Automobile part welding device

Abstract

The utility model discloses an automobile part welding device which comprises a working table, a plurality of supporting legs are fixedly connected to the bottom of the working table, supports are fixedly connected to the two sides of the top of the working table, and adjusting grooves are formed in the surfaces of the tops of the supports. A first adjusting mechanism and a second adjusting mechanism are arranged between the supports, a welding frame is arranged below the first adjusting mechanism and the second adjusting mechanism, a plurality of fixing rods are fixedly connected between the bottom of the welding frame and the top of the workbench, and positioning mechanisms are arranged on the two sides of the welding frame; and air cooling mechanisms are arranged on the welding frame and the workbench. The front-back position and the left-right position of a welding point can be adjusted at any time according to needs, the welding mechanism is detachable so that regular maintenance and replacement can be carried out conveniently, the surface temperature of related welding parts can be reduced in time, and long-time overheating is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts processing, especially relates to a welding device for automobile parts. BACKGROUND

[0002] Automobile parts are the basic constituent units of automobile operation, control, safety, comfort and other functions, and each part has its specific function. Automobile part welding is an important link in the automobile manufacturing process, which is used to connect metal or non-metal parts into a whole to ensure the structural strength, air tightness and durability of the vehicle.

[0003] At present, there are many kinds of welding devices on the market, such as a welding device for automobile parts disclosed on China patent network with the publication number CN222154372U. This welding device can be used for welding processing of automobile parts, but there are some defects and deficiencies to be improved: (1) some existing welding devices can only be used for welding processing of automobile parts at fixed positions due to the structural design, and it is difficult to quickly adjust the position of the welding point according to the shape and size of different automobile parts, and the flexibility is poor; (2) some existing welding devices are mostly designed in an integrated manner, and the main welding mechanism is often fixedly connected and difficult to disassemble, so it is not convenient to regularly maintain the welding mechanism, and it is also not convenient to quickly replace the corresponding welding mechanism according to different welding methods; (3) some existing welding devices lack effective cooling measures, and when working for a long time, the welding mechanism and other related parts will be continuously affected by high temperature. If cooling and temperature reduction cannot be carried out in time, the service life of the related parts will be shortened due to overheating, and even material burning or equipment failure will be caused. Therefore, in view of the above problems, the utility model provides a welding device for automobile parts, which has important significance. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of automobile parts welding device, and automobile parts can be welded by welding mechanism, and the front and rear and left and right positions of welding point can be adjusted at any time according to need in welding process;Welding mechanism is fixedly installed at the bottom of lifting plate by the mutual cooperation between stud, nut and mounting hole, and welding mechanism can be removed from the bottom of lifting plate by unscrewing nut, so as to regularly maintain welding mechanism, and welding mechanism can be replaced according to different welding methods;Air flow speed around welding mechanism and welding frame can be accelerated by air cooling mode using air cooling mechanism, so as to reduce the surface temperature of related welding parts in time, avoid long time overheating, and the problems in background art are solved.

[0005] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a kind of automobile parts welding devices, including workbench, the bottom of workbench is fixedly connected with several support legs, and the top of workbench is fixedly connected with support on both sides, the top surface of support is provided with adjusting groove, and first adjusting mechanism and second adjusting mechanism are respectively provided between support, welding frame is arranged below first adjusting mechanism and second adjusting mechanism, several fixed rods are fixedly connected between the bottom of welding frame and the top of workbench, positioning mechanism is arranged on both sides of welding frame, and air cooling mechanism is arranged on welding frame and workbench;

[0007] The first adjusting mechanism includes a pair of sleeves, the sleeves are square tube structures, and are respectively sleeved on the two supports, and threaded holes are formed in the top of the sleeves, bolts matched with the threaded holes are threadedly connected in the threaded holes, a fixed plate is fixedly connected between the two sleeves, and a sliding groove is formed in the fixed plate.

[0008] The second adjusting mechanism includes a pair of fixed blocks and a top plate, the pair of fixed blocks are fixedly connected to the bottoms of the two sleeves, one of the fixed blocks is provided with a motor, an output end of the motor is provided with a lead screw, the lead screw penetrates the other fixed block and is mounted on the other fixed block through a bearing, the top plate is above the fixed plate, a sliding block is fixedly connected to the bottom of the top plate, the sliding block penetrates the sliding groove, a moving seat is fixedly connected to the bottom of the sliding block, a transmission hole is formed in the moving seat, an inner thread matched with the lead screw is arranged on the hole wall of the transmission hole, the lead screw penetrates the transmission hole, a gas cylinder is mounted to the bottom of the moving seat, an output shaft of the gas cylinder is fixedly connected to a lifting plate at the bottom end, and a welding mechanism is mounted to the bottom of the lifting plate.

[0009] The welding mechanism includes a mounting plate, and a welding gun is mounted to the bottom of the mounting plate.

[0010] The positioning mechanism includes an electric telescopic rod, the electric telescopic rod is mounted to the inner wall of the welding frame, and a positioning plate is fixedly connected to the output shaft end of the electric telescopic rod.

[0011] The air cooling mechanism includes a blowing warehouse and two pairs of air guide warehouses, the blowing warehouse is mounted to the bottom of the workbench, a pair of air guide pipes is mounted to the two sides of the blowing warehouse, a fan is mounted to the bottom of the blowing warehouse, the fan blades of the fan are located in the blowing warehouse, two pairs of the air guide warehouses are respectively mounted to the two side outer walls of the welding frame, a plurality of air outlet holes are formed in the connection positions of each air guide warehouse and the welding frame, one end of each air guide pipe is connected to the blowing warehouse, and the other end of each air guide pipe penetrates the workbench and is mounted to the bottom of each air guide warehouse and connected to the inner cavity of the air guide warehouse.

[0012] Further, the welding frame is provided with a receiving cavity, and a plurality of recycling holes are formed in the top of the welding frame, the recycling holes are square hole structures, and are linearly distributed at equal intervals along the length direction of the top surface of the welding frame, the recycling holes are communicated with the receiving cavity, and a recycling groove is arranged in the receiving cavity.

[0013] Further, the inner wall length and width of the sleeve correspond to the width and thickness of the top of the support, the adjusting groove is rectangular, the groove width corresponds to the hole diameter of the threaded hole, and the adjusting groove is located directly below the threaded hole.

[0014] Further, the sliding groove is rectangular, the groove width corresponds to the thickness of the sliding block, and the top plate is rectangular, the width is greater than the groove width of the sliding groove.

[0015] Further, the top of the mounting plate is fixedly connected with a plurality of threaded studs, nuts matched with the threaded studs are threadedly connected to the threaded studs, the surface of the lifting plate is provided with a plurality of mounting holes, the number of the mounting holes corresponds to the number of the threaded studs, the hole diameter corresponds to the diameter of the threaded studs, and the center of each mounting hole corresponds to the center of each threaded stud.

[0016] Further, the air outlet holes are divided into two groups, each group of the air outlet holes is symmetrically distributed about the positioning mechanism, and each air outlet hole in each group is linearly arrayed.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The automobile part welding device in the utility model can weld automobile parts through the welding mechanism during use, and the front and rear and left and right positions of the welding point can be adjusted at any time through the first adjusting mechanism and the second adjusting mechanism according to needs;

[0019] (2) The automobile part welding device in the utility model is fixedly installed at the bottom of the lifting plate through the cooperation between the threaded studs, the nuts and the mounting holes during use, and the welding mechanism can be detached from the bottom of the lifting plate by rotating the nuts, so that the welding mechanism can be regularly maintained, and the welding mechanism corresponding to different welding methods can be replaced conveniently;

[0020] (3) The automobile part welding device in the utility model can utilize the air cooling mode to accelerate the air flow speed around the welding mechanism and the welding frame through the air cooling mechanism during use, so that the surface temperature of the related welding parts can be lowered in time, and long-time overheating can be avoided.

[0021] Of course, it is not necessary for any product implementing the utility model to simultaneously achieve all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed for the description of the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following are only some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The structure diagram of the automobile part welding device of the present application is shown in the figure.

[0024] Figure 2 The structure diagram of the workbench and the welding frame in the present application is shown in the figure.

[0025] Figure 3 The structure diagram of the first adjusting mechanism in the present application is shown in the figure.

[0026] Figure 4 The structure diagram of the second adjusting mechanism in the present application is shown in the figure.

[0027] Figure 5 The structure diagram of the welding mechanism in the present application is shown in the figure.

[0028] Figure 6 The structure diagram of the air cooling mechanism in the present application is shown in the figure.

[0029] In the drawings, the component list represented by each number is as follows:

[0030] 1, workbench; 2, supporting leg; 3, support; 4, adjusting groove; 5, welding frame; 6, fixed rod; 7, sleeve; 8, threaded hole; 9, bolt; 10, fixed plate; 11, sliding groove; 12, fixed block; 13, top plate; 14, motor; 15, screw rod; 16, sliding block; 17, moving seat; 18, transmission hole; 19, air cylinder; 20, lifting plate; 21, mounting plate; 22, welding gun; 23, electric telescopic rod; 24, positioning plate; 25, air blowing bin; 26, air guiding bin; 27, air guiding pipe; 28, fan; 29, air outlet hole; 30, storage cavity; 31, recycling hole; 32, recycling groove; 33, stud; 34, nut; 35, mounting hole. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the utility model, need understanding, the term "relatively", "one end", "internal", "transversely", "end", "two ends", "two sides", "front", "one end surface", "the other end surface" and so on indicate the orientation or position relation, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the component or element must have a specific orientation, construct and operate in a specific orientation, therefore can not be understood as the limitation to the utility model.

[0033] Please refer to Figures 1-6 The utility model discloses a kind of automobile parts welding devices, as shown in the utility model, welding device includes workbench 1, the bottom of workbench 1 is fixedly connected with several support legs 2, and the top of workbench 1 both sides is fixedly connected with support 3, the top surface of support 3 is provided with adjusting groove 4, and first adjusting mechanism and second adjusting mechanism are respectively provided between support 3, the below of first adjusting mechanism and second adjusting mechanism is provided with welding frame 5, several fixed rods 6 are fixedly connected between the bottom of welding frame 5 and the top of workbench 1, the both sides of welding frame 5 are provided with positioning mechanism, and air cooling mechanism is provided on welding frame 5 and workbench 1;

[0034] First adjusting mechanism includes a pair of sleeve pipe 7, sleeve pipe 7 is square tube structure, and is respectively sleeved on two supports 3, and the top of sleeve pipe 7 is provided with threaded hole 8, threaded hole 8 is threadedly connected with the bolt 9 matched therewith, two sleeve pipes 7 are fixedly connected with fixed plate 10, and sliding slot 11 is formed in fixed plate 10;

[0035] Second adjusting mechanism includes a pair of fixed blocks 12 and top plate 13, a pair of fixed blocks 12 are fixedly connected at the bottom of two sleeve pipes 7, one of fixed blocks 12 is installed with motor 14, the output end of motor 14 is installed with lead screw 15, lead screw 15 penetrates another fixed block 12 and is installed on another fixed block 12 through bearing, top plate 13 is located above fixed plate 10, and its bottom is fixedly connected with sliding block 16, sliding block 16 passes through sliding slot 11, and its bottom is fixedly connected with moving seat 17, driving hole 18 is formed in moving seat 17, and the hole wall of driving hole 18 is provided with the internal thread matched with lead screw 15, lead screw 15 passes through driving hole 18, and the bottom of moving seat 17 is installed with pneumatic cylinder 19, the output shaft bottom end of pneumatic cylinder 19 is fixedly connected with lifting plate 20, and the bottom of lifting plate 20 is installed with welding mechanism;

[0036] The welding mechanism comprises a mounting plate 21, the bottom of the mounting plate 21 is provided with a welding gun 22, the lifting plate 20 can be driven to move up and down together with the welding mechanism through the driving cylinder 19, when the welding mechanism moves to the upper side of the welding frame 5, the automobile parts placed on the top of the welding frame 5 can be welded through the welding gun 22, the welding gun 22 is a product on the market, and corresponding welding equipment can be selected according to the specific welding method, for example, an electrode head can be selected for resistance welding, and a laser generator can be selected for laser welding;

[0037] The positioning mechanism comprises an electric telescopic rod 23, the electric telescopic rod 23 is installed on the inner wall of the welding frame 5, the output shaft end of the electric telescopic rod 23 is fixedly connected with a positioning plate 24, during welding, the automobile parts to be welded can be placed on the welding frame 5, then the electric telescopic rod 23 is driven to drive the positioning plate 24 to move until the positioning plate 24 tightly adheres to the side wall of the automobile parts, at this time, the automobile parts can be clamped and fixed through the positioning plate 24, so as to prevent displacement of the automobile parts during welding and affect the welding precision.

[0038] The air cooling mechanism comprises a blowing warehouse 25 and two pairs of air guide warehouses 26, the blowing warehouse 25 is installed at the bottom of the workbench 1, a pair of air guide pipes 27 is installed on the two sides of the blowing warehouse 25, and a fan 28 is installed at the bottom of the blowing warehouse 25, the fan blades of the fan 28 are located in the blowing warehouse 25, the two pairs of air guide warehouses 26 are respectively installed on the two side outer walls of the welding frame 5, a plurality of air outlet holes 29 are formed in the connection position of each air guide warehouse 26 and the welding frame 5, one end of each air guide pipe 27 is communicated with the blowing warehouse 25, the other end of each air guide pipe 27 penetrates through the workbench 1 and is respectively installed at the bottom of each air guide warehouse 26 and communicated with the inner cavity of the air guide warehouse 26, when the welding device works for a long time, the fan 28 can be driven to blow air, the cold air blown out by the fan 28 can be guided to the corresponding air guide warehouse 26 through each air guide pipe 27, and then blown out through each air outlet hole 29, so that the air flow speed around the welding mechanism and the welding frame 5 can be accelerated by air cooling, so as to timely reduce the surface temperature of the related welding parts and avoid long-time overheating.

[0039] The welding frame 5 is provided with a receiving cavity 30, and a plurality of recycling holes 31 are formed in the top of the welding frame 5, the recycling holes 31 are square hole structures and are linearly distributed at equal intervals along the length direction of the top surface of the welding frame 5, the recycling holes 31 are communicated with the receiving cavity 30, a recycling groove 32 is placed in the receiving cavity 30, the recycling groove 32 can contain cold water, the metal particles and slag generated during welding can fall into the recycling groove 32 through the recycling holes 31 and be cooled by the cold water in the recycling groove 32, so that the metal particles and slag can be recycled for subsequent unified cleaning or reuse.

[0040] The inner wall length and width of the sleeve 7 correspond to the width and thickness of the top of the support 3, the adjusting groove 4 is rectangular, the groove width corresponds to the hole diameter of the threaded hole 8, the adjusting groove 4 is located directly below the threaded hole 8, the sleeve 7 can drive the fixed plate 10 to move along the support 3, the second adjusting mechanism and the welding mechanism are adjusted according to the front and back positions of the welding point, the end of the bolt 9 is screwed into the groove bottom of the adjusting groove 4 by tightening the bolt 9 in the threaded hole 8, and the position of the first adjusting mechanism is fixed by the cooperation between the bolt 9 and the adjusting groove 4.

[0041] The sliding groove 11 is rectangular, the groove width corresponds to the thickness of the sliding block 16, the top plate 13 is rectangular, the width is greater than the groove width of the sliding groove 11, the driving motor 14 can drive the screw rod 15 to rotate, the screw rod 15 rotates and drives the moving seat 17 to move along the fixed plate 10 by the cooperation between the transmission hole 18, the left and right positions of the welding point are adjusted according to the needs, the sliding block 16 is closely attached to the groove wall of the sliding groove 11 during movement, and the position limiting effect is achieved, so that the stability of the welding mechanism is affected by preventing the second adjusting mechanism from shaking and tilting during movement.

[0042] The top of the mounting plate 21 is fixedly connected with a plurality of threaded holes 33, the threaded holes 33 are threadedly connected with nuts 34 matched with the threaded holes 33, the surface of the lifting plate 20 is provided with a plurality of mounting holes 35, the number of the mounting holes 35 is the same as that of the threaded holes 33, the hole diameter of the mounting holes 35 corresponds to the diameter of the threaded holes 33, and the center of each mounting hole 35 corresponds to the center of each threaded hole 33, each threaded hole 33 can be aligned and pass through the corresponding mounting hole 35, the welding mechanism is fixedly installed at the bottom of the lifting plate 20 through the cooperation of the threaded holes 33, the nuts 34 and the mounting holes 35 when the nuts 34 are threadedly connected on the threaded holes 33 and tightened, and the welding mechanism can be removed from the bottom of the lifting plate 20 by unscrewing the nuts 34, so that the welding mechanism can be regularly maintained, and the welding mechanism corresponding to different welding methods can be replaced.

[0043] The air outlet holes 29 are divided into two groups, each group of air outlet holes 29 is symmetrically distributed about the positioning mechanism, and each air outlet hole 29 in each group of air outlet holes 29 is linearly arranged, the blowing range of the air cooling mechanism can be effectively expanded through the multiple groups of air outlet holes 29, so that the cold air blown out can fully cover the welding mechanism and the black pepper sauce, thereby greatly improving the cooling efficiency and effect.

[0044] The circuit, electronic components and chip modules involved in the utility model are prior art, and those skilled in the art can realize them without further description, and the content protected by the utility model does not involve improvement of software and methods.

[0045] The standard parts used in the application file can be purchased from the market, all the parts in the application file can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, and the mechanical parts and equipment adopt the conventional type in the prior art.

[0046] The working principle of the utility model is:

[0047] In use, the automobile parts to be welded are placed on the welding frame 5, then the electric telescopic rod 23 is driven to move the positioning plate 24 until the positioning plate 24 tightly adheres to the side wall of the automobile parts, at this time the automobile parts are clamped and fixed through the positioning plate 24, then the cylinder 19 is driven to move the lifting plate 20 together with the welding mechanism up and down, when the welding mechanism moves to the upper side of the welding frame 5, the automobile parts placed on the top of the welding frame 5 can be welded through the welding gun 22, during the welding process, the sleeve 7 can drive the fixed plate 10 together with the second adjusting mechanism and the welding mechanism to move back and forth along the support 3, so as to adjust the front and back positions of the welding point as needed, by tightening the bolt 9 in the threaded hole 8, the end of the bolt 9 can be screwed into the groove bottom of the adjusting groove 4, at this time the position of the first adjusting mechanism can be fixed through the cooperation between the bolt 9 and the adjusting groove 4, at the same time, the motor 14 is driven to rotate the lead screw 15, when the lead screw 15 rotates, the moving seat 17 together with the welding mechanism can be driven to move left and right along the fixed plate 10 through the cooperation between the transmission hole 18, so as to adjust the left and right positions of the welding point as needed, when the welding device works for a long time, the fan 28 can be driven to blow air, the cold air blown by the fan 28 can be guided to the corresponding air guide bin 26 through the air guide pipe 27, and blown out through the air outlet hole 29, so that the air flow speed around the welding mechanism and the welding frame 5 can be accelerated by air cooling, so as to reduce the surface temperature of the related welding parts in time, and avoid overheating for a long time.

[0048] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific implementation described. Obviously, according to the content of the description, many modifications and changes can be made. The description selects and describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. An automobile parts welding device characterized by comprising: The utility model provides a welding device, including workbench, the bottom of workbench is fixedly connected with a plurality of support legs, and both sides of the top of workbench are fixedly connected with support, the top surface of support is equipped with adjusting slot, and first adjusting mechanism and second adjusting mechanism are arranged respectively between support, the lower of first adjusting mechanism and second adjusting mechanism is equipped with welding frame, a plurality of fixed rods are fixedly connected between the bottom of welding frame and the top of workbench, both sides of welding frame are equipped with positioning mechanism, and air cooling mechanism is arranged on welding frame and workbench; The first adjusting mechanism includes a pair of sleeves, the sleeves are square tube structures, and are respectively sleeved on the two supports, the top of the sleeve is provided with a threaded hole, the threaded hole is threadedly connected with a bolt matched therewith, the two sleeves are fixedly connected with a fixed plate, and the fixed plate is provided with a sliding groove; The second adjusting mechanism includes a pair of fixed blocks and a top plate, the pair of fixed blocks are respectively fixedly connected to the bottom of the two sleeves, one of the fixed blocks is provided with a motor, the output end of the motor is provided with a screw rod, the screw rod penetrates through the other fixed block and is connected to the other fixed block through a bearing, the top plate is above the fixed plate, the bottom of the top plate is fixedly connected with a sliding block, the sliding block penetrates through the sliding groove, the bottom of the sliding block is fixedly connected with a moving seat, the moving seat is provided with a transmission hole, the hole wall of the transmission hole is provided with an internal thread matched with the screw rod, the screw rod penetrates through the transmission hole, the bottom of the moving seat is provided with an air cylinder, the output shaft of the air cylinder is fixedly connected with a lifting plate at the bottom end, and the bottom of the lifting plate is provided with a welding mechanism; The welding mechanism includes a mounting plate, and the bottom of the mounting plate is provided with a welding gun; The positioning mechanism includes an electric telescopic rod, the electric telescopic rod is installed on the inner wall of the welding frame, and the output shaft of the electric telescopic rod is fixedly connected with a positioning plate at the end. The air cooling mechanism includes a blowing warehouse and two pairs of air guide warehouses, the blowing warehouse is installed at the bottom of the workbench, a pair of air guide pipes is installed at the two sides of the blowing warehouse, and a fan is installed at the bottom of the blowing warehouse, the fan blades of the fan are located in the blowing warehouse, two pairs of the air guide warehouses are installed on the two outer walls of the welding frame, a plurality of air outlet holes are formed in the connection part between each air guide warehouse and the welding frame, one end of each air guide pipe is connected with the blowing warehouse, the other end of each air guide pipe penetrates through the workbench and is installed at the bottom of each air guide warehouse and connected with the inner cavity of the air guide warehouse.

2. The apparatus of claim 1, wherein, A receiving cavity is formed in the welding frame, a plurality of recovery holes are formed in the top of the welding frame, the recovery holes are square hole structures and are linearly distributed at equal distances along the length direction of the top surface of the welding frame, the recovery holes are connected with the receiving cavity, and a recovery groove is placed in the receiving cavity.

3. The apparatus of claim 1, wherein the welding head is configured to weld the automobile part in a plurality of welding passes. The inner wall length and width of the sleeve correspond to the width and thickness of the top of the support, the adjusting slot is rectangular, the slot width of the adjusting slot corresponds to the hole diameter of the threaded hole, and the adjusting slot is located directly below the threaded hole.

4. The apparatus of claim 1, wherein the welding head is configured to weld the automobile part in a plurality of welding passes. The sliding groove is rectangular, the slot width of the sliding groove corresponds to the thickness of the sliding block, and the top plate is rectangular, the width of the top plate is greater than the slot width of the sliding groove.

5. The apparatus of claim 1, wherein the welding head is configured to weld the automobile part in a plurality of welding passes. The top of the mounting plate is fixedly connected with a plurality of studs, nuts matched with the studs are threadedly connected on the studs, the surface of the lifting plate is provided with a plurality of mounting holes, the mounting holes are equal in number to the studs, the hole diameter of the mounting holes corresponds to and is equal to the diameter of the studs, and the center of each mounting hole corresponds to the center of each stud.

6. The apparatus of claim 1, wherein, The air outlet holes are divided into two groups, each group of the air outlet holes is symmetrically distributed about the positioning mechanism, and each air outlet hole in each group of the air outlet holes is linearly arrayed.

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