Digital power shift control valve for agricultural machinery

Abstract

The utility model discloses a kind of digital power gear shifting control valve of agricultural machinery, for shifting by movable shift lever insertion into the pilot valve spool of follow-up oil cylinder of continuously variable transmission, comprising: driving mechanism, variable line mechanism, valve stem, shift lever and first shell;The driving mechanism and variable line mechanism are located in one end of first shell, the valve stem is arranged in the first shell and can be translated and slid, the shift lever is vertically detachably fixed on the valve stem, wherein, first recess is arranged on the outer side of shift lever on first shell, the valve stem can slide in first recess.It is beneficial to effect: by the control of driving mechanism, shift lever can be quickly translated and moved by electrical control, by shift lever insertion into the pilot valve spool inside follow-up oil cylinder in control continuously variable transmission, and then accurate and quick electrical switching gear position can be carried out by shift lever.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery shifting, and in particular to a digital power shifting control valve for agricultural machinery. Background Technology

[0002] Agricultural machinery is characterized by its speed, efficiency, and labor-saving features, and is widely used in agricultural production such as tilling and weeding. However, agricultural production covers not only plains, but also complex terrains such as mountainous areas and orchards, where large agricultural machinery designed for plains cannot operate. To adapt to agricultural operations in complex terrain areas, small agricultural machinery (such as mini tillers) has emerged.

[0003] The existing agricultural machinery gear shifting is done manually, which makes it difficult to accurately control the shift position and easily causes shifting delays. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to solve the problems in the prior art and provide a digital power shift control valve for agricultural machinery.

[0005] Technical solution: A digital power shift control valve for agricultural machinery is proposed, used for shifting gears by inserting a movable lever into the pilot valve core of the follower cylinder of a continuously variable transmission (CVT), comprising:

[0006] Drive mechanism, changeover mechanism, valve stem, lever, and first housing;

[0007] The drive mechanism and the reversing mechanism are located at one end of the first housing. The valve stem is located inside the first housing and can slide horizontally. The lever is vertically and detachably fixed to the valve stem. The first housing is provided with a first groove on the outside of the lever, and the valve stem can slide within the first groove.

[0008] The drive mechanism is connected to the valve stem via a variable cable, so that the valve stem drives the lever to slide horizontally.

[0009] Preferably, a second outer shell is fixed to one end of the first outer shell by a first bolt, and a third outer shell is fixed to the other end of the first outer shell by a second bolt. The valve stem can extend through the first outer shell to the second and third outer shells respectively.

[0010] The second housing has a second groove inside, and a first spring is connected to the outer side of one end of the valve stem. The other end of the first spring is connected to one end of the second groove.

[0011] The third housing has a third groove, and a second spring is connected to the outer side of the other end of the valve stem. The other end of the second spring is connected to one end of the third groove through a limiting member.

[0012] Preferably, the limiting component includes a first screw, a rotating ring, and a first nut;

[0013] The first screw passes through one side wall of the third housing by thread, the first nut is located on the outside of the third housing and is threaded onto the outside of the first screw, the rotating ring is located inside the third housing and is fixed to the outside of the first screw, and one end of the second spring is fixedly connected to the rotating ring.

[0014] Preferably, the valve stem is hollow inside, and air holes are provided at both ends and the middle position to allow the first groove, the second groove and the third groove to communicate.

[0015] Preferably, the drive mechanism includes a motor housing and a stepper motor;

[0016] The motor housing is fixed to one side of the second housing and communicates with the second housing;

[0017] The stepper motor is fixed inside the motor housing, and the output end of the stepper motor is connected to the cable-changing mechanism.

[0018] Preferably, the reversing mechanism includes a threaded sleeve and a second screw;

[0019] The output end of the stepper motor is connected to the threaded sleeve. The second screw is threaded inside the threaded sleeve. One end of the second screw is connected to a sliding member. One end of the valve stem is connected to a fixing block. The sliding member is provided with a limiting groove for placing the fixing block.

[0020] Preferably, a limiting shell is sleeved on the outer side of the slider, the two sides of the slider are planar structures, and the limiting shell is in contact with the outer surface of the slider;

[0021] The outer side of the limiting shell is connected to the motor shell through a support member.

[0022] Preferably, the upper end of the lever is connected to a fixing rod, which is inserted through the bottom of the valve stem and extends through the top of the valve stem. A bearing is sleeved on the outside of the fixing rod, and the outer ring of the bearing abuts against the valve stem through a washer. A second nut is threaded on the outside of the fixing rod to abut against the inner ring of the bearing.

[0023] Preferably, the upper end of the first housing is provided with an operating port, and the upper end of the first housing is fixed with a cover plate for closing the operating port by bolts. Beneficial effects

[0024] By controlling the drive mechanism, the lever can be moved quickly and electrically. The lever is inserted into the pilot valve core of the follower cylinder in the continuously variable transmission, thus enabling accurate and rapid electrical gear switching. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a top view of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the internal three-dimensional structure of this utility model;

[0028] Figure 4 This is a utility model Figure 2 Schematic diagram of the three-dimensional structure at position AA in the middle;

[0029] Figure 5 This is a utility model Figure 2 Schematic diagram of the cross-sectional structure at position AA.

[0030] Figure label:

[0031] 1. Drive mechanism; 2. Cable changing mechanism; 3. Valve stem; 4. Toggle lever; 5. First housing; 6. First groove; 7. Second housing; 8. Third housing; 9. Second groove; 10. First spring; 11. Second spring; 12. Third groove; 13. First screw; 14. Rotating ring; 15. Second nut; 16. Threaded sleeve; 17. Motor housing; 18. Stepper motor; 19. Air hole; 20. Sliding component; 21. Fixing block; 22. Limiting groove; 23. Limiting housing; 24. Fixing rod; 25. Bearing; 26. Operating port; 27. Cover plate; 28. Controller; 29. ​​Second screw; 30. Second nut. Detailed Implementation

[0032] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0033] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but does not exclude other elements or objects.

[0035] In response to the problems existing in the current technology, combined with Figure 1-5 A digital power shift control valve for agricultural machinery, used for shifting gears by inserting a movable lever 4 into the pilot valve core of the follower cylinder of a continuously variable transmission, comprising:

[0036] Drive mechanism 1, changeover mechanism 2, valve stem 3, lever 4, and first housing 5;

[0037] The drive mechanism 1 and the change mechanism 2 are located at one end of the first housing 5. The valve stem 3 is located inside the first housing 5 and can slide horizontally. The lever 4 is vertically and detachably fixed to the valve stem 3. The first housing 5 is provided with a first groove 6 located on the outside of the lever 4. The valve stem 3 can slide within the first groove 6.

[0038] The drive mechanism 1 is connected to the valve stem 3 via a variable cable, so that the valve stem 3 drives the lever 4 to slide horizontally.

[0039] Specifically, in some embodiments, a controller 28 connected to the drive mechanism 1 is also included. The controller 28 obtains a shift signal to control the rotation of the drive mechanism 1, and then the valve stem 3 is translated through the changeover mechanism 2. The translation of the valve stem 3 drives the pilot valve core of the continuously variable transmission's follower cylinder to move to perform gear shifting. For example, when the lever 4 moves more than 1 mm to the left, the forward gear engages and the vehicle (agricultural machinery) begins to move forward. The continuously variable gear increment is proportional to the distance the lever 4 moves to the left. When the lever 4 moves more than 1 mm to the right, the reverse gear engages and the vehicle (agricultural machinery) begins to reverse. The continuously variable gear increment is proportional to the distance the lever 4 moves to the right.

[0040] In some specific embodiments, a second outer shell 7 is fixed to one end of the first outer shell 5 by a first bolt, and a third outer shell 8 is fixed to the other end of the first outer shell 5 by a second bolt. The valve stem 3 can extend through the first outer shell 5 to the second outer shell 7 and the third outer shell 8 respectively.

[0041] The second outer casing 7 has a second groove 9 inside, and a first spring 10 is connected to the outer side of one end of the valve stem 3. The other end of the first spring 10 is connected to one end of the second groove 9.

[0042] The third outer casing 8 is provided with a third groove 12, and a second spring 11 is connected to the outer side of the other end of the valve stem 3. The other end of the second spring 11 is connected to one end of the third groove 12 through a limiting member.

[0043] Specifically, when the drive mechanism 1 is set to the neutral position, due to the existence of the safety clearance, the first spring 10 and the second spring 11 enable the lever 4 to be in the center position within the first groove 6.

[0044] In some specific embodiments, the limiting member includes a first screw 13, a rotating ring 14, and a first nut 15;

[0045] The first screw 13 passes through one side wall of the third housing 8 by thread. The first nut 15 is located on the outside of the third housing 8 and is threaded onto the outside of the first screw 13. The rotating ring 14 is located inside the third housing 8 and is fixed to the outside of the first screw 13. One end of the second spring 11 is fixedly connected to the rotating ring 14.

[0046] Specifically, in neutral, the lever 4 needs to be in the middle of the first groove 6. However, due to the initial assembly or long-term use, it is easy to become out of center. Therefore, by loosening the first nut 15 and turning the first screw 13 (with an internal hexagonal groove) to rotate, the first screw 13 will slide and move, which will cause the rotating ring 14 to rotate and move simultaneously. This will cause the first spring 10 and the second spring 11 to be squeezed or stretched. With the existence of a safety gap, the horizontal movement position of the lever 4 can be finely adjusted.

[0047] In some specific embodiments, the valve stem 3 is hollow inside, and air holes 19 are provided at both ends and the middle position to connect the first groove 6, the second groove 9 and the third groove 12.

[0048] Specifically, the presence of the vent 19 prevents pressure imbalances from occurring when the valve stem 3 moves.

[0049] In some specific embodiments, the drive mechanism 1 includes a motor housing 17 and a stepper motor 18;

[0050] The motor housing 17 is fixed to one side of the second housing 7 and is in communication with the second housing 7;

[0051] The stepper motor 18 is fixed inside the motor housing 17, and the output end of the stepper motor 18 is connected to the cable changer 2.

[0052] Specifically, the rotation of the stepper motor 18, in conjunction with the transformation mechanism, drives the valve stem 3 to move horizontally.

[0053] In some specific embodiments, the reversing mechanism 2 includes a threaded sleeve 16 and a second screw 29;

[0054] The output end of the stepper motor 18 is connected to the threaded sleeve 16. The second screw 29 is threaded inside the threaded sleeve 16. One end of the second screw 29 is connected to a sliding member 20. One end of the valve stem 3 is connected to a fixing block 21. The sliding member 20 is provided with a limiting groove 22 for placing the fixing block 21. The limiting groove 22 is provided with a safety gap that allows the fixing block to slide within the limiting groove.

[0055] Specifically, the stepper motor 18 can drive the threaded sleeve 16 to rotate. Since the second screw 29 does not rotate, the rotation of the threaded sleeve 16 causes the second screw 29 to move horizontally. The movement of the second screw 29 drives the sliding member 20 to move, which in turn drives the fixed block 21 in the limiting groove 22 to slide horizontally, thereby driving the valve stem 3 to move.

[0056] The safety clearance provides redundancy in movement control, preventing overly sensitive operation.

[0057] In some specific embodiments, a limiting shell 23 is sleeved on the outer side of the slider 20, the two sides of the slider 20 are planar structures, and the limiting shell 23 is in contact with the outer surface of the slider 20;

[0058] The outer side of the limiting housing 23 is connected to the motor housing 17 via a support member.

[0059] Specifically, it facilitates the sliding member 20 to slide stably and without rotation within the limiting housing 23.

[0060] In some specific embodiments, the upper end of the lever 4 is connected to a fixing rod 24, which is inserted through the bottom of the valve stem 3 and extends through the top of the valve stem 3. A bearing 25 is sleeved on the outside of the fixing rod 24, and the outer ring of the bearing 25 abuts against the valve stem 3 through a washer. A second nut 30 is threaded on the outside of the fixing rod 24 and abuts against the inner ring of the bearing 25.

[0061] Specifically, it facilitates the installation and removal of the lever 4 by unscrewing the second nut 30, making it easy to remove the bearing 25 and remove the lever 4 from the lower part of the valve stem 3.

[0062] In some specific embodiments, the upper end of the first housing 5 is provided with an operation port 26, and the upper end of the first housing 5 is fixed with a cover plate 27 for closing the operation port 26 by bolts.

[0063] Specifically, it facilitates the installation and removal of the lever 4 through the operating port 26 when the cover plate 27 is removed.

[0064] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A digital power shift control valve for agricultural machinery, used for shifting gears by inserting a movable lever (4) into the pilot valve core of the follower cylinder of a continuously variable transmission, characterized in that, include: Drive mechanism (1), changeover mechanism (2), valve stem (3), lever (4) and first housing (5); The drive mechanism (1) and the changeover mechanism (2) are located at one end of the first housing (5). The valve stem (3) is located inside the first housing (5) and can slide horizontally. The lever (4) is vertically and detachably fixed to the valve stem (3). The first housing (5) is provided with a first groove (6) located outside the lever (4). The valve stem (3) can slide within the first groove (6). The drive mechanism (1) is connected to the valve stem (3) by a change of line so that the valve stem (3) drives the lever (4) to slide horizontally.

2. The agricultural machinery digital power shift control valve according to claim 1, characterized in that, One end of the first housing (5) is fixed with a second housing (7) by a first bolt, and the other end of the first housing (5) is fixed with a third housing (8) by a second bolt. The valve stem (3) can penetrate the first housing (5) and extend to the second housing (7) and the third housing (8) respectively. The second outer shell (7) is provided with a second groove (9), and a first spring (10) is connected to the outer side of one end of the valve stem (3). The other end of the first spring (10) is connected to one end of the second groove (9). The third outer shell (8) is provided with a third groove (12), and a second spring (11) is connected to the outer side of the other end of the valve stem (3). The other end of the second spring (11) is connected to one end of the third groove (12) through a limiting member.

3. The agricultural machinery digital power shift control valve according to claim 2, characterized in that, The limiting component includes a first screw (13), a rotating ring (14), and a first nut (15); The first screw (13) passes through one side wall of the third housing (8) by thread. The first nut (15) is located on the outside of the third housing (8) and is threaded on the outside of the first screw (13). The rotating ring (14) is located inside the third housing (8) and is fixed on the outside of the first screw (13). One end of the second spring (11) is fixedly connected to the rotating ring (14).

4. The agricultural machinery digital power shift control valve according to claim 1, characterized in that, The valve stem (3) is hollow inside, and air holes (19) are provided at both ends and the middle to connect the first groove (6), the second groove (9) and the third groove (12).

5. The agricultural machinery digital power shift control valve according to claim 2, characterized in that, The drive mechanism (1) includes a motor housing (17) and a stepper motor (18). The motor housing (17) is fixed to one side of the second housing (7) and communicates with the second housing (7); The stepper motor (18) is fixed inside the motor housing (17), and the output end of the stepper motor (18) is connected to the cable changer (2).

6. The agricultural machinery digital power shift control valve according to claim 5, characterized in that, The reversing mechanism (2) includes a threaded sleeve (16) and a second screw (29). The output end of the stepper motor (18) is connected to the threaded sleeve (16). The second screw (29) is threaded inside the threaded sleeve (16). One end of the second screw (29) is connected to a sliding member (20). One end of the valve stem (3) is connected to a fixing block (21). The sliding member (20) is provided with a limiting groove (22) for placing the fixing block (21). The limiting groove (22) is provided with a safety gap that allows the fixing block (21) to slide within the limiting groove (22).

7. The agricultural machinery digital power shift control valve according to claim 6, characterized in that, The sliding member (20) is fitted with a limiting shell (23) on its outer side. The two sides of the sliding member (20) are planar structures, and the limiting shell (23) is in contact with the outer surface of the sliding member (20). The outer side of the limiting shell (23) is connected to the motor shell (17) through a support member.

8. The agricultural machinery digital power shift control valve according to claim 1, characterized in that, The upper end of the lever (4) is connected to a fixing rod (24). The fixing rod (24) is inserted through the bottom of the valve stem (3) and extends through the top of the valve stem (3). A bearing (25) is sleeved on the outside of the fixing rod (24). The outer ring of the bearing (25) abuts against the valve stem (3) through a washer. A second nut (30) is threaded on the outside of the fixing rod (24) and abuts against the inner ring of the bearing (25).

9. The agricultural machinery digital power shift control valve according to claim 1, characterized in that, The upper end of the first housing (5) is provided with an operation port (26), and the upper end of the first housing (5) is provided with a cover plate (27) for closing the operation port (26) by bolts.

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