Reverse gear control structure of mini-tiller

Abstract

The utility model provides a reverse gear control structure of a mini-tiller, which comprises a reverse rotation belt pulley, a driving belt, a reverse gear box, a forward rotation belt pulley, a worm connecting shaft, a driving belt pulley and a tensioning plate assembly, the driving belt wheel is connected with a reverse rotation belt wheel and a forward rotation belt wheel through driving belts, the reverse rotation belt wheel is connected with a second gear in a reverse gear box, a first gear in the reverse gear box is fixedly connected with the top end of a worm connecting shaft, and the bottom end of the worm connecting shaft is connected with a worm through an elastic cylindrical pin. The worm is arranged on the lower side of the armrest frame, and the worm connecting shaft is rotationally connected to the armrest frame. When the mini-type rotary cultivator falls into the ground, the mini-type rotary cultivator can easily get out of trouble through the reverse gear function, when the mini-type rotary cultivator works to the ridge boundary, the mini-type rotary cultivator can rapidly turn round through the reverse gear function, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of plant protection machinery, in particular to a reverse gear control structure of a micro-tillage machine. Background Art

[0002] The micro-tillage machine is powered by a small diesel engine or gasoline engine, and has the characteristics of light weight, small size, simple structure, etc. The micro-tillage machine is widely used in dry land, paddy fields, orchards, etc. in plains, mountainous areas, and hills. It can be equipped with corresponding equipment for pumping, power generation, spraying, and spraying. It can also be towed by a trailer for short-distance transportation. The micro-tillage machine can be used freely in the field, which is convenient for users to use and store, eliminating the trouble that large agricultural machinery cannot enter the mountain fields. It is the best choice for farmers and consumers to replace cattle plowing.

[0003] For micro rotary tillers with vertical shaft engines and tillage range of 40cm-80cm, due to the light weight of the whole machine, they usually do not have the function of rotary blade reversal. Figure 7 shown.

[0004] When the machine is stuck in the ground, it cannot get out easily; when the micro rotary tiller reaches the edge of the field, it cannot turn around quickly because it has no reverse gear function, which greatly affects the efficiency of the lower work. Utility Model Content

[0005] The utility model aims to provide a reverse gear control structure of a micro-tillage machine to overcome the above problems or at least partially solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is specifically implemented as follows:

[0007] The utility model provides a reverse gear control structure of a micro-tiller, comprising an armrest frame, a reverse pulley, a driving belt, a reverse gear box, a forward pulley, a worm connecting shaft and a driving pulley, wherein the driving pulley is connected to the output end of a vertical axis engine, the driving pulley is rotatably connected to the armrest frame through a bearing, and the driving pulley is respectively connected to the reverse pulley and the forward pulley through a driving belt, the reverse pulley is connected to a gear 2 in the reverse gear box, the gear 1 in the reverse gear box is fixedly connected to the top end of the worm connecting shaft, the bottom end of the worm connecting shaft is connected to the worm through an elastic cylindrical pin, the worm is arranged on the lower side of the armrest frame, and a rotary cutter is driven by a worm and worm gear box, the worm connecting shaft is rotatably connected to the armrest frame, the reverse gear box is fixedly connected to the armrest frame, and the forward pulley is sleeved and fixed on the worm connecting shaft.

[0008] It also includes a tensioning plate assembly, which is rotatably connected to the handrail frame through a rotating shaft and is tightly arranged on one side of the driving belt through the roller thereon. One end of the tensioning plate assembly is also fixedly connected to a control pull wire, which is connected to the handrail frame, and a tensioning reset spring is sleeved on the control pull wire, and the tensioning reset spring is close to one end of the tensioning plate assembly.

[0009] As a further solution of the utility model, the tensioning plate assembly, the tensioning reset spring and the control cable are provided in two groups, and the two groups of tensioning plate assemblies, the tensioning reset spring and the control cable correspond to the two groups of driving belts one by one.

[0010] As a further solution of the utility model, the reverse gear box includes gear one, gear two and a housing, gear one is meshed with gear two through gear teeth, and both are arranged inside the housing, the gear is fixed on the sleeve by a sleeve, and the two ends of the sleeve are rotatably connected to the housing through fully sealed bearings, the sleeve is sleeved and fixed on the worm connecting shaft, gear two is sleeved and fixed on the shaft, and the upper end of the shaft is connected to the reverse pulley.

[0011] As a further solution of the utility model, an oil nozzle is arranged on the shell.

[0012] As a further solution of the utility model, the shell is provided with an upper and lower part, and the shells are fixedly connected by bolts 2 and nuts.

[0013] As a further solution of the utility model, the outer circumference of the housing is integrally connected with three sets of mounting seats, and a shock-absorbing rubber ring and a bushing are clamped on the mounting seats, the bushing is arranged inside the shock-absorbing rubber ring, and a large gasket and an assembly bushing are respectively arranged on the outer side of the shock-absorbing rubber ring, and the large gasket and the assembly bushing are both sleeved on bolt 1, and bolt 1 is fixedly connected to the handrail frame.

[0014] As a further solution of the utility model, the driving pulley is integrally connected with a belt groove 1 and a belt groove 2, and two sets of driving belts are arranged on the belt groove 1 and the belt groove 2, and respectively drive the reverse pulley and the forward pulley.

[0015] The utility model provides a reverse gear control structure of a micro-tillage machine, which has the following beneficial effects:

[0016] When the machine is stuck in the ground, the reverse gear function can easily get the machine out of trouble. When the micro rotary tiller reaches the edge of the field, the reverse gear function can quickly turn around, greatly improving the working efficiency.

[0017] The axes of the two gears of the reverse gearbox are designed to be on the same arc, so that the same tensioning plate assembly and respective tensioning return springs and control cables can be used for forward and reverse rotation, with a high parts commonality rate and reduced production costs;

[0018] After the reverse gearbox is assembled with the vertical shaft engine and the handrail, a soft fixation is formed through the shock-absorbing rubber ring and bushing, which can reduce vibration and balance the manufacturing error and assembly error of each part, thereby reducing the precision requirement of each part manufacturing;

[0019] The reverse gearbox is installed at the load end of the transmission system. When rotating forward, the reverse gearbox is in a no-load state, which can effectively increase the service life of the reverse gearbox.

[0020] The reverse gearbox is used to realize the reverse function, and the speed of the machine rotary cutter reverse rotation can be changed by changing the gear ratio of gear one and gear two. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 For this utility model Figure 1 Schematic diagram of the cross section at AA in the middle.

[0024] Figure 3 For this utility model Figure 1 Schematic diagram of the cross section at BB in the middle.

[0025] Figure 4 It is a cross-sectional view of the reverse gear box in the present utility model.

[0026] Figure 5 It is a top view of the reverse gear box in the present utility model.

[0027] Figure 6 It is a partial cross-sectional view of the driving pulley in the utility model.

[0028] Figure 7 It is a structural schematic diagram of an existing micro rotary tiller.

[0029] In the figure: 1. vertical axis engine; 2. reverse pulley; 3. drive belt; 4. reverse gear box; 5. forward pulley; 6. worm connecting shaft; 7. elastic cylindrical pin; 8. worm; 9. driving pulley; 10. assembly bushing; 11. bolt one; 12. large gasket; 13. shock-absorbing rubber ring; 14. bushing; 15. tensioning plate assembly; 16. tensioning return spring; 17. control cable; 18. gear one; 19. housing; 20. fully sealed bearing; 21. bushing; 22. flat key; 23. shaft; 24. gear two; 25. bolt two; 26. nut; 27. oil nozzle; 91. belt groove one; 92. belt groove two. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] See also Figure 1-6 The reverse gear control structure of a micro-tiller provided by the embodiment of the utility model comprises an armrest frame, a reverse pulley 2, a driving belt 3, a reverse gear box 4, a forward pulley 5, a worm connecting shaft 6 and a driving pulley 9, wherein the driving pulley 9 is connected to the output end of the vertical axis engine 1, the driving pulley 9 is rotatably connected to the armrest frame through a bearing, and the driving pulley 9 is respectively connected to the reverse pulley 2 and the forward pulley 5 through the driving belt 3, the reverse pulley 2 is connected to the gear 24 in the reverse gear box 4, the gear 18 in the reverse gear box 4 is fixedly connected to the top end of the worm connecting shaft 6, the bottom end of the worm connecting shaft 6 is connected to the worm 8 through an elastic cylindrical pin 7, the worm 8 is arranged on the lower side of the armrest frame, and the rotary cutter is driven by the worm and worm gear box, the worm connecting shaft 6 is rotatably connected to the armrest frame, the reverse gear box 4 is fixedly connected to the armrest frame, and the forward pulley 5 is sleeved and fixed on the worm connecting shaft 6.

[0032] It also includes a tensioning plate assembly 15, which is rotatably connected to the handrail frame through a rotating shaft and is tightly arranged on one side of the driving belt 3 through the roller thereon. One end of the tensioning plate assembly 15 is also fixedly connected to a control pull wire 17, which is connected to the handrail frame, and a tensioning reset spring 16 is sleeved on the control pull wire 17, and the tensioning reset spring 16 is close to one end of the tensioning plate assembly 15.

[0033] like Figure 1As shown, two groups of tensioning plate assemblies 15, tensioning reset springs 16 and control cables 17 are provided, and the two groups of tensioning plate assemblies 15, tensioning reset springs 16 and control cables 17 correspond to the two groups of driving belts 3 respectively. By pulling the control pull rod, the main board of the tensioning plate assembly 15 can be driven to rotate around the central axis of the rotating shaft, thereby driving the roller on the main board to move, thereby tensioning or loosening the driving belt 3. At the same time, when the control cable 17 is pulled, the tensioning reset spring 16 will be compressed, and under the action of the rebound force of the tensioning reset spring 16, the tensioning plate assembly 15 will be automatically reset.

[0034] During use of the utility model, the handrail, the vertical axis engine 1, the worm gear box and the rotary cutter are first installed on the handrail frame, and the output end of the worm gear box is fixed to the rotary cutter, while the input end is connected to the worm 8, and the output end of the vertical axis engine 1 is connected to the driving pulley 9, and the driving pulley 9 is driven.

[0035] When working in the forward direction, the vertical axis engine 1 drives the driving pulley 9 to rotate, and at this time, the tensioning plate assembly 15 of the driving belt 3 between the corresponding driving pulley 9 and the forward pulley 5 is controlled to rotate, so as to tension the driving belt 3, and at the same time, the tensioning plate assembly 15 at the other end is loosened, so as to separate the tensioning plate assembly 15 from the other set of driving belts 3, so that the reverse pulley 2 is in an idling state, and then the forward pulley 5 rotates to drive the worm connecting shaft 6 and the worm 8 to rotate in turn, and then the rotary cutter is driven to rotate forward through the worm and worm gear box, so as to realize the tillage operation;

[0036] After the cutter sinks into the ground, the tensioning plate assembly 15 of the drive belt 3 between the corresponding active pulley 9 and the forward pulley 5 is rotated in the opposite direction to loosen it, and the other set of tensioning plate assemblies 15 is tensioned, thereby tensioning the drive belt 3 between the active pulley 9 and the reverse pulley 2, and then the active pulley 9 rotates to drive the reverse pulley 2 to rotate, and then drives gear 2 24 to rotate forward, and drives gear 1 18 to reverse under the action of the gear teeth, and then drives the worm connecting shaft 6 and the worm 8 to rotate through gear 18, and then drives the cutter to reverse through the worm and worm gear box, so that the cutter can be withdrawn from the ground, which can make the machine easily escape or turn around.

[0037] The axes of the two gears of the reverse gear box 4 are designed to be on the same arc, so that the same tensioning plate assembly 15 and respective tensioning return springs 16 and control cables 17 can be used during forward and reverse rotation.

[0038] like Figure 3-5As shown, the reverse gearbox 4 includes a gear 18, a gear 24 and a housing 19. The gear 18 is meshed with the gear 24 through gear teeth and both are arranged inside the housing 19. The gear 18 is sleeved and fixed on the shaft sleeve 21, and both ends of the shaft sleeve 21 are rotatably connected to the housing 19 through fully sealed bearings 20. The shaft sleeve 21 is sleeved and fixed on the worm connecting shaft 6, and the gear 24 is sleeved and fixed on the shaft 23, and the upper end of the shaft 23 is connected to the reverse pulley 2. The housing 19 is provided with an oil nozzle 27. The shell 19 is provided with an upper and lower part, and the shells 19 are fixedly connected by bolts 25 and nuts 26. The outer circumference of the shell 19 is integrally connected with three sets of mounting seats, and a shock-absorbing rubber ring 13 and a bushing 14 are clamped on the mounting seats. The bushing 14 is arranged inside the shock-absorbing rubber ring 13, and a large gasket 12 and an assembly bushing 1410 are respectively arranged on the outside of the shock-absorbing rubber ring 13, and the large gasket 12 and the assembly bushing 1410 are both sleeved on the bolt 11, and the bolt 11 is fixedly connected to the handrail frame.

[0039] After the reverse gear box 4 is assembled with the handrail frame and the vertical axis engine 1, a soft fixation is formed through the shock-absorbing rubber ring 13 and the bushing 14, which can reduce vibration and serve as a balance release point for the manufacturing errors and assembly errors of various parts, thereby reducing the precision requirements for the manufacturing of various parts.

[0040] like Figure 6 As shown, a belt groove 1 91 and a belt groove 2 92 are integrally connected to the driving pulley 9, and two sets of driving belts 3 are provided on the belt groove 1 91 and the belt groove 2 92, and respectively drive the reverse pulley 2 and the forward pulley 5, so that the rotary cutter is driven to rotate forward or flip through the forward rotation of a driving pulley 9.

[0041] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A reverse gear control structure of a micro-tillage machine, comprising an armrest, characterized in that: The invention also comprises a reverse pulley (2), a driving belt (3), a reverse gear box (4), a forward pulley (5), a worm connecting shaft (6) and a driving pulley (9), wherein the driving pulley (9) is connected to the output end of the vertical shaft engine (1), the driving pulley (9) is rotatably connected to the handrail frame through a bearing, and the driving pulley (9) is respectively connected to the reverse pulley (2) and the forward pulley (5) through a driving belt (3), and the reverse pulley (2) is connected to the gear 2 (1) in the reverse gear box (4). 24), the gear 1 (18) in the reverse gear box (4) is fixedly connected to the top end of the worm connecting shaft (6), the bottom end of the worm connecting shaft (6) is connected to the worm (8) through an elastic cylindrical pin (7), the worm (8) is arranged on the lower side of the handrail frame, and the rotary cutter is driven by the worm gear box, the worm connecting shaft (6) is rotatably connected to the handrail frame, the reverse gear box (4) is fixedly connected to the handrail frame, and the forward pulley (5) is sleeved and fixed on the worm connecting shaft (6); It also includes a tensioning plate assembly (15), which is rotatably connected to the handrail frame via a rotating shaft and is closely arranged on one side of the driving belt (3) via a roller thereon. One end of the tensioning plate assembly (15) is also fixedly connected to a control pull wire (17), which is connected to the handrail frame, and a tensioning reset spring (16) is sleeved on the control pull wire (17), and the tensioning reset spring (16) is close to one end of the tensioning plate assembly (15).

2. The reverse gear control structure of a micro-tillage machine according to claim 1, characterized in that: The tensioning plate assembly (15), the tensioning return spring (16) and the control pull wire (17) are each provided in two groups, and the two groups of tensioning plate assemblies (15), the tensioning return spring (16) and the control pull wire (17) correspond one to one to the two groups of driving belts (3) respectively.

3. The reverse gear control structure of a micro-tillage machine according to claim 1, characterized in that: The reverse gear box (4) comprises a gear 1 (18), a gear 2 (24) and a housing (19); the gear 1 (18) is meshed with the gear 2 (24) through gear teeth and both are arranged inside the housing (19); the gear 1 (18) is sleeved and fixed on a shaft sleeve (21), and both ends of the shaft sleeve (21) are rotatably connected to the housing (19) through fully sealed bearings (20); the shaft sleeve (21) is sleeved and fixed on a worm connecting shaft (6); the gear 2 (24) is sleeved and fixed on a shaft (23), and the upper end of the shaft (23) is connected to a reverse pulley (2).

4. The reverse gear control structure of a micro-tillage machine according to claim 3, characterized in that: The housing (19) is provided with an oil nozzle (27).

5. The reverse gear control structure of a micro-tillage machine according to claim 3, characterized in that: The housing (19) is provided with an upper and lower part, and the housing (19) is fixedly connected by bolts (25) and nuts (26).

6. The reverse gear control structure of a micro-tillage machine according to claim 5, characterized in that: The outer circumference of the shell (19) is integrally connected with three groups of mounting seats, and a shock-absorbing rubber ring (13) and a bushing (14) are clamped and arranged on the mounting seats, the bushing (14) is arranged inside the shock-absorbing rubber ring (13), and a large gasket (12) and an assembly bushing (10) are respectively arranged on the outer side of the shock-absorbing rubber ring (13), and the large gasket (12) and the assembly bushing (10) are both sleeved on a bolt (11), and the bolt (11) is fixedly connected to the handrail frame.

7. The reverse gear control structure of a micro-tillage machine according to claim 1, characterized in that: The driving pulley (9) is integrally connected with a belt groove 1 (91) and a belt groove 2 (92), and the belt groove 1 (91) and the belt groove 2 (92) are both provided with two sets of driving belts (3), which respectively drive the reverse pulley (2) and the forward pulley (5).

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