Seed-metering device and seeder using same

Abstract

The utility model discloses a seed-metering device which comprises a plurality of seed-metering device core assemblies, and further comprises a rack, a seed box, a plurality of buffer boxes and a plurality of connecting pipes, and the number of the buffer boxes and the number of the connecting pipes are matched with the number of the seed-metering device core assemblies; the upper part of the rack is connected with a seed box, and the lower part of the rack is connected with a seed-metering device core assembly; the buffer box is fixed above the corresponding seed-metering device core assembly and is communicated with the seed-metering device core assembly; spherical pair joints are respectively arranged at two ends of the connecting pipe and are respectively communicated with the lower part of the seed box and the upper part of the corresponding buffer box; a pressure reduction partition plate arranged in the vertical direction is arranged in the middle of a cavity of the buffer box and divides the buffer box into a front loosening cavity and a rear compacting cavity. The size of the seed box meets the requirement for continuous cultivation of large-area plots, and the production efficiency is improved; the row spacing can be adjusted through spherical pair joints at the two ends of the connecting pipe; in addition, the decompression partition plate reduces peanut seed coat falling.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a seed metering device and a seeder using the same. Background Technology

[0002] In existing technologies, the seed box of the seed metering device is relatively small and is directly fixed to the core assembly of the seed metering device. Since the core assembly of the seed metering device is mostly made of plastic and is relatively delicate, it cannot withstand large loads, so the seed box cannot be too large. However, peanut seeds are relatively large, and when using the existing seed metering device to sow large areas, it is necessary to frequently add seeds to the seed box, which is time-consuming and labor-intensive.

[0003] Furthermore, peanuts are often considered one of the most difficult seeds to plant because their seed coat is easily detached. The seed coat, the thin membrane covering the peanut seed, is commonly known as the "peanut skin" or "peanut red coat" and is an important component of the peanut. Once the seed coat is detached, key parts of the peanut seed, such as the embryo, radicle, and plumule, may be directly exposed, making them more susceptible to damage from the external environment. This can not only lead to difficulty in germination after sowing but also cause seed rot, significantly reducing the germination rate. When using existing seed metering devices, because the seed metering wheel has not been a smooth cylindrical surface, its rotation causes only a portion of the peanut seeds located in the seed metering holes to turn upwards. Since the seeds in the seed box are relatively compacted in existing technologies, the peanut seeds are prone to detaching their seed coat when turning upwards. Utility Model Content

[0004] This invention aims to solve the problem in the prior art where seed boxes are small and the sowing area is large, requiring frequent addition of seeds to the seed boxes, which is time-consuming and labor-intensive.

[0005] This invention further solves the problem that seed metering devices in the prior art easily cause peanut seed coats to fall off.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A seed metering device includes several seed metering core assemblies. Each seed metering core assembly includes a seed metering wheel, a seed cleaning device, a transmission component, and a housing. It also includes a frame, a seed box, and several buffer boxes and connecting pipes, wherein the number of buffer boxes and connecting pipes matches the number of seed metering core assemblies.

[0008] The volume of the seed box is adapted to the seed capacity required for a large area of ​​land to be sown, and is used to provide storage space for seeds required for sowing a large area of ​​land.

[0009] The upper part of the frame is connected to a seed box, and the lower part of the frame is connected to a seed metering core assembly;

[0010] The buffer tank is fixed above and communicated with the corresponding seed-metering unit core assembly;

[0011] The connecting pipe is arranged between the seed tank and the corresponding buffer tank and communicates the seed tank and the corresponding buffer tank, and the connecting pipe comprises a first connecting pipe and a second connecting pipe, the front end of the first connecting pipe and the rear end of the second connecting pipe are sleeved, and spherical pair joints are arranged at both ends of the connecting pipe and respectively communicated with the lower part of the seed tank and the upper part of the corresponding buffer tank.

[0012] Preferably, the first connecting pipe comprises a first spherical base arranged at the rear end thereof and a first spherical fastener matched with the first spherical base, the first spherical base and the first spherical fastener are connected in spherical pair, and a first straight pipe section is arranged at the front end of the first spherical fastener;

[0013] The second connecting pipe comprises a second spherical base arranged at the front end thereof and a second spherical fastener matched with the second spherical base, the second spherical base and the second spherical fastener are connected in spherical pair, a second straight pipe section is arranged at the rear end of the second spherical fastener, a sleeve pipe with slightly larger diameter is connected at the rear end of the second straight pipe section, and the sleeve pipe is sleeved on the front end part of the first straight pipe section.

[0014] Preferably, the number of the seed-metering unit core assembly, the buffer tank and the connecting pipe is 2, and the 2 seed-metering unit core assemblies are arranged in front of and behind the lower part of the frame in staggered mode.

[0015] Preferably, the seed cleaning device is a brush wheel.

[0016] Preferably, the transmission member is a chain transmission member.

[0017] Preferably, the buffer tank is fixed on the upper part of the shell, a pressure reduction partition plate arranged in vertical direction is arranged in the middle of the cavity of the buffer tank, the upper end of the pressure reduction partition plate is connected with the upper end of the inner wall of the buffer tank, the lower end of the pressure reduction partition plate extends to the middle of the cavity of the buffer tank, and the lower end of the pressure reduction partition plate and the lower end of the inner wall of the buffer tank form a seed flow channel, the pressure reduction partition plate divides the buffer tank into a loose cavity in front and a compact cavity in back, the lower end of the loose cavity is provided with a first opening corresponding to the opening of the upper end of the shell, and the upper part of the compact cavity is provided with a second opening corresponding to the connecting pipe.

[0018] Preferably, the frame is a frame structure, comprising a horizontal part frame at the front end and a vertical part frame protruding upward at the rear end, the seed tank is arranged on the vertical part frame, and the seed-metering unit core assembly is arranged on the horizontal part frame.

[0019] Preferably, the horizontal part frame comprises a placement plate arranged in front-rear direction, the seed-metering unit core assembly is fixed on the placement plate, long circular through grooves arranged in left-right direction are arranged at the front and rear ends of the placement plate, a plurality of threaded holes are arranged on the horizontal part frame corresponding to the middle part of the through grooves, and the placement plate is fixed on the horizontal part frame through the cooperation of the through grooves and the threaded holes and the bolts.

[0020] A seeding machine comprising a traction mechanism and a second frame, the second frame being in driving connection with the traction mechanism, and further comprising the seeding device as described above, the frame of the seeding device being arranged on the second frame, the traction mechanism being used to provide traction force for the second frame to walk and rotation power for the driving member.

[0021] Preferably, the traction mechanism is a tractor.

[0022] The utility model discloses the beneficial effects of:

[0023] 1. By setting up the frame, the seed tank of larger size is placed above the frame, and the seed tank and the buffer tank are communicated through the connecting pipe, which ensures the continuity of seeding when seeding large area land, saves time and effort. In addition, the front end of the first connecting pipe and the rear end of the second connecting pipe are sleeved, the spherical pair joint is arranged at the two ends of the connecting pipe and is communicated with the lower part of the seed tank and the upper part of the corresponding buffer tank respectively, the connecting pipe can be twisted and elongated, the left and right spacing of the plurality of seeding device core assemblies is adjusted by adjusting the left and right movement of the adjusting bolt, so that the plant spacing adjustment is realized.

[0024] 2. The cavity of the buffer tank is provided with a pressure reduction partition plate arranged in the vertical direction, the pressure reduction partition plate separates the buffer tank into a loose cavity in front and a dense cavity in back, and the pressure reduction partition plate is located in front of the seeding wheel, and the upper part of the seeding wheel corresponds to the loose cavity, when the seeding wheel rotates, the seeding hole will drive the seed in its part to turn upward, and there is a certain space above the loose cavity to allow the seed to move upward, so the extrusion force between the seeds is small when the seeds above the seeding wheel turn upward, which protects the seed coat from falling off.

[0025] 3. One row corresponds to one seeding device, which is convenient for the seeding machine to adopt the floating seeding technology, that is, when the row height fluctuates, the seeding device is low with the height, which ensures the seeding depth, and the buffer tank, the connecting pipe and the seed tank on the same frame remain relatively stationary, which ensures the reliability of the connecting pipe 7 joint and avoids seed leakage. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the front view of the embodiment one of the utility model;

[0027] Figure 2 is Figure 1 the enlarged view of A in the figure;

[0028] Figure 3 is the right view of the embodiment one of the utility model;

[0029] Figure 4 is the upper view of the seeding device core assembly (hidden part of the shell) in the utility model;

[0030] Figure 5 is the left view schematic diagram of the seed metering device core assembly (hidden part of the shell) in the utility model;

[0031] Figure 6 is the right view schematic diagram of the buffer tank in the utility model;

[0032] Figure 7 is the right view schematic diagram of the connecting pipe in the utility model;

[0033] Figure 8 is the right view schematic diagram of the buffer tank in the embodiment two of the utility model;

[0034] Figure 9 is the right view schematic diagram of the cover in the embodiment two of the utility model;

[0035] The drawings are only used for example description, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment, some components of the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for the person skilled in the art, it is understandable that some well-known structures and their description in the drawings can be omitted. DETAILED DESCRIPTION

[0036] The technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model.

[0037] As shown in Figure 1 , Figure 4 A seed metering device, comprising a rack 2, a seed tank 1 is connected to the upper part of the rack 2, two seed metering device core assemblies are connected to the lower part of the rack 2, the seed metering device core assembly comprises a seed metering wheel 6, a seed cleaning device, a transmission member and a shell 3, a corresponding buffer tank 4 is communicated above the seed metering device core assembly, a connecting pipe 7 is arranged between the seed tank 1 and the corresponding buffer tank 4 and communicates the seed tank 1 and the corresponding buffer tank 4, the connecting pipe 7 comprises a first connecting pipe 71 and a second connecting pipe 72, the front end of the first connecting pipe 71 and the rear end of the second connecting pipe 72 are sleeved together, and spherical pair joints are arranged at both ends of the connecting pipe 7 and connected with the seed tank 1 and the corresponding buffer tank 4 respectively.

[0038] The number of the seed metering device core assembly, the corresponding buffer tank 4 and the connecting pipe 7 on the rack 2 is not limited to two in the Figure 1 , and can be one or three or four, and the number can be adjusted according to actual requirements.

[0039] As shown in Figure 1 , Figure 2As shown, the rack 2 is a frame structure, including a horizontal part of the rack 22 at the front end and a vertical part of the rack 21 protruding upward at the rear end, the horizontal part of the rack 22 is connected with a placing plate 23 arranged in the front-rear direction, long circular through slots 231 arranged in the left-right direction are formed at the front and rear ends of the placing plate 23, and a plurality of threaded holes are formed on the horizontal part of the rack 22 corresponding to the middle part of the through slots 231, and the placing plate 23 is fixed on the horizontal part of the rack 22 by bolts 232 penetrating through the through slots 231 and cooperating with the threaded holes.

[0040] As shown in Figure 4 , Figure 5 , the seed metering assembly includes a seed metering wheel 6, a seed cleaning device, a transmission member and a housing 3, the seed metering wheel 6 and the seed cleaning device are arranged in the housing 3 and the rotation axes of the two are arranged in parallel, the seed cleaning device is used for removing excess seeds on the seed metering wheel 6 to ensure the seed metering precision, in the embodiment, the seed cleaning device is a brush wheel 5, the transmission member is arranged on the side surface of the seed metering wheel 6 and the brush wheel 5, the transmission member is used for simultaneously transmitting the rotary power to the brush wheel 5 and the seed metering wheel 6 and rotating the brush wheel 5 and the seed metering wheel 6 in the same direction, in the embodiment, the transmission member is a chain transmission member 8, and the lower part of the housing 3 is provided with a seed metering channel.

[0041] As shown in Figure 1 , the seed tank 1 is arranged on the vertical part of the rack 21, the volume of the seed tank 1 is matched with the seed capacity required by the large-area land to be sowed, and the seed tank 1 is used for providing a storage space for the seeds required by the large-area land to be sowed.

[0042] As shown in Figure 1 , Figure 3 and Figure 7 , the connecting pipe 7 includes a first connecting pipe 71 and a second connecting pipe 72, the first connecting pipe 71 includes a first spherical base 711 arranged at the rear end thereof and a first spherical fastener 712 matched with the first spherical base 711, the first spherical base 711 and the first spherical fastener 712 are connected by a spherical pair, and the first spherical fastener 712 is provided with a first straight pipe segment 713 at the front end thereof; the second connecting pipe 72 includes a second spherical base 724 arranged at the front end thereof and a second spherical fastener 723 matched with the second spherical base 724, the second spherical base 724 and the second spherical fastener 723 are connected by a spherical pair, the second spherical fastener 723 is provided with a second straight pipe segment 722 at the rear end thereof, and the second straight pipe segment 722 is connected with a sleeve pipe 721 with a slightly larger diameter at the rear end thereof, and the sleeve pipe 721 is sleeved on the front end part of the first straight pipe segment 713.

[0043] As shown in Figure 1 , Figure 6As shown, the buffer tank 4 is fixed above and communicated with the corresponding seed sowing core assembly, a decompression partition plate 41 arranged in the vertical direction is arranged in the middle of the cavity of the buffer tank 4, and the decompression partition plate 41 is located behind the seed sowing wheel 6, the upper end of the decompression partition plate 41 is connected with the upper end of the inner wall of the buffer tank 4, the lower end of the decompression partition plate 41 extends to the middle of the cavity of the buffer tank 4, and the lower end of the decompression partition plate 41 and the lower end of the inner wall of the buffer tank 4 form a seed flow channel, the decompression partition plate 41 divides the buffer tank 4 into a loose cavity 46 in front and a dense cavity 44 in back, and the lower end of the buffer tank 4 is provided with a first opening 45 corresponding to the opening at the upper end of the shell 3, and the upper part of the dense cavity 44 is provided with a second opening 43 corresponding to the connecting pipe 7.

[0044] When the device works, there are peanut seeds below the loose cavity 46, and due to the blocking of the decompression partition plate 41, there is space above the loose cavity 46, and the dense cavity 44 is filled with peanut seeds.

[0045] The seed sowing wheel 6, the seed cleaning device, the transmission member, the shell 3 and the mutual connection relationship thereof are all prior art and are not related to the present application, and will not be described here.

[0046] The working principle of the device is as follows:

[0047] According to the land area to be sowed, sufficient peanut seeds are added in the seed tank 1, the peanut seeds enter the buffer tank 4 from the second opening 43 along the connecting pipe 7, the dense cavity 44 is filled with peanut seeds, and due to the vibration and compaction effect in the sowing process, the extrusion force between the peanut seeds in the dense cavity 44 is large.

[0048] Due to the blocking of the decompression partition plate 41, there are peanut seeds below the loose cavity 46, and there is no peanut seed above the loose cavity 46, and there is space, so the extrusion force between the seeds below the loose cavity 46 is small; the decompression partition plate is located in front of the seed sowing wheel 6, and then the seed sowing wheel 6 above corresponds to the loose cavity, and due to the space above the loose cavity, when the seed sowing wheel 6 rotates, the seed sowing hole 61 will drive part of the seeds located therein to turn upward, and the space above the loose cavity 46 allows the seeds to move upward, so the extrusion force between the seeds above the seed sowing wheel 6 is small when the seeds above the seed sowing wheel 6 turn in the space, which protects the seed coat from falling off;

[0049] When the plant spacing needs to be adjusted, the bolt 232 is loosened, the placement plate 23 is moved left and right to the appropriate position, the bolt 232 is passed through the through slot 231 and screwed into the corresponding bolt hole, and the placement plate 23 is fixed on the rack 2 by tightening the bolt 232.

[0050] Example two:

[0051] As Figure 8 , Figure 9As shown in the second embodiment, other structures are unchanged, and the difference is that the buffer tank 4 is further provided with a seed collecting channel 47 and a cover 48, the seed collecting channel 47 is arranged at the front end of the buffer tank 4 along the front-rear horizontal direction, the bottom end of the seed collecting channel 47 is flush with the bottom end of the buffer tank 4, and the longitudinal section of the seed collecting channel 47 is a groove section.

[0052] The cover 48 is an integral structure composed of the top surface and the front end surface of the buffer tank 4 in front of the second opening 43, the lower parts of the left and right end surfaces of the rear end of the cover 48 are connected with hinge seats 481, and the cover 48 is hinged with the buffer tank 4 through the hinge seats 481.

[0053] When the seeding is completed, the cover 48 is rotated to flip backward, and then the excessive seeds in the buffer tank 4 are taken out along the seed collecting channel 47.

[0054] Embodiment three:

[0055] A seeding machine comprises a traction mechanism and a second frame connected with the traction mechanism, and further comprises a plurality of seeders in the first or second embodiment, the frames 2 of the plurality of seeders are arranged side by side on the second frame, and the traction mechanism is used to provide the traction force for the walking of the second frame and the rotating power for the chain transmission member 8. In the embodiment, the traction mechanism is a tractor.

[0056] One row corresponds to one seeder, which facilitates the use of the floating seeding technology by the seeding machine, when the height of the row fluctuates, the seeder is high or low, the seeding depth is guaranteed, at the same time, the buffer tank 4, the connecting pipe 7 and the seed tank 1 on the same frame remain relatively stationary, the reliability of the connecting pipe 7 joint is guaranteed, and the seed leakage is avoided.

[0057] The floating seeding technology and the connecting mode of the frame 2 of the corresponding seeder with the second frame are all prior art, which is irrelevant to the present application, and will not be described here.

[0058] The above embodiments are only used to illustrate but not to limit the technical scheme of the present application, although the present application is described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application can still be modified or equivalently replaced without departing from the spirit and scope of the present application, any modification or partial replacement should be covered in the scope of the claims of the present application.

[0059] If the terms such as "first", "second" are used to limit the parts in the text, those skilled in the art should know that the use of "first", "second" is only for the convenience of describing the present application and simplifying the description, and the above terms have no special meaning unless otherwise stated.

[0060] In the description of the utility model, it is necessary to explain that, unless another definite provision and limit, if the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the communication, for the person skilled in the art, can understand the specific meaning of the above-mentioned terms in the utility model according to the specific circumstances.

[0061] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0062] In the description of the utility model, it is necessary to explain that, unless another definite provision and limit, the term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can be indirectly connected through the intermediate medium, can be two elements inside the communication. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

Claims

1. A seed metering device comprising a plurality of seed metering core assemblies, wherein, It also comprises a rack (2), a seed tank (1), and a plurality of buffer tanks (4) and connecting pipes (7), wherein the number of buffer tanks (4) and connecting pipes (7) matches the number of seed metering core assemblies; The upper part of the rack (2) is connected with the seed tank (1), and the lower part of the rack (2) is connected with the seed metering core assembly; The buffer tank (4) is fixed above the corresponding seed metering core assembly and is in communication therewith; The connecting pipe (7) is arranged between the seed tank (1) and the corresponding buffer tank (4) and communicates the seed tank (1) and the corresponding buffer tank (4).

2. A seed meter according to claim 1, wherein, The connecting pipe (7) comprises a first connecting pipe (71) and a second connecting pipe (72), the front end of the first connecting pipe (71) and the rear end of the second connecting pipe (72) are sleeved, and spherical pair joints are arranged at both ends of the connecting pipe (7) and are in communication with the lower part of the seed tank (1) and the upper part of the corresponding buffer tank (4), respectively.

3. A seed meter according to claim 2, wherein, The first connecting pipe (71) comprises a first spherical base (711) arranged at the rear end thereof and a first spherical fastener (712) matched with the first spherical base (711), the first spherical base (711) and the first spherical fastener (712) are connected in spherical pair, and the front end of the first spherical fastener (712) is provided with a first straight pipe section (713); The second connecting pipe (72) comprises a second spherical base (724) arranged at the front end thereof and a second spherical fastener (723) matched with the second spherical base (724), the second spherical base (724) and the second spherical fastener (723) are connected in spherical pair, the rear end of the second spherical fastener (723) is provided with a second straight pipe section (722), the rear end of the second straight pipe section (722) is connected with a sleeve pipe (721) with a slightly larger diameter, and the sleeve pipe (721) is sleeved on the front end of the first straight pipe section (713).

4. A seed meter according to claim 1 wherein, The number of the seed metering core assembly, the buffer tank (4) and the connecting pipe (7) is 2, and the two seed metering core assemblies are arranged in staggered positions at the lower part of the rack (2).

5. A seed meter according to claim 1 wherein, The seed metering core assembly comprises a seed metering wheel (6), a seed cleaning device, a transmission member and a housing (3); The seed cleaning device is a brush wheel (5), and the transmission member is a chain transmission member (8).

6. A seed meter according to claim 1 wherein, The buffer tank (4) is fixed on the upper part of the housing (3), a pressure reduction partition plate (41) arranged in the vertical direction is arranged in the middle of the cavity of the buffer tank (4), the pressure reduction partition plate (41) is located behind the seed metering wheel (6), the upper end of the pressure reduction partition plate (41) is connected with the upper end of the inner wall of the buffer tank (4), the lower end of the pressure reduction partition plate (41) extends to the middle of the cavity of the buffer tank (4), and the lower end of the pressure reduction partition plate (41) and the lower end of the inner wall of the buffer tank (4) form a seed flow channel, the pressure reduction partition plate (41) divides the buffer tank (4) into a loose cavity (46) in front and a dense cavity (44) in back, the lower end of the loose cavity (46) is provided with a first opening (45) matched with the opening at the upper end of the housing (3), and the upper part of the dense cavity (44) is provided with a second opening (43) matched with the connecting pipe (7).

7. A seed meter according to claim 6 wherein, The buffer box (4) further comprises a seed collecting channel (47) and a cover (48), the seed collecting channel (47) is arranged at the front end of the buffer box (4) along the front-rear horizontal direction, the bottom end of the seed collecting channel (47) is flush with the bottom end of the buffer box (4), and the longitudinal section of the seed collecting channel (47) is a groove-shaped section; The cover (48) is an integrated structure composed of the top surface in front of the second opening (43) of the buffer box (4) and the front end surface thereof, the lower parts of the left and right end surfaces of the rear end of the cover (48) are connected with hinged seats (481), and the cover (48) is hinged to the buffer box (4) through the hinged seats (481).

8. A seed meter according to claim 2 wherein, The frame (2) is a frame structure, comprising a horizontal part frame (22) at the front end and a vertical part frame (21) protruding upward at the rear end, the seed box (1) is arranged on the vertical part frame (21), and the seed dispenser core assembly is arranged on the horizontal part frame (22).

9. A seed meter according to claim 8 wherein, The horizontal part frame (22) comprises a placement plate (23) arranged along the front-rear direction, the seed dispenser core assembly is fixed on the placement plate (23), long circular through grooves (231) are arranged along the left-right direction at the front and rear ends of the placement plate (23), a plurality of threaded holes are arranged on the horizontal part frame (22) corresponding to the middle parts of the through grooves (231), and bolts (232) pass through the through grooves (231) and are matched with the threaded holes to fix the placement plate (23) on the horizontal part frame (22).

10. A planter comprising a tow mechanism and a second frame in driving connection with the tow mechanism, characterized in that, Further comprising a plurality of seed dispensers according to any one of claims 1-8, the corresponding frames (2) of the plurality of seed dispensers are arranged side by side on the second frame, and the traction mechanism is used for providing traction force for the walking of the second frame and rotation power of the transmission member.

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