Gear device of rotary cultivator

Abstract

The utility model discloses a gear device of a rotary cultivator, which is characterized by comprising a sleeve connected with a power output shaft, threads are arranged on the left side of the sleeve, a first friction plate, a gear, a second friction plate, a pressure plate, a top plate, a locking plate and a locking plate nut are sequentially arranged on the sleeve from right to left, the top plate is a round plate body, a plurality of threaded holes are arranged on the top plate, and the locking plate nut is arranged on the top plate. A fastening bolt is screwed into the threaded hole and is used for propping against the pressure plate; the device is reasonable in overall structure and convenient to install, the extrusion force on the gear can be adjusted through the fastening bolt, and the chain can be effectively prevented from being overloaded and fractured through the device.

Description

Technical Field

[0001] This utility model belongs to the field of power transmission technology for rotary tillers, and specifically relates to a gear device for rotary tillers. Background Technology

[0002] Rotary tillers are tillage machines used in conjunction with tractors to perform tilling and harrowing operations. They are characterized by their strong soil-breaking ability and the ability to flatten the soil surface after tilling. The power unit of a rotary tiller is connected to a universal output shaft or drive shaft in the gearbox, and the power is transmitted to the rotary blade shaft via a chain. Therefore, a gear needs to be installed at one end of the universal output shaft or drive shaft. Currently, the structure directly installs a drive gear on the output shaft or drive shaft to connect the chain. This structure has a drawback: when the rotary tiller encounters hard or complex soil during operation, it causes the rotary tiller to work under overload, which increases the load on the chain and can lead to breakage in severe cases. Summary of the Invention

[0003] The purpose of this invention is to design a gear device for a rotary tiller that can effectively prevent chain overload and breakage.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A rotary tiller gear device is characterized in that it includes a sleeve connected to a power output shaft. The sleeve has a thread on its left side. From right to left, the sleeve is sequentially equipped with a first friction plate, a gear, a second friction plate, a pressure plate, a top plate, a locking plate, and a locking plate nut. The top plate is a circular disc with several threaded holes. Fastening bolts are screwed into the threaded holes to hold the pressure plate in place.

[0006] Furthermore, a positioning groove is provided in the threaded area of ​​the sleeve, and an end is provided on the right side of the sleeve.

[0007] Furthermore, corresponding to the positioning groove, the inner ring of the pressure plate and the top plate is provided with a limiting protrusion.

[0008] Furthermore, the number of threaded holes and fastening bolts is at least three, and they are evenly distributed on the top plate.

[0009] Furthermore, the power take-off shaft and the sleeve are connected by a key.

[0010] Furthermore, the locking piece is annular in shape, with locking elements around its perimeter, which are used to engage with slots on the surface of the top plate.

[0011] The above technical solution can achieve the following beneficial effects:

[0012] This invention installs friction plates on both sides of the gear. The pressure plate is held in place by the fastening bolts of the top plate, and the pressure plate squeezes the friction plates. The two friction plates also squeeze the gear, so the gear can drive the chain normally. When the rotary tiller is overloaded and the chain is overloaded, that is, when the pressure of the friction plates against the gear is less than the overload force of the chain, the gear will rotate, preventing the chain from breaking.

[0013] The overall structure of this utility model is relatively reasonable and easy to install. The clamping force on the gear can be adjusted by tightening the bolts. This utility model device can effectively prevent the chain from breaking due to overload. Attached Figure Description

[0014] Figure 1 This is a side view of the gear assembly.

[0015] Figure 2 This is a side view of the sleeve structure.

[0016] Figure 3 It is a plan view of a gear.

[0017] Figure 4 This is a plan view of the friction plate.

[0018] Figure 5 This is a plan view of the pressure plate.

[0019] Figure 6 This is the top plan.

[0020] Figure 7 This is a schematic diagram of the locking plate.

[0021] In the picture:

[0022] In the diagram: 1. Sleeve; 2. First friction plate; 3. Gear; 4. Second friction plate; 5. Pressure plate; 6. Top plate; 7. Fastening bolt; 8. Locking plate; 9. Locking plate nut; 11. Limiting protrusion; 10. Clamp; 12. Positioning groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figure 1-6As shown, a rotary tiller gear device includes a sleeve 1, with the right side of the sleeve being the end and the left side having threads. An axial positioning groove 12 is also formed in the threaded area. From right to left, the sleeve is sequentially fitted with a first friction plate 2, a gear 3, a second friction plate 4, a pressure plate 5, a top plate 6, a locking plate 8, and a locking plate nut 9. The first friction plate 2 and the second friction plate 4 are the same size. Both the pressure plate 5 and the top plate 6 are circular discs. The top plate 6 has several threaded holes into which fastening bolts 7 are screwed. The fastening bolts 7 are used to hold the pressure plate 5 in place. The locking plate 8 is annular, with retaining clips 10 around its circumference. These clips are used to engage with the retaining grooves on the surface of the top plate, thus ensuring the stability of the top plate and the locking plate. The locking plate nut 9 is then installed into the threaded area of ​​the sleeve and tightened.

[0025] Based on the above embodiments: Since the threaded area of ​​the sleeve 1 has a positioning groove 12, and corresponding to the positioning groove 12, the inner rings of the pressure plate 5 and the top plate 6 are provided with limiting protrusions 11, so that the pressure plate 5 and the top plate 6 can be effectively fixed on the sleeve during the assembly process.

[0026] Based on the above embodiments: the number of threaded holes and fastening bolts is at least 3, and they are evenly distributed on the top plate.

[0027] Based on the above embodiments: the power output shaft and the sleeve 1 are connected by a key. Alternatively, the inner hole of the sleeve 1 can be designed as a polygon, and the power output shaft can also be designed as a polygon. Power transmission can be achieved through polygonal connection.

[0028] Specific embodiment: The output end of the rotary tiller gearbox is connected to the power transmission shaft, which is inserted from the right side of the sleeve 1 and connected by a key. The first friction plate 2, gear 3, and second friction plate 4 are installed sequentially from the left side of the sleeve 1. The limiting protrusions 11 of the pressure plate 5 and the top plate 6 are aligned with the positioning grooves 12 of the sleeve 1 and installed sequentially. Finally, the locking plate 8 and locking plate nut 9 are installed on the sleeve. When pressing the gear, the fastening bolts are tightened. It should be noted that several fastening bolts need to be applied with uniform pressure. If the fastening bolts rotate clockwise to gradually increase the pressure, the greater the pressure on the pressure plate 5, the more firmly the two friction plates press the gear. Therefore, the pressing force applied to the pressure plate needs to be adjusted appropriately according to the chain's bearing capacity. When the chain is overloaded, the gear will rotate and idle, thus protecting the chain. When the chain is in normal operation, the gear is squeezed by the two friction plates, ensuring that the gear drives the chain to transmit power normally.

[0029] The above descriptions are all preferred embodiments of this utility model. For those skilled in the art, any modifications to this utility model in various equivalent forms without departing from the principle of this utility model shall fall within the protection scope of the appended claims.

Claims

1. A gear mechanism for a rotary tiller, characterized in that: Includes a sleeve (1) connected to the power output shaft. The sleeve (1) has a thread on its left side. The sleeve is installed from right to left with a first friction plate (2), a gear (3), a second friction plate (4), a pressure plate (5), a top plate (6), a locking plate (8), and a locking plate nut (9). The top plate (6) is a circular disc with several threaded holes. Fastening bolts (7) are screwed into the threaded holes to hold the pressure plate (5).

2. The rotary tiller gear device according to claim 1, characterized in that: The sleeve (1) also has a positioning groove (12) in the threaded area, and the sleeve (1) has an end on the right side.

3. A rotary tiller gear device according to claim 1 or 2, characterized in that: Corresponding to the positioning groove (12), the inner ring of the pressure plate (5) and the top plate (6) is provided with a limiting protrusion (11).

4. A rotary tiller gear device according to claim 1, characterized in that: The number of threaded holes and fastening bolts is at least three, and they are evenly distributed on the top plate.

5. A rotary tiller gear device according to claim 1, characterized in that: The power output shaft and the sleeve (1) are connected by a key.

6. A rotary tiller gear device according to claim 1, characterized in that: The locking piece (8) is in the shape of a ring, with a locking element around the ring. The locking element is used to lock into the slot on the surface of the top plate.

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