Four-wheel-drive mini-tiller

Abstract

The utility model provides a four-wheel-drive mini-tiller which comprises a tiller head part, a supporting frame, a gearbox, an auxiliary wheel, an output shaft, a transmission mechanism, a first belt wheel, a belt and a second belt wheel. The gearbox is connected with the output shaft through the transmission mechanism, and the belt transmission is additionally arranged on the gearbox to be connected with the driving mechanism, so that the problem of overload tooth breaking of the gearbox is prevented by utilizing slipping of the belt transmission; in addition, through the design of the driving mechanism, an old-fashioned two-drive mini-tiller can be directly and additionally provided with an auxiliary wheel, two-drive is directly changed into four-drive at low cost, and the agricultural production investment of common people is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro ploughing machine equipment technical field, concretely relates to a four-wheel drive micro ploughing machine. BACKGROUND

[0002] The original two-wheel drive micro ploughing machine makes the two-wheel drive micro ploughing machine work at a uniform speed by pushing, pulling, shaking, lifting and pressing in the rotary ploughing, which is laborious and needs certain skills, and the two-wheel drive micro ploughing machine cannot work normally without the above-mentioned method. The four-wheel drive micro ploughing machine can eliminate the problem, so the output of the four-wheel drive micro ploughing machine is greatly improved. Generally, the rear wheel driving mode of the four-wheel drive micro ploughing machine is realized in the form that a transmission shaft is connected to an output shaft of a machine head, then the transmission shaft is connected to a gearbox, and the gearbox is connected to the rear wheel. However, the power of the machine head is high, so the torque on the gear at the front end of the gearbox is large, and when the auxiliary wheel is stuck with grass, the gear at the front end of the gearbox is prone to tooth collision. The two-wheel drive micro ploughing machine has a history of 20 years, and the two-wheel drive micro ploughing machine is widely used, the accessories are easy to buy, and the technology is stable. The existing four-wheel drive micro ploughing machine rear drive cannot be upgraded and installed on the old micro ploughing machine due to the mismatch of the speed and the mismatch of the structural parts. SUMMARY

[0003] The utility model aims at designing a four-wheel drive micro ploughing machine to solve the problem in the background art. To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a support frame connected to a machine head, a gearbox fixedly connected to the support frame, an output end of the gearbox fixedly connected to an auxiliary wheel, a transmission mechanism connected to an output shaft of the machine head, an output end of the transmission mechanism fixedly connected to a first pulley, and a second pulley fixedly connected to the input end of the gearbox and connected to the first pulley by a belt.

[0004] Further, the transmission mechanism includes a transmission shaft connected to the output shaft, a fixed box fixedly connected to the support frame, a first helical gear rotatably connected to the fixed box, and a second helical gear rotatably connected to the fixed box and meshing with the first helical gear, the second helical gear being fixedly connected to the first pulley.

[0005] Further, the first helical gear and the second helical gear are rotatably connected to the fixed box in the form of a rotating shaft connected to the fixed box bearing, and the ends of the rotating shaft are fixedly connected to the transmission shaft and the first pulley.

[0006] Further, the first pulley and the second pulley include a conical table, and the conical table is provided with a plurality of grooves.

[0007] Further, the inclination directions of the two conical tables are opposite.

[0008] Further, the support frame is provided with a fixing plate, and the fixing plate is provided with a tensioning mechanism for tensioning the belt.

[0009] Further, the tensioning mechanism comprises an adjusting rod mounted on the fixing plate, and a tensioning wheel is rotationally connected to the adjusting rod, and the outer circle of the tensioning wheel tightly presses the belt.

[0010] Further, the adjusting rod is slidingly connected with the fixing plate, a U-shaped plate is fixedly connected to the top of the adjusting rod, and the U-shaped plate is rotationally connected with the adjusting rod through a rotating shaft.

[0011] Further, a spring is sleeved on the adjusting rod, the spring is located between the U-shaped plate and the fixing plate, the adjusting rod is a square shaft, a baffle is arranged at the bottom of the adjusting rod, and the baffle prevents the adjusting rod from being pulled out.

[0012] Further, the fixing plate is provided with an adjusting plate, the adjusting plate is provided with a notch, and a first bolt passes through the notch to fix the adjusting rod on the adjusting plate, so that the height of the tensioning wheel can be adjusted.

[0013] Further, the bottom of the fixing plate is provided with a sleeve matched with the adjusting rod in a gap, and a second bolt for clamping the adjusting rod is threadedly connected to the sleeve.

[0014] Further, the inside of the gearbox is provided with a reverse locking mechanism for preventing the auxiliary wheel from driving the gearbox to rotate.

[0015] Further, the reverse locking mechanism comprises a worm and gear transmission mechanism, the worm is connected with a first gear close to the input end of the gearbox, and the worm wheel is connected with a second gear close to the auxiliary wheel.

[0016] Alternatively, the reverse locking mechanism comprises a fixing shaft fixedly connected to the inside of the gearbox, the fixing shaft is fixedly connected with a locking gear, and the inside of the gearbox is provided with a gear shifting gear; when the gear shifting gear is engaged with the locking gear, the second pulley is idling, and the auxiliary wheel is locked.

[0017] Compared with the prior art, the gearbox is connected with the driving mechanism through belt transmission, so that the slippage of the belt transmission is utilized to prevent the gearbox from overloading and tooth punching; in addition, through the design of the driving mechanism, the old two-wheel drive mini-cultivator can be directly provided with an auxiliary wheel, so that the two-wheel drive is directly changed into four-wheel drive at low cost, and the agricultural production investment of the public is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Fig. 1 It is a schematic diagram of the overall structure of the present application.

[0020] Fig. 2 It is a schematic diagram of the partial section of the present application.

[0021] Wherein: 1, transmission shaft; 2, transmission mechanism; 3, tensioning mechanism; 4, auxiliary wheel; 5, gearbox; 6, support frame; 7, head; 8, with slot; 9, tensioning wheel; 10, second pulley; 11, U-shaped plate; 12, spring; 13, fixed plate; 14, adjusting rod; 15, baffle; 16, belt; 17, first pulley; 18, second bevel gear; 19, first bevel gear. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined application purposes, the following will combine the drawings and preferred embodiments to specifically describe the specific embodiments, structures, features and effects of the present application.

[0023] Embodiment: please refer to Figs. 1-2 A four-wheel drive mini-cultivator, comprising a support frame 6 connected with a head 7, a gearbox 5 fixedly connected on the support frame 6, an auxiliary wheel 4 fixedly connected on the output end of the gearbox 5, a transmission mechanism 2 connected with an output shaft of the head 7, a first pulley 17 fixedly connected on the output end of the transmission mechanism 2, a second pulley 10 fixedly connected on the input end of the gearbox 5 through a belt 16 connected with the first pulley 17; wherein the output shaft is one of the output shafts in the head 7 (this shaft is a multifunctional interface originally provided by the head, commonly used to install a water pump to pump water, which is a kind of full-power output shaft), the auxiliary wheel 4 of the present application is connected with the output shaft through the transmission mechanism 2, so as to realize the rotation of the auxiliary wheel 4; therefore, the second pulley 10 in the present application is connected with the first pulley 17 through the belt 16, and the slip between the belt 16 and the pulley is used to prevent the problem of overloading and tooth striking of the gearbox 5.

[0024] The transmission mechanism 2 comprises a transmission shaft 1 connected with an output shaft, a fixed box fixed on a support frame 6, a first helical gear 19 rotationally connected with the fixed box, a second helical gear 18 meshing with the first helical gear 19 and rotationally connected with the fixed box, and the second helical gear 18 is fixed with a first pulley 17, wherein the transmission shaft 1 can be a transmission soft shaft or a transmission hard shaft, and the torque generated by the diesel engine in the head part 7 can be transmitted to the first helical gear 19, so as to drive the first pulley 17 to rotate, thereby realizing the belt transmission of the belt 16; wherein the rotationally connected manner of the first helical gear 19 and the second helical gear 18 with the fixed box can adopt the form of shaft rotationally connected with the fixed box bearing, and the end of the shaft is distributed and fixed with the transmission shaft 1 and the first pulley 17; in addition, the fixed box can be communicated with the transmission box 5, that is, the first helical gear 19 and the second helical gear 18 are located inside the transmission box 5, so as to be lubricated by the oil inside the transmission box 5; and the first pulley 17 and the second pulley 10 comprise a conical table, each conical table is provided with three belt grooves 8, so as to further increase the transmission ratio between the transmission shaft 1 and the auxiliary wheel 4, and enrich the rotating speed of the auxiliary wheel 4; the inclination directions of the two conical tables are opposite, which is beneficial to improve the transmission ratio between the first pulley 17 and the second pulley 10; the support frame 6 is provided with a fixed plate 13, the fixed plate 13 is provided with a tensioning mechanism 3 for tensioning the belt 16, so as to ensure that the belt 16 is in a tensioning state during normal work of the mini-tiller; the tensioning mechanism 3 comprises an adjusting rod 14 mounted on the fixed plate 13, the adjusting rod 14 is rotationally connected with a tensioning wheel 9, the outer circle of the tensioning wheel 9 tightly presses the belt 16, the adjusting rod 14 is slidingly connected with the fixed plate 13, the top of the adjusting rod 14 is fixed with a U-shaped plate 11, the U-shaped plate 11 is rotationally connected with the adjusting rod 14 through a rotating shaft, so as to realize the tensioning of the belt 16; in one embodiment, the bottom of the fixed plate 13 is provided with a sleeve in gap cooperation with the adjusting rod 14, the sleeve is threadedly connected with a second bolt for tightly pressing the adjusting rod 14, so that by loosening and tightening the second bolt, the height of the adjusting rod 14 can be adjusted, thereby adjusting the height of the tensioning wheel 9; in other embodiments, the adjusting rod 14 is sleeved with a spring 12, the spring 12 is located between the U-shaped plate 11 and the fixed plate 13, under the action of the spring 12, the belt 16 can be kept in a tensioning state during use, and manual alignment is not required for debugging; the adjusting rod 14 is a square shaft, which prevents the tensioning wheel 9 from rotating circumferentially;

[0025] In the use process of the mini-cultivator, when going downhill, the auxiliary wheel 4 needs to be stopped from rotating to ensure the normal walking speed of the mini-cultivator. At this time, the auxiliary wheel 4 does not rotate, that is, it is in a static state, and only then can the downhill speed of the mini-cultivator be well adjusted, so as not to be too fast. In the above embodiment, although the conventional gearbox 5 has a neutral position, when the gearbox 5 is in the neutral position, the auxiliary wheel 4 will still rotate, which is not conducive to the adjustment of the downhill speed of the mini-cultivator. At this time, the mini-cultivator changes from automatic forward movement to manual lifting or pressing to control the forward speed. Therefore, in one embodiment, the inside of the gearbox 5 is provided with a reverse locking mechanism for preventing the auxiliary wheel 4 from driving the gearbox 5 to rotate, so as to realize one-way locking of the auxiliary wheel 4. Thus, the auxiliary wheel 4 is in a static state, which is conducive to controlling the downhill speed of the mini-cultivator. The reverse locking mechanism in one embodiment includes a worm and gear transmission mechanism 2, the worm is connected with a first gear near the input end of the gearbox 5, and the worm wheel is connected with a second gear near the auxiliary wheel 4. In this embodiment, the self-locking performance of the worm and gear is utilized, that is, the worm wheel cannot drive the worm to rotate, so as to prevent the auxiliary wheel 4 from rotating autonomously. When going downhill, the gearbox 5 only needs to be adjusted to the neutral position. At this time, the auxiliary wheel 4 will not rotate autonomously under the action of the worm and gear, thereby facilitating the adjustment of the downhill speed of the mini-cultivator. In other embodiments, the reverse locking mechanism includes a fixed shaft fixedly connected to the inside of the gearbox 5, the fixed shaft is fixedly connected with a locking gear, and the inside of the gearbox 5 is provided with a gear shifting gear. When the gear shifting gear meshes with the locking gear, the second pulley 10 idles, and the auxiliary wheel 4 is locked. The gear shifting gear is a common gear used for gear shifting of the gearbox, which can make the gearbox be in gear one, gear two, neutral position or reverse gear teeth. Therefore, on this basis, a locking gear is added. When the gear shifting gear meshes with the locking gear, the second pulley 10 idles, and the auxiliary wheel 4 is locked, thereby facilitating the adjustment of the downhill speed of the mini-cultivator. When not working and walking on the road, the gearbox 5 is adjusted to the neutral position through the gear shifting gear. At this time, the locking gear does not mesh with the gear shifting gear, thereby ensuring the normal walking of the auxiliary wheel 4.

[0026] Working principle: The utility model discloses a auxiliary wheel 4 gearbox 5 is equipped with second pulley 10, and second pulley 10 is connected with first pulley 17 through belt 16, and first pulley 17 is connected with the output shaft of head part 7 through second bevel gear 18 and first bevel gear 19, to realize the rotation of auxiliary wheel 4, and second pulley 10 is connected with first pulley 17 through belt 16, so through the slip of belt 16 and pulley, prevent the problem of overloading and tooth of gearbox 5.

[0027] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where, when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "above", "below", "left", "right", "front", "back", and the like as used herein refer to the orientation of the figure in the drawing.

[0028] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to make equivalent embodiments with equivalent changes, but as long as it does not deviate from the technical solution of the present application, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A four-wheel micro cultivator, comprising a support frame (6) connected with a machine head (7), a gearbox (5) is fixedly connected on the support frame (6), an auxiliary wheel (4) is fixedly connected on an output end of the gearbox (5), characterized in that: The transmission mechanism (2) is connected with the output shaft of the head part (7), and a first pulley (17) is fixedly connected to the output end of the transmission mechanism (2); and a second pulley (10) is fixedly connected to the input end of the gearbox (5) and connected with the first pulley (17) through a belt (16).

2. The four-wheel micro-tractor of claim 1, wherein: The transmission mechanism (2) comprises a transmission shaft (1) connected with the output shaft, a fixed box fixedly connected to the support frame (6), a first helical gear (19) rotationally connected with the fixed box, and a second helical gear (18) meshing with the first helical gear (19) and rotationally connected with the fixed box, wherein the second helical gear (18) is fixedly connected with the first pulley (17).

3. The four-wheel micro-tractor of claim 1, wherein: The first pulley (17) and the second pulley (10) comprise a conical table, and a plurality of belt grooves (8) are arranged on the conical table.

4. The four-wheel micro-tractor of claim 3, wherein: The inclination directions of the two conical tables are opposite.

5. The four-wheel micro-tractor of claim 1, wherein: The support frame (6) is provided with a fixed plate (13), and the fixed plate (13) is provided with a tensioning mechanism (3) for tensioning the belt (16).

6. The four-wheel micro-tractor of claim 5, wherein: The tensioning mechanism (3) comprises an adjusting rod (14) mounted on the fixed plate (13), and a tensioning wheel (9) is rotationally connected to the adjusting rod (14), and the outer circle of the tensioning wheel (9) tightly presses the belt (16).

7. The four-wheel micro-tractor of claim 6, wherein: The adjusting rod (14) is slidingly connected with the fixed plate (13), the top of the adjusting rod (14) is fixedly connected with a U-shaped plate (11), and the U-shaped plate (11) is rotationally connected with the adjusting rod (14) through a rotating shaft. Alternatively, the fixed plate (13) is provided with an adjusting plate, the adjusting plate is provided with a slot, and a first bolt passes through the slot to fix the adjusting rod (14) on the adjusting plate. Alternatively, the bottom of the fixed plate is provided with a sleeve matched with the adjusting rod in a gap, and a second bolt for clamping the adjusting rod is threadedly connected to the sleeve.

8. The four-wheel micro-tractor of claim 7, wherein: A spring (12) is sleeved on the adjusting rod (14), the spring (12) is located between the U-shaped plate (11) and the fixed plate (13), and the adjusting rod (14) is a square shaft.

9. The four-wheel micro-tractor of claim 1, wherein: The gearbox (5) is provided with a reverse locking mechanism for preventing the auxiliary wheel (4) from driving the second pulley (10) to rotate.

10. The four-wheel micro-tractor of claim 9, wherein: The reverse locking mechanism comprises a worm and gear transmission mechanism (2), the worm is connected with a first gear close to the input end of the gearbox (5), and the worm wheel is connected with a second gear close to the auxiliary wheel (4). Alternatively, the reverse locking mechanism comprises a fixed shaft fixedly connected to the inside of the gearbox (5), the fixed shaft is fixedly connected with a locking gear, the inside of the gearbox (5) is provided with a shift gear, when the shift gear meshes with the locking gear, the second pulley (10) idles, and the auxiliary wheel (4) is locked.

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