Lawn mower cover tailor-welding tool

Abstract

The invention relates to the technical field of hood welding, in particular to a mower hood tailor-welding tool which comprises a main body plate, a first clamping and rotating mechanism for limiting and clamping a mower supporting rod is arranged at the upper end of the main body plate, and the first clamping and rotating mechanism comprises a first limiting groove formed in the upper end of the main body plate; first fixing bodies are fixedly connected to the telescopic ends of the two first electric telescopic rods correspondingly, empty grooves are formed in the inner sides of the two first fixing bodies in a penetrating mode correspondingly, and a second clamping and rotating mechanism for clamping the mower hood is arranged at the upper end of the main body plate. A polishing and welding mechanism for polishing and welding the side surfaces of the supporting rods and the inner side of the hood is arranged at the upper end of the main body plate; the radian of the conical through hole in the inner side of the hood is consistent with the radian of the welding area of the supporting rod through the numerical value of the second pressure sensor, so that the side face of the supporting rod is completely attached to the conical through hole in the inner side of the hood, and the connecting strength of the supporting rod and the hood after welding is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hood welding, and in particular to a welding tool for a lawn mower hood. Background Art

[0002] A lawn mower is a mechanical device for mowing the lawn. It cuts the grass blades by a rotating blade or a shearing blade to keep the lawn neat and smooth. The most common structure of an existing lawn mower includes a support rod and a cutting head. A protective cover is welded in the contact area between the support rod and the cutting head to prevent the rotating head from driving foreign particles to injure the user. In order to improve the connection strength between the support rod and the protective cover, the existing support rod structure is a cone structure. The protective cover is generally a two-shell structure, which is connected by a buckle, and the inner side of the two half-shell structures is provided with a through hole that engages with the side of the support rod.

[0003] In the prior art, when welding the support rod and the protective hood, the side of the support rod and the inner side of the protective hood are generally grinded separately using sandpaper or the like, and then the two semi-shell structures of the hood are snap-connected to the side of the support rod. Then, the worker holds a welding gun and welds the welds where the inner sides of the two hoods contact the side of the support rod. This method cannot ensure that the side of the support rod with a cone structure is completely fitted with the inner side of the protective hood after grinding, thereby reducing the connection strength of the protective hood after welding. Manual welding is required during welding, which is very inefficient. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a lawn mower hood welding tool.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a lawn mower hood welding tool, including a main body plate, the upper end of the main body plate is provided with a first clamping and rotating mechanism for limiting and clamping the lawn mower support rod, the first clamping and rotating mechanism includes a first limiting groove opened on the upper end of the main body plate, two first limiting bodies are slidably fitted in the first limiting groove, the upper ends of the two first limiting bodies are respectively fixedly connected with a first electric telescopic rod, the telescopic ends of the two first electric telescopic rods are respectively fixedly connected with a first fixed body, the inner sides of the two first fixed bodies are respectively penetrated with empty grooves, the upper end of the main body plate is provided with a second clamping and rotating mechanism for clamping the lawn mower hood, and the upper end of the main body plate is provided with a grinding and welding mechanism for grinding and welding the side surfaces of the support rod and the inner side of the hood.

[0006] Preferably, the inner sides of the two first fixed bodies are respectively provided with rotating grooves communicated with the empty grooves, rotating rings are rotatably arranged in the two rotating grooves, the inner sides of the two rotating rings are respectively provided with four first placement grooves distributed at equal angles, the eight first placement grooves are respectively fixedly connected with second electric telescopic rods, and the telescopic ends of the eight second electric telescopic rods are respectively fixedly connected with anti-slip sheets.

[0007] Preferably, the sides of the two rotating rings are respectively fixedly connected with connecting rings, the sides of the two connecting rings are respectively fixedly connected with gear rings, the sides of the two first fixed bodies are respectively provided with second placement grooves, the two second placement grooves are respectively fixedly connected with second motors, the transmission shaft ends of the two second motors are respectively fixedly connected with gears, and the two gears are respectively meshed with the gear rings.

[0008] Preferably, a first motor is fixedly connected to the side surface of the main body plate, a transmission shaft end of the first motor is fixedly connected to a first threaded rod in a first limiting groove, and a side surface of the first threaded rod is threadedly matched with a first limiting body.

[0009] Preferably, the second clamping and rotating mechanism includes two second limiting grooves symmetrically opened on the upper end of the main body plate, the second limiting bodies are slidably fitted in the two second limiting grooves, the upper ends of the two second limiting bodies are fixedly connected with third electric telescopic rods, the telescopic ends of the two third electric telescopic rods are fixedly connected with second fixed bodies, and the inner sides of the two second fixed bodies are respectively provided with three equidistantly arranged third placement grooves.

[0010] Preferably, the six third placement grooves are respectively fixedly connected with fourth electric telescopic rods, the telescopic ends of the six fourth electric telescopic rods are respectively fixedly connected with first pressure sensors, the ends of the six first pressure sensors are respectively fixedly connected with third fixed bodies, fourth placement grooves are respectively opened on the sides of the six third fixed bodies, two of the third fixed bodies are respectively rotatably provided with rollers in the fourth placement grooves, fourth motors are respectively fixedly connected to the sides of the six third fixed bodies, and the drive shaft ends of the six fourth motors are respectively fixedly connected to the rollers.

[0011] Preferably, the side surfaces of the main body plate are respectively fixedly connected with third motors at positions close to the second limiting grooves, the transmission shaft ends of the two third motors are respectively fixedly connected with second threaded rods in the second limiting grooves, and the side surfaces of the two second threaded rods are respectively arranged with the second limiting bodies through threaded cooperation.

[0012] Preferably, the grinding and welding mechanism includes a fifth placement slot provided on the upper end of the main body plate, a fifth electric telescopic rod being fixedly connected in the fifth placement slot, a fifth motor being fixedly connected to the telescopic end of the fifth electric telescopic rod, a fourth fixed body being fixedly connected to the transmission shaft end of the fifth motor, a sixth placement slot and a seventh placement slot being respectively provided on both sides of the fourth fixed body, a sixth motor being fixedly connected to the side surface of the fourth fixed body at a position close to the sixth placement slot, and a welding gun being fixedly connected to the transmission shaft end of the sixth motor in the sixth placement slot.

[0013] Preferably, the side surface of the fourth fixed body is fixedly connected to a seventh motor at a position close to the seventh placement slot, the transmission shaft end of the seventh motor is fixedly connected to an eighth motor in the seventh placement slot, the transmission shaft end of the eighth motor is fixedly connected to a grinding rod, and the side surface of the grinding rod is connected to several second pressure sensors.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The fifth motor rotates the grinding rod to a position close to the side of the support rod, and then the eighth motor is started. The eighth motor drives the grinding rod to rotate. At the same time, the seventh motor drives the eighth motor to rotate to a position parallel to the side of the support rod, so as to grind the side of the support rod. While grinding, a number of second pressure sensors are arranged on the side of the grinding rod. The second pressure sensors can record the distance between the side of the support rod and the side of the grinding rod during grinding, so as to accurately obtain the curvature of the side of the support rod after grinding. Then the second pressure sensor transmits the signal to the controller. When the grinding of the support rod is completed, the first motor is started. The first motor drives the first threaded rod to rotate. The first threaded rod cooperates to drive the two first limit bodies to move to a position close to the first motor, and then the protective mechanisms of the two semi-shells are moved. The hoods are clamped together and placed between the two second fixed bodies, and then several fourth electric telescopic rods are extended at the same time, and the several fourth electric telescopic rods drive the rollers to be squeezed and fixed with the side of the hood, and then the fourth motor is started at the same time, and the fourth motor drives the hood to rotate. At the same time, the third motor is started, and the third motor drives the second limit body to move, and the hood is moved to a position that coincides with the previous side welding area of ​​the support rod, and the fifth electric telescopic rod is extended by a distance of the thickness of the hood, and the eighth motor is started to grind the tapered through hole on the inner side of the hood. During grinding, the value of the second pressure sensor is used to ensure that the curvature of the tapered through hole on the inner side of the hood is consistent with the curvature of the support rod welding area, so as to ensure that the side of the support rod is completely fitted with the tapered through hole on the inner side of the hood, thereby improving the connection strength of the support rod and the hood after welding; 2. The first motor drives the support rod to move, and then the two polished half-shell hoods are clamped on the sides of the support rod welding area, and several fourth electric telescopic rods are extended to fix the hood by rollers. Then the fourth motor and the second motor are started to rotate the support rod and the hood synchronously, and then the fifth motor is started to rotate the welding gun to a position close to the weld, and the sixth motor is started at the same time to weld the circular weld to improve the welding efficiency and welding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention is a sectional view of the whole Figure 1 ; Figure 3 The present invention is a sectional view of the whole Figure 2 ; Figure 4 The present invention is a sectional view of the whole Figure 3 ; Figure 5 For the present invention Figure 2 A magnified image of point A; Figure 6 For the present invention Figure 2 The enlarged view of point B; Figure 7 For the present invention Figure 3 Enlarged view of point C; Figure 8 For the present invention Figure 3 The enlarged view of point D; Fig. 9 For the present invention Figure 4 Enlarged view of point E.

[0016] 1. Main body plate; 2. First clamping and rotating mechanism; 3. Second clamping and rotating mechanism; 4. Grinding and welding mechanism; 21. First motor; 22. First threaded rod; 23. First position limiting body; 24. First electric telescopic rod; 25. First fixed body; 26. First position limiting groove; 27. Empty groove; 28. Rotation groove; 29. ​​Rotation ring; 210. First placement groove; 211. Second electric telescopic rod; 212. Anti-slip sheet; 213. Connecting ring; 214. Gear ring; 215. Gear; 216. Second placement groove; 217. Second motor; 31. Third motor; 32. Second position limiting groove; 33. Second limit body; 34, third electric telescopic rod; 35, second fixed body; 36, second threaded rod; 37, third placement slot; 38, fourth electric telescopic rod; 39, first pressure sensor; 310, third fixed body; 311, fourth placement slot; 312, roller; 313, fourth motor; 41, fifth placement slot; 42, fifth electric telescopic rod; 43, fifth motor; 44, fourth fixed body; 45, sixth placement slot; 46, sixth motor; 47, welding gun; 48, seventh placement slot; 49, seventh motor; 410, eighth motor; 411, grinding rod; 412, second pressure sensor. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] See also Figure 1-Figure 9 A lawn mower cover welding tool comprises a main body plate 1, and a first clamping and rotating mechanism 2 for limiting and clamping a lawn mower support rod is arranged on the upper end of the main body plate 1.

[0019] In this embodiment, the first clamping and rotating mechanism 2 includes a first limiting groove 26 opened at the upper end of the main plate 1, and two first limiting bodies 23 are slidably fitted in the first limiting groove 26. The upper ends of the two first limiting bodies 23 are respectively fixedly connected with first electric telescopic rods 24, and the telescopic ends of the two first electric telescopic rods 24 are respectively fixedly connected with first fixed bodies 25, and the inner sides of the two first fixed bodies 25 are respectively penetrated by empty grooves 27.

[0020] The inner sides of the two first fixed bodies 25 are respectively provided with rotating grooves 28 that are communicated with the empty grooves 27, and rotating rings 29 are rotatably arranged in the two rotating grooves 28. The inner sides of the two rotating rings 29 are respectively provided with four first placement grooves 210 distributed at equal angles, and the eight first placement grooves 210 are respectively fixedly connected with second electric telescopic rods 211, and the telescopic ends of the eight second electric telescopic rods 211 are respectively fixedly connected with anti-slip sheets 212.

[0021] The sides of the two rotating rings 29 are respectively fixedly connected with connecting rings 213, the sides of the two connecting rings 213 are respectively fixedly connected with gear rings 214, the sides of the two first fixed bodies 25 are respectively provided with second placement grooves 216, the two second placement grooves 216 are respectively fixedly connected with second motors 217, the transmission shaft ends of the two second motors 217 are respectively fixedly connected with gears 215, and the two gears 215 are respectively meshed with the gear rings 214.

[0022] A first motor 21 is fixedly connected to the side of the main body plate 1 , a transmission shaft end of the first motor 21 is fixedly connected to a first threaded rod 22 in a first limiting groove 26 , and a side of the first threaded rod 22 is threadedly matched with a first limiting body 23 .

[0023] Specifically, the anti-skid sheets 212 at the telescopic ends of the second electric telescopic rods 211 squeeze and fix the side of the support rod, and then the second motor 217 is started, the second motor 217 drives the gear 215 to rotate, the gear 215 engages to drive the gear ring 214 to rotate, the gear ring 214 drives the rotating ring 29 to rotate through the connecting ring 213, and the rotating ring 29 drives the support rod to rotate at a uniform speed through the anti-skid sheets 212.

[0024] In this embodiment, a second clamping and rotating mechanism 3 for clamping the lawn mower hood is disposed at the upper end of the main body plate 1 .

[0025] The second clamping and rotating mechanism 3 includes two second limiting grooves 32 symmetrically opened at the upper end of the main body plate 1, and the second limiting bodies 33 are slidably fitted in the two second limiting grooves 32 respectively. The upper ends of the two second limiting bodies 33 are fixedly connected with third electric telescopic rods 34 respectively, and the telescopic ends of the two third electric telescopic rods 34 are fixedly connected with second fixed bodies 35 respectively. The inner sides of the two second fixed bodies 35 are respectively provided with three equidistantly arranged third placement grooves 37.

[0026] The six third placement grooves 37 are respectively fixedly connected with fourth electric telescopic rods 38, the telescopic ends of the six fourth electric telescopic rods 38 are respectively fixedly connected with first pressure sensors 39, the ends of the six first pressure sensors 39 are respectively fixedly connected with third fixed bodies 310, the sides of the six third fixed bodies 310 are respectively provided with fourth placement grooves 311, two of the third fixed bodies 310 are respectively rotatably provided with rollers 312 in the fourth placement grooves 311, the sides of the six third fixed bodies 310 are respectively fixedly connected with fourth motors 313, and the transmission shaft ends of the six fourth motors 313 are respectively fixedly connected to the rollers 312.

[0027] The side surfaces of the main body plate 1 are fixedly connected with third motors 31 at positions close to the second limiting grooves 32, and the transmission shaft ends of the two third motors 31 are fixedly connected with second threaded rods 36 in the second limiting grooves 32, and the side surfaces of the two second threaded rods 36 are respectively arranged with the second limiting bodies 33 through threaded cooperation.

[0028] Specifically, several fourth electric telescopic rods 38 are extended at the same time, and the several fourth electric telescopic rods 38 drive the roller 312 to be squeezed and fixed to the side of the hood. Then, the fourth motor 313 is started at the same time, and the fourth motor 313 drives the hood to rotate. At the same time, the third motor 31 is started, and the third motor 31 drives the second limit body 33 to move, and the hood is moved to a position overlapping with the previous welding area on the side of the support rod.

[0029] In this embodiment, a grinding and welding mechanism 4 for grinding and welding the side surfaces of the support rods and the inner side of the hood is disposed at the upper end of the main body plate 1 .

[0030] The grinding and welding mechanism 4 includes a fifth placement slot 41 opened at the upper end of the main body plate 1, a fifth electric telescopic rod 42 is fixedly connected in the fifth placement slot 41, a fifth motor 43 is fixedly connected to the telescopic end of the fifth electric telescopic rod 42, a fourth fixed body 44 is fixedly connected to the transmission shaft end of the fifth motor 43, a sixth placement slot 45 and a seventh placement slot 48 are respectively opened on both sides of the fourth fixed body 44, a sixth motor 46 is fixedly connected to the side surface of the fourth fixed body 44 at a position close to the sixth placement slot 45, and a welding gun 47 is fixedly connected to the transmission shaft end of the sixth motor 46 in the sixth placement slot 45.

[0031] The side surface of the fourth fixed body 44 is fixedly connected to a seventh motor 49 at a position close to the seventh placement slot 48, the transmission shaft end of the seventh motor 49 is fixedly connected to an eighth motor 410 in the seventh placement slot 48, the transmission shaft end of the eighth motor 410 is fixedly connected to a grinding rod 411, and the side surface of the grinding rod 411 is connected to a plurality of second pressure sensors 412.

[0032] Specifically, the fifth electric telescopic rod 42 is extended, and the fifth motor 43 is started. The fifth motor 43 rotates the polishing rod 411 to a position close to the side of the support rod, and then the eighth motor 410 is started. The eighth motor 410 drives the polishing rod 411 to rotate. At the same time, the seventh motor 49 drives the eighth motor 410 to rotate to a position parallel to the side of the support rod, thereby polishing the side of the support rod. While polishing, a plurality of second pressure sensors 412 are provided on the side of the polishing rod 411. The second pressure sensors 412 can record the distance between the side of the support rod and the side of the polishing rod 411 during polishing, so as to accurately obtain the curvature of the side of the support rod after polishing.

[0033] When in use, the main body plate 1 is placed on a horizontal plane through the support column at the lower end, and then the support rod is placed in the empty groove 27 in the two first fixed bodies 25, and then a plurality of second electric telescopic rods 211 are extended at the same time, and the anti-skid sheets 212 at the telescopic ends of the plurality of second electric telescopic rods 211 squeeze and fix the side of the support rod, and then the second motor 217 is started, and the second motor 217 drives the gear 215 to rotate, and the gear 215 meshes and drives the gear ring 214 to rotate, and the gear ring 214 drives the rotating ring 29 to rotate through the connecting ring 213, and the rotating ring 29 drives the support rod to rotate at a uniform speed through the plurality of anti-skid sheets 212. At the same time, the fifth electric telescopic rod 42 is extended, and the fifth motor 43 is started. The fifth motor 43 rotates the grinding rod 411 to a position close to the side of the support rod, and then the eighth motor 410 is started. The eighth motor 410 drives the grinding rod 411 to rotate. At the same time, the seventh motor 49 drives the eighth motor 410 to rotate to a position parallel to the side of the support rod, so as to grind the side of the support rod. While grinding, a plurality of second pressure sensors 412 are provided on the side of the grinding rod 411. The second pressure sensors 412 can record the distance between the side of the support rod and the side of the grinding rod 411 during grinding, so as to accurately obtain The curvature of the side of the support rod after grinding is measured, and then the second pressure sensor 412 transmits a signal to the controller. When the support rod is polished, the first motor 21 is started, and the first motor 21 drives the first threaded rod 22 to rotate. The first threaded rod 22 cooperates to drive the two first limit bodies 23 to move to a position close to the first motor 21, and then the protective hoods of the two half shells are clamped together and placed between the two second fixed bodies 35. Then, a plurality of fourth electric telescopic rods 38 are extended at the same time, and the plurality of fourth electric telescopic rods 38 drive the roller 312 to be squeezed and fixed to the side of the hood, and then the fourth motor 3 is started at the same time. 13. The fourth motor 313 drives the hood to rotate. At the same time, the third motor 31 is started. The third motor 31 drives the second limit body 33 to move, and moves the hood to a position that overlaps with the previous side welding area of ​​the support rod. The fifth electric telescopic rod 42 is extended by a distance of the thickness of the hood. The eighth motor 410 is started to grind the tapered through hole on the inner side of the hood. During grinding, the value of the second pressure sensor 412 is used to ensure that the curvature of the tapered through hole on the inner side of the hood is consistent with the curvature of the support rod welding area, thereby ensuring that the side of the support rod is completely fitted with the tapered through hole on the inner side of the hood, thereby improving the connection strength between the support rod and the hood after welding.

[0034] When the grinding is completed, remove the hood, first place the support rod between the two first fixed bodies 25 again, fix it with the anti-slip sheet 212, then the first motor 21 drives the support rod to move, then the two polished half-shell hoods are clamped on the sides of the support rod welding area, and several fourth electric telescopic rods 38 are extended, and the hood is fixed by the roller 312, then the fourth motor 313 and the second motor 217 are started to rotate the support rod and the hood synchronously, then the fifth motor 43 is started, the welding gun 47 is rotated to a position close to the weld, and the sixth motor 46 is started at the same time to weld the circular weld to improve the welding efficiency and welding stability.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A lawn mower hood welding tool, comprising a main body plate (1), characterized in that: The upper end of the main body plate (1) is provided with a first clamping and rotating mechanism (2) for clamping the support rod of the lawn mower in a limited position. The first clamping and rotating mechanism (2) comprises a first limiting groove (26) provided at the upper end of the main body plate (1). Two first limiting bodies (23) are slidably fitted in the first limiting groove (26). The upper ends of the two first limiting bodies (23) are respectively fixedly connected to first electric telescopic rods (24). The telescopic ends of the two first electric telescopic rods (24) are respectively fixedly connected to first fixing bodies (25). The inner sides of the two first fixing bodies (25) are respectively penetrated by empty grooves (27). The upper end of the main body plate (1) is provided with a second clamping and rotating mechanism (3) for clamping the hood of the lawn mower. The upper end of the main body plate (1) is provided with a grinding and welding mechanism (4) for grinding and welding the side surfaces of the support rod and the inner side of the hood.

2. The lawn mower hood welding tool according to claim 1, characterized in that: The inner sides of the two first fixed bodies (25) are respectively provided with rotating grooves (28) communicating with the empty grooves (27); rotating rings (29) are rotatably arranged in the two rotating grooves (28); the inner sides of the two rotating rings (29) are respectively provided with four first placement grooves (210) distributed at equal angles; the eight first placement grooves (210) are respectively fixedly connected with second electric telescopic rods (211); and the telescopic ends of the eight second electric telescopic rods (211) are respectively fixedly connected with anti-slip sheets (212).

3. The lawn mower hood welding tool according to claim 2, characterized in that: The sides of the two rotating rings (29) are respectively fixedly connected with connecting rings (213), the sides of the two connecting rings (213) are respectively fixedly connected with gear rings (214), the sides of the two first fixed bodies (25) are respectively provided with second placement grooves (216), the two second placement grooves (216) are respectively fixedly connected with second motors (217), the transmission shaft ends of the two second motors (217) are respectively fixedly connected with gears (215), and the two gears (215) are respectively meshed with the gear rings (214).

4. The lawn mower hood welding tool according to claim 1, characterized in that: A first motor (21) is fixedly connected to the side surface of the main body plate (1); a transmission shaft end of the first motor (21) is fixedly connected to a first threaded rod (22) in a first limiting groove (26); and a side surface of the first threaded rod (22) is threadedly matched with a first limiting body (23).

5. The lawn mower hood welding tool according to claim 1, characterized in that: The second clamping and rotating mechanism (3) comprises two second limiting grooves (32) symmetrically arranged at the upper end of the main body plate (1), the second limiting bodies (33) respectively slidably fitted in the two second limiting grooves (32), the upper ends of the two second limiting bodies (33) respectively fixedly connected to third electric telescopic rods (34), the telescopic ends of the two third electric telescopic rods (34) respectively fixedly connected to second fixing bodies (35), and the inner side surfaces of the two second fixing bodies (35) respectively provided with three third placement grooves (37) arranged at equal distances.

6. The lawn mower hood welding tool according to claim 5, characterized in that: Fourth electric telescopic rods (38) are respectively fixedly connected in the six third placement grooves (37), the telescopic ends of the six fourth electric telescopic rods (38) are respectively fixedly connected to first pressure sensors (39), the ends of the six first pressure sensors (39) are respectively fixedly connected to third fixed bodies (310), fourth placement grooves (311) are respectively opened on the sides of the six third fixed bodies (310), two of the third fixed bodies (310) are respectively rotatably provided with rollers (312) in the fourth placement grooves (311), fourth motors (313) are respectively fixedly connected to the sides of the six third fixed bodies (310), and the transmission shaft ends of the six fourth motors (313) are respectively fixedly connected to the rollers (312).

7. The lawn mower hood welding tool according to claim 5, characterized in that: The side surfaces of the main body plate (1) are respectively fixedly connected to third motors (31) at positions close to the second limiting grooves (32); the transmission shaft ends of the two third motors (31) are respectively fixedly connected to second threaded rods (36) in the second limiting grooves (32); and the side surfaces of the two second threaded rods (36) are respectively arranged in threaded engagement with the second limiting bodies (33).

8. The lawn mower hood welding tool according to claim 1, characterized in that: The grinding and welding mechanism (4) comprises a fifth placement slot (41) provided at the upper end of the main body plate (1), a fifth electric telescopic rod (42) being fixedly connected in the fifth placement slot (41), a fifth motor (43) being fixedly connected at the telescopic end of the fifth electric telescopic rod (42), a fourth fixed body (44) being fixedly connected at the transmission shaft end of the fifth motor (43), a sixth placement slot (45) and a seventh placement slot (48) being respectively provided at two sides of the fourth fixed body (44), a sixth motor (46) being fixedly connected at a position close to the sixth placement slot (45) on the side surface of the fourth fixed body (44), and a welding gun (47) being fixedly connected at the transmission shaft end of the sixth motor (46) in the sixth placement slot (45).

9. The lawn mower hood welding tool according to claim 8, characterized in that: A seventh motor (49) is fixedly connected to the side surface of the fourth fixed body (44) at a position close to the seventh placement groove (48); an eighth motor (410) is fixedly connected to the transmission shaft end of the seventh motor (49) in the seventh placement groove (48); a polishing rod (411) is fixedly connected to the transmission shaft end of the eighth motor (410); and a plurality of second pressure sensors (412) are connected to the side surface of the polishing rod (411).

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