Welding tool for retroverted impeller of fan

Abstract

The invention relates to the technical field of fans, in particular to a fan retroverted impeller welding tool which comprises a welding frame, a fixing table is fixedly connected to the inner wall of the left side of the welding frame, a fixing disc is fixedly connected to the top of the fixing table, and a middle fixing mechanism is arranged on the inner side of the top of the fixing disc. By arranging the fixing table and the middle fixing mechanism, the main shaft of the fan retroverted impeller and the interior of the hub can be effectively fixed, so that the stability of the blade position is kept in the welding process, and the problem that the blade deviates from the preset position due to thermal deformation is avoided; after a motor is started, a transmission lead screw rotates, a transmission block moves along the lead screw, a rotating disc is pulled to rotate, the rotating disc rotates to drive a rotating rod and a rack rod, a sliding rod and a folding and expanding rod push a clamping plate to move in a sliding groove of the top disc, and meanwhile the rack rod moves to enable the rotating rod to rotate and push the middle fixing mechanism to move upwards.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and more particularly to a welding tool for a backward-inclined impeller of a fan. Background Art

[0002] The backward-inclined impeller of a fan refers to a fan in which the installation angle of the impeller blades is tilted backward relative to the rotation plane of the wind wheel. This design can effectively reduce wind resistance and improve the operating efficiency of the fan. In the welding tooling of the backward-inclined impeller of the fan, the welding quality of the impeller blades and the hub can be ensured by precisely controlling the welding position and welding parameters, thereby ensuring the overall stability and durability of the fan. For example, the use of advanced welding technologies such as laser welding or electron beam welding can achieve a high-precision and high-efficiency welding process while reducing the heat-affected zone and avoiding the degradation of material properties. In addition, the tooling design may also include devices for precisely positioning and fixing the impeller blades to ensure that the blades maintain the correct angle and position during the welding process to achieve the performance indicators required by the design.

[0003] According to the patent document: CN111140536A, a semi-open split flow small flow high pressure centrifugal fan impeller is disclosed. It comprises streamlined long blades, outlet split short blades, impeller rear disc, semi-open front disc, and shaft sleeve. The streamlined long blades are evenly distributed and welded on the impeller rear disc. The streamlined long blades are divided into three sections, a forward-inclined inlet section, an oblique middle section, and a slightly backward-inclined outlet section. The inlet angle of the streamlined long blades is 43°, and the outlet angle is 100°. The outlet split short blades are evenly distributed and welded in the middle of the outlet flow channel of the streamlined long blades. The semi-open front disc is a double arc type, welded to the inlet section of the streamlined long blades, and the shaft sleeve is located in the middle of the semi-open front disc. After adopting the above technical solution, the beneficial effects of the present invention are: it improves the operating efficiency of the fan, can reduce noise and manufacturing difficulty, and ensures the safe operation of the fan.

[0004] When welding a backward-inclined impeller, the usual practice is to first splice the main shaft and the hub, and then place the spliced ​​components together on a welding table for welding. However, most welding table designs on the market currently have certain limitations. They can often only effectively fix the outer wall of the main shaft and the hub, and this fixing method cannot extend to the inside of the main shaft and the hub. Therefore, during the welding process, due to the influence of thermal effects, the blades may undergo thermal deformation, causing the blades to deviate from their predetermined positions. This deviation will not only directly affect the quality of the welding operation, but may also further affect the overall performance and use of the impeller. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding tool for a backward-inclined impeller of a fan. The technical problem to be solved by the present invention is that most welding tables can usually only fix the outer wall of the main shaft and the hub, but cannot effectively fix the inside of the main shaft and the hub. As a result, during the welding process, the blades may deviate from the predetermined position due to thermal deformation, thereby affecting the welding quality and the overall performance of the impeller.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A fan backward-inclined impeller welding tool comprises a welding frame, a left inner wall of the welding frame is fixedly connected to a fixing platform, a top of the fixing platform is fixedly connected to a fixing plate, and a middle fixing mechanism is arranged on the inner side of the top of the fixing plate;

[0008] The fixed plate comprises a bottom fixed plate, and the top of the bottom fixed plate is fixedly connected to a top plate;

[0009] The bottom fixed plate includes a chassis, a motor placement rod is fixedly connected to one side of the outer wall of the chassis, a connecting rod is fixedly connected to the outer circular array at the top of the chassis, and a turntable connecting plate is fixedly connected to the inner side of multiple connecting rods at the top of the chassis.

[0010] As a further solution of the present invention: the top of the turntable connecting plate is rotatably connected to a turntable, the inner wall of the turntable is fixedly connected to a plurality of inner teeth in a circular array, the top of the turntable is rotatably connected to an outer slide groove plate, the top of the chassis is fixedly connected to a middle placement plate on one side of the inner side of the turntable, the top outer side of the middle placement plate is fixedly connected to a middle placement plate slide groove plate, and the outer wall of the middle placement plate slide groove plate and the outer wall of the outer slide groove plate are both provided with slide grooves in a circular array.

[0011] As a further solution of the present invention: the top of the chassis is rotatably connected to a rotating rod in a circular array on one side of the turntable and the inner side of the middle placement plate, and the tops and bottoms of the outer walls of the multiple rotating rods are fixedly connected to gears, and the outer walls of the multiple gears at the bottom are meshed with multiple internal tooth blocks fixed on the inner wall of the turntable.

[0012] As a further solution of the present invention: a motor is fixedly connected to the top front side of the motor placement rod, a lead screw is fixedly connected to the output end of the motor, a transmission block is threadedly connected to the outer wall of the lead screw, a pull rod is fixedly connected to the side of the transmission block close to the turntable, and the pull rod is rotatably connected to the outer wall of the turntable on the side away from the transmission block.

[0013] As a further solution of the present invention: the top plate includes a top plate body, the top annular array of the top plate body is provided with a top plate slide groove extending to the bottom, the inner walls of multiple top plate slide grooves are slidably connected with expansion rods, the outer tops of multiple expansion rods are fixedly connected with splints, the bottoms of multiple expansion rods extend to the bottom of the top plate body, the inner bottoms of multiple expansion rods are fixedly connected with sliding rods, and the tops of multiple sliding rods are fixedly connected with rack rods.

[0014] As a further solution of the present invention: the outer walls of the multiple sliding rods are respectively slidably connected to the inner walls of the multiple groups of sliding grooves, one side of the multiple rack rods is meshed with the outer wall of the top gear, and the top inner sides of the multiple rack rods are rotatably connected to a rotating rod.

[0015] As a further solution of the present invention: the central fixing mechanism includes a central fixing mechanism chassis, the outer wall of the central fixing mechanism chassis is rotatably connected in an annular array to a side of multiple rotating rods away from the rack rod, and the bottom of the central fixing mechanism chassis is movably connected to the middle of the central placement plate and the top plate body.

[0016] As a further solution of the present invention: a hydraulic push rod is fixedly connected to the top of the middle fixed mechanism chassis, and connecting blocks are fixedly connected to the top and the top of the outer wall of the hydraulic push rod in a circular array, and the outer walls of multiple connecting blocks at the top are rotatably connected to the fixed mechanism rotating rods, and the sides of multiple fixed mechanism rotating rods away from the top connecting block are rotatably connected to the inner support plate, and the inner tops of multiple inner support plates are rotatably connected to the second fixed mechanism rotating rods, and the outer middle parts of multiple second fixed mechanism rotating rods are respectively rotatably connected to the inner middle parts of multiple fixed mechanism rotating rods, and the sides of multiple second fixed mechanism rotating rods away from the inner support plate are respectively rotatably connected to the outer walls of multiple connecting blocks at the bottom.

[0017] As a further solution of the present invention: the fixed platform includes two fixed platform support rods, the tops of the two fixed platform support rods are fixedly connected to the fixed platform bottom plate, the top four sides of the fixed platform bottom plate are movably connected to vertical screw rods, and the outer walls of the plurality of vertical screw rods are threadedly connected to transmission plates.

[0018] As a further solution of the present invention: an inner groove plate is fixedly connected to the middle part of the top of the transmission plate, a worm motor base is fixedly connected to the side of the top of the transmission plate close to the inner groove plate, the top of the worm motor base is fixedly connected to the worm motor, and the output end of the worm motor is fixedly connected to the worm, the inner wall of the inner groove plate is rotatably connected to the pressure plate chassis, the inner wall annular array of the pressure plate chassis is fixedly connected to a pressure block, the top of the pressure plate chassis is fixedly connected to a pressure plate top plate, the bottom of the pressure plate top plate is rotatably connected to the top of the inner groove plate, and the outer wall annular array of the pressure plate top plate is fixedly connected to a pressure plate tooth block, and the outer walls of a plurality of the pressure plate tooth blocks are meshed with the outer wall of the worm.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention can effectively fix the main shaft of the backward-inclined impeller of the fan and the inside of the hub by providing a fixing platform and a middle fixing mechanism, so as to keep the blade position stable during the welding process and avoid the problem of deviation from the predetermined position caused by thermal deformation. Specifically, after the worker manually splices the main shaft and the hub, he puts it on the outer wall of the fixing mechanism and places it on the top of the top plate. After starting the motor, the transmission screw rotates, the transmission block moves along the screw, pulls the turntable to rotate, and the rotation of the turntable drives the rotating rod and the rack rod, so that the sliding rod and the expansion rod push the clamping plate to move in the top plate slide groove to fix the main shaft and the hub. At the same time, the rack rod moves to rotate the rotating rod, pushes the middle fixing mechanism to move upward, tightens the main shaft and the hub, and starts the hydraulic push rod to move the top plate downward to ensure stability and accuracy during welding. This tooling design can adapt to main shafts and hubs of different sizes, realize fast and accurate positioning and fixing, and improve welding efficiency and quality.

[0021] 2. The present invention is provided with a fixed table, which can automatically adjust the position of the pressure plate top plate, so as to achieve precise adjustment of the position of the pressure block so that it can be completely aligned with the groove opened on the outer wall of the main shaft. Specifically, the worm motor is started, and its rotation drives the worm and the pressure plate top plate to rotate, and the position of the pressure block is precisely adjusted to align with the groove on the outer wall of the main shaft. Subsequently, the bottom plate of the fixed table is started, the transmission plate descends, the bottom plate of the pressure plate presses the main shaft and the top of the wheel hub, and the pressure block is stuck in the slot. At this time, the staff can weld the inner side of the pressure block and the outer contour of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the fixing platform, the fixing plate and the middle fixing mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing plate and the middle fixing mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional separation structure of the fixing plate and the middle fixing mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional separation structure of the fixed disk of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom fixing plate of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the top plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the middle fixing mechanism of the present invention;

[0030] Fig. 9 It is a schematic diagram of the three-dimensional separation structure of the middle fixing mechanism of the present invention;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the fixing platform of the present invention.

[0032] In the figure: 1, welding frame; 2, fixed table; 21, fixed table support rod; 22, fixed table bottom plate; 23, vertical screw rod; 24, transmission plate; 25, inner slide plate; 26, worm motor base; 27, worm motor; 28, worm; 29, pressure plate top plate; 210, pressure plate bottom plate; 211, pressure plate tooth block; 212, pressure block; 3, fixed plate; 31, bottom fixed plate; 311, bottom plate; 312, motor placement rod; 313, connecting rod; 314, turntable connecting plate; 315, middle placement plate; 316, middle placement plate slide plate; 317, outer slide plate; 318, Slide groove; 319, rotating rod; 3110, gear; 3111, rotating plate; 3112, inner gear block; 3113, motor; 3114, transmission block; 3115, pull rod; 3116, screw rod; 32, top plate; 321, top plate body; 322, top plate slide groove; 323, expansion rod; 324, splint; 325, slide rod; 326, rack rod; 327, rotating rod; 4, middle fixing mechanism; 41, middle fixing mechanism chassis; 42, hydraulic push rod; 43, connecting block; 44, fixing mechanism rotating rod; 45, inner support plate; 46, second fixing mechanism rotating rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, the present invention provides a welding tool for a backward-inclined impeller of a fan, comprising a welding frame 1, a fixing platform 2 is fixedly connected to the left inner wall of the welding frame 1, a fixing plate 3 is fixedly connected to the top of the fixing plate 2, and a middle fixing mechanism 4 is arranged on the inner side of the top of the fixing plate 3.

[0035] like Figure 2-9As shown, the fixed plate 3 includes a bottom fixed plate 31, the top of the bottom fixed plate 31 is fixedly connected to a top plate 32, the bottom fixed plate 31 includes a bottom plate 311, one side of the outer wall of the bottom plate 311 is fixedly connected to a motor placement rod 312, the outer ring array on the top of the bottom plate 311 is fixedly connected to a connecting rod 313, the top of the bottom plate 311 is fixedly connected to a turntable connecting plate 314 on the inner side of a plurality of connecting rods 313, the top of the turntable connecting plate 314 is rotatably connected to a turntable 3111, the inner wall ring array of the turntable 3111 is fixedly connected to a plurality of inner gear blocks 3112, the top of the turntable 3111 is rotatably connected to an outer slide groove plate 317, the top of the bottom plate 311 is fixedly connected to a middle placement plate 315 on one side of the inner side of the turntable 3111, and the middle placement plate 315 is fixedly connected to a middle placement plate 316 on the inner side of the turntable 3111. The top outer side of 15 is fixedly connected with a middle placement plate slide plate 316, and the outer wall of the middle placement plate slide plate 316 and the outer wall of the outer slide plate 317 are both provided with slide grooves 318 in an annular array. The top of the bottom plate 311 is rotatably connected with a rotating rod 319 on one side of the rotating disk 3111 and the inner side of the middle placement plate 315. The top and bottom of the outer walls of the plurality of rotating rods 319 are fixedly connected with gears 3110, and the outer walls of the plurality of gears 3110 at the bottom are meshed with a plurality of internal gear blocks 3112 fixed on the inner wall of the rotating disk 3111. The top front side of the motor placement rod 312 is fixedly connected with a motor 3113, and the output end of the motor 3113 is fixedly connected with a screw rod 3116, and the outer wall of the screw rod 3116 is threadedly connected with a transmission block 3114, and the transmission block 3114 is threadedly connected. A pull rod 3115 is fixedly connected to one side of the turntable 3111 near the turntable 3111, and the pull rod 3115 is rotatably connected to the outer wall of the turntable 3111 at the side away from the transmission block 3114. The top plate 32 includes a top plate body 321, and the top annular array of the top plate body 321 is provided with a top plate slide groove 322 that runs through to the bottom. The inner walls of multiple top plate slide grooves 322 are slidably connected to expansion rods 323, and the outer tops of multiple expansion rods 323 are fixedly connected to clamp plates 324. The bottoms of multiple expansion rods 323 extend to the bottom of the top plate body 321, and the inner bottoms of multiple expansion rods 323 are fixedly connected to sliding rods 325, and the tops of multiple sliding rods 325 are fixedly connected to rack rods 326. The outer walls of multiple sliding rods 325 are slidably connected to multiple The inner wall of the group slide groove 318, one side of multiple rack rods 326 are all meshed with the outer wall of the top gear 3110, the top inner sides of multiple rack rods 326 are rotatably connected with rotating rods 327, the middle fixing mechanism 4 includes a middle fixing mechanism chassis 41, the outer wall of the middle fixing mechanism chassis 41 is rotatably connected to the side of multiple rotating rods 327 away from the rack rod 326 in an annular array, the bottom of the middle fixing mechanism chassis 41 is movably connected to the middle of the middle placement plate 315 and the top plate body 321, the top of the middle fixing mechanism chassis 41 is fixedly connected with a hydraulic push rod 42, the top of the outer wall of the hydraulic push rod 42 is fixedly connected with a connecting block 43 in an annular array with the top, and the outer walls of the multiple connecting blocks 43 at the top are rotatably connected with the fixing mechanism rotating rod 44,The sides of the multiple fixing mechanism rotating rods 44 away from the top connecting block 43 are all rotatably connected to the inner supporting plate 45, the inner tops of the multiple inner supporting plates 45 are all rotatably connected to the second fixing mechanism rotating rods 46, the outer middle parts of the multiple second fixing mechanism rotating rods 46 are respectively rotatably connected to the inner middle parts of the multiple fixing mechanism rotating rods 44, and the sides of the multiple second fixing mechanism rotating rods 46 away from the inner supporting plate 45 are respectively rotatably connected to the outer walls of the multiple bottom connecting blocks 43;

[0036] When the spindle and the hub are manually pressed and spliced ​​together, the worker puts the middle inner wall of the spliced ​​spindle and the hub on the outer wall of the middle fixing mechanism 4. At the same time, the spindle and the hub are placed on the top of the top plate 32, and then the motor 3113 is started. After the motor 3113 is started, the transmission screw 3116 rotates, so that the transmission block 3114 moves axially on the outer wall of the screw 3116, so that the turntable 3111 is pulled by the pull rod 3115 to rotate on the top of the turntable connecting plate 314. When the turntable 3111 rotates, the multiple inner tooth blocks 3112 on the inner wall are engaged. The multiple gears 3110 at the bottom drive the multiple rotating rods 319 to rotate. After the multiple rotating rods 319 rotate, the multiple rack rods 326 are meshed with the gears 3110 at the top to move inward on the inner walls of the multiple groups of slide grooves 318. The multiple rack rods 326 move inward, thereby driving the multiple slide rods 325 and the expansion rods 323 to drive the clamping plates 324 to move inward on the inner walls of the top plate slide grooves 322 opened in the top plate body 321, so that the multiple clamping plates 324 are fixed to the outer walls of the main shaft and the wheel hub, and the main shaft and the wheel hub are fixed to the top of the top plate body 321;

[0037] At the same time, when the multiple rack rods 326 move inward, they also drive the multiple rotating rods 327 to rotate, and then push the middle fixing mechanism 4 to move upward as a whole through the multiple rotating rods 327, so that the outer wall of the middle fixing mechanism 4 is completely covered on the inner wall of the middle part of the main shaft and the wheel hub, and then start the hydraulic push rod 42, and the hydraulic push rod 42 starts to push the top of the hydraulic push rod 42 to move downward. When the top of the hydraulic push rod 42 moves downward, the fixing mechanism rotating rod 44 and the second fixing mechanism rotating rod 46 are driven to rotate through the connecting block 43, and then the inner support plate 45 is pushed to expand outward to further fix the main shaft and the middle part of the wheel hub. The downward movement of the hydraulic push rod 42 ensures the stability and centering accuracy of the main shaft and the wheel hub during welding. Through this design, the tooling can adapt to main shafts and wheel hubs of different sizes, and achieve fast and accurate positioning and fixation, which greatly improves the efficiency and quality of welding operations.

[0038] like Fig.10As shown, the fixed platform 2 includes two fixed platform support rods 21, the tops of the two fixed platform support rods 21 are fixedly connected to the fixed platform bottom plate 22, the top four sides of the fixed platform bottom plate 22 are movably connected to the vertical screw rods 23, the outer walls of the plurality of vertical screw rods 23 are threadedly connected to the transmission plate 24, the middle of the top of the transmission plate 24 is fixedly connected to the inner slide plate 25, the top of the transmission plate 24 is fixedly connected to the side of the inner slide plate 25, and the top of the worm motor base 26 is fixedly connected to the worm motor 2 7. The output end of the worm motor 27 is fixedly connected with a worm 28, the inner wall of the inner slot plate 25 is rotatably connected with a pressure plate bottom plate 210, the inner wall annular array of the pressure plate bottom plate 210 is fixedly connected with a pressure block 212, the top of the pressure plate bottom plate 210 is fixedly connected with a pressure plate top plate 29, the bottom of the pressure plate top plate 29 is rotatably connected to the top of the inner slot plate 25, the outer wall annular array of the pressure plate top plate 29 is fixedly connected with a pressure plate tooth block 211, and the outer walls of the plurality of pressure plate tooth blocks 211 are meshed with the outer wall of the worm 28;

[0039] After the main shaft and the wheel hub are fixed, the worm motor 27 is started. The rotation of the worm motor 27 drives the worm 28 to rotate. The rotation of the worm 28 meshes with the pressure plate tooth block 211, so that the pressure plate top plate 29 rotates on the top of the inner slide groove plate 25, thereby realizing the precise adjustment of the position of the pressure block 212 so that it can be completely aligned with the groove opened on the outer wall of the main shaft. After that, the fixed table bottom plate 22 is started to move the transmission plate 24 downward through the vertical screw 23 so that the pressure plate bottom plate 210 is pressed on the top of the main shaft and the wheel hub, and at the same time, the pressure block 212 is stuck in the slot hole opened on the main shaft and the wheel hub. At this time, the staff can use the welding nozzle to weld the positions reserved for the inner main shaft and the outer contour of multiple pressure blocks 212.

[0040] The working principle of the present invention is as follows: after the main shaft and the wheel hub are manually pressed and spliced ​​together, the middle inner wall of the spliced ​​main shaft and the wheel hub is sleeved on the outer wall of the middle fixing mechanism 4. At the same time, the main shaft and the wheel hub are placed on the top of the top plate 32, and then the motor 3113 is started. After the motor 3113 is started, the transmission screw 3116 rotates, so that the transmission block 3114 moves axially on the outer wall of the screw 3116, so that the turntable 3111 is pulled by the pull rod 3115 to rotate on the top of the turntable connecting plate 314, and the turntable When the plurality of inner teeth blocks 3112 on the inner wall engage with the plurality of gears 3110 at the bottom, thereby driving the plurality of rotating rods 319 to rotate. After the plurality of rotating rods 319 rotate, the plurality of rack rods 326 engage with the gears 3110 at the top and move inwardly along the inner walls of the plurality of groups of slide grooves 318. The plurality of rack rods 326 move inwardly, thereby driving the plurality of slide rods 325 and the expansion rods 323 to drive the clamping plate 324 to move inwardly along the inner walls of the top plate slide grooves 322 opened by the top plate body 321, thereby making the top plate body 321 A plurality of clamping plates 324 are fixed on the outer wall of the main shaft and the wheel hub, and the main shaft and the wheel hub are fixed on the top of the top plate body 321. At the same time, when the plurality of rack rods 326 move inward, the plurality of rotating rods 327 are driven to rotate at the same time, and then the middle fixing mechanism 4 is pushed upward as a whole through the plurality of rotating rods 327, so that the outer wall of the middle fixing mechanism 4 is completely sleeved on the middle inner wall of the main shaft and the wheel hub, and then the hydraulic push rod 42 is started, and the hydraulic push rod 42 is started to push the top of the hydraulic push rod 42 to move downward. When the top of the hydraulic push rod 42 moves downward, the fixing mechanism rotating rod 44 and the second fixing mechanism rotating rod 46 are driven to rotate through the connecting block 43, and then the inner support plate 45 is pushed to expand outward to further fix the main shaft and the middle of the wheel hub. The downward movement of the hydraulic push rod 42 ensures the stability and centering accuracy of the main shaft and the wheel hub during welding. Through this design, the tooling can adapt to main shafts and wheel hubs of different sizes, realize fast and accurate positioning and fixing, and greatly improve the efficiency and quality of welding operations.

[0041] After the main shaft and the wheel hub are fixed, the worm motor 27 is started. The rotation of the worm motor 27 drives the worm 28 to rotate. The rotation of the worm 28 meshes with the pressure plate tooth block 211, so that the pressure plate top plate 29 rotates on the top of the inner slide groove plate 25, thereby realizing the precise adjustment of the position of the pressure block 212 so that it can be completely aligned with the groove opened on the outer wall of the main shaft. After that, the fixed table bottom plate 22 is started to move the transmission plate 24 downward through the vertical screw 23 so that the pressure plate bottom plate 210 is pressed on the top of the main shaft and the wheel hub, and at the same time, the pressure block 212 is stuck in the slot hole opened on the main shaft and the wheel hub. At this time, the staff can use the welding nozzle to weld the positions reserved for the inner main shaft and the outer contour of multiple pressure blocks 212.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding tool for a backward-inclined impeller of a fan, comprising a welding frame (1), characterized in that: A fixing platform (2) is fixedly connected to the left inner wall of the welding frame (1), a fixing plate (3) is fixedly connected to the top of the fixing platform (2), and a middle fixing mechanism (4) is arranged on the inner side of the top of the fixing plate (3); The fixed plate (3) comprises a bottom fixed plate (31), and a top plate (32) is fixedly connected to the top of the bottom fixed plate (31); The bottom fixed plate (31) comprises a bottom plate (311), a motor placement rod (312) is fixedly connected to one side of an outer wall of the bottom plate (311), a connecting rod (313) is fixedly connected to the outer ring array at the top of the bottom plate (311), and a rotating disk connecting plate (314) is fixedly connected to the inner side of a plurality of connecting rods (313) at the top of the bottom plate (311).

2. A fan backward-inclined impeller welding tool according to claim 1, characterized in that: The top of the turntable connecting plate (314) is rotatably connected to a turntable (3111); the inner wall of the turntable (3111) is fixedly connected to a plurality of inner gear blocks (3112) in a circular array; the top of the turntable (3111) is rotatably connected to an outer slide groove plate (317); the top of the chassis (311) is fixedly connected to a middle placement plate (315) on one side of the inner side of the turntable (3111); the top outer side of the middle placement plate (315) is fixedly connected to a middle placement plate slide groove plate (316); the outer wall of the middle placement plate slide groove plate (316) and the outer wall of the outer slide groove plate (317) are both provided with slide grooves (318) in a circular array.

3. A fan backward-inclined impeller welding tool according to claim 2, characterized in that: The top of the chassis (311) is rotatably connected to a rotating rod (319) in a circular array on one side of the inner side of the rotating disk (3111) and the middle placement disk (315); the top and bottom of the outer walls of the plurality of rotating rods (319) are fixedly connected to gears (3110); the outer walls of the plurality of gears (3110) at the bottom are meshed with a plurality of internal gear blocks (3112) fixed to the inner wall of the rotating disk (3111).

4. A fan backward-inclined impeller welding tool according to claim 1, characterized in that: The top front side of the motor placement rod (312) is fixedly connected to a motor (3113), the output end of the motor (3113) is fixedly connected to a lead screw (3116), the outer wall of the lead screw (3116) is threadedly connected to a transmission block (3114), the side of the transmission block (3114) close to the turntable (3111) is fixedly connected to a pull rod (3115), and the side of the pull rod (3115) away from the transmission block (3114) is rotatably connected to the outer wall of the turntable (3111).

5. The backward-inclined impeller welding tool for a fan according to claim 1, characterized in that: The top plate (32) includes a top plate body (321), the top annular array of the top plate body (321) is provided with a top plate slide groove (322) extending to the bottom, the inner walls of the plurality of top plate slide grooves (322) are slidably connected with expansion rods (323), the outer tops of the plurality of expansion rods (323) are fixedly connected with a clamping plate (324), the bottoms of the plurality of expansion rods (323) extend to the bottom of the top plate body (321), the inner bottoms of the plurality of expansion rods (323) are fixedly connected with a slide rod (325), and the tops of the plurality of slide rods (325) are fixedly connected with a rack rod (326).

6. A fan backward-inclined impeller welding tool according to claim 5, characterized in that: The outer walls of the plurality of sliding rods (325) are respectively slidably connected to the inner walls of the plurality of sliding grooves (318), one side of the plurality of rack rods (326) is meshed with the outer wall of the top gear (3110), and the inner sides of the tops of the plurality of rack rods (326) are rotatably connected to a rotating rod (327).

7. The backward-inclined impeller welding tool for a fan according to claim 1, characterized in that: The middle fixing mechanism (4) comprises a middle fixing mechanism chassis (41), the outer wall of the middle fixing mechanism chassis (41) is rotatably connected in a circular array to a side of a plurality of rotating rods (327) away from the rack rod (326), and the bottom of the middle fixing mechanism chassis (41) is movably connected to the middle of the middle placement plate (315) and the top plate body (321).

8. A fan backward-inclined impeller welding tool according to claim 7, characterized in that: The top of the middle fixed mechanism chassis (41) is fixedly connected to a hydraulic push rod (42), the top of the outer wall of the hydraulic push rod (42) and the top are respectively fixedly connected to connecting blocks (43) in a circular array, the outer walls of the multiple connecting blocks (43) at the top are all rotatably connected to fixed mechanism rotating rods (44), the sides of the multiple fixed mechanism rotating rods (44) away from the top connecting block (43) are all rotatably connected to an inner support plate (45), the inner tops of the multiple inner support plates (45) are all rotatably connected to a second fixed mechanism rotating rod (46), the outer middle parts of the multiple second fixed mechanism rotating rods (46) are respectively rotatably connected to the inner middle parts of the multiple fixed mechanism rotating rods (44), and the sides of the multiple second fixed mechanism rotating rods (46) away from the inner support plate (45) are respectively rotatably connected to the outer walls of the multiple connecting blocks (43) at the bottom.

9. The backward-inclined impeller welding tool for a fan according to claim 1, characterized in that: The fixed platform (2) comprises two fixed platform support rods (21), the tops of the two fixed platform support rods (21) are fixedly connected to a fixed platform bottom plate (22), the four sides of the top of the fixed platform bottom plate (22) are movably connected to vertical screw rods (23), and the outer walls of the plurality of vertical screw rods (23) are threadedly connected to transmission plates (24).

10. A fan backward-inclined impeller welding tool according to claim 9, characterized in that: The transmission plate (24) is fixedly connected to an inner groove plate (25) at the middle of the top, and a worm motor base (26) is fixedly connected to the side of the top of the transmission plate (24) close to the inner groove plate (25). The top of the worm motor base (26) is fixedly connected to a worm motor (27). The output end of the worm motor (27) is fixedly connected to a worm (28). The inner wall of the inner groove plate (25) is rotatably connected to a pressure plate base (210). The inner wall of the pressure plate base (210) is fixedly connected to a pressure block (212) in an annular array. The top of the pressure plate base (210) is fixedly connected to a pressure plate top plate (29). The bottom of the pressure plate top plate (29) is rotatably connected to the top of the inner groove plate (25). The outer wall of the pressure plate top plate (29) is fixedly connected to a pressure plate tooth block (211) in an annular array. The outer walls of the plurality of pressure plate tooth blocks (211) mesh with the outer wall of the worm (28).

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