Cutter shaft combined structure with anti-falling function

Abstract

The utility model discloses a cutter shaft combination structure with an anti-dropping function, which comprises a rotating roller, a cutter combination body and a retaining mechanism, the rotating roller is a straight roller body with a circular section, and the left end and the right end of the rotating roller are respectively provided with a rotating shaft. The cutter combination bodies comprise a plurality of cutter combination bodies which are arranged at equal intervals in the axial direction of the rotating roller, and each cutter combination body comprises two cutter combination bodies which are annularly and uniformly arranged on the periphery of the rotating roller. The cutter assembly comprises a pin shaft seat, a pin shaft with a head, a cutter head and a cutter handle, the pin shaft seat is fixed on the rotating roller, the cutter head is rotatably connected with the pin shaft seat through the cutter handle, a retaining mechanism is mounted on the right side of each pin shaft seat and comprises a mounting plate and a bolt assembly, and the bolt assembly is fixed on the right side of the pin shaft seat through the mounting plate; and the strip-head pin shaft is prevented from separating from the inner side of the pin shaft seat. The retaining mechanism can limit the pin shaft with the head, prevents the pin shaft with the head from falling off from the pin shaft seat, is firm in structure and not prone to falling off, and improves working safety.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a cutter shaft assembly structure with anti-detachment function. Background Technology

[0002] Lawn mowers have a wide range of important applications in agricultural production, landscaping, and forest protection. They are equipped with wheeled walking mechanisms, and most mowing mechanisms use a blade shaft structure (such as...). Figure 7 As shown, the mowing mechanism is installed inside the machine hood and attached to the front of the walking device. The power unit of the walking device drives the cutter shaft to rotate, which in turn drives the cutter handle and cutter head to rotate at high speed for weeding. Currently, the cutter handle is rotatably connected to the cutter shaft via bolts and bolt seats. During operation, because the cutter handle rotates frequently relative to the bolt seat, the nut at the bolt end can loosen. This can easily lead to bolts falling off, causing the cutter handle and cutter head to fly out and damage the machine hood or injure people. Frequent and regular inspections are required. If the cutter handle falls off during use, the machine needs to be stopped for maintenance, resulting in poor safety and reliability, affecting normal operation and work efficiency. Therefore, the existing technology urgently needs further improvement and enhancement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a blade shaft assembly structure with anti-detachment function, which solves the problems of the blade handle of the existing blade shaft type lawnmower being easy to detach, causing the blade handle and blade head to fly out and damage the machine cover or injure people, and the need to stop the machine for maintenance after the blade handle falls off during use, resulting in poor safety and reliability, affecting normal operation and work efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cutter shaft assembly structure with anti-detachment function includes a rotating roller, a cutter assembly and an anti-retraction mechanism. The rotating roller is a straight roller with a circular cross-section and is arranged horizontally. A rotating shaft is provided at each of the left and right ends of the rotating roller.

[0006] The tool assembly is provided in multiple sets, and the multiple sets of tool assemblies are arranged at equal intervals along the axial direction of the rotating roller. Each set of tool assemblies includes at least two tool assemblies that are evenly arranged in a ring around the periphery of the rotating roller.

[0007] The tool assembly includes a pin seat, a lead pin, a cutter head, and a cutter shank. The pin seat is fixedly mounted on the outer circumference of the rotating roller. One end of the cutter shank is rotatably connected to the pin seat via the lead pin. The cutter head is located at the other end of the cutter shank. Each lead pin is equipped with a cotter pin.

[0008] One side of each pin shaft seat is provided with one of the retreat-stop mechanisms, which comprises a mounting plate and a bolt assembly, the mounting plate is arranged on the outside of the pin shaft seat, and the bolt assembly is fixed on the mounting plate to block the band head pin shaft from escaping from the inside of the pin shaft seat.

[0009] Further, the straight roller body is of a hollow structure, and one end face of each of the left and right ends of the straight roller body is fixed with an end plate, and the two rotating shafts are coaxially arranged with the straight roller body, and the opposite ends of the two rotating shafts are fixedly connected with the adjacent end plates.

[0010] Further, the pin shaft seat comprises a left vertical plate and a right vertical plate, and the left vertical plate and the right vertical plate are arranged in parallel at a relative interval and are fixedly connected with the circumferential outer wall of the rotating roller in an integrated manner.

[0011] One end of the tool shank is located between the left vertical plate and the right vertical plate, the band head pin shaft passes through the right vertical plate, the tool shank and the left vertical plate in sequence in the transverse direction, the left end of the band head pin shaft is provided with a through hole, and the split pin is arranged in the through hole of the band head pin shaft and located on the left side of the left vertical plate.

[0012] Further, the tool bit is of a 1 / 4 circular arc structure, one side of the middle part of the tool bit is fixedly connected with the other end of the tool shank in an integrated manner, and the tool bit is curved to one side of the tool shank relative to the rotating direction of the rotating roller.

[0013] The cutting edge is located on the side of the tool bit away from the tool shank, and the thickness of the tool bit gradually decreases from the side connected with the tool shank to the side where the cutting edge is located.

[0014] Further, the band head pin shaft is provided with two flat washers, one of which is located between the split pin and the left vertical plate, and the other is located between the right vertical plate and the head of the band head pin shaft.

[0015] Further, the mounting plate is located on the right side of the right vertical plate, and the left end of the mounting plate is fixedly connected with the side opposite to the rotating direction of the right vertical plate in an integrated manner.

[0016] The bolt assembly comprises a hexagonal head bolt and a lock nut, the hexagonal head bolt is arranged in the circular hole of the mounting plate, the lock nut is located on the right side of the band head pin shaft and close to the head of the band head pin shaft, and the lock nut is screwed on the hexagonal head bolt.

[0017] By adopting the above technical scheme, the tool combination of the utility model has the retreat-stop mechanism, effectively limits the installed band head pin shaft, avoids the band head pin shaft from falling off the pin shaft seat, the retreat-stop mechanism is not affected by the rotation of the tool shank, the structure is firm and not easy to fall off, the working safety of the mower is improved, and the normal working state is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the tool shaft combination structure with the anti-falling function of the utility model.

[0019] Figure 2 is a right view of the knife shaft combination structure with anti-dropping function.

[0020] Figure 3 is a right front view structure schematic diagram of the cutter combination body.

[0021] Figure 4 is a left front view structure schematic diagram of the cutter combination body.

[0022] Figure 5 is Figure 3 is a schematic view of a part, showing a pin shaft seat, a head pin shaft and a retreat stop mechanism.

[0023] Figure 6 is a schematic view of the knife handle and the knife head combination structure.

[0024] Figure 7 is a schematic view of the existing knife shaft combination structure in the background art. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with the drawings:

[0026] In combination Figures 1 to 6 A knife shaft combination structure with anti-dropping function, comprising a rotating roller 1, a cutter combination body 2 and a retreat stop mechanism, the rotating roller 1 is a straight roller body with a circular cross section and is arranged horizontally transversely, the straight roller body is a hollow steel pipe, and the end faces of the left and right ends of the straight roller body are respectively fixed with an end plate 11, the end plate 11 is a circular steel plate, and the left and right ends of the straight roller body are respectively closed by the two end plates 11 and are fixedly welded with the straight roller body to form an integral structure.

[0027] The left and right ends of the rotating roller 1 are respectively provided with a rotating shaft 12, specifically, the two rotating shafts 12 are coaxially arranged with the straight roller body, and the opposite ends of the two rotating shafts 12 are respectively fixedly welded with the center positions of the adjacent end plates 11. The two rotating shafts 12 located at the left and right ends of the rotating roller 1 are respectively rotatably connected with the rack of the lawn mower, and the power device of the lawn mower is connected with one of the rotating shafts 12 through a transmission mechanism to drive the rotating roller 1 to rotate around the axis, and in the working state, the upper surface of the rotating roller 1 rotates to the front side, and the lower surface rotates to the rear side.

[0028] The cutter combination body 2 is provided with multiple groups, and the multiple groups of cutter combination bodies 2 are arranged on the circumferential surface of the rotating roller 1 at equal intervals along the axial direction of the rotating roller 1, each group of cutter combination bodies 2 comprises two cutter combination bodies 2 arranged uniformly in a ring shape on the periphery of the rotating roller 1, specifically, the two cutter combination bodies 2 in the same group are installed on the circumferential outer wall of the rotating roller 1 in a central symmetric manner with the axis of the rotating roller 1 as the center.

[0029] Specifically, the cutter assembly 2 comprises a pin shaft seat, a head pin shaft 23, a shank 24 and a head 25, the pin shaft seat is fixedly arranged on the circumferential outer wall of the rotating roller 1, and specifically, the pin shaft seat comprises a left vertical plate 21 and a right vertical plate 22, both of which are arranged in opposite directions and are perpendicular to the axis of the rotating roller 1, and one side of each of the left vertical plate 21 and the right vertical plate 22 is fixedly welded to the circumferential outer wall of the rotating roller 1 in an integrated manner. A pin hole is formed in each of the left vertical plate 21 and the right vertical plate 22, and the two pin holes are coaxially arranged and have the same inner diameter.

[0030] One end of the shank 24 is provided with a shaft hole 241, and the one end of the shank 24 is located between the left vertical plate 21 and the right vertical plate 22 and is rotationally connected to the pin shaft seat through the head pin shaft 23. During installation, the head pin shaft 23 is sequentially inserted from the right side through the right vertical plate 22, the shank 24 and the left vertical plate 21, the left end of the head pin shaft 23 is inserted out of the left side wall of the left vertical plate 21, the left end of the head pin shaft 23 is provided with a through hole, and each head pin shaft 23 is provided with an open pin 26 inserted in the through hole.

[0031] The open pin 26 is located on the left side of the left vertical plate 21 and is inserted into the through hole of the head pin shaft 23 to lock the head pin shaft 23, so as to prevent the head pin shaft 23 from being pulled out in the working state. Two flat washers 27 are arranged on the head pin shaft 23, one of which is located between the open pin 26 and the left vertical plate 21, and the other is located between the right vertical plate 22 and the head of the head pin shaft 23.

[0032] The head 25 is fixed to the end of the shank 24 away from the pin shaft seat, and specifically, the head 25 is in the shape of a quarter of a circle, one side of the middle of the head 25 is fixedly connected to the other end of the shank 24 in an integrated manner, and the head 25 is curved to the side of the rotating roller 1 in the direction of rotation of the rotating roller 1 relative to the shank 24.

[0033] Specifically, the cutting edge is located on the side of the head 25 away from the shank 24, and the thickness of the head 25 gradually decreases from the side connected to the shank 24 to the side where the cutting edge is located. In the working state, the rotating roller 1 drives all the cutter assemblies 2 to rotate rapidly, the shank 24 and the head 25 remain in an unfolded state under the action of centrifugal force and rotate rapidly around the rotating roller 1, and the high-speed moving head 25 cuts off the weeds.

[0034] Each pin shaft seat is provided with a retreat prevention mechanism on the right side, and the retreat prevention mechanism comprises a mounting plate 31 and a bolt assembly, the mounting plate 31 is arranged on the right side of the pin shaft seat, the bolt assembly is fixed to the mounting plate 31, and the bolt assembly blocks the head pin shaft 23 from being pulled out from the inside of the pin shaft seat.

[0035] Specifically, the mounting plate 31 is located on the right side of the right vertical plate 22, and the left end of the mounting plate 31 is fixed integrally on the side opposite to the rotating direction of the right vertical plate 22. The bolt assembly includes a hexagonal head bolt 32 and a lock nut 33, the hexagonal head bolt 32 is arranged in the circular hole of the mounting plate 31, and the lock nut 33 is located on the right side of the head pin shaft 23 and close to the head of the head pin shaft 23, and the lock nut 33 is screwed on the hexagonal head bolt 32.

[0036] The hexagonal head bolt 32 is fixed on the mounting plate 31 by the lock nut 33, and in the working state, the tool handle 24 will rotate relative to the head pin shaft 23, and the head pin shaft 23 will also rotate relative to the pin shaft seat, and the split pin 26 has a function of preventing the head pin shaft 23 from being separated from the pin shaft seat to a certain extent. If the split pin 26 is broken and fails, the lock nut 33 can limit the head pin shaft 23 and effectively prevent the head pin shaft 23 from falling off the pin shaft seat, and the tool handle 24 will not be separated from the head pin shaft 23 and fly out, thereby improving the working safety of the mower and ensuring the normal working state.

[0037] The parts not described in the utility model can be realized by adopting or referring to the existing technology.

[0038] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the utility model, it should be understood that the terms "up", "down", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0040] Of course, the above description is not a limitation on the utility model, and the utility model is also not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A cutter shaft assembly structure with anti-detachment function, characterized in that, The utility model relates to a rotary roller, cutter assembly and retreat prevention mechanism, the rotary roller is straight roller body of circular section and transverse horizontal arrangement, and the left and right ends of rotary roller are equipped with a rotating shaft respectively; The cutter assembly is provided with multiple groups, and the multiple groups of cutter assemblies are arranged at equal intervals along the axial direction of the rotary roller, and each group of cutter assemblies comprises at least two cutter assemblies arranged uniformly in a ring shape on the periphery of the rotary roller; The cutter assembly comprises a pin shaft seat, a head pin shaft, a cutter head and a cutter handle, the pin shaft seat is fixedly arranged on the outer wall of the rotary roller, one end of the cutter handle is rotatably connected to the pin shaft seat through the head pin shaft, and the cutter head is arranged at the other end of the cutter handle, and each head pin shaft is provided with an open pin; One side of each pin shaft seat is provided with a retreat prevention mechanism, and the retreat prevention mechanism comprises a mounting plate and a bolt assembly, the mounting plate is arranged on the outer side of the pin shaft seat, and the bolt assembly is fixed to the mounting plate.

2. The knife shaft assembly with anti-disengagement function according to claim 1, characterized in that, The straight roller body is a hollow structure, and the end faces of the left and right ends of the straight roller body are fixedly provided with an end plate respectively, the two rotating shafts are coaxially arranged with the straight roller body, and the opposite ends of the two rotating shafts are fixedly connected to the adjacent end plates respectively.

3. The knife shaft assembly with anti-disengagement function according to claim 1, characterized in that, The pin shaft seat comprises a left vertical plate and a right vertical plate, the left vertical plate and the right vertical plate are arranged in parallel at a relative interval, and are fixedly connected to the outer wall of the rotary roller in an integrated manner; One end of the cutter handle is located between the left vertical plate and the right vertical plate, the head pin shaft passes through the right vertical plate, the cutter handle and the left vertical plate in sequence in the transverse direction, a through hole is formed in the left end of the head pin shaft, and the open pin is arranged in the through hole of the head pin shaft and located on the left side of the left vertical plate.

4. The knife shaft assembly with anti-disengagement function according to claim 3, characterized in that, The cutter head is a 1 / 4 circular arc structure, one side of the cutter head is fixedly connected to the other end of the cutter handle in an integrated manner, and the cutter head is curved to the side of the rotary roller in the direction of rotation of the cutter handle; The cutting edge is located on the side of the cutter head away from the cutter handle, and the thickness of the cutter head gradually decreases from the side connected to the cutter handle to the side where the cutting edge is located.

5. The knife shaft assembly with anti-disengagement function according to claim 3, characterized in that, The head pin shaft sleeve is provided with two flat washers, one of which is located between the open pin and the left vertical plate, and the other is located between the right vertical plate and the head of the head pin shaft.

6. The knife shaft assembly with anti-disengagement function according to claim 3, wherein, The mounting plate is located on the right side of the right vertical plate, and the left end of the mounting plate is fixedly connected to the side opposite to the direction of rotation of the right vertical plate in an integrated manner; The bolt assembly comprises a hexagonal head bolt and a lock nut, the hexagonal head bolt is arranged in the circular hole of the mounting plate, the lock nut is located on the right side of the head pin shaft and close to the head of the head pin shaft, and the lock nut is screwed on the hexagonal head bolt.

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