Blowing mechanism and welding device

Abstract

The utility model provides a blowing mechanism and a welding device, and relates to the technical field of welding. The blowing mechanism comprises a moving part, a driving part and a fixed part, an air chamber is arranged in the moving part, at least one air outlet is formed in the side wall of the moving part, and the air outlet is communicated with the air chamber; the driving part is used for driving the moving part to enable the air outlet to face the welding point; the fixed part is hermetically connected with the moving part. The moving part is driven by the driving part to move, the moving part can move along with the welding point, the air outlet faces the welding point, the air outlet can be aligned with the welding point, it is guaranteed that shielding gas flowing out of the air outlet can cover the welding point, each welding point can be protected when a workpiece is welded in the circumferential direction, the problems of welding spatter, air holes and the like are solved, and therefore the welding quality is improved. Due to the fact that the air outlet only provides shielding gas for the welding point which is being welded at present, consumption of the shielding gas is reduced, and production cost is reduced. And the fixed part is hermetically connected with the moving part, so that shielding gas leakage of the gas chamber is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding technical field in general, specifically, relate to a kind of blowing mechanism and welding device. BACKGROUND

[0002] The stator for vehicle includes a plurality of layers of welding pieces, and the welding pieces are made of flat copper wire material. During welding, the welding mechanism jumps to the next welding point along a circular trajectory after welding a welding point, thereby realizing the circumferential welding process of the stator for vehicle. The blowing mechanism is used to blow air to the welding point during the welding of the stator for vehicle, thereby realizing the protection of the stator for vehicle during the welding process.

[0003] Since the stator for vehicle has a plurality of layers of welding pieces, the gas blown by the blowing mechanism cannot completely cover the welding points of each layer, which leads to quality problems such as welding spatter and porosity of the welding points. SUMMARY

[0004] The blowing mechanism and the welding device provided by the utility model reduce production cost and improve production quality.

[0005] According to a first aspect of the utility model, a blowing mechanism is provided for blowing air to a welding point during workpiece welding. The blowing mechanism comprises:

[0006] A moving piece is provided with an air chamber. At least one air outlet is arranged on the side wall of the moving piece, and the air outlet is in communication with the air chamber.

[0007] A driving piece is used to drive the moving piece so that the air outlet faces the welding point.

[0008] A fixed piece is sealingly connected to the moving piece.

[0009] According to a second aspect of the utility model, a welding device is provided. The welding device comprises the blowing mechanism and a circular work station. The blowing mechanism is arranged at the center of the circular work station.

[0010] An embodiment of the utility model has the following advantages or beneficial effects:

[0011] The blowing mechanism provided by the embodiment of the utility model, the air chamber of the moving part is used for temporarily storing the protective gas, the air outlet is communicated with the air chamber, and the air chamber provides the protective gas for the air outlet. The moving part is driven to move by the driving part, the moving part can move with the welding point, the air outlet faces the welding point, the air outlet can be aligned with the welding point, the protective gas flowing out of the air outlet can cover the welding point, each welding point can be protected when the workpiece is circumferentially welded, the quality problems such as welding spatter and blowhole are reduced, and the welding quality is improved. Since the air outlet only provides the protective gas for the welding point which is currently being welded, the consumption of the protective gas is reduced, and the production cost is reduced. The fixed part is sealingly connected with the moving part, the air tightness of the moving part can be ensured even in the rotating process of the moving part, and the protective gas leakage of the air chamber is avoided.

[0012] The welding device provided by the embodiment of the utility model, the blowing mechanism is arranged at the center of the annular work station, the blowing mechanism is used for blowing air to the welding point when the workpiece is welded, the protection of the workpiece in the welding process is realized, and each welding point can be protected when the workpiece is circumferentially welded. BRIEF DESCRIPTION OF DRAWINGS

[0013] For better understanding of the utility model, the embodiments shown in the following drawings can be referred to. The components in the drawings are not necessarily in proportion, and relevant elements can be omitted in order to emphasize and clearly illustrate the technical features of the utility model. In addition, relevant elements or components can have different settings as known in the art. Furthermore, in the drawings, the same reference signs represent the same or similar components in each drawing. The above and other features and advantages of the utility model will become more apparent by referring to the example embodiments described in detail with reference to the drawings.

[0014] Among them:

[0015] Figure 1 The structure schematic view of the blowing mechanism of the embodiment one of the utility model is shown;

[0016] Figure 2 The internal structure schematic view of the blowing mechanism of the embodiment one of the utility model is shown;

[0017] Figure 3 The cooperation schematic view of the moving part and the fixed part in the blowing mechanism of the embodiment one of the utility model is shown;

[0018] Figure 4 The structure schematic view of the fixed part in the blowing mechanism of the embodiment one of the utility model is shown;

[0019] Figure 5 The structure schematic view of the moving part in the blowing mechanism of the embodiment one of the utility model is shown Figure 1 ;

[0020] Figure 6The utility model discloses a structure schematic diagram of the moving part in the blowing mechanism of the utility model embodiment one is shown Figure 2 ;

[0021] Figure 7 The utility model discloses a structure schematic diagram of the blowing mechanism of the utility model embodiment two is shown

[0022] Figure 8 The utility model discloses an internal structure schematic diagram of the blowing mechanism of the utility model embodiment two is shown

[0023] Figure 9 The utility model discloses a cooperation schematic diagram of the moving part and fixed part in the blowing mechanism of the utility model embodiment two is shown

[0024] Figure 10 The utility model discloses a structure schematic diagram of the fixed part in the blowing mechanism of the utility model embodiment two is shown Figure 1 ;

[0025] Figure 11 The utility model discloses a structure schematic diagram of the fixed part in the blowing mechanism of the utility model embodiment two is shown Figure 2 ;

[0026] Figure 12 The utility model discloses a structure schematic diagram of the blowing mechanism of the utility model embodiment three is shown

[0027] Figure 13 The utility model discloses an internal structure schematic diagram of the blowing mechanism of the utility model embodiment three is shown Figure 1 ;

[0028] Figure 14 The utility model discloses a cooperation schematic diagram of the moving part and fixed part in the blowing mechanism of the utility model embodiment three is shown Figure 1 ;

[0029] Figure 15 The utility model discloses a structure schematic diagram of the deceleration structure in the blowing mechanism of the utility model embodiment three is shown

[0030] Figure 16 The utility model discloses an internal structure schematic diagram of the blowing mechanism of the utility model embodiment three is shown Figure 2 ;

[0031] Figure 17 The utility model discloses a cooperation schematic diagram of the moving part and fixed part in the blowing mechanism of the utility model embodiment three is shown Figure 2 ;

[0032] Figure 18 The utility model discloses a structure schematic diagram of the moving part in the blowing mechanism of the utility model embodiment three is shown Figure 1 ;

[0033] Figure 19 The utility model discloses a structure schematic diagram of the moving part in the blowing mechanism of the utility model embodiment three is shown Figure 2;

[0034] Figure 20 The utility model discloses a fourth embodiment blowing mechanism internal structure schematic view shows.

[0035] Figure 21 The utility model discloses a fourth embodiment blowing mechanism internal structure schematic view shows.

[0036] Among them, the figure mark is as follows:

[0037] 100, work piece;101, welding point;

[0038] 1, moving part;2, driving part;3, fixed part;4, sealing part;5, fan;6, speed reduction structure;7, cover plate;

[0039] 10, air chamber;11, air outlet;12, guide groove;13, pressurizing block;14, first center hole;

[0040] 20, driving shaft;21, rotary drive source;

[0041] 30, base;31, extension;310, communication hole;311, first fixed groove;32, air inlet;33, gas conveying channel;

[0042] 61, main gear;62, gear ring;63, sub gear;64, fixed shaft;641, through hole. DETAILED DESCRIPTION

[0043] The technical solutions in the example embodiments of the utility model will be clearly and completely described below with reference to the drawings in the example embodiments of the utility model. The example embodiments described in the present text are only for the purpose of illustration, and are not used to limit the protection scope of the utility model, so it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the utility model.

[0044] In the description of the utility model, unless explicitly defined and limited, the term "first", "second" is only for the purpose of description, and can not be understood as indicating or implying relative importance;The term "multiple" means two or more than two;The term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0045] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Furthermore, in the description of this utility model, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this utility model. It should also be understood that, in the context, when an element or feature is mentioned as being "upper," "lower," "inner," or "outer" of another element (one or more), it can be directly connected to the other element (one or more) "upper," "lower," "inner," or "outer," or it can be indirectly connected to the other element (one or more) "upper," "lower," "inner," or "outer" through an intermediate element.

[0047] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0048] Example 1

[0049] like Figure 1 As shown, this embodiment provides a welding device for welding a workpiece 100, specifically, a stator of an automotive motor. The welding device includes a ring-shaped station where the workpiece 100 is positioned. The stator comprises multiple layers of welded components in a ring structure, nested together and arranged radially. Each welded component includes multiple individual welded units, with adjacent units abutting to form a welding point 101. During welding, a laser can be used as the welding mechanism. After welding one welding point 101, the welding mechanism moves along a ring path to the next welding point 101 until the welding of one component is completed, thus achieving circumferential welding of the workpiece 100.

[0050] For example, the welding apparatus further includes an air blowing mechanism for blowing air onto the welding point 101 during welding of the workpiece 100, thereby protecting the workpiece 100 during the welding process.

[0051] The air blowing mechanism is located at the center of the circular workstation. The air blowing mechanism is used to blow air onto the welding point 101 when the workpiece 100 is welded, so as to protect the workpiece 100 during the welding process and ensure that each welding point 101 of the workpiece 100 is protected when circumferential welding is performed.

[0052] Specifically, this embodiment also provides an air blowing mechanism for blowing air onto the welding point 101 during welding of the workpiece 100. For example... Figures 1-2 As shown, the air blowing mechanism includes a moving part 1 and a driving part 2. The moving part 1 has an air chamber 10 inside, and at least one air outlet 11 is provided on the side wall of the moving part 1, which is connected to the air chamber 10. The driving part 2 is used to drive the moving part 1 so that the air outlet 11 is directed toward the welding point 101.

[0053] The air blowing mechanism provided in this embodiment has an air chamber 10 for temporarily storing protective gas in the moving part 1, and an air outlet 11 connected to the air chamber 10, which provides protective gas to the air outlet 11. The moving part 1 is driven to move by the driving part 2, and the moving part 1 can move with the welding point 101, so that the air outlet 11 is always facing the welding point 101. This allows the air outlet 11 to be aligned with the welding point 101. With the protective gas consumption remaining unchanged, by moving the air outlet 11 to track the welding point 101, the protective gas can be blown more focused onto the welding point 101 being welded, ensuring that the protective gas flowing out of the air outlet 11 can cover the welding point 101. When the workpiece 100 is welded circumferentially, each welding point 101 can be protected. Without increasing the amount of protective gas, the welding quality is improved, and quality problems such as welding spatter and porosity are reduced.

[0054] Specifically, such as Figures 1-2 As shown, the driving component 2 includes a driving shaft 20, the output end of which is connected to the moving component 1 and is used to drive the moving component 1 to rotate so as to realize the function of the air outlet 11 of the moving component 1 tracking the welding point 101.

[0055] Specifically, the driving component 2 also includes a rotary driving source 21, which may be a rotary motor. The rotary driving source 21 is connected to the drive shaft 20, and the rotary driving source 21 drives the moving component 1 to rotate through the drive shaft 20.

[0056] In one embodiment, such as Figures 1-2 As shown, the air blowing mechanism also includes a fixing member 3, through which the drive shaft 20 passes. A rotary drive source 21 is disposed outside the fixing member 3. The fixing member 3 provides a mounting and fixing position for the rotary drive source 21 and the drive shaft 20. The moving member 1 and the fixing member 3 are arranged along the axial direction of the drive shaft 20. The fixing member 3 does not restrict the movement of the moving member 1 to ensure the smooth rotation of the moving member 1 relative to the fixing member 3.

[0057] Since the moving part 1 and the fixed part 3 are arranged along the axial direction of the drive shaft 20, and the moving part 1 rotates relative to the fixed part 3, there is a certain gap between the moving part 1 and the fixed part 3 to avoid friction between the moving part 1 and the fixed part 3 during rotation, which is beneficial to the smooth rotation of the moving part 1. However, the protective gas in the air chamber 10 will be discharged through the gap, resulting in protective gas leakage.

[0058] Therefore, the fixed part 3 is sealed to the moving part 1, so that the airtightness of the moving part 1 can be guaranteed even when the moving part 1 is rotating, and the protective gas leakage of the air chamber 10 can be avoided.

[0059] Specifically, a seal 4 is provided between the fixed part 3 and the moving part 1 along the axial direction of the drive shaft 20. The seal 4 can be a sealing ring or the like. By providing the seal 4 between the fixed part 3 and the moving part 1, the airtightness between the fixed part 3 and the moving part 1 is ensured, and a closed space is formed between the air chamber 10 of the moving part 1, the fixed part 3 and the seal 4. This prevents the leakage of protective gas and the waste of protective gas, and the sufficient protective gas can be concentrated and aligned with the welding point 101, improving welding efficiency and welding quality.

[0060] In another embodiment, along the axial direction of the drive shaft 20, a mounting groove (not shown in the figure) is provided on the end face of the fixing member 3 facing the moving member 1. The mounting groove is an annular groove structure. The sealing member 4 is disposed in the mounting groove. The bottom surface of the sealing member 4 abuts against the mounting groove, and the top surface of the sealing member 4 abuts against the moving member 1. The sealing member 4 has a certain elasticity. The fixing member 3 and the moving member 1 are respectively pressed against the top surface and bottom surface of the sealing member 4 to ensure the sealing effect between the fixing member 3 and the moving member 1.

[0061] In one embodiment, such as Figures 2-3 As shown, the fixing member 3 includes a base 30 and an extension 31. The drive shaft 20 passes through the base 30. Along the axial direction of the drive shaft 20, the rotation drive source 21 and the moving member 1 are respectively disposed on both sides of the base 30. The base 30 provides mounting positions for the rotation drive source 21 and the drive shaft 20. The extension 31 is disposed along the outer edge of the base 30 and extends along the axial direction of the drive shaft 20. Specifically, the extension 31 is disposed on the edge of the end face of the base 30 facing the moving member 1. The moving member 1 is at least partially disposed within the extension 31. The extension 31 serves to limit the position of the moving member 1 and prevent the moving member 1 from shifting position during rotation.

[0062] In one embodiment, a seal 4 is provided between the extension 31 and the moving member 1 along the axial direction of the drive shaft 20.

[0063] For example, since the bases 30 of the moving part 1 and the fixing part 3 are arranged along the axial direction of the drive shaft 20, and the extension 31 extends along the axial direction of the drive shaft 20 and toward the moving part 1, there is an overlapping portion between the extension 31 of the fixing part 3 and the moving part 1, providing installation space for the seal 4. Specifically, the seal 4 is sleeved on the outside of the moving part 1 and disposed between the moving part 1 and the extension 31. When the moving part 1 rotates, while ensuring the sealing effect between the moving part 1 and the fixing part 3, the seal 4 is subjected to relatively small compressive force, reducing the wear of the seal 4 and extending its service life.

[0064] Specifically, the inner wall of the extension 31 is provided with a first fixing groove 311. The first fixing groove 311 may be an annular groove structure. The sealing member 4 is disposed in the first fixing groove 311 to ensure the positional stability of the sealing member 4 and to prevent the sealing member 4 from shifting with the movement of the moving member 1.

[0065] Specifically, there are multiple seals 4, which are arranged along the axial direction of the drive shaft 20 to provide multiple sealing and further improve the sealing effect between the fixed part 3 and the moving part 1.

[0066] In one embodiment, such as Figure 4 As shown, the end face of the fixing member 3 facing the moving member 1 is provided with an air inlet 32, which is connected to the air chamber 10 and is used to provide protective gas to the air chamber 10.

[0067] In one embodiment, such as Figure 3 , Figures 5-6 As shown, the moving part 1 has a cylindrical shape. Along the axial direction of the drive shaft 20, the bottom of the moving part 1 has an opening facing the fixing member 3, allowing the protective gas to enter the air chamber 10 through the opening. Since the protective gas will flow upward after entering the air chamber 10, the air outlet 11 is located on the side wall of the moving part 1 and close to the top wall, that is, the air outlet 11 is located at the top of the moving part 1, which is conducive to the discharge of the protective gas through the air outlet 11. The top wall of the moving part 1 is provided with a first central hole 14, through which the drive shaft 20 passes. The rotation drive source 21 drives the moving part 1 to rotate through the drive shaft 20.

[0068] In one embodiment, the top wall of the moving part 1 is provided with at least one pressure block 13, which protrudes toward the air chamber 10. With this arrangement, the pressure block 13 occupies the internal space of the air chamber 10, increases the pressure inside the air chamber 10, enhances the impact force of the protective gas discharged from the air outlet 11, increases the range of the protective gas, and allows the protective gas to be sprayed to the welding point 101 of the outermost welded part, thereby improving the welding quality of the outermost welded part.

[0069] Specifically, the pressure block 13 has a conical structure, and the height of the protrusion of the pressure block 13 gradually decreases from the center of the top wall to the side wall. The pressure block 13 and the drive shaft 20 are coaxially arranged, and the projection of the central axis of the drive shaft 20 onto the top wall of the pressure block 13 is the center of the top wall of the pressure block 13.

[0070] In this configuration, the outer wall of the pressure block 13 is inclined, forming an angle with the axial direction of the drive shaft 20. The inclined surface acts as a guide, directing the protective gas in the air chamber 10 from the center of the top wall to the side wall, facilitating its discharge through the air outlet 11. By setting the height of the pressure block 13 to a gradually changing structure, it guides the protective gas towards the air outlet 11, allowing the protective gas located in the middle of the air chamber 10 to quickly disperse to the air outlet 11, thus increasing the gas discharge speed.

[0071] In one embodiment, such as Figure 3 , Figures 5-6 As shown, at least one guide groove 12 is provided on the inner side wall of the moving part 1, and the guide groove 12 extends along a spiral line. With this spiral structure, the shape of the guide groove 12 matches the rotational motion of the moving part 1. The guide groove 12 is used to guide the protective gas towards the air outlet 11, increasing the air volume of the air outlet 11, so as to improve the protective effect of the protective gas on the welding point 101 during welding.

[0072] Specifically, there are multiple guide channels 12, which are arranged on the inner wall of the air chamber 10 along the circumferential direction of the drive shaft 20, so that the protective gas distributed in the air chamber 10 is guided to the air outlet 11 through the multiple guide channels 12, thereby further increasing the air output of the air outlet 11.

[0073] Understandably, due to the limited width of the air outlet 11, a portion of the outlet of the guide channel 12 extends directly to the air outlet 11, allowing the protective gas located near the guide channel 12 to be directly guided to the air outlet 11 through the guide channel 12; another portion of the guide channel 12 extends to the top wall of the moving part 1, which is beneficial for guiding the protective gas upward.

[0074] Example 2

[0075] like Figures 7-9 As shown, along the axial direction of the drive shaft 20, the extension 31 provided in this embodiment has a relatively high height, and the extension 31 continues to extend along the base 30 toward the moving member 1. An opening is formed at the top of the extension 31.

[0076] like Figures 7-9As shown, the air blowing mechanism provided in this embodiment also includes a cover plate 7, which covers the extension 31. This arrangement seals the opening of the extension 31, forming a sealed cavity between the cover plate 7 and the extension 31. The sealed cavity accommodates the moving part 1, which can rotate within the sealed cavity. The sealed cavity provides a sealed space for the moving part 1, improving the sealing between the fixed part 3 and the moving part 1 and preventing leakage of the protective gas.

[0077] It is understood that a sealing gasket can be provided between the extension 31 and the cover plate 7. The sealing gasket serves to seal between the extension 31 and the cover plate 7, further avoiding the risk of leakage and waste of protective gas. In addition, sealing rings can also be provided between the drive shaft 20 and the cover plate 7, and between the drive shaft 20 and the base 30, to further improve the sealing effect. It should be noted that in this embodiment, the sealing gasket, sealing ring, and sealing element 4 can be arranged according to their sealing priority.

[0078] Since the extension 31 is located between the moving part 1 and the workpiece 100, the protective air flowing out of the air outlet 11 of the moving part 1 cannot reach the workpiece 100 due to the obstruction of the extension 31.

[0079] Therefore, such as Figures 9-11 As shown, the extension 31 has at least one connecting hole 310 corresponding to the air outlet 11, and the connecting hole 310 is connected to the air outlet 11. With this configuration, the protective gas flowing out of the air outlet 11 is blown towards the welding point 101 of the workpiece 100 through the connecting hole 310, which ensures the sealing effect without affecting the exhaust effect of the protective gas.

[0080] Since the workpiece 100 is set in an annular station, the fixing part 3 of the air blowing structure is set in the center of the annular station, and multiple welding points 101 of the workpiece 100 are arranged along the circumference of the drive shaft 20, the number of connecting holes 310 is multiple. Multiple connecting holes 310 are arranged along the circumference of the drive shaft 20 on the extension 31, so that multiple connecting holes 310 correspond to multiple welding points 101.

[0081] Specifically, when the air outlet 11 faces each welding point 101, a connecting hole 310 is provided on the line connecting the center of the air outlet 11 and each welding point 101. The air outlet 11 is a rectangular through hole, and the center of the air outlet 11 is the intersection of the two diagonals of the rectangular through hole.

[0082] In this way, multiple connecting holes 310 are set to correspond to multiple welding positions. Each air outlet 11 can blow protective gas to its corresponding welding point 101 through the connecting hole 310. The protective gas can be discharged at a fixed point. While ensuring sufficient protective gas output, it can also reduce the waste of protective gas, save energy, and reduce production costs.

[0083] In one embodiment, the width of the connecting hole 310 is smaller than the width of the air outlet 11 in the circumferential direction along the drive shaft 20.

[0084] In this way, the air outlet 11 has a larger air outlet range than the connecting hole 310, so that the protective gas discharged from the air outlet 11 can be discharged through at least one connecting hole 310, ensuring the effectiveness and sufficiency of the protective gas discharge.

[0085] For example, the width of the air outlet 11 is greater than or equal to the width of the multiple connecting holes 310 and the interval between two adjacent connecting holes 310, so that one air outlet 11 can be aligned with multiple connecting holes 310 at the same time, so that multiple connecting holes 310 can blow protective gas to two welding points 101 at the same time, thereby improving welding efficiency.

[0086] Specifically, the width of the air outlet 11 is equal to the width of the three connecting holes 310 and twice the spacing between two adjacent connecting holes 310. That is, one air outlet 11 corresponds to three connecting holes 310. As the moving part 1 rotates, the three connecting holes 310 can blow protective gas simultaneously. The first connecting hole 310 blows protective gas into the welding point 101 in advance to achieve the function of pre-protection; the second connecting hole 310 blows protective gas into the welding point 101 in a concentrated manner to protect the welding point 101 during welding; and the third connecting hole 310 blows protective gas into the welding point 101 with a delay to protect the welding point 101 after welding is completed. In this way, the welding point 101 can be protected by blowing gas before, during and after welding, ensuring that the welding point 101 is fully protected throughout the entire welding process, thereby further improving the welding quality.

[0087] In one embodiment, the length of the air outlet 11 along the axial direction of the drive shaft 20 is greater than or equal to the length of the connecting hole 310. With this configuration, the sidewall of the moving part 1 is not blocked by the connecting hole 310, and the connecting hole 310 is exposed. The protective gas flowing out of the air outlet 11 can be discharged through the connecting hole 310 to the maximum extent, thereby improving the delivery efficiency of the protective gas.

[0088] Example 3

[0089] like Figures 12-17 As shown, the air blowing structure provided in this embodiment also includes a fan 5, which is disposed inside the air chamber 10 to increase the gas flow rate at the air outlet 11. By setting the fan 5 to rotate relative to the air chamber 10, the fan 5 can agitate the protective gas inside the air chamber 10, thereby increasing the pressure and enhancing the flow rate and force of the protective gas at the air outlet 11. This allows the protective gas to be sprayed further, covering the outermost welding point 101, reducing welding defects at the outermost welding point 101, and improving the overall welding quality.

[0090] The fan 5 is driven by the drive component 2. The fan 5 does not require additional drive components; it is driven directly using the existing drive component 2, saving production costs. Specifically, the drive component 2 includes a drive shaft 20, which passes through the fixed component 3. The moving component 1 and the fixed component 3 are arranged along the axial direction of the drive shaft 20, and the fan 5 is sleeved on the drive shaft 20. A single drive component 2 can simultaneously drive the rotation of the moving component 1 and the fan 5, making it multi-functional and highly adaptable.

[0091] Since the rotational speed of moving part 1 is matched with the welding speed of welding point 101, and welding point 101 requires a certain welding time, the rotational speed of moving part 1 is relatively low. However, fan 5 is used to increase the pressure inside air chamber 10, so fan 5 requires a relatively high rotational speed. Therefore, as... Figure 17 As shown, the drive shaft 20 is connected to the air chamber 10 via a reduction gear 6. The reduction gear 6 can be located inside or outside the air chamber 10. The reduction gear 6 is used to solve the speed difference between the fan 5 and the air chamber 10. When the same drive element 2 drives the moving part 1 and the fan 5 to rotate, the speed of the moving part 1 can be less than the speed of the fan 5.

[0092] Specifically, such as Figures 17-19 As shown, the driving component 2 also includes a main gear 61 and at least one sub-gear 63. The main gear 61 is sleeved on the driving shaft 20 and functions as a central gear or sun gear. The number of sub-gears 63 can be one or more, arranged along the circumferential direction of the driving shaft 20, and each sub-gear 63 functions as a planetary gear. A gear ring 62 is provided on the inner wall of the moving component 1, serving to fix the gear ring. The main gear 61 meshes with the sub-gear 63, and the gear ring 62 meshes with the sub-gear 63. The number of teeth on the sub-gear 63 is greater than the number of teeth on the main gear 61, and the number of teeth on the gear ring 62 is greater than the number of teeth on the sub-gear 63. In this embodiment, the moving part 1 is not directly driven by the drive shaft 20. The rotational power of the drive shaft 20 is transmitted to the moving part 1 through the main gear 61, the sub-gear 63 and the gear ring 62. According to the principle that the number of teeth and the rotational speed are inversely proportional, the rotational speed of the drive shaft 20 is reduced through two stages to achieve the function of speed reduction, so that the moving part 1 obtains a smaller rotational speed. Meanwhile, the drive part 2 directly drives the fan 5, and the rotational speed of the fan 5 is the same as that of the drive part 2. Therefore, the rotational speed of the moving part 1 is less than that of the fan 5.

[0093] In one embodiment, each sub-gear 63 is sleeved on a corresponding fixed shaft 64, and the fixed shaft 64 is fixed to the fixing member 3. Specifically, the fixed shaft 64 protrudes from the end face of the fixing member 3 facing the moving member 1, and the fixed shaft 64 passes through the sub-gear 63, providing the rotation center for the sub-gear 63.

[0094] It is understandable that the fixed shaft 64 and the fastener 3 are integrally molded, which reduces the number of parts assembly steps and saves production costs.

[0095] In this embodiment, both the air inlet 32 ​​and the fixed shaft 64 are located on the end face of the fixed member 3 facing the moving member 1. The number of air inlets 32 and fixed shafts 64 can be the same or different, and the number of air inlets 32 can be greater than the number of fixed shafts 64 to ensure sufficient air intake for the protective gas. It is understood that this embodiment does not limit the number and position of the air inlets 32 and fixed shafts 64, but it is necessary to reasonably plan the number and position of the air inlets 32 and fixed shafts 64 to avoid positional interference between them.

[0096] Example 4

[0097] like Figures 20-21 As shown, at least one of the fixed shafts 64 provided in this embodiment is provided with a through hole 641, and the air chamber 10 enters through the through hole 641.

[0098] Using this method, there is no need to open an additional air inlet 32 ​​on the fixing component 3; the protective gas can enter the air chamber 10 through the through hole 641. The fixed shaft 64 has a dual function of providing a rotation center for the sub-gear 63 and providing an inlet for the protective gas, achieving functional integration and strong functionality. In addition, the air inlet 32 ​​and the fixed shaft 64 are integrated into a single structure, saving space and reducing the difficulty of processing and installation.

[0099] Specifically, along the axial direction of the drive shaft 20, the base 30 of the fixing member 3 is provided with an air supply channel 33. One end of the air supply channel 33 is connected to the air source, and the other end is connected to the through hole 641. The air supply channel 33 plays the role of supplying protective gas.

[0100] It should be noted that the embodiments of this utility model are merely one example of the principles employed by the present utility model, as shown in the accompanying drawings and described herein. Those skilled in the art will clearly understand that the principles of this utility model are not limited to any details or components of the apparatus shown in the accompanying drawings or described in the specification.

[0101] It should be understood that this invention is not limited to the detailed structure and arrangement of the components described herein. This invention can have other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this invention. It should be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this invention. The embodiments described in this specification illustrate the best known mode for implementing this invention and will enable those skilled in the art to utilize this invention.

[0102] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and exemplary embodiments are to be considered as exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

[0103] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of this utility model is limited only by the appended claims.

Claims

1. An air blowing mechanism for blowing air onto the welding point during workpiece welding, characterized in that, include: A moving part, wherein an air chamber is provided inside the moving part, and at least one air outlet is provided on the side wall of the moving part, and the air outlet is connected to the air chamber; A driving component is used to drive the moving component so that the air outlet faces the welding point; The fixing component is sealed to the moving component.

2. The air blowing mechanism according to claim 1, characterized in that, The driving component includes a driving shaft, which passes through the fixed component, and the output end of the driving shaft is connected to the moving component; The moving component and the fixed component are arranged along the axial direction of the drive shaft.

3. The air blowing mechanism according to claim 2, characterized in that, Along the axial direction of the drive shaft, A sealing element is provided between the fixed component and the moving component.

4. The air blowing mechanism according to claim 2, characterized in that, The fastener includes a base and an extension, the extension being disposed along the outer edge of the base and extending along the axial direction of the drive shaft.

5. The air blowing mechanism according to claim 4, characterized in that, Along the axial direction of the drive shaft, a seal is provided between the extension and the moving part.

6. The air blowing mechanism according to claim 4, characterized in that, Also includes: A cover plate, the cover plate being disposed over the extension; The extension is provided with at least one connecting hole, which is connected to the air outlet.

7. The air blowing mechanism according to claim 6, characterized in that, When the air outlet faces each of the welding points, a connecting hole is provided on the line connecting the center of the air outlet and each of the welding points.

8. The air blowing mechanism according to claim 7, characterized in that, Along the circumferential direction of the drive shaft, the width of the connecting hole is smaller than the width of the air outlet.

9. The air blowing mechanism according to claim 1, characterized in that, The top wall of the moving part is provided with at least one pressure block, which protrudes toward the air chamber, wherein the height of the pressure block protrudes gradually decreases from the center of the top wall of the moving part toward the side wall.

10. The air blowing mechanism according to claim 1, characterized in that, Also includes: A fan, located in the air chamber and driven by the drive unit, is used to increase the gas flow rate at the air outlet.

11. The air blowing mechanism according to claim 10, characterized in that, The driving component includes a driving shaft, which passes through the fixing component; The moving component and the fixed component are arranged along the axial direction of the drive shaft; The fan is fitted onto the drive shaft.

12. The air blowing mechanism according to claim 11, characterized in that, The driving component further includes a main gear and at least one sub-gear, wherein the main gear is sleeved on the driving shaft; The inner wall of the moving part is provided with a toothed ring; The main gear meshes with the sub-gear, the gear ring meshes with the sub-gear, the number of teeth of the sub-gear is greater than the number of teeth of the main gear, and the number of teeth of the gear ring is greater than the number of teeth of the sub-gear.

13. The air blowing mechanism according to claim 12, characterized in that, Each of the sub-gears is sleeved on a corresponding fixed shaft, and the fixed shaft is fixed to the fixing member.

14. The air blowing mechanism according to claim 13, characterized in that, At least one of the fixed shafts has a through hole, through which air enters the air chamber.

15. The air blowing mechanism according to claim 1, characterized in that, The inner side wall of the moving part is provided with at least one flow guide groove, which extends along a spiral line.

16. A welding apparatus, characterized in that, It includes the air blowing mechanism and the annular workstation as described in any one of claims 1-15, wherein the air blowing mechanism is located at the center of the annular workstation.

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