Coil end bending clamp

Abstract

The utility model discloses a coil end bending clamp, and relates to the technical field of motor manufacturing. Comprising a first press side plate and a second press side plate; the first protection layer is laid on the first press machine side plate and used for protecting the coil; the rubber rod is propped against the coil bending part; the fixed plate is connected with the end part of the rubber rod, and the fixed plate is arranged on the first press side plate; the epoxy resin plate is laid on the second press machine side plate and used for providing a bending gradient; and the second protection layer is laid on the epoxy resin plate and is used for protecting the coil. The clamp can bend a linear coil without influencing the coil inserting process, the position of the rubber rod is adjusted according to the size of the coil, the turn-to-turn insulating layer of the coil is not damaged, and the clamp is convenient to disassemble. The clamp can adapt to coils of different sizes, frequent clamp replacement or complex adjustment is not needed, and the production cost is reduced due to the high adaptability; the clamp is simple in structure, the operation difficulty is lowered, and meanwhile the risk of human errors is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a coil end bending fixture. Background Art

[0002] As permanent magnet motor technology matures, its applications are becoming more and more extensive. The voltage level, rated power, and rated torque requirements of permanent magnet motors are also getting higher and higher. However, due to limited space, the motor size cannot be too large. Therefore, in the design and development process of permanent magnet motors, the electromagnetic scheme is very important. The motor slot fill rate is a key factor in determining the motor power and torque. The electromagnetic scheme design is often a theoretical calculation value, but a series of problems will arise in actual production. The higher the motor slot fill rate, the more difficult the production process.

[0003] The coil of the concentrated winding is higher than the inner diameter of the stator core at R, which makes the motor production more difficult. The strong knocking during the wire embedding process may damage the coil insulation layer, which will greatly shorten the life of the permanent magnet motor. In addition, the insulation layer between the coil turns is damaged, causing discharge between adjacent coil turns of the permanent magnet motor under high voltage, motor short circuit, and even major accidents.

[0004] The existing coil end bending tooling has a relatively complex structure and requires operators to undergo special training to use it correctly. The complex operating steps may increase the risk of errors and reduce production efficiency. The high-cost tooling increases the manufacturing cost of the entire product. Utility Model Content

[0005] The utility model aims to provide a coil end bending fixture which is installed on a conventional flat push press to achieve automatic bending of the coil end, thereby improving production efficiency and reducing labor costs.

[0006] To achieve the above-mentioned purpose, the present application provides a coil end bending fixture, comprising a first press side plate and a second press side plate; and

[0007] A first protective layer, laid on the side plate of the first press machine, for protecting the coil;

[0008] The rubber rod is placed against the bend of the coil;

[0009] A fixing plate connected to the end of the rubber rod, the fixing plate being mounted on the side plate of the first press;

[0010] Epoxy resin sheet, laid on the side plate of the second press, used to provide bending slope;

[0011] The second protective layer, laid on the epoxy resin board, is used to protect the coil.

[0012] Furthermore, the first protective layer is a first adhesive felt, which is adhered to the first press side plate; the second protective layer is a second adhesive felt, which is adhered to the epoxy resin board.

[0013] Furthermore, a slope is provided at the bending end of the epoxy resin plate, and the slope is located at the starting end of the coil bending portion.

[0014] Furthermore, the thickness of the epoxy resin plate is the same as the height difference of the coil bending portion.

[0015] Furthermore, the installation position of the rubber rod is adjusted left and right according to the length of the coil bending portion.

[0016] Furthermore, during bending, the first press side plate slowly translates forward to make the side surface of the coil fit with the second protective layer, and continues to translate the first press side plate forward until the end of the coil bending portion contacts the second press side plate.

[0017] Furthermore, the end of the rubber rod is mounted on the lower part of the fixing plate by means of a cross recessed countersunk self-tapping screw.

[0018] Furthermore, the lower middle portion of the fixing plate is mounted on the first press side plate by bolts.

[0019] As a further step, the height of the fixing plate is greater than the sum of the thickness of the rubber rod and the thickness of the first press side plate.

[0020] As a further step, the epoxy resin plate is adhered to the second press side plate.

[0021] Compared with the prior art, the above technical solution adopted by the utility model has the following advantages: after the concentrated winding coil is wound, the coil end will be higher than the inner diameter of the stator core, so that the slot fill rate can be improved; the clamp can bend the straight coil without affecting the wire embedding process; the rubber rod adjusts its position according to the length of the coil size, does not damage the insulation layer between the coil turns, and is easy to disassemble.

[0022] The fixture can adapt to coils of different sizes, without frequent fixture replacement or complex adjustments. This high adaptability reduces production costs; the fixture has a simple structure, which reduces the difficulty of operation and the risk of human error. The fixture is integrated on a conventional flat-push press to achieve automatic bending of the coil end, improve production efficiency and reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a top view of the coil end bending fixture when it is not bent;

[0024] Figure 2 This is a top view of the coil end when the bending fixture is bending;

[0025] Figure 3 This is the schematic diagram of the rubber rod installation structure;

[0026] Wherein: 1. first press machine side plate, 2. second protective layer, 3. epoxy resin plate, 4. fixing plate, 5. rubber rod, 6. coil bending part, 7. second press machine side plate, 8. bolt, 9. cross recessed countersunk self-tapping screw. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0030] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Please refer to 1- Figure 3 , this embodiment provides a coil end bending fixture, including a first press side plate and a second press side plate; and

[0033] The first protective layer may be a first adhesive felt, which is attached to the side plate of the first press machine and is used to protect the coil;

[0034] The rubber rod is against the coil bending part; the installation position of the rubber rod is adjusted left and right according to the length of the coil bending part to adapt to the bending of coils of different lengths;

[0035] A fixing plate connected to the end of the rubber rod, the fixing plate being mounted on the side plate of the first press;

[0036] An epoxy resin plate is attached to the side plate of the second press to provide a bending slope;

[0037] The second protective layer may be a second adhesive-backed felt, which is adhered to the epoxy resin board and is used to protect the coil.

[0038] In this embodiment, a slope is provided at the bent end of the epoxy resin plate, and the slope is located at the starting end of the coil bending portion; the thickness of the epoxy resin plate is the same as the height difference of the coil bending portion.

[0039] As a preferred implementation scheme provided in this embodiment, the end of the rubber rod is installed on the lower part of the fixed plate by a cross-slot countersunk self-tapping screw; the middle part of the lower part of the fixed plate is installed on the side plate of the first press by bolts.

[0040] Use a conventional push press as a working platform, place the coil to be bent flat between the first press side plate and the second press side plate, place the rubber rod 5 against the coil bending part, start the push press, slowly move the first press side plate forward to make the coil side face fit with the second protective layer, continue to move the first press side plate forward until the end of the coil bending part contacts with the second press side plate, release the pressure after pausing for 3 seconds, and reset the first press side plate 1. At this time, the coil bending operation is completed. Then remove the first protective layer, the second protective layer 2, the epoxy resin plate 3, the fixing plate 4, and the rubber rod 5, and then resume normal use of the conventional push press, which is convenient to operate.

[0041] The effect of this embodiment is that after the coil is bent, the wire is embedded in the stator core slot, the position of the insulation wrapped at the outlet end is not higher than the inner diameter of the core, the slot fill rate can be appropriately improved, materials are saved, the manufacturing cost is reduced, and the size of the motor can be appropriately reduced. This coil end bending fixture is easy to use, easy to make, and easy to disassemble and install.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A coil end bending fixture, comprising a first press side plate and a second press side plate; characterized in that: Also includes: A first protective layer, laid on the side plate of the first press machine, for protecting the coil; The rubber rod is placed against the bend of the coil; A fixing plate connected to the end of the rubber rod, the fixing plate being mounted on the side plate of the first press; Epoxy resin sheet, laid on the side plate of the second press, used to provide bending slope; The second protective layer, laid on the epoxy resin board, is used to protect the coil.

2. A coil end bending fixture according to claim 1, characterized in that: The first protective layer is a first adhesive felt, which is attached to the first press side plate; the second protective layer is a second adhesive felt, which is attached to the epoxy resin plate.

3. The coil end bending fixture according to claim 1, characterized in that: The bending end of the epoxy resin plate is provided with a slope, and the slope is located at the starting end of the coil bending part.

4. The coil end bending fixture according to claim 1, characterized in that: The thickness of the epoxy resin plate is the same as the height difference of the coil bending portion.

5. The coil end bending fixture according to claim 1, characterized in that: The installation position of the rubber rod is adjusted left and right according to the length of the coil bending portion.

6. The coil end bending fixture according to claim 1, characterized in that: During bending, the first press side plate slowly translates forward to make the side surface of the coil fit with the second protective layer, and continues to translate the first press side plate forward until the end of the coil bending portion contacts the second press side plate.

7. The coil end bending fixture according to claim 1, characterized in that: The end of the rubber rod is mounted on the lower part of the fixing plate through a cross recessed countersunk self-tapping screw.

8. The coil end bending fixture according to claim 1, characterized in that: The lower middle portion of the fixing plate is mounted on the first press side plate by bolts.

9. The coil end bending fixture according to claim 1, characterized in that: The height of the fixing plate is greater than the sum of the thickness of the rubber rod and the thickness of the first press side plate.

10. The coil end bending fixture according to claim 1, characterized in that: The epoxy resin plate is adhered to the second press side plate.

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