A lawn mower shaft assembly welding mechanism

Abstract

The present invention provides a lawn mower shaft assembly welding mechanism, which belongs to the technical field of lawn mower manufacturing. It solves the problem that the existing lawn mower shaft sleeve cannot be stably clamped. The lawn mower shaft assembly welding mechanism includes two fixed seats, each of which has a rotating seat that can rotate relative to the fixed seat. The two rotating seats are arranged opposite to each other, and one of the fixed seats is provided with a driving member for driving the rotating seat to rotate. The rotating seat includes a limit plate that can fit with the disc of the lawn mower shaft assembly. The limit plate is provided with a notch for one end of the main shaft of the lawn mower shaft assembly to pass through. The limit plate is provided with a clamping structure for pressing the disc and making the disc fit with the limit plate. The lawn mower shaft assembly welding mechanism also includes a support seat located between the two rotating seats and capable of rising and falling relative to the rotating seat, and the support seat can be used for placing the sleeve. The lawn mower shaft assembly welding mechanism can realize the rapid clamping of the sleeve while improving the stability of the sleeve rotation.

Description

Technical Field

[0001] The invention belongs to the technical field of lawn mower manufacturing and relates to a lawn mower shaft assembly welding mechanism. Background Art

[0002] A lawn mower is a livestock machinery that can cut grass or other crops that can be made into hay and spread them on the ground, and the lawn mower shaft assembly is an important component of the lawn mower. The lawn mower shaft assembly includes a lawn mower shaft and a blade arranged on the lawn mower shaft. When the lawn mower cuts, the lawn mower shaft rotates, and the blade on the lawn mower shaft cuts the crops in the ground. For example, a Chinese patent application discloses a lawn mower shaft assembly for a lawn mower [Authorization Announcement No.: CN207519153U], including a main shaft, a sleeve rigidly connected to the outside of the main shaft, the sleeve is a hollow cylindrical structure, and a plurality of knife seats are irregularly distributed on the surface of the sleeve. The knife seat is a hollow structure, and a blade is inserted into the knife seat. The two half shafts of the main shaft are respectively arranged on both sides of the sleeve and are fastened to the inner wall of the sleeve through a support ring. The support ring is a spoke, and the edge of the support ring is connected to the inner wall of the sleeve through a key. An axial hole is arranged in the middle of the support ring for installing the main shaft, and the axial hole and the main shaft are connected by a key. The surfaces of the tool holder and the sleeve of this patent are connected by welding or the tool holder is fixed to the sleeve by fasteners. The installation and fixation of the tool holder on the sleeve is generally performed manually. Since the cylindrical sleeve is prone to rolling, in order to improve the installation efficiency of the tool holder on the sleeve, the sleeve must be positioned by a positioning fixture. If the sleeve is clamped on the positioning fixture, since the outer circumference of the sleeve is the welding part of the tool holder, the positioning fixture will occupy the area of ​​the outer circumference of the sleeve, causing interference with the installation of the tool holder. In addition, the sleeve is hollow, and the sleeve is prone to deformation when clamped and subjected to force, thereby destroying the structure of the sleeve.

[0003] like Figure 1 As shown, the existing lawn mower shaft assembly includes a sleeve 11 and two main shafts 12 respectively arranged at both ends of the sleeve 11, and a disc 13 is arranged at both ends of the sleeve 11. The main shaft 12 is fixed on the disc 13, and the main shaft 12 and the disc 13 are welded together. The sleeve 11 and the disc 13 are welded together.

[0004] Therefore, when positioning the sleeve, the main shafts at both ends of the sleeve are respectively clamped on the corresponding positioning tooling. In order to cover the entire outer circumference of the sleeve with the knife seat, the sleeve needs to be rotated from time to time during the installation of the knife seat. During this process, the main shaft is easily worn, which in turn affects the installation of the mower shaft assembly on the mower.

[0005] At present, the Chinese patent application also discloses a synchronous welding device for the reel blade of a lawn mower reel [application publication number: CN106271273A], which includes a bracket, a reel shaft fixing device, an annular welding disk and a plurality of linear welding devices. The reel fixing device includes a fixing seat arranged on the upper part of the bracket and a motor driving the fixing seat to rotate, and the motor is fixedly arranged on the top of the bracket. When the reel shaft fixing device is used to fix the sleeve of the above patent, it is necessary to rotate the sleeve so that it is vertically arranged, and then fix the main shaft at the upper end of the sleeve on the fixing seat, which makes it inconvenient to clamp the sleeve. The sleeve is vertically arranged so that the gravity of the sleeve acts entirely on the main shaft. As the knife seat is successively installed on the sleeve, the weight of the sleeve becomes heavier and heavier, and the main shaft is subjected to an increasingly greater downward force. There is a risk of fracture between the sleeve and the main shaft. In addition, after the sleeve is positioned by the reel shaft fixing device, the sleeve is in a suspended state as a whole. The motor drives the main shaft to rotate through the fixing seat, thereby driving the sleeve to rotate. When the sleeve rotates, it is easy to shake, thereby affecting the installation of the knife seat on the sleeve. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems in the prior art and propose a lawn mower shaft assembly welding mechanism. The technical problem to be solved by the present invention is: how to achieve rapid clamping of the sleeve while improving the stability of the sleeve rotation.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A lawn mower shaft assembly welding mechanism comprises two fixed seats, wherein each fixed seat is provided with a rotating seat capable of rotating relative to the fixed seat, the two rotating seats are arranged opposite to each other, one of the fixed seats is provided with a driving member for driving the rotating seat to rotate, the rotating seat comprises a limiting plate capable of fitting with a circular disc of the lawn mower shaft assembly, the limiting plate is provided with a notch for one end of the main shaft of the lawn mower shaft assembly to pass through, the limiting plate is provided with a clamping structure for clamping the circular disc and fitting the circular disc with the limiting plate, the lawn mower shaft assembly welding mechanism also comprises a supporting seat located between the two rotating seats and capable of rising and falling relative to the rotating seat, the supporting seat can be used for placing a sleeve.

[0009] Working principle: Move the mower shaft assembly to the top of the mower shaft assembly welding mechanism so that the two main shafts correspond to the two notches one by one, the support seat rises, and then the mower shaft assembly is lowered so that the main shaft is located in the notch, and the disc is abutted against the limit plate. The notch plays a guiding role, so that the mower shaft assembly can be lowered along the notch during the lowering process. When the mower shaft assembly is lowered to abut against the support seat, the sleeve is placed on the support seat under the action of gravity. When the mower shaft assembly is positioned on the welding mechanism, the sleeve can be quickly placed on the support seat. The support seat has an upward lifting force on the sleeve. At this time, the clamping structure presses the disc against the limit plate to achieve rapid clamping of the mower shaft assembly. When the driving member drives one of the rotating seats to rotate, it drives the mower shaft assembly to rotate. The welding mechanism clamps the disc of the mower shaft assembly. At this time, the welding mechanism does not affect the area of ​​the outer circumference of the sleeve, ensuring that the outer circumference of the sleeve has sufficient blade installation area. After clamping, the mower assembly is placed flat, and the discs at both ends of the mower shaft assembly are pressed against the corresponding limit plates. The contact area between the discs and the limit plates is large, so that the two ends of the sleeve are stably connected to the rotating seat. After the sleeve is placed flat, the two discs are subjected to force at the same time, the sleeve and the disc are not easy to break, and the stable rotation of the sleeve is ensured.

[0010] In the above-mentioned lawn mower shaft assembly welding mechanism, the vertical cross-section of the notch is U-shaped.

[0011] The shape of the notch makes the placement of the main shaft more convenient and plays a guiding role. When in use, when the main shaft is located in the notch, there may be a gap between the inner wall of the notch and the main shaft. This design makes the distance between the two inner walls of the notch significantly larger than the outer diameter of the main shaft, so that the main shaft and the notch do not need to be precisely aligned, and a certain alignment error between the main shaft and the notch is allowed, which further improves the stability of the sleeve during rotation.

[0012] In the above-mentioned lawn mower shaft assembly welding mechanism, the support seat includes a base, a support frame located above the base, and a cylinder 1 fixed on the base and driving the support frame to rise and fall. The support frame also includes a bottom plate fixed to the piston rod of the cylinder 1 and a support plate arranged on the bottom plate, and the support plate is provided with a flared groove with an opening facing upward.

[0013] Since the sleeve is hollow, when the blade is welded to the sleeve, the weight of the sleeve where the blade is welded increases due to the gradual welding of the blade. Therefore, a support seat is provided to support the sleeve, reduce the deformation of the sleeve, and improve the stability of welding. The support frame on the support seat can be moved up and down by cylinder 1, and the setting of the expansion groove makes the placement of the sleeve faster, thereby improving the clamping efficiency of the sleeve. During use, when the welded blade rotates to interfere with the support plate, the support frame can be lowered by cylinder 1, further ensuring the stability and convenience of the welding mechanism of the entire mower shaft assembly during welding, making the rotation of the sleeve smoother and more stable. At the same time, the support seat also realizes the rapid positioning of the sleeve, thereby facilitating the rapid clamping of the sleeve.

[0014] In the above-mentioned lawn mower shaft assembly welding mechanism, the support seat also includes a guide rod with one end fixedly connected to the base plate, and the other end of the guide rod is penetrated on the base and can slide vertically along the base.

[0015] The setting of the guide rod can ensure that the support frame can slide up and down stably without position deviation, avoiding the collision of the support frame with the sleeve when sliding up and down, and also ensure that the support frame can provide the sleeve with horizontal upward support force, so that the sleeve can be stably set on the support frame, further improving the stability of the support seat setting.

[0016] In the above-mentioned lawn mower shaft assembly welding mechanism, the expansion groove has two inclined guide surfaces and a horizontal bottom surface, and the two inclined guide surfaces are respectively located on both sides of the bottom surface.

[0017] The setting of the guide surface and the bottom surface reduces the contact area between the expansion groove and the sleeve. When the sleeve is placed in the expansion groove, it is easier to guide the sleeve through the inclined guide surface. The contact area between the guide surface and the sleeve is small and there is no arc shape, so the sleeve will not be limited, thereby avoiding the phenomenon that the sleeve is difficult to remove during the removal process. At the same time, when the sleeve specifications are different, since the wall surfaces of the expansion groove are all flat, at this time, only the outer wall of the sleeve needs to be able to abut against the guide surface or the bottom surface, so as to achieve support and positioning of the sleeve, thereby improving the applicability of the support seat.

[0018] In the above-mentioned lawn mower shaft assembly welding mechanism, the rotating seat includes a rotating shaft rotatably set on a fixed seat, a base plate fixed on the rotating shaft and arranged opposite to the limiting plate, and a U-shaped block located between the limiting plate and the base plate, the closed end of the U-shaped block is connected to the base plate, and the open end of the U-shaped block is connected to the limiting plate.

[0019] The setting of the U-shaped block enhances the connection strength between the fixed seat and the rotating seat. The setting of the U-shaped block enables one end of the main shaft to be set in the U-shaped block when in use, which can play a role in giving way to the main shaft, thereby facilitating the unloading of the lawn mower shaft assembly after subsequent welding, and increasing the weight of the rotating seat close to the fixed seat, so that the driving member in the fixed seat uses a larger driving force to stably drive the lawn mower shaft assembly to rotate, avoiding the situation where the rotating seat rotates but the lawn mower shaft assembly does not rotate, and further improving the stability of the welding mechanism.

[0020] In the above-mentioned lawn mower shaft assembly welding mechanism, the rotating seat further includes a plurality of cross bars located between the limiting plate and the base plate, one end of the cross bar is fixedly connected to the limiting plate, and the other end is fixedly connected to the base plate.

[0021] The arrangement of this structure enhances the connection strength between the limiting plate and the base plate, thereby improving the ability of the base plate and the limiting plate to stably and synchronously rotate when the rotating seat is rotated.

[0022] In the above-mentioned lawn mower shaft assembly welding mechanism, the clamping structure includes a pressing plate located on one side of the limiting plate and a second cylinder arranged on the limiting plate and driving the pressing plate to approach or move away from the limiting plate.

[0023] By setting a pressure plate and cylinder two, the disc can be pressed against the limit plate, and cylinder two is directly set on the limit plate to avoid interference with other components of the welding mechanism, which facilitates the installation of the clamping structure. Setting cylinder two on the limit plate can also provide a supporting force to the limit plate corresponding to the pressure of the pressure plate, further improving the stability of the disc setting.

[0024] In the above-mentioned lawn mower shaft assembly welding mechanism, the clamping structure also includes a positioning column located between the limit plate and the pressure plate, the pressure plate is arranged parallel to the limit plate, one end of the positioning column is fixedly connected to the pressure plate, and the positioning column and the pressure plate are arranged vertically, and the other end of the positioning column can press the disc against the limit plate.

[0025] The arrangement of this structure enables the pressure plate to move along the axial direction of the sleeve. The pressure plate can provide a vertical force to be transmitted to the positioning column. The positioning column presses the disc against the limit plate, so that the clamping structure can press the disc against the limit plate with less effort, thereby improving the stability of the welding mechanism in clamping and positioning the lawn mower shaft assembly.

[0026] In the above-mentioned lawn mower shaft assembly welding mechanism, the driving member is a motor, and the rotating shaft is connected to the motor shaft of the motor.

[0027] The arrangement of this structure makes the rotation of the rotating seat more stable, and the rotation of the rotating seat is controlled by the motor, thereby improving the stability of the rotation of the rotating seat.

[0028] Compared with the prior art, the lawn mower shaft assembly welding mechanism of the present invention has the following advantages:

[0029] 1. By clamping the discs at both ends of the sleeve, the welding mechanism does not affect the area of ​​the outer circumference of the sleeve, ensuring that there is enough blade installation area on the outer circumference of the sleeve. The contact area between the disc and the limit plate is large, so that the two ends of the sleeve are stably connected to the rotating seat. When the sleeve is placed flat, the two discs are subjected to force at the same time, and the sleeve and the disc are not easy to break, ensuring the stable rotation of the sleeve.

[0030] 2. By setting the notch and the expansion groove on the support seat, the sleeve can be set and positioned on the welding mechanism more quickly, further improving the positioning efficiency of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the welding mechanism of the lawn mower shaft assembly.

[0032] Figure 2 It is a structural schematic diagram of a support seat in the welding mechanism of the lawn mower shaft assembly.

[0033] Figure 3 It is a cross-sectional view of the welding mechanism of the lawn mower shaft assembly.

[0034] Figure 4 yes Figure 1 A partial enlarged view of point A in the middle.

[0035] Figure 5 The present invention is a partial structural diagram of a rotary seat of the lawn mower shaft assembly welding mechanism after assembly.

[0036] Figure 6 The present invention is a structural schematic diagram of the lawn mower shaft assembly welding mechanism being assembled on a lawn mower production line.

[0037] Figure 7 It is a structural schematic diagram of the gripping robot in the lawn mower production line.

[0038] In the figure, 1. lawn mower shaft assembly: 11. sleeve; 12. main shaft; 13. disc; 14. blade; 2. fixed seat; 21. rotating seat; 211. limit plate; 212. notch; 213. rotating shaft; 214. base plate; 215. U-shaped block; 216. U-shaped groove; 217. cross bar; 22. driving member; 3. clamping structure; 31. pressure plate; 32. cylinder two; 33. positioning column; 4. support seat; 41. base; 42. support frame; 421. bottom plate; 422. support plate; 423. flaring groove; 424. guide surface; 425. bottom surface; 43. cylinder one; 431. piston rod; 44. guide rod; 5. gap; 6. welding robot; 7. clamping robot; 71. clamping claw; 72. spring. DETAILED DESCRIPTION

[0039] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0040] Embodiment 1

[0041] like Figure 1 As shown, the lawn mower shaft assembly welding mechanism, the lawn mower shaft assembly 1 includes a sleeve 11 and two main shafts 12 respectively arranged at both ends of the sleeve 11.

[0042] Specifically, Figure 1-7 As shown, discs 13 are provided at both ends of the sleeve 11, and the main shaft 12 is fixed on the discs 13. The lawn mower shaft assembly welding mechanism includes two fixed seats 2, each of which has a rotating seat 21 that can rotate relative to the fixed seat 2. The two rotating seats 21 are arranged opposite to each other, and one of the fixed seats 2 is provided with a driving member 22 for driving the rotating seat 21 to rotate. The rotating seat 21 includes a limiting plate 211, and a notch 212 is opened on the limiting plate 211. One end of the main shaft 12 passes through the notch 212, and the disc 13 abuts against the limiting plate 211. The limiting plate 211 is provided with a pressing structure 3 for pressing the disc 13 and making the disc 13 fit the limiting plate 211. The lawn mower shaft assembly welding mechanism also includes a support seat 4 located between the two rotating seats 21 and capable of rising and falling relative to the rotating seat 21, and the support seat 4 can be used for placing the sleeve 11.

[0043] Working principle: The mower shaft assembly 1 is moved to the top of the mower shaft assembly welding mechanism, so that the two main shafts 12 correspond to the two notches 212 one by one, the support seat 4 rises, and then the mower shaft assembly 1 is lowered, so that the main shaft 12 is located in the notch 212, and the disc 13 is against the limit plate 211, and the notch 212 plays a guiding role, so that the mower shaft assembly 1 can be lowered along the notch 212 during the lowering process. When it is against the support seat 4, the sleeve 11 is placed on the support seat 4 under the action of gravity. When the mower shaft assembly is positioned on the welding mechanism, the sleeve 13 can be quickly placed on the support seat 4. The support seat 4 has an upward lifting force on the sleeve 13. At this time, the clamping structure 3 presses the disc 13 on the limit plate 211 to achieve rapid clamping of the mower shaft assembly 1. When the driving member 22 drives one of the rotating seats 21 to rotate, it further drives the mower shaft assembly 1 to rotate. The welding mechanism clamps the discs 13 at both ends of the sleeve 11. At this time, the welding mechanism does not affect the area of ​​the outer circumferential surface of the sleeve 11, ensuring that the outer circumferential surface of the sleeve 11 has sufficient installation area for the blade 14. After clamping, the lawn mower assembly is placed flat, and the discs 13 at both ends of the lawn mower shaft assembly 1 are pressed against the corresponding limit plates 211. The contact area between the discs 13 and the limit plates 211 is large, so that the two ends of the sleeve 11 are stably connected to the rotating seat 21. After the sleeve 11 is placed flat, the two discs 13 are subjected to force at the same time, the sleeve 11 and the disc 13 are not easy to break, and the stable rotation of the sleeve 11 is ensured.

[0044] like Figure 1 and Figure 4 As shown, the longitudinal section of the notch 212 is U-shaped. When in use, there is a gap 5 between the wall of the notch 212 and the main shaft 12 .

[0045] like Figure 2 and Figure 3 As shown, the support seat 4 includes a base 41, a support frame 42 located above the base 41, and a cylinder 43 fixed on the base 41 and driving the support frame 42 to rise and fall. There are two cylinders 43, and the support frame 42 also includes a bottom plate 421 fixedly connected to the piston rod 431 of the cylinder 43 and a support plate 422 arranged on the bottom plate 421. The two cylinders 43 are respectively arranged at the two ends of the bottom plate 421, and there are two support plates 422. The two support plates 422 are respectively arranged at the two ends of the bottom plate 421, and an expanding groove 423 with an opening facing upward is opened on the support plate 422. The support seat 4 also includes a guide rod 44 with one end fixedly connected to the bottom plate 421, and the other end of the guide rod 44 is penetrated through the base 41 and can slide vertically along the base 41. The expanding groove 423 has two inclined guide surfaces 424 and a horizontal bottom surface 425, and the two inclined guide surfaces 424 are respectively located on both sides of the bottom surface 425.

[0046] The support seat 4 can also use a screw motor to drive the support frame 42 to move up and down.

[0047] like Figure 3 and Figure 4 As shown, the rotating seat 21 includes a rotating shaft 213 rotatably set on the fixed seat 2, a base plate 214 fixed on the rotating shaft 213 and arranged opposite to the limiting plate 211, and a U-shaped block 215 located between the limiting plate 211 and the base plate 214, the closed end of the U-shaped block 215 is connected to the base plate 214, and the open end of the U-shaped block 215 is connected to the limiting plate 211. When in use, the main shaft 12 is located in the U-shaped groove 216 of the U-shaped block 215. The rotating seat 21 also includes a plurality of cross bars 217 located between the limiting plate 211 and the base plate 214, one end of the cross bar 217 is fixedly connected to the limiting plate 211, and the other end is fixedly connected to the base plate 214.

[0048] like Figure 5 As shown, the clamping structure 3 includes a pressing plate 31 located on one side of the limiting plate 211 and a cylinder 2 32 arranged on the limiting plate 211. The cylinder 2 32 can drive the pressing plate 31 to be close to or away from the limiting plate 211. The clamping structure 3 also includes a positioning column 33 located between the limiting plate 211 and the pressing plate 31. The pressing plate 31 is arranged parallel to the limiting plate 211. One end of the positioning column 33 is fixedly connected to the pressing plate 31, and the positioning column 33 is arranged vertically to the pressing plate 31. The other end of the positioning column 33 can press the disc 13 onto the limiting plate 211.

[0049] like Figure 3 As shown, the driving member 22 is a motor, and the rotating shaft 213 is connected to the motor shaft of the motor.

[0050] like Figure 6 and Figure 7 As shown, there are two welding mechanisms, and the lawn mower production line for producing lawn mowers includes two welding robots 6 and a clamping robot 7. The clamping robot 7 is arranged between the two welding mechanisms, and the two welding robots 6 are respectively arranged on the side of the welding mechanism where the clamping robot 7 is not arranged; the clamping claw 71 of the clamping robot 7 is provided with a spring 72 that can drive the clamping claw 71 to move up and down.

[0051] The welding of the blade 14 adopts the method of spot welding first and then full welding. First, one of the blades 14 is clamped by the clamping robot 7 and placed on the outer wall of the sleeve 11 of one of the welding mechanisms. The spring 72 is used to compensate for the gap 5 between the blade 14 and the outer wall of the sleeve 11. The spring 72 can make the blade 14 always abut against the outer wall of the sleeve 11. Then, the blade 14 is spot welded by the welding robot 6 located on one side of the welding mechanism. After the spot welding is completed, the welding robot 6 on one side of the welding mechanism performs full welding on the blade 14; at the same time, the clamping robot 7 releases the blade 14, and clamps another blade 14 and places it on the outer wall of the sleeve 11 of another welding mechanism, and then the above-mentioned spot welding and full welding are completed in sequence.

[0052] By adopting spot welding and full welding, two welding robots 6 and welding mechanisms only need one clamping robot 7 to clamp them, which makes the utilization rate of the clamping robot 7 higher and further improves the production efficiency of the welding robot 6 and the clamping robot 7 on the lawn mower production line.

[0053] Embodiment 2

[0054] The content of this embodiment is basically the same as that of the first embodiment, except that:

[0055] like Figure 1-7 As shown, the clamping structure 3 includes a clamping member and a motor arranged on the limit plate 211 and controlling the opening and closing of the clamping member. The clamping member includes two clamping blocks. The limit plate 211 and the disc 13 are both arranged between the two clamping blocks. The motor can drive the clamping blocks to clamp the limit plate 211 and the disc 13.

[0056] By adopting the clamping member, the limiting plate 211 and the disc 13 can be clamped quickly, which further improves the stability of the connection between the limiting plate 211 and the disc 13.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lawn mower shaft assembly welding mechanism, the lawn mower shaft assembly comprising a sleeve (11) and two main shafts (12) respectively arranged at both ends of the sleeve (11), both ends of the sleeve (11) are provided with a disc (13), the main shaft (12) is fixed on the disc (13) The welding mechanism comprises two fixing seats (2), characterized in that: Each fixed seat (2) is provided with a rotating seat (21) capable of rotating relative to the fixed seat (2). The two rotating seats (21) are arranged opposite to each other. A driving member (22) for driving the rotating seat (21) to rotate is provided in one of the fixed seats (2). The rotating seat (21) comprises a limiting plate (211) capable of fitting with a circular disk (13) of the mower shaft assembly. The limiting plate (211) is provided with a notch (212) for allowing one end of the main shaft (12) of the mower shaft assembly to pass through. The limiting plate (211) is provided with a pressing structure (3) for pressing the circular disk (13) and fitting the circular disk (13) with the limiting plate (211). The mower shaft assembly welding mechanism also comprises a support located between the two rotating seats (21) and capable of rising and falling relative to the rotating seat (21). The support seat (4) can be used to place the sleeve (11), the vertical cross-section of the notch (212) is U-shaped, the support seat (4) comprises a base (41), a support frame (42) located above the base (41), and a cylinder (43) fixed on the base (41) and driving the support frame (42) to rise and fall, the rotating seat (21) comprises a rotating shaft (213) rotatably arranged on the fixed seat (2), a base plate (214) fixed on the rotating shaft (213) and arranged opposite to the limit plate (211), and a U-shaped block (215) located between the limit plate (211) and the base plate (214), the closed end of the U-shaped block (215) is connected to the base plate (214), and the open end of the U-shaped block (215) is connected to the limit plate (211).

2. A lawn mower shaft assembly welding mechanism according to claim 1, characterized in that: The support frame (42) further comprises a bottom plate (421) fixedly connected to the piston rod (431) of the first cylinder (43) and a support plate (422) arranged on the bottom plate (421), wherein the support plate (422) is provided with an expansion groove (423) opening upward.

3. A lawn mower shaft assembly welding mechanism according to claim 2, characterized in that: The support seat (4) further comprises a guide rod (44) having one end fixedly connected to the bottom plate (421); the other end of the guide rod (44) is passed through the base (41) and can slide vertically along the base (41).

4. A lawn mower shaft assembly welding mechanism according to claim 2, characterized in that: The flaring groove (423) has two inclined guide surfaces (424) and a horizontal bottom surface (425), and the two inclined guide surfaces (424) are respectively located on both sides of the bottom surface (425).

5. The lawn mower shaft assembly welding mechanism according to claim 1, characterized in that: The rotating seat (21) further comprises a plurality of cross bars (217) located between the limiting plate (211) and the base plate (214); one end of the cross bar (217) is fixedly connected to the limiting plate (211), and the other end of the cross bar (217) is fixedly connected to the base plate (214).

6. A lawn mower shaft assembly welding mechanism according to claim 1, characterized in that: The clamping structure (3) comprises a pressing plate (31) located on one side of the limiting plate (211) and a second cylinder (32) arranged on the limiting plate (211), wherein the second cylinder (32) can drive the pressing plate (31) to move closer to or farther from the limiting plate (211).

7. A lawn mower shaft assembly welding mechanism according to claim 6, characterized in that: The clamping structure (3) further comprises a positioning column (33) located between the limiting plate (211) and the pressing plate (31); the pressing plate (31) and the limiting plate (211) are arranged in parallel; one end of the positioning column (33) is fixedly connected to the pressing plate (31); the positioning column (33) and the pressing plate (31) are arranged perpendicularly; and the other end of the positioning column (33) can press the disc (13) onto the limiting plate (211).

8. The lawn mower shaft assembly welding mechanism according to claim 1, characterized in that: The driving member (22) is a motor, and the rotating shaft (213) is connected to the motor shaft of the motor.

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