Rotary cultivator convenient to adjust

Abstract

The utility model provides a rotary cultivator convenient to adjust, which comprises a tractor and a bottom plate arranged below the rear end of the tractor, a bottom frame is arranged above the bottom plate, two sides of the upper surface of the bottom frame close to the tail end are respectively provided with a bearing seat used for fixing a transmission shaft, one end of the transmission shaft is provided with a side plate, and the other end of the transmission shaft is provided with a side plate. A side transmission box is mounted at the other end of the transmission shaft; rotary tillage rake teeth are installed between the side plate and the side transmission box, a second chain wheel is installed in the center of the transmission shaft, and the second chain wheel is in transmission connection with a first chain wheel located on the outer side of the clutch box through a first chain. According to the rotary cultivator, an installation structure different from a traditional rotary cultivator is adopted, the rotary cultivator can be installed on a small tractor under the condition that the functions of the tractor are not changed without being limited by a connector needed for installation of the traditional rotary cultivator, the rotary cultivator is suitable for mountainous regions, hills and the like, and the original tractor can be used for ploughing during farming; in slack seasons, a carriage can be hung to carry goods, and the burden of farmers is further reduced.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural implements technology, and in particular relates to an easily adjustable rotary tiller. Background Technology

[0002] Rotary tillers are tillage machines that work in conjunction with tractors to perform tilling and harrowing operations. They are widely used because of their strong soil-breaking ability and the flat surface they leave after tilling; at the same time, they can chop up the stubble buried below the surface, making it easier for seeders to operate and providing a good seedbed for later sowing.

[0003] When existing rotary tillers are connected to tractors, the tractor's tail end needs to have a drive shaft that can provide power to the rotary tiller's gearbox. However, in some mountainous and hilly areas, large tractors are not flexible enough, so most of the tractors used are small tractors without drive shafts, which are difficult to adapt to existing rotary tillers. This results in slow tillage efficiency in mountainous and hilly areas, affecting crop cultivation. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a rotary tiller that is easy to adjust.

[0005] The technical solution adopted is as follows: an easily adjustable rotary tiller includes a tractor and a base plate set below the rear end of the tractor. A base frame is installed on the top of the base plate. A bearing seat for fixing a drive shaft is installed on both sides of the upper surface of the base frame near the rear end. A side plate is installed at one end of the drive shaft, and a side transmission box is installed at the other end of the drive shaft. Rotary tillage harrow teeth are installed between the side plate and the side transmission box. A second sprocket is installed at the center of the drive shaft. The second sprocket is connected to the first sprocket located outside the clutch box via a first chain.

[0006] The first sprocket is installed at one end of the driven shaft, and a driven gear is installed in the driven shaft. A main shaft is provided inside the clutch box and on one side of the driven shaft. A sliding gear that meshes with the driven gear is provided in the middle of the main shaft. A pulley is provided at one end of the main shaft through the clutch box. The pulley is connected to the pulley at the tractor engine through a transmission belt.

[0007] Furthermore, the surface of the main shaft is provided with a sliding groove, and a pin is provided on one side of the sliding gear, which is inserted into the sliding groove. A retaining ring is fixed on the other side of the sliding gear. An extension plate is fitted inside the retaining ring, and a pull rod is connected to the outer end of the extension plate. One end of the pull rod passes through the clutch box and is connected to a grip. A spring is fitted on the outside of the pull rod and inside the clutch box. By pulling the grip, the sliding gear can be moved along the length of the main shaft. Furthermore, a protrusion is provided on one side of the grip. After pulling the grip, rotating it by a certain angle, the protrusion can be locked in the recessed position on the outer end of the locking block. The locking block is located outside the clutch box and directly above the grip. After the protrusion contacts the locking block, even if the user releases the grip, the sliding gear remains separated from the driven gear.

[0008] Furthermore, a drive wheel is installed at one end of the drive shaft located inside the side transmission box. This drive wheel is connected to the rotary shaft inside the rotary tillage harrow teeth via a drive belt, thereby realizing the transmission connection between the drive shaft and the rotary tillage harrow teeth.

[0009] Furthermore, the clutch box is welded and fixed to the rear end of the tractor, and a fixing plate is provided above the clutch box. Two stiffening plates for connecting the boom are provided on the outer side of the fixing plate. A forearm is movably connected to the other end of the boom. An ear seat connected to a hydraulic cylinder is provided below the boom. The lower end of the hydraulic cylinder is mounted on the base frame above the base frame through another ear seat. A tripod is provided above the side plate and the side transmission box. A lifting rod is installed between the two tripods. One end of the forearm is connected to the lifting rod. The lifting rod can be raised by rotating the boom through the hydraulic cylinder.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This utility model adopts an installation structure different from traditional rotary tillers. It can be installed behind a small tractor without being restricted by the connector required for the installation of traditional rotary tillers. It is suitable for mountainous and hilly areas. The original tractor can be used to plow the land during farming and can be attached to a cargo box to haul goods during the off-season. It can be used for two purposes and further reduce the burden on farmers.

[0012] This invention improves the transmission structure to enable rotary tillers to be used with small tractors. Unlike the traditional rotary tiller drive shaft connection, this solution uses a drive belt to directly transmit the tractor engine's power to the clutch. During operation, the rotary tiller can be started and stopped by pulling the grip. Compared to the drive shaft connection, the rear rotary tiller is unstable and prone to swaying. This invention, by fixing the entire rear rotary tiller harrow teeth to the top of the base frame and securing it with bearing seats, avoids the rear rotary tiller harrow teeth from shaking, improves the stability of tilling, and extends the service life of the connection between the rotary tiller and the tractor.

[0013] The rotary tiller teeth provided by this utility model can be raised or lowered under the control of a hydraulic cylinder, which is more flexible than the traditional rotary tiller that uses the lifting arm of the tractor to achieve the lifting action. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the side transmission box of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the clutch box of this utility model;

[0017] Figure 4 This is a schematic diagram of the grip structure of this utility model;

[0018] Figure 5 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 6 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point B;

[0020] Figure 7 This is a utility model Figure 1 Enlarged schematic diagram of the structure at point C;

[0021] Figure 8 This is a schematic diagram of the sliding gear mounting structure of this utility model.

[0022] In the picture:

[0023] 1-Base frame, 11-Base plate, 12-Bearing seat, 2-Drive shaft, 21-Second sprocket, 22-First chain, 3-Side plate, 4-Side transmission box, 41-Second chain, 5-Triangle frame, 6-Rotary harrow teeth, 7-Lifting rod, 71-Forearm, 72-Arm, 73-Fixing plate, 74-Firming plate, 8-Hydraulic cylinder, 9-Clutch box, 91-Main shaft, 92-Pulley, 93-Sliding gear, 94-Driven shaft, 95-Driven gear, 96-First sprocket, 97-Extension plate, 98-Grip sleeve, 99-Spring, 910-Clamping block, 911-Slide groove, 912-Pin, 913-Protrusion, 914-Clamping ring. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] As attached Figure 1-8 As shown.

[0026] An easily adjustable rotary tiller includes a tractor body, with a base plate 11 welded to the lower rear end of the tractor to support a chassis 1. The chassis 1 and the base plate 11 are fixedly connected by bolts. (See attached diagram) Figure 1 As shown, a bearing seat 12 for fixing the drive shaft 2 is installed on both sides of the upper surface of the base frame 1 near the tail end. A side plate 3 is installed at one end of the drive shaft 2, and a side transmission box 4 is installed at the other end of the drive shaft 2. Rotary tillage harrow teeth 6 are installed between the side plate 3 and the side transmission box 4. A transmission wheel is installed at one end of the drive shaft 2 located in the side transmission box 4. The transmission wheel is connected to the rotary shaft inside the rotary tillage harrow teeth 6 through a transmission belt. When the drive shaft 2 rotates, it can synchronously drive the rotary tillage harrow teeth 6 to rotate.

[0027] Furthermore, in order to realize the rotation of the aforementioned drive shaft 2, a second sprocket 21 is installed at the center of the drive shaft 2. The second sprocket 21 is connected to a first chain 22, and the other end of the first chain 22 is connected to a first sprocket 96 located outside the clutch box 9.

[0028] The first sprocket 96 is installed at one end of the driven shaft 94, and a driven gear 95 is installed in the middle of the driven shaft 94. A main shaft 91 is provided inside the clutch box 9 and on one side of the driven shaft 94. A sliding gear 93 that meshes with the driven gear 95 is provided in the middle of the main shaft 91.

[0029] One end of the main shaft 91 passes through the clutch box 9 and is equipped with a pulley 92. The pulley 92 is externally connected to a transmission belt, and the other end of the transmission belt is connected to a pulley at the tractor engine. Through the transmission of the pulley, the main shaft 91 rotates. The main shaft 91 drives the driven shaft 94 to rotate under the meshing connection of the sliding gear 93 and the driven gear 95. The driven shaft 94 is connected to the first sprocket 96 and the first chain 22 on one side. The other end of the first chain 22 is connected to the second sprocket 21, which drives the transmission shaft 2 to rotate. Through the transmission wheel and transmission belt located in the side transmission box 4 of the transmission shaft 2, the rotary tillage harrow teeth 6 can be driven to work.

[0030] The aforementioned sliding gear 93 adopts a sliding mounting structure. A long rectangular groove 911 is formed on the surface of the main shaft 91. A pin 912 is provided on one side of the sliding gear 93 and inserted into the groove 911. A retaining ring 914 is welded to the other side of the sliding gear 93. The cross-section of the retaining ring 914 is an "L" structure with a counterclockwise inclination of 90 degrees. An extension plate 97 is fitted inside the retaining ring 914. A pull rod is connected to the outer side of the extension plate 97. One end of the pull rod passes through the clutch housing 9 and is connected to a grip sleeve 98. The part of the pull rod inside the clutch housing 9 is located on the outer side. The set includes a spring 99, which, under the action of the spring 99, can push the sliding gear 93 to one end of the slide groove 911. At this time, the sliding gear 93 and the driven gear 95 are engaged. By pulling the grip sleeve 98, the sliding gear 93 can be pulled to the other end of the slide groove 911, so that the sliding gear 93 and the driven gear 95 are separated. A protrusion 913 is provided on one side of the grip sleeve 98. After pulling the grip sleeve 98, it can be rotated at a certain angle so that the protrusion 913 is locked in the position of the locking block 910 on the outside of the clutch box 9, thus keeping the sliding gear 93 and the driven gear 95 in a separated state.

[0031] During the above process, the extension plate 97 is movably mounted inside the retaining ring 914. Therefore, when the main shaft 91 drives the sliding gear 93 to rotate, the extension plate 97 will not rotate with it. However, by pulling the extension plate 97, the sliding gear 93 can be moved along the length of the main shaft 91.

[0032] The clutch box 9 is welded and fixed to the rear end of the tractor, and a long rectangular fixing plate 73 is also provided above the clutch box 9. Two stiffening plates 74 for connecting the boom 72 are provided on the outer side of the fixing plate 73. The forearm 71 is movably connected to the other end of the boom 72 by a connecting pin. An ear seat is provided in the middle position below the boom 72, and the ear seat is connected to the hydraulic cylinder 8 installed above the base frame 1.

[0033] Furthermore, a tripod 5 is provided above both the side plate 3 and the side transmission box 4, and a lifting rod 7 is installed between the two tripods 5. One end of the forearm 71 is connected to the middle position of the lifting rod 7. In use, the hydraulic cylinder 8 extends, and the boom 72 can be rotated upward with the connection point with the stiffening plate 74 as the center. While rotating, the forearm 71 is driven to rise. Through the connection between the forearm 71 and the lifting rod 7, the rotary tiller installed at the tail end of the base frame 1 can be lifted up.

[0034] When in use, while driving on the road, pulling the grip 98 disengages the sliding gear 93 and the driven gear 95. At this time, the transmission in the clutch box 9 is disconnected, the rotary tiller teeth 6 stop rotating, and the rotary tiller is lifted away from the ground by the hydraulic cylinder 8. When tilling the land, pushing the grip 98 engages the sliding gear 93 and the driven gear 95, reconnecting the transmission in the clutch box 9. The rotary tiller teeth 6 at the tail end resume rotation. The rotary tiller teeth 6 can be lowered by retracting the hydraulic cylinder 8. The tilling depth can be controlled by controlling the retraction stroke of the hydraulic cylinder 8.

[0035] To disassemble the rotary tiller, simply remove the bolts between the base frame 1 and the base plate 11, remove the first chain 22, and remove the fixing pin at the connection between the stiffening plate 74 and the boom 72.

[0036] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. An easily adjustable rotary tiller, comprising a tractor and a base plate (11) disposed below the rear end of the tractor, characterized in that, A base frame (1) is installed above the base plate (11). A bearing seat (12) for fixing the drive shaft (2) is installed on both sides of the upper surface of the base frame (1) near the tail end. A side plate (3) is installed at one end of the drive shaft (2), and a side transmission box (4) is installed at the other end of the drive shaft (2). Rotary harrow teeth (6) are installed between the side plate (3) and the side transmission box (4). A second sprocket (21) is installed at the center of the drive shaft (2). The second sprocket (21) is connected to the first sprocket (96) located outside the clutch box (9) via the first chain (22). The first sprocket (96) is installed at one end of the driven shaft (94), and a driven gear (95) is installed in the driven shaft (94). A main shaft (91) is provided inside the clutch box (9) and on one side of the driven shaft (94). A sliding gear (93) that meshes with the driven gear (95) is provided in the middle of the main shaft (91). One end of the main shaft (91) passes through the clutch box (9) and is provided with a pulley (92). The pulley (92) is connected to the pulley at the tractor engine through a transmission belt.

2. The easily adjustable rotary tiller as described in claim 1, characterized in that: The main shaft (91) has a groove (911) on its surface. A pin (912) is provided on one side of the sliding gear (93) and inserted into the groove (911). A retaining ring (914) is fixed on the other side of the sliding gear (93). An extension plate (97) is fitted inside the retaining ring (914). A pull rod is connected to the outer side of the extension plate (97). One end of the pull rod passes through the clutch box (9) and is connected to a grip sleeve (98). A spring (99) is fitted on the outside of the pull rod and inside the clutch box (9).

3. The easily adjustable rotary tiller as described in claim 2, characterized in that: The cross-section of the retaining ring (914) is an "L" structure tilted counterclockwise at 90°.

4. The easily adjustable rotary tiller as described in claim 2, characterized in that: A protrusion (913) is provided on one side of the grip (98). After the grip (98) is pulled, it is rotated at a certain angle and the protrusion (913) is locked in the recessed position at the outer end of the locking block (910). The locking block (910) is provided outside the clutch box (9) and is located directly above the grip (98).

5. The easily adjustable rotary tiller as described in claim 1, characterized in that: A drive wheel is installed at one end of the drive shaft (2) located inside the side drive box (4), and the drive wheel is connected to the rotary shaft inside the rotary harrow teeth (6) via a drive belt.

6. The easily adjustable rotary tiller as described in claim 1, characterized in that: The clutch box (9) is welded and fixed to the rear end of the tractor, and a fixing plate (73) is provided above the clutch box (9). Two stiffening plates (74) for connecting the boom (72) are provided on the outer side of the fixing plate (73). A forearm (71) is movably connected to the other end of the boom (72).

7. The easily adjustable rotary tiller as described in claim 6, characterized in that: A tripod (5) is provided above both the side plate (3) and the side transmission box (4), and a lifting rod (7) is installed between the two tripods (5). One end of the forearm (71) is connected to the lifting rod (7).

8. The easily adjustable rotary tiller as described in claim 6, characterized in that: A lug is provided below the boom (72) to connect with a hydraulic cylinder (8), and the lower end of the hydraulic cylinder (8) is mounted on the base frame (1) via another lug.

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