CN213818822U

CN213818822U - A down force adjustment mechanism for agricultural machine

Info

Publication number: CN213818822U
Application number: CN202021191054.8U
Authority: CN
Inventors: 项桂峰; 李子君; 赵东; 袁志刚
Original assignee: Qingdao Pafic Hardware Co ltd
Current assignee: Qingdao Pafic Hardware Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-07-30
Anticipated expiration: 2030-06-23

Abstract

The utility model provides a lower pressure adjusting mechanism for agricultural machinery, which comprises a clamping piece, two upper arms and two lower arms, wherein the two upper arms are provided with a pair of mounting holes and a pair of long holes, and a position-adjustable limiting shaft is arranged on the two long holes; a connecting rod positioned on the right side of the long hole is connected between the two lower arms; the two upper arms are provided with a lower pressing frame, the lower pressing frame is provided with two parallel vertical plates, the middle positions of the two vertical plates are respectively hinged and matched with the two mounting holes, the right sides of the two vertical plates extend to the left lower side to form inclined holes with corresponding positions, the left sides of the two inclined holes are respectively provided with a plurality of pairs of clamping grooves with corresponding positions, and the limiting shaft can be clamped into any pair of clamping grooves; the device also comprises at least one tension spring, one end of the tension spring is connected to the left side of the lower pressing frame, and the other end of the tension spring is connected to the connecting rod. The single use of this mechanism tools such as spanner can accomplish down force control.

Description

A down force adjustment mechanism for agricultural machine

Technical Field

The utility model relates to the field of agricultural machinery, especially, relate to a lower pressure adjustment mechanism for agricultural machinery.

Background

When agricultural machinery carries out ground operations such as seeding, fertilizing and the like, relevant equipment needs to adjust downward pressure, namely downward pressure, according to different ground conditions and actual needs; specifically, the downforce is the ballast force applied to the device toward the ground to promote interaction between the device and the ground, and the magnitude of the downforce is adjusted by the adjustment mechanism.

At present, the downward pressure regulating mechanism is often used in combination with ground operation equipment such as single-seed sowing machines, precision planting machines, fertilizer distributing machines, sowing, fertilizing and mixing machines and the like. Such as precision seed planters, which are used to form furrows and transport seeds from a hopper into the furrows, in order to ensure efficient seed growth, the seeds of each species must be placed at an appropriate depth, at which time a downforce adjustment mechanism is required to adjust the downforce to meet the planting depth requirements. Taking a precision planter as an example, the structure of the down pressure adjusting mechanism in the prior art and the working principle thereof are as follows: the down force adjusting mechanism comprises a clamping piece and an extension spring, wherein an upper arm and a lower arm are hinged to the clamping piece, the extension spring is obliquely arranged, one end of the extension spring is connected to the lower arm and is not changed in position, the end of the extension spring is connected to the end, close to the clamping piece, of the lower arm, the end, adjustable in position, of the other end of the extension spring is connected to the end, far away from the clamping piece, of the upper arm, the adjustment of the down force is achieved through the tension adjusting of the extension spring, and the larger the tension is, the larger the down force is. When in use: the lateral axis cooperation on holder and the tractor link is connected, upper arm and lower arm all articulate with the precision planter, and the extension spring is close to the tractor in the one end of underarm this moment, keeps away from the tractor in the one end of upper arm. When the down pressure needs to be adjusted, the locking relation between the tension spring and the upper arm is firstly released during operation, and the tension spring is adjusted to the proper gear of the upper arm and locked again according to the gear designed in advance so as to achieve the required down pressure. In the prior art, the tension spring and the upper arm are locked through structures such as bolts, the operation is time-consuming and labor-consuming, particularly, when the downward pressure is increased, the restoring force of the tension spring needs to be overcome, the operation is very difficult, and the whole working process is finished by at least two persons; therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a down pressure adjusting structure with simple structure, stable performance, and time and labor saving.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a down force adjustment mechanism for agricultural machine, its simple structure, it is convenient to adjust, single down force adjustment that can accomplish to overcome the defect in the prior art.

In order to solve the technical problem, the utility model discloses a following technical scheme: a downward pressure adjusting mechanism for agricultural machinery comprises a clamping piece, wherein a hook matched with the agricultural machinery is arranged on the right side of the clamping piece, two upper arms and two lower arms extending towards the left side are hinged to the clamping piece, a pair of mounting holes corresponding in position and a pair of long holes corresponding in position are formed in the two upper arms from right to left, and position-adjustable limiting shafts are arranged along the length direction of the two upper arms and erected on the two long holes; a connecting rod positioned on the right side of the long hole is connected between the two lower arms; a lower pressing frame is arranged on the two upper arms, the lower pressing frame is provided with two vertical plates which extend downwards and are parallel, the middle positions of the two vertical plates are respectively hinged and matched with the two mounting holes, the right sides of the two vertical plates extend towards the left lower side to form inclined holes with corresponding positions, the left sides of the two inclined holes are respectively provided with a plurality of pairs of clamping grooves with corresponding positions, and the limiting shaft can be clamped into any pair of clamping grooves; still include an at least extension spring, the one end of extension spring is connected the pushing down frame left side, the other end is connected on the connecting rod.

Preferably, the lower pressing frame comprises a main plate, and the two vertical plates are vertically fixed on the main plate.

Preferably, a hanging shaft is erected between the two vertical plates, and one end of the tension spring is connected to the hanging shaft in a hooked mode.

Preferably, a first connecting shaft is erected between the two upper arms and hinged with the clamping piece through the first connecting shaft.

Preferably, a second connecting shaft is erected between the two lower arms, and the two lower arms are hinged to the clamping piece through the second connecting shaft.

Preferably, a third connecting shaft is erected between the two mounting holes, and the lower pressing frame is hinged to the third connecting shaft.

As described above, the utility model relates to a down force adjustment mechanism for agricultural machine has following beneficial effect:

this mechanism is through applying decurrent pressure to the holding down frame and adjusting the tensile degree of extension spring promptly to adjust the holding down force according to the decomposition principle of force, single use instrument such as spanner can accomplish, labour saving and time saving, simple structure and stability can effectively satisfy the agricultural machine that needs such as seeders imposed the holding down force.

Drawings

Fig. 1 is a usage state diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic view of another angle of the present invention.

Fig. 4 is a schematic view of the middle lower pressing frame of the present invention.

Fig. 5 is a first comparison diagram of the down pressure adjustment of the present invention.

Fig. 6 is a second comparative chart of the down force adjustment of the present invention.

In the figure:

1 clamping part 2 upper arm

3 lower arm 4 lower pressure frame

5 tension spring 6 cross shaft

7 seeder 21 mounting hole

Limiting shaft with 22 long holes 23

24 first connecting shaft 25 third connecting shaft

31 link 32 second connecting shaft

41 riser 42 mainboard

43 oblique hole for hanging spindle 411

412 clamping groove 11 hook

Detailed Description

The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should fall within the scope covered by the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

The utility model relates to a down force adjustment mechanism for agricultural machine, its main role is decurrent pressure when adjusting similar agricultural machine such as seeder and using, for example when seeding, fertilization, need let seed or chemical fertilizer fall into suitable degree of depth to accord with the planting requirement.

Combine fig. 1-4, the utility model discloses a holder 1, holder 1's right side be equipped with agricultural machine complex couple 11, holder 1 goes up articulated have two upper arms 2 and two underarms 3 that extend to the left side, two upper arms 2 and two underarms 3 can use articulated department as the center promptly, the luffing motion, provide the structure basis for the holding down force is adjusted. As shown in fig. 2 and 3, two upper arms 2 of the mechanism are provided with a pair of mounting holes 21 corresponding to each other in position and a pair of long holes 22 corresponding to each other in position from right to left, and the two long holes 22 are provided along the length direction of the upper arms and are provided with position-adjustable limiting shafts 23; a link 31 located on the right side of the long hole 22 is connected between the two lower arms 3. With reference to fig. 2 and 4, the two upper arms 2 are provided with a lower pressing frame 4, the lower pressing frame 4 is provided with two vertical plates 41 extending downward and parallel to each other, the middle positions of the two vertical plates 41 are respectively hinged to the two mounting holes 21, the right sides of the two vertical plates 41 extend to the left lower side to form oblique holes 411 corresponding in position, the left sides of the two oblique holes 411 are respectively provided with a plurality of pairs of clamping grooves 412 corresponding in position, and the limiting shaft 23 can be clamped into any pair of the clamping grooves 412, so as to lock the relative positions of the lower pressing frame 4 and the two upper arms 2. The mechanism further comprises at least one tension spring 5, one end of the tension spring 5 is connected to the left side of the lower pressing frame 4, and the other end of the tension spring is connected to the connecting rod 31.

Comparing fig. 5 and fig. 6, and combining fig. 1 and fig. 4, the principle and using method of the mechanism used in conjunction with a seeding machine are as follows: the couple 11 hook of holder 1 is hung on the cross axle 6 of tractor link, upper arm 2 with underarm 3 all is articulated with seeder 7, and fig. 5 is a operating condition of pushing down frame 4, and spacing axle 23 is arranged in a pair of draw-in groove 412 of position skew this moment, and extension spring 5 is in normality or slight tension state, receives the tensile force effect of self action of gravity and extension spring 5, and this mechanism is F1 to the overdraft that left seeder 7 produced this moment. When the downward pressure needs to be increased, the limiting shaft 23 is moved out of the clamping grooves 412 (the limiting shaft 23 moves in the long groove 22), then a single person applies downward pressure F to the right side of the lower pressing frame 4 by hand, the tension spring 5 is stretched by overcoming the restoring force of the tension spring 5 according to the lever principle, the lower pressing frame 4 rotates clockwise relative to the upper arm 2, and then the limiting shaft 23 is moved into the other pair of clamping grooves 412 as required and the limiting shaft 23 is locked. At this time, the tension spring 5 is stretched, the restoring force is increased, and according to the force decomposition principle, the downward pressure generated by the mechanism on the left seeder 7 is F2, F2 is greater than F1, the downward pressure is increased, and the ground operations such as seeding depth, fertilizing depth and the like can be increased. The clamping grooves 412 in the mechanism are provided with a plurality of pairs, the lower pressure is the largest when the limiting shaft 23 is matched with the clamping groove 412 at the uppermost side, the lower pressure is the smallest when the limiting shaft is matched with the clamping groove 412 at the lowermost side, the clamping grooves 412 are equivalent to different lower pressure adjusting gears, and the lower pressure adjustment is realized when the limiting shaft 23 is matched with the clamping grooves 412 at different positions.

Referring to fig. 4, in the preferred embodiment, for convenience of installation, the lower pressing frame 4 includes a main plate 42, and two vertical plates 41 are vertically fixed on the main plate 42. As shown in fig. 4, the vertical plate 41 and the main plate 42 may be provided with a plurality of through holes to reduce the overall weight. In addition, the vertical plate 41 and the main plate 42 in this embodiment may be formed by welding, or may be formed by bending a single steel plate or other metal plates.

Referring to fig. 2 and 3, for convenience of installation, a hanging shaft 43 is erected between two vertical plates 41, one end of the tension spring 5 is hooked on the hanging shaft 43, and external threads are arranged at two ends of the hanging shaft 43 and penetrate through the vertical plates 41 and are fixed by nuts, so that detachable connection is realized.

Referring to fig. 2 and 3, in a preferred embodiment, a first connecting shaft 24 is erected between the two upper arms 2 for convenience of installation and improvement of overall structural strength and structural stability, and is hinged to the holder 1 through the first connecting shaft 24. A second connecting shaft 32 is erected between the two lower arms 3, and is hinged with the clamping piece 1 through the second connecting shaft 32. Both ends of the first connecting shaft 24 and both ends of the second connecting shaft 32 are provided with external threads, and the connecting mode and principle of the hanging connecting shaft 43 and the vertical plate 41 are the same, and the hanging connecting shaft is detachably connected with the upper arm 2 and the lower arm 3 through nuts respectively.

Referring to fig. 2 and 3, in order to facilitate the connection of the lower pressing frame 4 with the upper arm 2 and improve the structural strength, a third connecting shaft 25 is erected between the two mounting holes 21, and the lower pressing frame 4 is hinged on the third connecting shaft 25.

To sum up, the utility model relates to a pushing down force adjustment mechanism for agricultural machine can solve the inconvenient problem of agricultural machine pushing down force adjustment such as seeding, so, the utility model discloses thereby some actual problems of effectively having overcome among the prior art have very high use value and use meaning.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be modified in many ways without departing from the spirit and scope of the present invention, and those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a down force adjustment mechanism for agricultural machine, includes holder (1), the right side of holder (1) be equipped with agricultural machine complex couple (11), articulated on holder (1) have two to the left side extend upper arm (2) and two lower arm (3), its characterized in that: the two upper arms (2) are provided with a pair of mounting holes (21) with corresponding positions and a pair of long holes (22) with corresponding positions from right to left, and the two long holes (22) are opened along the length direction of the upper arms and are provided with position-adjustable limiting shafts (23); a connecting rod (31) positioned on the right side of the long hole (22) is connected between the two lower arms (3); a lower pressing frame (4) is mounted on the two upper arms (2), the lower pressing frame (4) is provided with two vertical plates (41) which extend downwards and are parallel, the middle positions of the two vertical plates (41) are respectively hinged and matched with the two mounting holes (21), the right sides of the two vertical plates (41) extend towards the left lower side to form inclined holes (411) with corresponding positions, the left sides of the two inclined holes (411) are respectively provided with a plurality of pairs of clamping grooves (412) with corresponding positions, and the limiting shaft (23) can be clamped into any pair of the clamping grooves (412); still include an at least extension spring (5), the one end of extension spring (5) is connected push down frame (4) left side, the other end is connected on connecting rod (31).

2. A down pressure adjusting mechanism for an agricultural machine, according to claim 1, wherein: the lower pressing frame (4) comprises a main plate (42), and the two vertical plates (41) are vertically fixed on the main plate (42).

3. A down pressure adjusting mechanism for an agricultural machine, according to claim 1, wherein: a hanging shaft (43) is erected between the two vertical plates (41), and one end of the tension spring (5) is connected to the hanging shaft (43) in a hanging mode.

4. A down pressure adjusting mechanism for an agricultural machine, according to claim 1, wherein: a first connecting shaft (24) is erected between the two upper arms (2), and the two upper arms are hinged to the clamping piece (1) through the first connecting shaft (24).

5. A down pressure adjusting mechanism for an agricultural machine, according to claim 1, wherein: a second connecting shaft (32) is erected between the two lower arms (3), and the two lower arms are hinged to the clamping piece (1) through the second connecting shaft (32).

6. A down pressure adjusting mechanism for an agricultural machine, according to claim 1, wherein: a third connecting shaft (25) is erected between the two mounting holes (21), and the lower pressing frame (4) is hinged to the third connecting shaft (25).