A wheel welding device with rotatable workstations

Abstract

The present invention relates to the technical field of wheel welding, and specifically relates to a wheel welding device with a rotatable working station, including a base, a rim positioning part, a lifting part, a spoke plate positioning part, an adjusting part, a locking part, and a welding robot arm. The rim positioning part is fixedly installed on the top of the base for positioning the rim. The lifting part is fixedly installed on the top of the base, and the spoke plate positioning part is movably installed up and down on the top of the rim positioning part. The rim is positioned by the rim positioning part, and the outer top ring and the bottom of the inner top ring of the spoke plate positioning part are abutted against the upper surface of the spoke plate. Since the outer top ring is arranged as a complete circle, the top of the spoke plate can completely contact the bottom of the outer top ring, enabling precise positioning between the spoke plate and the rim. Compared with existing methods, the technical problem of excessive weld seams easily caused by lack of positioning at local positions is solved, and the quality of wheel welding is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel welding, and specifically to a wheel welding device with a rotatable working station. Background Art

[0002] A wheel is usually composed of a tire and a wheel hub. The wheel hub is a cylindrical metal part that supports the tire inside the tire profile and is centered on the shaft. There are many types of wheel hubs according to diameter, width, forming method, and material, and they are divided into forged and welded types. The welding process is to fix the rim and the spoke of the wheel hub together by welding. Therefore, welding equipment is indispensable for welding wheel hubs.

[0003] According to a Chinese patent with the application publication number CN117464232B, an aluminum alloy wheel hub welding device and a welding method are disclosed. By setting the rim to be clamped with two wheel flanges, and two welding machines respectively rotating and welding the joints of the rim and the two wheel flanges, the welding efficiency of the aluminum alloy wheel hub is improved. The output end of the electric cylinder extends to drive the extrusion disc to press against the outside of the wheel flange, and the output end of the servo motor rotates to drive the wheel flange and the rim to rotate and weld synchronously. Multiple side pressing plates are respectively attached to the outer wall of the rim to play a role in assisting in supporting the rim to prevent deviation. The grinding machine is attached to rotate at the welding joint to play a role in grinding the welding joint. The collection box is fixed below the wheel flange to collect the grinding waste chips.

[0004] After using the above-mentioned aluminum alloy wheel hub welding device, it is found that the above device presses and positions the middle part of the spoke through the extrusion disc. As the diameter of the wheel hub increases, that is, the distance between the extrusion disc and the wheel flange becomes farther. In this case, only by pressing the middle of the spoke, since the distance between the positioning point and the welding point is far, it is difficult to ensure that the weld between the spoke and the inner wall of the rim is tight. Therefore, we propose a wheel welding device with a rotatable working station to solve the above technical problems. Summary of the Invention

[0005] The present invention provides the following technical solutions: A wheel welding device with a rotatable working station, comprising:

[0006] A base;

[0007] A rim positioning part, fixedly installed on the top of the base for positioning the rim;

[0008] A lifting part, fixedly installed on the top of the base;

[0009] A spoke positioning part, vertically movably installed on the top of the rim positioning part, and the spoke positioning part is used for positioning the spoke;

[0010] An adjusting part, located inside the spoke positioning part, and the adjusting part is used to drive the spoke positioning part;

[0011] The locking part is located on the periphery of the spoke positioning part, and the spoke positioning part is used for the up and down positioning of the spoke positioning part.

[0012] As a preferred solution of the present invention, the rim positioning part includes:

[0013] The servo turntable is fixedly installed on the inner side of the upper surface of the base;

[0014] The pallet is located on the top of the base, and the bottom of the pallet is fixedly installed on the top of the output shaft of the servo turntable;

[0015] The cylinder fixing seat is fixedly installed on the top of the pallet. The number of the cylinder fixing seats is four, and the four cylinder fixing seats are distributed in a "cross shape" on the top of the pallet;

[0016] The servo cylinder is fixedly installed inside the cylinder fixing seat, and the number of the servo cylinders is four;

[0017] The chuck is fixedly installed at the end of the output rod of the servo cylinder, and the number of the chucks is four.

[0018] As a preferred solution of the present invention, the lifting part includes:

[0019] The guide rods are fixedly installed on the top of the base. The number of the guide rods is two, and the two guide rods are symmetrically distributed about the diagonal of the base;

[0020] The rodless cylinders are slidably installed on the outer walls of the guide rods, and the number of the rodless cylinders is two;

[0021] The lifting plate is fixedly installed at the bottoms of the two rodless cylinders.

[0022] As a preferred solution of the present invention, the spoke positioning part includes:

[0023] The plain bearing is fixedly installed at the bottom of the lifting plate;

[0024] The telescopic sleeve is rotatably installed at the bottom of the plain bearing;

[0025] The outer retaining ring is slidably installed inside the telescopic sleeve. The number of the outer retaining rings is multiple, and the multiple outer retaining rings are distributed in sequence inside and outside. The inner wall of the outer retaining ring on the outer side is slidably connected to the outer wall of one of the inner retaining rings;

[0026] The inner retaining ring is slidably installed inside one of the innermost outer retaining rings, and the outer wall of the inner retaining ring is slidably connected to the inner wall of one of the innermost outer retaining rings.

[0027] As a preferred solution of the present invention, the spoke positioning part further includes:

[0028] Derivation blocks are distributed in a "cross shape" on the top of the outer top ring and the top of the inner top ring. Insertion holes are penetrated through the adjacent surfaces of the derivation blocks;

[0029] Connecting columns are fixedly installed on the inner side of the lower surface of the inner top ring. The number of the inner top rings is four, and the four inner top rings are arranged at equal distances vertically and horizontally;

[0030] Horizontal plates are fixedly installed on the outer walls of the four connecting columns. The number of the horizontal plates is two, and the two horizontal plates are arranged in two layers, upper and lower;

[0031] A pushing cylinder is fixedly installed on the top of the lifting plate. A through hole is penetrated through the top of the telescopic sleeve. The output rod of the pushing cylinder movably penetrates through the through hole, and the bottom of the output rod of the pushing cylinder is rotatably connected to the top of one of the horizontal plates located in the upper layer.

[0032] As a preferred solution of the present invention, the adjusting part includes:

[0033] Guide rail frames are distributed in a "cross shape" inside the inner top ring. The number of the guide rail frames is four, and the bottoms of the four guide rail frames are fixedly connected to the inner side of the lower surface of the inner top ring;

[0034] Linear guide rails are symmetrically distributed on both sides of the top of the guide rail frame with the central axis of the guide rail frame as the symmetry axis;

[0035] Linear sliders are slidably installed on the periphery of the linear guide rails;

[0036] A loading plate is fixedly installed on the top of the linear slider;

[0037] Insertion rods are fixedly installed on the top of the loading plate. The insertion rods are inserted into the insertion holes located on the top of the inner top ring. The number of the insertion rods is four, and the four insertion rods are distributed in a "cross shape".

[0038] As a preferred solution of the present invention, the adjusting part further includes:

[0039] Rack bars are fixedly installed on the sides of the insertion rods. The number of the rack bars is four, and the four rack bars are equally divided into two layers, upper and lower, and are vertically and crosswise distributed. The two rack bars in the upper layer and the two rack bars in the lower layer are both arranged in parallel and offset;

[0040] A gear is located among the multiple rack bars, and the gear meshes with the four rack bars together;

[0041] A servo motor is fixedly installed on the top of one of the horizontal plates located in the lower layer. The output shaft of the servo motor penetrates through the horizontal plate and is fixedly connected to the inner wall of the gear.

[0042] As a preferred solution of the present invention, the locking part includes:

[0043] The lock head is slidably installed on the side wall of the telescopic sleeve along the radial direction of the telescopic sleeve, penetrates through the side wall of the telescopic sleeve, and extends to the inside and outside of the telescopic sleeve. The lock head is inserted into the jack located at the top of the outer top ring.

[0044] The sliding rod is fixedly installed inside the lock head along the radial direction of the telescopic sleeve, penetrates through the side wall of the telescopic sleeve, and extends to the inside and outside of the telescopic sleeve.

[0045] The return spring is located around the sliding rod. The return spring is fixedly installed between the inner wall of the telescopic sleeve and the inner wall of the lock head close to the insertion rod.

[0046] As a preferred solution of the present invention, the locking part further includes:

[0047] The metal baffle is fixedly installed on the top of the derivation block located at the top of the outer top ring. The side surface of the metal baffle close to the inner wall of the telescopic sleeve is flush with the side surface of the derivation block close to the inner wall of the telescopic sleeve.

[0048] As a preferred solution of the present invention, it further includes:

[0049] The welding robotic arm is fixedly arranged on the side of the base and is used for the welding and assembly of the rim and the spoke.

[0050] Compared with the prior art, the beneficial effects of the present invention are:

[0051] 1. In the present invention, the rim is positioned through the rim positioning part, and the outer top ring and the bottom of the inner top ring of the spoke positioning part are abutted against the upper surface of the spoke. Since the outer top ring is arranged as a complete circle, the top of the spoke can completely contact the bottom of the outer top ring, enabling precise positioning between the spoke and the rim. Compared with the existing means, it solves the technical problem that the weld seam is likely to be too large due to lack of positioning at local positions, and improves the quality of wheel welding.

[0052] 2. In the present invention, the servo motor of the adjustment part drives the gear to rotate, thereby pushing the four racks to move away from the center of the telescopic sleeve, causing the jack to move and driving the insertion rod to move together. The insertion rod is connected to the linear guide rail through the connection between the loading plate and the linear slider, which can enhance the stability of the movement of the insertion rod. During the process of the four insertion rods moving away from the center of the telescopic sleeve with the four racks, they are inserted into the jacks at the corresponding positions. When the insertion rod is inserted into the top of an outer top ring that matches the specifications of the hub to be welded, the device can adjust the positioning range adaptively according to different specifications of the hub, with strong flexibility.

[0053] 3. In the present invention, by moving the insertion rod, the lock head is pushed away from the center of the telescopic sleeve. The movement of the lock head drives the slide rod to move together, causing the return spring to be compressed and store potential energy, providing the return potential energy for the lock head and the slide rod, etc. Further, when the insertion rod is pushed downward, it also drives the jack inserted by it to move downward. The downward movement of the jack drives the outer top ring and the inner top ring located at its bottom downward through the connection of the derivation block. The downward movement of the above-mentioned derivation block also drives the metal baffle to move downward, blocking the inside of the remaining jacks not inserted by the insertion rod, thereby blocking the return effect of the return spring on the lock head, ensuring that the lock head is still inserted inside the remaining jacks not inserted by the insertion rod, thereby limiting the up and down movement of the derivation block in this part, that is, positioning the outer top ring at the bottom of this part of the derivation block up and down, so as to prevent the unused outer top ring from moving downward under the action of gravity and interfering with the normal welding of the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is a schematic structural diagram of the present invention;

[0055] Figure 2 is a schematic plan view of the present invention;

[0056] Figure 3 is a schematic structural diagram of the base and the rim positioning part in the present invention;

[0057] Figure 4 is a schematic detailed structural diagram of the rim positioning part in the present invention;

[0058] Figure 5 is a schematic side sectional view of the telescopic sleeve in the present invention;

[0059] Figure 6 is a schematic top view structure diagram of the spoke positioning part in the present invention;

[0060] Figure 7 is a schematic structural diagram of the inner top ring and the connecting column in the present invention;

[0061] Figure 8 is a schematic internal structure diagram of the inner top ring in the present invention;

[0062] Figure 9 is a schematic structural diagram of the adjusting part in the present invention;

[0063] Figure 10 In the present invention Figure 9 is an enlarged schematic view of part A;

[0064] Figure 11 is a schematic side sectional view of the outer top ring and the inner top ring in the present invention;

[0065] Figure 12 In the present invention Figure 11 is an enlarged schematic view of part B.

[0066] In the figure: 100, base; 200, rim positioning part; 201, servo turntable; 202, pallet; 203, cylinder fixing seat; 204, servo cylinder; 205, chuck; 300, lifting part; 301, guide rod; 302, rodless cylinder; 303, lifting plate; 400, spoke plate positioning part; 401, plain bearing; 402, telescopic sleeve; 4002, through hole; 403, outer retaining ring; 404, inner retaining ring; 405, derivation block; 406, jack; 407, connecting column; 408, horizontal plate; 409, pushing cylinder; 500, adjusting part; 501, guide rail frame; 502, linear guide rail; 503, linear slider; 504, loading plate; 505, insertion rod; 506, rack; 507, gear; 508, servo motor; 600, locking part; 601, lock head; 602, sliding rod; 603, return spring; 604, metal baffle; 700, welding robot arm. Specific embodiments

[0067] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0068] Please refer to Figures 1 to 12 , the technical solutions provided by the present invention specifically include the following embodiments:

[0069] A wheel welding device with a rotatable working station includes a base 100, a rim positioning part 200, a lifting part 300, a spoke plate positioning part 400, an adjusting part 500, a locking part 600, and a welding robot arm 700. The rim positioning part 200 is fixedly installed on the top of the base 100 for positioning the rim. The lifting part 300 is fixedly installed on the top of the base 100. The spoke plate positioning part 400 is movably installed up and down on the top of the rim positioning part 200. The spoke plate positioning part 400 is used for positioning the spoke plate. The adjusting part 500 is located inside the spoke plate positioning part 400 and is used to drive the spoke plate positioning part 400. The locking part 600 is located outside the spoke plate positioning part 400 and is used for the up and down positioning of the spoke plate positioning part 400. The welding robot arm 700 is fixedly arranged on the side of the base 100 for welding and assembling the rim and the spoke plate.

[0070] Further, specifically referring to Figure 4 as shown:

[0071] The rim positioning part 200 includes a servo turntable 201, a pallet 202, a cylinder fixing seat 203, a servo cylinder 204 and a chuck 205. The servo turntable 201 is fixedly installed on the inner side of the upper surface of the base 100. The pallet 202 is located on the top of the base 100. The bottom of the pallet 202 is fixedly installed on the top of the output shaft of the servo turntable 201. The cylinder fixing seat 203 is fixedly installed on the top of the pallet 202. The number of the cylinder fixing seats 203 is four, and the four cylinder fixing seats 203 are distributed in a "cross shape" on the top of the pallet 202. The servo cylinder 204 is fixedly installed inside the cylinder fixing seat 203. The number of the servo cylinders 204 is four. The chuck 205 is fixedly installed at the end of the output rod of the servo cylinder 204. The number of the chucks 205 is four.

[0072] Specifically, by placing the wheel rim on the top of the base 100 and outside the rim positioning part 200, and synchronously pushing out the output rods of the four servo cylinders 204 of the rim positioning part 200, the four chucks 205 are pushed outwards, so that the four chucks 205 abut against the inner wall of the wheel rim, thereby automatically positioning the wheel rim and ensuring the stability of the wheel rim during the welding process. During the welding process, the output shaft of the servo turntable 201 drives the pallet 202 to rotate, further driving the four cylinder fixing seats 203, the servo cylinders 204 and the chucks 205 to rotate together, thereby carrying the wheel rim and the spoke plate positioned by the four chucks 205 to rotate together and performing 360-degree rotary welding on them.

[0073] Further, specifically referring to Figure 2 as shown:

[0074] The lifting part 300 includes guide rods 301, a rodless cylinder 302 and a lifting plate 303. The guide rods 301 are fixedly installed on the top of the base 100. The number of the guide rods 301 is two, and the two guide rods 301 are symmetrically distributed about the diagonal of the base 100. The rodless cylinder 302 is slidably installed on the outer wall of the guide rod 301. The number of the rodless cylinders 302 is two. The lifting plate 303 is fixedly installed at the bottom of the two rodless cylinders 302.

[0075] Specifically, place the spoke plate on the top of the wheel rim so that the outer ring of the spoke plate fits against the inner wall of the wheel rim. The two rodless cylinders 302 move downward along the two guide rods 301. The downward movement of the two rodless cylinders 302, through the connection of the lifting plate 303, pushes the spoke plate positioning part 400 downward to abut against the upper surface of the spoke plate, positioning the spoke plate on the wheel rim and ensuring the stability of the spoke plate during the welding process.

[0076] Further, specifically referring to Figures 5 to 11 as shown:

[0077] The web positioning portion 400 includes a plain bearing 401, a telescopic sleeve 402, an outer top ring 403, an inner top ring 404, a derivation block 405, a jack hole 406, a connecting column 407, a horizontal plate 408, and a pushing cylinder 409. The plain bearing 401 is fixedly installed at the bottom of the lifting plate 303. The telescopic sleeve 402 is rotatably installed at the bottom of the plain bearing 401. The outer top ring 403 is slidably installed inside the telescopic sleeve 402. The number of outer top rings 403 is multiple, and the multiple outer top rings 403 are distributed in sequence inside and outside. The inner wall of the outer top ring 403 on the outside is slidably connected to the outer wall of one of the inner top rings 403. The inner top ring 404 is slidably installed inside one of the innermost outer top rings 403. The outer wall of the inner top ring 404 is slidably connected to the inner wall of one of the innermost outer top rings 403. The derivation blocks 405 are distributed in a "cross shape" on the top of the outer top ring 403 and the top of the inner top ring 404. Jack holes 406 are formed through the adjacent surfaces of the derivation blocks 405. The connecting column 407 is fixedly installed on the inner side of the lower surface of the inner top ring 404. The number of connecting columns 407 is four, and the four connecting columns 407 are arranged at equal distances vertically and horizontally. The horizontal plates 408 are fixedly installed on the outer walls of the four connecting columns 407. The number of horizontal plates 408 is two, and the two horizontal plates 408 are arranged in two layers, upper and lower. The pushing cylinder 409 is fixedly installed at the top of the lifting plate 303. A through hole 4002 is formed through the top of the telescopic sleeve 402. The output rod of the pushing cylinder 409 movably passes through the through hole 4002, and the bottom of the output rod of the pushing cylinder 409 is rotatably connected to the top of one of the upper horizontal plates 408;

[0078] The adjusting part 500 includes a guide rail frame 501, linear guide rails 502, linear sliders 503, a loading plate 504, insertion rods 505, racks 506, gears 507 and a servo motor 508. The guide rail frame 501 is distributed in the inner top ring 404 in a "cross" shape. The number of the guide rail frames 501 is four. The bottoms of the four guide rail frames 501 are fixedly connected to the inner side of the lower surface of the inner top ring 404. The linear guide rails 502 are symmetrically distributed on both sides of the top of the guide rail frame 501 with the central axis of the guide rail frame 501 as the symmetry axis. The linear sliders 503 are slidably installed on the periphery of the linear guide rails 502. The loading plate 504 is fixedly installed on the top of the linear sliders 503. The insertion rods 505 are fixedly installed on the top of the loading plate 504. The insertion rods 505 are inserted into the insertion holes 406 located at the top of the inner top ring 404. The number of the insertion rods 505 is four, and the four insertion rods 505 are distributed in a "cross" shape. The racks 506 are fixedly installed on the sides of the insertion rods 505. The number of the racks 506 is four, and the four racks 506 are equally divided into upper and lower layers and are vertically and crosswise distributed. The two upper racks 506 and the two lower racks 506 are both arranged in parallel and offset. The gear 507 is located among the multiple racks 506, and the gear 507 meshes with the four racks 506 together. The servo motor 508 is fixedly installed on the top of a horizontal plate 408 located in the lower layer. The output shaft of the servo motor 508 penetrates through the horizontal plate 408 and is fixedly connected to the inner wall of the gear 507.

[0079] Specifically, the pressing-down dimension of the spoke positioning part 400 is adjusted according to the specifications of the welded hub. Specifically, by starting the servo motor 508, its output shaft drives the gear 507 to rotate, thereby pushing the four racks 506 to move away from the center of the telescopic sleeve 402, causing the jack holes 406 to move and drive the insertion rods 505 to move together. The insertion rods 505 are connected to the linear guide rail 502 through the connection between the loading plate 504 and the linear slider 503, which can enhance the stability of the movement of the insertion rods 505. During the process of the four insertion rods 505 moving away from the center of the telescopic sleeve 402 along with the four racks 506, they are inserted into the corresponding jack holes 406. After the insertion rod 505 is inserted into the jack hole 406 at the top of an outer top ring 403 that matches the specifications of the hub to be welded, the servo motor 508 is immediately turned off. Then, the output rod of the pushing cylinder 409 pushes the horizontal plate 408 downward. The downward movement of the horizontal plate 408 drives the inner top ring 404, the guide rail frame 501, the insertion rods 505, etc. downward through the connection of the four connecting columns 407. The downward movement of the insertion rod 505 further drives the jack hole 406 it is inserted into to move downward. The downward movement of the jack hole 406 drives the outer top ring 403 and the inner top ring 404 at its bottom downward through the connection of the derivation block 405. The bottom of the inner top ring 404 and the outer top ring 403 pushed downward by the insertion rod 505 extend from the bottom of the telescopic sleeve 402. Subsequently, two rodless cylinders 302 are started, and the two rodless cylinders 302 move downward along the two guide rods 301. The downward movement of the two rodless cylinders 302 drives the spoke positioning part 400 downward through the connection of the lifting plate 303, so that the bottom of the outer top ring 403 and the inner top ring 404 extending from the bottom of the telescopic sleeve 402 abuts against the upper surface of the spoke. Subsequently, the welding robot arm 700 provided on the side of the base 100 welds the rim and the spoke together. Since the outer top ring 403 is provided as a complete circle, the top of the spoke can completely contact the bottom of the outer top ring 403, enabling precise positioning between the spoke and the rim. Compared with the existing means, the technical problem of excessive weld seams easily caused by lack of positioning at local positions is solved, and the quality of wheel welding is improved.

[0080] Further, specifically refer to Figure 6 , Figure 12 as shown in

[0081] The locking part 600 includes a lock head 601, a slide bar 602, a return spring 603 and a metal baffle 604. The lock head 601 is slidably mounted on the side wall of the telescopic sleeve 402 along the radial direction of the telescopic sleeve 402, penetrates through the side wall of the telescopic sleeve 402, and extends to the inside and outside of the telescopic sleeve 402. The lock head 601 is inserted into the jack 406 at the top of the outer top ring 403. The slide bar 602 is fixedly mounted inside the lock head 601 along the radial direction of the telescopic sleeve 402, penetrates through the side wall of the telescopic sleeve 402, and extends to the inside and outside of the telescopic sleeve 402. The return spring 603 is located around the slide bar 602. The return spring 603 is fixedly mounted between the inner wall of the telescopic sleeve 402 and the inner wall of the lock head 601 close to the plug rod 505. The metal baffle 604 is fixedly mounted on the top of the derivation block 405 at the top of the outer top ring 403. One side surface of the metal baffle 604 close to the inner wall of the telescopic sleeve 402 is flush with one side surface of the derivation block 405 close to the inner wall of the telescopic sleeve 402.

[0082] Specifically, during the process that the four plug rods 505 move away from the center of the telescopic sleeve 402 along with the four racks 506, they are inserted into the jacks 406 at corresponding positions. The movement of the plug rods 505 pushes the lock head 601 in the direction away from the center of the telescopic sleeve 402. The movement of the lock head 601 drives the slide bar 602 to move together, causing the return spring 603 to be compressed and store energy, providing the return potential energy for the lock head 601 and the slide bar 602, etc. The further downward push of the plug rods 505 also drives the jacks 406 inserted by them to move downward. The downward movement of the jacks 406 pushes the outer top ring 403 and the inner top ring 404 at its bottom downward through the connection of the derivation block 405. The downward movement of the above-mentioned derivation block 405 also drives the metal baffle 604 to move downward, blocking the inner side of the remaining jacks 406 not inserted by the plug rods 505, thereby blocking the return effect of the return spring 603 on the lock head 601, ensuring that the lock head 601 is still inserted into the remaining jacks 406 not inserted by the plug rods 505, thereby positioning the derivation block 405 at this part up and down, that is, positioning the outer top ring 403 at the bottom of this part of the derivation block 405 up and down, so as to prevent the unnecessary outer top ring 403 from moving downward under the action of gravity and interfering with the normal welding of the wheel hub.

[0083] When a wheel welding device with a rotatable working station in this solution works, the wheel rim is placed on the top of the base 100 and is placed outside the wheel rim positioning part 200. Through the synchronous outward advancement of the output rods of the four servo cylinders 204 of the wheel rim positioning part 200, the four chucks 205 are pushed outward, so that the four chucks 205 abut against the inner wall of the wheel rim, and then the wheel rim is automatically positioned.

[0084] After the rim is positioned, place the spoke on top of the rim so that the outer ring of the spoke fits against the inner wall of the rim. Here, it is necessary to adjust the pressing-down dimension of the spoke positioning portion 400 according to the specifications of the hub to be welded. Specifically, by starting the servo motor 508, its output shaft drives the gear 507 to rotate, thereby pushing the four racks 506 to move away from the center of the telescopic sleeve 402, causing the jack 406 to move and drive the plug 505 to move together. The plug 505 is guided and connected to the linear guide rail 502 through the connection between the loading plate 504 and the linear slider 503, which can enhance the stability of the movement of the plug 505. During the process of the four plugs 505 moving away from the center of the telescopic sleeve 402 with the four racks 506, they are inserted into the corresponding jacks 406. The movement of the plug 505 pushes the lock head 601 in the direction away from the center of the telescopic sleeve 402, and the movement of the lock head 601 drives the slide bar 602 to move together, causing the return spring 603 to be compressed and store energy, providing the return potential energy for the lock head 601 and the slide bar 602, etc. When the plug 505 is inserted into the jack 406 at the top of an outer top ring 403 that is adapted to the specifications of the hub to be welded, the servo motor 508 is immediately turned off;

[0085] Afterwards, the output rod of the pushing cylinder 409 pushes the horizontal plate 408 downward. The downward movement of the horizontal plate 408 drives the inner top ring 404, the guide rail frame 501, the insertion rod 505, etc. downward through the connection of the four connecting columns 407. The downward movement of the insertion rod 505 further drives the jack 406 inserted by it downward. The downward movement of the jack 406 drives the outer top ring 403 and the inner top ring 404 at its bottom downward through the connection of the derivation block 405. The downward movement of the above-mentioned derivation block 405 also drives the metal baffle 604 downward to block the inner side of the remaining jacks 406 not inserted by the insertion rod 505, thereby blocking the reset function of the reset spring 603 on the lock head 601, ensuring that the lock head 601 is still inserted inside the remaining jacks 406 not inserted by the insertion rod 505, thereby limiting the up and down movement of the derivation block 405 in this part, that is, positioning the outer top ring 403 at the bottom of the derivation block 405 in this part up and down. The inner top ring 404 pushed downward by the insertion rod 505 together with the bottom of the outer top ring 403 extends out from the bottom of the telescopic sleeve 402. Subsequently, two rodless cylinders 302 are started. The two rodless cylinders 302 move downward along the two guide rods 301. The downward movement of the two rodless cylinders 302 drives the spoke positioning part 400 downward through the connection of the lifting plate 303, so that the outer top ring 403 and the bottom of the inner top ring 404 extending out from the bottom of the telescopic sleeve 402 abut against the upper surface of the spoke. Subsequently, the welding robot arm 700 provided on the side of the base 100 welds the rim and the spoke together. During the welding process, the output shaft of the servo turntable 201 drives the support plate 202 to rotate, further driving the four cylinder fixing seats 203, the servo cylinders 204 and the chucks 205 to rotate together, and then carrying the rim and the spoke positioned by the four chucks 205 to rotate together for 360-degree rotary welding. Since the outer top ring 403 is arranged in a complete circle, the top of the spoke can completely contact the bottom of the outer top ring 403, enabling precise positioning between the spoke and the rim. Compared with the existing means, the technical problem of excessive weld seams easily caused by lack of positioning at local positions is solved, and the quality of wheel welding is improved.

[0086] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A wheel welding device with a rotatable workstation, characterized in that: include: base(100); A wheel rim positioning portion (200) is fixedly mounted on the top of the base (100) and is used for positioning the wheel rim; The lifting part (300) is fixedly mounted on the top of the base (100), and the lifting part (300) comprises: A guide rod (301) is fixedly mounted on the top of the base (100), wherein the number of the guide rods (301) is two, and the two guide rods (301) are symmetrically distributed about the diagonal line of the base (100); A rodless cylinder (302) is slidably mounted on the outer wall of the guide rod (301), and the number of the rodless cylinders (302) is two; A lifting plate (303) is fixedly mounted on the bottom of the two rodless cylinders (302); The spoke plate positioning part (400) is movably mounted on the top of the rim positioning part (200) in an up-and-down manner. The spoke plate positioning part (400) is used to position the spoke plate. The spoke plate positioning part (400) comprises: A plane bearing (401) is fixedly mounted on the bottom of the lifting plate (303); The telescopic sleeve (402) is rotatably mounted on the bottom of the plane bearing (401); An outer top ring (403) is slidably mounted inside the telescopic sleeve (402), wherein the outer top rings (403) are multiple in number, and the multiple outer top rings (403) are sequentially distributed inside and outside, and the inner wall of the outer top ring (403) on the outside is slidably connected to the outer wall of the inner outer top ring (403); An inner top ring (404) is slidably mounted inside the innermost outer top ring (403), and an outer wall of the inner top ring (404) is slidably connected to an inner wall of the innermost outer top ring (403); The web positioning portion (400) further comprises: The derivation blocks (405) are distributed in a "cross" shape at the top of the outer top ring (403) and the top of the inner top ring (404), and the adjacent surfaces of the derivation blocks (405) are penetrated by insertion holes (406); A connecting column (407) is fixedly mounted on the inner side of the lower surface of the inner top ring (404), wherein the number of the inner top rings (404) is four, and the four inner top rings (404) are arranged at equal distances in the vertical and horizontal directions; A horizontal plate (408) is fixedly mounted on the outer walls of the four connecting columns (407), wherein the number of the horizontal plates (408) is two, and the two horizontal plates (408) are arranged in two layers, upper and lower; A thrust cylinder (409) is fixedly mounted on the top of the lifting plate (303); a through hole (4002) is formed through the top of the telescopic sleeve (402); an output rod of the thrust cylinder (409) movably passes through the through hole (4002); and the bottom of the output rod of the thrust cylinder (409) is rotatably connected to the top of one of the horizontal plates (408) located on the upper layer; The adjusting portion (500) is located inside the web positioning portion (400). The adjusting portion (500) is used to drive the web positioning portion (400). The adjusting portion (500) comprises: The guide rail frames (501) are distributed in a "cross" shape inside the inner top ring (404), and there are four guide rail frames (501). The bottoms of the four guide rail frames (501) are fixedly connected to the inner side of the lower surface of the inner top ring (404); The linear guide rails (502) are symmetrically distributed on both sides of the top of the guide rail frame (501) with respect to the central axis of the guide rail frame (501); A linear slider (503) is slidably mounted on the periphery of the linear guide rail (502); A loading plate (504) is fixedly mounted on the top of the linear slider (503); An insertion rod (505) is fixedly mounted on the top of the loading plate (504), and the insertion rod (505) is inserted into the insertion hole (406) located at the top of the inner top ring (404). There are four insertion rods (505), and the four insertion rods (505) are distributed in a "cross shape"; The locking portion (600) is located at the periphery of the spoke plate positioning portion (400). The spoke plate positioning portion (400) is used for vertical positioning of the spoke plate positioning portion (400). The locking portion (600) comprises: A lock head (601) is slidably mounted on the side wall of the telescopic sleeve (402) along the radial direction of the telescopic sleeve (402), penetrates the side wall of the telescopic sleeve (402), and extends to the inside and outside of the telescopic sleeve (402), wherein the lock head (601) is plugged into the inside of the socket (406) located at the top of the outer top ring (403); The slide rod (602) is fixedly mounted inside the lock head (601) along the radial direction of the telescopic sleeve (402), penetrates the side wall of the telescopic sleeve (402), and extends to the inside and outside of the telescopic sleeve (402); The return spring (603) is located on the periphery of the slide rod (602), and the return spring (603) is fixedly installed between the inner wall of the telescopic sleeve (402) and the inner wall of the lock head (601) on one side close to the insertion rod (505).

2. The wheel welding equipment with rotatable workstations according to claim 1, characterized in that: The rim positioning portion (200) comprises: A servo turntable (201) is fixedly mounted on the inner side of the upper surface of the base (100); A support plate (202) is located on the top of the base (100), and the bottom of the support plate (202) is fixedly mounted on the top of the output shaft of the servo turntable (201); A cylinder fixing seat (203) is fixedly mounted on the top of the support plate (202), wherein the number of the cylinder fixing seats (203) is four, and the four cylinder fixing seats (203) are distributed in a "cross" shape on the top of the support plate (202); A servo cylinder (204) is fixedly mounted inside the cylinder fixing seat (203), and the number of the servo cylinders (204) is four; A chuck (205) is fixedly mounted on the end of the output rod of the servo cylinder (204), and the number of the chucks (205) is four.

3. The wheel welding equipment with rotatable workstations according to claim 2, characterized in that: The adjustment unit (500) further includes: A rack (506) is fixedly mounted on the side of the insertion rod (505), wherein the number of the racks (506) is four, and the four racks (506) are equally divided into two layers, and are vertically cross-distributed, and the two racks (506) on the upper layer and the two racks (506) on the lower layer are parallel and staggered; A gear (507) is located between the plurality of racks (506), wherein the gear (507) is meshed with the four racks (506); The servo motor (508) is fixedly mounted on the top of a horizontal plate (408) located at the lower layer. The output shaft of the servo motor (508) passes through the horizontal plate (408) and is fixedly connected to the inner wall of the gear (507).

4. The wheel welding equipment with rotatable workstations according to claim 3, characterized in that: The locking portion (600) further comprises: The metal baffle (604) is fixedly mounted on the top of the guide block (405) located on the top of the outer top ring (403), and a side surface of the metal baffle (604) close to the inner wall of the telescopic sleeve (402) is flush with a side surface of the guide block (405) close to the inner wall of the telescopic sleeve (402).

5. The wheel welding equipment with rotatable workstations according to claim 4, characterized in that: Also includes: The welding robot arm (700) is fixedly arranged on the side of the base (100) and is used for welding and assembling the rim and the spoke plate.

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