Anti-reverse driving shaft and buckling mixing plough

Abstract

The utility model discloses an anti-reverse driving shaft and a buckling and mixing plough. The front end of a driving shaft is connected with a gearbox connecting part through a front-end universal joint; a driving ratchet wheel is fixed at the rear end of the driving shaft; a spline shaft is arranged on the rear side of the driving shaft, driving teeth are arranged on the outer diameter of the spline shaft, a sliding ratchet wheel is axially fixed to the spline shaft in a sliding mode and matched with the driving ratchet wheel, and a ratchet wheel meshing tooth combination is arranged between the sliding ratchet wheel and the driving ratchet wheel. The arc-shaped meshing tooth combination can be meshed when the ratchet wheel is driven to rotate in the forward direction and separated when the ratchet wheel is driven to rotate in the reverse direction. And a spring is arranged between the rear end universal joint and the sliding ratchet wheel. When the machine works, the sliding ratchet wheel installed on the spline shaft slides forwards on the spline shaft through the thrust of the spring and is meshed with the driving ratchet wheel on the driving shaft, and synchronous double driving of the front wheel and the rear wheel is achieved; when the machine is in a reverse gear, the driving shaft rotates reversely, the driving ratchet is separated from the sliding ratchet, the rear wheel loses power, and the front wheel is in single drive.

Description

Technical Field

[0001] The utility model belongs to the technical field of harrows, and particularly relates to an anti-reverse drive shaft and a harrow. Background Art

[0002] As is well known, in the existing structural design of harrows, the engine is directly connected to the front wheels, and the engine drives the front wheels to rotate, thereby driving the entire harrow to move forward. After evolving through various structural forms, in order to improve the ground-gripping ability during walking in farmland, those skilled in the art have improved and adopted a universal shaft to transmit power from the engine to the rear wheels. This driving method can significantly improve the ground-gripping ability of the rear wheels and effectively improve stability when walking on muddy ground.

[0003] However, after the power of this improved version of the harrow is transmitted to the rear wheels, new technical problems have arisen. When the drive shaft is running, due to the linkage between the front and rear wheels, when the front wheels rotate, the rear wheels rotate synchronously; but in the case of reversing, if the front wheels rotate backward, the drive shaft drives the rear wheels to rotate synchronously. This situation is very likely to cause injury and pose a safety hazard to the operator.

[0004] In view of this drawback, the technical problem that urgently needs to be solved at present is to design an anti-reverse drive shaft and a harrow. By designing a transmission structure, the power transmission can be realized in a way that the forward rotation drives and the reverse rotation stops driving, so as to avoid the occurrence of operation accidents during the driving process. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the utility model provides an anti-reverse drive shaft and a harrow. By designing a drive shaft with a forward meshing structure on the drive shaft, it can drive the rear wheels to move during forward rotation and disconnect the driving force during reverse rotation, thus avoiding injury to the operator behind the rear wheels during backward movement.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] An anti-reverse drive shaft includes a driving shaft. The front end of the driving shaft is fixed to a transmission connection part through a front universal joint; a driving ratchet is fixed to the rear end of the driving shaft; a spline shaft is arranged at the rear side of the driving shaft, and a sliding ratchet is axially slidably fixed on the spline shaft. The sliding ratchet cooperates with the driving ratchet, and a ratchet meshing tooth combination is arranged between them; the ratchet meshing tooth combination can be meshed when the driving ratchet rotates forward and separated when the driving ratchet rotates backward; a driving tooth matching hole is arranged at the center of the sliding ratchet and is matched with the spline shaft.

[0008] A rear universal joint is provided at the rear end of the spline shaft. A spring is provided between the rear universal joint and the sliding ratchet, and the spring is arranged around the spline shaft; a rear wheel drive rod is connected to the rear side of the rear universal joint.

[0009] The ratchet engaging tooth combination includes two complementary designed driving ends and driven ends. A number of inclined teeth and a number of inclined grooves are evenly arranged on the driving end and the driven end respectively, and the inclined teeth and the inclined grooves are complementary.

[0010] A through hole is provided at the axis of the driving ratchet, and the inner diameter of the through hole is larger than the maximum outer diameter of the spline shaft. The spline shaft can rotate without interference in the through hole.

[0011] A buckle plow includes a front frame. An engine, a gearbox and an operation handle are arranged on the top of the front frame. A front side chain is arranged on the gearbox and directly connected to the front wheel to achieve driving; the gearbox is connected to a rear end drive bin on the rear frame through an anti-reverse drive shaft. A rear side chain is arranged on the rear end drive bin and directly connected to the rear wheel to achieve driving; the rear end of the front frame is hinged to the rear frame through a hinge frame; a plow blade fixing rod and a plow blade are fixed on the rear frame.

[0012] A plow blade fixing rod is hinged on the rear frame. A plow blade is fixed at the bottom of the plow blade fixing rod. A driving lead screw is hinged at the top of the plow blade fixing rod. The driving lead screw passes through a lead screw nut, and the lead screw nut is fixed on the rear frame. A driving handle is fixed on the driving lead screw.

[0013] The utility model has the following beneficial effects: The utility model discloses an anti-reverse drive shaft and a buckle plow. The front end of the driving shaft is connected to the gearbox connection part through a front universal joint; a driving ratchet is fixed on the rear end of the driving shaft; a spline shaft is arranged at the rear side of the driving shaft. Driving teeth are arranged on the outer diameter of the spline shaft. A sliding ratchet is axially slidably fixed on the spline shaft. The sliding ratchet cooperates with the driving ratchet and a ratchet engaging tooth combination is arranged between the two; such a ratchet engaging tooth combination can be engaged when the driving ratchet rotates forward and separated when the driving ratchet rotates backward; a rear universal joint is provided at the rear end of the spline shaft and a spring is provided between the rear universal joint and the sliding ratchet. When the machine works, the sliding ratchet installed on the spline shaft slides forward on the spline shaft under the spring thrust and engages with the driving ratchet on the driving shaft to realize synchronous double drive of the front and rear wheels;

[0014] When the machine is in reverse gear, the driving shaft rotates reversely, the driving ratchet is separated from the sliding ratchet, the rear wheel loses power, and the front wheel is single-driven. The advantage of this design is that when the machine runs in reverse gear, the rear wheel has no power and only the front wheel has power, avoiding mechanical injury to the operator. Description of the Drawings

[0015] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 Schematic front view structure diagram of the anti-reverse drive shaft;

[0017] Figure 2 Schematic structure diagram of the spline shaft;

[0018] Figure 3 is Figure 2 Schematic cross-sectional structure diagram of area A in

[0019] Figure 4 is Figure 2 Schematic cross-sectional structure diagram of area B in

[0020] Figure 5 Schematic radial cross-sectional structure diagram of the sliding ratchet;

[0021] Figure 6 Schematic axial cross-sectional structure diagram of the sliding ratchet;

[0022] Figure 7 Schematic radial cross-sectional structure diagram of the driving ratchet;

[0023] Figure 8 Schematic axial cross-sectional structure diagram of the driving ratchet;

[0024] Figure 9 Schematic structure diagram of the ratchet meshing tooth combination;

[0025] Figure 10 Schematic structure diagram of the buckle plow thorn;

[0026] In the figure:

[0027] 1. Driving shaft, 11. Front universal joint, 12. Transmission connection part;

[0028] 2. Driving ratchet, 21. Through hole, 22. Driving ratchet teeth;

[0029] 3. Spline shaft, 30. Spline teeth, 31. Rear universal joint, 32. Rear wheel drive rod, 321. Spline hole;

[0030] 4. Spring;

[0031] 5. Sliding ratchet, 51. Ratchet spline hole, 521. Inclined groove, 522. Inclined teeth, 52. Driven ratchet teeth;

[0032] 6. Front frame, 61. Engine, 62. Transmission, 63. Operating handle, 64. Front wheel, 65. Rear drive compartment, 66. Lead screw nut, 67. Lead screw, 68. Drive handle; 7. Rear frame, 70. Rear wheel, 71. Hinge frame, 72. Plow blade fixing rod, 73. Plow blade, 74. Front end chain, 75. Rear end chain. Detailed implementation mode

[0033] The present utility model will be further described through implementation modes. The following description is only for exemplary explanation. Those skilled in the art can make further structural improvements based on the following explanation. The protection scope of this patent shall be subject to the scope recorded in the claims.

[0034] Embodiment 1:

[0035] An anti-reverse drive shaft, as Figures 1-9 shown, which includes a driving shaft 1. The driving shaft can be a hollow shaft or a shaft body with a counterbore at the left end. The front end of the driving shaft 1 is fixed to a transmission connection part 12 through a front universal joint 11, and the transmission connection part 12 is connected to the transmission 62 to achieve driving; a driving ratchet 2 is fixed to the rear end of the driving shaft 1; a spline shaft 3 is arranged at the rear side of the driving shaft 1, and a sliding ratchet 5 is axially slidably fixed on the spline shaft 3. The sliding ratchet 5 cooperates with the driving ratchet 2 and a ratchet meshing tooth combination is arranged between the two.

[0036] As Figure 5 , 6 , 7, 8, 9 shown, the sliding ratchet 5 includes a ratchet spline hole 51 and a driven ratchet tooth 52 at the end. A through hole 21 is arranged at the axis center of the driving ratchet 2. The inner diameter of the through hole 21 is larger than the maximum outer diameter of the spline shaft 3 and the spline shaft 3 can rotate in the through hole without interference. A driving ratchet tooth 22 is also arranged at the end of the driving ratchet 2 to cooperate with the driven ratchet tooth 52. The specific cooperation structure between the two is as shown in the developed Figure 9 shown. The ratchet meshing tooth combination includes two complementary-designed driving ends and driven ends. In this embodiment, the driving ratchet tooth 22 is the driving end and the driven ratchet tooth 52 is the driven end. A plurality of inclined teeth 522 and a plurality of inclined grooves 521 are uniformly arranged on the driving ratchet tooth 22 and the driven ratchet tooth 52 respectively. The inclined teeth 522 and the inclined grooves 521 are complementary, and the complementary state is as Figure 9 shown.

[0037] A rear universal joint 31 is arranged at the rear end of the spline shaft 3 of the present utility model. A spring 4 is arranged between the rear universal joint 31 and the sliding ratchet. The spring 4 is arranged around the spline shaft 3 and abuts against the end of the sliding ratchet 5; a rear wheel drive rod 32 is connected to the rear side of the rear universal joint 31.

[0038] With the above complementary structure, when the driving shaft 1 rotates forward, it drives the driving ratchet 2 to rotate forward. At the same time, through the meshing of the driving ratchet teeth 22 and the driven ratchet teeth 52 with complementary design, the sliding ratchet 5 is driven to rotate synchronously with the spline shaft 3. While rotating, the rear wheel driving rod 32 is driven to rotate through the rear universal joint 31 at the rear end. Since the rear wheel driving rod 32 is usually fixed on the rear wheel driving device, the rear wheel 70 will also rotate forward following the driving ratchet 2.

[0039] When the driving ratchet 2 rotates reversely, the driving ratchet teeth 22 are disengaged from the driven ratchet teeth 52 in the reverse direction. The driving ratchet 2 pushes the sliding ratchet 5 to axially move towards the spline shaft 3 and the two are separated. At this time, the spline shaft 3 cannot rotate and the rear wheel 70 does not rotate.

[0040] After the above structure is set, when turning or reversing in the driving state of the present utility model, the rear wheel can be controlled not to rotate synchronously with the front wheel, which can ensure the operation safety of the operator and prevent injuries to personnel or crops caused by the backward rotation of the rear wheel.

[0041] Embodiment 2:

[0042] A buckling plow, as Figure 10 shown, which adopts the anti-reverse driving shaft disclosed in Embodiment 1. This buckling plow includes a front frame 6. An engine 61, a gearbox 62 and an operating handle 63 are arranged on the top of the front frame 6. A front-end chain is connected to the gearbox 62 and directly connected to the front wheel 64 to achieve driving; the gearbox 62 is connected to the rear-end drive bin 65 on the rear frame through an anti-reverse driving shaft. A rear-end chain is arranged on the rear-end drive bin 65 and directly connected to the rear wheel 70 to achieve driving; the rear end of the front frame 6 is hinged to the rear frame 7 through a hinge frame 71; a plow blade fixing rod 72 and a plow blade 73 are fixed on the rear frame 7.

[0043] Through the above structure setting, the present utility model applies the anti-reverse driving shaft to the buckling plow, which can realize that when the buckling plow moves forward, the rear wheel 70 rotates synchronously to increase the rear-side gripping ability and improve the walking stability on muddy ground; when the front wheel rotates reversely, the driving force of the rear wheel 70 can be disconnected through the anti-reverse driving shaft to prevent injuries to personnel or crops caused by the rear wheel rotating backward synchronously.

[0044] On the basis of the above embodiments, further, a plow blade fixing rod 72 is hinged on the rear frame 7. The top of the plow blade fixing rod 72 is hingedly provided with a driving lead screw 67. The driving lead screw 67 passes through a lead screw nut 66. The lead screw nut 66 is fixed on the rear frame 7, and a driving handle 68 is fixed on the driving lead screw 67.

[0045] The user can drive the front and rear extension amount of the driving lead screw 67 by adjusting the driving handle 68. Since the front end of the driving lead screw 67 is hinged to the top of the plow blade fixing rod 72, the plowing angle of the plow blade 73 can be adjusted by pulling back and forth.

[0046] In summary, the utility model can realize the connection drive between the gearbox 62 and the rear wheel 70 through the anti-reverse drive shaft. When the engine 61 controls the gearbox 62 to reverse, the driving ratchet 2 is disengaged from the sliding ratchet 5, and the rear wheel 70 loses power, only realizing the single drive of the front wheel. The utility model can avoid mechanical injuries to the operator and overcomes various drawbacks in the prior art.

Claims

1. An anti-reverse drive shaft, characterized in that: It includes a driving shaft, the front end of the driving shaft is fixed to the transmission connection part through a front universal joint; a driving ratchet is fixed on the rear end of the driving shaft; a spline shaft is arranged at the rear side of the driving shaft, and a sliding ratchet is axially slidably fixed on the spline shaft. The sliding ratchet cooperates with the driving ratchet and a ratchet meshing tooth combination is arranged between them; the ratchet meshing tooth combination can be meshed when the driving ratchet rotates forward and separated when the driving ratchet rotates backward; a driving tooth mating hole is arranged at the center of the sliding ratchet and is matched with the spline shaft. A rear universal joint is arranged at the rear end of the spline shaft, a spring is arranged between the rear universal joint and the sliding ratchet, and the spring is arranged around the spline shaft; the rear side of the rear universal joint is connected with a rear wheel drive rod.

2. The anti-reverse drive shaft according to claim 1, characterized in that: The ratchet meshing tooth combination includes two complementary-designed driving ends and driven ends. A number of inclined teeth and a number of inclined grooves are evenly arranged on the driving end and the driven end respectively, and the inclined teeth and the inclined grooves are complementary.

3. The anti-reverse drive shaft according to claim 1, wherein: A through hole is arranged at the center of the driving ratchet, and the inner diameter of the through hole is larger than the maximum outer diameter of the spline shaft.

4. A button-plowing plow, characterized in that: An anti-reverse driving shaft as described in any one of claims 1-3 is installed on the plough.

5. A plough as claimed in claim 4, wherein: It includes a front frame, an engine, a transmission and an operating handle are arranged on the top of the front frame. A front side chain is arranged on the transmission and is directly connected to the front wheel to achieve driving; the transmission is connected to a rear end driving bin on the rear frame through an anti-reverse driving shaft. A rear side chain is arranged on the rear end driving bin and is directly connected to the rear wheel to achieve driving; the rear end of the front frame is hinged to the rear frame through a hinge frame; a plough blade fixing rod and a plough blade are fixed on the rear frame.

6. A plough as claimed in claim 5, wherein: A plough blade fixing rod is hinged on the rear frame, a plough blade is fixed at the bottom of the plough blade fixing rod, a driving lead screw is hinged at the top of the plough blade fixing rod. The driving lead screw passes through a lead screw nut, and the lead screw nut is fixed on the rear frame. A driving handle is fixed on the driving lead screw.

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