Device for adjusting lower pressure of seeding monomer

Abstract

A lower pressure adjusting device for a seeding single body relates to the technical field of agricultural mechanical equipment and comprises a single body floating mechanism, a lower pressure adjusting mechanism and a single body hanging mechanism. Each single floating mechanism comprises a front connecting frame, a rear connecting frame, an upper connecting rod assembly and a lower connecting rod assembly, wherein the upper connecting rod assembly and the lower connecting rod assembly are rotationally arranged between the front connecting frame and the rear connecting frame. The lower pressure adjusting mechanism comprises an upper spring pull rod, a lower spring pull rod and a pressure tension spring arranged between the upper spring pull rod and the lower spring pull rod, and the lower pressure can be changed by adjusting the positions of the upper spring pull rod and the lower spring pull rod. The single body hanging mechanism comprises a supporting plate arranged on the rear connecting frame and a locking block rotationally arranged on the lower connecting rod, and the locking block can be matched with the supporting plate to achieve hanging of the single bodies. According to the utility model, the technical problems in the prior art that the lower pressure of the seeding monomer is difficult to adjust, the adjusting range is small and the hanging is unreliable can be solved.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment technology, specifically to a pressure regulating device for a seeding unit. Background Technology

[0002] Most existing seeders use a four-bar linkage mechanism, and the downward pressure is adjusted by springs engaging different holes.

[0003] Adjusting the downforce requires manual disassembly and reassembly of the spring, which is time-consuming and labor-intensive. Furthermore, agricultural machinery often operates on wet and sticky soil, and the existing downforce adjustment mechanism has a limited range of adjustment and can only switch between a few fixed gears. It cannot make more detailed adjustments to the downforce according to specific field conditions. As a result, in some cases, due to the large weight of the seeding unit itself and excessive downforce, the seeding unit can easily damage the ridge shape and make operation impossible.

[0004] In addition, when multi-row seeders are in operation, the number of rows in a single plant often exceeds the number of remaining rows to be sown. In this case, it is necessary to hang up some of the plants. Seeders with this function on the market have laborious single-plant hanging operations, and the hanging is not secure. When there is a large vibration, the hanging may fail and the plant may fall down, which has caused a lot of complaints from users. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure regulating device for seeding units, which can solve the technical problems of difficult operation, small adjustment range, and unreliable hanging of seeding units in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A seeding unit pressure regulating device includes a seeding unit floating mechanism, a pressure regulating mechanism and a seeding unit hanging mechanism disposed on the seeding unit floating mechanism.

[0008] The single floating mechanism includes a front connecting frame, a rear connecting frame, and an upper connecting rod assembly and a lower connecting rod assembly rotatably disposed between the front connecting frame and the rear connecting frame. The upper connecting rod assembly includes two symmetrically arranged upper connecting rods, and the lower connecting rod assembly includes two symmetrically arranged lower connecting rods. One end of each upper connecting rod and lower connecting rod is rotatably connected to the front connecting frame, and the other end is rotatably connected to the rear connecting frame.

[0009] The downward pressure adjustment mechanism includes an upper continuous toothed groove on the upper connecting rod, a lower continuous toothed groove on the lower connecting rod, an upper spring rod, a lower spring rod, and a pressure spring between the upper spring rod and the lower spring rod. The upper spring rod and the lower spring rod cooperate with the upper continuous toothed groove and the lower continuous toothed groove respectively to achieve positioning, and the downward pressure can be changed by changing the position of the spring rod in the corresponding continuous toothed groove.

[0010] The single-unit hanging mechanism includes a support plate on the rear connecting frame for limiting the vertical floating range of the single unit and a locking block rotatably mounted on the lower connecting rod. The swinging locking block enables the locking block to cooperate with the support plate to hang the single unit.

[0011] Furthermore, the upper continuous tooth groove is provided on the upper side of the upper connecting rod along its length direction, and the lower continuous tooth groove is provided on the lower side of the lower connecting rod along its length direction.

[0012] Furthermore, both the upper and lower continuous tooth grooves include multiple tooth peaks arranged continuously.

[0013] Furthermore, the two ends of the upper spring rod are respectively positioned by engaging with the corresponding tooth peaks on the two upper connecting rods, and the two ends of the lower spring rod are respectively positioned by engaging with the corresponding tooth peaks on the two lower connecting rods.

[0014] Furthermore, both ends of the upper and lower spring rods are provided with waist-shaped through holes for engaging with tooth peaks. The waist-shaped through holes engage with tooth peaks at different positions, which can adjust the position of the upper or lower spring rod on the upper or lower connecting rod.

[0015] Furthermore, both the upper and lower spring rods have flat surfaces at their ends for engaging with a wrench. By engaging the wrench with these flat surfaces, the spring rods can be easily rotated, thereby allowing the spring rods to switch between adjacent tooth peaks.

[0016] Furthermore, both the upper and lower spring rods are provided with annular grooves in the middle, and the two ends of the pressure spring are respectively matched with the annular grooves on the upper and lower spring rods and are located between the upper and lower spring rods.

[0017] Furthermore, multiple annular grooves are provided in the middle of both the upper and lower spring rods, and multiple pressure springs are also provided, with the two ends of the pressure springs respectively engaging with the corresponding annular grooves on the upper and lower spring rods.

[0018] Furthermore, the support plate includes an upper contact end and a lower contact end. The upper contact end is used to contact the upper connecting rod to prevent the unit from continuing to rise when the unit rises, and the lower contact end is used to contact the lower connecting rod to prevent the unit from continuing to fall when the unit falls.

[0019] Furthermore, the locking block is provided with limiting pins for limiting the extreme positions of the locking block swinging on both sides. When the locking block is at one extreme position, the single unit can float up and down. When the locking block is at the other extreme position, it can contact the lower contact end to prevent the single unit from falling, thereby realizing the hanging of the single unit.

[0020] Furthermore, a spring mechanism is provided between the locking block and the lower connecting rod to keep the locking block in one of its two extreme positions. The spring mechanism includes a locking spring, a fixed pin on the lower connecting rod, and a movable pin on the locking block. The two ends of the locking spring are connected to the fixed pin and the movable pin, respectively. When the locking block is moved from one extreme position to the other, the tension of the locking spring is at its maximum when it reaches the middle position, thereby keeping the locking block in one extreme position.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects:

[0022] 1. The downward pressure adjustment of this utility model is simple and quick, and can be completed by a single person using a wrench, without the need to disassemble or assemble the pressure spring;

[0023] 2. By setting up upper and lower spring levers that can be adjusted independently, this utility model greatly increases the range of adjustable downward pressure and significantly improves the adaptability of the seed unit to the soil.

[0024] 3. The continuous toothed groove of this utility model increases the adjustment range of the spring rod position by continuously setting multiple tooth peaks, while the tension change between adjacent positions is smaller, and the adjustment is more delicate;

[0025] 4. By adjusting the positions of the upper and lower spring rods, this invention can achieve the upward force of the seed unit, thereby offsetting the weight of the seed unit and achieving less pressure on the ground;

[0026] 5. This utility model uses a locking block against the lower contact end of the support plate to hang the seeding unit. Even if vibration occurs, it will not fail and cause the unit to fall, making it more reliable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention that generates downward pressure on the seeding monomer.

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention, which generates an upward force on the seeding unit after adjusting the positions of the upper and lower spring levers.

[0029] Figure 3 This is a schematic diagram showing the state of the seeding unit when it is hung up in this invention.

[0030] Figure 4 This is a top view of the structure of the present invention.

[0031] Figure 5 This is a three-dimensional structural schematic diagram of the present invention (explosion display of the pressure spring and locking spring).

[0032] Figure 6 This is a schematic diagram of the overall structure of the spring rod in this invention.

[0033] Figure Descriptions: 1. Single floating mechanism; 11. Front connecting frame; 12. Rear connecting frame; 13. Upper connecting rod assembly; 131. Upper connecting rod; 14. Lower connecting rod assembly; 141. Lower connecting rod; 2. Lower pressure adjustment mechanism; 21. Upper continuous toothed groove; 22. Lower continuous toothed groove; 23. Upper spring rod; 24. Lower spring rod; 25. Pressure spring; 26. Tooth peak; 27. Waist-shaped through hole; 28. Annular groove; 29. ​​Plane; 3. Single hanging mechanism; 31. Support plate; 311. Upper contact end; 312. Lower contact end; 32. Locking block; 321. Limit pin; 322. Rotating pin; 33. Spring mechanism; 331. Locking spring; 332. Fixed pin; 333. Movable pin. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clearer, the features and performance of a seeding monomer pressure regulating device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] Please see the appendix Figures 1-6 A seeding unit pressure regulating device includes a seeding unit floating mechanism 1, a pressure regulating mechanism 2 and a seeding unit hanging mechanism 3 disposed on the seeding unit floating mechanism 1.

[0036] The single floating mechanism 1 includes a front connecting frame 11, a rear connecting frame 12, and an upper connecting rod assembly 13 and a lower connecting rod assembly 14 rotatably disposed between the front connecting frame 11 and the rear connecting frame 12. The upper connecting rod assembly 13 includes two symmetrically arranged upper connecting rods 131, and the lower connecting rod assembly 14 includes two symmetrically arranged lower connecting rods 141. One end of the upper connecting rod 131 and the lower connecting rod 141 are rotatably connected to the front connecting frame 11, and the other end is rotatably connected to the rear connecting frame 12.

[0037] The downward pressure adjustment mechanism 2 includes an upper continuous toothed groove 21 on the upper connecting rod 131, a lower continuous toothed groove 22 on the lower connecting rod 141, an upper spring rod 23, a lower spring rod 24, and a pressure spring 25 between the upper spring rod 23 and the lower spring rod 24. The upper spring rod 23 and the lower spring rod 24 are respectively positioned by cooperating with the upper continuous toothed groove 21 and the lower continuous toothed groove 22, and the downward pressure can be changed by changing the position of the spring rod in the corresponding continuous toothed groove.

[0038] The upper continuous toothed groove 21 is provided on the upper side of the upper connecting rod 131 along its length direction, and the lower continuous toothed groove 22 is provided on the lower side of the lower connecting rod 141 along its length direction.

[0039] Both the upper continuous tooth groove 21 and the lower continuous tooth groove 22 include multiple tooth peaks 26 arranged continuously.

[0040] The two ends of the upper spring rod 23 are respectively positioned by engaging with the corresponding tooth peaks 26 on the two upper connecting rods 131, and the two ends of the lower spring rod 24 are respectively positioned by engaging with the corresponding tooth peaks 26 on the two lower connecting rods 141.

[0041] Both ends of the upper spring rod 23 and the lower spring rod 24 are provided with waist-shaped through holes 27 for engaging with tooth peaks 26. The waist-shaped through holes 27 engage with tooth peaks 26 at different positions to adjust the position of the upper spring rod 23 or the lower spring rod 24 on the upper connecting rod 131 or the lower connecting rod 141.

[0042] Both the upper spring rod 23 and the lower spring rod 24 have a flat surface 29 at their ends for engaging with a wrench. By engaging the wrench with the flat surface 29, the spring rod can be easily rotated, thereby enabling the spring rod to switch between adjacent tooth cusps 26.

[0043] Both the upper spring rod 23 and the lower spring rod 24 have annular grooves 28 in the middle. The two ends of the pressure spring 25 are respectively matched with the annular grooves 28 on the upper spring rod 23 and the lower spring rod 24 and are located between the upper spring rod 23 and the lower spring rod 24.

[0044] Multiple annular grooves 28 are provided in the middle of the upper spring rod 23 and the lower spring rod 24, and they correspond one to one. Multiple pressure springs 25 are also provided, and the two ends of the pressure springs 25 respectively cooperate with the corresponding annular grooves 28 on the upper spring rod 23 and the lower spring rod 24.

[0045] The single-unit hanging mechanism 3 includes a support plate 31 on the rear connecting frame 12 for limiting the vertical floating range of the single unit and a locking block 32 rotatably mounted on the lower connecting rod 141. The swinging locking block 32 can cooperate with the support plate 31 to hang the single unit.

[0046] The support plate 31 includes an upper contact end 311 and a lower contact end 312. The upper contact end 311 is used to contact the upper connecting rod 131 to prevent the single unit from rising further when it rises, and the lower contact end 312 is used to contact the lower connecting rod 141 to prevent the single unit from falling further when it falls.

[0047] The locking block 32 is provided with a limiting pin 321 for limiting the extreme positions of the two sides of the locking block 32 swing. When the locking block 32 is in one extreme position, the single unit can float up and down. When the locking block 32 is in the other extreme position, it can contact the lower contact end 312 to prevent the single unit from falling, thereby realizing the hanging of the single unit.

[0048] A spring mechanism 33 is also provided between the locking block 32 and the lower connecting rod 141 to keep the locking block 32 in one of its two extreme positions. The spring mechanism 33 includes a locking spring 331, a fixed pin 332 on the lower connecting rod 141, and a movable pin 333 on the locking block 32. The two ends of the locking spring 331 are connected to the fixed pin 332 and the movable pin 333, respectively. When the locking block 32 is moved from one extreme position to the other extreme position, the tension of the locking spring 331 is at its maximum when it reaches the middle position, thereby keeping the locking block 32 in one extreme position.

[0049] In specific implementation, a pressure adjustment device for a seeding unit can be applied to the seeding unit of a precision seeder. This device has the advantages of simple and quick pressure adjustment without disassembly; the pressure can be adjusted in both directions, greatly improving the adaptability of the seeding unit to the soil; and the unit can be quickly hung up for easy switching operations.

[0050] Its structure is mainly composed of three functional components: a single floating mechanism 1, a downward pressure adjustment mechanism 2, and a single hanging mechanism 3.

[0051] The single floating mechanism 1 is the main part of the adjustment device, including a front connecting frame 11, a rear connecting frame 12, an upper connecting rod assembly 13, and a lower connecting rod assembly 14. The upper connecting rod assembly 13 includes two symmetrically arranged upper connecting rods 131, and the lower connecting rod assembly 14 includes two symmetrically arranged lower connecting rods 141.

[0052] Two upper connecting rods 131 are mounted at one end on the upper left and right sides of the front connecting frame 11, and at the other end connected to the upper part of the rear connecting frame 12, with the connection point being hinged. Two lower connecting rods 141 are mounted at one end on the lower part of the front connecting frame 11, and at the other end connected to the lower part of the rear connecting frame 12, with the connection point being hinged. A seeding unit assembly for furrowing is installed at the rear end of the rear connecting frame 12, and the unit floating mechanism 1 allows the seeding unit to float up and down with the terrain.

[0053] The downward pressure adjustment mechanism 2 includes an upper continuous toothed groove 21 on the upper connecting rod 131, a lower continuous toothed groove 22 on the lower connecting rod 141, an upper spring rod 23, a lower spring rod 24, and a pressure spring 25 located between the upper spring rod 23 and the lower spring rod 24. The upper spring rod 23 has two ends passing through oblong through holes 27, which engage with the upper continuous toothed groove 21 on the two upper connecting rods 131. The lower spring rod 24 has two ends passing through oblong through holes 27, which engage with the lower continuous toothed groove 22 on the two lower connecting rods 141.

[0054] The upper end of the pressure spring 25 is hung in the annular groove 28 on the upper spring rod 23, and the lower end is hung in the annular groove 28 on the lower spring rod 24. The upper spring rod 23 and the lower spring rod 24 can be adjusted back and forth on the upper connecting rod assembly 13 and the lower connecting rod assembly 14. Adjusting the position of the upper spring rod 23 and the lower spring rod 24 can adjust the downward pressure to increase or decrease.

[0055] The single-unit lifting mechanism 3 includes a support plate 31, a locking block 32, and a spring mechanism 33. Two support plates 31 are fixedly installed on the left and right sides of the rear connecting frame 12, respectively. The support plates 31 limit the upward and downward floating range of the single-unit floating mechanism 1. Each support plate 31 includes an upper contact end 311 and a lower contact end 312. The upper contact end 311 contacts the upper connecting rod 131 to prevent the single unit from rising further when it rises, and the lower contact end 312 contacts the lower connecting rod 141 to prevent the single unit from falling further when it falls.

[0056] The locking block 32 is rotatably mounted on the lower connecting rod 141 via a rotating pin 322. The locking block 32 can swing around the rotating pin 322, and a limiting pin 321 is provided in the middle hole of the locking block 32. The locking block 32 can support the support plate 31, so that the rear connecting frame 12 and the subsequent seeding unit are suspended and cannot float.

[0057] The spring mechanism 33 includes a locking spring 331, a fixed pin 332 on the lower connecting rod 141, and a movable pin 333 on the locking block 32. One end of the locking spring 331 is attached to the fixed pin 332, and the other end is attached to the movable pin 333. The locking spring 331 acts as a locking spring.

[0058] Figure 1 This diagram illustrates the working state of the seeding unit. With the lower end of the tension spring 25 closer to the front connecting frame 11, the tension generated by the tension spring 25 exerts downward pressure on the rear connecting frame 12, increasing the pressure of the seeding unit on the ground.

[0059] like Figure 6 As shown, the upper spring rod 23 has flat surfaces 29 milled on both sides, allowing it to be rotated with a wrench. It has four annular grooves 28 in the middle, and an oblong through hole 27 with a flat surface milled in the middle. The upper sides of the two upper connecting rods 131 have continuous upper toothed grooves 21, with tooth cusps 26 embedded in the oblong through hole 27 of the upper spring rod 23 to prevent left and right movement of the upper spring rod 23. The lower connecting rod 141 has continuous lower toothed grooves 22 on its lower side, with tooth cusps 26 embedded in the oblong through hole 27 of the lower spring rod 24.

[0060] The upper end of the pressure spring 25 is hung in the annular groove 28 of the upper spring rod 23, and the lower end is hung in the annular groove 28 of the lower spring rod 24. When it is necessary to adjust the pressure on the ground, the upper spring rod 23 and the lower spring rod 24 can be rotated with a wrench to change the vertical position of the pressure spring 25, thereby adjusting the pressure on the ground, which is convenient and quick.

[0061] Figure 2 This diagram illustrates the tension spring 25 in its reverse-tension state. The upper end of the tension spring 25 is closer to the front connecting frame 11. At this point, the tension force generated by the tension spring 25 exerts an upward lifting force on the rear connecting frame 12, reducing the pressure of the seed unit on the ground. The operation method is the same: turn the upper and lower spring levers with a wrench. This state is mainly applicable to fields with loose soil, high moisture content, and already tilled land.

[0062] Figure 3 This is a schematic diagram showing the state of the seed unit being hung up. In conjunction with the aforementioned spring counter-pull operation, when the lifting force generated by the pressure spring 25 exceeds the weight of the seed unit, the rear connecting frame 12 and the subsequent seed unit device can be lifted upwards, the seeding and furrowing device leaves the ground, and the cutting operation begins. At this point, the locking block 32 is moved below the support plate 31, preventing the seed unit from floating, and the locking spring 331 locks the locking block 32.

[0063] By implementing the above methods, this utility model solves the problems of time-consuming and laborious pressure adjustment, inability to adapt to soft and moist soil, and inability to reduce the number of rows in precision seeders. This seeder's pressure adjustment device has the advantages of simple and quick pressure adjustment without disassembly; bidirectional pressure adjustment improves the seeder's adaptability to soil; and the seeder can be quickly hung up for easy switching operations.

[0064] It should be noted that the parts not described in detail in this solution are all prior art. The above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A pressure regulating device for seeding monomers, characterized in that: It includes a single floating mechanism (1), a downward pressure adjustment mechanism (2) and a single hanging mechanism (3) provided on the single floating mechanism (1). The single-unit floating mechanism (1) includes a front connecting frame (11), a rear connecting frame (12), and an upper connecting rod assembly (13) and a lower connecting rod assembly (14) rotatably disposed between the front connecting frame (11) and the rear connecting frame (12). The upper connecting rod assembly (13) includes two symmetrically arranged upper connecting rods (131), and the lower connecting rod assembly (14) includes two symmetrically arranged lower connecting rods (141). One end of each of the upper connecting rods (131) and the lower connecting rods (141) is rotatably connected to the front connecting frame (11), and the other end is rotatably connected to the rear connecting frame (12). The downward pressure adjustment mechanism (2) includes an upper continuous toothed groove (21) on the upper connecting rod (131), a lower continuous toothed groove (22) on the lower connecting rod (141), an upper spring rod (23), a lower spring rod (24), and a pressure spring (25) between the upper spring rod (23) and the lower spring rod (24). The upper spring rod (23) and the lower spring rod (24) are respectively positioned by cooperating with the upper continuous toothed groove (21) and the lower continuous toothed groove (22), and the downward pressure can be changed by changing the position of the spring rod in the corresponding continuous toothed groove. The single-unit hanging mechanism (3) includes a support plate (31) on the rear connecting frame (12) for limiting the vertical floating range of the single unit and a locking block (32) rotatably mounted on the lower connecting rod (141). The swinging locking block (32) can make the locking block (32) cooperate with the support plate (31) to hang the single unit.

2. The pressure regulating device for seeding units as described in claim 1, characterized in that: The upper continuous tooth groove (21) is provided on the upper side of the upper connecting rod (131) along its length direction, and the lower continuous tooth groove (22) is provided on the lower side of the lower connecting rod (141) along its length direction.

3. The pressure regulating device for seeding units as described in claim 2, characterized in that: Both the upper continuous tooth groove (21) and the lower continuous tooth groove (22) include multiple tooth peaks (26) arranged continuously.

4. The pressure regulating device for seeding units as described in claim 3, characterized in that: The two ends of the upper spring rod (23) are respectively positioned by engaging with the corresponding tooth peaks (26) on the two upper connecting rods (131), and the two ends of the lower spring rod (24) are respectively positioned by engaging with the corresponding tooth peaks (26) on the two lower connecting rods (141).

5. The pressure regulating device for seeding units as described in claim 4, characterized in that: Both ends of the upper spring rod (23) and the lower spring rod (24) are provided with waist-shaped through holes (27) for engaging with tooth peaks (26). The waist-shaped through holes (27) engage with tooth peaks (26) at different positions, which can adjust the position of the upper spring rod (23) or the lower spring rod (24) on the upper connecting rod (131) or the lower connecting rod (141).

6. The pressure regulating device for seeding units as described in claim 1, characterized in that: Both the upper spring rod (23) and the lower spring rod (24) are provided with annular grooves (28) in the middle. The two ends of the pressure spring (25) are respectively matched with the annular grooves (28) on the upper spring rod (23) and the lower spring rod (24) and are located between the upper spring rod (23) and the lower spring rod (24).

7. The pressure regulating device for seeding units as described in claim 6, characterized in that: Multiple annular grooves (28) are provided in the middle of the upper spring rod (23) and the lower spring rod (24), and they correspond one to one. Multiple pressure springs (25) are also provided, and the two ends of the pressure springs (25) are respectively engaged with the corresponding annular grooves (28) on the upper spring rod (23) and the lower spring rod (24).

8. The pressure regulating device for seeding units as described in claim 1, characterized in that: The support plate (31) includes an upper contact end (311) and a lower contact end (312). The upper contact end (311) is used to contact the upper connecting rod (131) to prevent the single unit from rising further when it rises, and the lower contact end (312) is used to contact the lower connecting rod (141) to prevent the single unit from falling further when it falls.

9. The pressure regulating device for seeding units as described in claim 8, characterized in that: The locking block (32) is provided with a limiting pin (321) for limiting the extreme positions of the two sides of the locking block (32) swing. When the locking block (32) is in one extreme position, the single unit can float up and down. When the locking block (32) is in the other extreme position, it can contact the lower contact end (312) to prevent the single unit from falling, thereby realizing the hanging of the single unit.

10. The pressure regulating device for seeding monomers as described in claim 9, characterized in that: A spring mechanism (33) is provided between the locking block (32) and the lower connecting rod (141) to keep the locking block (32) in one of the extreme positions on both sides. The spring mechanism (33) includes a locking spring (331), a fixed pin (332) on the lower connecting rod (141), and a movable pin (333) on the locking block (32). The two ends of the locking spring (331) are connected to the fixed pin (332) and the movable pin (333) respectively.

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