Bending die
By designing the slidingly connected flexure head, main body and rolling structure in the bending mold, the problems of wire insulation patent leather damage and low bending efficiency are solved, and insulation protection and efficient bending are achieved.
Patent Information
- Application Number
- CN202422388233.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-29
AI Technical Summary
Existing bending molds are prone to damage the insulating patent skin on the surface of the wire when bending the wire, resulting in unstable motor stator performance, and reducing bending rate affects working efficiency, and relying on coating materials to pose a risk of contamination.
The bending mold design is adopted. The bend head and the bend body are slidingly connected, and the sliding direction is an outer tangent direction. Combined with the rolling structure and reset components, it reduces sliding friction, ensures that the insulating patent skin is not damaged, and ensures sliding reliability through the slider and slide rail structure.
Effectively reduce the sliding friction between the wire and the bend, protect the insulating patent leather, avoid contamination of the motor stator, improve bending efficiency, and do not rely on coating materials to ensure the protective effect of the wire.
Smart Images
Figure CN223145844U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor stators, in particular to a bending die. Background Art
[0002] During the winding (coiling) process of the stator of a disc motor, a bending die is required to bend the wire. That is, when the straight and continuously conveyed wire passes through the bending die, the wire will be bent by the bending die in one direction (for example, the left direction in the figure) into the required angle, and the length of the wire conveyed to the bending die is controlled before each bending to obtain a coil of a specific shape.
[0003] However, when the bending die performs a bending operation on the wire, generally a large bending pressing force is applied to the inner side and the outer side of the wire. Especially on the outer side of the wire in contact with the bending die, a large sliding friction is generated between the outer side of the wire and the bending die, which is extremely likely to damage the insulating paint film on the surface of the wire. And the insulating paint film on the surface of the wire is crucial for the electrical performance of the winding. Therefore, any slight wear of the insulating paint film on the wire may lead to the insulation failure of the wire, thereby causing a short circuit of the winding or instability of the use performance of the motor stator.
[0004] Since lubricants cannot be used on the wire (enameled copper wire), it will cause the subsequent dipping process unable to form a uniform paint film on the surface of the coil. Therefore, to solve the above problems, usually the bending speed of the bending die on the wire is reduced, or a wear-resistant and smooth material is coated on the surface of the bending head die in contact with the outer side of the wire, thereby reducing the sliding friction generated between the outer side of the wire and the bending die during bending, so as to reduce the damage to the insulating paint film on the surface of the wire.
[0005] However, the above methods have limited improvement effects on the damage to the insulating paint film on the surface of the wire, and the coated material is very likely to cause pollution of the motor stator and affect the use performance of the motor stator. And reducing the bending speed of the bending die on the wire will affect the bending work efficiency of the wire, and it depends on the characteristics of the coated material, and the coated material will also be worn and affect the protection effect on the wire. Summary of the Utility Model
[0006] The purpose of the utility model is to provide a bending die, which can reduce the sliding friction between the wire and the bending head, so as to ensure a better improvement effect on the damage to the insulating paint film on the surface of the wire.
[0007] To achieve the above object, the utility model adopts the following technical solutions:
[0008] A bending die, comprising a bending seat and a bending component rotatably arranged on the bending seat around the Z axis. The bending component includes:
[0009] The bending main body is rotatably mounted on the bending seat around the Z-axis;
[0010] The bending head is slidably connected to the bending main body. The bending head is used for rotatably contacting and bending the wire. The sliding direction of the bending head relative to the bending main body is the outer tangent direction of the wire bending.
[0011] As an alternative, one of the bending head and the bending main body is provided with a slider, and the other is provided with a slide rail. The slide rail extends along the outer tangent direction of the wire bending, and the slider can slide on the slide rail.
[0012] As an alternative, the bending assembly further includes:
[0013] The support seat extends along the Z-axis. The support seat is connected to the bending main body and is disposed opposite to the bending head. The support seat is used for abutting and supporting the bending head.
[0014] As an alternative, a rolling structure is connected between the bending head and the support seat so that the bending head and the support seat are in rolling contact.
[0015] As an alternative, the rolling structure includes a plurality of needle rollers. Each of the needle rollers is rotatably disposed on a side of the bending head facing the support seat. When the bending head slides along the sliding direction, the needle rollers are in rolling contact with the support seat.
[0016] As an alternative, the friction force between the needle roller and the support seat is less than the friction force between the bending head and the outer side surface of the wire.
[0017] As an alternative, the bending die further includes:
[0018] The reset assembly is connected between the bending main body and the bending head. The reset assembly can drive the bending head to reset.
[0019] As an alternative, the reset assembly includes:
[0020] The connecting plate, one end of which is connected to the bending head;
[0021] The guide rod, the length of which extends along the outer tangent direction of the wire bending. One end of the guide rod is connected to the other end of the connecting plate, and the other end of the guide rod is slidably inserted into the bending main body;
[0022] The elastic member is sleeved on a portion of the guide rod outside the bending main body. The elastic member is limited between the connecting plate and the bending main body.
[0023] As an alternative, the bending die further includes:
[0024] An inlet main body, which is installed on the bending seat. The bending head is located at the outlet end of the inlet main body, and an inlet channel for conveying the wire to the bending head is formed in the inlet main body.
[0025] As an alternative, a first edge pressing portion extends outwards on the bending head, and the upper surface of the wire in its thickness direction is limited and abutted against the first edge pressing portion. The thickness direction of the wire is parallel to the Z-axis.
[0026] The beneficial effects of the present utility model are as follows:
[0027] By rotatably installing the bending main body around the Z-axis on the bending seat and slidably connecting the bending head to the bending main body, the outer side surface of the wire can be rotatably contacted by the bending head, so that the bending head can bend the wire into a required angle; since the bending head that is in direct contact with the wire during the bending process is slidably connected to the bending main body, and the sliding direction of the bending head relative to the bending main body is the outer tangent direction of the wire bending; when bending the wire, the bending head will slide along the sliding direction while pressing against the wire, so that there is no relative sliding friction between the bending head and the outer side surface of the wire, but rolling contact, thereby greatly reducing the sliding friction between the wire and the bending head, being able to ensure a better improvement effect on the damage of the insulating paint film on the surface of the wire, and being able to avoid the problem of affecting the service performance of the motor stator due to the pollution of the motor stator, and being able to ensure the bending working efficiency of the wire, and no longer relying on the characteristics of the coating material, being able to ensure a better protection effect on the wire.
[0028] By providing a slider and a slide rail structure, the sliding reliability of the bending head on the bending main body can be ensured, and it can be ensured that the bending head always abuts against the outer side surface of the wire during the bending process, thereby ensuring the bending effect of the bending head on the wire.
[0029] By connecting a rolling structure between the bending head and the support seat, the bending head and the support seat are in rolling abutment, so that the friction force between the bending head and the support seat can be reduced, so as to ensure that the bending head can slide relative to the bending main body during bending, and avoid the problem that the bending head cannot slide due to the friction force between the bending head and the support seat being greater than the friction force between the outer side surface of the wire and the bending head.
[0030] Driven by the elastic force of the elastic member, the connecting plate and the bending head are moved back to their positions, so that the bending head can automatically return to its position, making the reset operation of the bending head simple and convenient.
[0031] By providing a guide rod, a guiding effect can be provided for the sliding of the bending head on the bending main body, so that the movement guiding property and reliability of the bending head in the sliding direction and during automatic return can be better ensured. Brief Description of the Drawings
[0032] Figure 1 is a schematic structure diagram of the bending die provided by the present utility model (before the bending head rotates). Figure 1 ;
[0033] Figure 2 is a schematic structure diagram of the bending die provided by the present utility model (after the bending head rotates). Figure 2 ;
[0034] Figure 3 is a schematic structure diagram of the bending die provided by the present utility model (after the bending head rotates). Figure 3 .
[0035] Description of the Reference Numerals:
[0036] 1 - Bending base
[0037] 2 - Bending assembly; 21 - Bending main body; 211 - Open cylindrical head; 22 - Bending head; 221 - First edge pressing; 23 - Support base; 24 - Rolling structure
[0038] 3 - Reset assembly; 31 - Connecting plate; 32 - Guide rod
[0039] 4 - Inlet wire main body; 41 - Second edge pressing Detailed Embodiment
[0040] All the features disclosed in this specification, or all the steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.
[0041] Any feature disclosed in this specification, unless specifically stated, can be replaced by other equivalent or features with similar purposes. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.
[0042] To make the technical problems solved by the present utility model, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific embodiments.
[0043] Currently, during the bending process of wire, the bending head is mainly responsible for applying force to the wire on the outer side of the wire, causing the wire to rotate around the Z-axis. Taking the Z-axis as the center, in the radial direction, since the positions of the wire and the bending head are different, when the bending head rotates around the Z-axis, relative sliding will occur between the bending head and the outer side of the wire, that is, sliding friction is generated. The generated sliding friction is the main reason for the damage of the insulating paint film on the surface of the wire.
[0044] To this end, in this embodiment, a bending die is proposed, which is used to bend a wire into a required angle, and can avoid damage to the insulating paint on the surface of the wire during the bending process, ensure the integrity of the wire surface, so that the insulation of the wire is better, thereby avoiding problems such as short circuit in the winding on the motor stator or instability of the performance of the motor stator, and further ensuring that the performance and working reliability of the motor stator are relatively high. The wire in this embodiment is specifically a wire with a square cross-section.
[0045] Specifically, as Figures 1 to 3 shown, the bending die includes a bending seat 1 and a bending component 2 rotatably arranged on the bending seat 1 around the Z-axis. The bending component 2 includes a bending main body 21 and a bending head 22; wherein, the bending main body 21 is rotatably installed on the bending seat 1 around the Z-axis; the bending head 22 is slidably connected to the bending main body 21, and the bending head 22 is used to rotate and contact and bend the wire, and the sliding direction of the bending head 22 relative to the bending main body 21 is the outer tangent direction of the wire bending.
[0046] By rotatably installing the bending main body 21 on the bending seat 1 around the Z-axis and slidably connecting the bending head 22 to the bending main body 21, the outer side of the wire can be rotated and contacted by the bending head 22, so that the bending head 22 can bend the wire into a required angle.
[0047] Compared with the prior art, the bending die in this embodiment sets the bending head 22 as an independent structure and slidably connects the bending head 22 to the bending main body 21; by making the bending head 22 in direct contact with the wire during the bending process be slidably connected to the bending main body 21, and making the sliding direction of the bending head 22 relative to the bending main body 21 be the outer tangent direction of the wire bending; when bending the wire, the bending head 22 will slide along the sliding direction while pressing the wire, so that there is no longer relative sliding friction between the bending head 22 and the outer side of the wire, but rolling contact, thereby greatly reducing the sliding friction between the wire and the bending head 22, being able to ensure a good improvement effect on the damage to the insulating paint on the wire surface, and being able to avoid problems such as affecting the performance of the motor stator due to contamination of the motor stator, and being able to ensure the bending work efficiency of the wire, and no longer relying on the characteristics of the coating material, and being able to ensure a good protection effect on the wire.
[0048] Further, a slider is provided on one of the bending head 22 and the bending main body 21, and a slide rail is provided on the other. The slide rail extends along the outer tangent direction of the wire bending, and the slider can slide on the slide rail to ensure the linear sliding of the bending head 22 on the bending main body 21. Among them, the slide rail can be provided on the bending main body 21 and the slider can be provided on the bending head 22, or the slider can be provided on the bending main body 21 and the slide rail can be provided on the bending head 22, and no specific limitation is made here.
[0049] It should be noted that regardless of the bending angle of the wire, the bending head 22 for restraining the outer side of the wire only needs to be able to provide a restraining function. Therefore, when the bending head 22 rotates, it needs to always maintain an outer side that is tangent to the tangent of the arc-shaped wire during the bending process; correspondingly, while taking into account the sliding function between the bending head 22 and the bending main body 21, it is necessary to ensure a relatively high reliability of the sliding connection between the bending head 22 and the bending main body 21. Therefore, the above-mentioned slider and slide rail structure is adopted to ensure the sliding reliability of the bending head 22 on the bending main body 21 through the slider and slide rail structure, and to ensure that the bending head 22 always abuts against the outer side of the wire during the bending process.
[0050] Furthermore, as Figures 1 to 3 shown, the bending assembly 2 further includes a support seat 23. The support seat 23 extends along the Z axis. The support seat 23 is fixedly connected to the bending main body 21 and is arranged opposite to the bending head 22. The support seat 23 is used to abut and support the bending head 22 to ensure the guiding property and stability of the bending head 22 during the sliding process.
[0051] During the bending process, the sliding of the bending head 22 on the bending main body 21 depends on the friction force between the wire and the bending head 22 when the wire is bent. Therefore, there is a problem that the bending head 22 cannot slide due to the friction force between the bending head 22 and the support seat 23 being greater than the friction force between the outer side of the wire and the bending head 22.
[0052] For this reason, as Figure 1 and Figure 3 shown, a rolling structure 24 is connected between the bending head 22 and the support seat 23, so that the bending head 22 and the support seat 23 are in rolling abutment, thereby being able to reduce the friction force between the bending head 22 and the support seat 23 to ensure that the bending head 22 can slide relative to the bending main body 21 during bending.
[0053] Specifically, as Figure 1 and Figure 3 shown, the rolling structure 24 includes a plurality of needle rollers. Each needle roller is rotatably arranged on the side of the bending head 22 facing the support seat 23; when the bending head 22 slides along the sliding direction, each needle roller is in rolling abutment with the support seat 23 to achieve the rolling abutment between the bending head 22 and the support seat 23.
[0054] Furthermore, the friction force between the needle roller and the support seat 23 is less than the friction force between the bending head 22 and the outer side of the wire to ensure that the bending head 22 can slide relative to the bending main body 21 during bending. That is, during bending, the bending head 22 can slide on the bending main body 21 under the friction force between the wire and the bending head 22.
[0055] Specifically, asFigures 1 to 3 As shown in the figure, the bending die further includes a reset assembly 3. The reset assembly 3 is connected between the bending body 21 and the bending head 22. The reset assembly 3 can drive the bending head 22 to automatically reset, so as to facilitate the next bending operation of the bending head 22.
[0056] Specifically, as Figures 1 to 3 shown, the reset assembly 3 includes a connecting plate 31, a guide rod 32 and an elastic member (not shown in the figure); wherein, one end of the connecting plate 31 is fixedly connected to one end of the bending head 22; the length of the guide rod 32 extends along the outer tangent direction of the wire bending, one end of the guide rod 32 is fixedly connected to the other end of the connecting plate 31, and the other end of the guide rod 32 is slidably inserted into the bending body 21; the elastic member is sleeved on the part of the guide rod 32 outside the bending body 21, and the elastic member is limited and connected between the connecting plate 31 and the bending body 21. In this embodiment, the elastic member can specifically be a spring.
[0057] It should be noted that the sliding direction of the bending head 22 relative to the bending body 21, the outer tangent direction of the wire bending and the length direction of the guide rod 32 are parallel to each other.
[0058] Specifically, when the bending head 22 slides linearly along the sliding direction, the bending head 22 drives the connecting plate 31 and the guide rod 32 to move along the sliding direction, so as to stretch the elastic member through the connecting plate 31; after the bending is completed, at this time, the bending head 22 is no longer in contact with the wire, so that the bending head 22 will not continue to slide on the bending body 21, so that the elastic force of the elastic member can drive the connecting plate 31 and the bending head 22 to automatically move back to the original position, so that the bending head 22 can automatically return to the original position, making the reset operation of the bending head 22 simple and convenient.
[0059] Moreover, by setting the guide rod 32, it can provide a guiding function for the sliding of the bending head 22 on the bending body 21, so as to better ensure the movement guiding property and reliability of the bending head 22 when sliding and automatically returning to the original position.
[0060] Furthermore, as Figures 1 to 3 shown, the bending die further includes an incoming wire main body 4. The incoming wire main body 4 is installed on the bending seat 1. The bending head 22 is located at the outgoing wire end of the incoming wire main body 4. An incoming wire channel for conveying the wire to the bending head 22 is formed in the incoming wire main body 4, so that the bending head 22 can bend the wire. Among them, the size and shape of the incoming wire channel match the size and shape of the wire; here, the structure of the incoming wire main body 4 is not limited, as long as it can support and convey the wire.
[0061] Specifically, as Figures 1 to 3As shown, a first crimping edge 221 extends from the folding elbow 22. The upper surface of the wire is limited and abutted against the first crimping edge 221 in its thickness direction, so as to be able to provide constraints to the upper surface of the wire. Among them, the thickness direction of the wire is parallel to the Z-axis.
[0062] Furthermore, as Figures 1 to 3 shown, a second crimping edge 41 is provided on the wire inlet main body 4. The second crimping edge 41 and the first crimping edge 221 are on the same horizontal plane. The upper surface of the wire is limited and abutted against the second crimping edge 41 in its thickness direction. That is to say, the first crimping edge 221 and the second crimping edge 41 jointly provide constraints to the upper surface of the wire to ensure the position stability of the wire during transportation and bending.
[0063] Specifically, as Figure 2 shown, an open-end cylindrical head 211 is further provided on the bending main body 21. The open-end cylindrical head 211 can rotate relative to the wire inlet main body 4 around the Z-axis. That is to say, the open-end cylindrical head 211 can rotate around the Z-axis as a whole with the bending main body 21 and the folding elbow 22, so that the folding elbow 22 bends the wire; that is, the wire is limited between the open-end cylindrical head 211 and the folding elbow 22. That is to say, the wire is bent between the open-end cylindrical head 211 and the folding elbow 22.
[0064] The specific working process of the bending die in this embodiment is as follows:
[0065] First, drive the bending main body 21 to rotate around the Z-axis to drive the folding elbow 22 to rotate around the Z-axis, so that the folding elbow 22 presses against the outer side of the wire for bending. At the same time, under the frictional force between the wire and the folding elbow 22 during wire bending, the folding elbow 22 slides on the bending main body 21 along the sliding direction, so that the folding elbow 22 and the wire are in rolling contact.
[0066] At the same time, each rolling needle on the folding elbow 22 rolls and contacts the support seat 23, so that the folding elbow 22 and the support seat 23 are in rolling contact to reduce the friction between the folding elbow 22 and the support seat 23; and the folding elbow 22 drives the connecting plate 31 and the guide rod 32 to move along the sliding direction to stretch the elastic member.
[0067] Then, after the bending is completed, at this time, the folding elbow 22 and the wire are no longer in contact, so that the folding elbow 22 will not continue to slide on the bending main body 21. The elastic force of the elastic member drives the connecting plate 31 and the folding elbow 22 to move back to their original positions, so that the bending plate automatically resets.
[0068] In the bending die of this embodiment, by setting the bending head 22 as an independent structure and slidingly connecting the bending head 22 to the bending main body 21, relative sliding friction between the bending head 22 and the outer side surface of the wire is no longer generated, but rolling contact occurs, greatly reducing the sliding friction between the wire and the bending head 22, and ensuring a better improvement effect on the damage to the insulating paint film on the surface of the wire.
[0069] In the bending die of this embodiment, through the slider and slide rail structure, the sliding reliability of the bending head 22 on the bending main body 21 can be ensured, and at the same time, it can be ensured that the bending head 22 always abuts against the outer side surface of the wire during the bending process, ensuring the bending effect.
[0070] In the bending die of this embodiment, by rotatably arranging a plurality of needle rollers on the side of the bending head 22 facing the support seat 23, when the bending head 22 slides along the sliding direction, each needle roller is in rolling abutment with the support seat 23, and the frictional force between the needle roller and the support seat 23 is less than the frictional force between the bending head 22 and the outer side surface of the wire, so as to ensure that the bending head 22 can slide relative to the bending main body 21 during bending.
[0071] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.
Claims
1. Bending die, characterized in that, It includes a bending seat (1) and a bending component (2) rotatably arranged about the Z-axis on the bending seat (1). The bending component (2) includes: A bending main body (21) rotatably mounted about the Z-axis on the bending seat (1); A bending head (22) slidably connected to the bending main body (21). The bending head (22) is used to rotatably contact and bend the wire. The sliding direction of the bending head (22) relative to the bending main body (21) is the outer tangent direction of the wire bending.
2. The bending die according to claim 1, wherein One of the bending head (22) and the bending main body (21) is provided with a slider, and the other is provided with a slide rail. The slide rail extends along the outer tangent direction of the wire bending, and the slider can slide on the slide rail.
3. The bending die according to claim 1, wherein The bending component (2) further includes: A support seat (23) extending along the Z-axis. The support seat (23) is connected to the bending main body (21) and is arranged opposite to the bending head (22). The support seat (23) is used to abut and support the bending head (22).
4. The bending die according to claim 3, wherein, A rolling structure (24) is connected between the bending head (22) and the support seat (23) to enable rolling contact between the bending head (22) and the support seat (23).
5. The bending die according to claim 4, characterized in that, The rolling structure (24) includes a plurality of needle rollers. Each of the needle rollers is rotatably arranged on one side of the bending head (22) facing the support seat (23). When the bending head (22) slides along the sliding direction, the needle rollers are in rolling contact with the support seat (23).
6. The bending die according to claim 5, wherein The frictional force between the needle rollers and the support seat (23) is less than the frictional force between the bending head (22) and the outer side surface of the wire.
7. The bending die according to any one of claims 1-6, characterized in that, The bending die further includes: A reset component (3) connected between the bending main body (21) and the bending head (22). The reset component (3) can drive the bending head (22) to reset.
8. The bending die according to claim 7, characterized in that, The reset component (3) includes: A connecting plate (31) with one end connected to the bending head (22); A guide rod (32). The length of the guide rod (32) extends along the outer tangent direction of the wire bending. One end of the guide rod (32) is connected to the other end of the connecting plate (31), and the other end of the guide rod (32) is slidably inserted into the bending main body (21); An elastic member sleeved on the part of the guide rod (32) outside the bending main body (21). The elastic member is limited between the connecting plate (31) and the bending main body (21).
9. The bending die according to any one of claims 1-6, characterized in that, The bending die further includes: An incoming wire main body (4) installed on the bending seat (1). The bending head (22) is located at the outgoing wire end of the incoming wire main body (4). An incoming wire channel for conveying the wire to the bending head (22) is formed in the incoming wire main body (4).
10. The bending die according to any one of claims 1-6, characterized in that, A first pressing edge (221) extends outwards on the bending head (22). The upper surface of the wire in its thickness direction is limited and abutted against the first pressing edge (221). The thickness direction of the wire is parallel to the Z-axis.