present application, the cooperation between the support block and the inner conical surface formed by the combination of the multiple expansion petals is utilized, so that when the telescopic driving member drives the support block to move along the axial direction of the expansion core shaft on the inner side of the inner conical surface formed by the combination of the multiple expansion petals, the support block can drive the multiple expansion petals to elastically expand or retract along the radial direction of the expansion shaft section. Among them, the multiple expansion petals elastically expand along the radial direction of the expansion shaft section to enlarge the outer circular surface of the expansion shaft section, and then can tighten the inner circular surface of each layer of the core laminations in the core lamination stack, so that the inner circular surface of each layer of the core laminations in the core lamination stack is aligned. The radial elastic retraction of the multiple expansion petals along the expansion core shaft can shrink the enlarged outer circular surface of the expansion shaft section, thereby loosening the motor core, so that the motor core prepared by the core lamination stack can be removed from the shaping tooling more easily and can avoid or reduce scratches on the inner circular surface of the motor core. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of stacking and pressing the core lamination stack in an embodiment of the shaping tool for the core lamination stack of the present application;

[0014] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure of the shaping tooling of the core lamination stack and the assembly structure of the core lamination stack;

[0015] Figure 3 yes Figure 1 A top view schematic diagram of the shaping tooling of the middle core lamination stack and the assembly structure of the core lamination stack after the upper pressing plate is removed;

[0016] Figure 4 yes Figure 1 Schematic diagram of the shaping tool for the middle core lamination stack after removing the upper pressing plate and stacking the core laminations;

[0017] Figure 5 yes Figure 4 Schematic diagram of the shaping tool of the middle core lamination stack after the core laminations are stacked and the upper pressing plate is set;

[0018] Figure 6 yes Figure 5Schematic diagram of the shaping tool for the core lamination stack after the motor core is prepared and exits the tensioning state.

[0019] Description of Reference Numerals

[0020] 100-shaping tool; 200-core lamination stack; 210-core lamination; 211-inner circular surface of core lamination; 212-tooth groove of core lamination; 110-support seat; 120-expansion mandrel; 130-support block; 131-outer cone; 140-telescopic drive member; 150-positioning rod; 160-pressing assembly; 300-motor core;

[0021] 111-lower stop block; 112-installation groove; 121-annular shaft section; 122-expansion shaft section; 123-expansion flap; 124-inner cone; 125-dividing groove; 141-device body; 142-telescopic rod; 161-upper pressure plate; 162-rotating adjustment member; 163-hollow opening. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0023] See also Figure 1-Figure 3 The shaping tool 100 of the core lamination stack 200 of the present application is used to shape the core lamination stack 200, and the core lamination stack 200 includes multiple layers of core laminations 210. Through the shaping of the shaping tool 100, the core laminations 210 of each layer in the core lamination stack 200 can be stacked neatly. The shaping tool 100 includes a support seat 110, an expansion mandrel 120, a support block 130, and a telescopic driving member 140.

[0024] The support seat 110 has a front side and a back side, and the front side of the support seat 110 is used to support the core lamination stack 200. The expansion mandrel 120 is arranged on the front side of the support seat 110, and the end of the expansion mandrel 120 close to the support seat 110 forms an annular shaft section 121, and the end of the expansion mandrel 120 away from the support seat 110 forms an expansion shaft section 122, and the annular shaft section 121 and the expansion shaft section 122 are integrally formed. The expansion shaft section 122 includes a plurality of expansion petals 123, and the plurality of expansion petals 123 are combined to form an inner conical surface 124. The telescopic drive member 140 is used to drive the support block 130 to move along the axial direction of the expansion mandrel 120 on the inner side of the inner conical surface 124 formed by the combination of the plurality of expansion petals 123 to drive the plurality of expansion petals 123 to elastically expand or retract along the radial direction of the expansion mandrel 120.

[0025] In the above manner, the annular shaft segment 121 integrally formed with the multiple expansion shaft segments 122 can support and connect the multiple expansion shaft segments 122. By utilizing the cooperation between the support block 130 and the inner conical surface 124 formed by the combination of the multiple expansion petals 123, when the telescopic driving member 140 drives the support block 130 to move along the axial direction of the expansion core shaft 120 on the inner side of the inner conical surface 124 formed by the combination of the multiple expansion petals 123, the support block 130 can drive the multiple expansion petals 123 to elastically expand or retract along the radial direction of the expansion shaft segment 122. The elastic expansion of the multiple expansion petals 123 along the radial direction of the expansion shaft segment 122 enlarges the outer circumferential surface of the expansion shaft segment 122, thereby tightening the inner circumferential surface of each layer of the core laminations 210 in the core lamination stack 200, so that the inner circumferential surfaces of each layer of the core laminations 210 in the core lamination stack 200 are aligned. The radial elastic retraction of the multiple expansion petals 123 along the expansion core shaft 120 can shrink the enlarged outer circumferential surface of the expansion shaft segment 122, thereby loosening the motor core 300, so that the motor core 300 prepared by the core lamination stack 200 can be removed from the shaping tool 100 more easily and scratches on the inner circumferential surface of the motor core 300 can be avoided or reduced.

[0026] It should be noted that the annular shape of the annular shaft segment 121 may be a shape surrounding the axial direction of the expansion core shaft 120. The multiple expansion petals 123 of the expansion shaft segment 122 may be divided by multiple dividing grooves 125 arranged in the circumferential direction of the expansion shaft segment 122.

[0027] By way of example and not limitation, the core laminations 210 in the core lamination stack 200 include but are not limited to punching sheets made of silicon steel sheets. The support block 130 is formed with an outer conical surface 131, and the outer conical surface 131 of the support block 130 abuts against the inner conical surface 124 formed by the combination of the plurality of expansion petals 123. The outer conical surface 131 of the support block 130 and the inner conical surface 124 formed by the combination of the plurality of expansion petals 123 may be a conical surface, but is not limited thereto.

[0028] Further, see Figure 1-Figure 3 The shaping tool 100 includes a positioning rod 150, which is arranged on the support seat 110 and located at the periphery of the expansion mandrel 120. The positioning rod 150 extends along the axial direction of the expansion mandrel 120 and is used to position the circumference of each layer of core laminations 210 of the core lamination stack 200. In this way, the corresponding structures of each layer of core laminations 210 of the core lamination stack 200 on the circumference can be aligned in the vertical direction. By way of example and not limitation, a plurality of positioning rods 150 are distributed around the expansion mandrel 120 on the periphery of the expansion mandrel 120.

[0029] Alternatively, if Figure 1As shown, the lower end of the positioning rod 150 is loosely matched with the support seat 110 and is disposed on the support seat. By way of example and not limitation, the positioning rod 150 is a rectangular columnar rod, but is not limited thereto. In other examples, the positioning rod 150 can be a columnar rod of other shapes, including but not limited to regular shapes such as a circle, a square, a triangle, and a trapezoid.

[0030] Further, see Figure 1-Figure 3 The shaping tool 100 includes a clamping assembly 160, which is used to cooperate with the support seat 110 to clamp the upper and lower sides of the core lamination stack 200 to compress the multiple layers of core laminations 210 in the core lamination stack 200. In this way, the core laminations 210 of each layer in the core lamination stack 200 can be compressed to prevent displacement in subsequent processes. The subsequent process is, for example, a process for connecting the core laminations 210 of each layer in the core lamination stack 200 together to form an integral structure to prepare the motor core 300. For the sake of convenience, the subsequent process is referred to as a connecting process. By way of example and not limitation, the connection methods of the connecting process include but are not limited to welding, riveting or gluing.

[0031] Further, see Figure 1-Figure 3 The clamping assembly 160 includes an upper pressing plate 161 and a plurality of rotating adjusting members 162. The upper pressing plate 161 is arranged opposite to the support seat 110 and cooperates with the guide of the positioning rod 150 so as to be relatively away from or close to the support seat 110 along the positioning rod 150. The rotating adjusting member 162 connects the upper pressing plate 161 to the support seat 110 by a detachable thread. The plurality of rotating adjusting members 162 are distributed on the outer periphery of the expansion mandrel 120 and are spaced apart from the expansion mandrel 120 to enclose a receiving space for the core stack 200, and the core stack 200 is received in the receiving space. The rotating adjusting member 162 can rotate to adjust the spacing distance between the upper pressing plate 161 and the support seat 110.

[0032] In the above manner, the rotating adjustment member 162 is rotated in the direction of reducing the spacing between the upper pressing plate 161 and the support seat 110, that is, the upper pressing plate 161 can press the core stack 200 to prevent the core stack 210 in the core stack 200 from shifting in the subsequent connection process. The rotating adjustment member 162 is rotated in the direction of increasing the spacing between the upper pressing plate 161 and the support seat 110 and releasing the threaded connection between the upper pressing plate 161 and the support seat 110, so that the upper pressing plate 161 can be removed from the support seat 110, so that the prepared motor core 300 can be removed from the shaping tool 100.

[0033] In one example, the rotating adjustment member 162 includes but is not limited to a bolt. The bolt passes through the upper pressing plate 161 and is threadedly connected to the support seat 110. In this way, the spacing distance between the upper pressing plate 161 and the support seat 110 can be adjusted by rotating the bolt.

[0034] In another example, the rotary adjustment member 162 includes a screw and a nut. The screw passes through the upper pressing plate 161 and is fixedly connected to the support seat 110 to prevent the screw from rotating relative to the support seat 110. The nut is threadedly connected to the screw and is located on the side of the upper pressing plate 161 away from the support seat 110. In this way, the spacing distance between the upper pressing plate 161 and the support seat 110 can be adjusted by rotating the nut. The fixed connection includes but is not limited to at least one of welding and mortise and tenon connection.

[0035] Further, see Figure 1-Figure 3 The inner diameter of the inner conical surface 124 formed by the combination of the multiple expansion petals 123 gradually increases from the end close to the support seat 110 to the end away from the support seat 110. The front of the support seat 110 corresponds to the area of ​​the support block 130 and is protruding with a lower stop block 111 located on the inner side of the annular shaft segment 121. The lower stop block 111 is used to stop the support block 130 to limit the distance that the support block 130 moves downward. When the support block 130 moves downward, it drives the multiple expansion petals 123 to elastically expand outward along the radial direction of the expansion core shaft 120. The support block 130 moves upward so that the multiple expansion petals 123 elastically retract along the radial direction of the expansion core shaft 120 under the action of its own elastic force. Preferably, the upper surface of the lower stop block 111 is not lower than the end surface of the upper end of the annular shaft segment 121. In this way, the lower stop block 111 can limit the distance that the support block 130 moves downward, thereby preventing the support block 130 from moving downward too far and causing damage to the expansion mandrel 120 .

[0036] Further, see Figure 1-Figure 3 , a mounting groove 112 is provided on the back of the support seat 110, and the telescopic driving member 140 includes a device body 141 and a telescopic rod 142. The device body 141 is provided in the mounting groove 112, and the telescopic rod 142 passes through the support seat 110 and the lower stop block 111 and is connected to the support block 130. The device body 141 is used to drive the telescopic rod 142 to extend out of the device body 141 or retract toward the device body 141. In this way, by providing the device body 141 in the mounting groove 112, the support seat 110 can be used to protect the device body 141, reduce or avoid the collision of the device body 141 with external objects, and reduce the overall volume of the shaping tool 100. Optionally, the device body 141 is a pneumatic cylinder or an electric cylinder, but is not limited thereto.

[0037] Further, see Figure 1-Figure 3 The upper pressing plate 161 is provided with a hollow opening 163 in the area corresponding to the supporting block 130, and the water surface projection of the supporting block 130 is located within the horizontal projection of the hollow opening 163. In this way, the supporting block 130 can be prevented from hitting the upper pressing plate 161 when moving upward.

[0038] It should be noted that the horizontal projection in the present application refers to the projection of the corresponding structure in the shaping tool 100 on the same plane perpendicular to the axial direction of the expansion mandrel 120 .

[0039] Further, see Figure 1-Figure 3 When the plurality of expansion petals 123 are elastically expanded, the horizontal projection of the expansion mandrel 120 is located within the horizontal projection of the hollow opening 163. In this way, it is possible to avoid scratching between the expansion petals 123 and the upper pressing plate 161.

[0040] See below Figure 4-Figure 6 , a method for preparing the motor core 300 is described. The method for preparing the motor core 300 includes steps S11 to S15.

[0041] Step S11: Comparison Figure 1 and Figure 2 See also Figure 4 , provide the above-mentioned shaping tool 100, and make the shaping tool 100 enter a tensioned state.

[0042] Specifically, the upper pressure plate 161 in the shaping tool 100 is removed, and the telescopic drive member 140 is used to drive the support block 130 to move downward so that the multiple expansion petals 123 are elastically expanded along the radial direction of the expansion core shaft 120 to enlarge the outer circumferential surface of the expansion shaft section 122, so that the shaping tool 100 enters a tensioned state.

[0043] Step S12: Comparison Figure 1 and Figure 2 See also Figure 4 The core laminations 210 are stacked on the shaping tool 100 in a tensioned state to form a core lamination stack 200 .

[0044] Specifically, when placing each core lamination 210, the inner circumferential surface of the core lamination 210 is aligned with the expansion mandrel 120 and the tooth groove 212 of the core lamination 210 is aligned with the positioning rod 150, so that the inner circumferential surface of the core lamination 210 is guided and matched with the expansion mandrel 120, and the tooth groove 212 of the core lamination 210 is guided and matched with the positioning rod 150, and then the core lamination 210 is placed on the shaping tool 100. In this way, a neat core lamination stack 200 can be formed as the core laminations 210 are stacked.

[0045] Step S13: Comparison Figure 4 See also Figure 5 , an upper pressing plate 161 is installed on the shaping tool 100 after the core lamination stack 200 is stacked, and the distance between the upper pressing plate 161 and the support seat 110 is reduced by adjusting the rotary adjusting member 162 so that the upper pressing plate 161 presses the upper side of the core lamination stack 200 .

[0046] Step S14: Combination Figure 4 See also Figure 5 Through the connection process, the core laminations 210 of each layer in the core lamination stack 200 compressed by the upper pressing plate 161 on the shaping tool 100 are connected together to form an integral structure to prepare the motor core 300.

[0047] Specifically, the connection methods of the connection process include but are not limited to welding, riveting or gluing.

[0048] Step S15 (step S15 is not shown): the shaping tool 100 is withdrawn from the tensioning state, and the prepared motor core 300 is taken out.

[0049] Specifically, the upper pressing plate 161 of the shaping tool 100 is removed, and the telescopic driving member 140 is used to drive the support block 130 to move upward so that the plurality of expansion petals 123 elastically retract along the radial direction of the expansion core shaft 120, so that the enlarged outer circumference of the expansion shaft section 122 is reduced, thereby loosening the motor core 300, that is, the shaping tool 100 is released from the tensioned state. After the shaping tool 100 is released from the tensioned state, the prepared motor core 300 can be taken out.

[0050] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A shaping tool for a core lamination stack, characterized in that: The shaping tool is used for shaping a core lamination stack, wherein the core lamination stack includes multiple layers of core laminations, and the shaping tool includes: A support seat, having a front side and a back side, wherein the front side of the support seat is used to support the core lamination stack; An expansion mandrel is arranged on the front side of the support seat, wherein one end of the expansion mandrel close to the support seat forms an annular shaft section, and one end of the expansion mandrel away from the support seat forms an expansion shaft section, and the annular shaft section and the expansion shaft section are integrally formed; the expansion shaft section includes a plurality of expansion petals, and the plurality of expansion petals are combined to form an inner conical surface; And a telescopic driving member and a support block, the telescopic driving member is used to drive the support block to move axially along the expansion core shaft on the inner side of the inner cone surface formed by the combination of the multiple expansion petals so that the multiple expansion petals can elastically expand or retract radially along the expansion core shaft.

2. The shaping tool according to claim 1, characterized in that: The shaping tool includes a positioning rod, which is arranged on the support seat and located at the outer periphery of the expansion core shaft. The positioning rod extends along the axial direction of the expansion core shaft and is used to position the circumference of each layer of core laminations of the core lamination stack.

3. The shaping tool according to claim 2, characterized in that: The shaping tool comprises a clamping assembly, and the clamping assembly is used to cooperate with the support seat to clamp the upper and lower sides of the core lamination stack to compress the multiple layers of core laminations in the core lamination stack.

4. The shaping tool according to claim 3, characterized in that: The clamping assembly includes an upper pressure plate and a plurality of rotating adjustment members; the upper pressure plate is arranged opposite to the support seat and cooperates with the positioning rod guide; the rotating adjustment member detachably connects the upper pressure plate and the support seat with threads; the plurality of rotating adjustment members are distributed on the periphery of the expansion mandrel and are spaced apart from the expansion mandrel to enclose a accommodating space for the core stack; the rotating adjustment member can be rotated to adjust the spacing distance between the upper pressure plate and the support seat.

5. The shaping tool according to claim 4, characterized in that: The inner diameter of the inner conical surface formed by the combination of the multiple expansion petals gradually increases from the end close to the support seat to the end away from the support seat; the front side of the support seat is provided with a lower stop block located on the inner side of the annular shaft segment protruding from the area corresponding to the support block, and the lower stop block is used to stop the support block to limit the downward movement distance of the support block; The support block moves downward to drive the multiple expansion petals to elastically expand radially along the expansion core shaft, and the support block moves upward to cause the multiple expansion petals to elastically retract radially along the expansion core shaft under the action of their own elastic force.

6. The shaping tool according to claim 5, characterized in that: A mounting groove is provided on the back side of the support seat, and the telescopic driving component includes a device body and a telescopic rod. The device body is arranged in the mounting groove, and the telescopic rod passes through the support seat and the lower stop block and is connected to the support block; the device body is used to drive the telescopic rod to extend out of the device body or retract toward the device body.

7. The shaping tool according to claim 6, characterized in that: The device body is a pneumatic cylinder or an electric cylinder.

8. The shaping tool according to claim 4, characterized in that: The upper pressing plate is provided with a hollow opening in a region corresponding to the supporting block, and the water surface projection of the supporting block is located within the horizontal projection of the hollow opening.

9. The shaping tool according to claim 1, characterized in that: The support block is formed with an outer conical surface, and the outer conical surface of the support block conflicts with the inner conical surface formed by the combination of the plurality of expansion petals.

10. The shaping tool according to claim 8, characterized in that: When the multiple expansion petals are elastically expanded, the horizontal projection of the expansion core shaft is located within the horizontal projection of the hollow opening.

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