Incomplete gear transmission variable cavity fertilizer apparatus

Abstract

The utility model discloses an incomplete gear transmission variable cavity fertilizer apparatus, relates to the technical field of agricultural machinery, and solves the problem of non-uniform fertilizer discharge in the prior art. The quantitative fertilizer box comprises a quantitative fertilizer cavity, openings for feeding and discharging fertilizer are formed in the upper end and the lower end of the quantitative fertilizer cavity respectively, the side wall of the quantitative fertilizer cavity is communicated with a box body, a fertilizer amount adjusting assembly is adjustably arranged between the box body and the quantitative fertilizer cavity, and an upper sliding cover and a lower sliding cover are arranged on the upper side and the lower side of the box body in parallel respectively. The upper sliding cover and the lower sliding cover are in transmission connection with a pair of opening and closing mechanisms arranged on the box body, a power shaft is arranged on the box body, and the opening and closing mechanisms are connected with the power shaft through incomplete gear transmission mechanisms. The power shaft can control the upper sliding cover and the lower sliding cover to close or open the openings in the upper end and the lower end of the quantitative fertilizer cavity through the incomplete gear transmission mechanism and the opening and closing mechanism. According to the fertilizer apparatus, the straight-through discharging quantitative fertilizer cavity is matched with the upper sliding cover and the lower sliding cover for discharging, a grooved wheel discharging mode in the prior art is replaced, the uniformity of fertilizer application can be improved, and quantitative control and accurate fertilizer application are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to an incomplete gear transmission variable cavity fertilizer discharger. Background Art

[0002] As human demand for food continues to increase, crop fertilizer application has become an important means for many countries to increase food production. Reasonable fertilizer application can increase food production and improve farmers' income. Therefore, how to adjust and control the amount of fertilizer application and how to improve the uniformity and utilization efficiency of fertilizer application have attracted more and more attention.

[0003] In the process of fertilizing crops, traditional external groove wheel fertilizer spreaders often get clogged by fertilizer accumulation, which affects the normal operation of the fertilizer spreader. The fertilizer discharge amount is generally controlled by adjusting the speed of the fertilizer spreader, which leads to periodic pulsation of the fertilizer flow. The fertilizer amount adjustment is not accurate, clear, and convenient. For other variable cavity fertilizer spreaders on the market, there are problems such as unreliable transmission and easy failure.

[0004] For example, the Chinese invention patent with publication number CN110122017B discloses a fertilizer dispensing device, including: a fertilizer dispensing box, a fertilizer dispensing groove wheel, a fertilizer dispensing tongue, and a fertilizer dispensing tongue adjusting device. The fertilizer dispensing groove wheel is horizontally installed inside the fertilizer dispensing box, the fertilizer dispensing tongue is installed inside the fertilizer dispensing box and below the fertilizer dispensing groove wheel, and is connected to the fertilizer dispensing tongue adjusting device, and the fertilizer dispensing tongue adjusting device is installed outside the fertilizer dispensing box; the top of the fertilizer dispensing box is provided with a fertilizer inlet, and the bottom of the fertilizer dispensing box is provided with a fertilizer outlet. The invention effectively improves the patency of fertilizer dispensing and reduces the blockage of fertilizer pipes; the closed fertilizer dispensing device can block moisture in the air from entering the fertilizer box, prevent fertilizer from deliquescing due to absorbing moisture in the air, and prevent fertilizer from adhering to the fertilizer dispensing groove wheel to avoid interfering with the fertilizer dispensing amount or blocking the fertilizer dispensing pipe.

[0005] However, in this invention, the outer groove wheel and speed control are also used for quantitative fertilizer discharge, and the problem of uneven fertilizer discharge existing in the prior art also exists. In view of the above situation and problems, it is necessary to design a fertilizer discharger with accurate and convenient fertilizer adjustment and reliable transmission. Utility Model Content

[0006] In view of the deficiencies in the above-mentioned background technology, the utility model proposes an incomplete gear transmission variable cavity fertilizer discharger, which solves the problem of uneven fertilizer discharge in the prior art.

[0007] The technical solution of the utility model is achieved as follows: an incomplete gear transmission variable cavity fertilizer discharger comprises a quantitative fertilizer cavity, wherein the upper and lower ends of the quantitative fertilizer cavity are respectively provided with openings for feeding and discharging fertilizer, the side wall of the quantitative fertilizer cavity is communicated with a box body, a fertilizer amount adjustment component is adjustable between the box body and the quantitative fertilizer cavity, an upper sliding cover and a lower sliding cover are respectively provided in parallel on the upper and lower sides of the box body, and the upper sliding cover and the lower sliding cover are respectively connected to a pair of opening and closing mechanisms arranged on the box body, a power shaft is provided on the box body, the opening and closing mechanism is connected to the power shaft through an incomplete gear transmission mechanism, and the power shaft can control the upper sliding cover and the lower sliding cover through the incomplete gear transmission mechanism and the opening and closing mechanism to close or open the openings at the upper and lower ends of the quantitative fertilizer cavity.

[0008] Preferably, the incomplete gear transmission mechanism includes an incomplete bevel gear coaxially fixed with the power shaft, and the incomplete bevel gear is provided with a bevel tooth section and a toothless section; a pair of gear shafts are vertically symmetrically rotated on the box body, and bevel gears are provided on the gear shafts, and the bevel tooth sections can alternately mesh with the upper and lower bevel gears when the incomplete bevel gear rotates.

[0009] Preferably, the power shaft is provided with a fixed disc seat, the fixed disc seat is provided with an arc-shaped boss, and the arc-shaped boss is arranged corresponding to the toothless section; a positioning disc is fixedly provided on the gear shaft, and the positioning disc is provided with a tangent plane matching the arc-shaped boss.

[0010] Furthermore, the box body is provided with a shaft end pressure cover and a transparent cover which cooperate with the power shaft.

[0011] Preferably, the opening and closing mechanism comprises a crank with one end fixed to the end of the gear shaft, and a copper ring slider is provided at the other end of the crank.

[0012] Preferably, the upper sliding cover and the lower sliding cover are both transversely provided with track sliding holes, and the copper ring sliders are slidably arranged in the track sliding holes.

[0013] Preferably, the side wall of the box body is provided with a slide groove, and the upper slide cover and the lower slide cover are both provided with long slide rails for slidingly cooperating with the slide groove; the upper slide cover and the lower slide cover are both connected with a fertilizer discharge tongue, and the matching ends of the box body and the quantitative fertilizer cavity are provided with through holes corresponding to the upper and lower ends for the fertilizer discharge tongue to pass through, and the box body is provided with an opening between the two through holes for the fertilizer amount adjustment component to extend out.

[0014] Preferably, the quantitative fertilizer cavity is a U-shaped trough body, and the open end of the U-shaped trough body is connected to the box body by bolts.

[0015] Preferably, the fertilizer amount adjustment component includes an adjustment block slidably arranged on the box body, the adjustment block is fixedly connected to the sliding shaft, a long waist hole is horizontally arranged on the box body, and the end of the sliding shaft is slidably arranged on the long waist hole.

[0016] Preferably, a scale is provided on the box body, and a pointer cooperating with the scale is provided at the end of the sliding shaft.

[0017] The beneficial effects of the utility model are as follows: by controlling the upper sliding cover and the lower sliding cover to slide back and forth in sequence by using the opening and closing mechanism during the fertilizer discharge process, the opening and closing of the upper and lower openings of the quantitative fertilizer cavity are controlled, so that the fertilizer is automatically loaded and discharged at a uniform speed and the process is controllable; by setting an incomplete gear transmission mechanism, the power of the power shaft can be transmitted to the opening and closing mechanism, thereby realizing flexible control of the alternating opening and closing of the upper sliding cover and the lower sliding cover; by setting a fertilizer amount adjustment component, the capacity of the quantitative fertilizer cavity corresponding to the area between the upper sliding cover and the lower sliding cover can be adjusted, thereby accurately controlling the amount of fertilizer discharged. The fertilizer discharger uses a quantitative fertilizer cavity with direct discharge to cooperate with the upper sliding cover and the lower sliding cover for discharge, replacing the groove wheel discharge method in the prior art, which can improve the uniformity of fertilization, realize quantitative control, and accurate fertilization, while also effectively avoiding the problem of fertilizer discharge blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the use state of the utility model;

[0020] Figure 2 This is a schematic diagram of the external structure of the fertilizer dispenser of the utility model;

[0021] Figure 3 This is a schematic diagram of the box structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the incomplete gear transmission mechanism and the opening and closing mechanism of the utility model;

[0023] Figure 5 It is an exploded schematic diagram of the incomplete gear transmission mechanism and the opening and closing mechanism of the utility model;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] In the figure: 1: quantitative fertilizer cavity, 2: box body, 3: fertilizer amount adjustment component, 4: upper sliding cover, 5: lower sliding cover, 6: opening and closing mechanism, 7: power shaft, 8: incomplete gear transmission mechanism, 9: incomplete bevel gear, 10: bevel gear segment, 11: gear shaft, 12: bevel gear, 13: fixed disc seat, 14: arc boss, 15: positioning disc, 16: cutting plane, 17: shaft end pressure cover, 18: transparent cover, 19: crank, 20: copper ring slider, 21: track slide hole, 22: fertilizer discharge tongue, 23: through hole, 24: slide groove, 25: long slide rail, 26: scale, 27: pointer, 28: fertilizer box, 29: fertilizer delivery pipe, 30: long waist hole, 31: process hole, 32: collar, 33 slide shaft, 34: adjustment block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1 , 2 As shown, in embodiment 1, an incomplete gear transmission modified cavity fertilizer discharger comprises a quantitative fertilizer cavity 1, and the upper and lower ends of the quantitative fertilizer cavity 1 are respectively provided with openings for feeding and discharging fertilizer. In this embodiment, the upper end opening of the quantitative fertilizer cavity 1 is connected to the fertilizer box 28, and the lower end opening is connected to the fertilizer delivery pipe 29. The fertilizer box is used to store fertilizer to meet the long-term fertilization operation. The side wall of the quantitative fertilizer cavity 1 is connected to the box 2, and a fertilizer amount adjustment component 3 is adjustable between the box 2 and the quantitative fertilizer cavity 1. The upper and lower sides of the box 2 are respectively provided with an upper slide cover 4 and a lower slide cover 5 in parallel. In this embodiment, the fertilizer amount adjustment component 3 can change the degree of its entry into the quantitative fertilizer cavity by adjusting the position, thereby changing the size of the quantitative fertilizer cavity corresponding to the area between the upper slide cover and the lower slide cover, so as to accurately control the amount of fertilizer discharge. The upper slide cover 4 and the lower slide cover 5 are respectively connected to a pair of opening and closing mechanisms 6 arranged on the box 2, and the two opening and closing mechanisms are respectively used to control the upper slide cover and the lower slide cover to slide back and forth in sequence. The box body 2 is provided with a power shaft 7, and the opening and closing mechanism 6 is connected to the power shaft 7 through an incomplete gear transmission mechanism 8, so that the power shaft 7 can transmit the power of the power shaft to the opening and closing mechanism through the incomplete gear transmission mechanism 8, and the opening and closing mechanism 6 controls the upper sliding cover 4 and the lower sliding cover 5 to close or open the openings at the upper and lower ends of the quantitative fertilizer cavity 1. In this embodiment, the power shaft is connected to the output end of the motor or agricultural machinery, so that the power is input to the power shaft of the fertilizer discharger to drive the power shaft to rotate.

[0028] In the present embodiment, in actual use, the fertilizer amount adjustment component 3 is first adjusted to adjust the fertilizer discharge amount to the set value, and then the power shaft drives the two opening and closing mechanisms to work alternately and periodically through the incomplete gear transmission mechanism, and the power shaft rotates to drive the upper sliding cover to move backward, so that the upper end opening of the quantitative fertilizer cavity is opened, so that the fertilizer in the fertilizer box falls into the quantitative fertilizer cavity between the upper sliding cover and the lower sliding cover, and the power shaft continues to rotate to drive the upper sliding cover to reset, and the loading is completed. Then the power shaft rotates to drive the lower sliding cover to move backward through the opening and closing mechanism below, and the lower end opening of the quantitative fertilizer cavity is opened. The fertilizer falls through the lower end opening into the fertilizer delivery pipe and is discharged through the fertilizer delivery pipe. The power shaft continues to rotate to drive the lower sliding cover to reset. The structural design of the present embodiment is ingenious. Through the flexible control of the alternating opening and closing of the upper sliding cover and the lower sliding cover, the opening and closing of the upper and lower ends of the quantitative fertilizer cavity are controlled, so that the fertilizer uniform speed automatic loading and discharge process can be controlled, the quantitative control of the material discharge is accurate, and the fertilization is uniform.

[0029] Embodiment 2, an incomplete gear transmission variable cavity fertilizer discharger, such as Figure 3 , 4 5, on the basis of embodiment 1, the incomplete gear transmission mechanism 8 includes an incomplete bevel gear 9 fixedly arranged coaxially with the power shaft 7, the incomplete bevel gear 9 is provided with a bevel gear section 10 and a toothless section, a pair of gear shafts 11 are vertically symmetrically rotated on the housing 2, and bevel gears 12 are provided on the gear shafts 11, the bevel gear section 10 can alternately mesh with the upper and lower bevel gears 12 when the incomplete bevel gear 9 rotates, and the two gear shafts 11 are respectively connected to two opening and closing mechanisms. In this embodiment, the bevel gear section 10 and the toothless section occupy half a circle respectively, and the sizes of the bevel gear and the bevel gear section meet the requirement that the bevel gear meshing with the bevel gear section rotates one circle during the half-circle rotation of the incomplete bevel gear.

[0030] As a further implementation scheme, a fixed disc seat 13 is provided on the power shaft 7, and a circular arc boss 14 is provided on the fixed disc seat 13, and the circular arc boss 14 is arranged corresponding to the toothless section. In this embodiment, the circular arc boss is coaxially fixed on the side wall of the fixed disc seat. A positioning disc 15 is fixed on the gear shaft 11 by means of a set screw, and a cutting plane 16 matching the circular arc boss 14 is provided on the positioning disc 15, and the cutting plane 16 makes the positioning disc form an incomplete disc with a cutting angle. In this embodiment, the fixed disc seat 13 is connected to the incomplete bevel gear by bolts, so that the toothless sections of the two correspond to the circular arc boss, and at the same time, the incomplete bevel gear is connected to the power shaft by a set screw to form a fixation.

[0031] When the present embodiment is in use, in the initial state, the upper sliding cover and the lower sliding cover respectively close the two ends of the quantitative fertilizer cavity. During the process of the power shaft 7 rotating one circle, in the first half of the cycle, the bevel gear segment 10 first meshes with the bevel gear 12 on the upper gear shaft 11, driving the gear shaft 11 to rotate one circle, first driving the opening and closing mechanism to control the upper sliding cover 4 to move backward and then move forward to reset. At the same time, the upper gear shaft 11 drives the positioning plate 15 to rotate, and the positioning plate 15 corresponds to the part of the fixed plate seat 13 where the arc-shaped boss 14 is not provided, and the two rotate synchronously. In this process, there is no tooth segment corresponding to the lower bevel gear 12, and there is no transmission cooperation between the two, so the lower gear shaft 11 does not rotate. At the same time, the positioning plate 15 on the lower gear shaft 11 does not rotate in this process, and the cutting plane 16 on the positioning plate 15 slides with the arc-shaped boss 14, thereby preventing the lower gear shaft from rotating. In the second half of the cycle, the bevel gear segment 10 moves to mesh with the bevel gear 12 on the gear shaft 11 below, driving the gear shaft below to rotate one circle, and then driving the opening and closing mechanism to control the lower slide cover to move backward and then forward to reset. A fertilization operation is completed, and then a reciprocating cycle is repeated.

[0032] In addition, in the present embodiment, both ends of the power shaft 7 are rotatably connected to the housing through bearings respectively, and the housing 2 is provided with a shaft end pressure cover 17 and a transparent cover 18 cooperating with the power shaft 7. One end of the power shaft 7 passes through the housing, and a through hole is provided in the middle of the transparent cover to allow the power shaft to pass through.

[0033] This embodiment adopts an incomplete bevel gear that alternately meshes and rotates with the upper and lower bevel gears to control the regular opening and closing of the upper and lower sliding covers of the opening and closing device, thereby realizing the falling in and discharge of fertilizers. The opening and closing speed of the upper and lower sliding covers can also be reliably adjusted by appropriately adjusting the rotation speed of the power shaft 7, thereby adjusting the fertilizer discharge speed, achieving efficient fertilization, and improving fertilizer discharge efficiency.

[0034] Embodiment 3, an incomplete gear transmission modified cavity fertilizer dispenser, based on embodiment 2, the end of the gear shaft 11 passes through the box body, the opening and closing mechanism 6 includes a crank 19 fixed at one end of the gear shaft 11, and the other end of the crank 19 is provided with a copper ring slider 20. The upper slide cover 4 and the lower slide cover 5 are both horizontally provided with a track slide hole 21, and the copper ring slider 20 is slidably arranged in the track slide hole 21. In this embodiment, the track slide hole 21 is a long waist hole, and the length of the track slide hole is greater than the diameter of the copper ring slider to make a circular motion when the gear shaft rotates, so that the copper ring slider can rotate around the gear shaft for a complete circle.

[0035] The side wall of the box body 2 is provided with a slide groove 24, and the upper slide cover 4 and the lower slide cover 5 are provided with a long slide rail 25 for slidingly cooperating with the slide groove 24. The upper slide cover 4 and the lower slide cover 5 are both connected with a fertilizer discharge tongue 22, and the box body 2 is provided with a through hole 23 corresponding to the upper and lower ends of the matching end with the quantitative fertilizer cavity, which is satisfied that the fertilizer discharge tongue 22 passes through, and the box body 2 is provided with an opening between the two through holes 23 to meet the extension of the fertilizer amount adjustment component 3. The quantitative fertilizer cavity 1 is a U-shaped trough body, and the open end of the U-shaped trough body is bolted to the box body 2. The upper and lower openings of the U-shaped trough body are both rectangular openings, which are respectively connected to the fertilizer box and the fertilizer discharge pipe.

[0036] In addition, as an optional embodiment, the upper sliding cover surface is provided with a process hole 31 for crank installation. The end of the gear shaft 11 is a square shaft, and one end of the crank 19 is provided with a square hole. The crank is connected to the square shaft through the square hole and locked by bolts. A collar 32 is provided on the gear shaft. When the crank is locked, the collar can press against the side wall of the positioning plate 15, thereby limiting the position of the positioning plate.

[0037] When this embodiment is in use, when the gear shaft rotates one circle driven by the bevel gear, the crank 19 on the top is driven to rotate one circle, and the crank 19 slides in the track slide hole 21 through the copper ring slider 20, thereby pulling the upper slide cover or the lower slide cover to reciprocate. During the reciprocating movement, the fat discharge tongue 22 slides in the through hole, thereby opening and closing the openings at the upper and lower ends of the U-shaped trough body.

[0038] Embodiment 4, an incomplete gear transmission variable cavity fertilizer discharger, such as Figure 6 As shown, on the basis of Example 3, the fertilizer amount adjustment component 3 includes an adjustment block 34 slidably arranged on the box body, the adjustment block 34 is fixedly connected to the sliding shaft 33, and the box body 2 is horizontally provided with a long waist hole 30, and the sliding shaft 33 is slidably arranged on the long waist hole. In addition, a scale 26 is provided on the box body 2, and the sliding shaft 33 is provided with a pointer 27 that cooperates with the scale 26. In this embodiment, the pointer is fixed to the sliding shaft by bolts, and the sliding shaft and the pointer can be locked on the box body by adjusting the tightness of the bolts, thereby fixing the amount of fertilizer discharged. During sowing, the degree to which the sliding adjustment block enters the quantitative fertilizer cavity changes the shape and volume of the quantitative fertilizer cavity between the upper sliding cover and the lower sliding cover, and at the same time, the single fertilizer discharge amount is adjusted by referring to the position reading of the pointer and the scale, so as to achieve accurate quantitative fertilizer discharge.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An incomplete gear transmission variable cavity fertilizer discharger, comprising a quantitative fertilizer cavity (1), wherein the quantitative fertilizer cavity (1) is provided with openings for feeding and discharging fertilizer at upper and lower ends, respectively. Features: The side wall of the quantitative fertilizer cavity (1) is connected to the box body (2); a fertilizer amount adjustment component (3) is adjustable between the box body (2) and the quantitative fertilizer cavity (1); an upper sliding cover (4) and a lower sliding cover (5) are respectively and parallelly arranged on the upper and lower sides of the box body (2); the upper sliding cover (4) and the lower sliding cover (5) are respectively connected to a pair of opening and closing mechanisms (6) arranged on the box body (2); a power shaft (7) is arranged on the box body (2); the opening and closing mechanism (6) and the power shaft (7) are connected via an incomplete gear transmission mechanism (8); the power shaft (7) can control the upper sliding cover (4) and the lower sliding cover (5) to close or open the openings at the upper and lower ends of the quantitative fertilizer cavity (1) via the incomplete gear transmission mechanism (8) and the opening and closing mechanism (6).

2. The incomplete gear transmission variable cavity fertilizer discharger according to claim 1, Features: The incomplete gear transmission mechanism (8) comprises an incomplete bevel gear (9) fixedly arranged coaxially with the power shaft (7), the incomplete bevel gear (9) being provided with a bevel gear segment (10) and a toothless segment; a pair of gear shafts (11) are vertically symmetrically rotatably arranged on the housing (2), the gear shafts (11) being provided with bevel gears (12), and the bevel gear segments (10) are capable of alternately meshing with the upper and lower bevel gears (12) when the incomplete bevel gear (9) rotates.

3. The incomplete gear transmission variable cavity fertilizer discharger according to claim 2, Features: The power shaft (7) is provided with a fixed disc seat (13), the fixed disc seat (13) is provided with a circular arc boss (14), and the circular arc boss (14) is arranged corresponding to the toothless segment; a positioning disc (15) is fixedly provided on the gear shaft (11), and the positioning disc (15) is provided with a tangent plane (16) matching the circular arc boss (14).

4. The incomplete gear transmission variable cavity fertilizer discharger according to claim 3, Features: The box body (2) is provided with a shaft end pressure cover (17) and a transparent cover (18) that cooperate with the power shaft (7).

5. The incomplete gear transmission variable cavity fertilizer discharger according to any one of claims 2 to 4, Features: The opening and closing mechanism (6) comprises a crank (19) having one end fixedly arranged at the end of the gear shaft (11), and a copper ring slider (20) is arranged at the other end of the crank (19).

6. The incomplete gear transmission variable cavity fertilizer discharger according to claim 5, Features: The upper sliding cover (4) and the lower sliding cover (5) are both provided with a track sliding hole (21) transversely, and the copper ring slider (20) is slidably arranged in the track sliding hole (21).

7. The incomplete gear transmission variable cavity fertilizer discharger according to claim 6, Features: The side wall of the box body (2) is provided with a slide groove (24), and the upper slide cover (4) and the lower slide cover (5) are both provided with a long slide rail (25) for slidingly cooperating with the slide groove (24); the upper slide cover (4) and the lower slide cover (5) are both connected with a fertilizer discharge tongue (22), and the box body (2) is provided with a through hole (23) corresponding to the upper and lower ends of the matching end with the quantitative fertilizer cavity, which is sufficient for the fertilizer discharge tongue (22) to pass through, and the box body (2) is provided with an opening between the two through holes (23) to allow the fertilizer quantity adjustment component (3) to extend out.

8. The incomplete gear transmission variable cavity fertilizer discharger according to claim 7, Features: The quantitative fertilizer cavity (1) is a U-shaped trough, and the open end of the U-shaped trough is bolted to the box body (2).

9. The incomplete gear transmission variable cavity fertilizer discharger according to any one of claims 1 to 4, 6 to 8, Features: The fertilizer amount adjustment component (3) comprises an adjustment block (34) slidably arranged on the box body, the adjustment block (34) being fixedly connected to the sliding shaft (33), a long waist hole (30) being transversely arranged on the box body (2), and an end of the sliding shaft (33) being slidably arranged on the long waist hole (30).

10. The incomplete gear transmission variable cavity fertilizer discharger according to claim 9, Features: The box body (2) is provided with a scale (26), and the end of the sliding shaft (33) is provided with a pointer (27) that cooperates with the scale (26).

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