Iron core positioning device

Abstract

The utility model provides an iron core positioning device which comprises a supporting frame, a radial positioning mechanism and a circumferential positioning mechanism, a bearing positioning mechanism used for jacking an iron core is arranged below the supporting frame, the radial positioning mechanism is arranged above the supporting frame, and the radial positioning mechanism comprises a tensioning assembly and a driving component used for driving the tensioning assembly. The tensioning assembly is located above the supporting frame and used for abutting against the inner wall of the iron core so as to limit the radial position of the upper portion of the iron core, and the circumferential positioning mechanism is connected with the supporting frame and used for being connected with a positioning groove in the outer portion of the iron core in a clamped mode so as to limit the circumferential position of the iron core. The upper surface position and the overall perpendicularity of the iron core are guaranteed, and the paper inserting effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor production and manufacturing, and particularly relates to a core positioning device. BACKGROUND

[0002] In order to realize the paper insertion function of the stator core of the flat wire motor, the core needs to be lifted and positioned. The current lifting and positioning is all for the lower surface of the core, and the position of the upper surface of the core cannot be guaranteed, especially when the paper insertion direction of the paper insertion machine is from top to bottom, the inaccurate paper insertion is caused by the unfixed position of the upper surface of the core. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a core positioning device, which solves the problem of unfixed position of the upper surface of the core in the paper insertion operation process.

[0004] The core positioning device comprises a support frame, a supporting and positioning mechanism located below the support frame and used for lifting the core, and a radial positioning mechanism and a circumferential positioning mechanism.

[0005] The radial positioning mechanism comprises a tensioning assembly located above the support frame and used for abutting against the inner wall of the core, and the radial positioning mechanism further comprises a driving component used for driving the tensioning assembly to be tensioned.

[0006] The circumferential positioning mechanism is arranged on the support frame and used for clamping the external positioning groove of the core.

[0007] In the above technical solution, on the basis of the supporting and positioning mechanism positioning the lower part of the core, the radial positioning mechanism abuts against the inner wall of the core, and the circumferential positioning mechanism clamps the external positioning groove of the core, so that the secondary positioning of the core is realized, and the position of the upper surface of the core in the paper insertion operation process is guaranteed to be accurate.

[0008] In a possible implementation, the tensioning assembly comprises at least three supporting arms, a plurality of the supporting arms are arranged along the circumferential direction of the axis of the core and can slide along the radial direction of the core, and the outer end of each supporting arm is provided with a first roller used for abutting against the inner wall of the core.

[0009] In a possible implementation, the driving component comprises a pneumatic chuck, and the pneumatic slider at the bottom of the pneumatic chuck is connected with the supporting arm to drive the movement of the supporting arm.

[0010] In a possible implementation, the driving component comprises a driving shaft which can move along the axial direction of the core, and a driving member used for driving the movement of the driving shaft.

[0011] The end of the driving shaft is provided with a first guide inclined surface.

[0012] When the driving shaft slides to the first set position, the side wall of the driving shaft abuts against the support arm, and the first roller of the support arm abuts against the inner wall of the iron core.

[0013] In a possible implementation, the tensioning assembly further comprises an elastic return member configured to retract the at least three support arms.

[0014] In a possible implementation, each support arm is provided with a second roller at an end matched with the side wall of the driving shaft.

[0015] In a possible implementation, the support frame comprises a main structure, and a first through hole provided on the main structure and configured to match with the iron core; the diameter of the first through hole is greater than the outer diameter of the iron core.

[0016] Further comprising a cross beam crossing the main structure;

[0017] The cross beam is slidably connected with the main structure along a first direction and lockable at a second set position.

[0018] The tensioning assembly is slidably connected with the cross beam along a second direction and lockable at a third set position.

[0019] The first direction is perpendicular to the second direction.

[0020] In a possible implementation, the circumferential positioning mechanism comprises a profiling key, a push cylinder and a sliding assembly; the profiling key is fixedly connected with the sliding assembly; the sliding assembly is slidably connected with the support frame along a radial direction of the iron core.

[0021] The push cylinder drives the sliding assembly to slide along the radial direction of the iron core.

[0022] In a possible implementation, the profiling key is provided with a second guide inclined surface at an end matched with the positioning groove.

[0023] In a possible implementation, the support frame is provided with a limiting block configured to limit the sliding assembly; the sliding assembly is provided with a jacking bolt matched with the limiting block; the jacking bolt is a length-adjustable jacking bolt.

[0024] In a possible implementation, the jacking bolt of the sliding assembly is sleeved with an elastic member; one end of the elastic member abuts against the jacking bolt, and the other end abuts against the limiting block.

[0025] In a possible implementation, the main body structure is provided with a table panel and a quick-mounting panel detachably connected with the table panel; the first through hole is arranged on the table panel; the quick-mounting panel is provided with a second through hole; the diameter of the second through hole is greater than the outer diameter of the iron core;

[0026] The cross beam spans the second through hole, and the cross beam is slidably connected with the quick-mounting panel along the first direction and can be locked at the second set position.

[0027] In a possible implementation, the sliding assembly is slidably connected with the quick-mounting panel; the push air cylinder is arranged on the table panel; wherein,

[0028] The piston rod of the push air cylinder is provided with a quick-mounting groove; the sliding assembly is fixedly provided with an insertion piece;

[0029] When the quick-mounting panel is fixedly connected with the table panel, the insertion piece is located in the quick-mounting groove. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a three-dimensional structure schematic diagram of a positioning device of an embodiment of the present application;

[0031] Figure 2 It is a three-dimensional structure schematic diagram of a radial positioning mechanism of an embodiment of the present application;

[0032] Figure 3 It is a top view schematic diagram of a radial positioning mechanism of an embodiment of the present application;

[0033] Figure 4 It is a bottom view schematic diagram of a radial positioning mechanism of an embodiment of the present application;

[0034] Figure 5 It is a structure schematic diagram of another driving component cooperating with a support arm provided by an embodiment of the present application;

[0035] Figure 6 It is a sectional view of another driving component cooperating with a support arm provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0037] It should be noted that the technical terms or scientific terms used in the one or more embodiments of the present disclosure should be understood as the general meaning understood by the person skilled in the art to which the present disclosure belongs, unless otherwise defined. The terms "first", "second", and the like used in the one or more embodiments of the present disclosure do not represent any order, quantity, or importance, but are only used to distinguish different components. The terms "include", "contain", and the like mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] To facilitate the understanding of the core positioning device provided by the embodiments of the present application, the application scenario thereof is first described. The core positioning device in the present application is mainly applied to the case of inserting paper from the upper surface of the core of a flat wire motor, i.e., the paper inserting device of the paper inserting machine inserts the insulating paper from the upper surface of the core. In the conventional core paper inserting operation process, only the lower surface of the core is positioned, which leads to the fact that the upper surface of the core cannot be accurately positioned, and the verticality of the core is prone to being poor. During the paper inserting operation, paper inserting failure or excessive paper scraps due to the inclination angle between the insulating paper and the core may occur. In the present application, while the lower surface of the core is positioned by the supporting and positioning mechanism, the upper surface of the core is positioned by the radial positioning mechanism, so as to ensure the verticality of the core during the core paper inserting operation.

[0039] In the present embodiment, the placement direction of the core 4 positioning device shown in Figure 1 is taken as the reference direction. The core 4 positioning device comprises a support frame 1, a supporting and positioning mechanism 2 for jacking up the core 4 is arranged below the support frame 1, and a radial positioning mechanism 3 is arranged above the support frame 1. Among them, the supporting and positioning mechanism 2, the core 4, and the radial positioning mechanism 3 are coaxially arranged. The supporting and positioning mechanism 2 is used for positioning the bottom of the core 4 and jacking up the core 4. When the core 4 is jacked into position, the radial positioning mechanism 3 is inserted into the inner cavity of the core 4, and the radial positioning mechanism 3 supports the inner wall of the upper part of the core 4, so as to position the top of the core 4 in the radial direction. Thus, the bottom and the top of the core 4 are respectively positioned by the cooperative work of the supporting and positioning mechanism 2 and the radial positioning mechanism 3, so as to ensure the verticality of the core 4 during the core paper inserting operation.

[0040] In the embodiment of the present application, the support frame 1 is used as a support structure to support the radial positioning mechanism 3, and the support frame 1 is fixedly arranged. The fixed arrangement of the support frame 1 includes various cases, such as being fixedly connected with a paper inserting machine, being fixedly connected with a tool on an existing paper inserting production line, or being fixedly arranged on the ground with supporting legs.

[0041] In the embodiment of the present application, the supporting and positioning mechanism 2 has the functions of jacking up and positioning. As an example, referring to Figure 1 , the supporting and positioning mechanism 2 includes a support surface 21, the upper portion of the support surface 21 is provided with a positioning mechanism 22, and the lower portion of the support surface 21 is provided with a jacking mechanism. The bottom surface of the iron core 4 is lifted by the support surface 21, the outer circle or inner wall of the bottom portion of the iron core 4 is positioned by the positioning mechanism 22, and the positioning and support of the iron core 4 are realized. When jacking up, the support surface 21 is driven to rise by the jacking mechanism, so that the iron core 4 is jacked up to the working height.

[0042] In the present application, the radial positioning mechanism 3 includes a driving component 31 and a tensioning assembly 32, the tensioning assembly 32 is used to tension and press against the inner wall of the iron core 4, so as to position the iron core 4 in the radial direction. The driving component 31 drives the tensioning assembly 32 to expand outward, and forms multi-point support on the upper portion of the inner wall of the iron core 4, so as to ensure the position accuracy of the upper surface of the iron core 4.

[0043] The iron core 4 positioning device in the embodiment further includes a circumferential positioning mechanism 5 arranged on the support frame 1 and used for clamping with the external positioning groove of the iron core 4. The external portion of the iron core 4 is provided with a vertical process positioning groove for positioning. When the iron core 4 is positioned, the circumferential positioning mechanism 5 is embedded into the positioning groove, so as to limit the circumferential position of the iron core 4, and ensure that the position of the paper inserting slot of the iron core 4 is consistent with the position of the paper inserting machine during the paper inserting operation.

[0044] As can be seen from the above description, in the embodiment disclosed in the present application, the iron core 4 positioning device positions the bottom portion of the iron core 4 by the supporting and positioning mechanism 2, positions the top portion of the iron core 4 by the tensioning assembly 32 of the radial positioning mechanism 3 abutting against the inner wall of the iron core 4, and positions the iron core 4 by the radial positioning mechanism 3, so as to ensure the verticality of the iron core 4 during the paper inserting operation. Furthermore, the iron core 4 is circumferentially positioned by the axial positioning mechanism, so as to ensure the accuracy of the axial and radial positions of the iron core 4 when the iron core 4 is in place, and improve the accuracy during the subsequent paper inserting.

[0045] As an optional embodiment, referring to Figures 2-4 , the tensioning assembly 32 includes at least three supporting arms 321, the at least three supporting arms 321 are circumferentially arranged, so as to form uniform radial support on the inner wall of the iron core 4. As an example, the at least three supporting arms 321 are circumferentially arranged along the axis of the iron core 4, and can slide along the radial direction of the iron core 4. The length of each supporting arm 321 in the radial direction is named as the outer end for the purpose of convenient description, which is away from the axis around which the supporting arm 321 is arranged.

[0046] When the tensioning assembly 32 is in the non-supporting state, the support arms 321 are retracted inwards and maintain a gap with the inner wall of the core 4. In this state, the core 4 can be lifted upwards by the supporting and positioning mechanism 2, and the tensioning assembly 32 can smoothly enter the inner cavity of the core 4. When the tensioning assembly 32 is positioned, the support arms 321 slide outwards and abut against the inner wall of the core 4 to form positioning. Specifically, the outer ends of the support arms 321 abut against the inner wall of the core 4.

[0047] In addition, since the core 4 is a stack of multiple silicon steel sheets, the outer wall of the core 4 is generally welded, and there is no connection relationship between the multiple silicon steel sheets of the inner wall of the core 4. If the frictional resistance between the tensioning assembly 32 and the inner wall of the core 4 is too large, the silicon steel sheets may be warped. Therefore, in the embodiment, the first rollers 322 are arranged at the outer ends of the support arms 321. When the support arms 321 of the tensioning assembly 32 abut against the inner wall of the core 4, the first rollers 322 abut against the inner wall of the core 4, and when the core 4 moves upwards or downwards, the first rollers 322 rollingly contact the inner wall of the core 4, which can reduce the resistance and prevent the silicon steel sheets from being warped.

[0048] In the embodiment, the specific number of the support arms 321 can be set according to the diameter of the inner hole of the core 4, such as 3, 4, 5, etc. The purpose is to uniformly and stably support the inner wall of the core 4 by the multiple support arms 321 to form stable radial positioning of the core 4.

[0049] The driving component 31 in the radial positioning mechanism 3 provided in the embodiment can adopt different structures, such as a pneumatic driving component 31, a hydraulic driving component 31, an electric driving component 31, or a mechanical structure driving, etc. The driving component 31 only needs to be able to drive the tensioning assembly 32 to expand outwards. The structures of several specific driving components 31 are listed below.

[0050] In one example, the driving component 31 is a pneumatic chuck. The arrangement of the pneumatic chuck is specifically referred to Figures 2-4 At least three pneumatic sliders are arranged at the bottom circumference of the pneumatic chuck, wherein the number of the pneumatic sliders corresponds to the number of the support arms 321 one by one, and the support arms 321 are connected to the corresponding pneumatic sliders by bolts or other components. The pneumatic chuck is generally provided with two gas paths, one of which controls the inward retraction movement of the pneumatic sliders, and the other of which controls the outward expansion movement of the pneumatic sliders. When the pneumatic sliders expand outwards, the support arms 321 are driven to move outwards to make the first rollers 322 abut against the inner wall of the core 4 to form radial positioning. When the pneumatic sliders retract inwards, the support arms 321 are driven to move to make the first rollers 322 disengage from the inner wall of the core 4. When the pneumatic chuck is used as the driving component 31, the expansion and retraction of the tensioning assembly 32 can be conveniently driven by the pneumatic chuck, which has a simple structure and is convenient to install.

[0051] In another example, as shown in Figure 5 and Figure 6 The driving component 31 comprises a driving shaft 311 and a driving member 312. The driving shaft 311 is used to drive the tensioning assembly 32 to operate. The driving shaft 311 can move along the axial direction of the core 4. The driving member 312 is used to drive the driving shaft 311 to move up and down along the vertical direction (the axial direction of the core 4).

[0052] Specifically, the end of the driving shaft 311 is provided with a first guide slope 3111. The end of the driving shaft 311 refers to the end towards the end of the support arm 321. When the driving shaft 311 moves downward, the first guide slope 3111 on the driving shaft 311 simultaneously abuts against the end of each support arm 321 arranged along the circumference thereof and pushes each support arm 321 outwardly to expand. When the driving shaft 311 slides to a first set position, the side wall of the driving shaft 311 abuts against the support arm 321. At this time, the plurality of support arms 321 are completely expanded, the first roller 322 on the outer end of the support arm 321 abuts against and limits the inner wall of the core 4, thereby achieving the radial positioning of the core 4. When the driving shaft 311 moves upwardly and the side wall of the driving shaft 311 is separated from the support arm 321, the support arm 321 loses the extrusion force and contracts inwardly to be separated from the inner wall of the core 4, thereby releasing the limitation of the core 4.

[0053] It should be understood that when the driving shaft 311 is used to drive the support arm 321 to expand outwardly, the tensioning assembly 32 further comprises a support seat, and the support arm 321 is slidingly assembled on the support seat to support the sliding of the support arm 321. It should be understood that when the support seat is used to support the support arm 321, the sliding direction of the support arm 321 is consistent with the sliding direction of the support arm 321 in the above example, which will not be described herein.

[0054] When the driving shaft 311 is used to drive the tensioning assembly 32, the tensioning assembly 32 further comprises an elastic reset member for driving the at least three support arms 321 to retract. For example, when the driving shaft 311 moves upwardly and is separated from the support arm 321, the support arm 321 is in a free state in the sliding direction. Therefore, the support arm 321 is driven by the elastic reset member to retract to the position, so that when the core 4 is jacked up by the supporting and positioning mechanism 2, the tensioning assembly 32 avoids the core 4 and can smoothly enter the inner cavity of the core 4.

[0055] As an example, the elastic reset member includes a first fixed block 324a arranged on either side of the support arm 321, and a baffle plate arranged correspondingly to the first fixed block 324a, wherein the first fixed block 324a is fixedly arranged relative to the support arm 321, and the baffle plate is fixedly arranged on the support arm 321. In order to achieve the rebound of the support arm 321 after the positioning is released, an elastic pin is arranged between the first fixed block 324a and the baffle plate, and the arrangement direction of the elastic pin is the same as the direction of the support arm 321. When the driving shaft 311 presses the support arm 321 downward, the elastic pin is forced to move away from the core 4 and store the force, and when the driving shaft 311 moves upward and away from the end of the support arm 321, the support arm 321 moves toward the core 4 under the elastic force of the elastic pin, thereby achieving the reset of the support arm 321.

[0056] As an optional embodiment, the end of each support arm 321 that cooperates with the end of the driving shaft 311 is provided with a second roller 327. Specifically, the other end (the end opposite to the outer end) of the support arm 321 is provided with the second roller 327, which is in abutment with the driving shaft 311 to push the support arm 321 to move outward. The driving shaft 311 rolls in contact with the second roller 327 when moving up and down, thereby reducing the running resistance of the driving shaft 311 and ensuring the smoothness of the operation of the device.

[0057] As an optional embodiment, the support frame 1 includes a main body structure, and a first through hole arranged on the main body structure and configured to cooperate with the core 4. The supporting and positioning mechanism 2 is coaxially arranged below the first through hole, and the diameter of the first through hole is greater than the outer diameter of the core 4, so that the core 4 can be located in the first through hole after being jacked up. When the tensioning assembly 32 is supported, the tensioning assembly 32 is arranged on the cross beam 323, so that the tensioning assembly 32 can be supported by the cross beam 323 to keep stable in the axial direction of the core 4.

[0058] When the tensioning assembly 32 is used, the tensioning assembly 32 needs to be coaxial with the core 4. When debugging the device or positioning the core 4 of different sizes, the position of the tensioning assembly 32 needs to be adjusted to make the tensioning assembly 32 coaxial with the core 4 and ensure the effect of radial positioning of the core 4. Therefore, in an implementable scheme, the cross beam 323 is slidably connected with the main body structure and can be locked at a second set position, and the tensioning assembly 32 is slidably connected with the cross beam 323 and can be locked at a third set position. The sliding direction of the cross beam 323 is along a first direction, the sliding direction of the tensioning assembly 32 is along a second direction, the first direction and the second direction are perpendicular to each other, and the first direction and the second direction are both perpendicular to the axial direction of the core 4. Therefore, the tensioning assembly 32 can be adjusted in a plane perpendicular to the axis of the core 4. The second set position and the third set position mentioned above refer to the positions when the tensioning assembly 32 is adjusted to be coaxial with the core 4.

[0059] As an example, the second fixed block 324b is arranged on both sides of the first through hole, the stop is arranged at the two ends of the cross beam 323 corresponding to the second fixed block 324b, the cross beam 323 is lapped on the second fixed block 324b through the stop, and the stop limits the movement of the cross beam 323 along the second direction, and simultaneously realizes the sliding connection between the cross beam 323 and the main body structure along the first direction. Meanwhile, the length direction of the second fixed block 324b is along the first direction, and the cross beam 323 can slide along the length direction of the second fixed block 324b, so as to realize the sliding fit between the cross beam 323 and the main body structure along the first direction. When the cross beam 323 is driven to slide along the first direction, the first fixed plate 325a is arranged on one side of the second fixed block 324b, the first adjusting bolt 326a is rotationally connected to the first fixed plate 325a, and the first adjusting bolt 326a is threadedly connected with the side surface of the cross beam 323. The cross beam 323 can be driven to move along the first direction by rotating the first adjusting bolt 326a.

[0060] As an example, when the cross beam 323 is locked, the threaded hole is arranged on the second fixed block 324b, the first waist-shaped hole 3231 corresponding to the threaded hole is arranged on the cross beam 323, and the bolt threadedly matched with the threaded hole is arranged in the first waist-shaped hole 3231. The length direction of the first waist-shaped hole 3231 is arranged along the first direction. When the cross beam 323 moves to the second set position along the first direction, the cross beam 323 is locked on the second fixed block 324b through the bolt.

[0061] As an example, a long hole 3232 is arranged in the middle of the cross beam 323 and is arranged in the same direction as the second direction, the tensioning assembly 32 is embedded and arranged in the long hole 3232, so as to realize the sliding connection between the tensioning assembly 32 and the cross beam 323 along the second direction. The second fixed plate 325b is arranged at one end in the length direction of the long hole 3232, the second adjusting bolt 326b is rotationally arranged on the second fixed plate 325b, and the second adjusting bolt 326b is threadedly connected with one side of the tensioning assembly 32. The tensioning assembly 32 can be driven to move along the second direction by rotating the second adjusting bolt 326b.

[0062] As an example, when the tensioning assembly 32 is locked, the threaded holes are arranged on both sides of the long hole 3232 of the cross beam 323, the second waist-shaped hole corresponding to the threaded hole is arranged on the tensioning assembly 32, and the length direction of the second waist-shaped hole is arranged along the second direction. When the tensioning assembly 32 moves to the third set position, the tensioning assembly 32 and the cross beam 323 are locked through the bolt.

[0063] As an example, the circumferential positioning mechanism 5 comprises a profiling key 511, a pushing cylinder and a sliding assembly 51. The profiling key 511 can move in the radial direction of the iron core 4. When the profiling key 511 is moved to be clamped with the positioning groove of the outer wall of the iron core 4, the circumferential positioning of the iron core 4 is realized through the clamping of the profiling key 511 and the positioning groove, so as to ensure that the paper insertion position is consistent with the paper groove position of the iron core 4. The movement of the profiling key 511 is realized through the cooperation of the pushing cylinder and the sliding assembly 51. Specifically, the profiling key 511 is arranged on one side of the sliding assembly 51 and faces the iron core 4. The sliding assembly 51 is slidingly connected with the support frame 1. The fixedly arranged pushing cylinder drives the sliding assembly 51 to move in the radial direction of the iron core 4 on the support frame 1, so as to realize the radial movement of the profiling key 511 along the iron core 4.

[0064] As an example, the sliding assembly 51 comprises a sliding plate 512 and a sliding block fixedly connected with the sliding plate 512. The support frame 1 is fixedly provided with a sliding rail in the radial direction of the iron core 4. The sliding connection between the sliding assembly 51 and the support frame 1 is realized through the cooperation of the sliding block and the sliding rail. The profiling key 511 is fixedly connected to the side of the sliding plate 512 close to the iron core 4. When the sliding plate 512 slides along the sliding rail, the profiling key 511 moves with the sliding plate 512.

[0065] As an optional embodiment, when the circumferential positioning mechanism 5 circumferentially positions the iron core 4, the profiling key 511 needs to be embedded into the positioning groove of the outer wall of the iron core 4. In order to prevent the iron core 4 from being tilted due to the clamping between the profiling key 511 and the edge of the positioning groove, the smoothness of the cooperation between the profiling key 511 and the positioning groove is ensured. A second guide slope is arranged on the profiling key 511, and the second guide slope cooperates with the positioning groove.

[0066] As an example, the second guide slope comprises slopes arranged at both ends of the profiling key 511 and an arc surface between the two slopes. The smoothness of the insertion of the profiling key 511 into the positioning groove is ensured through the cooperation between the arc surface and the positioning groove of the iron core 4. The slopes arranged on the upper and lower sides of the arc surface are used to reduce the cooperation length of the profiling key 511 and the positioning groove under the condition of ensuring the strength of the profiling key 511, so that the profiling key 511 is more easily inserted into the positioning groove.

[0067] As an optional embodiment, in order to prevent the iron core 4 from being tilted due to the excessive abutting between the profiling key 511 and the iron core 4 during the circumferential positioning process, a limiting block is arranged on the support frame 1, and a jacking bolt cooperating with the limiting block is arranged on the sliding assembly 51. During the sliding process of the sliding assembly 51 towards the iron core 4, the jacking bolt abuts against the limiting block to limit the running position of the sliding assembly 51.

[0068] In order to ensure good limiting effect, prevent the limiting failure caused by the length of the jackscrew or the installation error of the limiting block, the length of the jackscrew in the application is adjustable. As an example, a vertical plate is arranged on the sliding assembly 51 in the application, a circular hole for the jackscrew to pass through is arranged on the vertical plate, and a nut for screwing with the jackscrew is arranged on both sides of the circular hole. The jackscrew is locked on the vertical plate by the cooperation of the two nuts. In order to facilitate the description, the nut close to the core 4 side is referred to as the first nut, and the nut away from the core 4 side is referred to as the second nut. When adjusting the length of the jackscrew, if the length of the jackscrew is insufficient, the second nut is loosened, and the jackscrew is pushed to the appropriate length in the direction of the core 4, and then the first nut is adjusted to the locked state with the second nut. If the length of the jackscrew is too long, the first nut is loosened, and the jackscrew is pushed to the appropriate length away from the core 4, and then the second nut is adjusted to the locked state with the first nut.

[0069] When circumferential positioning is performed on different types of cores 4, the sliding assembly 51 needs to be replaced. In order to ensure that the replaced sliding assembly 51 can cooperate with the push cylinder smoothly, it is necessary to ensure the uniformity of the position of the sliding assembly 51 in the free state. In order to solve the above problems, an elastic element is sleeved on the jackscrew in the application, and the other end of the elastic element always abuts against the limiting block. When the sliding assembly 51 is in a free state, it is always in the same position under the action of the elastic force of the elastic element. When the sliding assembly 51 is working, the push cylinder applies force to the sliding assembly 51 to overcome the elastic force of the elastic element, so that the elastic element is retracted to be completely sleeved on the outside of the jackscrew, and the end of the jackscrew abuts against the limiting block, without affecting the circumferential positioning effect.

[0070] It should be noted that the sliding assembly 51 and the limiting block in the present scheme are installed on the same base component, for example, the sliding assembly 51 and the limiting block are installed on the same plate surface. When the sliding assembly 51 is replaced, the plate surface can be directly replaced.

[0071] As an example, the elastic member can be a spring. One end of the spring is fixedly sleeved on the outside of the jackscrew, and the other end always abuts against the surface of the limiting block. During the operation of the sliding assembly 51, the spring is gradually retracted to be completely sleeved on the outside of the jackscrew, and the end of the jackscrew abuts against the limiting block. When the sliding assembly 51 is in a free state, the sliding assembly 51 is pushed to a fixed position under the action of the elastic force of the spring.

[0072] In the application, in order to adapt to different types of cores 4, the radial positioning mechanism 3 and the sliding assembly 51 need to be replaced. In order to realize the quick replacement of the radial positioning mechanism 3 and the sliding assembly 51, a quick mounting plate 12 is specifically arranged in the embodiment, and the radial positioning mechanism 3 and the sliding assembly 51 are connected to the quick mounting plate 12 at the same time. When the quick mounting plate 12 is replaced, the radial positioning mechanism 3 and the sliding assembly 51 are replaced at the same time, which is simple and convenient to operate.

[0073] Meanwhile, in order to facilitate the disassembly and assembly of the quick mounting plate 12, a table plate 11 is arranged on the main body structure in the embodiment. As an example, the quick mounting plate 12 and the table plate 11 are quickly positioned by a set of diagonal positioning pins, and are quickly locked by a handle bolt arranged along another diagonal. The quick mounting plate 12 and the table plate 11 are quickly disassembled and assembled through the above structure, and the operation is convenient. Since the pin hole is prone to wear during a long disassembly and assembly process, the worn pin hole seriously affects the positioning accuracy. In order to solve this problem, a pin sleeve is embedded in the quick mounting plate 12, the pin sleeve is fixedly connected with the quick mounting plate 12 through a bolt, and the positioning pin is installed in the pin sleeve. The pin sleeve can be quickly replaced, and the cost is low.

[0074] As an example, when the cross beam 323 and the sliding assembly 51 are specifically arranged on the quick mounting plate 12, a first through hole for accommodating the radial positioning mechanism 3 is arranged on the table plate 11. Meanwhile, a second through hole 121 coaxial with the first through hole is arranged on the quick mounting plate 12. The diameter of the second through hole 121 is greater than the outer diameter of the iron core 4, so as to prevent the quick mounting plate 12 from interfering with the paper inserting operation.

[0075] In order to facilitate the adjustment of the position of the radial positioning mechanism 3, the cross beam 323 is arranged on the upper surface of the quick mounting plate 12 and crosses the second through hole 121. Specifically, the cross beam 323 is slidably connected with the quick mounting plate 12 in a first direction and can be locked at a second set position. For the connection and locking mode of the cross beam 323 and the quick mounting plate 12, reference can be made to the connection and locking mode of the cross beam 323 and the main body structure, which will not be described herein.

[0076] Since the positions and sizes of the positioning grooves on the outer walls of different models of iron cores 4 are different, when the different models of iron cores 4 are circumferentially positioned, the corresponding sliding assembly 51 and profiling key 511 need to be replaced, but the push cylinder can be universal. In order to reduce the replacement of parts, the push cylinder is fixedly connected to the table plate 11, the sliding assembly 51 is arranged on the quick mounting plate 12, and when the quick mounting plate 12 is replaced, the sliding assembly 51 is replaced synchronously, and the push cylinder does not need to be replaced.

[0077] As an example, in order to realize the quick connection between the sliding assembly 51 and the push cylinder when the quick mounting plate is replaced. A quick mounting groove is arranged on the piston rod of the cylinder, and a corresponding insert piece is arranged on the sliding assembly 51. When the quick mounting plate and the table plate are fixedly connected, the insert piece is inserted into the quick mounting groove. When the push cylinder operates, the insert piece is driven to move through the quick mounting groove, so as to drive the sliding assembly 51.

[0078] In addition, the elastic element is arranged between the jacks and the limiting blocks in the application, so that the sliding assembly on the quick mounting plate is always in the same position in the free state, and the quick mounting groove and the inserting piece can be smoothly matched when the quick mounting plate is replaced. The above is only a specific implementation of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A core positioning device, characterized by The application relates to a support frame, a supporting and positioning mechanism under the support frame and used for jacking up an iron core, a radial positioning mechanism, a circumferential positioning mechanism arranged on the support frame and used for clamping an external positioning groove of the iron core. The radial positioning mechanism comprises a tensioning assembly arranged above the support frame and used for abutting against the inner wall of the iron core, and a driving component used for driving the tensioning assembly to tension. The tensioning assembly comprises at least three supporting arms arranged along the circumference of the axis of the iron core and slidable along the radial direction of the iron core, wherein the outer end of each supporting arm is provided with a first roller used for abutting against the inner wall of the iron core. The driving component is a pneumatic chuck, the pneumatic slider at the bottom of the pneumatic chuck is connected with the supporting arms to drive the movement of the supporting arms.

2. The core positioning device of claim 1, wherein The driving component comprises a driving shaft movable along the axial direction of the iron core and a driving member used for driving the movement of the driving shaft.

3. The core positioning device of claim 2, wherein The end of the driving shaft is provided with a first guide inclined surface.

4. The core positioning device of claim 2, wherein When the driving shaft slides to a first set position, the side wall of the driving shaft abuts against the supporting arms, and the first roller of the supporting arms abuts against the inner wall of the iron core. The tensioning assembly further comprises an elastic reset member used for driving the retraction of the at least three supporting arms. The end of each supporting arm matched with the side wall of the driving shaft is provided with a second roller.

5. The core positioning device of claim 4, wherein The support frame comprises a main structure, a first through hole arranged on the main structure and used for matching with the iron core, and the diameter of the first through hole is larger than the outer diameter of the iron core.

6. The core positioning device of claim 4, wherein The support frame further comprises a cross beam arranged on the main structure.

7. The core positioning device according to any one of claims 2 to 6, characterized in that The cross beam is slidably connected with the main structure along a first direction and can be locked at a second set position. The tensioning assembly is slidably connected with the cross beam along a second direction and can be locked at a third set position. The first direction is perpendicular to the second direction. The circumferential positioning mechanism comprises a profiling key, a pushing air cylinder and a sliding assembly, wherein the profiling key is fixedly connected with the sliding assembly, the sliding assembly is slidably connected with the support frame along the radial direction of the iron core, and the pushing air cylinder drives the sliding assembly to slide along the radial direction of the iron core. The end of the profiling key matched with the positioning groove is provided with a second guide inclined surface.

8. The core positioning device of claim 7, wherein, The support frame is provided with a limiting block used for limiting the sliding assembly, the sliding assembly is provided with a jackscrew matched with the limiting block, and the jackscrew is a length-adjustable jackscrew. The jackscrew of the sliding assembly is sleeved with an elastic member, one end of the elastic member abuts against the jackscrew, and the other end abuts against the limiting block.

9. The core positioning device of claim 8, wherein, The main structure is provided with a table panel and a quick-mounting panel detachably connected with the table panel, the first through hole is arranged on the table panel, the quick-mounting panel is provided with a second through hole, the diameter of the second through hole is larger than the outer diameter of the iron core, the cross beam spans the second through hole, and the cross beam is slidably connected with the quick-mounting panel along the first direction and can be locked at the second set position.

10. The core positioning device of claim 8, wherein, The sliding assembly is slidably connected with the quick-mounting panel, the pushing air cylinder is arranged on the table panel, and the pushing air cylinder drives the sliding assembly to slide along the radial direction of the iron core.

11. The core positioning device of claim 10, wherein, ​ 12. The core positioning device of claim 11, wherein, ​ ​ 13. The core positioning device of claim 12, wherein, ​ The piston rod of the push cylinder is provided with a quick mounting groove; the sliding assembly is fixedly provided with an insertion piece; when the quick mounting plate is fixedly connected with the table top plate, the insertion piece is located in the quick mounting groove.

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