Tape reel structure for insulating wrapping of small-span coil

Abstract

The utility model provides a tape reel structure for insulating wrapping of a small-span coil, which comprises an angle block, a tape reel seat and a tape reel core, the angle block is fixed with a wrapping head, the tape reel seat is fixed with the angle block, and an insulating tape reel is mounted on the tape reel core; the tape reel core comprises a fixed part and a movable part; the fixed part sequentially penetrates through the movable part and the tape reel seat and then is fixed with the angle block; the movable part is movably connected with the fixed part, and the insulating tape reel is mounted on the movable part; one end, facing the tape reel seat, of the movable part is a contact end, and a friction plate is arranged between the contact end and the tape reel seat; and the contact end of the movable part and the friction plate generate friction through elastic force provided by the wave spring so as to provide tension required by insulation wrapping. Compared with the prior art, a tension adjusting structure is removed, the structures of the angle block, the tape reel base and the tape reel core are improved, the structure is simplified, the space structure is reduced under the condition that tension is reserved, the manufacturing cost is saved, and meanwhile insulation wrapping of a small-span coil is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation tape wrapping of motor coils, and more particularly to a tape reel structure used for insulation wrapping of small-span coils. Background Art

[0002] The motor winding composed of high-purity conductive metal coils is a key component of the motor. The insulation tape of the coil is generally completed by a tape wrapping machine. The tape wrapping machine is provided with a tape wrapping head, and the tape wrapping head is provided with a tape wrapping reel for installing the insulating tape reel. During the tape wrapping process, the insulating tape on the insulating tape reel gradually decreases, so that the diameter of the insulating tape reel gradually decreases, and the pulling force of the insulating tape reel on the insulating tape will also gradually decrease. During the tape wrapping process, constant tension must be maintained to ensure that the insulating tape is well wrapped on the motor coil and the manufacturing quality of the winding is guaranteed. Therefore, the existing technology often uses a tension control mechanism to ensure that the tension of the insulating tape is constant during the tape wrapping process. There are purely mechanical types, as well as mechanical structures combined with program control, which can achieve very good tension control effects. It should be noted that those skilled in the art know that constant tension is not a specific value, but a range of values.

[0003] There is a small span coil. The span of the coil is generally 80mm, which is very small. When wrapping the tape, the radius of the insulating tape reel varies from 9mm to 20mm, and the variation range is also small, so the tension variation range is also small.

[0004] The application number is 201621065572.9, and the patent name is "A horizontal taping machine with automatic adjustment of taping tension". It discloses a horizontal taping machine with automatic adjustment of taping tension, which includes: a taping disk, two symmetrically arranged pendulums, a first servo motor, a precision resistor, and a second servo motor. The first motor drives the taping disk to rotate through the main shaft, and the first servo motor gives force to the pendulum to drive the pendulum to move. The position signal of the pendulum is transmitted to the second servo motor through the precision resistor, wherein the position signal of the pendulum represents the real-time tension of the pendulum. The second servo motor adjusts the speed of the taping disk in real time through the position signal of the pendulum. Regardless of the speed of the tape during the wrapping process, the tape tension is always consistent, so that the shielding layer can be evenly wrapped around the outside of the wire.

[0005] A patent applied for by the applicant: the patent application number is 202210821388.6, the patent name is a constant tension control method for a tape wrapping disk and a tape wrapping disk with a constant tension control mechanism. It is equipped with a constant tension control mechanism, a friction wheel, a friction belt, an adjustment rod, a rocker arm, etc., all of which are used to achieve constant tension when wrapping tape.

[0006] The above two patents can both provide constant tension for the taping machine. For the small-span coils mentioned above, the radius variation range of the tape reel is small and the tension variation range is small during taping. The applicant is considering whether it is possible to provide a tape reel structure that can provide appropriate tension for the insulation taping of small-span coils. Utility Model Content

[0007] The utility model provides a tape reel structure for insulating and wrapping small-span coils based on the characteristics of small-span coils having a small range of variation in tape reel radius and a small range of variation in tension during tape wrapping, thereby simplifying the tape wrapping reel structure and saving manufacturing costs.

[0008] A tape reel structure for insulating and wrapping small-span coils, comprising an angle block, a tape reel seat and a tape reel core, wherein the angle block is fixed to a taping head, the tape reel seat is fixed to the angle block, and the insulating tape reel is mounted on the tape reel core; the tape reel core comprises a fixed part and a movable part, the fixed part passes through the movable part and the tape reel seat in sequence and is fixed to the angle block; the movable part is movably connected to the fixed part, and the insulating tape reel is mounted on the movable part; the end of the movable part facing the tape reel seat is a contact end, and a friction plate is provided between the contact end and the tape reel seat; a friction plate is provided at one end of the tape reel seat, and a locking structure for applying pressure to the tape reel seat along the axial direction is provided at the other opposite end; the movable part rotates as the tape reel rotates, and the pressure transmitted by the locking structure between the contact end of the movable part and the friction plate generates friction to provide the tension required for insulating wrapping.

[0009] Furthermore, the fixed part is fixed to the angle block by a screw, and the screw passes through the angle block and is connected to the fixed part; a washer is also provided in the angle block, and a spring is provided between the washer and the reel seat; the screw includes a head, and a hole matching the head is opened in the center of the washer. When the screw is tightened, the head presses the washer, and the spring is compressed between the washer and the reel seat.

[0010] Furthermore, one end of the reel seat is fixed to the angle block, and the other end is provided with an annular groove, the friction plate is mounted on the bottom of the annular groove, and the contact end of the movable part extends into the annular groove to contact the friction plate.

[0011] Furthermore, the movable part and the fixed part are movably connected via a bearing, the movable part is a hollow structure, and the bearing is located between the movable part and the fixed part.

[0012] Furthermore, it also includes a bearing seat cover, the bearing is installed on the bearing seat, and the movable part and the bearing seat cover are fixed as a whole; the bearing seat cover is located at one end of the fixed part, and the fixed part has an annular protrusion extending outward at one end close to the bearing seat cover, and the bearing seat cover is provided with an annular groove; the annular protrusion is clearance-fitted with the annular groove, and the annular protrusion is located between the bearing and the annular groove.

[0013] Furthermore, the bearing seat cover and the movable part are fixed into a whole by welding.

[0014] Furthermore, the bearing seat cover is located in the hollow structure of the movable part, and the upper surface of the bearing seat cover is flush with the upper surface of the movable part.

[0015] Furthermore, it also includes a reel cover assembly, which is fixedly connected to the fixed part through screws. The screws and the reel cover assembly become a whole through an elastic retaining ring and can be rotated independently to connect with the fixed part to quickly fix the insulating tape reel.

[0016] The present invention has the following beneficial effects compared to the prior art:

[0017] The present invention provides a reel structure for insulating small-span coils. Existing reel structures typically include an angle block, a reel seat, a reel core, and a tension adjustment mechanism. Compared to existing reel structures, this invention eliminates the tension adjustment mechanism and improves the structure of the angle block, reel seat, and reel core, making it suitable for insulating small-span coils. Specifically, the reel core comprises a fixed portion and a movable portion. The fixed portion passes through the movable portion, the reel seat, and then secures to the angle block. The movable portion is movably connected to the fixed portion, and the insulating tape reel is mounted on the movable portion. The end of the movable portion facing the reel seat is a contact end, with a friction plate disposed between the contact end and the reel seat. The movable portion rotates as the reel rotates, generating friction between the contact end and the friction plate. The friction torque generated solely by the contact end and the friction plate can meet the required tension for insulating small-span coils. Furthermore, a washer and a spring are provided in the angle block. By adjusting the elastic force exerted by the spring on the reel seat, the friction force between the contact end and the friction plate is adjusted, thereby varying the tension during wrapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the tape reel structure used for insulation wrapping of small span coils (sectional front view);

[0020] Figure 2 This is a schematic diagram of the tape reel structure used for insulation wrapping of small span coils (cross-sectional perspective view);

[0021] Figure 3 It is a schematic diagram of a three-dimensional tape reel structure used for insulation winding of small-span coils.

[0022] 1-angle block, 2-disc seat, 3-disc, 4-fixed part, 5-movable part, 6-friction plate, 7-screw, 8-washer, 9-spring, 10-head, 11-bearing, 12-bearing seat cover, 13-disc cover assembly. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims. Example

[0024] A tape-reel structure for insulating small-span coils, such as Figure 1 As shown, it includes an angle block 1, a reel seat 2, and a reel core. The angle block 1 is fixed to the tape wrapping head, the reel seat 2 is fixed to the angle block 1, and the insulating tape reel 3 is installed on the reel core. The reel core includes a fixed part 4 and a movable part 5. The fixed part 4 passes through the movable part 5 and the reel seat 2 in sequence and is fixed to the angle block 1. The movable part 5 is movably connected to the fixed part 4, and the insulating tape reel 3 is installed on the movable part 5. The end of the movable part 5 facing the reel seat 2 is the contact end, and a friction plate 6 is provided between the contact end and the reel seat 2. The friction plate 6 is provided at one end of the reel seat 2, and a locking structure is provided at the other end opposite to the reel seat 2 to apply pressure to the reel seat 2 along the axial direction. The movable part 5 rotates as the reel 3 rotates, and the pressure transmitted by the locking structure between the contact end of the movable part 5 and the friction plate 6 generates friction to provide the tension required for insulation wrapping. The axial direction described in this application is the rotation axis of the reel 3, which is also the central axis of the fixed part.

[0025] The present invention simplifies the tape reel structure of the small span coil. Since the tension variation range of the small span coil is small when winding, the present invention cleverly uses the friction plate 6, and sets the friction plate 6 between the movable part 5 and the tape reel seat 2. The tension is provided only by the torque generated by the friction force between the contact end of the movable part 5 and the friction plate 6. There is no need to set up a complex tension control structure to maintain constant tension during tape wrapping.

[0026] The locking structure includes a washer and a spring, such as Figure 2 As shown, the fixing part 4 is fixed to the angle block 1 by a screw 7, which passes through the angle block 1 and is connected to the fixing part 4. The washer 8 is set in the angle block 1, and the spring 9 is also set between the washer 8 and the reel seat 2; the screw 7 includes a head 10, and the center of the washer 8 has a hole that matches the head 10. When the screw 7 is tightened, the head 10 presses the washer 8, and the spring 9 is compressed between the washer 8 and the reel seat 2. Figure 2As shown, the washer 8 has a groove at one end, into which the spring 9 resides. When the spring 9 is relaxed, its height is greater than the depth of the groove. The other end of the washer 8 has a hole through which a screw 7 passes to connect with the fixed portion 4. In this embodiment, the head 10 of the screw 7 is frustoconical, and therefore the hole in the washer 8 is also frustoconical. When the screw 7 is tightened, the spring 9 is compressed, and the contact end of the movable portion 5 and the friction plate 6, exerting pressure from the spring, generate friction, providing the required tension for the insulation wrap. In this embodiment, the spring is a wave spring.

[0027] like Figure 2 As shown, one end of the reel seat 2 is fixed to the angle block 1, and the other end is provided with an annular groove. The friction plate 6 is installed at the bottom of the annular groove, and the contact end of the movable part 5 extends into the annular groove and contacts the friction plate 6. Figure 2 As can be seen from the figure, the contact end of the movable part 5 is actually an annular protrusion, which extends into the annular groove of the disc seat 2 and contacts the friction plate 6. Figure 2 As shown, for positioning purposes, the outer diameter of the movable portion 5 is larger than the outer diameter of the annular protrusion.

[0028] The fixed part 4 of the present application is the rotating shaft of the insulating tape reel 3 and the movable part 5. The movable part 5 and the fixed part 4 are movably connected through a bearing 11. The movable part 5 is a hollow structure, and the bearing 11 is located between the movable part 5 and the fixed part 4.

[0029] The bearing 11 is mounted on the bearing seat, and the movable portion 5 and the bearing seat cover 12 are welded together to form a single unit. The bearing seat cover 12 is located at one end of the fixed portion 4. The fixed portion 4 has an annular protrusion extending outward at the end near the bearing seat cover 12. The bearing seat cover 12 is provided with an annular groove; the annular protrusion has a clearance fit with the annular groove and is located between the bearing 11 and the annular groove.

[0030] In this application, the bearing 11 is installed in the bearing seat, and the bearing seat includes a bearing seat cover 12. The movable part 5 and the bearing seat cover 12 are welded into a whole, that is, connected to the bearing seat into a whole. The bearing seat is located between the movable part 5 and the fixed part 4, and the bearing seat cover 12 rotates with the movable part 5; the fixed part 4 is clamped between the bearing 11 and the bearing seat cover 12, so the movable part 5, the bearing seat, the bearing 11, and the fixed part 4 form a whole (a new type of reel core). During assembly, they are installed as a whole part. Figure 2 In the orientation shown, the annular protrusion is located in the annular groove and is located above the bearing 11. The bearing 11 has a limiting effect on the fixed part 4. When it is an integral part, the fixed part 4 will not fall out of the integral part. The fixed part 4 is clamped between the bearing 11 and the bearing seat cover 12.

[0031] The bearing seat cover 12 is located in the hollow structure of the movable part 5 , and the upper surface of the bearing seat cover 12 is flush with the upper surface of the movable part 5 .

[0032] It also includes a reel cover assembly 13, which is fixedly connected to the fixed part 4 by screws. The screws and the reel cover assembly 13 become a whole through an elastic retaining ring and can be rotated independently to be connected to the fixed part 4 to quickly fix the insulating tape reel 3.

[0033] During installation, the reel structure for insulating and wrapping small-span coils described in this application is first connected with the angle block 1 and the reel seat 2 using fasteners. The new reel core is then placed on the reel seat 2. Screws 7 are passed through washers 8 containing springs 9 and fastened to the fixed portion 4 of the new reel core. By adjusting the screwing depth of screws 7, the pressing force of the friction plate 6 between the reel seat 2 and the movable portion 5 is adjusted, thereby adjusting the friction torque and the tension of the reel 3. The reel 3 is placed on the movable portion 5, and the reel cover assembly 13 with fasteners is connected to the fixed portion 4. The tightening depth of the fasteners is adjusted according to the thickness of the reel 3.

[0034] The present application has a simple structure and is easy to adjust. It does not require the use of a complex tension adjustment structure. It only requires simple modifications to the angle block 1, the reel seat 2, and the reel core. This simplifies the structure, reduces the spatial structure while retaining the tension, saves manufacturing costs, and is more convenient for insulating and winding small-span coils.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the present invention.

Claims

1. A tape reel structure for insulating and wrapping a small-span coil, comprising an angle block, a tape reel seat, and a tape reel core, wherein the angle block is fixed to a taping head, the tape reel seat is fixed to the angle block, and the insulating tape reel is mounted on the tape reel core; characterized in that: The reel core includes a fixed part and a movable part, and the fixed part passes through the movable part, the reel seat and then is fixed to the angle block in sequence; the movable part is movably connected to the fixed part, and the insulating tape reel is installed on the movable part; the end of the movable part facing the reel seat is the contact end, and a friction plate is provided between the contact end and the reel seat; a friction plate is provided at one end of the reel seat, and a locking structure that applies pressure to the reel seat along the axial direction is provided at the other opposite end; the movable part rotates as the reel rotates, and the pressure transmitted by the locking structure between the contact end of the movable part and the friction plate generates friction to provide the tension required for insulation wrapping.

2. The tape reel structure for insulating and wrapping a small-span coil according to claim 1, characterized in that: The locking structure includes a washer and a spring; the fixed part is fixed to the angle block by a screw, and the screw passes through the angle block and is connected to the fixed part; the washer is arranged in the angle block, and the spring is arranged between the washer and the reel seat; the screw includes a head, and the center of the washer is provided with a hole adapted to the head. When the screw is tightened, the head presses the washer, and the spring is compressed between the washer and the reel seat. The contact end of the movable part and the friction plate generate friction through the elastic force provided by the spring to provide the tension required for the insulation wrapping.

3. The tape reel structure for insulating and wrapping a small-span coil according to claim 1, characterized in that: One end of the reel seat is fixed to the angle block, and the other end is provided with an annular groove. The friction plate is installed at the bottom of the annular groove, and the contact end of the movable part extends into the annular groove to contact the friction plate.

4. The tape reel structure for insulating and wrapping a small-span coil according to claim 1, characterized in that: The movable part and the fixed part are movably connected via a bearing. The movable part is a hollow structure, and the bearing is located between the movable part and the fixed part.

5. The tape reel structure for insulating and wrapping a small-span coil according to claim 4, characterized in that: It also includes a bearing seat cover, the bearing is installed on the bearing seat, and the movable part and the bearing seat cover are fixed as a whole; the bearing seat cover is located at one end of the fixed part, and the fixed part has an annular protrusion extending outward at one end close to the bearing seat cover, and the bearing seat cover is provided with an annular groove; the annular protrusion is clearance-fitted with the annular groove, and the annular protrusion is located between the bearing and the annular groove.

6. The tape reel structure for insulating and wrapping a small-span coil according to claim 5, characterized in that: The bearing seat cover and the movable part are fixed into a whole by welding.

7. The tape reel structure for insulating and wrapping a small-span coil according to claim 6, characterized in that: The bearing seat cover is located in the hollow structure of the movable part, and the upper surface of the bearing seat cover is flush with the upper surface of the movable part.

8. The tape reel structure for insulating and wrapping a small-span coil according to claim 5, characterized in that: It also includes a reel cover assembly, which is fixedly connected to the fixed part through screws. The screws and the reel cover assembly become a whole through an elastic retaining ring and can be rotated independently to connect with the fixed part to quickly fix the insulating tape reel.

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