Steering and parking device of harvester

Abstract

The invention relates to the technical field of harvester steering and parking, in particular to a harvester steering and parking device which comprises a gearbox and a driving gear shaft in transmission connection with the gearbox and further comprises two inward pushing mechanisms and two locking mechanisms. Under the action of the inward pushing mechanism and the locking mechanism, in the rotating process of the steering shifting fork shaft, the inward pushing mechanism drives the locking mechanism to swing, if friction force cannot completely lock the driving gear shaft, and after the locking mechanism abuts against a sleeve, the driving gear shaft can continue to drive the driving gear shaft to rotate; the locking mechanism can be connected with the sleeve in a clamped mode, the driving gear shafts are locked, in other words, one driving gear shaft can be locked according to the abrasion condition of the brake pad, and therefore the harvester can be steered and parked.

Description

Technical Field

[0001] The invention relates to the technical field of harvester steering and parking, and in particular to a harvester steering and parking device. Background Art

[0002] When the harvester is turning and parking, it needs to be controlled by the gearbox. By locking one of the drive gear shafts, one drive wheel can be locked, so that the other rotating drive wheel rotates with it as the center of the circle. Parking requires the brake pads on both sides to work at the same time, so that the two drive wheels are locked to achieve the parking effect, but long-term use will cause the brake pads to wear and eventually fail. When waiting for accessories, you need to wait for two to three days for express delivery. However, during the busy farming season, harvesters are often not enough for farmers to use. If they are shut down for two or three days, the crops will not be fully harvested when the rainy day comes, causing the crops to mold and the farmers' hard work for a year to go to waste. And users who buy harvesters also need to make a profit in these few days. Therefore, a harvester steering and parking device can automatically increase the resistance of the brake pad according to the wear of the brake pad, and lock one of the drive gear shafts so that the harvester can turn and park. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a harvester steering and parking device, which can automatically increase the resistance of the brake pads according to the wear of the brake pads and lock one of the driving gear shafts to enable the harvester to steer and park.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the present invention provides a harvester steering parking device, including a gearbox and a driving gear shaft connected to the gearbox, a rotatable idler wheel and a steering clutch are arranged in the gearbox, the idler wheel is connected to the driving gear shaft through the transmission gear shaft, the steering clutch is connected to the idler wheel, the steering clutch is provided with two rotatable steering fork shafts and two steering gears that can slide horizontally, characterized in that it also includes two inner push mechanisms and two locking mechanisms, the inner push mechanism is connected to the steering fork shaft, and the inner push mechanism is used to push the locking mechanism toward The gearbox moves toward the transmission housing, and a sleeve for driving the gear shaft to rotate is provided on the outer shell of the transmission housing, and the sleeve is used to engage and lock with the locking mechanism; before the steering fork shaft rotates, the steering clutch does not work, the steering fork shaft maintains the initial position, and the locking mechanism is not engaged with the sleeve; after the steering fork shaft rotates, the steering gear slides outward, the steering fork shaft drives the inner push mechanism to rotate, and the inner push mechanism pushes the locking mechanism to move toward the sleeve; when the steering gear conflicts with the brake pad, one side of the locking mechanism is flush with the end of the sleeve; when the steering gear and the brake pad are over-squeezed, the locking mechanism is engaged with the sleeve.

[0005] Preferably, the steering clutch includes two unilateral brakes, each of which includes a steering gear, a rotating shaft, a shift fork, a return spring and a plurality of stacked brake pads. The rotating shaft is rotatably connected to the gearbox housing, and the steering gear can be installed on the steering rotating shaft in a horizontally slidable manner. The outer edge of the brake pad is fixedly connected to the gearbox housing, and the inner edge of the brake pad is slidably connected to the outer edge of the steering gear. The return spring is used to provide an elastic force to the steering gear toward the middle of the gearbox housing. A driving gear is fixedly provided in the middle of the rotating shaft, and blocks that are engaged with two slots are provided on both sides of the driving gear. A slot for the block to be engaged is provided on the inner side of the steering gear, and the shift fork is rotatably connected to the annular groove, and the shift fork is fixedly connected to the steering fork shaft; when the slot is completely separated from the block, the steering gear is not squeezed by the brake pad.

[0006] Preferably, each locking mechanism comprises a collar, a resistance spring, an annular clamping plate, a swivel and a retaining ring, the collar can be installed on the driving gear shaft in a horizontally slidable manner, a plurality of clamping strips 1 are fixedly arranged on the outer edge of the driving gear shaft, a clamping groove 2 is provided on the inner edge of the collar, the clamping strip 1 is inserted into the clamping groove 2, the annular clamping plate is fixedly installed on the left side of the collar, the retaining ring is fixedly installed on the right side of the collar, the swivel can be installed on the collar in a horizontally slidable manner, the resistance spring is sleeved on the collar, the collar is used to apply an elastic force to the swivel away from the annular clamping plate, a plurality of clamping strips 2 are fixedly arranged on the outer edge of the sleeve, a clamping groove 3 is provided on the inner edge of the annular clamping plate, and the swivel is rotatably connected to the inner push mechanism; when the steering gear conflicts with the brake pad, one side end face of the annular clamping plate is flush with the end face of the sleeve; when the steering gear and the brake pad are over-extruded, the annular clamping plate is sleeved in the sleeve.

[0007] Preferably, each inner push mechanism includes two rotating rods, two rotating sleeves and a connecting plate. One end of the two rotating rods is fixedly connected to the upper and lower ends of the steering fork shaft, and the other end of the rotating rod is slidably connected to the rotating sleeve. The two rotating sleeves are respectively located on the upper and lower sides of the driving gear shaft. The connecting plate is fixedly connected to the two rotating sleeves. The upper and lower sides of the rotating ring are fixedly provided with rotating shafts, and the rotating sleeves are rotatably connected to the rotating shafts.

[0008] Preferably, a secondary friction mechanism is provided on the outer edge of the sleeve, and the secondary friction mechanism can be installed on the sleeve so as to be horizontally movable and adjustable. The inner side surfaces of the secondary friction mechanism and the annular clamping plate are both rough surface structures. When the secondary friction mechanism and the annular clamping plate are required to contact and rub against each other, the end face of the secondary friction mechanism is located between the sleeve and the annular clamping plate.

[0009] Preferably, the secondary friction mechanism includes a friction block and a screw, which is meshed and installed on the friction block. The friction block is provided with a threaded hole for the screw to pass through and meshedly connect. The sleeve is provided with a fixed clamping hole and a working clamping hole. The inner side of the secondary friction mechanism is provided with a clamping groove three for clamping with the clamping strip two. When the secondary friction mechanism is required to contact and rub with the annular clamping plate, the end of the screw is inserted into the working clamping hole. When the secondary friction mechanism is not required to contact and rub with the annular clamping plate, the end of the screw is inserted into the fixed clamping hole.

[0010] Preferably, an annular groove is provided on the steering gear, the shift fork is a shaped structure, both ends of the shift fork are fixedly connected to the steering fork shaft, and two plug posts are fixedly provided at the end of the shift fork, and the plug posts are inserted in the annular groove.

[0011] Preferably, an annular step is provided on the outer edge of the steering gear, and an extrusion ring is provided on the side of the steering gear close to the brake pad, the inner edge of the extrusion ring is in contact with the outer edge of the steering gear, and one side of the extrusion ring is in contact with the brake pad.

[0012] The beneficial effect of the present invention is that when the multiple brake pads of the harvester steering and parking device are worn and thinned, the inner push mechanism and the locking mechanism are used to drive the locking mechanism to swing during the rotation of the steering fork shaft. If the friction force cannot completely lock the driving gear shaft, after the locking mechanism and the sleeve are in conflict, if the driving gear shaft can continue to drive the driving gear shaft to rotate, the locking mechanism and the sleeve can be clamped to lock the driving gear shaft. That is, one of the driving gear shafts can be locked according to the wear of the brake pads, so that the harvester can be steered and parked.

[0013] If multiple brake pads fail completely, the secondary friction mechanism is removed and the resistance spring is used to create extrusion between the annular clamping plate and the secondary friction mechanism, thereby frictionally locking the drive gear shaft and automatically increasing the resistance of the brake pads, allowing the harvester to turn and avoiding the need to wait for accessories during busy farming seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the steering clutch.

[0018] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure decomposition.

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention without the gearbox housing.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the drive gear shaft and the locking mechanism in the exploded state.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the sleeve and the secondary friction mechanism in the exploded state.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. driving gear shaft; 1a. clamping strip one; 2. idler gear; 4. steering clutch; 4a. steering gear; 4a1. clamping groove one; 4a2. ring groove; 4b. brake pad; 4c. steering fork shaft; 4d. rotating shaft; 4e. shift fork; 4f. return spring; 4h. driving gear; 4h1. clamping block; 4j. plug column; 4s. extrusion ring; 5. gearbox housing; 5a. sleeve; 5b. clamping strip two; 5c. fixed clamping hole; 5d. working clamping hole; 6. inner push mechanism; 6a. rotating rod; 6b. rotating sleeve; 6c. connecting plate; 7. locking mechanism; 7a. sleeve; 7a1. clamping groove two; 7b. resistance spring; 7c. annular clamping plate; 7c1. clamping groove three; 7d. swivel; 7e. retaining ring; 7h. rotating shaft; 8. transmission gear shaft; 9. secondary friction mechanism; 9a. friction block; 9b. screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment: The present invention provides a harvester steering parking device, such as Figure 1-2As shown, it includes a gearbox and a driving gear shaft 1 that is transmission-connected to the gearbox, an idler wheel 2 and a steering clutch 4 that can rotate are arranged in the gearbox, the idler wheel 2 is transmission-connected to the driving gear shaft 1 through a transmission gear shaft 8, the steering clutch 4 is transmission-connected to the idler wheel 2, and the steering clutch 4 is provided with two steering fork shafts 4c that can rotate and two steering gears 4a that can slide horizontally, and is characterized in that it also includes two inner pushing mechanisms 6 and two locking mechanisms 7, the inner pushing mechanism 6 is transmission-connected to the steering fork shaft 4c, the inner pushing mechanism 6 is used to push the locking mechanism 7 to move toward the gearbox housing 5, and a sleeve 5a for rotating the driving gear shaft 1 is arranged on the outer shell of the gearbox housing 5, and the sleeve 5a is used to be clamped and locked with the locking mechanism 7; Before the steering fork shaft 4c rotates, the steering clutch 4 does not work, the steering fork shaft 4c maintains the initial position, and the locking mechanism 7 is not engaged with the sleeve 5a; the steering fork shaft 4c will be able to rotate, so that the steering gear 4a drives the driving gear shaft 1 to rotate through the action of the idler wheel 2 and the transmission gear shaft 8, and the driving gear shaft 1 can drive the walking wheel to move, thereby driving the harvester forward.

[0025] When the steering fork shaft 4c rotates, the steering gear 4a slides outward, and the steering fork shaft 4c drives the inner push mechanism 6 to rotate, and the inner push mechanism 6 pushes the locking mechanism 7 to move toward the sleeve 5a; that is, the movement of the steering gear 4a and the movement of the locking mechanism 7 are carried out simultaneously. If the steering gear 4a is pushed to the preset position and is found to still be unable to be locked with the driving gear shaft 1, then the locking mechanism 7 needs to be quickly supplemented with the engagement with the sleeve 5a to achieve the locking of the driving gear shaft 1.

[0026] The preset position is the position where the driving gear shaft 1 can stop when the steering gear 4a and the brake pad 4b are pressed against each other.

[0027] When the steering gear 4a contacts the brake pad 4b, one side of the locking mechanism 7 is flush with the end of the sleeve 5a. If the driving gear shaft 1 cannot rotate, it is in a locked state at this time, and there is no need to continue to rotate the steering fork shaft 4c; the user can judge whether the driving gear shaft 1 can rotate by the turning radius of the harvester when operating the harvester. When turning, if the amplitude of the harvester's movement is significantly increased, it means that the driving gear shaft 1 is not locked. At this time, the user will definitely continue to operate the rotating steering fork shaft 4c.

[0028] There are many ways to rotate the steering fork shaft 4c, which are all recorded in the prior art. The steering fork shaft 4c can be rotated by a cylinder driving a cam connected to the steering fork shaft 4c, or by a brake line pulling the steering fork shaft 4c to rotate. How to drive the steering fork shaft 4c to rotate is not the main point of the invention and will not be described here.

[0029] If excessive wear occurs between multiple brake pads 4b, the stacked thickness of the multiple brake pads 4b will become thinner, so that when the steering gear 4a and the brake pad 4b come into contact with each other, the driving gear shaft 1 can still rotate. At this time, the steering gear 4a and the brake pad 4b need to be excessively squeezed to achieve the locking of the driving gear shaft 1 in a superimposed combination of friction force and clamping force. When the steering gear 4a and the brake pad 4b are excessively squeezed, the locking mechanism 7 is inserted into the sleeve 5a. At this time, the driving gear shaft 1 and the gearbox housing 5 are in a locked state. Since the gearbox housing 5 is fixed to the vehicle body, the driving gear shaft 1 cannot rotate, thereby achieving complete locking of the single-sided tire.

[0030] Among them, the design point that needs to be explained is that when multiple stacked brake pads 4b are worn and thinned, the change is small, and because the inner push mechanism 6 rotates, the movement amplitude is amplified, so that the locking mechanism 7 can be engaged with the sleeve 5a, and the engagement distance is deeper.

[0031] like Figure 2-4 As shown, the steering clutch 4 includes two unilateral brakes, each of which includes a steering gear 4a, a rotating shaft 4d, a shift fork 4e, a return spring 4f and a plurality of stacked brake pads 4b, the rotating shaft 4d is rotatably connected to the gearbox housing 5, the steering gear 4a is mounted on the steering rotating shaft 4d in a horizontally slidable manner, the outer edge of the brake pad 4b is fixedly connected to the gearbox housing 5, the inner edge of the brake pad 4b is slidably connected to the outer edge of the steering gear 4a, and the return spring 4f is used to provide the steering gear 4a with a direction toward the gearbox housing 5. The elastic force in the middle part, one end of the return spring 4f contacts the gearbox housing 5, and the other end of the return spring 4f contacts 4a. A slot hole for embedding the return spring 4f is provided in the middle part of 4a. A driving gear 4h is fixedly provided in the middle part of the rotating shaft 4d. Blocks 4h1 engaging with two slots 4a1 are provided on both sides of the driving gear 4h. A slot 4a1 for engaging the block 4h1 is provided on the inner side of the steering gear 4a. The shift fork 4e is rotatably connected with the annular groove 4a2, and the shift fork 4e is fixedly connected with the steering fork shaft 4c. When the card slot 1 4a1 and the card block 4h1 are completely separated, the steering gear 4a is not pressed against the brake pad 4b. Therefore, within one second of separation, the vehicle needs to be decelerated in the direction where the mud exerts resistance. Then, the steering gear 4a slides horizontally, so that the steering gear 4a is pressed against the brake pad 4b to decelerate.

[0032] After the steering fork shaft 4c is pushed to rotate, the steering fork shaft 4c will drive the fork 4e to rotate, so that the fork 4e pushes the steering gear 4a to slide horizontally along the steering fork shaft 4c, and after the separation between the card slot 1 4a1 and the card block 4h1, the power of the driving gear 4h will not be transmitted to the steering gear 4a, so that the steering gear 4a will not rotate, and then the braking process can be realized by squeezing between the steering gear 4a and the brake pad 4b. When the user releases the rotation control of the steering fork shaft 4c, the brake pad 4b will push 4a to reset, and after the end of 4a contacts the card block 4h1, the driving gear 4h continues to rotate, that is, the card block 4h1 is connected with the card slot 1 4a1, so that the gearbox can continue to drive the driving gear shaft 1 to rotate, and the harvester moves forward while rotating in place.

[0033] like Figure 6 As shown, each locking mechanism 7 includes a collar 7a, a resisting spring 7b, an annular clamping plate 7c, a swivel 7d and a retaining ring 7e. The collar 7a can be horizontally slidably mounted on the driving gear shaft 1. A plurality of clamping strips 1a are fixedly arranged on the outer edge of the driving gear shaft 1. A clamping groove 2 7a1 is provided on the inner edge of the collar 7a. The clamping strip 1a is inserted into the clamping groove 2 7a1. The annular clamping plate 7c is fixedly mounted on the left side of the collar 7a. The retaining ring 7e is fixedly mounted on the right side of the collar 7a. The swivel 7d is fixedly mounted on the right side of the collar 7a. d is installed on the collar 7a so as to slide horizontally, the resistance spring 7b is sleeved on the collar 7a, the collar 7a is used to apply elastic force to the swivel 7d away from the annular clamping plate 7c, one end of the resistance spring 7b is in contact with the annular clamping plate 7c, and the other end of the resistance spring 7b is in contact with the swivel 7d, a plurality of clamping strips 5b are fixedly arranged on the outer edge of the sleeve 5a, a clamping groove 7c1 is provided on the inner edge of the annular clamping plate 7c to be clamped with the clamping strips 5b, and the swivel 7d is rotatably connected with the inner push mechanism 6; When the steering gear 4a contacts the brake pad 4b, one end surface of the annular clamping plate 7c is flush with the end surface of the sleeve 5a; When the steering gear 4a and the brake pad 4b are over-extended, the annular clamping plate 7c is sleeved in the sleeve 5a. When the driving gear shaft 1 rotates, the driving gear shaft 1 can drive the collar 7a to rotate through the clamping strip 1a, and the collar 7a is connected with the rotating ring 7d to ensure that the collar 7a can rotate under the connection of the inner pushing mechanism 6. When it is necessary to lock the driving gear shaft 1 and the gearbox housing 5, the inner pushing mechanism 6 is used to push horizontally, and the inner pushing mechanism 6 will push the annular clamping plate 7c to move horizontally, so that the collar 7a slides horizontally along the driving gear shaft 1. When the end of the annular clamping plate 7c conflicts with the sleeve 5a, since the clamping strip 2 5b cannot be exactly connected with the clamping groove 3 7c1, the clamping strip 2 5b is pushed through the rotating ring 7d, and the conflict spring 7b is compressed. In the process of the driving gear shaft 1 continuing to rotate, the clamping strip 2 5b is connected with the clamping groove 3 7c1. If the driving gear shaft 1 does not rotate, it means that the driving gear shaft 1 has been locked by the brake function.

[0034] like Figure 5 As shown, each inner push mechanism 6 includes two rotating rods 6a, two rotating sleeves 6b and a connecting plate 6c. One end of the two rotating rods 6a is fixedly connected to the upper and lower ends of the steering fork shaft 4c, and the other end of the rotating rod 6a is slidably connected to the rotating sleeve 6b. The two rotating sleeves 6b are respectively located on the upper and lower sides of the driving gear shaft 1. The connecting plate 6c is fixedly connected to the two rotating sleeves 6b. The upper and lower sides of the rotating ring 7d are fixedly provided with a rotating shaft 7h, and the rotating sleeve 6b is rotatably connected to the rotating shaft 7h. When the steering fork shaft 4c drives the fork 4e to rotate, the steering fork shaft 4c will also drive the rotating rod 6a to rotate, and the rotating rod 6a will drive the rotating sleeve 6b to rotate, so that the rotating sleeve 6b can push the rotating shaft 7h to move along the axis of the driving gear shaft 1. In the process of rotating the rotating rod 6a, the rotating sleeve 6b and the rotating rod 6a will slide and separate. The structural rigidity between the two rotating sleeves 6b is increased by the connecting plate 6c.

[0035] Among them, there is a probability of complete failure due to the friction between the multiple brake pads 4b. If the locking mechanism 7 is directly used for locking, the friction between the driving gear shaft 1 and the gearbox housing 5 will increase, which will cause the gearbox housing 5 to be deformed. At this time, the locking mechanism 7 cannot be used for clamping. For this reason, Figure 7As shown, a secondary friction mechanism 9 is arranged on the outer edge of the sleeve 5a, and the secondary friction mechanism 9 can be installed on the sleeve 5a in a horizontally movable and adjustable manner. The inner side surfaces of the secondary friction mechanism 9 and the annular clamping plate 7c are both rough surface structures. When the secondary friction mechanism 9 is required to contact and rub with the annular clamping plate 7c, the end surface of the secondary friction mechanism 9 is located between the sleeve 5a and the annular clamping plate 7c, so that the secondary friction mechanism 9 contacts the annular clamping plate 7c before the sleeve 5a. This can prevent the driving gear shaft 1 from rotating by contacting and rubbing with the annular clamping plate 7c itself, and if the torque of the driving gear shaft 1 rotating is large, the driving gear shaft 1 can also rotate, because the torque is greater than the friction force, avoiding the gearbox housing 5 from being deformed. In addition, the magnitude of the friction force can be controlled by the degree of compression of the resisting spring 7b by the rotating ring 7d.

[0036] like Figure 7 As shown, the secondary friction mechanism 9 includes a friction block 9a and a screw 9b, the screw 9b is meshed and installed on the friction block 9a, the friction block 9a is provided with a threaded hole for the screw 9b to penetrate and meshedly connect, the sleeve 5a is provided with a fixing clamping hole 5c and a working clamping hole 5d, and the inner side of the secondary friction mechanism 9 is provided with a clamping groove 3 for clamping with the clamping strip 2 5b, and the connection between the secondary friction mechanism 9 and the sleeve 5a is made tighter through the clamping groove 3. When the secondary friction mechanism 9 is required to contact and rub with the annular clamping plate 7c, the end of the screw 9b is inserted into the working clamping hole 5d, and when the secondary friction mechanism 9 is not required to contact and rub with the annular clamping plate 7c, the end of the screw 9b is inserted into the fixing clamping hole 5c, and the secondary friction mechanism 9 is retracted at this time, and when the annular clamping plate 7c is clamped with the clamping strip 2 5b, the end of the annular clamping plate 7c will not contact with the secondary friction mechanism 9.

[0037] like Figure 4 As shown, the steering gear 4a is provided with an annular groove 4a2, the fork 4e is a U-shaped structure, both ends of the fork 4e are fixedly connected to the steering fork shaft 4c, and two plug posts 4j are fixedly provided at the end of the fork 4e, and the plug posts 4j are inserted in the annular groove 4a2. When the steering fork shaft 4c drives the fork 4e to rotate, the fork 4e will push the steering gear 4a to slide horizontally through the plug posts 4j, and before the steering gear 4a is pushed, the steering gear 4a can rotate relative to the plug posts 4j.

[0038] like Figure 2 and Figure 3 As shown, an annular step is provided on the outer edge of the steering gear 4a, and a squeeze ring 4s is provided on the side of the steering gear 4a close to the brake pad 4b, the inner edge of the squeeze ring 4s is in contact with the outer edge of the steering gear 4a, and one side of the squeeze ring 4s is in contact with the brake pad 4b. The squeeze ring 4s increases the squeeze area, so that the pressure applied by the squeeze ring 4s to the brake pad 4b can be dispersed more evenly, and the friction failure time is longer.

[0039] When in use, when the harvester needs to turn, the steering fork shaft 4c at the corresponding position is rotated to lock the driving gear shaft 1 at the corresponding position, while the other driving gear shaft 1 continues to rotate, so that the rotatable wheel rotates along the locked wheel. If parking is required, the two steering fork shafts 4c are rotated at the same time to lock the two driving gear shafts 1.

[0040] When the wheel needs to be locked, the steering fork shaft 4c rotates, which drives the fork 4e to swing, so that the extrusion ring 4s and the brake pad 4b are squeezed, that is, the steering gear 4a is locked, and the corresponding driving gear shaft 1 is locked.

[0041] During long-term use, the multiple brake pads 4b will wear and become thinner, making it impossible for the friction force to completely lock the drive gear shaft 1. At this time, through the action of the inner push mechanism 6 and the locking mechanism 7, during the rotation of the steering fork shaft 4c, the inner push mechanism 6 drives the locking mechanism 7 to swing. If the friction force cannot completely lock the drive gear shaft 1, after the locking mechanism 7 conflicts with the sleeve 5a, if the drive gear shaft 1 can continue to drive the drive gear shaft 1 to rotate, the locking mechanism 7 can be engaged with the sleeve 5a, so that the drive gear shaft 1 is locked.

[0042] If multiple brake pads 4b fail completely, the secondary friction mechanism 9 is moved out, and the annular clamping plate 7c and the secondary friction mechanism 9 are squeezed by the resistance spring 7b, thereby achieving the effect of friction locking the drive gear shaft 1, allowing the harvester to turn and avoiding the time for the harvester to wait for accessories during busy farming seasons.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A harvester steering parking device, comprising a gearbox and a driving gear shaft (1) connected to the gearbox, wherein a rotatable idler wheel (2) and a steering clutch (4) are arranged in the gearbox, wherein the idler wheel (2) is connected to the driving gear shaft (1) via a transmission gear shaft (8), and the steering clutch (4) is connected to the idler wheel (2), wherein the steering clutch (4) is provided with two rotatable steering fork shafts (4c) and two horizontally slidable steering gears (4a), wherein: It also includes two inner push mechanisms (6) and two locking mechanisms (7), the inner push mechanism (6) being in driving connection with the steering fork shaft (4c), the inner push mechanism (6) being used to push the locking mechanism (7) to move toward the gearbox housing (5), the outer shell of the gearbox housing (5) being provided with a sleeve (5a) for driving the gear shaft (1) to rotate, the sleeve (5a) being used to be locked with the locking mechanism (7); When the steering fork shaft (4c) is not rotating, the steering clutch (4) is not working, the steering fork shaft (4c) maintains an initial position, and the locking mechanism (7) is not engaged with the sleeve (5a); When the steering fork shaft (4c) rotates, the steering gear (4a) slides outward, the steering fork shaft (4c) drives the inner push mechanism (6) to rotate, and the inner push mechanism (6) pushes the locking mechanism (7) to move toward the sleeve (5a); When the steering gear (4a) and the brake pad (4b) collide with each other, one side of the locking mechanism (7) is flush with the end of the sleeve (5a); when the steering gear (4a) and the brake pad (4b) are over-pressed, the locking mechanism (7) is inserted into the sleeve (5a).

2. A harvester steering parking device as claimed in claim 1, characterized in that: The steering clutch (4) comprises two single-sided brakes, each of which comprises a steering gear (4a), a rotating shaft (4d), a shift fork (4e), a return spring (4f) and a plurality of stacked brake pads (4b), the rotating shaft (4d) being rotationally connected to a gearbox housing (5), the steering gear (4a) being mounted on the steering rotating shaft (4d) in a horizontally slidable manner, the outer edge of the brake pad (4b) being fixedly connected to the gearbox housing (5), and the inner edge of the brake pad (4b) being slidably connected to the outer edge of the steering gear (4a). The return spring (4f) is used to provide an elastic force for the steering gear (4a) toward the middle of the gearbox housing (5); a driving gear (4h) is fixedly arranged in the middle of the rotating shaft (4d); blocks (4h1) that are engaged with two engaging grooves (4a1) are arranged on both sides of the driving gear (4h); a engaging groove (4a1) for the engaging block (4h1) to be engaged is provided on the inner side of the steering gear (4a); a shift fork (4e) is rotationally connected to the annular groove (4a2); and the shift fork (4e) is fixedly connected to the steering fork shaft (4c); When the first clamping groove (4a1) and the clamping block (4h1) are completely separated, the steering gear (4a) is not pressed against the brake pad (4b).

3. A harvester steering parking device as claimed in claim 2, characterized in that: Each locking mechanism (7) comprises a collar (7a), a resisting spring (7b), an annular clamping plate (7c), a rotating ring (7d) and a retaining ring (7e); the collar (7a) is mounted on the driving gear shaft (1) in a horizontally slidable manner; a plurality of clamping strips (1a) are fixedly arranged on the outer edge of the driving gear shaft (1); a clamping groove (7a1) is provided on the inner edge of the collar (7a); the clamping strip (1a) is inserted into the clamping groove (7a1); the annular clamping plate (7c) is fixedly mounted on the left side of the collar (7a); and the retaining ring (7e) is fixedly mounted on the left side of the collar (7a); and the retaining ring (7e) is fixedly mounted on the left side of the collar (7a). 7e) is fixedly installed on the right side of the collar (7a), the rotating ring (7d) can be installed on the collar (7a) in a horizontally slidable manner, the resistance spring (7b) is sleeved on the collar (7a), the collar (7a) is used to apply an elastic force to the rotating ring (7d) away from the annular clamping plate (7c), a plurality of clamping strips (5b) are fixedly arranged on the outer edge of the sleeve (5a), a clamping groove (7c1) that is clamped with the clamping strips (5b) is provided on the inner edge of the annular clamping plate (7c), and the rotating ring (7d) is rotatably connected to the inner push mechanism (6); When the steering gear (4a) and the brake pad (4b) come into contact, an end surface of one side of the annular clamping plate (7c) is flush with an end surface of the sleeve (5a); When the steering gear (4a) and the brake pad (4b) are over-compressed, the annular clamping plate (7c) is sleeved in the sleeve (5a).

4. A harvester steering parking device as claimed in claim 3, characterized in that: Each inner push mechanism (6) comprises two rotating rods (6a), two rotating sleeves (6b) and a connecting plate (6c); one end of the two rotating rods (6a) is fixedly connected to the upper and lower ends of the steering fork shaft (4c); the other end of the rotating rod (6a) is slidably connected to the rotating sleeve (6b); the two rotating sleeves (6b) are respectively located on the upper and lower sides of the driving gear shaft (1); the connecting plate (6c) is fixedly connected to the two rotating sleeves (6b); the upper and lower sides of the rotating ring (7d) are fixedly provided with rotating shafts (7h); the rotating sleeve (6b) is rotatably connected to the rotating shaft (7h).

5. A harvester steering parking device as claimed in claim 4, characterized in that: A secondary friction mechanism (9) is arranged on the outer edge of the sleeve (5a); the secondary friction mechanism (9) is mounted on the sleeve (5a) so as to be horizontally movable and adjustable; the inner side surfaces of the secondary friction mechanism (9) and the annular clamping plate (7c) are both rough surface structures; when the secondary friction mechanism (9) and the annular clamping plate (7c) are required to contact and rub against each other, the end surface of the secondary friction mechanism (9) is located between the sleeve (5a) and the annular clamping plate (7c).

6. A harvester steering parking device as claimed in claim 5, characterized in that: The secondary friction mechanism (9) comprises a friction block (9a) and a screw (9b), wherein the screw (9b) is meshedly mounted on the friction block (9a), a threaded hole for the screw (9b) to penetrate and meshingly connect is provided on the friction block (9a), a fixing clamping hole (5c) and a working clamping hole (5d) are provided on the sleeve (5a), a clamping groove (3) for clamping with a clamping strip (5b) is provided on the inner side of the secondary friction mechanism (9), when the secondary friction mechanism (9) is required to contact and rub with the annular clamping plate (7c), the end of the screw (9b) is inserted into the working clamping hole (5d), and when the secondary friction mechanism (9) is not required to contact and rub with the annular clamping plate (7c), the end of the screw (9b) is inserted into the fixing clamping hole (5c).

7. A harvester steering parking device as claimed in claim 6, characterized in that: An annular groove (4a2) is provided on the steering gear (4a); the shift fork (4e) is a U-shaped structure; both ends of the shift fork (4e) are fixedly connected to the steering fork shaft (4c); two plug posts (4j) are fixedly provided at the end of the shift fork (4e); the plug posts (4j) are inserted into the annular groove (4a2).

8. A harvester steering and parking device as claimed in claim 7, characterized in that: An annular step is provided on the outer edge of the steering gear (4a), and an extrusion ring (4s) is provided on a side of the steering gear (4a) close to the brake pad (4b), the inner edge of the extrusion ring (4s) is in contact with the outer edge of the steering gear (4a), and one side of the extrusion ring (4s) is in contact with the brake pad (4b).

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