Agricultural machinery transmission system for highland areas

Abstract

The application relates to the field of agricultural machinery transmission technology, and discloses an agricultural machinery transmission system for plateau areas, which solves the problem of the premature aging of a conveying belt caused by the influence of thermal expansion and cold contraction in the plateau areas, and comprises a conveying frame, the inner side of the conveying frame is provided with a conveying belt, the conveying belt is provided with an adjusting mechanism, the conveying frame is provided with a limiting mechanism, the lower side of the conveying frame is provided with a chassis, the chassis and the conveying frame are provided with a supporting mechanism, the adjusting mechanism comprises two horizontal rods fixed on the conveying frame in a symmetrical mode, two movable plates movably sleeved between the two horizontal rods in a symmetrical mode, and a left U-shaped frame and a right U-shaped frame fixedly connected to the top portions of the two movable plates respectively; the cooperation between the lifting plate, the driving motor, the compression spring and the lower U-shaped frame facilitates the descending of the tensioning roller, then the conveying belt is tensioned, the transportation effect is improved, and the application is suitable for use in the plateau areas.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery transmission technology, specifically a transmission system for agricultural machinery used in plateau regions. Background Technology

[0002] Mechanical transmission devices are devices that transmit kinetic energy using one or more methods such as conveyor belts, gears, chains, worm gears, and lead screws. They are core components of mechanical equipment. A conveyor belt is a device used to move objects from one place to another during the production process. It is usually made of a strip of material, mounted on a support or rollers, and driven by the power of a motor or engine.

[0003] The plateau region has a rugged terrain and a very harsh environment. The air density and pressure are low, the temperature is low, the temperature difference between day and night is large, the annual precipitation is low but there are many rainstorms, strong winds, low humidity, strong solar radiation, and a long period of permafrost. The conveyor belt is prone to premature aging due to thermal expansion and contraction, which affects the tension of the conveyor belt and results in poor transmission performance. Summary of the Invention

[0004] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides an agricultural machinery transmission system for plateau regions, which effectively solves the problem that conveyor belts are prone to premature aging due to thermal expansion and contraction in plateau regions.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an agricultural machinery transmission system for plateau regions, comprising a conveyor frame, a conveyor belt on the inner side of the conveyor frame, an adjustment mechanism on the conveyor belt, a limiting mechanism on the conveyor frame, a base frame below the conveyor frame, and a support mechanism between the base frame and the conveyor frame;

[0006] The adjustment mechanism includes two crossbars symmetrically fixed on the conveyor frame. Two movable plates are symmetrically and movably connected between the two crossbars. A left U-shaped frame and a right U-shaped frame are fixedly connected to the top of the two movable plates, respectively. A driven roller is rotatably connected to the inner side of the right U-shaped frame. A drive motor is fixedly installed on the inner side of the left U-shaped frame. A drive roller is fixedly connected to the drive motor. The end of the drive roller away from the drive motor is rotatably connected to the left U-shaped frame. The conveyor belt is connected between the drive roller and the driven roller. Multiple support rollers are rotatably connected at equal intervals on the inner side of the conveyor frame. Each support roller is in contact with the inner surface of the conveyor belt. A lower U-shaped frame is provided on the conveyor frame. A tension roller is rotatably connected to the inner side of the lower U-shaped frame. The tension roller abuts against the inner surface of the conveyor belt.

[0007] Preferably, a sleeve plate is fixedly sleeved between the two crossbars, the sleeve plate is located between the two movable plates, and 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 outside of the lower U-shaped round rod.

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

[0009] Preferably, a lifting plate located between the lower L-shaped plate and the lower U-shaped frame is movably sleeved on the outer side of the lower U-shaped rod. Two compression springs are symmetrically fixedly connected between the lifting plate and the lower U-shaped frame. Both compression springs are sleeved on the outer side of the lower U-shaped rod. Two connecting posts are symmetrically fixedly connected between the lifting plate and the screw sleeve. Both connecting posts 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 fixedly sleeved on the outer side of the guide column, a vertical plate movably sleeved inside the vertical frame, a sliding plate movably sleeved between two crossbars, and the top of the vertical plate rotatably connected to the bottom of the sliding plate.

[0011] Preferably, a guide plate is movably sleeved on the outer side of the guide column, and a drive rod is rotatably connected to the side of the guide plate near the upright frame. A sliding groove is provided on the side of the upright frame near the guide plate, and a slider is slidably connected inside the sliding groove. The slider is fixed to the outer side of the upright plate, and the end of the drive 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. Support shafts are rotatably connected to the sides of the two support plates that are close to each other. The ends of the two support shafts that are close to each other are fixed to the outer side of the crossbar. 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 inside the conveyor frame, an abutment plate fixedly installed inside the conveyor frame, the abutment plate and the limiting plate being arranged parallel to each other, and both the abutment plate and the limiting plate being located at the top of the conveyor belt, and a side U-shaped rod fixedly connected to the side of the limiting plate away from the abutment plate, the side U-shaped rod passing through the conveyor frame and being movably connected to the conveyor frame.

[0013] Preferably, a locking plate is fixedly sleeved on the outer middle of the side U-shaped rod. The top of the locking plate is provided with multiple positioning holes at equal intervals. A U-shaped plate is fixedly connected to the top of the conveyor frame. The locking plate passes through the U-shaped plate. Two inner rods are symmetrically fixedly connected between the U-shaped plate and the conveyor 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 conveyor frame. The two return springs are respectively sleeved on the outer side of the two inner rods. An insertion rod is fixedly connected to the top of the inner plate. The insertion rod is inserted into the corresponding positioning hole.

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

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention facilitates the transport of agricultural products via a conveyor belt through the cooperation between the drive motor, the active roller, the driven roller, and the tensioning roller. The cooperation between the rotary motor, the screw, the lifting plate, and the lower U-shaped rod facilitates the downward movement of the connecting column and the screw sleeve. The cooperation between the movable rod, the movable plate, and the crossbar facilitates the movement of the left and right U-shaped frames, causing the active and driven rollers to move away from each other. The cooperation between the lifting plate, the drive motor, the compression spring, and the lower U-shaped frame facilitates the descent of the tensioning roller, thereby tensioning the conveyor belt and improving transport efficiency. This invention is suitable for use in high-altitude areas.

[0017] 2. This invention facilitates the sliding of the slider within the chute through the cooperation between the cylinder and the guide plate, as well as the guide column and the drive rod. Furthermore, the cooperation between the upright frame and the upright plate, as well as the slide plate and the crossbar, facilitates the rotation of the conveyor frame. This allows for easy adjustment of the conveyor belt's tilt angle according to actual needs, thereby improving the transportation efficiency of agricultural products.

[0018] 3. This invention facilitates the movement of the limiting plate and changes its distance from the abutment plate through the cooperation between the side U-shaped rod and the conveyor frame. Furthermore, the cooperation between the inner plate, the inner rod, and the return spring facilitates the insertion of the insertion rod into the corresponding positioning hole, thereby fixing the locking plate and the U-shaped plate and fixing the position of the limiting plate. This makes it easier to limit the agricultural products transported on the conveyor belt and prevent them from falling off. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] In the attached diagram:

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

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

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

[0024] Figure 4 This is a schematic diagram of the support 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 This is a schematic diagram of the limiting mechanism structure of the present invention;

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

[0028] In the diagram: 1. Conveyor frame; 2. Adjustment mechanism; 201. Crossbar; 202. Tensioning roller; 203. Sleeve plate; 204. Lower U-shaped frame; 205. Movable plate; 206. Left U-shaped frame; 207. Drive roller; 208. Drive motor; 209. Support roller; 2010. Driven roller; 2011. Right U-shaped frame; 2012. Screw sleeve; 2013. Upper L-shaped plate; 2014. Screw; 2015. Movable rod; 2016. Lower L-shaped plate; 2017. Rotary motor; 2018. Lower U-shaped round rod; 2019. Compression spring; 2020. Lifting plate; 2021. Connecting column; 3. Support mechanism; 301. 302. Guide column; 303. Guide plate; 304. Drive rod; 305. Vertical frame; 306. Slide plate; 307. Support shaft; 308. Support plate; 309. Connecting plate; 300. Cylinder; 3010. Vertical plate; 3011. Slider; 3012. Slide groove; 4. Limiting mechanism; 401. Limiting plate; 402. Side U-shaped 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. Insert rod; 4013. Return spring; 5. Conveyor belt; 6. Base frame. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Example 1, by Figures 1-7 The present invention relates to a transmission system for agricultural machinery in plateau regions, comprising a conveyor frame 1, a conveyor belt 5 on the inner side of the conveyor frame 1, an adjustment mechanism 2 on the conveyor belt 5, a limiting mechanism 4 on the conveyor frame 1, a base frame 6 below the conveyor frame 1, and a support mechanism 3 between the base frame 6 and the conveyor frame 1.

[0031] In Embodiment 2, based on Embodiment 1, the adjusting mechanism 2 includes two crossbars 201 symmetrically fixed on the conveyor frame 1. Two movable plates 205 are symmetrically and movably sleeved between the two crossbars 201. A left U-shaped frame 206 and a right U-shaped frame 2011 are respectively fixedly connected to the top of the two movable plates 205. A driven roller 2010 is rotatably connected to the inner side of the right U-shaped frame 2011. A drive motor 208 is fixedly installed on the inner side of the left U-shaped frame 206. A drive roller 207 is fixedly connected to the drive motor 208. The end of the drive roller 207 away from the drive motor 208 is rotatably connected to the left U-shaped frame 206. The conveyor belt 5 is driven by the drive roller 2010. Between the driven roller 2010 and the driven roller 207, multiple support rollers 209 are rotatably connected at equal intervals on the inner side of the conveyor frame 1. Each support roller 209 is in contact with the inner surface of the conveyor belt 5. By setting multiple 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. A tension roller 202 is rotatably connected to the inner side of the lower U-shaped frame 204. The tension roller 202 abuts against the inner surface of the conveyor belt 5. A sleeve plate 203 is fixedly sleeved between two crossbars 201. The sleeve plate 203 is located between two movable plates 205. A lower U-shaped round rod 2018 is fixedly connected to the bottom of the sleeve plate 203. The lower U-shaped frame 204 is movably sleeved on the outside of the lower U-shaped round rod 2018. A lower L-shaped plate 2016 is fixedly installed at the bottom of the sleeve plate 203. A rotary motor 2017 is fixedly connected to the lower L-shaped plate 2016. A screw 2014 is fixedly connected to the rotary motor 2017. The screw 2014 passes through the sleeve plate 203 and is rotatably connected to it. A threaded sleeve 2012 located above the sleeve plate 203 is threaded onto the outside of the screw 2014. Two movable rods 2015 are symmetrically rotatably connected to the outside of the threaded sleeve 2012. The ends of the two movable rods 2015 away from the threaded sleeve 2012 are rotatably connected to two movable plates 205 respectively. The top of 203 is fixedly connected to an upper L-shaped plate 2013. The top of the screw 2014 is rotatably connected to 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. Two compression springs 2019 are symmetrically fixedly connected between the lifting plate 2020 and the lower U-shaped frame 204. Both compression springs 2019 are sleeved on the outer side of the lower U-shaped round rod 2018. Two connecting posts 2021 are symmetrically fixedly connected between the lifting plate 2020 and the screw sleeve 2012. Both connecting posts 2021 penetrate the sleeve plate 203 and are movably connected to the sleeve plate 203.

[0032] First, start the rotary motor 2017 to drive the screw 2014 to rotate. Since the lifting plate 2020 is movably sleeved on the outside 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. The two movable rods 2015 drive the two movable plates 205 to slide along the two crossbars 201 respectively. At the same time, the left U-shaped frame 206 and the right U-shaped frame 2011 move, so that the driving roller 207 and the driven roller 2010 move away from each other. When the driven roller 2010 slides downward along the lower U-shaped round rod 2018, the two compression springs 2019 drive the lower U-shaped frame 204 to slide downward along the lower U-shaped round rod 2018. This causes the tension roller 202 to fit tightly against the conveyor belt 5 under the elastic force of the two compression springs 2019, finally making the conveyor belt 5 tensile, improving the transportation effect, and suitable for use in high-altitude areas.

[0033] In Embodiment 3, based on Embodiment 1, the support mechanism 3 includes 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 sliding plate 305 is movably sleeved between the two crossbars 201. The top of the vertical plate 3010 is rotatably connected to the bottom of the sliding plate 305. A guide plate 302 is movably sleeved on the outer side of the guide column 301. A drive rod 303 is rotatably connected to the side of the guide plate 302 near the vertical frame 304. A groove 3012 is provided on the side of the vertical frame 304 near the guide plate 302. The slide 3012 has a sliding block 3011 inside, which is fixed to the outside of the vertical plate 3010. The end of the drive rod 303 away from the guide plate 302 is rotatably connected to the slide block 3011. Two support plates 307 are symmetrically fixedly installed on the top of the base frame 6. The two support plates 307 are rotatably connected to the side of each other. The two support shafts 306 are fixed to the outside of the crossbar 201 at the side of each other. A connecting plate 308 is fixedly installed between the two support plates 307. A cylinder 309 is fixedly installed between the connecting plate 308 and the guide plate 302.

[0034] First, the cylinder 309 is activated, causing the guide plate 302 to slide along the guide post 301. Then, the drive rod 303 drives the slider 3011 to slide in the groove 3012. At the same time, the upright plate 3010 moves vertically along the upright frame 304, while the slide plate 305 slides along the two crossbars 201. Since the two support shafts 306 fixed on the outside of the conveyor frame 1 are rotatably connected to the two support plates 307, the conveyor frame 1 is rotated. Finally, the tilt angle of the conveyor belt 5 is adjusted according to actual needs to improve the transportation efficiency of agricultural products.

[0035] In Example 4, based on Example 1, the limiting mechanism 4 includes a limiting plate 401 located inside the conveyor frame 1. An abutment plate 405 is fixedly installed inside the conveyor frame 1. The abutment plate 405 and the limiting plate 401 are arranged parallel to each other, and both the abutment plate 405 and the limiting plate 401 are located at the top of the conveyor belt 5. A side U-shaped rod 402 is fixedly connected to the side of the limiting plate 401 away from the abutment plate 405. The side U-shaped rod 402 passes through the conveyor frame 1 and is movably connected to the conveyor frame 1. A locking plate 403 is fixedly sleeved on the middle of the outer side of the side U-shaped rod 402. The top of the locking plate 403 is provided with multiple positioning holes 4011 at equal intervals. A U-shaped plate 404 is fixedly connected to the top of the conveyor frame 1, and the locking plate 403 passes through the U-shaped rod. Plate 404, U-shaped plate 404 and conveyor frame 1 are symmetrically fixedly connected by two inner rods 4010, locking plate 403 is located between the two inner rods 4010, inner plate 406 is movably sleeved between the two inner rods 4010, inner plate 406 and conveyor frame 1 are symmetrically fixedly connected by two return springs 4013, the two return springs 4013 are respectively sleeved on the outside of the two inner rods 4010, the top of inner plate 406 is fixedly connected by a plug rod 4012, the plug rod 4012 is inserted into the corresponding positioning hole 4011, the top of inner plate 406 is fixedly connected by a top frame 409, the top of U-shaped plate 404 is provided with a through groove 407, the top of top frame 409 is fixedly connected by a pressing plate 408 located in the through groove 407;

[0036] First, press down on the pressing plate 408. The top frame 409 drives the inner plate 406 to slide down along the two inner rods 4010. At this time, both return springs 4013 are compressed. Simultaneously, the insertion rod 4012 descends until it moves out of the corresponding positioning hole 4011. Then, move the locking plate 403. The side U-shaped rod 402 drives the limiting plate 401 to move. Adjust the distance between the limiting plate 401 and the abutment plate 405. Then, release the pressing plate 408. At this time, the inner plate 406 slides up along the two inner rods 4010 under the elastic force of the two return springs 4013. This drives the insertion rod 4012 to rise until it is inserted into the corresponding positioning hole 4011. The locking plate 403 and the U-shaped plate 404 are fixed, and the position of the limiting plate 401 is fixed. Finally, the agricultural products transported on the conveyor belt 5 are limited to prevent them from falling.

Claims

1. An agricultural machinery transmission system for high altitude areas comprising a conveyor frame (1) characterized in that: The inner side of the conveying frame (1) is provided with a conveying belt (5), the conveying belt (5) is provided with an adjusting mechanism (2), the conveying frame (1) is provided with a limiting mechanism (4), the lower side of the conveying frame (1) is provided with a chassis (6), and the chassis (6) and the conveying frame (1) are provided with a supporting mechanism (3); The adjusting mechanism (2) comprises two horizontal rods (201) symmetrically fixed on the conveying frame (1), two movable plates (205) symmetrically movably sleeved between the two horizontal rods (201), a left U-shaped frame (206) and a right U-shaped frame (2011) fixedly connected to the top of the two movable plates (205) respectively, a driven roller (2010) rotatably connected to the inner side of the right U-shaped frame (2011), a driving motor (208) fixedly installed on the inner side of the left U-shaped frame (206), a driving roller (207) fixedly connected to the driving motor (208), the end, away from the driving motor (208), of the driving roller (207) being rotatably connected to the left U-shaped frame (206), the conveying belt (5) being transmissionally connected between the driving roller (207) and the driven roller (2010), a plurality of supporting rollers (209) equidistantly rotatably connected to the inner side of the conveying frame (1), each supporting roller (209) being attached to the inner surface of the conveying belt (5), and a lower U-shaped frame (204) provided on the conveying frame (1) and rotatably connected with a tensioning roller (202) on the inner side of the lower U-shaped frame (204) and abutting against the inner surface of the conveying belt (5); The two horizontal rods (201) are fixedly sleeved with a sleeve plate (203), the sleeve plate (203) is located between the two movable plates (205), and the bottom of the sleeve plate (203) is fixedly connected with a lower U-shaped round rod (2018), and the lower U-shaped frame (204) is movably sleeved on the outer side of the lower U-shaped round rod (2018); The bottom of the sleeve plate (203) is fixedly installed with a lower L-shaped plate (2016), the lower L-shaped plate (2016) is fixedly connected with a rotating motor (2017), the rotating motor (2017) is fixedly connected with a screw rod (2014), the screw rod (2014) penetrates through the sleeve plate (203) and is rotatably connected with 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 with two movable rods (2015), the ends, away from the screw sleeve (2012), of the two movable rods (2015) are rotatably connected with the two movable plates (205) respectively, the top of the sleeve plate (203) is fixedly connected with an upper L-shaped plate (2013), and the top end 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) movably sleeves the lifting plate (2020) between the lower L-shaped plate (2016) and the lower U-shaped frame (204), two compression springs (2019) are symmetrically and fixedly connected between the lifting plate (2020) and the lower U-shaped frame (204), both of 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 and fixedly connected between the lifting plate (2020) and the screw sleeve (2012), both of the two connecting columns (2021) penetrate through the sleeve plate (203) and are movably connected with the sleeve plate (203).

2. The agricultural machinery transmission system for high altitude regions as claimed in claim 1 wherein: The support mechanism (3) comprises a guide column (301) fixed to the inner side of the chassis (6), a vertical frame (304) fixedly sleeved on the outer side of the guide column (301), a vertical plate (3010) movably sleeved in the vertical frame (304), a sliding plate (305) movably sleeved between the two horizontal rods (201), and the top of the vertical plate (3010) is rotatably connected with the bottom of the sliding plate (305).

3. The agricultural machinery transmission system for high altitude regions as claimed in claim 2 wherein: The outer side of the guide column (301) movably sleeves a guide plate (302), the side close to the vertical frame (304) of the guide plate (302) is rotatably connected with a driving rod (303), the side close to the guide plate (302) of the vertical frame (304) is provided with a sliding groove (3012), the inner side of the sliding groove (3012) is slidably connected with a sliding block (3011), the sliding block (3011) is fixed to the outer side of the vertical plate (3010), one end of the driving rod (303) away from the guide plate (302) is rotatably connected with the sliding block (3011), the top of the chassis (6) is symmetrically fixedly provided with two support plates (307), the sides close to each other of the two support plates (307) are rotatably connected with support shafts (306), the ends close to each other of the two support shafts (306) are fixed to the outer sides of the horizontal rods (201), and a connecting plate (308) is fixedly installed between the two support plates (307).

4. The agricultural machinery transmission system for high altitude regions as claimed in claim 1 wherein: The limiting mechanism (4) comprises a limiting plate (401) located on the inner side of the conveying frame (1), an abutting plate (405) fixedly installed on the inner side of the conveying frame (1), the abutting plate (405) and the limiting plate (401) are arranged in parallel, the abutting plate (405) and the limiting plate (401) are located on the top of the conveying 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), and the side U-shaped round rod (402) penetrates through the conveying frame (1) and is movably connected with the conveying frame (1).

5. The agricultural machinery transmission system for high altitude regions as claimed in claim 4 wherein: The outer middle part of the side U-shaped round rod (402) is fixedly sleeved with a locking plate (403), a plurality of positioning holes (4011) are equidistantly arranged on the top of the locking plate (403), the top of the conveying frame (1) is fixedly connected with a U-shaped plate (404), the locking plate (403) penetrates through the U-shaped plate (404), two inner rods (4010) are symmetrically and 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 reset springs (4013) are symmetrically and fixedly connected between the inner plate (406) and the conveying frame (1), the two reset springs (4013) are sleeved on the outer sides of the two inner rods (4010) respectively, a plug rod (4012) is fixedly connected to the top of the inner plate (406) and is inserted into the corresponding positioning hole (4011).

6. The agricultural machinery transmission system for high altitude regions as claimed in claim 5 wherein: 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 groove (407), and the top of the top frame (409) is fixedly connected with a pressing disc (408) located in the through groove (407).

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