Small, multi-functional electric farm machine

Abstract

Disclosed is a small, multi-functional electric farm machine comprising a towing vehicle, a rotary tilling mechanism, and a lifting bracket mechanism installed at the rear end of the towing vehicle for raising and lowering the rotary tilling mechanism, wherein an engagement quick-attachment frame for attaching and detaching the rotary tilling mechanism is installed on the lifting bracket mechanism, and the rotary tilling mechanism comprises a support connection frame for engaging with the engagement quick-attachment frame, a rotary cutter motor installed on the support connection frame, a transmission assembly installed in the middle of the support connection frame and connected to the rotary cutter motor to transmit power, and a left rotary cutter and a right rotary cutter mounted on both sides of the lower end of the transmission assembly. [Effect] By installing an engagement quick-attachment frame between the lifting bracket mechanism and the rotary tilling mechanism, quick attachment and detachment are achieved, making it easier to replace and maintain the rotary tilling mechanism, and enabling quick replacement of agricultural mechanisms with different functions, such as lawnmowers.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and particularly refers to a small multi-functional electric agricultural machine.

Background Art

[0002] Currently, large agricultural tillage machines mainly consist of two parts, a locomotive and a tillage device. The locomotive generally adopts a tractor driven by a diesel internal combustion engine, and the tillage device is either mounted on the locomotive or towed by the locomotive to achieve operations in the field. With the continuous development of new energy technologies, as the power device of agricultural machinery, currently, medium and small agricultural machines on the market are gradually adopting electric tractors. Compared with conventional tractors, electric tractors not only save energy and are environmentally friendly, but also have the advantages of small size, low noise, low maintenance cost, simple operation (capable of unmanned operation), and high reliability, and are becoming increasingly popular in the market.

[0003] Currently, among agricultural machines adopting electric tractors in the market, those with an unmanned operation mode are common. The agricultural machine is operated and actuated remotely. For example, it is an agricultural rotary tiller with a Chinese Patent Registration Number of CN114271046A. This patent includes a traction locomotive 1, a rotary tillage mechanism 2, a traction mechanism 30 for connecting the traction locomotive 1 and the rotary tillage mechanism 2, a reverse drive member 6, and a support mechanism 8. However, there are the following deficiencies in the solution of this patent.

[0004] 1. The rotary tillage mechanism 2 is fixed on the traction locomotive 1 by the traction mechanism 30. However, the traction mechanism 30 uses bolts for tightening, making it difficult to attach and detach, and it is impossible to quickly replace and maintain the rotary tillage mechanism 2, so its versatility is poor.

[0005] 2. Since the cutter shaft 22 is directly driven by the rotary tilling motors 23 at both ends, it is necessary to maintain synchronization between the two rotary tilling motors 23. If this is not done, torque will be generated on the cutter shaft 22, causing an increase in internal stress and making the cutter shaft 22 prone to breakage during tilling. In particular, it is difficult to maintain synchronized speed changes between the two rotary tilling motors 23 while the cutter shaft 22 is changing speed, so both ends of the cutter shaft 22 are subjected to different stress changes, which easily leads to increased wear and a reduced service life. Furthermore, when the rotary tiller is in operation, mud is thrown up, and when the belt transmission assembly 24, which is directly linked to the cutter shaft 22, is in operation, mud often gets inside, leading to seizure of the transmission mechanism.

[0006] 3. Because the towing mechanism 30 is not adequately supported, when the entire farm machine is in motion or retracted, uneven ground can cause the rotary tilling mechanism to sway from side to side. This can make it difficult to maintain balance, and if the swaying becomes too large, it may cause the vehicle to tip over.

[0007] 4. Two traction motors 11 are used to drive the left and right crawler drive wheels respectively, thereby driving the locomotive body 10. By controlling the output of the two traction motors 11, the forward and backward movement and steering of the entire locomotive body 10 are controlled. As a result, whether the farm machine is moving forward or steering, the two traction motors 11 are always in operation, which increases energy consumption and affects the battery range of the farm machine. Furthermore, because the motors operate continuously for long periods, overheating occurs, affecting the lifespan of the motors. In addition, if it is necessary to maintain the farm machine's straight-line movement, perfect synchronization of the crawler transmission mechanisms on both sides must be ensured; otherwise, misalignment will occur.

[0008] In light of this, the inventors submit the following technical proposal. [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The objective of this invention is to overcome the shortcomings of the prior art and provide a small, multi-functional electric agricultural machine. [Means for solving the problem]

[0010] To solve the above technical problems, the present invention employs the following technical solution. A small, multi-functional electric farm machine comprising a towing vehicle, a rotary tilling mechanism, and a lifting bracket mechanism installed at the rear end of the towing vehicle for raising and lowering the rotary tilling mechanism, wherein an engagement quick-attachment frame for attaching and detaching the rotary tilling mechanism is installed on the lifting bracket mechanism, and the rotary tilling mechanism comprises a support connection frame for engaging with the engagement quick-attachment frame, a rotary cutter motor installed on the support connection frame, a transmission assembly installed in the middle of the support connection frame and connected to the rotary cutter motor to transmit power, and a left rotary cutter and a right rotary cutter attached to both sides of the lower end of the transmission assembly.

[0011] Furthermore, in the above proposed technology, the quick-attach engagement frame includes an upper support rod and a lower support rod for engaging with the support connection frame, and a left connecting plate and a right connecting plate fitted to both ends of the upper support rod and the lower support rod for pivoting to the lifting bracket mechanism. Upper and lower engagement grooves are provided at the upper and lower ends on both sides of the support connection frame, respectively, which can engage with the upper support rod and the lower support rod, and bolt sets or insertion pins are fastened and secured to the left connecting plate and the right connecting plate by passing through the support connection frame.

[0012] Furthermore, in the above proposed technology, the transmission assembly includes a drive shaft for mounting the left rotary cutter and the right rotary cutter, an output cone tooth group fitted onto the drive shaft, a cone tooth shaft installed perpendicularly to one side of the drive shaft and located between the rotary cutter motor and the output cone tooth group, and a case provided to cover the cone tooth shaft and the output cone tooth group, wherein one end of the cone tooth shaft meshes with the output cone tooth group, and the other end of the cone tooth shaft is connected to the output shaft of the rotary cutter motor.

[0013] Furthermore, in the above proposed technology, the lifting bracket mechanism includes four pull rod assemblies installed between the quick-engagement frame and the towing vehicle, a lower lifting link hinged to the quick-engagement frame, an upper lifting link hinged to the towing vehicle and movably hinged to the lower lifting link, and a drive push rod hinged to the towing vehicle and hinged to the upper lifting link, which pushes and swings it, wherein each of the four pull rod assemblies is hinged to one of the four corners of the quick-engagement frame.

[0014] Furthermore, in the above proposed technology, the pull rod assembly includes a support sleeve, a first fisheye ball joint and a second fisheye ball joint that are retractably installed at both ends of the support sleeve, a first fixing bolt screw for fixing the first fisheye ball joint to an engagement quick-set frame, a first fisheye mounting bush and a second fisheye mounting bush fitted on the first fixing bolt screw and pressed against both sides of the first fisheye ball joint, a first fisheye ball installed inside the end of the first fisheye ball joint to match and contact the first fisheye mounting bush and the second fisheye mounting bush, a second fixing screw for fixing the second fisheye ball joint to a towing vehicle, a third fisheye mounting bush and a fourth fisheye mounting bush fitted on the second fixing screw and pressed against both sides of the second fisheye ball joint, and a second fisheye ball installed inside the end of the second fisheye ball joint to match and contact the third fisheye mounting bush and the fourth fisheye mounting bush.

[0015] Furthermore, in the above proposed technology, the towing vehicle includes a chassis body, left and right crawlers installed on both sides of the chassis body, a drive module installed within the chassis body for operating the left and right crawlers, and a battery unit installed within the chassis body for supplying electrical energy to the drive module, wherein the drive module is located at the front end of the chassis body, the lifting bracket mechanism is attached to the rear end of the chassis body by hinge connection, and the battery unit is located in the middle of the chassis body.

[0016] Furthermore, in the above proposed technology, the drive module includes a variable speed gearbox, a steering control unit mounted on the variable speed gearbox for controlling the steering of the towing vehicle, a gear change steering unit mounted on the variable speed gearbox for controlling the forward and backward movement of the towing vehicle, a drive motor mounted on the variable speed gearbox, and a transmission pulley set mounted between the drive motor and the variable speed gearbox.

[0017] Furthermore, in the above proposed technology, a mounting holder for supporting the travel motor and the transmission pulley set is installed on the transmission gearbox. This mounting holder includes a support plate fixed to the transmission gearbox and a slide block slidably installed on the support plate for fixing the travel motor. A mounting groove for the movement of the slide block is provided at one end of the support plate, and a plurality of second elongated grooves are provided within the mounting groove for mounting and adjusting the position of the slide block.

[0018] Furthermore, in the above proposed technology, the steering mechanism includes a steering gearbox, a steering rotor pivotably mounted at the bottom of the steering gearbox, a steering motor mounted on the steering gearbox to drive and pivot the steering rotor, and a plurality of sets of reduction worm gears mounted inside the steering gearbox to transmit power between the steering motor and the steering rotor.

[0019] Furthermore, in the above proposed technology, the transmission gearbox includes a box body, an input main shaft, a left output shaft, a right output shaft, a transmission main shaft, and a clutch main shaft, wherein a transmission gear train for transmitting power is installed on the input main shaft and the transmission main shaft, a clutch gear train for transmitting power is installed on the clutch main shaft and the left output shaft and the right output shaft, and a left clutch module and a right clutch module are installed at both ends of the clutch main shaft, respectively, which can contact and press against the steering gear rotor. [Effects of the Invention]

[0020] By adopting the above technical proposal, the present invention has the following beneficial effects compared to the conventional technology.

[0021] 1. In this invention, by installing an engagement quick-attachment frame between the lifting bracket mechanism and the rotary tilling mechanism to enable quick attachment and detachment, the replacement and maintenance of the rotary tilling mechanism is facilitated, and quick replacement of agricultural mechanisms with different functions, such as a lawnmower, is possible. Next, the rotary tilling mechanism employs a transmission assembly in the middle to simultaneously transmit power from the rotary cutter motor to the left rotary cutter and the right rotary cutter, thereby ensuring synchronization between the left and right rotary cutters and avoiding the occurrence of breakage due to internal stress.

[0022] 2. In the present invention, an upper support rod and a lower support rod are installed on the quick-engagement frame to achieve rapid engagement with the support connection frame of the rotary tilling mechanism, and the support connection frame and the left and right connection plates are integrated by passing through them with a bolt set or insertion pin, thereby achieving tightening and fixing of the rotary tilling mechanism and the quick-engagement frame. [Brief explanation of the drawing]

[0023] [Figure 1] This is a structural diagram of the present invention. [Figure 2] This is a structural diagram of the rotary tillage mechanism in the present invention. [Figure 3] This is a diagram showing the internal structure of the transmission assembly in the present invention. [Figure 4] This is a structural diagram of the transmission assembly in the present invention. [Figure 5] This is a structural diagram of the tractor in the present invention. [Figure 6] This is a structural diagram of the lifting bracket mechanism in the present invention. [Figure 7] This is an exploded view of the pull rod assembly in the present invention. [Figure 8] This is a structural diagram of the drive module in the present invention. [Figure 9] This is an internal structural diagram of the drive module in the present invention. [Figure 10] This is a structural diagram of the steering rudder actuator in the present invention.

Embodiments for Carrying out the Invention

[0024] Hereinafter, the present invention will be further described in conjunction with specific embodiments and drawings.

[0025] As shown in Figures 1 to 10, the small, multi-functional electric farm machine includes a towing vehicle 1, a rotary tilling mechanism 2, and a lifting bracket mechanism 3 installed at the rear end of the towing vehicle 1 for raising and lowering the rotary tilling mechanism 2. An engagement quick-attachment frame 4 for attaching and detaching the rotary tilling mechanism 2 is installed on the lifting bracket mechanism 3. The rotary tilling mechanism 2 includes a support connection frame 21 for engaging with the engagement quick-attachment frame 4, a rotary cutter motor 22 installed on the support connection frame 21, a transmission assembly 23 installed in the middle of the support connection frame 21 and connected to the rotary cutter motor 22 to transmit power, and a left rotary cutter 24 and a right rotary cutter 25 attached to both sides of the lower end of the transmission assembly 23. By installing the engagement quick-attachment frame 4 between the lifting bracket mechanism 3 and the rotary tilling mechanism 2 to enable quick attachment and detachment, the replacement and maintenance of the rotary tilling mechanism 2 are made easier, and the replacement of agricultural mechanisms with different functions, such as a lawnmower, can be made quick. Next, the rotary tillage mechanism 2 employs a central transmission assembly 23 to simultaneously transmit power from the rotary cutter motor 22 to the left rotary cutter 24 and the right rotary cutter 25, thereby ensuring synchronization between the left rotary cutter 24 and the right rotary cutter 25 and avoiding the occurrence of breakage due to internal stress.

[0026] The quick-attach engagement frame 4 includes an upper support rod 41 and a lower support rod 42 for engaging with the support connection frame 21, and a left connecting plate 43 and a right connecting plate 44 fitted to both ends of the upper support rod 41 and the lower support rod 42 for pivoting to the lifting bracket mechanism 3. Upper engagement grooves 211 and lower engagement grooves 212 are provided at the upper and lower ends on both sides of the support connection frame 21, respectively, which can engage with the upper support rod 41 and the lower support rod 42, and are fastened and fixed to the left connecting plate 43 and the right connecting plate 44 by bolt sets or insertion pins that pass through the support connection frame 21. The upper support rod 41 and the lower support rod 42 are installed on the quick-attach engagement frame 4 to achieve quick engagement with the support connection frame 21 of the rotary tillage mechanism 2, and the support connection frame 21 is integrated with the left connecting plate 43 and the right connecting plate 44 by bolt sets or insertion pins that pass through, thereby achieving fastening and fixing of the rotary tillage mechanism 2 and the quick-attach engagement frame 4.

[0027] Left support plate 213 and right support plate 214 are installed on both sides of the support connecting frame 21 for engaging with the upper support rod 41 and the lower support rod 42, and the upper engagement groove 211 and lower engagement groove 212 are located at the upper and lower ends of the left support plate 213 and the right support plate 214, respectively. A first position limiting mounting hole 215 and a second position limiting mounting hole 216 are installed on the left support plate 213 and the right support plate 214, respectively for the passage of a bolt set or insertion pin, and both the first position limiting mounting hole 215 and the second position limiting mounting hole 216 are located between the upper engagement groove 211 and the lower engagement groove 212.

[0028] The transmission assembly 23 includes a drive shaft 231 for mounting the left rotary cutter 24 and the right rotary cutter 25, an output cone tooth group 232 fitted onto the drive shaft 231, a cone tooth shaft 233 installed perpendicularly to one side of the drive shaft 231 and positioned between the rotary cutter motor 22 and the output cone tooth group 232, and a case 234 covering the cone tooth shaft 233 and the output cone tooth group 232, where one end of the cone tooth shaft 233 meshes with the output cone tooth group 232 and the other end of the cone tooth shaft 233 is connected to the output shaft of the rotary cutter motor 22.

[0029] The lifting bracket mechanism 3 includes four pull rod assemblies 31 installed between the quick-engagement frame 4 and the towing vehicle 1, a lower lifting link 32 hinged and mounted on the quick-engagement frame 4, an upper lifting link 33 hinged and mounted on the towing vehicle 1 and movably hinged to the lower lifting link 32, and a drive push rod 34 hinged and mounted on the towing vehicle 1 and hinged to the upper lifting link 33, which pushes and swings it. Here, each of the four pull rod assemblies 31 is hinged to one of the four corners of the quick-engagement frame 4, and movable nodes are installed at both ends of the pull rod assemblies 31. Four pull rod assemblies 31 are used to connect and integrate the quick-attachment frame 4 and the towing vehicle 1. The towing vehicle 1 and the quick-attachment frame 4 are secured by the lifting lower link 32 and the lifting upper link 33. By pushing up or down the lifting upper link 33 with the drive push rod 34, the quick-attachment frame 4 is raised or lowered, thereby reversing the rotary tillage mechanism 2. The four pull rod assemblies 31 provide stable support to the rotary tillage mechanism 2, and after raising the rotary tillage mechanism 2, the distance between the rotary tillage mechanism 2 and the towing vehicle 1 is shortened, reducing the moment during oscillation and effectively preventing the vehicle from tipping over.

[0030] The pull rod assembly 31 includes a support sleeve 31A, a first fisheye ball joint 31B and a second fisheye ball joint 31C that are retractably installed at both ends of the support sleeve 31A, a first fixing bolt screw 31H for fixing the first fisheye ball joint 31B to the engagement quick-set frame 4, a first fisheye mounting bush 31D and a second fisheye mounting bush 31E fitted on the first fixing bolt screw 31H and pressed against both sides of the first fisheye ball joint 31B, and a first fisheye mounting bush 31 installed inside the end of the first fisheye ball joint 31B It includes a first fisheye ball 31I for matching and contacting D and a second fisheye mounting bush 31E, a second fixing screw 31J for fixing the second fisheye ball joint 31C to the towing vehicle 1, a third fisheye mounting bush 31F and a fourth fisheye mounting bush 31G fitted on the second fixing screw 31J and pressed against both sides of the second fisheye ball joint 31C, and a second fisheye ball 31K installed within the end of the second fisheye ball joint 31C for matching and contacting the third fisheye mounting bush 31F and the fourth fisheye mounting bush 31G. Here, one end of the first fisheye ball joint 31B is installed as a screw portion 31B1 that is inserted into the support sleeve 31A, and a first adjustment nut 31B2 for adjusting the extension and retraction length of the first fisheye ball joint 31B is attached to the screw portion 31B1, and the other end of the first fisheye ball joint 31B is installed as a sleeve portion 31B3 for attaching the first fisheye ball 31I and for the passage of the first fixing bolt screw 31H, and the structure of the second fisheye ball joint 31C and the first fisheye ball joint 31B are the same.Fisheye ball joint structures are installed at both ends of the pull rod assembly 31 for connection, and the fitting of the fisheye ball and the fisheye mounting bush allows the connection point at the end of the pull rod assembly 31 to swing within a certain angular range. By extending and shortening the pull rod assembly 31 using the extendable first fisheye ball joint 31B and the second fisheye ball joint 31C, the position of the pull rod assembly 31 can be adjusted relative to the rotary tillage mechanism 2, allowing the rotary tillage mechanism 2 to maintain linear operation and ensuring that the tillage depth at each point is consistent.

[0031] The drive push rod 34 and the lifting upper link 33 are connected via a third fisheye ball joint 351, a third fixing bolt screw 352, a fifth fisheye mounting bush 353, and a sixth fisheye mounting bush 354. A third fisheye ball is also installed within the third fisheye ball joint 3351, which is for the third fixing bolt screw 352 to pass through and which matches and contacts the fifth fisheye mounting bush 353 and the sixth fisheye mounting bush 354. The lifting lower link 32 and the lifting upper link 33 are connected via a first pin shaft 36, and a first elongated groove 321 is provided on the lifting lower link 32 for the sliding of the first pin shaft 36.

[0032] The towing vehicle 1 includes a chassis body A, a left crawler B and a right crawler C installed on both sides of the chassis body A, a drive module D installed inside the chassis body A for operating the left crawler B and the right crawler C, and a battery unit E installed inside the chassis body A for supplying electrical energy to the drive module D, wherein the drive module D is located at the front end of the chassis body A, the lifting bracket mechanism 3 is attached to the rear end of the chassis body A by hinge connection, and the battery unit E is located in the middle of the chassis body A.

[0033] The drive module D includes a variable speed gearbox D1, a steering control D2 installed on the variable speed gearbox D1 for controlling the steering of the towing vehicle 1, a gear change steering control D3 installed on the variable speed gearbox D1 for controlling the forward and backward movement of the towing vehicle 1, a travel motor D4 installed on the variable speed gearbox D1, and a transmission pulley set D5 installed between the travel motor D4 and the variable speed gearbox D1.

[0034] A mounting holder D6 for supporting the travel motor D4 and the transmission pulley set D5 is installed on the transmission gearbox D1. This mounting holder D6 includes a support plate D61 fixed to the transmission gearbox D1 and a slide block D62 slidably installed on the support plate D61 for fixing the travel motor D4. A mounting groove D63 for the movement of the slide block D62 is provided at one end of the support plate D61, and a plurality of second elongated grooves D64 for mounting and adjusting the position of the slide block D62 are provided within the mounting groove D63.

[0035] The steering mechanism D2 includes a steering gearbox D21, a steering rotor D22 pivotably mounted at the bottom of the steering gearbox D21, a steering motor D23 mounted on the steering gearbox D21 to drive and pivot the steering rotor D22, and a plurality of sets of reduction worm gear pairs D24 mounted inside the steering gearbox D21 to transmit power between the steering motor D23 and the steering rotor D22.

[0036] The aforementioned transmission gearbox D1 includes a box body, an input main shaft D12, a left output shaft D13, a right output shaft D14, a transmission main shaft D15, and a clutch main shaft D16. A transmission gear train D17 for transmitting power on the input main shaft D12 and the transmission main shaft D15 is installed, and a clutch gear train D18 for transmitting power on the clutch main shaft D16, the left output shaft D13, and the right output shaft D14 is installed. A left clutch module D19 and a right clutch module D100 are installed at both ends of the clutch main shaft D16, respectively, so as to contact and press against the steering gear rotor D22.

[0037] In summary, when the present invention is in operation, the rotary tillage mechanism 2 is driven by the towing vehicle 1. When it is necessary to till the fields, the rotary tillage mechanism 2 is lowered by the lifting bracket mechanism 3, the left rotary cutter set 24 and the right rotary cutter set 25 of the rotary tillage mechanism 2 are inserted underground, and as the left rotary cutter set 24 and the right rotary cutter set 25 begin to operate under the drive of the rotary cutter motor 22, the rotary tillage mechanism 2 is pulled forward by the towing vehicle 1, thereby achieving tillage. Furthermore, if it is necessary to replace an agricultural mechanism, such as a weeding machine, the rotary tilling mechanism 2 must first be raised using the lifting bracket mechanism 3, the bolts or insertion pins between the rotary tilling mechanism 2 and the quick-attachment frame 4 must be loosened, and then the rotary tilling mechanism 2 must be raised upwards by hand or with an auxiliary crane and removed from the quick-attachment frame 4. Of course, to facilitate the removal of the rotary tilling mechanism 2, it may also be possible to remove the rotary tilling mechanism 2 by pulling it out of the ground, placing it on the ground, removing the tightening bolts or insertion pins, and then swinging the lifting bracket mechanism 3 downwards to remove the rotary tilling mechanism 2. Finally, the weeding machine is attached to the quick-attachment frame 4 to complete the replacement of the agricultural mechanism.

[0038] Of course, the above description is merely a specific example of the present invention and does not limit the scope of implementation. Any equivalent modifications or alterations made based on the structure, features and principles described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A small, multi-functional electric farm machine comprising a towing vehicle (1), a rotary tilling mechanism (2), and a lifting bracket mechanism (3) installed at the rear end of the towing vehicle (1) for raising and lowering the rotary tilling mechanism (2), An engagement quick-attachment frame (4) for attaching and detaching the rotary tilling mechanism (2) is installed on the lifting bracket mechanism (3). The rotary tilling mechanism (2) is a small, multi-functional electric farm machine characterized by including a support connecting frame (21) for engaging with a quick-attachment engagement frame (4), a rotary cutter motor (22) installed on the support connecting frame (21), a transmission assembly (23) installed in the middle of the support connecting frame (21) and connected to the rotary cutter motor (22) to transmit power, and a left rotary cutter (24) and a right rotary cutter (25) attached to both sides of the lower end of the transmission assembly (23).

2. The small, multi-functional electric farm machine according to claim 1, characterized in that the engagement quick-attachment frame (4) includes an upper support rod (41) and a lower support rod (42) for engaging with the support connection frame (21), and a left connecting plate (43) and a right connecting plate (44) fitted to both ends of the upper support rod (41) and the lower support rod (42) and pivotally attached to the lifting bracket mechanism (3), and upper engagement grooves (211) and lower engagement grooves (212) that can engage with the upper support rod (41) and the lower support rod (42) are provided at the upper and lower ends on both sides of the support connection frame (21), and the left connecting plate (43) and the right connecting plate (44) are fastened and fixed by bolt sets or insertion pins that pass through the support connection frame (21).

3. The transmission assembly (23) includes a drive shaft (231) for mounting a left rotary cutter (24) and a right rotary cutter (25), an output cone tooth group (232) fitted onto the drive shaft (231), a cone tooth shaft (233) installed perpendicularly to one side of the drive shaft (231) and located between the rotary cutter motor (22) and the output cone tooth group (232), and a case (234) provided to cover the cone tooth shaft (233) and the output cone tooth group (232), wherein one end of the cone tooth shaft (233) meshes with the output cone tooth group (232), and the other end of the cone tooth shaft (233) is connected to the output shaft of the rotary cutter motor (22), characterized in that the small multi-functional electric farm machine is as described in claim 1.

4. The lifting bracket mechanism (3) includes four pull rod assemblies (31) installed between a quick-engagement frame (4) and a towing vehicle (1), a lower lifting link (32) hinged and mounted on the quick-engagement frame (4), an upper lifting link (33) hinged and mounted on the towing vehicle (1) and movably hinged to the lower lifting link (32), and a drive push rod (34) hinged and mounted on the towing vehicle (1) and hinged to the upper lifting link (33) for pushing and swinging it, wherein the four pull rod assemblies (31) are each hinged to one of the four corners of the quick-engagement frame (4), characterized in that the small, multi-functional electric farm machine is as described in claim 1.

5. The pull rod assembly (31) includes a support sleeve (31A), a first fisheye ball joint (31B) and a second fisheye ball joint (31C) that are retractably installed at both ends of the support sleeve (31A), a first fixing bolt screw (31H) for fixing the first fisheye ball joint (31B) to the engagement quick-set frame (4), a first fisheye mounting bush (31D) and a second fisheye mounting bush (31E) fitted on the first fixing bolt screw (31H) and pressed against both sides of the first fisheye ball joint (31B), and the first fisheye mounting bush (31D) and the second fisheye mounting bush installed within the end of the first fisheye ball joint (31B) A small, multi-functional electric farm machine according to claim 4, comprising: a first fisheye ball (31I) for matching and contacting a bush (31E); a second fixing screw (31J) for fixing a second fisheye ball joint (31C) to a towing vehicle (1); a third fisheye mounting bush (31F) and a fourth fisheye mounting bush (31G) fitted on the second fixing screw (31J) and pressed against both sides of the second fisheye ball joint (31C); and a second fisheye ball (31K) installed within the end of the second fisheye ball joint (31C) for matching and contacting the third fisheye mounting bush (31F) and the fourth fisheye mounting bush (31G).

6. The towing vehicle (1) includes a chassis body (A), a left crawler (B) and a right crawler (C) installed on both sides of the chassis body (A), a drive module (D) installed inside the chassis body (A) for operating the left crawler (B) and the right crawler (C), and a battery unit (E) installed inside the chassis body (A) for supplying electrical energy to the drive module (D), wherein the drive module (D) is located at the front end of the chassis body (A), the lifting bracket mechanism (3) is attached to the rear end of the chassis body (A) by hinge connection, and the battery unit (E) is located in the middle of the chassis body (A), characterized in that the small multi-functional electric farm machine is as described in any one of claims 1 to 5.

7. The small, multi-functional electric farm machine according to claim 6, characterized in that the drive module (D) includes a variable speed gearbox (D1), a steering control (D2) mounted on the variable speed gearbox (D1) for controlling the steering of the towing vehicle (1), a gear change steering (D3) mounted on the variable speed gearbox (D1) for controlling the forward and backward movement of the towing vehicle (1), a travel motor (D4) mounted on the variable speed gearbox (D1), and a transmission pulley set (D5) mounted between the travel motor (D4) and the variable speed gearbox (D1).

8. A small, multi-functional electric farm machine according to claim 7, characterized in that a mounting holder (D6) for supporting a travel motor (D4) and a transmission pulley set (D5) is installed on the speed-shifting gearbox (D1), and the mounting holder (D6) includes a support plate (D61) fixed on the speed-shifting gearbox (D1) and a slide block (D62) slidably installed on the support plate (D61) for fixing the travel motor (D4), and a mounting groove (D63) for the movement of the slide block (D62) is provided at one end of the support plate (D61), and a plurality of second elongated grooves (D64) for mounting and adjusting the position of the slide block (D62) are provided in the mounting groove (D63).

9. The small, multi-functional electric farm machine according to claim 7, characterized in that the steering steering mechanism (D2) includes a steering gearbox (D21), a steering rotor (D22) pivotably mounted at the bottom of the steering gearbox (D21), a steering motor (D23) mounted on the steering gearbox (D21) to drive and pivot the steering rotor (D22), and a plurality of sets of reduction worm gear pairs (D24) mounted inside the steering gearbox (D21) to transmit power between the steering motor (D23) and the steering rotor (D22).

10. The small, multi-functional electric farm machine according to claim 9, wherein the transmission gearbox (D1) includes a box body, an input main shaft (D12), a left output shaft (D13), a right output shaft (D14), a transmission main shaft (D15), and a clutch main shaft (D16), wherein a transmission gear train (D17) for transmitting power is installed on the input main shaft (D12) and the transmission main shaft (D15), and a clutch gear train (D18) for transmitting power is installed on the clutch main shaft (D16), the left output shaft (D13), and the right output shaft (D14), and a left clutch module (D19) and a right clutch module (D100) are installed at both ends of the clutch main shaft (D16), respectively, so as to be able to contact and press against the steering rotor (D22).

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