heat fitting tooling

Abstract

This utility model discloses a heat-fitting fixture, comprising two fixing members and two hand-held parts. A fixing space for a stator winding is formed between the fixing members. Each fixing member has a contact part that closely fits the stator winding and provides clamping force. At least one connecting part between the two fixing members allows for mutual connection and fixation or disengagement. The two hand-held parts are respectively fixed to the two fixing members. This heat-fitting fixture enables safe and rapid manual assembly operations without relying on mechanical handling. It is convenient to operate, improves worker safety, saves time, and increases production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor equipment technology, specifically relating to a heat fitting tool for stator windings and stator housing. Background Technology

[0002] In existing medium and large-sized direct-drive (DD) motors, when heat-fitting the stator windings to the stator housing, the stator housing needs to be heated to a high temperature before being removed from the oven. Operators then need to place the heavy stator windings into the housing, which can easily lead to a loss of tension and prevent precise alignment. If the stator windings are not placed into the housing in time, the housing cools and shrinks, reducing its inner diameter and potentially preventing the windings from fitting. This necessitates reheating the housing, wasting significant time and increasing the risk of burns and damage to the operator's arm from the hot stator housing during a fall. This method of operation greatly increases the operator's workload during mass production, jeopardizes their safety, and severely reduces production efficiency.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a heat fitting tool to improve the safety and efficiency of manual assembly of stator windings and coils.

[0005] To achieve the above objectives, a specific embodiment of this utility model provides a heat fitting fixture, including two fixing members and two hand-held parts. A fixing space for a stator winding is formed between the fixing members. Each fixing member is provided with a contact part that is in close contact with the stator winding and provides clamping force. At least one connecting part is provided between the two fixing members, which can be connected and fixed or disengaged from each other. The two hand-held parts are respectively fixed to the two fixing members.

[0006] In one or more embodiments of this utility model, the fixing member is a semi-circular ring, the fixing space is formed between the two semi-circular rings, the contact portion is formed on the inner circle of the semi-circular ring, and the connecting portion is formed at the ends of the two semi-circular rings.

[0007] In one or more embodiments of this utility model, the two semicircular rings are independent of each other, and each end of each semicircular ring is provided with an adapter plate that can be fixed together.

[0008] In one or more embodiments of this utility model, one end of the two semicircular rings is pivotally connected, and the other end is provided with an adapter plate that can be fixed together.

[0009] In one or more embodiments of this utility model, the adapter plate and the semi-circular ring are detachably fixed.

[0010] In one or more embodiments of this utility model, the end of the semi-circular ring is provided with a groove for accommodating the adapter plate, and the depth of the groove in the circumferential direction is the same as the thickness of the adapter plate.

[0011] In one or more embodiments of this utility model, a portion of the hand-held portion protrudes radially inward along the semi-circular ring.

[0012] In one or more embodiments of the present invention, the handheld part includes a mounting block fixed to a fixing member and a handle fixed to the mounting block.

[0013] In one or more embodiments of this utility model, the mounting block and the fixing member are detachably fixed.

[0014] In one or more embodiments of this utility model, the handle and the mounting block are detachably fixed.

[0015] Compared with existing technologies, the heat fitting tooling of this utility model enables manual, safe and fast assembly operations without relying on mechanical handling. It is easy to operate, improves the safety of operators, saves time and improves production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the assembly of the stator housing and stator winding using a heat-shrink tooling in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a heat-shrinking tooling in one embodiment of the present invention;

[0019] Figure 3 This is a disassembly diagram of the heat fitting tooling in one embodiment of the present invention.

[0020] Explanation of key figure labels:

[0021] 100-Heat fitting tooling, 10-Fixed part, 11-Contact part, 12-Connecting part, 13-Adapter plate, 14-Slot, 20-Handheld part, 21-Mounting block, 22-Handle, 200-Stator winding, 300-Stator housing. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0023] During motor assembly, the stator windings and stator housing are interference-fitted. Typically, hot-fitting and cold-pressing processes are used to assemble the stator windings into the stator housing. Cold-pressing involves directly pressing the windings into the stator housing at room temperature using mechanical pressure. It results in a larger interference fit, requires no heating equipment, and has lower operator skill requirements, but forceful pressing can cause scratches. It is mainly used for small-volume motors. Hot-fitting, on the other hand, is based on the thermal expansion and contraction of metals. The stator housing is heated to expand, and then quickly fitted onto the stator windings. Once the stator housing cools and contracts, a tight interference fit secures the windings. Hot-fitting requires precise temperature and interference fit control (even more so for large motors) and avoids scratches, making it primarily used for medium to large-sized motors.

[0024] like Figure 1-3 As shown, the heat-shrinking fixture 100 in one embodiment of this utility model is mainly used for the manual, quick, and safe assembly of the stator winding 200 and the stator housing 300 without relying on mechanical handling equipment. It includes two fixing members 10 and two handheld parts 20. A fixing space for fixing the stator winding 200 is formed between the two fixing members 10. Each fixing member 10 is provided with a contact part 11 that closely fits the stator winding 200 and provides clamping force. At least one openable connecting part 12 is included between the two fixing members 10. The two handheld parts 20 are respectively fixed to the two fixing members 10 for the operator to hold.

[0025] The stator winding 200 of medium and large direct-drive motors is relatively heavy. After heating the stator housing 300 to the target temperature, the two connecting parts 12 are disengaged, and the contact part 11 is placed against the stator winding 200. Then, the two connecting parts 12 are connected and fixed, so that the contact part 11 and the stator winding 200 are tightly fitted to generate clamping force. The operator moves the stator winding 200 into the high-temperature stator housing 300 by grasping the holding part 20. Subsequently, the two connecting parts 12 are released, causing the contact part 11 to disengage from the stator winding 200. Finally, the entire heat-shrinking fixture 100 is removed, and the stator housing 300 is fixed to the stator winding 200 after cooling.

[0026] The heat fitting fixture 100 enables manual, safe, and rapid assembly operations without relying on mechanical handling. It is easy to operate, improves the safety of operators, saves time, and increases production efficiency.

[0027] It should be understood that the heat fitting 100 is used to assemble a stator winding 200 of a fixed size. When used for stator windings 200 of different sizes, it is necessary to replace the fasteners 10 of different sizes. The fixing space between the two fasteners 10 is slightly smaller than the diameter of the contact point of the stator winding 200 to form sufficient clamping force and friction to prevent the stator winding 200 from loosening during assembly.

[0028] Specifically, fastener 10 is as follows Figure 3 The semi-circular ring shown is used to clamp the stator winding 200. The fixed space is a complete cylindrical space formed between the two fasteners 10 after they are combined. The inner circle of the semi-circular ring is the contact part 11 that contacts the stator winding 200, and the connecting part 12 is the circumferential end of the semi-circular ring.

[0029] In one embodiment, the two semi-circular rings (fixing members 10) are independent of each other, with connecting parts 12 at both ends. Each end is provided with a connecting plate 13 that can be fixed together. The two connecting plates 13 are fixed by bolts and nuts. In this case, both connecting plates 13 need to be fixed simultaneously during fixing, while when removing them from the stator winding 200, only one pair of connecting plates 13 needs to be loosened. Of course, both pairs of connecting plates 13 can also be loosened simultaneously; this embodiment is not limited to this.

[0030] In another embodiment, one end of the two semicircular rings can be pivotally connected, while the other end is fixed by a matching adapter plate 13. This configuration allows for easier operation by requiring only operation of one end.

[0031] Preferably, the adapter plate 13 and the fixing member 10 are detachably fixed. For example, in... Figure 3In the illustrated embodiment, the adapter plate 13 is fixed to the fastener 10 by bolts. In this configuration, the adapter plate 13 and the fastener 10 can be manufactured separately, simplifying the process. Of course, the adapter plate 13 can also be integrally cast with the fastener 10, resulting in higher strength.

[0032] When the adapter plate 13 and the fixing member 10 are manufactured independently and can be detachably fixed, a groove 14 for accommodating the adapter plate 13 is provided at the end of the fixing member 10. The depth of the groove 14 in the circumferential direction is the same as the thickness of the adapter plate 13. That is, when the adapter plate 13 is fixed in the groove 14, the surface of the adapter plate 13 is flush with the end surface of the fixing member 10, so that no gap is generated at the connection part 12 when the two fixing members 10 are fixed, thereby improving the stability of the connection.

[0033] In one embodiment, a portion of the handle 20 protrudes radially inward along the fixing member 10, such that when fixing the stator winding 200, the end of the stator winding 200 can only move to a position abutting against the handle 20. This arrangement restricts the position of the stator winding 200 during fixing, meaning the heat fitting 100 can only be fixed at the end of the stator winding 200, allowing the stator winding 200 to penetrate deep into the stator housing 300 during assembly.

[0034] Preferably, to further prevent the stator winding 200 from coming loose during movement, a buffer element such as a rubber strip can be fixed on the inner circle of the fixing member 10 to increase the contact area and friction.

[0035] The handheld part 20 includes two parts: a mounting block 21 and a handle 22. The mounting block 21 is fixed to the fixing member 10, and the handle 22 is fixed to the mounting block 21. It is the part held by the operator. Part of the mounting block 21 protrudes inward in a radial direction to limit the movement distance of the stator winding 200.

[0036] Preferably, the mounting block 21 and the fastener 10 are detachably fixed together, and the two are manufactured independently. For example, in Figure 3 In the middle, the mounting block 21 is fixed to the fastener 10 by bolts.

[0037] It is easy to imagine that the handle 22 and the mounting block 21 are also detachably fixed, and the two are made independently and fixed to the mounting block 21 by bolts.

[0038] In a preferred embodiment, the handle 22, mounting block 21, fastener 10, and adapter plate 13 are all manufactured independently and are standard-shaped structural components, thus eliminating the need for separate molds and making manufacturing more flexible and easier. These components can be made from low-cost and readily available materials such as aluminum alloy and stainless steel; this embodiment is not limiting.

[0039] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot jacketing tool, characterized in that, include: Two fixing members are provided, and a fixing space for the stator winding is formed between the fixing members. Each fixing member is provided with a contact part that is in close contact with the stator winding and provides clamping force. At least one connecting part between the two fixing members is provided, which can be connected and fixed to each other or disengaged from each other. The two hand-held parts are respectively fixed to the two aforementioned fasteners.

2. The shrink fit tooling of claim 1, wherein, The fixing member is a semi-circular ring, the fixing space is formed between the two semi-circular rings, the contact part is formed on the inner circle of the semi-circular ring, and the connecting part is formed at the ends of the two semi-circular rings.

3. The shrink fit tooling of claim 2, wherein, The two semicircular rings are independent of each other, and each end of each semicircular ring is provided with a connecting plate that can be fixed together.

4. The shrinker tool of claim 2, wherein, The two semi-circular rings are pivotally connected at one end, and the other end is provided with an adapter plate that can be fixed together.

5. The shrinker tool according to claim 3 or 4, characterized in that The adapter plate and the semi-circular ring are detachably fixed.

6. The heat-shrink fitting according to claim 5, characterized in that, The end of the semi-circular ring is provided with a groove for accommodating the adapter plate, and the depth of the groove in the circumferential direction is the same as the thickness of the adapter plate.

7. The shrinker tool of claim 2, wherein, The hand-held portion described herein protrudes inward along the radial direction of the semi-circular ring.

8. The shrinker tool of claim 1, wherein, The handheld part includes a mounting block fixed to a fixing member and a handle fixed to the mounting block.

9. The shrinker tool of claim 8, wherein, The mounting block and the fastener are detachable and can be fixed together.

10. The shrinker tool of claim 8, wherein, The handle and the mounting block are detachable and fixed.

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