A welding aid

Abstract

The embodiment of the present application provides a welding auxiliary tool, which comprises a mounting seat and a rotating mechanism, the rotating mechanism comprises a rotating shaft, the rotating shaft is rotationally connected to the mounting seat; a positioning piece is fixedly connected to the rotating shaft and is provided with a bracket positioning part and a valve body positioning part; a bracket clamping mechanism is connected to the positioning piece and is located at least partially on one side of the bracket positioning part away from the valve body positioning part, and is used for driving the bracket to be close to the valve body; a valve body clamping mechanism is connected to the positioning piece and is located at least partially on one side of the valve body positioning part away from the bracket positioning part, and is used for driving the valve body to be close to the bracket; and a rotating positioning mechanism is connected to the mounting seat and is in positioning cooperation with the rotating shaft, so as to limit the rotation of the rotating shaft. The welding auxiliary tool in the embodiment of the present application improves the welding efficiency, precision and strength between the bracket and the valve body, and improves the consistency and stability of the welding quality of the electronic expansion valve.

Description

Technical Field

[0001] This application belongs to the field of welding tooling technology, specifically relating to a welding auxiliary tooling. Background Technology

[0002] As a core control component in air conditioning systems, the electronic expansion valve achieves temperature control through methods such as throttling and pressure reduction, and regulating refrigerant flow. During the manufacturing process, the valve body and support of the electronic expansion valve need to be welded together to ensure that the valve can withstand the dynamic loads during the operation of the air conditioning system.

[0003] In related technologies, the welding fixtures used for welding the valve body and bracket of electronic expansion valves have limited positioning accuracy for the valve body and bracket, which limits the improvement of welding accuracy, welding strength and welding consistency. Utility Model Content

[0004] This application aims to provide a welding auxiliary tooling that at least solves the problem of limited positioning accuracy of valve bodies and supports in existing welding tooling.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a welding auxiliary tooling, including: A mounting base and a rotating mechanism, the rotating mechanism including a rotating shaft rotatably connected to the mounting base; A positioning component is fixedly connected to the rotating shaft to rotate with the rotating shaft. The positioning component is provided with a bracket positioning part and a valve body positioning part. The bracket positioning part and the valve body positioning part are arranged along a first direction and are used to position the bracket and the valve body respectively. A bracket clamping mechanism is connected to the positioning member and is at least partially located on the side of the bracket positioning portion away from the valve body positioning portion, and is used to drive the bracket closer to the valve body; A valve body clamping mechanism is connected to the positioning member and is at least partially located on the side of the valve body positioning portion away from the bracket positioning portion, and is used to drive the valve body closer to the bracket; And a rotary positioning mechanism, which is connected to the mounting base and positions itself in conjunction with the rotary shaft to restrict the rotation of the rotary shaft.

[0006] Optionally, the bracket clamping mechanism includes a first guide shaft, a first clamping member, a first spring, and a first limiting member. The first guide shaft passes through the positioning member along the first direction. The first clamping member is connected to one end of the first guide shaft near the bracket positioning part. The first limiting member is connected to the other end of the first guide shaft. The first spring is sleeved on the first guide shaft and located between the positioning member and the first limiting member. Under the action of the elastic restoring force of the first spring, the first clamping member has a tendency to move closer to the bracket positioning part.

[0007] Optionally, the bracket clamping mechanism further includes a first driving member, the output end of which is connected to at least one of the first clamping member and the first limiting member. The first driving member is used to drive the first guide shaft to move along the first direction and compress the first spring so that the first spring generates an elastic restoring force.

[0008] Optionally, the first clamping member includes a connecting part and a clamping part, the connecting part and the clamping part are arranged at an angle, the connecting part is used to connect with the first guide shaft, and the clamping part is provided with an arc-shaped mating surface, the arc-shaped mating surface is used to abut against the bracket.

[0009] Optionally, the bracket clamping mechanism further includes a pressure plate connected to the positioning member and extending at least partially above the first clamping member, the pressure plate being used to limit the first clamping member.

[0010] Optionally, the valve body clamping mechanism includes a second guide shaft, a second clamping member, a second spring, and a second limiting member. The second guide shaft passes through the positioning member along the first direction. The second clamping member is connected to one end of the second guide shaft near the valve body positioning part. The second limiting member is connected to the other end of the second guide shaft. The second spring is connected to the second guide shaft and is located between the positioning member and the second limiting member. Under the action of the elastic restoring force of the second spring, the second clamping member has a tendency to move closer to the valve body positioning part.

[0011] Optionally, the valve body clamping mechanism further includes a second driving member, the output end of which is connected to at least one of the second clamping member and the second limiting member. The second driving member is used to drive the second guide shaft to move along the first direction and compress the second spring so that the second spring generates an elastic restoring force.

[0012] Optionally, the positioning component includes a positioning component body and a positioning component seat. The positioning component seat is fixedly connected to the rotating shaft and is provided with a positioning component body mounting groove. The positioning component body is fixedly connected in the positioning component body mounting groove. The bracket positioning part and the valve body positioning part are disposed on the positioning component body. The bracket clamping mechanism and the valve body clamping mechanism are both connected to the positioning component seat.

[0013] Optionally, the bracket positioning part is a positioning protrusion, which protrudes from the upper surface of the positioning member body and is used to abut against the bracket, and the valve body positioning part is a positioning hole.

[0014] Optionally, the positioning element further includes a height adjusting element disposed within the positioning hole.

[0015] Optionally, the positioning hole is a through hole, and the positioning component seat and the rotating shaft are respectively provided with a first vent hole and a second vent hole, and the positioning hole is interconnected with the first vent hole and the second vent hole.

[0016] Optionally, the welding auxiliary tooling further includes a rotary positioning mechanism connected to the mounting base. The rotary positioning mechanism is provided with a first positioning part, and the rotary shaft is provided with a second positioning part. The first positioning part and the second positioning part cooperate to restrict the rotation of the rotary shaft.

[0017] Optionally, the rotary positioning mechanism includes a rotary positioning seat, a third guide shaft, a third spring, and a rotary positioning component. The rotary positioning seat is fixedly connected to the mounting base, and both ends of the third guide shaft are fixedly connected to the rotary positioning seat. The third spring and the rotary positioning component are both sleeved on the third guide shaft. The first positioning part is disposed on the rotary positioning component. Under the action of the elastic restoring force of the third spring, the first positioning part of the rotary positioning component approaches the second positioning part of the rotary shaft and is positioned and engaged with the second positioning part.

[0018] Optionally, the rotary positioning mechanism further includes a third driving member, the output end of which is connected to the rotary positioning member. The third driving member is used to drive the rotary positioning member away from the rotation axis, so that the first positioning part is separated from the second positioning part.

[0019] Optionally, the mounting base includes a mounting plate, a bearing housing, and a bearing. The bearing housing is connected to the mounting plate, the outer ring of the bearing is fixedly connected to the bearing housing, and the inner ring of the bearing is fixedly connected to the rotating shaft. The rotating mechanism further includes a fourth driving member, which is connected to the rotating shaft and used to drive the rotating shaft to rotate around its circumference.

[0020] In this embodiment, the rotating shaft is rotatably connected to the mounting base, and the positioning component is fixedly connected to the rotating shaft. The bracket positioning part and the valve body positioning part provided on the positioning component can respectively position the bracket and the valve body, and maintain the relative position between the bracket and the valve body. Furthermore, the bracket clamping mechanism can drive the bracket closer to the valve body, and the valve body clamping mechanism can drive the valve body closer to the bracket. Under the double clamping action of the bracket clamping mechanism and the valve body clamping mechanism, the bracket and the valve body can form a tight contact, which is beneficial to improving the accuracy of the welding position and the welding strength between them. During the welding process, the rotating shaft can drive the positioning component to rotate, thereby realizing the joint rotation of the bracket and the valve body to cooperate with external welding equipment to complete the welding operation of the bracket and the valve body. The welding auxiliary tooling in this embodiment realizes the rotation of the bracket and the valve body during the welding process through the cooperation of the above structures, and improves the welding accuracy and strength between them, thereby ensuring the structural accuracy and structural strength of the electronic expansion valve, and improving the consistency and stability of the welding quality of the electronic expansion valve.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the bracket for the electronic expansion valve in the embodiments of this application; Figure 2 This is a schematic diagram of the valve body of the electronic expansion valve in the embodiments of this application; Figure 3 This is a schematic diagram of the welding auxiliary tooling in the embodiments of this application; Figure 4 yes Figure 3 Front view of the welding auxiliary tooling; Figure 5 yes Figure 4 Left view of the welding auxiliary tooling; Figure 6 yes Figure 4 Right view of the welding auxiliary tooling; Figure 7 yes Figure 5 , Figure 6 Cross-sectional view of the welding auxiliary tooling along section line AA; Figure 8 This is a schematic diagram of the structure of the first clamping member in the embodiments of this application; Figure 9 This is a schematic diagram of the cooperation between the first clamping member, the pressure plate, and the bracket in the embodiments of this application; Figure 10This is a schematic diagram of the engagement of the first clamping member, the pressure plate, and the bracket at another angle in an embodiment of this application; Figure 11 This is a schematic diagram of the structure of the positioning element body in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of the rotating shaft in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of the rotary positioning component in the embodiments of this application.

[0023] Reference numerals: 100-Welding auxiliary tooling, 10-Mounting base, 11-Mounting plate, 12-Bearing seat, 13-Bearing, 20-Rotating mechanism, 21-Rotating shaft, 211-Support part, 2111-Second positioning part, 212-Shaft body, 213-Locking element, 214-Second vent hole, 22-Fourth driving element, 30-Positioning element, 31-Positioning element seat, 311-Padded block, 32-Positioning element body, 321-Bracket positioning part, 3211-Positioning protrusion, 322-Valve body positioning part, 3221-Positioning hole, 33-Height adjustment element, 331-First vent hole, 40-Bracket clamping mechanism, 41-First guide shaft, 42 - First clamping member, 421- Connecting part, 422- Clamping part, 4221- Arc-shaped mating surface, 4222- Recess, 4223- Boss, 43- First spring, 44- First limiting member, 45- First driving member, 46- Pressure plate, 50- Valve body clamping mechanism, 51- Second guide shaft, 52- Second clamping member, 53- Second spring, 54- Second limiting member, 55- Second driving member, 60- Rotary positioning mechanism, 61- Rotary positioning seat, 62- Third guide shaft, 63- Third spring, 64- Rotary positioning member, 641- First positioning part, 65- Third driving member, 200- Bracket, 300- Valve body, X- First direction. Detailed Implementation

[0024] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] As a core control component in air conditioning systems, the electronic expansion valve achieves temperature control through methods such as throttling and pressure reduction, and regulating refrigerant flow. During the manufacturing process, the valve body and support of the electronic expansion valve need to be welded together to ensure that the valve can withstand the dynamic loads during the operation of the air conditioning system.

[0029] In related technologies, the welding fixtures used for welding the valve body and bracket of electronic expansion valves have limited positioning accuracy for the valve body and bracket, which limits the welding accuracy and welding strength of the bracket and valve body in electronic expansion valves, affecting the structural accuracy and structural strength of electronic expansion valves, and the welding quality consistency between different batches of electronic expansion valves is poor.

[0030] This application provides a welding auxiliary tooling 100, such as... Figures 3 to 7As shown, the welding auxiliary fixture 100 includes: a mounting base 10 and a rotating mechanism 20. The rotating mechanism 20 includes a rotating shaft 21, which is rotatably connected to the mounting base 10; a positioning member 30, which is fixedly connected to the rotating shaft 21 to rotate with the rotating shaft 21. The positioning member 30 is provided with a bracket positioning part 321 and a valve body positioning part 322. The bracket positioning part 321 and the valve body positioning part 322 are arranged along a first direction X and are used to position the bracket 200 and the valve body 300, respectively; a bracket clamping mechanism 40, which is connected to the positioning member 30 and is at least partially located on the side of the bracket positioning part 321 away from the valve body positioning part 322, and is used to drive the bracket 200 closer to the valve body 300; and a valve body clamping mechanism 50, which is connected to the positioning member 30 and is at least partially located on the side of the valve body positioning part 322 away from the bracket positioning part 321, and is used to drive the valve body 300 closer to the bracket 200.

[0031] In this embodiment, the rotating shaft 21 is rotatably connected to the mounting base 10, and the positioning member 30 is fixedly connected to the rotating shaft 21. The bracket positioning part 321 and the valve body positioning part 322 provided on the positioning member 30 can respectively position the bracket 200 and the valve body 300, and maintain the relative position between the bracket 200 and the valve body 300. Furthermore, the bracket clamping mechanism 40 can drive the bracket 200 to approach the valve body 300, and the valve body clamping mechanism 50 can drive the valve body 300 to approach the bracket 200. Under the double clamping action of the bracket clamping mechanism 40 and the valve body clamping mechanism 50, the bracket 200 and the valve body 300 can form a tight contact, which is beneficial to improving the accuracy of the welding position and the welding strength between the two. During the welding process, the rotating shaft 21 can drive the positioning member 30 to rotate, thereby realizing the joint rotation of the bracket 200 and the valve body 300 to cooperate with external welding equipment to complete the welding operation of the bracket 200 and the valve body 300. The welding auxiliary fixture 100 in this embodiment of the application realizes the rotation of the bracket 200 and valve body 300 during the welding process through the cooperation of the above-mentioned structure, and improves the welding accuracy and strength between the two, thereby ensuring the structural accuracy and structural strength of the electronic expansion valve and improving the consistency and stability of the welding quality of the electronic expansion valve.

[0032] Specifically, the mounting base 10 serves as the supporting structure of the entire welding fixture, providing a stable and reliable installation foundation for other mechanisms. The mounting base 10 itself has high rigidity, thereby ensuring that the entire welding auxiliary fixture 100 does not undergo overall deformation or vibration during the welding process between the bracket 200 and the valve body 300, thus guaranteeing welding accuracy. The rotating shaft 21, as a rotating motion component, is connected to and rotatably connected to the mounting base 10, enabling the positioning component 30, the bracket clamping mechanism 40, and the valve body clamping mechanism 50 connected thereon to rotate as a whole around the rotating shaft 21. In practical applications, the welding operation between the bracket 200 and the valve body 300 needs to be performed in the circumferential direction of the bracket 200 and the valve body 300. The position of the automated welding equipment is usually fixed. Therefore, through the design of the rotating shaft 21, the bracket positioning part 321 and the valve body positioning part 322 mounted on the positioning component 30, as well as the bracket 200 and the valve body 300, can rotate together with the rotating shaft 21. In this way, the welding equipment can maintain the optimal posture to complete the welding of all welds in the circumferential direction of the valve body 300 and the bracket 200, improving welding quality and operational convenience. Furthermore, the bracket 200 and the valve body 300 can complete multi-angle welding in one assembly, eliminating the need to adjust the position of the bracket 200 and the valve body 300 or the welding equipment, which is beneficial to improving welding efficiency.

[0033] The positioning component 30 serves as the initial installation and positioning structure for the bracket 200 and the valve body 300. It is equipped with a bracket positioning part 321 and a valve body positioning part 322. With the bracket positioning part 321 and the valve body positioning part 322 positioned along the first direction X, the bracket 200 and the valve body 300 are placed on the positioning component 30 and positioned by the bracket positioning part 321 and the valve body positioning part 322. This ensures that the bracket 200 and the valve body 300 are in a relative position along the first direction X before clamping, guaranteeing the relative positional accuracy of the bracket 200 and the valve body 300 after welding, avoiding welding deviations. Furthermore, with this positioning structure, each welded bracket 200 and valve body 300 are positioned using the same reference, reducing batch-to-batch quality inconsistencies during the mass production of electronic expansion valves. The structure of the bracket 200 is as follows: Figure 1 As shown, the bracket positioning part 321 can be designed according to the structure of the bracket 200. While not restricting the bracket 200 from moving closer to the valve body 300, it limits the circumferential freedom of the bracket 200 to prevent arbitrary rotation during the welding process between the bracket 200 and the valve body 300, which could cause deviation in the welding position. The structure of the valve body 300 is as follows: Figure 2As shown, the main body of the valve body 300 has a cylindrical structure. The bracket 200 is welded to the outer circumferential surface of the main body of the valve body 300. The valve body positioning part 322 is designed according to the characteristics of the main body of the valve body 300, for example, it is designed as a cylindrical positioning hole 3221, the diameter of which is adapted to the outer diameter of the valve body 300. The design of the bracket positioning part 321 and the valve body positioning part 322 allows the operator to quickly insert the bracket 200 and the valve body 300 respectively, simplifying the operation and positioning process.

[0034] The bracket clamping mechanism 40 is located on the side of the bracket positioning part 321 away from the valve body positioning part 322. When its power is applied to the bracket 200, it can drive the bracket 200 to move along the first direction X toward the valve body 300 and eventually make tight contact with the valve body 300. The valve body clamping mechanism 50 is located on the side of the valve body positioning part 322 away from the bracket positioning part 321. It has the same function as the bracket clamping mechanism 40. The valve body clamping mechanism 50 can drive the valve body 300 to move along the first direction X toward the bracket 200 and eventually make tight contact with the bracket 200. Through the bidirectional clamping action of the bracket clamping mechanism 40 and the valve body clamping mechanism 50, the bracket 200 and the valve body 300 can be clamped in opposite directions along the first direction X, avoiding deviation during the approach process and ensuring the welding accuracy of the bracket 200 and the valve body 300.

[0035] Optionally, the bracket clamping mechanism 40 includes a first guide shaft 41, a first clamping member 42, a first spring 43, and a first limiting member 44. The first guide shaft 41 passes through the positioning member 30 along the first direction X. The first clamping member 42 is connected to one end of the first guide shaft 41 near the bracket positioning part 321. The first limiting member 44 is connected to the other end of the first guide shaft 41. The first spring 43 is sleeved on the first guide shaft 41 and is located between the positioning member 30 and the first limiting member 44. Under the action of the elastic restoring force of the first spring 43, the first clamping member 42 has a tendency to move closer to the bracket positioning part 321.

[0036] In this embodiment, the bracket clamping mechanism 40 simplifies its structure through the cooperation of the first guide shaft 41, the first clamping member 42, the first spring 43, and the first limiting member 44. The clamping process of the bracket 200 is achieved by the first spring 43. The first spring 43 drives the first limiting member 44 to move away from the positioning member 30 according to its own elastic restoring force, and drives the first guide shaft 41 to move to the right along the first direction X. Figure 3 The movement of the right side of the bracket 200 causes the first clamping member 42 located on the other side of the positioning member 30 to be subjected to a continuous and adaptive elastic clamping force toward the bracket positioning part 321. During the welding process between the bracket 200 and the valve body 300, this mechanical clamping is simpler and more reliable than the method of using an external drive source to drive the first clamping member 42 to clamp the bracket 200.

[0037] Specifically, the bracket positioning part 321 is used to set the bracket 200. When the first clamping member 42 has a tendency to move closer to the bracket positioning part 321, the first clamping member 42 actually moves toward the bracket 200 in the bracket positioning part 321 and drives the bracket 200 closer to the valve body 300. The first guide shaft 41 passes through the positioning member 30 along the first direction X, providing strict movement guidance along the first direction X for the entire bracket clamping mechanism 40, ensuring the direction of the elastic restoring force of the first spring 43 and the clamping direction of the first clamping member 42, and preventing the bracket 200 from deviating from its movement trajectory during the process of approaching the valve body 300. The first limiting member 44 is connected to the first guide shaft 41, forming an installation space for the first spring 43 between itself and the positioning member 30, so that the first spring 43 has an initial elastic force. The first spring 43 serves as the direct power source for driving the support 200 to move closer to the valve body 300. One end of the spring abuts against the positioning member 30, and the other end abuts against the first limiting member 44. The positioning member 30 is connected to the mounting base 10 and is fixed in position. Its elastic restoring force pushes the first limiting member 44 to move away from the positioning member 30. The first guide shaft 41 moves to the right under the pulling action of the first limiting member 44. During this process, the first clamping member 42 connected to the first guide shaft 41, as a component that directly performs the clamping function on the support 200, converts the elastic restoring force from the first spring 43 into an elastic clamping force toward the support 200, generating a tendency to move toward the support positioning part 321, thereby driving the support 200 to clamp the valve body 300. Furthermore, during the welding process between the bracket 200 and the valve body 300, when the bracket 200 or the valve body 300 undergoes slight deformation due to factors such as welding heat deformation, the first spring 43 maintains the clamping force of the first clamping member 42 on the bracket 200 through its own elastic restoring force, thereby achieving dynamic clamping of the bracket 200 and preventing loosening of contact between the bracket 200 and the valve body 300 due to slight changes in size, thus ensuring welding accuracy and reliability.

[0038] In specific applications, such as Figure 3 , Figure 4 as well as Figure 7 In the indicated orientation, the operator can manually push the first limiting member 44 to the left along the first direction X from the right side of the fixture, or manually pull the first clamping member 42 to the left along the first direction X from the left side of the fixture. During the above operations, the first clamping member 42 overcomes the elastic restoring force of the first spring 43 and moves away from the bracket positioning part 321. Then, the operator can place the bracket 200 to be welded into the bracket positioning part 321, or remove the welded bracket 200 from the positioning member 30. It should be noted that, in order to further improve the automation level of the welding auxiliary fixture 100 in this embodiment, an automated driving component can also be set to complete the above operations.

[0039] In this embodiment of the application, the number of first guide shafts 41 can be set to two. The two first guide shafts 41 are spaced apart on both sides of the bracket positioning part 321 along the second direction. A first spring 43 is sleeved on one first guide shaft 41. The first clamping member 42 is connected to both first guide shafts 41 at the same time. In this way, the stability of the first clamping member 42 when it moves close to the bracket positioning part 321 is better.

[0040] Optionally, the bracket clamping mechanism 40 further includes a first driving member 45, the output end of which is connected to at least one of the first clamping member 42 and the first limiting member 44. The first driving member 45 is used to drive the first guide shaft 41 to move along the first direction X and compress the first spring 43 so that the first spring 43 generates an elastic restoring force.

[0041] It should be noted that manual operation is inefficient and laborious when the spring force of the first spring 43 is large. In this embodiment, a first driving member 45 is provided in the bracket clamping mechanism 40, and the output end of the first driving member 45 is connected to at least one of the first clamping member 42 and the first limiting member 44. When the first driving member 45 is working, at least one of the first clamping member 42 and the first limiting member 44 can be driven to move along the first direction X, and the first spring 43 is compressed, which improves the convenience and efficiency of the bracket 200 insertion and removal process and reduces labor costs.

[0042] In some optional embodiments of this application, such as Figure 4 As shown, the first driving member 45 is connected to the first limiting member 44. When it is necessary to place or remove the bracket 200, the first driving member 45 is activated. The driving force of the first driving member 45 acts directly to the left on the first limiting member 44. The first limiting member 44 overcomes the elastic restoring force of the first spring 43 and moves to the left, causing the first guide shaft 41 to move to the left. The first clamping member 42 retracts relative to the positioning member 30 (away from the bracket positioning part 321). Simultaneously, the first spring 43 is further compressed between the positioning member 30 and the first limiting member 44, storing more elastic potential energy. When the bracket 200 is in place, the first driving member 45 is closed. The highly compressed first spring 43 releases its stored potential energy, generating a strong elastic restoring force. Through the first limiting member 44 and the first guide shaft 41, it quickly drives the first clamping member 42 to clamp the bracket 200 towards the valve body 300. During this process, the first driving member 45 does not intervene; the elastic clamping force on the bracket 200 mainly comes from the first spring 43.

[0043] In some alternative embodiments of this application, the first driving member 45 is connected to the first clamping member 42. In this case, if it is necessary to place or remove the bracket 200, the first driving member 45 is activated. The driving force of the first driving member 45 acts directly to the left on the first clamping member 42. The first clamping member 42 moves to the left against the elastic restoring force of the first spring 43, driving the first guide shaft 41 to move to the left while retracting relative to the positioning member 30 (away from the bracket positioning part 321). At the same time, the first spring 43 is further compressed between the positioning member 30 and the first limiting member 44, storing more elastic potential energy. The clamping process of the mechanism on the bracket 200 after the bracket 200 is placed in place is as described above, and will not be repeated here.

[0044] Optionally, the first clamping member 42 includes a connecting part 421 and a clamping part 422. The connecting part 421 and the clamping part 422 are arranged at an angle. The connecting part 421 is used to connect with the first guide shaft 41. The clamping part 422 is provided with an arc-shaped mating surface 4221, which is used to abut against the bracket 200.

[0045] It should be noted that in this embodiment, both the bracket clamping mechanism 40 and the valve body clamping mechanism 50 are connected to the positioning member 30. The bracket positioning part 321 and the valve body positioning part 322 are arranged on the positioning member 30 along the first direction X. The bracket clamping mechanism 40 and the valve body clamping mechanism 50 are respectively used to drive the bracket 200 and the valve body 300 to move closer to each other along the first direction X. In the height direction of the positioning member 30, the bracket clamping mechanism 40 and the valve body clamping mechanism 50 may interfere with each other. In this embodiment, by setting the first clamping member 42 as a connecting part 421 and a clamping part 422 connected at an angle, the first clamping member 42 is connected to the first guide shaft 41 through the connecting part 421 and abuts against the bracket 200 through the clamping part 422, thus achieving avoidance with the valve body clamping mechanism 50 and avoiding possible interference with the valve body clamping mechanism 50.

[0046] In specific applications, the first clamping member 42 is generally L-shaped. The connecting part 421 is arranged roughly parallel to the side of the positioning member 30. The connecting part 421 is provided with a mounting hole, through which the first guide shaft 41 can pass and connect with the connecting part 421. The mounting hole on the connecting part 421 can be a threaded hole, keyway, pin hole, etc. The specific connection method between the connecting part 421 and the first guide shaft 41 is not limited in this embodiment. The clamping part 422 is arranged at a right angle to the connecting part 421 and is roughly parallel to the upper surface of the positioning member 30. During the movement of the connecting part 421 along the first direction X with the first guide shaft 41, the clamping part 422 follows the movement of the connecting part 421 to move closer to or away from the bracket positioning part 321, thereby driving the bracket 200 on the bracket positioning part 321 to move closer to or away from the valve body 300. Figure 8As shown, the arc-shaped mating surface 4221 provided on the clamping part 422 and... Figure 1 The outer peripheral surface of the bracket 200 shown ( Figure 1 (Middle left) Adapted, when the clamping part 422 clamps the outer peripheral surface of the bracket 200, the arc-shaped mating surface 4221 can also limit the rotation of the bracket 200 along the circumference of the valve body 300 to a certain extent, ensuring the welding accuracy between the bracket 200 and the valve body 300. In practical applications, the connecting part 421 and the clamping part 422 are integrally formed to ensure that the connecting part 421 can stably and reliably transmit the driving force from the first guide shaft 41 to the clamping part 422. Alternatively, the connecting part 421 and the clamping part 422 can be processed and manufactured separately and then connected into one piece by welding or bonding in the later stage.

[0047] like Figure 8 As shown, the mounting hole is located in the lower half of the connecting part 421. The upper half of the connecting part 421 is hollowed out on both sides, leaving only the middle part to connect with the clamping part 422. The hollowed-out parts on both sides can be used to achieve the avoidance function between the clamping mechanism 50 and the valve body.

[0048] Optionally, the bracket clamping mechanism 40 further includes a pressure plate 46 connected to the positioning member 30 and extending at least partially above the first clamping member 42, the pressure plate 46 being used to limit the first clamping member 42.

[0049] In this embodiment, the pressure plate 46 extends at least partially above the first clamping member 42 to provide the first clamping member 42 with a constraint and limit perpendicular to the first direction X, preventing the first clamping member 42 from tilting up and causing clamping failure of the bracket 200. Furthermore, the setting of the pressure plate 46 can also restrict the movement freedom of the first clamping member 42 other than the first direction X, ensuring the positioning accuracy of the clamping action of the first clamping member 42 on the bracket 200, and ensuring the reliability of the movement of the clamping and positioning mechanism of the bracket 200.

[0050] Specifically, such as Figure 9 , Figure 10 As shown, the pressure plate 46 is roughly inverted L-shaped, with one side fixedly connected to the side of the positioning member 30, and the other side located above the clamping portion 422 of the first clamping member 42. Further, as... Figure 8 As shown, in this embodiment of the application, the upper surface of the clamping part 422 of the first clamping member 42 is provided with a recess 4222. The recess 4222 is located on the side of the clamping part 422 away from the arc-shaped mating surface 4221 along the first direction X. A boss 4223 is formed on the side of the clamping part 422 close to the arc-shaped mating surface 4221. The pressure plate 46 is located above the recess 4222 and has a clearance fit with the surface of the recess 4222. During the process of the first clamping member 42 retracting relative to the positioning member 30 along the first direction X (away from the bracket positioning part 321), the pressure plate 46 can also move by contacting the outer side of the boss 4223 ( Figure 8 The pressure plate 46 abuts against the left side of the bracket to limit the first clamping member 42 from moving further away from the bracket positioning part 321. At this time, the pressure plate 46 can act as a limiting structure for the maximum backward stroke of the first clamping member 42. While ensuring that the first clamping member 42 releases its clamping effect on the bracket 200, it avoids the excessive stroke of the first limiting member 44, the first guide shaft 41, the first spring 43 and the first clamping member 42 in the bracket clamping mechanism 40, thereby improving the working efficiency of the bracket clamping mechanism 40.

[0051] Optionally, the valve body clamping mechanism 50 includes a second guide shaft 51, a second clamping member 52, a second spring 53, and a second limiting member 54. The second guide shaft 51 passes through the positioning member 30 along the first direction X. The second clamping member 52 is connected to one end of the second guide shaft 51 near the valve body positioning part 322. The second limiting member 54 is connected to the other end of the second guide shaft 51. The second spring 53 is connected to the second guide shaft 51 and is located between the positioning member 30 and the second limiting member 54. Under the action of the elastic restoring force of the second spring 53, the second clamping member 52 has a tendency to move closer to the valve body positioning part 322.

[0052] In this embodiment, the valve body clamping mechanism 50 simplifies its structure through the cooperation of the second guide shaft 51, the second clamping member 52, the second spring 53, and the second limiting member 54. The clamping process of the valve body 300 is achieved by the second spring 53. The second spring 53 drives the second limiting member 54 to move away from the positioning member 30 according to its own elastic restoring force, and drives the second guide shaft 51 to move to the left along the first direction X. Figure 3 The movement of the left side of the valve body causes the second clamping member 52, located on the other side of the positioning member 30, to be subjected to a continuous and adaptive elastic clamping force toward the valve body positioning part 322. During the welding process of valve body 300 and valve body 300, this mechanical clamping is simpler and more reliable than the method of driving the second clamping member 52 to clamp the valve body 300 by an external drive source.

[0053] Specifically, the valve body positioning part 322 is used to position the valve body 300. When the second clamping member 52 has a tendency to move closer to the valve body positioning part 322, the second clamping member 52 actually moves towards the valve body 300 in the valve body positioning part 322 and drives the valve body 300 closer to the bracket 200. The second guide shaft 51 passes through the positioning member 30 along the first direction X, providing strict movement guidance along the first direction X for the entire valve body clamping mechanism 50, ensuring the direction of the elastic restoring force of the second spring 53 and the clamping direction of the second clamping member 52, and preventing the valve body 300 from deviating from its movement trajectory during the process of approaching the bracket 200. The second limiting member 54 is connected to the second guide shaft 51, forming an installation space for the second spring 53 between itself and the positioning member 30, so that the second spring 53 has an initial elastic force. The second spring 53 serves as the direct power source for driving the valve body 300 closer to the valve body 300. One end of the spring abuts against the positioning member 30, and the other end abuts against the second limiting member 54. The positioning member 30 is connected to the mounting base 10 and is fixed in position. Its elastic restoring force pushes the second limiting member 54 to move away from the positioning member 30. The second guide shaft 51 moves to the left under the pulling action of the second limiting member 54. During this process, the second clamping member 52 connected to the second guide shaft 51, as a component that directly performs the clamping function on the valve body 300, converts the elastic restoring force from the second spring 53 into an elastic clamping force toward the valve body 300, generating a tendency to move toward the valve body positioning part 322, thereby driving the valve body 300 closer to the bracket 200. Furthermore, during the welding process of valve bodies 300 and valve bodies 300, when valve bodies 300 or valve bodies 300 undergo slight deformation due to factors such as welding heat deformation, the second spring 53 maintains the clamping force of the second clamping member 52 on the valve body 300 through its own elastic restoring force, thereby achieving dynamic clamping of the valve body 300 and preventing loosening of contact between the valve body 300 and the bracket 200 due to slight changes in size, thus ensuring welding accuracy and reliability.

[0054] In specific applications, such as Figure 3 , Figure 4 as well as Figure 7 In the indicated orientation, the operator can manually pull the second limiting member 54 to the left along the first direction X from the left side of the fixture, or manually pull the second clamping member 52 to the right along the first direction X from the right side of the fixture. During the above operation, the second clamping member 52 overcomes the elastic restoring force of the second spring 53 and moves away from the valve body positioning part 322. Then, the operator can place the valve body 300 to be welded into the valve body positioning part 322, or remove the welded valve body 300 from the positioning member 30. It should be noted that, in order to further improve the automation level of the welding auxiliary fixture 100 in this embodiment, an automated drive unit can also be set to complete the above operation.

[0055] In this embodiment, the number of second guide shafts 51 can be set to two. The two second guide shafts 51 are spaced apart on both sides of the valve body positioning part 322 along the second direction. A second spring 53 is sleeved on one second guide shaft 51. The second clamping member 52 is connected to both second guide shafts 51 at the same time. In this way, the stability of the second clamping member 52 when it moves close to the valve body positioning part 322 is better.

[0056] Optionally, the valve body clamping mechanism 50 further includes a second driving member 55. The output end of the second driving member 55 is connected to at least one of the second clamping member 52 and the second limiting member 54. The second driving member 55 is used to drive the second guide shaft 51 to move along the first direction X and compress the second spring 53 so that the second spring 53 generates an elastic restoring force.

[0057] It should be noted that manual operation is inefficient and laborious when the second spring 53 has a large elastic force. In this embodiment, a second driving member 55 is provided in the valve body clamping mechanism 50, and the output end of the second driving member 55 is connected to at least one of the second clamping member 52 and the second limiting member 54. When the second driving member 55 is working, at least one of the second clamping member 52 and the second limiting member 54 can be driven to move along the first direction X, and the second spring 53 is compressed, which improves the convenience and efficiency of the valve body 300 loading and unloading process and reduces labor costs.

[0058] In some optional embodiments of this application, such as Figure 4 As shown, the second driving member 55 is connected to the second clamping member 52. When it is necessary to place or remove the valve body 300, the second driving member 55 is activated. The driving force of the second driving member 55 acts directly to the right on the second clamping member 52. The second clamping member 52 overcomes the elastic restoring force of the second spring 53 and moves to the right, driving the second guide shaft 51 to move to the right. The second clamping member 52 retracts relative to the positioning member 30 (away from the valve body positioning part 322). Simultaneously, the second spring 53 is further compressed between the positioning member 30 and the second limiting member 54, storing more elastic potential energy. When the valve body 300 is in place, the second driving member 55 is closed. The highly compressed second spring 53 releases its stored potential energy, generating a strong elastic restoring force. Through the second limiting member 54 and the second guide shaft 51, it quickly drives the second clamping member 52 to clamp the valve body 300 against the bracket 200. During this process, the second driving member 55 does not intervene; the elastic clamping force on the valve body 300 mainly comes from the second spring 53.

[0059] In some alternative embodiments of this application, the second driving member 55 is connected to the second limiting member 54. In this case, if it is necessary to place or remove the valve body 300, the second driving member 55 is activated. The driving force of the second driving member 55 acts directly to the right on the second limiting member 54. Similar to the movement process of the first clamping member 42, the second clamping member 52 moves to the right against the elastic restoring force of the second spring 53, driving the second guide shaft 51 to move to the right while retracting relative to the positioning member 30 (away from the valve body positioning part 322). At the same time, the second spring 53 is further compressed between the positioning member 30 and the second limiting member 54, storing more elastic potential energy. The clamping process of the mechanism on the valve body 300 after the valve body 300 is placed in place is as described above, and will not be repeated here.

[0060] Optionally, the positioning component 30 includes a positioning component body 32 and a positioning component seat 31. The positioning component seat 31 is fixedly connected to the rotating shaft 21 and is provided with a positioning component body mounting groove. The positioning component body 32 is fixedly connected in the positioning component body mounting groove. The bracket positioning part 321 and the valve body positioning part 322 are provided on the positioning component body 32. The bracket clamping mechanism 40 and the valve body clamping mechanism 50 are both connected to the positioning component seat 31.

[0061] The positioning component body 32 and the positioning component seat 31 are separate structures, assembled during use. The positioning component seat 31 is fixedly connected to the rotating shaft 21 and can rotate synchronously with the rotating shaft 21. A shim 311 can be provided between the positioning component seat 31 and the rotating shaft 21 to adjust the height of the positioning component seat 31 to adapt to the position of the welding equipment. The shim 311 and the rotating shaft 21, as well as the shim 311 and the positioning component seat 31, can be connected by screws and pins. The positioning component seat 31 is provided with a positioning component body mounting groove, which can serve as the mounting base for the positioning component body 32, ensuring the stability of the positioning component body 32 during the rotational welding process. The positioning component body 32 is designed with a bracket positioning part 321 and a valve body positioning part 322 adapted to the bracket 200 and valve body 300, respectively. During the rotation with the positioning component seat 31, the relative positions of the bracket 200 and valve body 300 set in the bracket positioning part 321 and valve body positioning part 322 are further ensured. Figure 11 As shown, the upper surface of the positioning component body 32 is stepped, and the bracket positioning part 321 is disposed on the stepped upper surface of the positioning component body 32 to accommodate the welding height of the bracket 200 and the valve body 300.

[0062] In practical applications, the bracket positioning part 321 and valve body positioning part 322 on the positioning part body 32 can be designed according to the specific bracket 200 and valve body 300 model specifications to meet the welding between different types of bracket 200 and valve body 300, thereby improving the overall versatility of the welding auxiliary tooling 100; the overall external dimensions of the positioning part 30 are adapted to the positioning part body mounting groove of the positioning part seat 31 so that different positioning part bodies 32 can be connected and installed with the positioning part seat 31. Both the bracket clamping mechanism 40 and the valve body clamping mechanism 50 are connected to the positioning base 31. The bracket clamping mechanism 40 and the valve body clamping mechanism 50 are universal components that are compatible with all specifications and models of brackets 200 and valve bodies 300. Therefore, when the bracket clamping mechanism 40 and the valve body clamping mechanism 50 are connected to the positioning base 31, the positioning base 31, the bracket clamping mechanism 40, and the valve body clamping mechanism 50 can be reused directly without replacement. Only the positioning body 32 needs to be replaced so that the welding auxiliary tooling 100 can be used for various specifications and models of electronic expansion valves.

[0063] like Figure 11 The diagram shown is a structural schematic of the positioning body 32 in the embodiment of this application. The bracket positioning part 321 is a positioning protrusion 3211, which protrudes from the upper surface of the positioning body 32 and is used to abut against the bracket 200. The valve body positioning part 322 is a positioning hole 3221.

[0064] In this embodiment, the positioning protrusion 3211 protrudes from the upper surface of the positioning member body 32. When the bracket 200 is installed on the bracket positioning part 321, the positioning protrusion 3211 can provide the bracket 200 with limiting along the first direction X and along the circumferential direction, ensuring the positioning accuracy between the bracket 200 and the valve body 300. When the valve body positioning part 322 is set as the positioning hole 3221, it is convenient to install the valve body 300.

[0065] Specifically, such as Figure 1 As shown, the inner side of the bracket 200 (right side in the figure) includes two spaced-apart welding surfaces, with a notch formed between them. The positioning protrusion 3211 can be designed to have a similar curvature to the inner notch of the bracket 200. In practical applications, when the bracket clamping mechanism 40 drives the bracket 200 closer to the valve body 300, the notch and the positioning protrusion 3211 are opposite to and approach each other along the first direction X, such as... Figure 10 As shown, when the notch abuts against the positioning protrusion 3211, the positioning protrusion 3211 restricts the bracket 200 from continuing to approach the valve body 300 along the first direction X. At the same time, the two welding surfaces of the bracket 200 near the notch abut against the positioning protrusion 3211 on both sides along the circumferential direction, thereby restricting the bracket 200's degree of freedom in the circumferential direction.

[0066] like Figure 7 As shown, the positioning member 30 also includes a height adjustment member 33, which is disposed in the positioning hole 3221.

[0067] It should be understood that valve bodies 300 of different specifications and models may have the same diameter but different heights. When the diameter is different, the positioning element body 32 can be replaced to adapt to valve bodies 300 of different diameters. When the valve bodies 300 have the same diameter but different heights, height adjustment elements 33 of different heights can be added in the positioning hole 3221 to further improve the universality of the positioning element body 32 with the same positioning hole 3221 diameter to valve bodies 300 of different heights. In this way, the replacement frequency of the positioning element body 32 is reduced, the operation process is simplified, and the downtime caused by the replacement of parts is reduced.

[0068] In addition, since the valve body 300, bracket 200, positioning component body 32 and other structures may have manufacturing tolerances due to processing limitations, and the positioning component body 32 may also wear after long-term use, these factors will cause the welding position between the bracket 200 and the valve body 300 to deviate, affecting the welding accuracy. In this embodiment, by setting the height adjustment component 33, the above-mentioned manufacturing or wear tolerances can also be compensated.

[0069] like Figure 7 As shown, the positioning hole 3221 is a through hole, and the positioning component seat 31 and the rotating shaft 21 are respectively provided with a first exhaust hole 331 and a second exhaust hole 214. The positioning hole 3221 is connected to the first exhaust hole 331 and the second exhaust hole 214.

[0070] In this embodiment, by setting the positioning hole 3221 as a through hole and connecting the positioning hole 3221 with the first exhaust hole 331 and the second exhaust hole 214, exhaust can be performed during the process of installing the valve body 300 or the height adjustment component 33 into the positioning hole 3221, thereby reducing the pressure inside the positioning hole 3221 and minimizing the impact of the air pressure inside the positioning hole 3221 on the welding position between the valve bodies 300, thus ensuring the accuracy of the welding position.

[0071] Optionally, the welding auxiliary tooling 100 also includes a rotary positioning mechanism 60, which is connected to the mounting base 10. The rotary positioning mechanism 60 is provided with a first positioning part 641, and the rotating shaft 21 is provided with a second positioning part 2111. The first positioning part 641 and the second positioning part 2111 cooperate to restrict the rotation of the rotating shaft 21.

[0072] It should be noted that in practical applications, the weld seam at the welding position of the bracket 200 and the valve body 300 is along the circumference of the valve body 300. During the welding process, the rotating shaft 21 keeps rotating so that the welding position is always opposite to the welding equipment, which improves the welding convenience. When preparing for welding and when the tooling is in a stopped state after welding, it is desirable for the rotating shaft 21 to remain stable. For example, during the pre-welding preparation process, the bracket 200 and valve body 300 need to be assembled onto the bracket positioning part 321 and valve body positioning part 322 respectively. If the rotation of the rotating shaft 21 is unrestricted, it is not convenient for automated assembly, and assembly deviation may occur, increasing the rework rate and reducing the welding efficiency of the bracket 200 and valve body 300. When the positioning part body 32 needs to be replaced for different specifications of valve body 300, the stability of the rotating shaft 21 will also affect the replacement efficiency of the positioning part body 32. In addition, when the tooling is in a stopped state, if the rotation of the rotating shaft 21 is not limited, the rotating shaft 21 may rotate randomly, causing wear and tear on the parts and affecting the service life and reliability of the welding auxiliary tooling 100. In this embodiment, by setting a rotary positioning mechanism 60, the first positioning part 641 of the rotary positioning mechanism 60 can be positioned and engaged with the second positioning part 2111 on the rotary shaft 21 when needed, so as to restrict the rotation of the rotary shaft 21, thereby ensuring the efficiency and accuracy of the pre-welding preparation work, and preventing wear caused by the random rotation of the rotary shaft 21 when the tooling is stopped. In this way, the welding efficiency of the bracket 200 and the valve body 300 is improved, and the service life of the tooling is extended.

[0073] Specifically, the rotating shaft 21 may include a support portion 211, a shaft body 212, and a locking member 213. The support portion 211 is a flat plate structure, and the shaft body 212 is a cylindrical structure. The shaft body 212 is connected below the support portion 211 and is rotatably connected to the mounting base 10. The support portion 211 is located on the upper surface of the mounting base 10 and is used to support the positioning member 30. The second positioning portion 2111 is disposed on the support portion 211, and the locking member 213 is locked to the shaft body 212 from below the mounting base 10. One of the first positioning portion 641 and the second positioning portion 2111 is a limiting groove, and the other of the first positioning portion 641 and the second positioning portion 2111 is a limiting protrusion. The limiting protrusion at least partially extends into the limiting groove to limit the rotation of the rotating shaft 21. For example, in the embodiments of this application, such as Figure 12 As shown, the limiting groove is a V-shaped groove and is located on the rotating shaft 21, as... Figure 13 As shown, the limiting protrusion is a V-shaped protrusion and is provided on the rotating positioning member 64. When the first positioning part 641 and the second positioning part 2111 are in limiting engagement, the groove wall of the V-shaped groove can provide a certain guiding effect on the sharp corner of the V-shaped protrusion, making the positioning engagement process between the two smoother, effectively avoiding positioning jamming, and improving the positioning engagement efficiency.

[0074] like Figure 3 As shown, the rotary positioning mechanism 60 includes a rotary positioning seat 61, a third guide shaft 62, a third spring 63, and a rotary positioning member 64. The rotary positioning seat 61 is fixedly connected to the mounting base 10. Both ends of the third guide shaft 62 are fixedly connected to the rotary positioning seat 61. The third spring 63 and the rotary positioning member 64 are both sleeved on the third guide shaft 62. The first positioning part 641 is disposed on the rotary positioning member 64. Under the action of the elastic restoring force of the third spring 63, the rotary positioning member 64 has a tendency to move closer to the rotary shaft 21.

[0075] In this embodiment, the structure of the rotary positioning mechanism 60 is simplified by the cooperation of the rotary positioning seat 61, the third guide shaft 62, the third spring 63, and the rotary positioning member 64. The positioning process of the rotary shaft 21 is realized by the third spring 63. The third spring 63 drives the rotary positioning member 64 to approach the rotary shaft 21 according to its own elastic restoring force, so as to realize the positioning cooperation between the first positioning part 641 and the second positioning part 2111. This mechanical cooperation structure is simpler and more reliable, ensuring the rotational positioning effect of the rotary shaft 21.

[0076] The rotating positioning seat 61 is connected to the mounting seat 10 and can serve as the mounting base for the third guide shaft 62. It includes two vertical plates arranged opposite each other. The two ends of the third guide shaft 62 are respectively connected to the two vertical plates. The third spring 63 is sleeved on the third guide shaft 62. The rotating positioning member 64 is also sleeved on the third guide shaft 62 and is located between the vertical plate near the rotating shaft 21 and the third spring 63. The third spring 63 stores elastic potential energy due to the constraint between the rotating positioning member 64 and the vertical plate near the rotating shaft 21, and drives the rotating positioning member 64 to move towards the rotating shaft 21 along the axial direction of the third guide shaft 62.

[0077] Optionally, the rotary positioning mechanism 60 further includes a third driving member 65, the output end of which is connected to the rotary positioning member 64. The third driving member 65 is used to drive the rotary positioning member 64 away from the rotation axis 21 so that the first positioning part 641 is separated from the second positioning part 2111.

[0078] During the welding process between the bracket 200 and the valve body 300, the rotating shaft 21 needs to remain rotating. Therefore, the rotating positioning member 64 does not need to engage with the rotating shaft 21. In this embodiment, by providing a third driving member 65 in the rotating positioning mechanism 60, with its output end connected to the rotating positioning member 64, the first driving member 45 can be activated when there is no need to restrict the rotation of the rotating shaft 21. This applies a driving force to the rotating positioning member 64 towards the side away from the rotating shaft 21, keeping the first positioning part 641 and the second positioning part 2111 separated. This improves the convenience and efficiency of the positioning process for the rotating shaft 21 and reduces labor costs.

[0079] Specifically, such as Figure 3 As shown, the axial direction of the third guide shaft 62 is set along the first direction X, as... Figure 4 As shown, the third drive member 65 is connected to the rotary positioning member 64 and is used to apply force to the rotary positioning member 64 away from the rotation axis 21. Figure 4 The driving force (from center to right).

[0080] like Figure 3 As shown, the mounting base 10 in this embodiment includes a mounting plate 11, a bearing housing 12, and a bearing 13. The bearing housing 12 is connected to the mounting plate 11, the outer ring of the bearing 13 is fixedly connected to the bearing housing 12, and the inner ring of the bearing 13 is fixedly connected to the rotating shaft 21. The rotating mechanism 20 also includes a fourth driving member 22, which is connected to the rotating shaft 21 and used to drive the rotating shaft 21 to rotate around its circumference.

[0081] Understandably, with the rotating shaft 21 rotatably connected to the mounting plate 11 via the bearing 13 and bearing housing 12, the rotation of the rotating shaft 21 is smoother and wear during rotation is reduced. Furthermore, by providing a fourth driving component 22 to drive the rotating shaft 21, the automation of the welding auxiliary tooling 100 is further enhanced, which is beneficial for improving welding efficiency and reducing labor costs. It should be noted that the bearing housing 12 and bearing 13 can be selected from existing structures; the structure of the bearing housing 12 and bearing 13 will not be described in detail in this application.

[0082] The working principle of the welding auxiliary tooling 100 in the embodiments of this application is illustrated below: S1. Rotary shaft 21 positioning: The fourth driving component 22 is closed, and the third spring 63 drives the rotary positioning component 64 to position and cooperate with the rotary shaft 21 to prevent it from rotating freely. S2. Assembly of bracket 200 and valve body 300: Select a positioning component body 32 and a height adjustment component 33 that are compatible with the valve body 300, and assemble them with the positioning component seat 31. Then, assemble the bracket 200 and the valve body 300 onto the bracket positioning part 321 and the valve body positioning part 322 on the positioning component body 32. During this process, keep the first driving component 45 and the second driving component 55 open, which are used to keep the first clamping component 42 and the second clamping component 52 away from the bracket positioning part 321 and the valve body positioning part 322, respectively, to avoid interference with the assembly of the bracket 200 and the valve body 300. S3, bracket 200, valve body 300 positioning: the first drive member 45 and the second drive member 55 are closed, and the bracket 200 and valve body 300 approach each other and make close contact under the action of the first spring 43 and the second spring 53 respectively; S4. Welding operation: Start the fourth drive unit 22 to drive the rotating shaft 21 to rotate. Weld the bracket 200 and the valve body 300 together along the circumference of the valve body 300 using the welding equipment. After welding is completed, turn off the fourth drive unit 22 and repeat the above operation, or stop the tooling.

[0083] In summary, the welding auxiliary tooling 100 provided in this application embodiment may include at least the following advantages: In this embodiment, the rotating shaft 21 is rotatably connected to the mounting base 10, and the positioning member 30 is fixedly connected to the rotating shaft 21. The bracket positioning part 321 and the valve body positioning part 322 provided on the positioning member 30 can respectively position the bracket 200 and the valve body 300, and maintain the relative position between the bracket 200 and the valve body 300. Furthermore, the bracket clamping mechanism 40 can drive the bracket 200 to approach the valve body 300, and the valve body clamping mechanism 50 can drive the valve body 300 to approach the bracket 200. Under the double clamping action of the bracket clamping mechanism 40 and the valve body clamping mechanism 50, the bracket 200 and the valve body 300 can form a tight contact, which is beneficial to improving the accuracy of the welding position and the welding strength between the two. During the welding process, the rotating shaft 21 can drive the positioning member 30 to rotate, thereby realizing the joint rotation of the bracket 200 and the valve body 300 to cooperate with external welding equipment to complete the welding operation of the bracket 200 and the valve body 300. The welding auxiliary fixture 100 in this embodiment of the application realizes the rotation of the bracket 200 and valve body 300 during the welding process through the cooperation of the above-mentioned structure, and improves the welding accuracy and strength between the two, thereby ensuring the structural accuracy and structural strength of the electronic expansion valve and improving the consistency and stability of the welding quality of the electronic expansion valve.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0085] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A welding auxiliary tooling, characterized in that, include: A mounting base and a rotating mechanism, the rotating mechanism including a rotating shaft rotatably connected to the mounting base; A positioning component is fixedly connected to the rotating shaft to rotate with the rotating shaft. The positioning component is provided with a bracket positioning part and a valve body positioning part. The bracket positioning part and the valve body positioning part are arranged along a first direction and are used to position the bracket and the valve body respectively. A bracket clamping mechanism is connected to the positioning member and is at least partially located on the side of the bracket positioning portion away from the valve body positioning portion, and is used to drive the bracket closer to the valve body; A valve body clamping mechanism is connected to the positioning member and is at least partially located on the side of the valve body positioning portion away from the bracket positioning portion, and is used to drive the valve body closer to the bracket.

2. The welding auxiliary tooling according to claim 1, characterized in that, The bracket clamping mechanism includes a first guide shaft, a first clamping member, a first spring, and a first limiting member. The first guide shaft passes through the positioning member along the first direction. The first clamping member is connected to one end of the first guide shaft near the positioning part of the bracket. The first limiting member is connected to the other end of the first guide shaft. The first spring is sleeved on the first guide shaft and located between the positioning member and the first limiting member. Under the action of the elastic restoring force of the first spring, the first clamping member has a tendency to move closer to the positioning part of the bracket.

3. The welding auxiliary tooling according to claim 2, characterized in that, The bracket clamping mechanism further includes a first driving member, the output end of which is connected to at least one of the first clamping member and the first limiting member. The first driving member is used to drive the first guide shaft to move along the first direction and compress the first spring so that the first spring generates an elastic restoring force.

4. The welding auxiliary tooling according to claim 2, characterized in that, The first clamping member includes a connecting part and a clamping part. The connecting part and the clamping part are arranged at an angle. The connecting part is used to connect with the first guide shaft. The clamping part is provided with an arc-shaped mating surface, which is used to abut against the bracket.

5. The welding auxiliary tooling according to claim 2, characterized in that, The bracket clamping mechanism further includes a pressure plate connected to the positioning member and extending at least partially above the first clamping member, the pressure plate being used to limit the first clamping member.

6. The welding auxiliary tooling according to claim 1, characterized in that, The valve body clamping mechanism includes a second guide shaft, a second clamping member, a second spring, and a second limiting member. The second guide shaft passes through the positioning member along the first direction. The second clamping member is connected to one end of the second guide shaft near the valve body positioning part. The second limiting member is connected to the other end of the second guide shaft. The second spring is connected to the second guide shaft and is located between the positioning member and the second limiting member. Under the action of the elastic restoring force of the second spring, the second clamping member has a tendency to move closer to the valve body positioning part.

7. The welding auxiliary tooling according to claim 6, characterized in that, The valve body clamping mechanism further includes a second driving member, the output end of which is connected to at least one of the second clamping member and the second limiting member. The second driving member is used to drive the second guide shaft to move along the first direction and compress the second spring so that the second spring generates an elastic restoring force.

8. The welding auxiliary tooling according to claim 1, characterized in that, The positioning component includes a positioning component body and a positioning component seat. The positioning component seat is fixedly connected to the rotating shaft and is provided with a positioning component body mounting groove. The positioning component body is fixedly connected in the positioning component body mounting groove. The bracket positioning part and the valve body positioning part are disposed on the positioning component body. The bracket clamping mechanism and the valve body clamping mechanism are both connected to the positioning component seat.

9. The welding auxiliary tooling according to claim 8, characterized in that, The bracket positioning part is a positioning protrusion, which protrudes from the upper surface of the positioning component body and is used to abut against the bracket. The valve body positioning part is a positioning hole.

10. The welding auxiliary tooling according to claim 9, characterized in that, The positioning component also includes a height adjustment component, which is disposed within the positioning hole.

11. The welding auxiliary tooling according to claim 9, characterized in that, The positioning hole is a through hole, and the positioning component seat and the rotating shaft are respectively provided with a first vent hole and a second vent hole. The positioning hole is interconnected with the first vent hole and the second vent hole.

12. The welding auxiliary tooling according to any one of claims 1 to 11, characterized in that, The welding auxiliary tooling also includes a rotary positioning mechanism, which is connected to the mounting base. The rotary positioning mechanism is provided with a first positioning part, and the rotary shaft is provided with a second positioning part. The first positioning part and the second positioning part cooperate to restrict the rotation of the rotary shaft.

13. The welding auxiliary tooling according to claim 12, characterized in that, The rotary positioning mechanism includes a rotary positioning seat, a third guide shaft, a third spring, and a rotary positioning component. The rotary positioning seat is fixedly connected to the mounting base. Both ends of the third guide shaft are fixedly connected to the rotary positioning seat. The third spring and the rotary positioning component are both sleeved on the third guide shaft. The first positioning part is disposed on the rotary positioning component. Under the action of the elastic restoring force of the third spring, the first positioning part of the rotary positioning component approaches the second positioning part of the rotary shaft and is positioned and engaged with the second positioning part.

14. The welding auxiliary tooling according to claim 13, characterized in that, The rotary positioning mechanism further includes a third driving member, the output end of which is connected to the rotary positioning member. The third driving member is used to drive the rotary positioning member away from the rotation axis, so that the first positioning part is separated from the second positioning part.

15. The welding auxiliary tooling according to any one of claims 1 to 11, characterized in that, The mounting base includes a mounting plate, a bearing housing, and a bearing. The bearing housing is connected to the mounting plate, the outer ring of the bearing is fixedly connected to the bearing housing, and the inner ring of the bearing is fixedly connected to the rotating shaft. The rotating mechanism also includes a fourth driving member, which is connected to the rotating shaft and used to drive the rotating shaft to rotate around its circumference.

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