Agricultural mechanical transmission system for plateau area

Abstract

The invention relates to the technical field of agricultural mechanical transmission, discloses an agricultural mechanical transmission system for a plateau area, and solves the problem that an existing conveying belt is prone to being affected by thermal expansion and cold contraction in the plateau area to generate the premature aging phenomenon, the agricultural mechanical transmission system comprises a conveying frame, the conveying belt is arranged on the inner side of the conveying frame, and an adjusting mechanism is arranged on the conveying belt; a limiting mechanism is arranged on the conveying frame, a bottom frame is arranged below the conveying frame, a supporting mechanism is arranged between the bottom frame and the conveying frame, the adjusting mechanism comprises two transverse rods symmetrically fixed to the conveying frame, two movable plates are symmetrically and movably connected between the two transverse rods in a sleeving mode, and the tops of the two movable plates are fixedly connected with a left U-shaped frame and a right U-shaped frame respectively; through cooperation of the lifting plate, the driving motor, the compression spring and the lower U-shaped frame, descending of the tensioning roller is facilitated, and then the conveying belt is tensioned, so that the conveying effect is improved conveniently, and the device is suitable for being used in plateau areas.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural machinery transmission, and in particular relates to an agricultural machinery transmission system for plateau areas. Background Art

[0002] A mechanical transmission device is a device that transmits kinetic energy using one or more methods such as conveyor belts, gears, chains, worm gears, screws and nuts. It is a core component in mechanical equipment. A conveyor belt is a device used to move objects from one place to another during the production process. It is usually composed of a strip of material, mounted on a bracket or roller, and driven by a motor or engine.

[0003] The plateau area has rugged terrain and a very harsh environment, with low air density and pressure, low temperature, large temperature difference between day and night, and less annual precipitation, but more rainstorms, more windy days, low humidity, strong solar radiation, and a long frozen soil period. The conveyor belt is easily affected by thermal expansion and contraction and premature aging occurs, which affects the tension of the conveyor belt and leads to poor transmission effect. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an agricultural machinery transmission system for plateau areas, which effectively solves the problem that the current conveyor belts in plateau areas are easily affected by thermal expansion and contraction and cause premature aging.

[0005] To achieve the above object, the present invention provides the following technical solution: an agricultural machinery transmission system for plateau areas, comprising a conveyor frame, a conveyor belt is provided inside the conveyor frame, an adjustment mechanism is provided on the conveyor belt, a limiting mechanism is provided on the conveyor frame, a bottom frame is provided below the conveyor frame, and a supporting mechanism is provided between the bottom frame and the conveyor frame;

[0006] The adjusting mechanism includes two cross bars symmetrically fixed on the conveying frame, two movable plates are symmetrically and movably sleeved between the two cross bars, the tops of the two movable plates are respectively fixedly connected with a left U-shaped frame and a right U-shaped frame, the inner side of the right U-shaped frame is rotatably connected with a driven roller, the inner side of the left U-shaped frame is fixedly installed with a driving motor, an active roller is fixedly connected to the driving motor, one end of the active roller away from the driving motor is rotatably connected to the left U-shaped frame, the conveyor belt is transmission-connected between the active roller and the driven roller, a plurality of supporting rollers are rotatably connected to the inner side of the conveying frame at equal distances, each supporting roller is in contact with the inner surface of the conveyor belt, a lower U-shaped frame is provided on the conveying frame, the inner side of the lower U-shaped frame is rotatably connected with a tensioning roller, and the tensioning roller is in contact with the inner surface of the conveyor belt.

[0007] Preferably, a sleeve plate is fixedly sleeved between the two cross bars, the sleeve plate is located between the two movable plates, a lower U-shaped round rod is fixedly connected to the bottom of the sleeve plate, and the lower U-shaped frame is movably sleeved on the outer side of the lower U-shaped round rod.

[0008] Preferably, a lower L-shaped plate is fixedly installed on the bottom of the sleeve plate, a rotating motor is fixedly connected to the lower L-shaped plate, a screw is fixedly connected to the rotating motor, the screw passes through the sleeve plate and is rotatably connected to the sleeve plate, the outer side of the screw is threadedly sleeved with a screw sleeve located above the sleeve plate, the outer side of the screw sleeve is symmetrically rotatably connected to two movable rods, the ends of the two movable rods away from the screw sleeve are respectively rotatably connected to the two movable plates, the top of the sleeve plate is fixedly connected to the upper L-shaped plate, and the top end of the screw is rotatably connected to the upper L-shaped plate.

[0009] Preferably, the outer side of the lower U-shaped round rod is movably sleeved with a lifting plate located between the lower L-shaped plate and the lower U-shaped frame, two compression springs are symmetrically fixedly connected between the lifting plate and the lower U-shaped frame, the two compression springs are both sleeved on the outer side of the lower U-shaped round rod, and two connecting columns are symmetrically fixedly connected between the lifting plate and the screw sleeve, and the two connecting columns both penetrate the sleeve plate and are movably connected to the sleeve plate.

[0010] Preferably, the support mechanism includes a guide column fixed to the inner side of the base frame, a vertical frame is fixedly sleeved on the outer side of the guide column, a vertical plate is movably sleeved inside the vertical frame, a slide plate is movably sleeved between the two cross bars, and the top of the vertical plate is rotatably connected to the bottom of the slide plate.

[0011] Preferably, a guide plate is movably sleeved on the outer side of the guide column, and a driving rod is rotatably connected to the side of the guide plate close to the vertical frame. A slide groove is provided on the side of the vertical frame close to the guide plate, and a slider is slidably connected inside the slide groove. The slider is fixed to the outer side of the vertical plate, and the end of the driving rod away from the guide plate is rotatably connected to the slider. Two support plates are symmetrically fixedly installed on the top of the base frame, and the two support plates are rotatably connected to support shafts on the sides close to each other, and the ends of the two support shafts close to each other are fixed to the outer side of the cross bar, a connecting plate is fixedly installed between the two support plates, and a cylinder is fixedly installed between the connecting plate and the guide plate.

[0012] Preferably, the limiting mechanism includes a limiting plate located on the inner side of the conveying frame, an abutment plate is fixedly installed on the inner side of the conveying frame, the abutment plate and the limiting plate are arranged parallel to each other, and the abutment plate and the limiting plate are both located on the top of the conveyor belt, and a side U-shaped round rod is fixedly connected to the side of the limiting plate away from the abutment plate, and the side U-shaped round rod passes through the conveying frame and is movably connected to the conveying frame.

[0013] Preferably, a locking plate is fixedly sleeved on the middle part of the outer side of the side U-shaped round rod, a plurality of positioning holes are equidistantly provided on the top of the locking plate, a U-shaped plate is fixedly connected to the top of the conveying frame, the locking plate passes through the U-shaped plate, two inner rods are symmetrically fixedly connected between the U-shaped plate and the conveying frame, the locking plate is located between the two inner rods, an inner plate is movably sleeved between the two inner rods, two return springs are symmetrically fixedly connected between the inner plate and the conveying frame, the two return springs are respectively sleeved on the outer sides of the two inner rods, an insertion rod is fixedly connected to the top of the inner plate, and the insertion rod is inserted into the corresponding positioning holes.

[0014] Preferably, the top of the inner plate is fixedly connected to a top frame, the top of the U-shaped plate is provided with a through slot, and the top of the top frame is fixedly connected to a pressing plate located in the through slot.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention facilitates the operation of the conveyor belt to transport agricultural products through the cooperation between the driving motor and the active roller and the driven roller and the tensioning roller, and facilitates the connection column to drive the screw sleeve to move downward through the cooperation between the rotating motor and the screw rod and the lifting plate and the lower U-shaped round rod, and facilitates the movement of the left U-shaped frame and the right U-shaped frame so that the active roller and the driven roller are separated from each other through the cooperation between the lifting plate and the driving motor and the compression spring and the lower U-shaped frame, so that the tensioning roller is lowered, and then the conveyor belt is tensioned, so as to improve the transportation effect, and is suitable for use in plateau areas.

[0017] 2. The invention facilitates the sliding of the slider in the slide groove through the cooperation between the cylinder and the guide plate, and the guide column and the driving rod, and facilitates the rotation of the conveyor frame through the cooperation between the vertical frame and the vertical plate, and the slide plate and the cross bar, so as to facilitate the adjustment of the inclination angle of the conveyor belt according to actual needs, which helps to improve the transportation efficiency of agricultural products.

[0018] 3. The invention facilitates the movement of the limit plate to change the distance between it and the abutment plate through the cooperation between the side U-shaped round rod and the conveying frame, and facilitates the insertion of the insertion rod into the corresponding positioning hole through the cooperation between the inner plate, the inner rod and the return spring, so that the locking plate and the U-shaped plate can be fixed, and then the position of the limit plate can be fixed, thereby facilitating the limitation of agricultural products transported on the conveyor belt to prevent them from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 This is a schematic diagram of the structure of the agricultural machinery transmission system used in plateau areas according to the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the regulating mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the sleeve structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the supporting mechanism structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the frame structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the U-shaped plate structure of the present invention.

[0028] In the figure: 1. conveying frame; 2. adjustment mechanism; 201. cross bar; 202. tensioning roller; 203. sleeve plate; 204. lower U-shaped frame; 205. movable plate; 206. left U-shaped frame; 207. active roller; 208. driving motor; 209. supporting roller; 2010. driven roller; 2011. right U-shaped frame; 2012. screw sleeve; 2013. upper L-shaped plate; 2014. screw rod; 2015. movable rod; 2016. lower L-shaped plate; 2017. rotating motor; 2018. lower U-shaped round rod; 2019. compression spring; 2020. lifting plate; 2021. connecting column; 3. supporting mechanism; 301. Guide column; 302, guide plate; 303, driving rod; 304, vertical frame; 305, slide plate; 306, support shaft; 307, support plate; 308, connecting plate; 309, cylinder; 3010, vertical plate; 3011, slider; 3012, slide groove; 4, limiting mechanism; 401, limiting plate; 402, side U-shaped round rod; 403, locking plate; 404, U-shaped plate; 405, abutment plate; 406, inner plate; 407, through groove; 408, pressing plate; 409, top frame; 4010, inner rod; 4011, positioning hole; 4012, insertion rod; 4013, reset spring; 5, conveyor belt; 6, bottom frame. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, by Figure 1-Figure 7 The present invention relates to an agricultural machinery transmission system for plateau areas, comprising a conveyor frame 1, a conveyor belt 5 is provided on the inner side of the conveyor frame 1, an adjusting mechanism 2 is provided on the conveyor belt 5, a limiting mechanism 4 is provided on the conveyor frame 1, a base frame 6 is provided below the conveyor frame 1, and a supporting mechanism 3 is provided between the base frame 6 and the conveyor frame 1.

[0031] Embodiment 2, on the basis of embodiment 1, the adjustment mechanism 2 comprises two cross bars 201 symmetrically fixed on the conveying frame 1, two movable plates 205 are symmetrically and movably sleeved between the two cross bars 201, the tops of the two movable plates 205 are respectively fixedly connected with a left U-shaped frame 206 and a right U-shaped frame 2011, the inner side of the right U-shaped frame 2011 is rotatably connected with a driven roller 2010, the inner side of the left U-shaped frame 206 is fixedly installed with a driving motor 208, the driving motor 208 is fixedly connected with an active roller 207, the end of the active roller 207 away from the driving motor 208 is rotatably connected to the left U-shaped frame 206, and the conveyor belt 5 is transmission-connected to the active roller 2 07 and the driven roller 2010, the inner side of the conveyor frame 1 is equidistantly connected to a plurality of support rollers 209, each of which is in contact with the inner surface of the conveyor belt 5. By providing a plurality of support rollers 209, the conveyor belt 5 is supported, thereby ensuring the stable operation of the conveyor belt 5. The conveyor frame 1 is provided with a lower U-shaped frame 204, the inner side of the lower U-shaped frame 204 is rotatably connected to a tensioning roller 202, and the tensioning roller 202 is in contact with the inner surface of the conveyor belt 5. A sleeve plate 203 is fixedly sleeved between the two cross bars 201, and the sleeve plate 203 is located between the two movable plates 205. The bottom of the sleeve plate 203 is fixedly connected to a lower U-shaped round rod 2018 The lower U-shaped frame 204 is movably sleeved on the outer side of the lower U-shaped round rod 2018, and a lower L-shaped plate 2016 is fixedly installed on the bottom of the sleeve plate 203. A rotating motor 2017 is fixedly connected to the lower L-shaped plate 2016, and a screw 2014 is fixedly connected to the rotating motor 2017. The screw 2014 penetrates the sleeve plate 203 and is rotatably connected to the sleeve plate 203. The outer side of the screw 2014 is threadedly sleeved with a screw sleeve 2012 located above the sleeve plate 203. The outer side of the screw sleeve 2012 is symmetrically rotatably connected to two movable rods 2015. The ends of the two movable rods 2015 away from the screw sleeve 2012 are rotatably connected to the two movable plates 205 respectively. The top of 203 is fixedly connected with an upper L-shaped plate 2013, the top of the screw rod 2014 is rotatably connected with the upper L-shaped plate 2013, the outer side of the lower U-shaped round rod 2018 is movably sleeved with a lifting plate 2020 located between the lower L-shaped plate 2016 and the lower U-shaped frame 204, and two compression springs 2019 are symmetrically fixedly connected between the lifting plate 2020 and the lower U-shaped frame 204, and the two compression springs 2019 are sleeved on the outer side of the lower U-shaped round rod 2018, and the lifting plate 2020 and the screw sleeve 2012 are symmetrically fixedly connected with two connecting columns 2021, and the two connecting columns 2021 both penetrate the sleeve plate 203 and are movably connected to the sleeve plate 203;

[0032] First, start the rotating motor 2017 to drive the screw 2014 to rotate. Since the lifting plate 2020 is movably sleeved on the outer side of the lower U-shaped round rod 2018, and the screw sleeve 2012 is connected to the lifting plate 2020 through two connecting columns 2021, the screw sleeve 2012 is driven to move downward, and the two movable plates 205 are driven to slide along the two cross bars 201 through the two movable rods 2015 respectively. At the same time, the left U-shaped frame 206 and the right U-shaped frame 2011 are moved, so that the active roller 207 and the driven roller 2010 are moved away from each other. When the driven roller 2010 slides downward along the lower U-shaped round rod 2018, the lower U-shaped frame 204 is driven to slide downward along the lower U-shaped round rod 2018 through the two compression springs 2019, so that the tensioning roller 202 is tightly fitted with the conveyor belt 5 under the action of the elastic force of the two compression springs 2019, and finally the conveyor belt 5 is tensioned to improve the transportation effect, which is suitable for use in plateau areas.

[0033] Embodiment 3, on the basis of embodiment 1, the support mechanism 3 includes a guide column 301 fixed to the inner side of the base frame 6, the outer side of the guide column 301 is fixedly sleeved with a vertical frame 304, the interior of the vertical frame 304 is movably sleeved with a vertical plate 3010, a slide plate 305 is movably sleeved between the two cross bars 201, the top of the vertical plate 3010 is rotatably connected to the bottom of the slide plate 305, the outer side of the guide column 301 is movably sleeved with a guide plate 302, the side of the guide plate 302 close to the vertical frame 304 is rotatably connected to the driving rod 303, and the side of the vertical frame 304 close to the guide plate 302 is provided with a slide groove 3012, The inside of the slide groove 3012 is slidably connected with a slider 3011, and the slider 3011 is fixed to the outside of the vertical plate 3010. The end of the driving rod 303 away from the guide plate 302 is rotatably connected to the slider 3011. Two support plates 307 are symmetrically fixedly installed on the top of the bottom frame 6. The two support plates 307 are rotatably connected to the support shaft 306 on the side close to each other. The two support shafts 306 are fixed to the outside of the cross bar 201 on the ends close to each other. A connecting plate 308 is fixedly installed between the two support plates 307, and a cylinder 309 is fixedly installed between the connecting plate 308 and the guide plate 302.

[0034] First, start the cylinder 309 to drive the guide plate 302 to slide along the guide column 301, and then drive the slider 3011 to slide in the slide groove 3012 through the driving rod 303. At the same time, the vertical plate 3010 moves vertically along the vertical frame 304, and the slide plate 305 slides along the two cross bars 201. Since the two support shafts 306 fixed on the outside of the conveying frame 1 are respectively rotated and connected to the two support plates 307, the conveying frame 1 is driven to rotate. Finally, the inclination angle of the conveyor belt 5 is adjusted according to actual needs to improve the transportation efficiency of agricultural products.

[0035] Embodiment 4, on the basis of embodiment 1, the limiting mechanism 4 includes a limiting plate 401 located on the inner side of the conveying frame 1, an abutment plate 405 is fixedly installed on the inner side of the conveying frame 1, the abutment plate 405 and the limiting plate 401 are arranged parallel to each other, and the abutment plate 405 and the limiting plate 401 are both located at the top of the conveyor belt 5, and a side U-shaped round rod 402 is fixedly connected to the side of the limiting plate 401 away from the abutment plate 405, and the side U-shaped round rod 402 passes through the conveying frame 1 and is movably connected to the conveying frame 1, and a locking plate 403 is fixedly sleeved on the middle part of the outer side of the side U-shaped round rod 402, and a plurality of positioning holes 4011 are equidistantly provided on the top of the locking plate 403, and a U-shaped plate 404 is fixedly connected to the top of the conveying frame 1, and the locking plate 403 passes through the U-shaped Plate 404, two inner rods 4010 are symmetrically fixedly connected between the U-shaped plate 404 and the conveying frame 1, the locking plate 403 is located between the two inner rods 4010, an inner plate 406 is movably sleeved between the two inner rods 4010, two return springs 4013 are symmetrically fixedly connected between the inner plate 406 and the conveying frame 1, the two return springs 4013 are respectively sleeved on the outsides of the two inner rods 4010, the top of the inner plate 406 is fixedly connected with an insertion rod 4012, the insertion rod 4012 is inserted into the corresponding positioning hole 4011, the top of the inner plate 406 is fixedly connected with a top frame 409, the top of the U-shaped plate 404 is provided with a through slot 407, and the top of the top frame 409 is fixedly connected with a pressing plate 408 located in the through slot 407;

[0036] First, press the pressing plate 408 downward, and drive the inner plate 406 to slide downward along the two inner rods 4010 through the top frame 409. At this time, the two return springs 4013 are compressed, and the insertion rod 4012 descends until it moves out of the corresponding positioning hole 4011, and then move the locking plate 403, and drive the limiting plate 401 to move through the side U-shaped round rod 402, adjust the distance between the limiting plate 401 and the abutment plate 405, and then release the pressing plate 408. At this time, the inner plate 406 slides upward along the two inner rods 4010 under the action of the elastic force of the two return springs 4013, driving the insertion rod 4012 to rise until it is inserted into the corresponding positioning hole 4011, fixing the locking plate 403 and the U-shaped plate 404, and fixing the position of the limiting plate 401, and finally limiting the agricultural products transported on the conveyor belt 5 to prevent them from falling.

Claims

1. A transmission system for agricultural machinery in plateau areas, comprising a conveyor frame (1), characterized in that: A conveyor belt (5) is provided on the inner side of the conveyor frame (1), an adjusting mechanism (2) is provided on the conveyor belt (5), a limiting mechanism (4) is provided on the conveyor frame (1), a base frame (6) is provided below the conveyor frame (1), and a supporting mechanism (3) is provided between the base frame (6) and the conveyor frame (1); The adjustment mechanism (2) comprises two cross bars (201) symmetrically fixed on the conveying frame (1); two movable plates (205) are symmetrically sleeved between the two cross bars (201); the tops of the two movable plates (205) are respectively fixedly connected to a left U-shaped frame (206) and a right U-shaped frame (2011); the inner side of the right U-shaped frame (2011) is rotatably connected to a driven roller (2010); the inner side of the left U-shaped frame (206) is fixedly installed with a driving motor (208); the driving motor (208) is fixedly connected to an active roller (207); the active roller ( The end of the conveyor belt (207) away from the driving motor (208) is rotatably connected to the left U-shaped frame (206), and the conveyor belt (5) is transmission-connected between the active roller (207) and the driven roller (2010). The inner side of the conveyor frame (1) is rotatably connected to a plurality of support rollers (209) at equal intervals, and each support roller (209) is in contact with the inner surface of the conveyor belt (5). The conveyor frame (1) is provided with a lower U-shaped frame (204), and the inner side of the lower U-shaped frame (204) is rotatably connected to a tensioning roller (202), and the tensioning roller (202) is in contact with the inner surface of the conveyor belt (5).

2. The agricultural machinery transmission system for plateau areas according to claim 1, characterized in that: A sleeve plate (203) is fixedly sleeved between the two cross bars (201), the sleeve plate (203) is located between the two movable plates (205), a lower U-shaped round rod (2018) is fixedly connected to the bottom of the sleeve plate (203), and the lower U-shaped frame (204) is movably sleeved on the outer side of the lower U-shaped round rod (2018).

3. The agricultural machinery transmission system for plateau areas according to claim 2, characterized in that: A lower L-shaped plate (2016) is fixedly mounted on the bottom of the sleeve plate (203), a rotating motor (2017) is fixedly connected to the lower L-shaped plate (2016), a screw rod (2014) is fixedly connected to the rotating motor (2017), the screw rod (2014) passes through the sleeve plate (203) and is rotatably connected to the sleeve plate (203), the outer side of the screw rod (2014) is threadedly sleeved with a screw sleeve (2012) located above the sleeve plate (203), the outer side of the screw sleeve (2012) is symmetrically rotatably connected to two movable rods (2015), the ends of the two movable rods (2015) away from the screw sleeve (2012) are rotatably connected to the two movable plates (205), the top of the sleeve plate (203) is fixedly connected to the upper L-shaped plate (2013), and the top end of the screw rod (2014) is rotatably connected to the upper L-shaped plate (2013).

4. The agricultural machinery transmission system for plateau areas according to claim 2, characterized in that: The outer side of the lower U-shaped round rod (2018) is movably sleeved with a lifting plate (2020) located between the lower L-shaped plate (2016) and the lower U-shaped frame (204); two compression springs (2019) are symmetrically fixedly connected between the lifting plate (2020) and the lower U-shaped frame (204); the two compression springs (2019) are sleeved on the outer side of the lower U-shaped round rod (2018); two connecting columns (2021) are symmetrically fixedly connected between the lifting plate (2020) and the screw sleeve (2012); the two connecting columns (2021) both penetrate the sleeve plate (203) and are movably connected to the sleeve plate (203).

5. The agricultural machinery transmission system for plateau areas according to claim 1, characterized in that: The support mechanism (3) comprises a guide column (301) fixed to the inner side of the base frame (6); a vertical frame (304) is fixedly sleeved on the outer side of the guide column (301); a vertical plate (3010) is movably sleeved inside the vertical frame (304); a slide plate (305) is movably sleeved between the two cross bars (201); and the top of the vertical plate (3010) is rotatably connected to the bottom of the slide plate (305).

6. The agricultural machinery transmission system for plateau areas according to claim 5, characterized in that: The guide column (301) is movably sleeved with a guide plate (302) on the outside, and a driving rod (303) is rotatably connected to a side of the guide plate (302) close to the vertical frame (304). A sliding groove (3012) is provided on a side of the vertical frame (304) close to the guide plate (302). A slider (3011) is slidably connected inside the sliding groove (3012). The slider (3011) is fixed to the outside of the vertical plate (3010). The end of the driving rod (303) away from the guide plate (302) is Rotatably connected to the slider (3011), two support plates (307) are symmetrically fixedly installed on the top of the bottom frame (6), and the sides of the two support plates (307) close to each other are rotatably connected to the support shaft (306), and the ends of the two support shafts (306) close to each other are fixed to the outside of the cross bar (201), a connecting plate (308) is fixedly installed between the two support plates (307), and a cylinder (309) is fixedly installed between the connecting plate (308) and the guide plate (302).

7. The agricultural machinery transmission system for plateau areas according to claim 1, characterized in that: The limiting mechanism (4) comprises a limiting plate (401) located on the inner side of the conveying frame (1); an abutting plate (405) is fixedly installed on the inner side of the conveying frame (1); the abutting plate (405) and the limiting plate (401) are arranged parallel to each other, and both the abutting plate (405) and the limiting plate (401) are located on the top of the conveyor belt (5); a side U-shaped round rod (402) is fixedly connected to the side of the limiting plate (401) away from the abutting plate (405); the side U-shaped round rod (402) passes through the conveying frame (1) and is movably connected to the conveying frame (1).

8. The agricultural machinery transmission system for plateau areas according to claim 7, characterized in that: A locking plate (403) is fixedly sleeved on the middle part of the outer side of the side U-shaped round rod (402), and a plurality of positioning holes (4011) are equidistantly arranged on the top of the locking plate (403). A U-shaped plate (404) is fixedly connected to the top of the conveying frame (1), and the locking plate (403) passes through the U-shaped plate (404). Two inner rods (4010) are symmetrically fixedly connected between the U-shaped plate (404) and the conveying frame (1), and the locking plates (403) are located between the two inner rods (4010). An inner plate (406) is movably sleeved between the two inner rods (4010), and two return springs (4013) are symmetrically fixedly connected between the inner plate (406) and the conveying frame (1). The two return springs (4013) are respectively sleeved on the outer sides of the two inner rods (4010). An insertion rod (4012) is fixedly connected to the top of the inner plate (406), and the insertion rod (4012) is inserted into the corresponding positioning hole (4011).

9. The agricultural machinery transmission system for plateau areas according to claim 8, characterized in that: The top of the inner plate (406) is fixedly connected to a top frame (409), the top of the U-shaped plate (404) is provided with a through slot (407), and the top of the top frame (409) is fixedly connected to a pressing plate (408) located in the through slot (407).

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