Small multifunctional electric farming machine

Abstract

This invention discloses a small, multi-functional electric tiller, including a tractor, a rotary tiller, and a lifting bracket mechanism located at the rear of the tractor for raising and lowering the rotary tiller. The lifting bracket mechanism is equipped with a quick-release frame for assembling and disassembling the rotary tiller. The rotary tiller includes a support frame for fastening to the quick-release frame, a rotary blade motor mounted on the support frame, a transmission assembly located in the middle of the support frame and connected to the rotary blade motor for power transmission, and left and right rotary blades mounted on either side of the lower end of the transmission assembly. The quick-release frame between the lifting bracket mechanism and the rotary tiller allows for rapid assembly and disassembly, facilitating the replacement and maintenance of the rotary tiller and enabling quick replacement with agricultural mechanisms of different functions, such as a lawnmower.

Description

Technical fields:

[0001] This invention relates to the field of agricultural machinery, and specifically to a small, multi-functional electric tiller. Background technology:

[0002] Currently, large-scale agricultural tillage machinery mainly consists of two parts: the locomotive and the tillage device. The locomotive is generally a diesel-powered tractor, while the tillage device is mounted on the locomotive or towed by it to operate in the fields. With the continuous development of new energy technologies, small and medium-sized agricultural tillage machines on the market are gradually adopting electric tractors as their power source. Compared to traditional tractors, electric tractors are not only energy-efficient and environmentally friendly, but also have advantages such as smaller size, lower noise, lower maintenance costs, simpler operation (can be unmanned), and higher reliability, making them increasingly popular in the market.

[0003] Currently, agricultural tillers using electric tractors on the market are usually in driverless mode, operating remotely. For example, a rotary tiller with Chinese patent publication number CN 114271046 A includes: a tractor 1, a rotary tilling mechanism 2, a traction mechanism 30 connecting the tractor 1 and the rotary tilling mechanism 2, a tilting drive 6, and a support mechanism 8. However, this patented solution still has the following shortcomings:

[0004] 1. The rotary tillage mechanism 2 is fixed to the tractor 1 by the traction mechanism 30. However, the traction mechanism 30 is fastened with bolts, which is inconvenient to disassemble and assemble, and cannot quickly replace and maintain the rotary tillage mechanism 2, resulting in poor versatility.

[0005] 2. Since the cutter shaft 22 is directly driven by the rotary tiller motors 23 at both ends, the two rotary tiller motors 23 need to maintain synchronization. Otherwise, torque will be generated on the cutter shaft 22, resulting in increased internal stress. This can easily cause the cutter shaft 22 to break during tilling. Especially during the speed change of the cutter shaft 22, the two rotary tiller motors 23 usually cannot maintain synchronous speed change, causing the two ends of the cutter shaft 22 to bear different stress changes, which can easily lead to accelerated wear and reduced life. Moreover, since soil flies around when the rotary tiller is working, soil often falls into the belt drive assembly 24 that is directly connected to the cutter shaft 22 during operation, causing the transmission mechanism to jam.

[0006] 3. Due to the lack of sufficient support in the traction mechanism 30, the entire tiller will swing from side to side due to uneven ground during operation or when it is folded up, making it unable to maintain balance. If the swing amplitude is too large, it may cause the vehicle to overturn.

[0007] 4. Two traction motors 11 are used to drive the left and right track drive wheels respectively to drive the main body 10 of the vehicle. By controlling the output of the two traction motors 11, the forward, backward and turning movements of the entire main body 10 are controlled. This means that the two traction motors 11 are always working, whether the agricultural machine is moving or turning. This not only increases energy consumption and affects the battery life of the agricultural machine, but also causes the motors to overheat due to continuous operation for a long time, affecting the service life of the motors. At the same time, when the agricultural machine needs to maintain straight-line travel, it is necessary to ensure that the transmission mechanisms of the two tracks are completely synchronized, otherwise deviation will occur.

[0008] In view of the above, the inventors propose the following technical solution. Summary of the Invention:

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a small, multi-functional electric farming machine.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a small multi-functional electric tiller, comprising: a tractor, a rotary tillage mechanism, and a lifting bracket mechanism disposed at the rear end of the tractor and used for raising and lowering the rotary tillage mechanism, wherein the lifting bracket mechanism is provided with a quick-release frame for assembling and disassembling the rotary tillage mechanism; the rotary tillage mechanism includes a support connecting frame for fastening to the quick-release frame, a rotary blade motor disposed on the support connecting frame, a transmission component disposed in the middle of the support connecting frame and connected to the rotary blade motor for transmitting power, and a left rotary blade and a right rotary blade installed on both sides of the lower end of the transmission component.

[0011] Furthermore, in the above technical solution, the quick-connect frame includes an upper support rod and a lower support rod for fastening the support connecting frame, and a left connecting plate and a right connecting plate sleeved on both ends of the upper and lower support rods for pivotal connection with the lifting bracket mechanism. The upper and lower ends of both sides of the support connecting frame are respectively provided with upper fastening grooves and lower fastening grooves that can be fastened to the upper and lower support rods, and are locked and fixed to the left connecting plate and the right connecting plate by bolt groups or pins passing through the support connecting frame.

[0012] Furthermore, in the above technical solution, the transmission assembly includes a drive shaft for mounting the left and right rotary cutters, an output bevel gear set sleeved on the drive shaft, a bevel gear shaft vertically disposed on one side of the drive shaft and located between the rotary cutter motor and the output bevel gear set, and a housing covering the bevel gear shaft and the output bevel gear set. One end of the bevel gear shaft meshes with the output bevel gear set, and the other end of the bevel gear shaft is connected to the output shaft of the rotary cutter motor.

[0013] Furthermore, in the above technical solution, the lifting bracket mechanism includes four tie rod assemblies disposed between the quick-assembly frame and the tractor, a lower lifting link hinged to the quick-assembly frame, an upper lifting link hinged to the tractor and movably hinged to the lower lifting link, and a drive top rod hinged to the tractor and hinged to the upper lifting link to push it to swing. The four tie rod assemblies are respectively hinged to the four corners of the quick-assembly frame.

[0014] Furthermore, in the above technical solution, the pull rod assembly includes a support sleeve, a first and second fisheye ball head telescopically disposed at both ends of the support sleeve, a first fixing bolt rod for fixing the first fisheye ball head to the quick-connect bracket, a first and second fisheye mounting sleeve sleeved on the first fixing bolt rod and pressing against both sides of the first fisheye ball head, a first fisheye ball disposed in the end of the first fisheye ball head and used to match and engage with the first and second fisheye mounting sleeves, a second fixing screw rod for fixing the second fisheye ball head to the tractor, a third and fourth fisheye mounting sleeve sleeved on the second fixing screw rod and pressing against both sides of the second fisheye ball head, and a second fisheye ball disposed in the end of the second fisheye ball head and used to match and engage with the third and fourth fisheye mounting sleeves.

[0015] Furthermore, in the above technical solution, the tractor vehicle V includes a frame body, a left track wheel and a right track wheel disposed on both sides of the frame body, a drive module disposed within the frame body for driving the left track wheel and the right track wheel, and a battery unit disposed within the frame body for providing power to the drive module. The drive module is located at the front end of the frame body, the lifting bracket mechanism is hinged to the rear end of the frame body, and the battery unit is located in the middle of the frame body.

[0016] Furthermore, in the above technical solution, the drive module includes a transmission gearbox, a steering servo mounted on the transmission gearbox for controlling the steering of the tractor, a shift servo mounted on the transmission gearbox for controlling the forward and backward movement of the tractor, a travel motor mounted on the transmission gearbox, and a transmission pulley assembly mounted between the travel motor and the transmission gearbox.

[0017] Furthermore, in the above technical solution, the gearbox is provided with a mounting bracket for supporting the travel motor and the transmission pulley assembly. The mounting bracket includes a support plate fixed to the gearbox and a sliding block slidably disposed on the support plate for fixing the travel motor. One end of the support plate is provided with a mounting groove for the sliding block to move. The mounting groove is provided with a plurality of second strip grooves for installing and adjusting the position of the sliding block.

[0018] Furthermore, in the above technical solution, the steering servo includes a servo gearbox, a servo rotor that can swing and is disposed at the bottom of the servo gearbox, a steering motor disposed on the servo gearbox and used to drive the servo rotor to swing, and multiple sets of reduction gear pairs disposed in the servo gearbox and transmitting power between the steering motor and the servo rotor.

[0019] Furthermore, in the above technical solution, the gearbox includes a housing, an input spindle, a left output shaft, a right output shaft, a shift spindle, and a clutch spindle. The input spindle and the shift spindle are equipped with shift gear sets for transmitting power, and the clutch spindle, the left output shaft, and the right output shaft are equipped with clutch gear sets for transmitting power. The two ends of the clutch spindle are respectively equipped with a left clutch module and a right clutch module that can contact and press against the servo rotor.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] 1. This invention employs a quick-release frame between the lifting bracket mechanism and the rotary tillage mechanism to achieve rapid assembly and disassembly, thereby facilitating the replacement and maintenance of the rotary tillage mechanism and enabling quick switching between agricultural mechanisms with different functions, such as lawnmowers. Secondly, the rotary tillage mechanism utilizes a central transmission component to simultaneously transmit the power of the rotary blade motor to both the left and right rotary blades, ensuring the synchronization of the left and right rotary blades and preventing internal stress that could lead to breakage.

[0022] 2. In this invention, an upper support rod and a lower support rod are set on the quick-connect frame to achieve quick connection with the support connecting frame of the rotary tillage mechanism. The support connecting frame is connected to the left connecting plate and the right connecting plate by bolt groups or pins to achieve locking and fixing of the rotary tillage mechanism and the quick-connect frame. Attached image description:

[0023] Figure 1 This is a structural diagram of the present invention;

[0024] Figure 2 This is a structural diagram of the rotary tillage mechanism in this invention;

[0025] Figure 3 This is an internal structural diagram of the transmission component in this invention;

[0026] Figure 4 This is a structural diagram of the transmission component in this invention;

[0027] Figure 5 This is a structural diagram of the tractor unit in this invention;

[0028] Figure 6 This is a structural diagram of the lifting bracket mechanism in this invention;

[0029] Figure 7 This is an exploded view of the tie rod assembly in this invention;

[0030] Figure 8 This is a structural diagram of the drive module in this invention;

[0031] Figure 9 This is an internal structural diagram of the drive module in this invention;

[0032] Figure 10 This is a structural diagram of the steering servo in this invention. Detailed implementation method:

[0033] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0034] See Figures 1 to 10 The image shows a small, multi-functional electric tiller, comprising a tractor 1, a rotary tiller 2, and a lifting bracket mechanism 3 located at the rear of the tractor 1 for raising and lowering the rotary tiller 2. The lifting bracket mechanism 3 is equipped with a quick-release frame 4 for assembling and disassembling the rotary tiller 2. The rotary tiller 2 includes a support frame 21 for fastening to the quick-release frame 4, a rotary blade motor 22 mounted on the support frame 21, a transmission assembly 23 located in the middle of the support frame 21 and connecting to the rotary blade motor 22 for power transmission, and a left rotary blade 24 and a right rotary blade 25 mounted on both sides of the lower end of the transmission assembly 23. The quick-release frame 4 between the lifting bracket mechanism 3 and the rotary tiller 2 enables rapid assembly and disassembly, facilitating the replacement and maintenance of the rotary tiller 2 and allowing for quick replacement with agricultural mechanisms of different functions, such as a lawnmower. Secondly, the rotary tillage mechanism 2 uses the central transmission component 23 to simultaneously transmit the power of the rotary blade motor 22 to the left rotary blade 24 and the right rotary blade 25, so as to ensure the synchronization of the left rotary blade 24 and the right rotary blade 25 and avoid the generation of internal stress that could lead to breakage.

[0035] The quick-connect frame 4 includes an upper support rod 41 and a lower support rod 42 for fastening the support connecting frame 21, and a left connecting plate 43 and a right connecting plate 44 sleeved on both ends of the upper support rod 41 and the lower support rod 42 for pivotal connection with the lifting bracket mechanism 3. The upper and lower ends of both sides of the support connecting frame 21 are respectively provided with upper fastening grooves 211 and lower fastening grooves 212 that can fasten onto the upper support rod 41 and the lower support rod 42. The support connecting frame 21 is locked to the left connecting plate 43 and the right connecting plate 44 by bolts or pins. By using the upper support rod 41 and the lower support rod 42 on the quick-connect frame 4 to achieve quick fastening with the support connecting frame 21 of the rotary tillage mechanism 2, and by using bolts or pins to connect the support connecting frame 21 to the left connecting plate 43 and the right connecting plate 44, the rotary tillage mechanism 2 and the quick-connect frame 4 are locked together.

[0036] The support connecting frame 21 has a left support plate 213 and a right support plate 214 on both sides for fastening to the upper support rod 41 and the lower support rod 42, respectively. The upper fastening groove 211 and the lower fastening groove 212 are located at the upper and lower ends of the left support plate 213 and the right support plate 214, respectively. The left support plate 213 and the right support plate 214 are also provided with a first limiting mounting hole 215 and a second limiting mounting hole 216 for bolt groups or pins to pass through, and both the first limiting mounting hole 215 and the second limiting mounting hole 216 are located between the upper fastening groove 211 and the lower fastening groove 212.

[0037] The transmission assembly 23 includes a drive shaft 231 for mounting the left rotary cutter 24 and the right rotary cutter 25, an output bevel gear set 232 sleeved on the drive shaft 231, a bevel gear shaft 233 vertically disposed on one side of the drive shaft 231 and located between the rotary cutter motor 22 and the output bevel gear set 232, and a housing 234 covering the bevel gear shaft 233 and the output bevel gear set 232. One end of the bevel gear shaft 233 meshes with the output bevel gear set 232, and the other end of the bevel gear shaft 233 is connected to the output shaft of the rotary cutter motor 22.

[0038] The lifting bracket mechanism 3 includes four tie rod assemblies 31 disposed between the quick-assembly frame 4 and the tractor 1, a lower lifting link 32 hinged to the quick-assembly frame 4, an upper lifting link 33 hinged to the tractor 1 and movably hinged to the lower lifting link 32, and a drive top rod 34 hinged to the tractor 1 and hinged to the upper lifting link 33 to push it to swing. The four tie rod assemblies 31 are respectively hinged to the four corners of the quick-assembly frame 4, and the two ends of the tie rod assemblies 31 are provided with movable joints. The quick-assembly frame 4 is connected to the tractor 4 by four tie rod assemblies 31. The tractor 1 and the quick-assembly frame 4 are held together by the lower lifting link 32 and the upper lifting link 33. The upper lifting link 33 is lifted or lowered by the drive rod 34, so that the quick-assembly frame 4 is raised or lowered, thereby driving the rotary tiller 2 to flip. The four tie rod assemblies 31 provide stable support for the rotary tiller 2. After the rotary tiller 2 is raised, the distance between the rotary tiller 2 and the tractor 4 can be shortened, reducing the torque during swing and thus effectively preventing the vehicle from overturning.

[0039] The pull rod assembly 31 includes a support sleeve 31A, a first fisheye head 31B and a second fisheye head 31C telescopically disposed at both ends of the support sleeve 31A, a first fixing bolt rod 31H for fixing the first fisheye head 31B to the quick-connect bracket 4, a first fisheye mounting sleeve 31D and a second fisheye mounting sleeve 31E sleeved on the first fixing bolt rod 31H and pressing against both sides of the first fisheye head 31B, and a first fisheye mounting sleeve 31D and a second fisheye mounting sleeve 31E disposed inside the end of the first fisheye head 31B for use with the first fisheye mounting bracket 4. The first fisheye ball 31I is matched and docked with the second fisheye mounting sleeve 31D and the second fisheye mounting sleeve 31E; the second fixing screw 31J is used to fix the second fisheye ball head 31C to the tractor 1; the third fisheye mounting sleeve 31F and the fourth fisheye mounting sleeve 31G are sleeved on the second fixing screw 31J and press against both sides of the second fisheye ball head 31C; and the second fisheye ball 31K is disposed in the end of the second fisheye ball head 31C and is used to match and dock with the third fisheye mounting sleeve 31F and the fourth fisheye mounting sleeve 31G. The first fisheye head 31B has one end configured as a screw portion 31B1 that extends into the support sleeve 31A, and a first adjusting nut 31B2 for adjusting the telescopic length of the first fisheye head 31B is installed on the screw portion 31B1. The other end of the first fisheye head 31B is configured as a sleeve portion 31B3 for installing the first fisheye ball 31I and for the first fixing bolt rod 31H to pass through. The second fisheye head 31C has the same structure as the first fisheye head 31B. By using fisheye head structures at both ends of the pull rod assembly 31 for connection, the connection point at the end of the pull rod assembly 31 can be tilted within a certain angle range through the cooperation of the fisheye ball and the fisheye mounting sleeve. The extension and retraction of the pull rod assembly 31 can be achieved through the telescopic first fisheye head 31B and the second fisheye head 31C, thereby realizing the position adjustment of the rotary tillage mechanism 2 so that the rotary tillage mechanism 2 can maintain linear operation and the tillage depth is consistent at all points.

[0040] The drive rod 34 and the upper lifting link 33 are connected by a third fisheye head 351, a third fixing bolt rod 352, a fifth fisheye mounting sleeve 353, and a sixth fisheye mounting sleeve 354. The third fisheye head 351 is also provided with a third fisheye ball through which the third fixing bolt rod 352 passes and which matches and mates with the fifth fisheye mounting sleeve 353 and the sixth fisheye mounting sleeve 354. The lower lifting link 32 and the upper lifting link 33 are connected by a first pin 36. The lower lifting link 32 is provided with a first slot 321 for the first pin 36 to slide.

[0041] The tractor 1 includes a frame body A, a left track wheel B and a right track wheel C disposed on both sides of the frame body A, a drive module D disposed inside the frame body A for driving the left track wheel B and the right track wheel C, and a battery unit E disposed inside the frame body A for providing power to the drive module D. The drive module D is located at the front end of the frame body A, the lifting bracket mechanism 3 is hinged to the rear end of the frame body A, and the battery unit E is located in the middle of the frame body A.

[0042] The drive module D includes a transmission gearbox D1, a steering servo D2 mounted on the transmission gearbox D1 for controlling the steering of the tractor 1, a shift servo D3 mounted on the transmission gearbox D1 for controlling the forward and backward movement of the tractor 1, a travel motor D4 mounted on the transmission gearbox D1, and a transmission pulley set D5 mounted between the travel motor D4 and the transmission gearbox D1.

[0043] The gearbox D1 is provided with a mounting bracket D6 for supporting the travel motor D4 and the transmission pulley assembly D5. The mounting bracket D6 includes a support plate D61 fixed to the gearbox D1 and a sliding block D62 slidably disposed on the support plate D61 for fixing the travel motor D4. One end of the support plate D61 is provided with a mounting groove D63 for the sliding block D62 to move. The mounting groove D63 is provided with a plurality of second strip grooves D64 for installing and adjusting the position of the sliding block D62.

[0044] The steering servo D2 includes a servo gearbox D21, a servo rotor D22 that is oscillating and located at the bottom of the servo gearbox D21, a steering motor D23 located on the servo gearbox D21 and used to drive the servo rotor D22 to oscillate, and multiple sets of reduction gear pairs D24 located inside the servo gearbox D21 and transmitting power between the steering motor D23 and the servo rotor D22.

[0045] The gearbox D1 includes a housing, an input spindle D12, a left output shaft D13, a right output shaft D14, a transmission spindle D15, and a clutch spindle D16. The input spindle D12 and the transmission spindle D15 are equipped with transmission gear sets D17 for transmitting power. The clutch spindle D16, the left output shaft D13, and the right output shaft D14 are equipped with clutch gear sets D18 for transmitting power. The clutch spindle D16 has a left clutch module D19 and a right clutch module D100 at its two ends, which can contact and press against the servo rotor D22.

[0046] In summary, during operation, the rotary tiller 2 is driven by the tractor 1. When tilling is required, the rotary tiller 2 is lowered via the lifting bracket mechanism 3, causing the left-hand blade assembly 24 and the right-hand blade assembly 25 of the rotary tiller 2 to insert into the soil. Driven by the rotary blade motor 22, the left-hand blade assembly 24 and the right-hand blade assembly 25 begin to work, while the tractor 1 simultaneously pulls the rotary tiller 2 forward, thus achieving tilling. Furthermore, when it is necessary to replace agricultural equipment, such as a weeder, it is necessary to first use the lifting bracket mechanism 3. The bracket mechanism 3 lifts the rotary tiller 2, loosens the bolts or pins between the rotary tiller 2 and the quick-connect frame 4, and then the rotary tiller 2 is lifted upward by manual labor or an auxiliary crane and removed from the quick-connect frame 4. Of course, to facilitate the removal of the rotary tiller 2, it can also be pulled out of the soil and placed on the bottom. After removing the locking bolts or pins, the lifting bracket mechanism 3 swings downward to disengage from the rotary tiller 2. Finally, the weeder is installed on the quick-connect frame 4 to complete the replacement of the agricultural mechanism.

[0047] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A small multi-functional electric tiller, comprising a tractor (1), a rotary tillage mechanism (2), and a lifting bracket mechanism (3) disposed at the rear end of the tractor (1) for raising and lowering the rotary tillage mechanism (2), characterized in that: The lifting bracket mechanism (3) is provided with a quick-release bracket (4) for disassembling and assembling the rotary tillage mechanism (2). The rotary tillage mechanism (2) includes a support frame (21) for fastening to the fastening quick-assembly frame (4), a rotary blade motor (22) set on the support frame (21), a transmission assembly (23) set in the middle of the support frame (21) and connected to the rotary blade motor (22) to transmit power, and a left rotary blade (24) and a right rotary blade (25) installed on both sides of the lower end of the transmission assembly (23). The transmission assembly (23) includes a drive shaft (231) for mounting the left rotary cutter (24) and the right rotary cutter (25), an output bevel gear assembly (232) sleeved on the drive shaft (231), a bevel gear shaft (233) vertically disposed on one side of the drive shaft (231) and located between the rotary cutter motor (22) and the output bevel gear assembly (232), and a housing (234) covering the bevel gear shaft (233) and the output bevel gear assembly (232). One end of the bevel gear shaft (233) meshes with the output bevel gear assembly (232), and the other end of the bevel gear shaft (233) is connected to the output shaft of the rotary cutter motor (22). The tractor (1) includes a frame body (A), a left track wheel (B) and a right track wheel (C) disposed on both sides of the frame body (A), a drive module (D) disposed in the frame body (A) and used to drive the left track wheel (B) and the right track wheel (C) to work, and a battery unit (E) disposed in the frame body (A) and used to provide power to the drive module (D). The drive module (D) is located at the front end of the frame body (A), the lifting bracket mechanism (3) is hinged to the rear end of the frame body (A), and the battery unit (E) is located in the middle of the frame body (A). The drive module (D) includes a transmission gearbox (D1), a steering servo (D2) mounted on the transmission gearbox (D1) for controlling the steering of the tractor (1), a shift servo (D3) mounted on the transmission gearbox (D1) for controlling the forward and backward movement of the tractor (1), a travel motor (D4) mounted on the transmission gearbox (D1), and a transmission pulley assembly (D5) mounted between the travel motor (D4) and the transmission gearbox (D1). The steering servo (D2) includes a servo gearbox (D21), a servo rotor (D22) that is oscillating and located at the bottom of the servo gearbox (D21), a steering motor (D23) located on the servo gearbox (D21) and used to drive the servo rotor (D22) to oscillate, and multiple sets of reduction gear pairs (D24) located inside the servo gearbox (D21) and transmitting power between the steering motor (D23) and the servo rotor (D22). The lifting bracket mechanism (3) includes four tie rod assemblies (31) arranged between the quick-release frame (4) and the tractor (1), a lower lifting link (32) hinged to the quick-release frame (4), an upper lifting link (33) hinged to the tractor (1) and movably hinged to the lower lifting link (32), and a drive top rod (34) hinged to the tractor (1) and hinged to the upper lifting link (33) and pushing it to swing. The four tie rod assemblies (31) are respectively hinged to the four corners of the quick-release frame (4). The drive rod (34) is connected to the upper lifting link (33) via a third fisheye head (351), a third fixing bolt rod (352), a fifth fisheye mounting sleeve (353), and a sixth fisheye mounting sleeve (354). The third fisheye head (351) is also provided with a third fisheye ball through which the third fixing bolt rod (352) passes and which matches and engages with the fifth fisheye mounting sleeve (353) and the sixth fisheye mounting sleeve (354). The lower lifting link (32) is connected to the upper lifting link (33) via a first pin (36). The lower lifting link (32) is provided with a first slot (321) for the first pin (36) to slide.

2. The small multi-functional electric farming machine according to claim 1, characterized in that: The quick-connect frame (4) includes an upper support rod (41) and a lower support rod (42) for fastening the support connecting frame (21), and a left connecting plate (43) and a right connecting plate (44) sleeved on both ends of the upper support rod (41) and the lower support rod (42) for pivotal connection with the lifting bracket mechanism (3). The upper and lower ends of both sides of the support connecting frame (21) are respectively provided with an upper fastening groove (211) and a lower fastening groove (212) that can be fastened to the upper support rod (41) and the lower support rod (42), and are locked and fixed to the left connecting plate (43) and the right connecting plate (44) by bolt groups or pins passing through the support connecting frame (21).

3. The small multi-functional electric farming machine according to claim 1, characterized in that: The pull rod assembly (31) includes a support sleeve (31A), a first fisheye head (31B) and a second fisheye head (31C) telescopically disposed at both ends of the support sleeve (31A), a first fixing bolt rod (31H) for fixing the first fisheye head (31B) to the quick-release bracket (4), a first fisheye mounting sleeve (31D) and a second fisheye mounting sleeve (31E) sleeved on the first fixing bolt rod (31H) and pressing against both sides of the first fisheye head (31B), and a first fisheye mounting sleeve (31D) and a second fisheye mounting sleeve (31E) disposed in the end of the first fisheye head (31B) for use with the first fisheye mounting sleeve. (31D) and the first fisheye ball (31I) that matches and docks with the second fisheye mounting sleeve (31E), the second fixing screw (31J) for fixing the second fisheye ball head (31C) and the tractor (1), the third fisheye mounting sleeve (31F) and the fourth fisheye mounting sleeve (31G) that are sleeved on the second fixing screw (31J) and press against both sides of the second fisheye ball head (31C), and the second fisheye ball (31K) that is disposed in the end of the second fisheye ball head (31C) and is used to match and dock with the third fisheye mounting sleeve (31F) and the fourth fisheye mounting sleeve (31G).

4. A small multi-functional electric tiller according to claim 1, characterized in that: The gearbox (D1) is provided with a mounting bracket (D6) for supporting the travel motor (D4) and the transmission pulley assembly (D5). The mounting bracket (D6) includes a support plate (D61) fixed on the gearbox (D1) and a sliding block (D62) slidably disposed on the support plate (D61) for fixing the travel motor (D4). One end of the support plate (D61) is provided with a mounting groove (D63) for the sliding block (D62) to move. The mounting groove (D63) is provided with a plurality of second strip grooves (D64) for installing and adjusting the position of the sliding block (D62).

5. A small multi-functional electric tiller according to claim 1, characterized in that: The gearbox (D1) includes a housing, an input spindle (D12), a left output shaft (D13), a right output shaft (D14), a transmission spindle (D15), and a clutch spindle (D16). The input spindle (D12) and the transmission spindle (D15) are provided with transmission gear sets (D17) for transmitting power. The clutch spindle (D16), the left output shaft (D13), and the right output shaft (D14) are provided with clutch gear sets (D18) for transmitting power. The clutch spindle (D16) has a left clutch module (D19) and a right clutch module (D100) at both ends, which can contact and press against the servo rotor (D22).

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