Tool for positioning a thread end

Abstract

This invention discloses a tool for positioning wire ends, comprising: a spring fixing plate having a plurality of first through holes extending vertically in a circumferential direction, each first through hole having a blind hole recessed horizontally inward on its inner wall; an elastic unit, the lower end of which abuts against the upper end of the spring fixing plate; a lower pressure plate having a plurality of second through holes corresponding to the positions of the first through holes; a gripper unit, each gripper unit including a first body and a second body extending into the first and second through holes; and an upper pressure plate located at the upper ends of the first and second positioning parts, the upper pressure plate being movable in a vertical direction. This invention can ensure the alignment effect between the wire end and the connecting copper sheet, resulting in more stable stator quality after welding. Furthermore, multiple gripper units can be controlled simultaneously to position multiple wire ends, thereby improving alignment efficiency and thus welding efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of positioning tools, in particular to a tool for positioning wire heads. BACKGROUND

[0002] In the motor production process, in order to simplify the difficulty of winding, usually there are more wire heads, for example, in this example, a stator has as many as 24 wire heads that need to be welded. When welding, the wire heads need to be aligned with the center of the connecting copper sheet. In the prior art, the single wire head needs to be aligned one by one and then welded, which has the problem of low welding efficiency. In addition, due to the small size of the stator and the thin wire head, the alignment effect is poor, which further causes the quality of the welded stator to be unstable. SUMMARY

[0003] In order to overcome the defects in the prior art, the embodiments of the present application provide a tool for positioning wire heads, which is used to solve one or more of the above problems.

[0004] The embodiments of the present application disclose a tool for positioning wire heads, which comprises: a spring fixing plate extending in the horizontal direction, a plurality of first through holes extending in the vertical direction are arranged around the circumference of the spring fixing plate, and the inner wall of each first through hole has a blind hole recessed in the horizontal direction towards the inside; an elastic unit arranged at the upper end of the spring fixing plate, the lower end of the elastic unit abuts against the upper end of the spring fixing plate; a lower pressing plate arranged at the upper end of the elastic unit, the lower end of the lower pressing plate abuts against the upper end of the elastic unit, the lower pressing plate has a plurality of second through holes corresponding to the positions of the first through holes, and the second through holes extend in the vertical direction; a clamping jaw unit, each clamping jaw unit comprises a first body and a second body extending into the first through hole and the second through hole, the lower ends of the first body and the second body are located below the spring fixing plate, the first body and the second body are connected to a rotating shaft part extending in the horizontal direction and extending into the blind hole, the first body and the second body respectively have a first positioning part and a second positioning part capable of being placed on the upper end of the lower pressing plate, and the first body and the second body above the rotating shaft part have a tendency to approach each other under the action of no external force; an upper pressing plate located at the upper end of the first positioning part and the second positioning part, the upper pressing plate can move in the vertical direction; during the pressing process of the upper pressing plate, the upper pressing plate abuts against the upper end of the first positioning part and the second positioning part, and the first positioning part and the second positioning part are away from each other, so that the lower ends of the first body and the second body are close to each other.

[0005] Further, the first body comprises a first clamping jaw part connected with the first positioning part, the second body comprises a second clamping jaw part connected with the second positioning part, the first clamping jaw part and the second clamping jaw part are arranged in the first through hole and the second through hole; the first positioning part comprises a first connecting part connected with the upper end of the first clamping jaw part and a first circular adjusting part located at one end of the first connecting part away from the first clamping jaw part; the second positioning part comprises a second connecting part connected with the upper end of the second clamping jaw part and a second circular adjusting part located at one end of the second connecting part away from the second clamping jaw part; the diameter of the first circular adjusting part is greater than the thickness of the first connecting part in the vertical direction, and the diameter of the second circular adjusting part is greater than the thickness of the second connecting part in the vertical direction.

[0006] Further, the lower ends of the first clamping jaw part and the second clamping jaw part are located on the same horizontal plane, and the diameters of the first circular adjusting part and the second circular adjusting part are the same.

[0007] Further, a positioning pin extending in the vertical direction is arranged in the spring fixing plate, the lower pressing plate and the upper pressing plate.

[0008] Further, the elastic unit comprises a compression spring extending in the vertical direction, and a plurality of the elastic units are arranged on the spring fixing plate in the circumferential direction of the spring fixing plate.

[0009] Further, a height limiting unit extending in the horizontal direction is arranged between each of the rotating shaft parts and the lower end of the clamping jaw unit, and the height limiting unit moves synchronously with the clamping jaw unit in the vertical direction.

[0010] Further, 24 first through holes are arranged at equal intervals in the circumferential direction of the spring fixing plate, 24 second through holes are arranged at equal intervals in the circumferential direction of the lower pressing plate, and 24 clamping jaw units respectively extend into different first through holes and second through holes.

[0011] The beneficial effects of the present application are as follows:

[0012] Through the relative positions between the upper pressing plate and the lower pressing plate, the clamping jaw unit can realize the effect of positioning the center of the wire head at the center of the connecting copper sheet, so as to ensure the alignment effect of the wire head and the connecting copper sheet, and make the quality of the stator after welding more stable. In addition, a plurality of clamping jaw units can be controlled to simultaneously position a plurality of wire heads, thereby improving the alignment efficiency and further improving the welding efficiency.

[0013] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Fig. 1 This is a schematic diagram of the stator structure in an embodiment of the present invention;

[0016] Fig. 2 This is a schematic diagram showing the detailed structure of the stator in an embodiment of the present invention;

[0017] Fig. 3 This is a schematic diagram of the tool used for locating the wire end in an embodiment of the present invention;

[0018] Fig. 4 This is a schematic diagram of the gripper unit in an embodiment of the present invention;

[0019] The reference numerals in the above figures are as follows: 1. Stator; 11. Wire end; 12. Connecting copper sheet; 2. Spring fixing plate; 3. Elastic unit; 4. Lower pressure plate; 5. Gripper unit; 51. First body; 511. First positioning part; 5111. First connecting part; 5112. First circular adjustment part; 512. First gripper part; 52. Second body; 521. Second positioning part; 5211. Second connecting part; 5212. Second circular adjustment part; 522. Second gripper part; 53. Rotating shaft part; 6. Upper pressure plate; 7. Positioning pin. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figs. 1 to 4 As shown, a tool for locating wire ends according to this application includes:

[0022] A spring fixing plate 2 extends horizontally and has multiple first through holes extending vertically around its circumference. This allows the multiple first through holes to be arranged around the spring fixing plate 2, with the center line of each first through hole forming a circle centered on the center of the spring fixing plate 2. This enables multiple gripper units 5 to be simultaneously arranged circumferentially. Each first through hole has a blind hole recessed horizontally into its inner wall. In this embodiment, the cross-sectional shape of the blind hole is circular, allowing the rotating shaft 53 on the gripper unit 5 to rotate after being inserted. This allows for fine adjustment of the relative position of the gripper unit 5 and the spring fixing plate 2, resulting in more uniform force distribution.

[0023] The elastic unit 3 is disposed at the upper end of the spring fixing plate 2, and the lower end of the elastic unit 3 abuts against the upper end of the spring fixing plate 2.

[0024] A lower pressure plate 4 is disposed at the upper end of the elastic unit 3, with its lower end abutting against the upper end of the elastic unit 3. This allows the elastic unit 3 to act as a buffer during the relative movement of the lower pressure plate 4 and the spring fixing plate 2. Furthermore, when no downward external force is applied to the lower pressure plate 4, the elastic unit 3 can push the lower pressure plate 4 upwards, thereby resetting it. The lower pressure plate 4 has multiple second through holes corresponding to the positions of the first through holes, and these second through holes extend vertically.

[0025] Each gripper unit 5 includes a first body 51 and a second body 52 extending into the first through hole and the second through hole. The lower ends of the first body 51 and the second body 52 are located below the spring fixing plate 2. The first body 51 and the second body 52 are connected to a rotating shaft portion 53 that extends horizontally and extends into the blind hole. The first body 51 and the second body 52 respectively have a first positioning portion 511 and a second positioning portion 521 that can be placed on the upper end of the lower pressure plate 4. The first body 51 and the second body 52 located above the rotating shaft portion 53 tend to move closer to each other when no external force is applied.

[0026] Upper pressure plate 6, which is located at the upper end of the first positioning part 511 and the second positioning part 521, and the upper pressure plate 6 can move in the vertical direction;

[0027] In this embodiment, the stator 1 is disposed at the lower end of the spring fixing plate 2, such that the lower ends of the first body 51 and the second body 52 correspond to the two sides of each wire end 11, and the lower ends of the first body 51 and the second body 52 are symmetrical about the vertical axis of symmetry relative to the connecting copper sheet 12 of the stator 1. 24 first through holes are evenly spaced in the circumferential direction of the spring fixing plate 2, and 24 second through holes are evenly spaced in the circumferential direction of the lower pressure plate 4. 24 gripper units 5 extend into different first and second through holes respectively.

[0028] In the initial state, when the upper pressure plate 6 is located above and isolated from the gripper unit 5, the elastic unit 3 pushes the lower pressure plate 4 upward. In this state, the gripper unit 5 does not have any external force acting from top to bottom, so that the first body 51 and the second body 52 located above the rotating shaft 53 abut against each other, and thus the lower ends of the first body 51 and the second body 52 are located on both sides of each wire end 11 and do not contact the wire end 11.

[0029] In the positioning state, the upper pressure plate 6 moves downward. During the downward pressing process, the upper pressure plate 6 abuts against the upper ends of the first positioning part 511 and the second positioning part 521, causing the first positioning part 511 and the second positioning part 521 to move away from each other, thereby causing the lower ends of the first body 51 and the second body 52 to move closer to each other. This allows the lower ends of the first positioning part 511 and the second positioning part 521 to limit the wire end 11 from both sides to the vertical axis of symmetry of the connecting copper sheet 12, thereby achieving the effect of positioning the center of the wire end 11 at the center of the connecting copper sheet 12. In this state, the wire end 11 is welded to the connecting copper sheet 12 to form the stator 1 product.

[0030] Through the aforementioned structure, the relative positions of the upper pressure plate 6 and the lower pressure plate 4 enable the gripper unit 5 to position the center of the wire end 11 relative to the center of the connecting copper sheet 12, thereby ensuring the alignment of the wire end 11 with the connecting copper sheet 12 and resulting in more stable quality of the stator 1 after welding. Furthermore, multiple gripper units 5 can be controlled simultaneously to position multiple wire ends 11, thereby improving alignment efficiency and ultimately welding efficiency.

[0031] Specifically, the first body 51 includes a first gripper portion 512 connected to the first positioning portion 511, and the second body 52 includes a second gripper portion 522 connected to the second positioning portion 521. The first gripper portion 512 and the second gripper portion 522 pass through the first through hole and the second through hole. The first positioning portion 511 includes a first connecting portion 5111 connected to the upper end of the first gripper portion 512 and a first circular adjusting portion 5112 located at the end of the first connecting portion 5111 away from the first gripper portion 512. The second positioning portion 521 includes a second connecting portion 5211 connected to the upper end of the second gripper portion 522 and a second circular adjusting portion 5212 located at the end of the second connecting portion 5211 away from the second gripper portion 522. The first circular adjustment portion 5112 and the second circular adjustment portion 5212 have arcs running from top to bottom, allowing the contact point between the upper pressure plate 6 and the first and second circular adjustment portions 5112 to change, thus making the change between the initial state and the positioning state smoother. The diameter of the first circular adjustment portion 5112 is greater than the thickness of the first connecting portion 5111 in the vertical direction, and the diameter of the second circular adjustment portion 5212 is greater than the thickness of the second connecting portion 5211 in the vertical direction. This avoids the first and second connecting portions 5111 and the second connecting portion 5211 from contacting the upper pressure plate 6, thereby preventing interference between the first and second connecting portions 5111 and the upper pressure plate 6 and improving the stability of the entire tool.

[0032] Specifically, the lower ends of the first gripper portion 512 and the second gripper portion 522 are located on the same horizontal plane, and the diameters of the first circular adjustment portion 5112 and the second circular adjustment portion 5212 are the same. This ensures that the contact points of the first gripper portion 512 and the second gripper portion 522 with the thread end 11 are on the same horizontal plane, thereby improving the thread end 11 handling effect.

[0033] Specifically, it includes a locating pin 7 extending vertically, which passes through the spring fixing plate 2, the lower pressure plate 4, and the upper pressure plate 6. This provides guidance for the relative movement of the spring fixing plate 2, the lower pressure plate 4, and the upper pressure plate 6 in the vertical direction, and prevents relative movement of the spring fixing plate 2, the lower pressure plate 4, and the upper pressure plate 6 in the horizontal direction, thereby improving the stability of the entire tool.

[0034] Specifically, the elastic unit 3 includes a compression spring extending in the vertical direction, and a plurality of the elastic units 3 are arranged in a ring around the spring fixing plate 2 along the circumference of the spring fixing plate 2. This allows the reset and buffering forces from the elastic units 3 to be distributed throughout the circumference of the spring fixing plate 2, thereby making the transition between the initial state and the positioning state more stable.

[0035] Specifically, a height limiting unit extending horizontally is provided between the lower end of each of the rotating shafts 53 and the gripper unit 5, and the height limiting unit moves synchronously with the gripper unit 5 in the vertical direction. This allows the height limiting unit to move synchronously as the gripper unit 5 moves up and down with the lower pressure plate 4, enabling the height of the wire ends 11 to be controlled by adjusting the downward stroke of the gripper unit 5. Furthermore, it allows for the simultaneous adjustment of all wire ends 11 to the same height.

[0036] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A tool for locating wire ends, characterized in that, include: A spring fixing plate extends horizontally and has a plurality of first through holes extending vertically around its circumference. The inner wall of each first through hole has a blind hole recessed horizontally inward therein. An elastic unit is disposed at the upper end of the spring fixing plate, and the lower end of the elastic unit abuts against the upper end of the spring fixing plate. A lower pressure plate is disposed at the upper end of the elastic unit, and the lower end of the lower pressure plate abuts against the upper end of the elastic unit. The lower pressure plate has a plurality of second through holes corresponding to the positions of the first through holes, and the second through holes extend in the vertical direction. Each gripper unit includes a first body and a second body extending into the first through hole and the second through hole. The lower ends of the first body and the second body are located below the spring fixing plate. The first body and the second body are connected to a rotating shaft that extends horizontally and into the blind hole. The first body and the second body respectively have a first positioning part and a second positioning part that can be placed on the upper end of the lower pressure plate. The first body and the second body located above the rotating shaft tend to move closer to each other when no external force is applied. An upper pressure plate is located at the upper end of the first positioning part and the second positioning part, and the upper pressure plate can move in the vertical direction; During the pressing down process of the upper pressure plate, the upper pressure plate abuts against the upper ends of the first positioning part and the second positioning part, causing the first positioning part and the second positioning part to move away from each other, thereby causing the lower ends of the first body and the second body to move closer to each other.

2. The tool for locating wire ends according to claim 1, characterized in that, The first body includes a first gripper portion connected to the first positioning portion, and the second body includes a second gripper portion connected to the second positioning portion. The first gripper portion and the second gripper portion pass through the first through hole and the second through hole. The first positioning part includes a first connecting part connected to the upper end of the first gripper part and a first circular adjusting part located at the end of the first connecting part away from the first gripper part; The second positioning part includes a second connecting part connected to the upper end of the second gripper part and a second circular adjusting part located at one end of the second connecting part away from the second gripper part; The diameter of the first circular adjustment part is greater than the thickness of the first connecting part in the vertical direction, and the diameter of the second circular adjustment part is greater than the thickness of the second connecting part in the vertical direction.

3. The tool for locating wire ends according to claim 2, characterized in that, The lower ends of the first gripper portion and the second gripper portion are located on the same horizontal plane, and the diameters of the first circular adjustment portion and the second circular adjustment portion are the same.

4. The tool for locating wire ends according to claim 1, characterized in that, It includes a positioning pin extending in the vertical direction, which passes through the spring fixing plate, the lower pressure plate and the upper pressure plate.

5. The tool for locating wire ends according to claim 1, characterized in that, The elastic element includes a compression spring extending in a vertical direction, and a plurality of the elastic elements are arranged circumferentially on the spring fixing plate.

6. The tool for locating wire ends according to claim 1, characterized in that, A height limiting unit extending horizontally is provided between the lower end of each of the rotating shafts and the gripper unit, and the height limiting unit moves synchronously with the gripper unit in the vertical direction.

7. The tool for locating wire ends according to claim 1, characterized in that, The 24 first through holes are equally spaced on the circumference of the spring fixing plate, and the 24 second through holes are equally spaced on the circumference of the lower pressure plate. The 24 gripper units extend into different first through holes and second through holes respectively.

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