A return mechanism, ground wheel steering system and harvester

Abstract

The present application discloses a return mechanism and a ground wheel steering system and a harvester, comprising a return mechanism, a support body and a vehicle body, a mechanical transmission mechanism is provided on one side of the support body, the output ends of the mechanical transmission mechanism on both sides are respectively hinged to the two sides of the support body, and the output ends of the mechanical transmission mechanism are connected to the ground wheels; the mechanical transmission mechanism is connected to a driving source and a return mechanism, the driving source is used to drive the mechanical transmission mechanism to be linked, the return mechanism is used to drive the ground wheels to return, and the ground wheel steering system is provided on the vehicle body; the present invention solves the problem that the traditional steering system needs to be directly connected to the steering wheel, and the steering wheel needs to be manually operated when the wheel (ground wheel) is returned.

Description

Technical Field

[0001] This invention relates to the field of ground wheel steering technology, specifically to a return mechanism, a ground wheel steering system, and a harvester. Background Technology

[0002] The steering system is a series of devices used to change or maintain the direction of a car's movement, whether forward or backward. The function of the steering system is to control the direction of the car according to the driver's wishes. The steering system is crucial to the driving safety of a car, so the parts of the steering system are called safety components.

[0003] Currently, the input end of the steering system is usually directly connected to the steering wheel, and the output end of the steering system is usually directly connected to the wheel (ground wheel). For example, CN111516748A, published in the patent library, discloses a steering system and a vehicle, in which the steering system is connected to the steering wheel and the wheel (ground wheel) respectively. When the wheel (ground wheel) deviates, if the steering system is used to straighten the wheel (ground wheel), the steering wheel still needs to be manually operated to transmit power to the steering system. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a return mechanism, a ground wheel steering system, and a harvester, which solves the problem that traditional steering systems need to be directly connected to the steering wheel, and that manual operation of the steering wheel is still required when the wheels (ground wheels) are returning to center.

[0005] In a first aspect, the present invention discloses a return mechanism, comprising two or more proximity switches, the proximity switches being detachably connected to a mounting base, the mounting base being connected to a support steel of a mechanical transmission mechanism; an adjustment plate is provided below the proximity switches, the adjustment plate being connected to a yoke shaft seat of the mechanical transmission mechanism; when the adjustment plate is in the center position of the proximity switches, the detection light of the proximity switches is located on the periphery of the adjustment plate and does not illuminate the adjustment plate; when the detection light of the proximity switches intersects with the adjustment plate, the adjustment plate moves away from the detection light of the proximity switches.

[0006] As a further optimization of the return mechanism: two proximity switches are detachably connected to both sides of the placement base, and the overall shape of the adjustment plate is scalloped; when the center line of the adjustment plate is in the center position of the two proximity switches, the detection light of the two proximity switches corresponds to the groove area on both sides of the adjustment plate.

[0007] Secondly, the present invention discloses a ground wheel steering system, including a return mechanism and a support body. A mechanical transmission mechanism is provided on one side of the support body. The output ends of the mechanical transmission mechanism are respectively hinged to the two sides of the support body. A ground wheel is connected to the output end of the mechanical transmission mechanism. A drive source and a return mechanism are connected to the mechanical transmission mechanism. The drive source is used to drive the mechanical transmission mechanism to perform linkage, and the return mechanism is used to drive the ground wheel to return to center.

[0008] As a further definition of the mechanical transmission mechanism: the mechanical transmission mechanism includes two pull rods, which are respectively connected to the two output ends of the drive source, and the other end of the pull rod is hinged to a rotating shaft; the rotating shaft is fixed to the steering horn shaft seat; the steering horn shaft seat is rotatably connected to the support body, and a ground wheel is connected to the steering horn shaft seat.

[0009] As a further definition of the drive source: the drive source includes a steering cylinder, which has two cylinder cores that move in the same direction within the steering cylinder; and each cylinder core has a tie rod hinged to its end.

[0010] As a further definition of the support body: the support body includes a shaft steel and a protective steel, the protective steel contains the shaft steel, and the shaft steel and the protective steel are rotatably connected on one side; the other side of the protective steel is connected to a lifting cylinder, and the cylinder core of the lifting cylinder is connected to the shaft steel through a hinge; the support body is provided with a support steel and a mounting base for connection with the harvester.

[0011] As a further definition of the hinge: the hinge includes a connecting sleeve, the connecting sleeve is hinged to the cylinder core of the lifting cylinder, and the other end of the connecting sleeve is hinged to the shaft steel.

[0012] As a further optimization of the ground wheel steering system, the ground wheel steering system also includes a limiting component, which includes two limiting plates connected to both sides of the guard steel. The tail ends of the two limiting plates extend to the bottom of the axle steel, and a stop shaft is connected between the tail ends of the two limiting plates.

[0013] Thirdly, the present invention discloses a harvester, including a ground wheel steering system and a vehicle body, wherein the ground wheel steering system is disposed on the vehicle body.

[0014] The beneficial effects of this invention are as follows:

[0015] First, this application combines a self-aligning mechanism to replace the traditional method of human brain reaction and manual operation with a new mechanical and automatic self-aligning method. After the ground wheel deflects, the self-aligning mechanism can make the ground wheel perform a self-aligning action in a timely manner, which greatly improves work efficiency. On the other hand, the traditional manual self-aligning method may result in the ground wheel not being aligned properly. The self-aligning mechanism of this application can effectively avoid this shortcoming. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the return mechanism.

[0017] Figure 2 This is a diagram showing the usage status of the return mechanism.

[0018] Figure 3 This is a three-dimensional structural diagram of the ground wheel steering system.

[0019] Figure 4This is a three-dimensional structural diagram of a mechanical transmission mechanism.

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the support.

[0021] Figure 6 This is a schematic diagram of the assembly structure of the connecting sleeve and the small shaft head.

[0022] Figure 7 This is a partial structural diagram of the ground wheel steering system.

[0023] Figure 8 This is a schematic diagram of the limiting component.

[0024] Figure 9 This is a schematic diagram of the installation structure of the protective plate, protective cover, and retaining plate.

[0025] In the diagram, the components are: proximity switch 1, placement seat 2, arc groove 3, adjusting plate 4, support body 5, shaft steel 501, guard steel 502, positioning pin 503, lifting cylinder 504, support steel 505, mounting seat 506, vertical shaft seat sleeve 507, mechanical transmission mechanism 6, pull rod 601, universal clamp 602, ball joint rod 603, rotating shaft 604, yoke shaft seat 605, ground wheel 7, drive source 8, steering cylinder 801, hinge ear 802, connecting sleeve 9, limit plate 10, stop shaft 11, protective plate 12, protective cover 13, and retaining plate 14. Implementation

[0026] To clearly understand the technical solution of this application, the following will describe in detail a return mechanism, ground wheel steering system and harvester provided by this application in conjunction with specific embodiments and accompanying drawings.

[0027] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two.

[0028] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "one embodiment," "some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Example

[0029] This embodiment provides a return-to-center mechanism, referencing... Figure 1 The diagram shows the assembly structure of the return mechanism. As can be seen from the diagram, it includes two proximity switches 1 (existing products available on the market, which will not be described in detail here). The two proximity switches 1 are set on the left and right sides of the placement base 2. The placement base 2 has an arc-shaped groove 3. Each proximity switch 1 has a double nut threaded on its surface. The gap between the double nuts forms a sliding connection with the arc-shaped groove 3. When the double nuts move closer to each other, the gap between the double nuts narrows, and the narrowed gap locks the arc-shaped groove 3. One end of the placement base 2 is used to weld to the fixed end of the mechanical transmission mechanism 6 (the fixed end will not shift with the rotation of the ground wheel 7, for example, the placement base 2 is connected to the support steel 505 on the mechanical transmission mechanism 6).

[0030] See also Figure 1 Below the two proximity switches 1, there is an adjustment plate 4. The protruding part of the adjustment plate 4 is fan-shaped, and the locking part of the adjustment plate 4 is circular. The overall shape of the adjustment plate 4 is scallop-shaped. When the center line of the adjustment plate 4 is in the center position of the two proximity switches 1, the detection light of the two proximity switches 1 corresponds to the groove area on both sides of the adjustment plate 4. The arc groove 3 on the placement seat 2 is opposite to the fan-shaped protruding part of the adjustment plate 4, and the two ends of the arc groove 3 extend beyond the fan-shaped protruding part. After the model of the adjustment plate 4 is changed, the fan-shaped protruding part also changes accordingly. At this time, by moving the position of the proximity switch 1 in the arc groove 3, the proximity switch 1 continues to be opposite to the groove of the adjustment plate 4. The other end of the adjustment plate 4 is used to connect to the moving end of the mechanical transmission mechanism 6 (the moving end will be offset as the ground wheel 7 rotates, for example, the adjustment plate 4 is connected to the horn shaft seat 605 of the mechanical transmission mechanism 6).

[0031] Working principle of the return mechanism: (Refer to) Figure 2The diagram shows the operating state of the return mechanism. As can be seen from the diagram, after the ground wheel 7 deflects, firstly, the controller (PLC) activates the two proximity switches 1, which emit two beams of light (direction a1 or a2). Then, once one of the beams is blocked by the upper surface of the adjusting plate 4, the proximity switch 1 will promptly transmit a signal to the controller. The controller then controls the mechanical transmission mechanism 6 to drive the adjusting plate 4 to deflect in the direction of the other beam (direction b1 or b2). Finally, until the adjusting plate 4 is centered between the two beams, at which point neither beam intersects with the adjusting plate 4, the proximity switch 1 transmits a signal to the controller again. The controller then stops the adjusting plate 4 by stopping the mechanical transmission mechanism 6 and simultaneously closes the proximity switch 1.

[0032] This application combines a self-aligning mechanism to replace the traditional method of human brain reaction and manual operation with a new mechanical and automatic self-aligning method. After the ground wheel 7 deflects, the self-aligning mechanism can make the ground wheel 7 perform a self-aligning action in a timely manner, which greatly improves work efficiency. On the other hand, the traditional manual self-aligning method may result in the ground wheel 7 not being aligned properly. The self-aligning mechanism of this application can effectively avoid this drawback. Example

[0033] This embodiment provides a wheel steering system, referencing... Figure 3 The diagram shows a three-dimensional structural schematic of the ground wheel steering system. As can be seen from the diagram, the ground wheel steering system includes a support body 5 (reference). Figure 5 (A three-dimensional structural schematic diagram of the support body 5 is shown). A mechanical transmission mechanism 6 is provided on the front side of the support body 5. The output ends of the mechanical transmission mechanism 6 are respectively hinged to the left and right sides of the support body 5. A ground wheel 7 is connected to the output end of the mechanical transmission mechanism 6. A drive source 8 is connected to the mechanical transmission mechanism 6. The drive source 8 drives the two output ends to deflect, and the ground wheel 7 rotates under the drive of the output ends. A return mechanism is provided on the mechanical transmission mechanism 6. The return mechanism is used to drive the ground wheel 7 to return to the center after deflection.

[0034] Among them, reference Figure 4 The diagram shows a three-dimensional view of the mechanical transmission mechanism 6. As can be seen from the diagram, the mechanical transmission mechanism 6 includes two pull rods 601, which are respectively connected to the two output ends of the drive source 8. The other end of the pull rods 601 forms a universal clamp 602, and a ball joint rod 603 is hinged to the universal clamp 602. A rotating shaft 604 is rotatably connected to the other end of the ball joint rod 603. The rotating shaft 604 is fixed to the horn shaft seat 605 by bolts. A bearing is connected to the horn shaft seat 605, and the bearing is used to form a rotatable connection with the upright shaft seat sleeve 507 on the support body 5. A ground wheel 7 is also connected to the horn shaft seat 605.

[0035] See also Figure 4The drive source 8 includes a steering cylinder 801, which has two cylinder cores that move in the same direction within the steering cylinder 801. The ends of the two cylinder cores are provided with hinge ears 802, which are hinged to the pull rod 601 at the nearest end.

[0036] Working principle of mechanical transmission mechanism 6 and drive source 8: Taking the right turn of ground wheel 7 as an example, see... Figure 4 First, the steering cylinder 801 is activated, and the two cylinder cores on the steering cylinder 801 move to the left simultaneously (along the e1 and e2 directions); then, the two cylinder cores drive the corresponding tie rods 601 to move to the left, and the moving tie rods 601 push the rotating shaft 604 and the steering horn shaft seat 605 to rotate to the right (note: at this time, the support body 5 is required for auxiliary limitation); finally, the ground wheel 7 completes the right turn under the drive of the steering horn shaft seat 605.

[0037] For details, see Figure 5 The support body 5 includes a shaft steel 501 and a guard steel 502. The guard steel 502 is U-shaped, and the shaft steel 501 is placed in the U-shaped groove of the guard steel 502. The shaft steel 501 and the guard steel 502 are rotatably connected on one side by a positioning pin 503. A lifting cylinder 504 is connected to the other side of the guard steel 502, and the cylinder core of the lifting cylinder 504 is connected to the shaft steel 501 by a hinge. Support steel 505 and mounting base 506 are welded to both the left and right sides of the support body 5. The support steel 505 and mounting base 506 are used to connect with the connecting parts on the harvester. As an optimization option, to avoid a dead angle of rotation when the lifting cylinder 504 on the guard steel 502 pushes the shaft steel 501, therefore, refer to... Figure 6 The figure shows a schematic diagram of the assembly structure of the connecting sleeve 9 and the small shaft head. As can be seen from the figure, the hinged part includes the connecting sleeve 9, which is hinged to the cylinder core of the lifting cylinder 504, and the other end of the connecting sleeve 9 is hinged to the shaft steel 501.

[0038] The support 5 of this invention not only provides load-bearing support for other structures, but also, driven by the lifting cylinder 504, allows the shaft steel 501 and the guard steel 502 to separate. The raised guard steel 502 can then indirectly lift one side of the harvester's undercarriage (see...). Figure 5 The machine is pushed along direction c and rotated along direction d, which helps to avoid obstacles. On the other hand, the lifting action of the support body 5 on the bottom of the harvester and the steering action of the mechanical transmission mechanism 6 on the ground wheels 7 of the harvester work together to ensure that the harvester can move smoothly in the field.

[0039] For details, please refer to Figure 7 The figure shows a partial structural diagram of the ground wheel steering system. As can be seen from the figure, the placement seat 2 is connected to the support steel 505, and the adjusting plate 4 is connected to the steering wheel axle seat 605.

[0040] Furthermore, to prevent excessive separation of the shaft steel 501 from the protective steel 502, this invention designs a limiting component; see reference. Figure 8 The diagram shows a schematic of the limiting component. As can be seen from the diagram, the limiting component includes two limiting plates 10, which are connected to both sides of the guard steel 502. The tail ends of the two limiting plates 10 extend to the bottom of the shaft steel 501, and a stop shaft 11 is connected between the tail ends of the two limiting plates 10.

[0041] Furthermore, during harvester use, in order to reduce damage to the return mechanism, drive source 8, and lifting cylinder 504 caused by mud, refer to... Figure 9 The diagram shows the installation structure of the protective plate 12, the protective cover 13, and the retaining plate 14. As can be seen from the diagram, the protective plate 12 is provided above the return mechanism, the protective cover 13 is provided outside the cylinder core of the lifting cylinder 504, and the retaining plate 14 is provided on one side of the steering cylinder 801. Example

[0042] This embodiment provides a harvester, model 4TL-4, which includes the return mechanism and ground wheel steering system mentioned in Embodiments 1 and 2, and also includes a vehicle body, with the ground wheel steering system located on the vehicle body.

Claims

1. A ground wheel steering system, characterized in that: The invention comprises a return mechanism and a support body (5), wherein a mechanical transmission mechanism (6) is provided on one side of the support body (5), and output ends on both sides of the mechanical transmission mechanism (6) are respectively hinged to the two sides of the support body (5), and the output ends of the mechanical transmission mechanism (6) are connected to a ground wheel (7); a driving source (8) and a return mechanism are connected to the mechanical transmission mechanism (6), the driving source (8) is used to drive the mechanical transmission mechanism (6) to perform linkage, and the return mechanism is used to drive the ground wheel (7) to perform return; the return mechanism comprises more than two proximity switches (1), the proximity switches (1) are detachably connected to a placement seat (2), and the placement seat (2) is used to be connected to a support steel (505) of the mechanical transmission mechanism (6); an adjustment plate (4) is provided below the proximity switch (1) ), the adjustment plate (4) is used to be connected to the ram-horn shaft seat (605) of the mechanical transmission mechanism (6); when the adjustment plate (4) is in the center position of the proximity switch (1), the detection light of the proximity switch (1) is located on the peripheral side of the adjustment plate (4) and is not irradiated on the adjustment plate (4); when the detection light of the proximity switch (1) intersects with the adjustment plate (4), the adjustment plate (4) moves to the side away from the detection light of the proximity switch (1); the two sides of the placement seat (2) are detachably connected with the two proximity switches (1), and the overall shape of the adjustment plate (4) is scallop-shaped; when the center line of the adjustment plate (4) is in the center position of the two proximity switches (1), the detection light of the two proximity switches (1) corresponds to the groove area on both sides of the adjustment plate (4).

2. The ground wheel steering system according to claim 1, characterized in that: The mechanical transmission mechanism (6) comprises two pull rods (601), the two pull rods (601) are respectively connected to the two output ends of the driving source (8), and the other end of the pull rod (601) is hinged with a rotating shaft (604); the rotating shaft (604) is fixed to a ram's horn shaft seat (605); the ram's horn shaft seat (605) is transfer-connected to the support body (5), and the ram's horn shaft seat (605) is connected to a ground wheel (7).

3. The ground wheel steering system according to claim 2, characterized in that: The driving source (8) comprises a steering oil cylinder (801), on which two cylinder cores are provided, and the two cylinder cores move in the same direction in the steering oil cylinder (801); and the ends of the two cylinder cores are both hinged with pull rods (601).

4. The ground wheel steering system according to claim 1, characterized in that: The support body (5) comprises an axle steel (501) and a guard steel (502), wherein the axle steel (501) is arranged inside the guard steel (502), and one side of the axle steel (501) and the guard steel (502) are rotatably connected; the other side of the guard steel (502) is connected to a lifting cylinder (504), and the cylinder core of the lifting cylinder (504) is connected to the axle steel (501) via a hinge; and the support body (55) and a mounting seat (506) for connecting to a harvester are arranged on the support body (55).

5. The ground wheel steering system according to claim 4, characterized in that: The hinged component comprises a connecting sleeve (9), the connecting sleeve (9) is hingedly connected to the cylinder core of the lifting oil cylinder (504), and the other end of the connecting sleeve (9) is hingedly connected to the shaft steel (501).

6. The ground wheel steering system according to claim 4, characterized in that: It also includes a limiting component, wherein the limiting component includes two limiting plates (10), the two limiting plates (10) are connected to two sides of the guard steel (502), the rear ends of the two limiting plates (10) extend to below the shaft steel (501), and a stop shaft (11) is connected between the rear ends of the two limiting plates (10).

7. A harvester, characterized in that: The invention comprises the ground wheel steering system as claimed in claim 1, and also comprises a vehicle body, wherein the ground wheel steering system is arranged on the vehicle body.

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