Positioning tool and positioning method

Abstract

The invention belongs to the field of stator lamination positioning, and particularly relates to a positioning tool and a positioning method. The bearing module comprises a positioning column, a support, a through hole and a clamping block; one end of the positioning column is fixedly connected with the support; the through hole penetrates through the support and the positioning column along the central axis of the positioning column; the clamping block extends from one end of the positioning column to the other end of the positioning column along the outer surface of the positioning column, and the width of the clamping block is gradually increased in the length direction of the clamping block; and the locking module penetrates through the through hole and is detachably connected with the bearing module. Therefore, the problem of low positioning precision of the stator lamination in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the field of stator lamination positioning, and in particular relates to a positioning tool and a positioning method. Background Art

[0002] In the motor manufacturing industry, the welding of stator laminations is one of the core elements of building the motor stator structure. With the continuous improvement of motor performance requirements, the requirements for welding quality are becoming increasingly stringent. Most of the existing stator lamination welding is done by laser welding, and the position of the stator laminations needs to be fixed during the laser welding process. At present, there are a variety of tooling equipment for laser welding of stator laminations on the market, most of which use mechanical clamps or magnetic adsorption for positioning and clamping. Although these tooling equipment can achieve the positioning of the laminations to a certain extent, due to the influence of the surrounding environment, the anti-interference ability of the mechanical clamps or magnetic adsorption is not strong. Once the working voltage of the mechanical clamp or the magnetic field around the magnetic adsorption changes, the stator laminations may be displaced, resulting in low positioning accuracy. Summary of the invention

[0003] In order to solve the problem of low positioning accuracy of stator laminations in the prior art, the present invention provides a positioning tool and a positioning method:

[0004] In the first aspect, the present embodiment provides a positioning tool, including: a carrying module and a locking module, the carrying module including a positioning column, a support, a through hole, and a blocking block; one end of the positioning column is fixedly connected to the support; the through hole passes through the support and the positioning column along the central axis of the positioning column; the blocking block extends from one end of the positioning column along the outer surface of the positioning column to the other end of the positioning column, and the width of the blocking block gradually increases along its length direction; the locking module is detachably connected to the carrying module through the through hole.

[0005] In some embodiments, the locking module includes a screw, a baffle, and a nut; the baffle is fixedly connected to one end of the screw, the length of the baffle is greater than the diameter of the through hole, the diameter of the screw is smaller than the diameter of the through hole, and the length of the screw is greater than the length of the positioning column; the nut can be threadedly connected to the screw.

[0006] In some embodiments, the positioning column includes a bearing portion and a connecting portion, the outer diameter of the connecting portion is smaller than the outer diameter of the bearing portion; one end of the bearing portion is fixedly connected to the support; the other end is fixedly connected to one end of the connecting portion; the clamping block extends from one end of the bearing portion along the outer surface of the positioning column to the other end of the bearing portion, and the through hole passes through the bearing portion and the connecting portion;

[0007] The positioning tool also includes a clamping module, which includes a bearing part, a first barrier part, a second barrier part, and a third barrier part; the bearing part is a circular tubular body with both end faces passing through; the first barrier part, the second barrier part, and the third barrier part are tubular bodies arranged inside the bearing part and whose central axes are the same as the central axis of the bearing part, and the internal spaces of the first barrier part, the second barrier part, and the third barrier part are interconnected; the inner diameter of the first barrier part is larger than the diameter of the screw and smaller than the outer diameter of the connecting part; the inner diameter of the second barrier part is equal to the outer diameter of the first barrier part; the inner diameter of the third barrier part is equal to the outer diameter of the second barrier part.

[0008] In some embodiments, the included angle between the intersection line of the blocking block extending from one end of the bearing portion along the outer surface of the positioning column to the other end of the bearing portion and the bearing portion is β, and 0.5°≤β≤0.8°.

[0009] In some embodiments, an end face of the support away from the bearing portion is concave inwardly to form a groove, and the circumferential surface of the groove is provided with a first sawtooth shape; the outer circumferential surface of the baffle is provided with a second sawtooth shape, the baffle can be embedded in the groove, and the first sawtooth can engage with the second sawtooth.

[0010] In some embodiments, the first saw teeth are evenly arranged on the circumference of the groove; and the second saw teeth are evenly arranged on the circumference of the baffle.

[0011] In some embodiments, the groove and the baffle are both cylindrical, and the central axis of the groove is the same as the central axis of the bearing portion; the central axis of the baffle is the same as the central axis of the screw.

[0012] In some embodiments, the depth of the groove is greater than or equal to the thickness of the baffle.

[0013] In some embodiments, the screw includes a threaded section and a non-threaded section, the length of the non-threaded section is H1, the length of the threaded section is H2, and the range of H1:H2 is 1 to 1.5; the non-threaded section is close to the support.

[0014] In a second aspect, a positioning method is provided, which is applied to a positioning tool as described in the first aspect, comprising:

[0015] S11: Passing the locking module through the through hole;

[0016] S12: The locking module is detachably fixedly connected to the positioning column.

[0017] In order to solve the problem of low positioning accuracy of stator laminations in the prior art, the present invention has the following advantages:

[0018] The card block is designed to have a gradually increasing width along its length direction; and the width of one end of the card block away from the support is smaller than the width of the stator lamination slot; the width of one end of the card block close to the support is larger than the width of the stator lamination slot; when the stator lamination is positioned, the card block can be engaged with the slot, and after the locking module is detachably connected to the carrier module through the through hole, the stator lamination can be fixed on the positioning column, which solves the problem that the existing mechanical clamp or magnetic adsorption has weak anti-interference ability. Once the working voltage of the mechanical clamp or the magnetic field around the magnetic adsorption changes, the stator lamination may be displaced, resulting in low positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a positioning tool;

[0020] Figure 2 for Figure 1 Sectional view along the AA direction;

[0021] Figure 3 for Figure 1 Schematic diagram of the explosion structure;

[0022] Figure 4 Structural diagram of the compression module;

[0023] Figure 5 This is a schematic diagram of the structure of the positioning column in an embodiment of this tooling;

[0024] Figure 6 This is a schematic diagram of the structure of the screw in one embodiment of the tooling;

[0025] Figure 7 Schematic diagram of the position of the block on the stator column.

[0026] In the figure: 10, bearing module; 11, bearing part; 12, connecting part; 13, support; 14, through hole; 15, block; 20, locking module; 21, screw; 22, baffle; 23, nut; 30, clamping module; 31, bearing part; 32, first barrier part; 33, second barrier part; 34, third barrier part. DETAILED DESCRIPTION

[0027] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0028] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0029] This embodiment discloses a positioning tool, such as Figure 1 , Figure 2 , Figure 3 As shown, including:

[0030] The carrier module 10 and the locking module 20, the carrier module 10 includes a positioning column, a support 13, a through hole 14, and a block 15; one end of the positioning column is fixedly connected to the support 13; the through hole 14 passes through the support 13 and the positioning column along the central axis of the positioning column; the block 15 extends from one end of the positioning column along the outer surface of the positioning column to the other end of the positioning column, and the width of the block 15 gradually increases along its length direction; the locking module 20 passes through the through hole 14 and is detachably connected to the carrier module 10.

[0031] In this embodiment, the outer diameter of the positioning column is smaller than the inner diameter of the stator lamination, and a recessed groove is provided on the inner circumferential surface of the stator lamination; the width of the end of the block 15 away from the support 13 is smaller than the width of the groove; the width of the end of the block 15 close to the support 13 is greater than the width of the groove; the block 15 can be engaged with the groove; and the locking module 20 can fix the stator lamination on the positioning column. By designing the block 15 to gradually increase its width along its length direction; and the width of the end of the block 15 away from the support 13 is less than the width of the stator lamination slot; the width of the end of the block 15 close to the support 13 is greater than the width of the stator lamination slot; when positioning the stator lamination, the block 15 can be engaged with the slot, and after the locking module 20 passes through the perforation 14 and is detachably connected to the carrier module 10, the stator lamination can be fixed on the positioning column, which solves the problem that the existing mechanical clamp or magnetic adsorption has weak anti-interference ability, and once the working voltage of the mechanical clamp or the magnetic field around the magnetic adsorption changes, the stator lamination may be displaced, resulting in low positioning accuracy. In this embodiment, the number and position of the block 15 can be adjusted according to the number of slots of the stator lamination, so that the block 15 can be set with the slot, thereby locking the position of the slot, and avoiding the position movement of the stator lamination when the stator lamination is laser welded. In this embodiment, the height of the positioning column is preferably higher than the total height of the stator laminations, so that the clamping block 15 can fully contact with the clamping slot to lock the stator laminations.

[0032] In some embodiments, Figure 2 , Figure 3 As shown, the locking module 20 includes a screw 21, a baffle 22, and a nut 23; the baffle 22 is fixedly connected to one end of the screw 21, the length of the baffle 22 is greater than the diameter of the through hole 14, the diameter of the screw 21 is smaller than the diameter of the through hole 14, and the length of the screw 21 is greater than the length of the positioning column; the nut 23 can be threadedly connected to the screw 21.

[0033] In this embodiment, the locking module 20 includes a screw 21, a baffle 22, and a nut 23. After the screw 21 passes through the through hole 14, the baffle 22 can abut against the support 13. After the nut 23 is threadedly connected to the screw 21, the nut 23 can abut against the stator laminations to fix the stator laminations on the positioning column, which can prevent the stator laminations from moving along the central axis direction of the stator column, thereby improving the stability of the stator laminations during the welding process.

[0034] In some embodiments, Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the positioning column includes a bearing portion 3111 and a connecting portion 12, the outer diameter of the connecting portion 12 is smaller than the outer diameter of the bearing portion 3111; one end of the bearing portion 3111 is fixedly connected to the support 13; the other end is fixedly connected to one end of the connecting portion 12; the block 15 extends from one end of the bearing portion 3111 along the outer surface of the positioning column to the other end of the bearing portion 3111, and the through hole 14 passes through the bearing portion 3111 and the connecting portion 12;

[0035] The positioning tool also includes a clamping module, and the clamping module 30 includes a bearing part 3111, a first baffle part 32, a second baffle part 33, and a third baffle part 34; the bearing part 3111 is a circular tubular body with both end faces passing through; the first baffle part 32, the second baffle part 33, and the third baffle part 34 are tubular bodies arranged inside the bearing part 3111 and whose central axes are the same as the central axis of the bearing part 3111, and the internal spaces of the first baffle part 32, the second baffle part 33, and the third baffle part 34 are interconnected; the inner diameter of the first baffle part 32 is larger than the diameter of the screw 21 and smaller than the outer diameter of the connecting part 12; the inner diameter of the second baffle part 33 is equal to the outer diameter of the first baffle part 32; the inner diameter of the third baffle part 34 is equal to the outer diameter of the second baffle part 33.

[0036] In the present embodiment, in the present embodiment, the end of the block 15 can be accommodated in the internal cavity of the third partition portion 34, and by setting the positioning column as the bearing portion 3111 and the connecting portion 12, the stator lamination can be fixed on the bearing portion 3111, and by setting the clamping module 30, the first partition portion 32 in the clamping module 30 can abut against the end of the connecting portion 12, and the third partition portion 34 can abut against the upper end surface of the stator lamination, and by tightening the nut 23, the nut 23 applies pressure to the upper end surface of the first partition portion 32, so that the third partition portion 34 can apply pressure to the stator lamination, so that the friction between the stator lamination and the block 15 is increased, thereby fixing the position of the stator lamination.

[0037] In some embodiments, Figure 7 As shown, the angle between the intersection line of the block 15 extending from one end of the bearing portion 3111 along the outer surface of the positioning column to the other end of the bearing portion 3111 and the bearing portion 3111 is β, and 0.5°≤β≤0.8°.

[0038] In this embodiment, by setting the angle β between the intersection line extending from one end of the load-bearing portion 3111 along the outer surface of the positioning column to the other end of the load-bearing portion 3111 and the load-bearing portion 3111 to 0.5°~0.8°, the block 15 can be tilted at a certain angle, thereby increasing the friction between the block 15 and the slot when fixing the position of the stator laminations.

[0039] In some embodiments, Figure 5 , Figure 6 As shown, one end face of the support 13 away from the bearing portion 3111 is concave inwardly to form a groove, and the circumferential surface of the groove is provided with a first sawtooth; the outer circumferential surface of the baffle plate 22 is provided with a second sawtooth, the baffle plate 22 can be embedded in the groove, and the first sawtooth can engage with the second sawtooth.

[0040] In this embodiment, a first sawtooth shape is provided on the circumferential surface of the groove of the support 13, and a second sawtooth shape is provided on the outer circumferential surface of the baffle 22, so that the baffle 22 can be embedded in the groove, and the first sawtooth can mesh with the second sawtooth. In this way, it is possible to prevent the relative rotation of the screw rod 21 and the positioning column during the welding process of the stator laminations, thereby preventing the position of the stator laminations from moving, thereby making it difficult for the position of the stator laminations to move during welding, thereby improving the quality of welding.

[0041] In some embodiments, Figure 5 , Figure 6 As shown, the first saw teeth are evenly arranged on the circumference of the groove; and the second saw teeth are evenly arranged on the circumference of the baffle 22.

[0042] In this embodiment, a sawtooth circle is evenly arranged on the circumference of the groove; the second sawtooth is evenly arranged on the circumference of the baffle 22, so that after the first sawtooth and the second sawtooth are meshed, the baffle 22 is subjected to more uniform force, and the position of the screw 21 and the positioning column is less likely to be misaligned.

[0043] In some embodiments, Figure 5 , Figure 6 As shown, the groove and the baffle 22 are both cylindrical, and the central axis of the groove is the same as the central axis of the bearing portion 3111 ; the central axis of the baffle 22 is the same as the central axis of the screw rod 21 .

[0044] In this embodiment, by setting the groove and the baffle 22 to be cylindrical, when the baffle 22 is engaged with the groove, the baffle 22 can quickly engage with the groove, which facilitates the operation of engaging the first serration with the second serration, and can improve the installation efficiency of the screw 21 and the positioning column.

[0045] In some embodiments, the depth of the groove is greater than or equal to the thickness of the baffle 22 .

[0046] In this embodiment, by setting the depth of the groove to be greater than or equal to the thickness of the baffle 22, it is possible to ensure that the baffle 22 is completely accommodated in the groove, thereby avoiding the end of the baffle 22 being located outside the support 13, and preventing the position of the stator laminations from being changed due to the exposure of the baffle 22 and being hit when welding the stator laminations.

[0047] In some embodiments, Figure 6 As shown, the screw rod 21 includes a threaded section and a non-threaded section, the length of the non-threaded section is H1, the length of the threaded section is H2, and the range of H1:H2 is 1 to 1.5; the non-threaded section is close to the support 13.

[0048] In this embodiment, by setting the screw 21 as a threaded section and a non-threaded section, and the ratio of the length of the non-threaded section to the threaded section is 1 to 1.5, the length of the non-threaded section is greater than the length of the threaded section. In this way, only the screw 21 at the threaded connection with the nut 23 is provided with threads, while other parts are not provided with threads. The torsional strength of other parts can be enhanced, thereby increasing the overall torsional strength of the screw 21, making the screw 21 more durable.

[0049] This embodiment provides a positioning method, including the following steps:

[0050] S11: Pass the locking module 20 through the through hole 14;

[0051] S12: The locking module 20 is detachably fixedly connected to the positioning column.

[0052] In this embodiment, the stator lamination is fixed to the positioning column by engaging the card slot on the stator lamination with the card block 15 and using the locking module 20. By engaging the card block 15 with the card slot, after the locking module 20 passes through the through hole 14 and is detachably connected to the carrier module 10, the stator lamination can be fixed to the positioning column, which solves the problem that the existing mechanical clamp or magnetic adsorption has weak anti-interference ability. Once the working voltage of the mechanical clamp or the magnetic field around the magnetic adsorption changes, the stator lamination may be displaced, resulting in low positioning accuracy.

[0053] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present disclosure.

Claims

1. A positioning tool, characterized in that: include: A load-bearing module and a locking module, wherein the load-bearing module comprises a positioning column, a support, a perforation, and a clamping block; One end of the positioning column is fixedly connected to the support; The through hole passes through the support and the positioning column along the central axis of the positioning column; the blocking block extends from one end of the positioning column along the outer surface of the positioning column to the other end of the positioning column, and the width of the blocking block gradually increases along its length direction; the locking module passes through the through hole and is detachably connected to the supporting module.

2. A positioning tool according to claim 1, characterized in that: The locking module includes a screw, a baffle, and a nut; the baffle is fixedly connected to one end of the screw, the length of the baffle is greater than the diameter of the through hole, the diameter of the screw is smaller than the diameter of the through hole, and the length of the screw is greater than the length of the positioning column; the nut can be threadedly connected to the screw.

3. A positioning tool according to claim 2, characterized in that: The positioning column comprises a bearing portion and a connecting portion, wherein the outer diameter of the connecting portion is smaller than the outer diameter of the bearing portion; one end of the bearing portion is fixedly connected to the support; and the other end is fixedly connected to one end of the connecting portion; the clamping block extends from one end of the bearing portion along the outer surface of the positioning column to the other end of the bearing portion, and the through hole passes through the bearing portion and the connecting portion; The positioning tool also includes a clamping module, which includes a bearing part, a first barrier part, a second barrier part, and a third barrier part; the bearing part is a circular tubular body with both end faces passing through; the first barrier part, the second barrier part, and the third barrier part are tubular bodies arranged inside the bearing part and whose central axes are the same as the central axis of the bearing part, and the internal spaces of the first barrier part, the second barrier part, and the third barrier part are interconnected; the inner diameter of the first barrier part is larger than the diameter of the screw and smaller than the outer diameter of the connecting part; the inner diameter of the second barrier part is equal to the outer diameter of the first barrier part; the inner diameter of the third barrier part is equal to the outer diameter of the second barrier part.

4. A positioning tool according to claim 3, characterized in that: The included angle between the intersection line of the block extending from one end of the bearing part along the outer surface of the positioning column to the other end of the bearing part and the bearing part is β, and 0.5°≤β≤0.8°.

5. A positioning tool according to claim 4, characterized in that: The support has an end face away from the bearing portion which is concave inwardly to form a groove, and the circumferential surface of the groove is provided with a first sawtooth shape; the outer circumferential surface of the baffle is provided with a second sawtooth shape, the baffle can be embedded in the groove, and the first sawtooth can mesh with the second sawtooth.

6. A positioning tool according to claim 5, characterized in that: The first saw teeth are evenly arranged on the circumference of the groove; and the second saw teeth are evenly arranged on the circumference of the baffle.

7. A positioning tool according to claim 6, characterized in that: The groove and the baffle are both cylindrical, the center axis of the groove is the same as the center axis of the bearing portion; the center axis of the baffle is the same as the center axis of the screw.

8. A positioning tool according to claim 6, characterized in that: The depth of the groove is greater than or equal to the thickness of the baffle.

9. A positioning tool according to claim 8, characterized in that: The screw comprises a threaded section and a non-threaded section, the length of the non-threaded section is H1, the length of the threaded section is H2, and the range of H1:H2 is 1 to 1.5; the non-threaded section is close to the support.

10. A positioning method, the method being applied to a positioning tool as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S11: Passing the locking module through the through hole; S12: The locking module is detachably fixedly connected to the positioning column.

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