Clamp

Abstract

The utility model provides a clamp which is helpful for preventing a paint film of a part adjacent to a tail end of a wire rod from being damaged by heat when the tail end of a protruding part of the wire rod of a processing object is welded. The clamp comprises a supporting part, the supporting part is used for supporting an annular main body in the operation of welding the tail end of a wire rod protruding part which protrudes from the axial end face of the annular main body of a processed object and is arranged in an annular mode, and the supporting part comprises a liquid cooling part and a heating part, a liquid cooling part for cooling the annular main body on the outer peripheral side of the wire rod protruding part; and an air cooling part for cooling the wire rod protruding part from the inner peripheral side.

Description

Technical Field

[0001] The utility model relates to a clamp. Background Art

[0002] In the past, when manufacturing a stator assembly including an annular stator core and coil wires wound around the stator core, a clamp was sometimes used, which included a support portion for supporting the stator core during the welding operation of the protruding ends of the coil wires of the stator assembly that protrude from the axial end surface of the stator core and are arranged in a ring shape.

[0003] However, when the above welding is actually performed, the paint film in the portion (non-welding area) of the coil wire adjacent to the protruding end (ie, the welding area) is easily damaged by the heat from the protruding end, resulting in a substandard stator assembly. Utility Model Content

[0004] The present invention is completed in view of the above problems, and its purpose is to provide a clamp that helps to prevent the part of the wire adjacent to the end from being damaged by heat when welding the end of the protruding portion of the wire to be processed.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a clamp, including a supporting part, which is used to support the annular body during the operation of welding the ends of the wire protrusions protruding from the axial end face of the annular body of the processing object and arranged in a ring shape, wherein the supporting part includes: a liquid cooling part, which is used to liquid-cool the annular body on the outer peripheral side of the wire protrusion; and an air cooling part, which is used to air-cool the wire protrusions from the inner peripheral side.

[0006] According to the clamp of the present invention, it includes: a liquid cooling part, which is used to liquid-cool the annular body on the outer peripheral side of the wire protrusion; and an air cooling part, which is used to air-cool the wire protrusion from the inner peripheral side. Therefore, when welding the end of the wire of the processing object (that is, the welding area), the liquid cooling part can be used to indirectly cool the part of the wire adjacent to its end (that is, the non-welding area) from the outer peripheral side of the wire protrusion, and the air cooling part can be used to directly cool the part of the wire adjacent to its end from the inner peripheral side of the wire protrusion, which can effectively reduce the temperature of the part of the wire adjacent to its end, thereby preventing the paint film of this part from being damaged.

[0007] Furthermore, in the clamp of the present invention, it is preferable that the liquid cooling portion includes a cooling liquid flow path through which cooling liquid flows, and the cooling liquid flow path surrounds the wire rod protruding portion on the outer circumference side.

[0008] According to the clamp of the present invention, the liquid cooling part has a cooling liquid flow path for circulating the cooling liquid, and the cooling liquid flow path surrounds the wire protrusion on the outer circumference. Therefore, when welding the end of the wire to be processed, it helps to evenly cool the annular body in the entire circumference, and then evenly cool the part of the wire adjacent to its end in the entire circumference.

[0009] Furthermore, in the clamp of the present invention, it is preferred that the coolant flow path extends in a meandering manner.

[0010] According to the fixture of the present invention, the cooling liquid flow path extends in a winding manner, thereby helping to improve the cooling capacity of the liquid cooling part without increasing the size of the fixture, thereby improving the cooling effect.

[0011] In addition, in the clamp of the present invention, it is preferred that the air-cooling part has a cold air flow path for circulating cold air, and the cold air flow path has a main flow path part, an air storage part and a terminal flow path part arranged in sequence from the air supply source side, and the air storage part is annular, and the terminal flow path part is provided in plurality in a manner of forking and extending from the air storage part toward the outer peripheral side, and is used to blow cold air from the inner peripheral side toward the part of the wire adjacent to the end.

[0012] According to the fixture of the present invention, the air cooling part has a cold air flow path for circulating cold air, and the cold air flow path has a main flow path part, an air storage part and a terminal flow path part arranged in sequence from the air supply source side. The air storage part is annular, and a plurality of terminal flow path parts are provided in a manner of forking and extending from the air storage part toward the outer peripheral side, and are used to blow cold air from the inner peripheral side toward the part of the wire adjacent to the end. Therefore, when welding the end of the wire of the processing object, it helps to directly cool the part of the wire adjacent to its end evenly in the entire circumference, and can also prevent the cold air from directly contacting the end of the wire to cause poor welding.

[0013] Furthermore, in the clamp of the present invention, it is preferred that the flow cross sections of the air storage portion, the main flow path portion, and the terminal flow path portion decrease in sequence.

[0014] According to the clamp of the present invention, the flow cross-sections of the air storage part, the main flow path part and the terminal flow path part are reduced in sequence. Therefore, while ensuring the cold air delivery efficiency of the main flow path part, it is easy to increase the speed of the cold air blown out from the air cooling part to the wire protrusion part, further improving the cooling effect.

[0015] Furthermore, in the clamp of the present invention, it is preferred that the terminal flow path portion has an intersection portion, and when viewed in the axial direction, the intersection portion is X-shaped or V-shaped opening toward the outer peripheral side.

[0016] Furthermore, in the clamp of the present invention, it is preferable that the axial end surface is an end surface on one side in the axial direction of the annular body, and the liquid cooling portion is used to liquid-cool the annular body from one side in the axial direction.

[0017] In addition, in the clamp of the present invention, the supporting part preferably includes: a base that supports the annular body from the other axial side; and a clamping part that presses the annular body from one axial side and supports the liquid cooling part from the other axial side.

[0018] According to the fixture of the present invention, the supporting part includes: a base, which supports the annular body from the other side in the axial direction; and a clamping part, which presses the annular body from one side in the axial direction and supports the liquid cooling part from the other side in the axial direction. Therefore, when welding the end of the wire of the processing object, it helps to stably maintain the processing object and suppress welding problems caused by unexpected changes in the position of the processing object.

[0019] Furthermore, in the clamp of the present invention, it is preferred that the clamping portion has a positioning groove into which the liquid cooling portion is inserted.

[0020] According to the clamp of the present invention, the clamping portion has a positioning groove for the liquid cooling portion to be embedded in, thereby helping to prevent the liquid cooling portion from moving in the radial direction and ensuring cooling uniformity.

[0021] In addition, in the clamp of the present invention, the air-cooling part preferably has a disk-shaped part and a rod-shaped part, the disk-shaped part is located on the inner peripheral side of the wire protrusion arranged in a ring shape, overlaps with the wire protrusion when viewed in the radial direction, and is provided with a disk-shaped part flow path for circulating cooling air and opening on the outer peripheral surface of the disk-shaped part, and the rod-shaped part extends from the disk-shaped part toward the other side in the axial direction, and is provided with a rod-shaped part flow path for circulating cooling air and connected to the disk-shaped part flow path.

[0022] (Utility Model Effect)

[0023] According to the utility model, the clamp includes: a liquid cooling part, which is used to liquid-cool the annular body on the outer peripheral side of the wire protrusion; and an air cooling part, which is used to air-cool the wire protrusion from the inner peripheral side. Therefore, when welding the end of the wire of the processing object (i.e., the welding area), the liquid cooling part can be used to indirectly cool the part of the wire adjacent to its end (i.e., the non-welding area) from the outer peripheral side of the wire protrusion, and the air cooling part can be used to directly cool the part of the wire adjacent to its end from the inner peripheral side of the wire protrusion, which can effectively reduce the temperature of the part of the wire adjacent to its end, thereby preventing the paint film of this part from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall side sectional view schematically showing a clamp and a processing object held by the clamp according to an embodiment of the present invention.

[0025] Figure 2It is a partial side cross-sectional view schematically showing a clamp and a processing object held by the clamp according to an embodiment of the present invention.

[0026] Figure 3 It is a partial top cross-sectional view schematically showing a clamp and a processing object held by the clamp according to an embodiment of the present invention.

[0027] Figure 4 It is a partial perspective view schematically showing a clamp and a processing object held by the clamp according to an embodiment of the present invention.

[0028] Figure 5 It is an exploded view schematically showing a clamp according to an embodiment of the present invention.

[0029] Figure 6 It is a partial exploded view schematically showing a clamp according to an embodiment of the present invention.

[0030] Figure 7 Schematic diagram of the internal structure of the liquid cooling unit in the clamp according to the embodiment of the present invention.

[0031] Figure 8 It is a partial perspective view schematically showing an air cooling portion in a clamp according to an embodiment of the present invention.

[0032] (Explanation of Symbols)

[0033] 1 fixture

[0034] 10 Support

[0035] 11 Base

[0036] 111 First Board

[0037] 112 Second Board

[0038] 113 connecting column

[0039] 114 cylindrical part

[0040] 12 Clamping part

[0041] 121 disc-shaped body

[0042] 1211 through hole

[0043] 1212 positioning slot

[0044] 20 Liquid cooling unit

[0045] 29 Coolant flow path

[0046] 30 air cooling unit

[0047] 31 disc

[0048] 32 rod-shaped part

[0049] 39 Cold air flow path

[0050] 391 Main Road

[0051] 392 Gas Storage Department

[0052] 393 Terminal flow path section

[0053] E1 coolant inlet

[0054] E2 coolant outlet

[0055] W Processing Object

[0056] W1 Ring Body

[0057] W11 axial end face

[0058] W2 Wire

[0059] W21 Wire protrusion

[0060] P Gas supply

[0061] L1 Axis upward side

[0062] L2 The other side of the axis DETAILED DESCRIPTION

[0063] Next, combine Figures 1 to 8 A clamp according to an embodiment of the present invention will be described.

[0064] Here, for the sake of convenience, the extension direction of the center line of the ring formed by the annularly arranged wire protrusions W21 of the processing object W is referred to as "axial", the circumferential and radial directions centered on the above-mentioned center line are referred to as "circumferential" and "radial", the outer peripheral side and inner peripheral side based on the above-mentioned center line are referred to as "outer peripheral side" and "inner peripheral side", and one side in the axial direction is set as L1, and the other side in the axial direction is set as L2.

[0065] (Overall structure of the fixture)

[0066] like Figures 1 to 4 As shown, the fixture 1 includes a supporting portion 10, which is used to support the annular body W1 during the operation of welding the end of the wire protrusion W21 of the processing object W that protrudes from the axial end face W11 of its annular body W1 and is arranged in a ring shape; and the fixture 1 also includes: a liquid cooling portion 20, which is used to liquid-cool the annular body W1 on the outer peripheral side of the wire protrusion W21; and an air cooling portion 30, which is used to air-cool the wire protrusion W21 from the inner peripheral side.

[0067] Here, if Figure 4 and Figure 5 As shown, the object W is a stator assembly, comprising an annular stator core and coil wire wound around the stator core. The stator core comprises an annular main body W1, for example, having an annular portion and pole teeth protruding inward from the annular portion. The coil wire comprises a wire rod W2, comprising a copper wire and a varnish coating covering the outer surface of the copper wire. The coil wire has a wire rod protrusion W21, and the centerline of the loop formed by the wire rod protrusion W21 is aligned with the centerline of the stator core.

[0068] In addition, if Figure 4 As shown, the axial end face W11 is an end face on one side L1 of the annular body W1 in the axial direction.

[0069] (Structure of Supporting Part)

[0070] like Figure 1 and Figure 5 As shown, the support portion 10 includes: a base 11 that supports the annular body W1 from the other axial side L2; and a clamping portion 12 that presses the annular body W1 from one axial side L1 and supports the liquid cooling portion 20 from the other axial side L2.

[0071] Here, if Figure 5 As shown, the base 11 includes: a first plate 111, which is generally rectangular and extends in the radial direction; a second plate 112, which is generally rectangular and extends in the radial direction, and is spaced apart from the first plate 111 on one axial side L1 and has a through hole formed in the center; and a connecting post 113, which connects the corners of the first plate 111 and the second plate 112. The surface of the axial side L1 of the first plate 111 constitutes, for example, a work reference surface.

[0072] In addition, if Figure 5 As shown, a cylindrical portion 114 is provided on the second plate 112, which protrudes toward one axial side L1. The cylindrical portion 114 is used to support the annular body W1 of the processing object W from the other axial side L2 and to position the annular body W1 of the processing object W in the radial direction.

[0073] In addition, if Figure 5 and Figure 6 As shown, the clamping portion 12 includes a disc-shaped body 121 that expands in the radial direction and is used to press the annular body W1 of the treatment object W from one side L1 in the axial direction.

[0074] In addition, if Figure 5 and Figure 6As shown, the disc-shaped body 121 has a positioning groove 1212 for the liquid cooling unit 20 to fit in. Specifically, a through hole 1211 is formed in the center of the disc-shaped body 121, and an annular positioning groove 1212 is formed on the outer periphery of the through hole 1211 and on one axial side L1 of the disc-shaped body 121.

[0075] (Structure of liquid cooling unit)

[0076] like Figure 7 As shown, the liquid cooling unit 20 includes a cooling liquid flow path 29 through which the cooling liquid flows.

[0077] Here, if Figure 6 and Figure 7 As shown, the liquid cooling portion 20 is annular as a whole, and the cooling liquid flow path 29 surrounds the wire protruding portion W21 on the outer circumference side.

[0078] In addition, if Figure 7 As shown, the coolant flow path 29 extends in a zigzag manner. Specifically, the coolant flow path 29 extends in a zigzag manner over substantially the entire circumference.

[0079] In addition, if Figure 6 and Figure 7 As shown, the liquid cooling unit 20 has a cooling liquid inlet E1 and a cooling liquid outlet E2 . The cooling liquid can flow into the cooling liquid flow path 29 from the cooling liquid inlet E1 and flow out from the cooling liquid outlet E2 .

[0080] In addition, if Figure 6 and Figure 7 As shown, the liquid cooling unit 20 liquid-cools the annular body W1 from one side L1 in the axial direction.

[0081] (Structure of air cooling unit)

[0082] like Figure 1 and Figure 3 As shown, the air cooling unit 30 has a cold air flow path 39 for cold air to flow.

[0083] Here, if Figure 1 and Figure 3 As shown, the cold air flow path 39 has a main flow path portion 391, an air storage portion 392 and a terminal flow path portion 393 arranged in sequence from the air supply source P (such as an air pump, providing compressed air) side, the air storage portion 392 is annular, and a plurality of terminal flow path portions 393 are arranged in a manner of forking and extending from the air storage portion 392 toward the outer peripheral side, and are used to blow cold air from the inner peripheral side toward the portion of the wire W2 adjacent to the end of the wire protrusion W21.

[0084] In addition, if Figure 2 and Figure 3 As shown, the flow cross-sections of the air storage portion 392 , the main flow path portion 391 and the terminal flow path portion 393 decrease in sequence.

[0085] In addition, if Figure 3 As shown, the terminal flow path portion 393 has a cross section that, when viewed axially, forms an X-shape. When blowing cold air from the terminal flow path portion 393 toward the portion of the wire W2 adjacent to its terminal end, the pressure of the blowing air is preferably 0.25-0.35 MPa. This ensures a cooling effect while preventing the copper wires of the wire W2 from being loosely soldered.

[0086] In this embodiment, if Figures 4 to 6 and Figure 8 As shown, the air-cooling portion 30 includes a disk-shaped portion 31 and a rod-shaped portion 32. The disk-shaped portion 31 is located on the inner circumferential side of the annularly arranged wire protrusions W21, overlaps with the wire protrusions W21 when viewed in the radial direction, and is provided with a disk-shaped portion flow path for cooling air to circulate and open on the outer circumferential surface of the disk-shaped portion 31. The rod-shaped portion 32 extends from the disk-shaped portion 31 toward the other axial side L2, and is provided with a rod-shaped portion flow path for cooling air to circulate and connected to the disk-shaped portion flow path. The rod-shaped portion 32 extends from the air supply source P provided between the first plate 111 and the second plate 112 of the base 11 toward the one axial side L1, passes through the through hole of the second plate 112, and the inner side of the cylindrical portion 114 in sequence to reach the disk-shaped portion 31.

[0087] In addition, if Figure 3 As shown, the above-mentioned disc-shaped flow path includes a part of the above-mentioned main flow path portion 391 (in the illustrated example, four branch portions extending radially outward from the end of one side L1 on the axial direction of the rod-shaped flow path), and includes the above-mentioned air storage portion 392 and the terminal flow path portion 393.

[0088] In addition, if Figure 1 and Figure 2 As shown, the flow path of the rod-shaped portion extends in the axial direction.

[0089] (Main Effects of This Embodiment)

[0090] According to the clamp 1 of this embodiment, it includes: a liquid cooling part 20, which is used to liquid-cool the annular main body W1 on the outer peripheral side of the wire protrusion W21; and an air cooling part 30, which is used to air-cool the wire protrusion W21 from the inner peripheral side. Therefore, when welding the end (i.e., the welding area) of the wire W2 of the processing object W, the liquid cooling part 20 can be used to indirectly cool the part of the wire W2 adjacent to its end (i.e., the non-welding area) from the outer peripheral side of the wire protrusion W21, and the air cooling part 30 can be used to directly cool the part of the wire W adjacent to its end from the inner peripheral side of the wire protrusion W21, which can effectively reduce the temperature of the part of the wire W2 adjacent to its end, thereby preventing the paint film of this part from being damaged.

[0091] The present invention has been described above by way of example with reference to the accompanying drawings. It is apparent that the specific implementation of the present invention is not limited to the above-mentioned embodiments.

[0092] For example, in the above embodiment, the processing object W is a stator assembly, but the present invention is not limited thereto. The processing object W may also be another component having an annular body and wire protrusions protruding from the axial end surface of the annular body and arranged in an annular shape.

[0093] Furthermore, in the above-described embodiment, the specific structure of the support portion 10 is not limited to the illustrated example, and can be appropriately modified as needed.

[0094] Furthermore, in the above embodiment, the clamping portion 12 has the positioning groove 1212 for the liquid cooling portion 20 to be inserted into, but the present invention is not limited thereto and the positioning groove 1212 may be omitted.

[0095] Furthermore, in the above embodiment, the liquid cooling unit 20 is detachable from the clamping unit 12 , but the present invention is not limited thereto. The liquid cooling unit 20 may be formed integrally with the clamping unit 12 .

[0096] Furthermore, in the above-described embodiment, water may be used as the coolant, or other substances such as oil may be used.

[0097] Furthermore, in the above embodiment, the coolant flow path 29 extends in a meandering manner, but the present invention is not limited thereto. The coolant flow path 29 may be provided to extend smoothly (for example, the coolant flow path 29 may be provided to extend on a strictly circular trajectory).

[0098] In addition, in the above embodiment, the coolant flow path 29 surrounds the wire protrusion W21 on the outer peripheral side, and the portion of the wire protrusion W21 surrounded by the coolant flow path 29 is more than half a circumference of the wire protrusion W21, but it is not limited to this. It can also be set that the portion of the wire protrusion W21 surrounded by the coolant flow path 29 is less than half a circumference of the wire protrusion W21.

[0099] In addition, in the above embodiment, the flow cross-sections of the air storage portion 392, the main flow path portion 391 and the terminal flow path portion 393 decrease in sequence, but are not limited to this. The flow cross-sections of the main flow path portion 391, the air storage portion 392 and the terminal flow path portion 393 may also be the same size, or the flow cross-section of the air storage portion 392 may be larger than the flow cross-sections of the main flow path portion 391 and the terminal flow path portion 393, but the flow cross-sections of the main flow path portion 391 and the terminal flow path portion 393 may be the same size.

[0100] Furthermore, in the above embodiment, the intersection portion of the terminal flow path portion 393 is X-shaped when viewed in the axial direction, but the present invention is not limited thereto and may be formed in a V-shape opening toward the outer peripheral side.

[0101] It should be understood that within the scope of the present invention, various parts in the embodiments can be freely combined, or various parts in the embodiments can be appropriately deformed or omitted.

Claims

1. A clamp comprising a supporting portion for supporting the annular body during welding of the ends of the wire protrusions of the annular body of the object to be processed, the supporting portion being used to support the annular body, wherein: include: a liquid cooling portion for liquid cooling the annular body on an outer peripheral side of the wire protrusion; as well as The air cooling portion is used to air cool the wire rod protruding portion from the inner peripheral side.

2. The clamp according to claim 1, wherein The liquid cooling unit has a cooling liquid flow path for cooling liquid to flow. The coolant flow path surrounds the wire protrusion at an outer peripheral side.

3. The clamp according to claim 2, wherein: The coolant flow path extends in a winding manner.

4. The clamp according to claim 1, wherein: The air cooling part has a cold air flow path for cold air to flow. The cold air flow path comprises a main flow path portion, an air storage portion and a terminal flow path portion arranged in sequence from the air supply source side. The gas storage portion is annular, The terminal flow path portion is provided in a plurality so as to branch and extend from the air storage portion toward the outer peripheral side, and is configured to blow cold air from the inner peripheral side toward a portion of the wire rod adjacent to the terminal.

5. The clamp according to claim 4, wherein: The flow cross sections of the gas storage portion, the main flow path portion and the terminal flow path portion decrease in sequence.

6. The clamp according to claim 4, wherein: The terminal flow path portion has a cross section, When viewed in the axial direction, the intersection portion is in an X-shape or a V-shape that opens toward the outer peripheral side.

7. The clamp according to claim 1, wherein The axial end face is an end face on one side of the annular body in the axial direction. The liquid cooling portion is used to liquid-cool the annular body from one side in the axial direction.

8. The clamp according to claim 7, wherein: The support portion includes: a base supporting the annular body from the other side in the axial direction; and A clamping portion presses the annular body from one axial side and supports the liquid cooling portion from the other axial side.

9. The clamp according to claim 8, wherein The clamping portion has a positioning groove for the liquid cooling portion to be embedded in.

10. The clamp according to claim 8, wherein The air cooling part has a disc-shaped part and a rod-shaped part. The disc-shaped portion is located on the inner circumferential side of the annularly arranged wire protrusions and overlaps with the wire protrusions when viewed in the radial direction. A disc-shaped portion flow path is provided for cooling air to flow through and is open on the outer circumferential surface of the disc-shaped portion. The rod-shaped portion extends from the disk-shaped portion toward the other side in the axial direction and is provided with a rod-shaped portion flow path through which cool air flows and which communicates with the disk-shaped portion flow path.

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