Harvester feeding safety protection device and method

Abstract

The invention relates to a harvester feeding safety protection device and method.The harvester feeding safety protection device comprises an input pressing disc, a middle pressing disc, a movable pressing disc, an overload steel ball, a first disc spring, a return plate spring, a positioning disc and a middle shaft, and the middle shaft is sequentially sleeved with the input pressing disc, the middle pressing disc, the movable pressing disc, the positioning disc and the first disc spring; the return plate spring sleeves the outer side of the positioning disc and elastically clamps and limits the positioning disc and the movable pressing disc; the input pressure plate is circumferentially and movably connected with the intermediate shaft, the intermediate pressure plate is fixedly connected with the intermediate shaft, the movable pressure plate is movably connected with the intermediate shaft, the positioning plate is axially and movably connected with the intermediate shaft, and the first disc spring is limited on one side of the positioning plate; a plurality of clamping ball sockets are arranged on the side face, close to the middle pressing disc, of the input pressing disc, a plurality of ball passing channels are formed in the middle pressing disc, a plurality of overload ball sockets are arranged on the movable pressing disc, every two adjacent overload ball sockets are communicated through a first arc-shaped ball socket, and the depth of each first arc-shaped ball socket is smaller than that of each overload ball socket.

Description

TECHNICAL FIELD

[0001] The present application relates to the harvesting machine related technical field, specifically to a kind of harvesting machine feeding safety protection device and method. BACKGROUND

[0002] At present, safety clutch is a kind of clutch widely used in mechanical field, and its main function is to protect the overload of working parts. There are many types of safety clutches on the market, mainly including friction plate type, sliding pin type, toothed type and steel ball type, and most of the existing clutches only have overload protection function, and have large heat generation, easy to burn, low service life and single function. Moreover, the existing clutch has serious wear on parts, and the cost of replacing parts is high, time-consuming and laborious, which is not conducive to work safety. In addition, with the expansion of the market of forage harvesting machinery, the safety clutch with only overload protection function cannot avoid that metal objects such as iron wire and iron rod enter the harvester with straw, and a new safety clutch is urgently needed to stop the metal objects from entering the harvester in emergency to avoid the mixing of metal objects in forage. SUMMARY

[0003] The present application provides a kind of harvesting machine feeding safety protection device and method to solve one or several technical problems existing in the prior art.

[0004] The technical scheme for solving the above technical problems is as follows: a kind of harvesting machine feeding safety protection device, including input pressure disc, intermediate pressure disc, movable pressure disc, overload steel ball, first disc spring, return plate spring, positioning disc and intermediate shaft, the input pressure disc, intermediate pressure disc, movable pressure disc, positioning disc and first disc spring are sequentially sleeved on the intermediate shaft, the return plate spring is sleeved on the outer side of the positioning disc and elastically clamped and positioned the positioning disc and movable pressure disc;The input pressure disc is circumferentially movably connected with the intermediate shaft, the intermediate pressure disc is fixedly connected with the intermediate shaft, the movable pressure disc is movably connected with the intermediate shaft, the positioning disc is movably connected with the intermediate shaft in the axial direction, and the first disc spring is limited on one side of the positioning disc;

[0005] The side surface of the input pressure disc close to the intermediate pressure disc is provided with a plurality of clamping ball sockets, the intermediate pressure disc is provided with a plurality of ball passing channels, the movable pressure disc is provided with a plurality of overload ball sockets, and the adjacent two overload ball sockets are communicated through a first arc-shaped ball socket, and the depth of the first arc-shaped ball socket is less than that of the overload ball socket;When working normally, the plurality of clamping ball sockets, the plurality of ball passing channels and the plurality of first arc-shaped ball sockets are one-to-one correspondingly arranged.

[0006] The beneficial effects of the present invention are as follows: the harvester feeding safety protection device of the present invention, by setting an input pressure plate, an intermediate pressure plate and a movable pressure plate, can make the overload steel ball enter the forward overload ball socket when overload or emergency braking occurs, so that the input pressure plate and the intermediate pressure plate are no longer connected, and the power is disconnected. Through the cooperation between each pressure plate and the overload steel ball, the entire clutch structure is stable and reliable, and the overload steel ball is not easily worn.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a first positioning platform is provided on the circumferential edge of the positioning plate, and a second positioning platform is provided on the side of the circumferential edge of the movable pressure plate that exceeds the preset distance of the positioning plate and the exceeding part. The second positioning platform and the first positioning platform are arranged correspondingly along the radial direction of the intermediate shaft, and the two ends of the return leaf spring are close to and limited on both sides of the first positioning platform and the second positioning platform.

[0009] The beneficial effect of adopting the above further solution is that by providing the first positioning platform and the second positioning platform, the two ends of the return leaf spring can elastically clamp and limit the movable pressure plate and the positioning plate, thereby facilitating subsequent return.

[0010] Furthermore, a limiting boss is provided on one side of the movable pressure plate close to the positioning plate, and a circular arc-shaped limiting groove is provided on the circumferential edge of the positioning plate. The circumferential length of the circular arc-shaped limiting groove is greater than the circumferential length of the limiting boss, and the limiting boss is located in the circular arc-shaped limiting groove.

[0011] The beneficial effect of adopting the above further solution is that the cooperation between the limiting boss and the arc-shaped limiting groove can prevent the movable pressure plate and the positioning plate from rotating too much relative to each other.

[0012] Furthermore, a supporting ball is provided between the movable pressure plate and the positioning plate;

[0013] Or / and, two adjacent positioning ball sockets are connected via a second arc-shaped ball socket.

[0014] The beneficial effect of adopting the above further solution is that the provision of the supporting balls makes the relative movement between the movable pressure plate and the positioning plate smoother.

[0015] Furthermore, a first limiting ring is fixed on the outer circumference of one end of the intermediate pressure plate close to the input pressure plate, and a first limiting step is provided on the outer circumference of one end of the input pressure plate close to the intermediate pressure plate, and the first limiting ring is movably sleeved on the first limiting step;

[0016] A second limiting ring is fixed on the outer circumference of one end of the movable pressure plate close to the intermediate pressure plate, and a second limiting step is provided on the outer circumference of one end of the intermediate pressure plate close to the movable pressure plate. The second limiting ring is movably sleeved on the second limiting step.

[0017] The beneficial effect of adopting the above further solution is that by providing a limiting ring and cooperating with the corresponding limiting step, the assembly between the various pressure plates is made more stable and compact.

[0018] Furthermore, the overload ball socket includes a forward rotation overload ball socket and a reverse rotation overload ball socket that are arranged adjacent to or partially overlapped.

[0019] Furthermore, the invention further comprises an emergency braking claw, a support and a driving unit, wherein the main structure of the driving unit is mounted on the support, one end of the emergency braking claw is hinged to the support via a hinge shaft, the central axis of the hinge shaft is arranged parallel to the central axis of the intermediate shaft; the braking end of the emergency braking claw is spaced apart from and corresponds to the peripheral side wall of the movable pressure plate and the peripheral side wall of the intermediate pressure plate, and the driving unit is connected to the emergency braking claw and drives the emergency braking claw to abut against the peripheral side wall of the movable pressure plate and the intermediate pressure plate;

[0020] A plurality of first braking teeth are provided on the outer peripheral side wall of the movable pressure plate, and a plurality of second braking teeth are provided on the outer peripheral side wall of the intermediate pressure plate; during normal operation, the plurality of first braking teeth and the plurality of second braking teeth are staggered.

[0021] The beneficial effect of adopting the above further solution is that by providing the emergency braking claw, the support and the driving part, the movable pressure plate and the intermediate pressure plate can be emergency braked in an emergency situation.

[0022] Furthermore, the driving portion includes a push rod, a driving end of the push rod is hinged to a side of the emergency braking claw away from the movable pressure plate, and the side of the emergency braking claw away from the movable pressure plate is also connected to a support via a return spring.

[0023] The beneficial effect of adopting the above further solution is that by providing a return spring, the return of the push rod after emergency braking is facilitated.

[0024] Furthermore, the emergency braking unit further includes a metal detection sensor and a controller, and the controller is electrically connected to the metal detection sensor and the driving unit respectively.

[0025] The beneficial effect of adopting the above further solution is that by providing a metal detection sensor and a controller, the metal detection sensor can be used to detect whether there is metal at the material feeding inlet to control whether the driving part is to operate.

[0026] Furthermore, a connecting arm is fixed on the support, the intermediate shaft is a hollow structure and is sleeved and fixed with an output shaft, and the free end of the connecting arm is rotatably connected to one end of the output shaft through a bearing.

[0027] The beneficial effect of adopting the above further solution is that the provision of the connecting arm can support the entire device and facilitate the layout of the positions of various components.

[0028] Furthermore, a guide column is provided on the support, the central axis of the guide column is perpendicular to the central axis of the hinge shaft, the free end of the guide column is movably sleeved with a guide frame, a second disc spring is provided between the guide frame and the support, and a buffer shaft arranged parallel to the hinge shaft is also provided on the connecting arm, and the hinge shaft and the buffer shaft are movably connected by a connecting rod.

[0029] The beneficial effect of adopting the above further solution is that by providing a second disc spring, a guide column and a guide frame, a buffering effect can be exerted on the entire device during emergency braking, which can reduce or avoid the impact caused by large loads during sudden emergency stops.

[0030] The present invention also provides a harvester feeding safety protection method, which is implemented using the harvester feeding safety protection device described above, and includes the following steps:

[0031] During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output;

[0032] During overload protection, the intermediate pressure plate reduces or stops rotating due to the overload speed of the equipment, and the input pressure plate continues to input power. The overload steel ball is squeezed out from the positioning ball socket under the action of the input pressure plate torsion, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released from the clamping, and overload protection is performed;

[0033] When the device returns to its original position and the overload protection is released, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the opposite direction, so that the positioning ball socket of the input pressure plate corresponds to the ball passing channel of the intermediate pressure plate, and under the elastic action of the return leaf spring, the movable pressure plate returns to the preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the overload ball socket, and then is locked into the positioning ball socket of the input pressure plate to return the device to its original position.

[0034] The beneficial effects of the present invention are as follows: the harvester feeding safety protection method of the present invention can perform overload protection when the output shaft encounters a load greater than the clutch torque, and can also return to its original position when the overloaded material is cleared.

[0035] The present invention also provides a harvester feeding safety protection method, which is implemented using the harvester feeding safety protection device described above, and includes the following steps:

[0036] During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output;

[0037] During the forward overload protection, the intermediate pressure plate reduces or stops rotating due to the overload speed of the equipment, and the input pressure plate continues to input power in the forward direction. The overload steel ball is squeezed out from the locking ball socket under the action of the torsion of the input pressure plate, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the forward overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released from the locking, and the forward overload protection is performed;

[0038] When the device returns to its original position, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the reverse direction, so that the locking ball socket of the input pressure plate corresponds to the ball passage of the intermediate pressure plate. Under the elastic action of the return leaf spring, the movable pressure plate returns to a preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the forward-rotating overload ball socket, and then locks into the locking ball socket of the input pressure plate to return the device to its original position.

[0039] During reverse overload protection, after the device returns to its position, the input pressure plate continues to rotate in the reverse direction to spit out the overloaded material. The intermediate pressure plate reduces or stops rotating due to the overload of the equipment, and the input pressure plate continues to input power in the reverse direction. The overload steel ball is squeezed out from the positioning ball socket under the action of the torque of the input pressure plate, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the reverse overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released to perform reverse overload protection.

[0040] The beneficial effect of the present invention is that the harvester feeding safety protection method of the present invention can perform reverse overload protection when the input shaft rotates in the reverse direction to spit out materials.

[0041] The present invention also provides a harvester feeding safety protection method, which is implemented using the harvester feeding safety protection device described above, and includes the following steps:

[0042] During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output;

[0043] When overload protection, the intermediate disc stops rotating due to the reduction of the rotating speed of the device overload, the input disc continues to input power, the overload ball is extruded from the clamping ball socket under the torsion of the input disc, and pushes the movable disc and the positioning disc to move axially, compresses the first disc spring, and at the same time, the movable disc rotates by a preset angle relative to the positioning disc, the overload ball enters the overload ball socket of the movable disc, the two ends of the return plate spring are opened by a preset angle, the input disc and the intermediate disc are disengaged, and overload protection is performed;

[0044] When the device returns after overload protection, after the overload condition is removed, the input disc reversely rotates under the reverse power transmitted by the input shaft, the clamping ball socket of the input disc corresponds to the ball passing channel of the intermediate disc, the movable disc is returned by a preset angle relative to the positioning disc under the elastic action of the return plate spring, the overload ball enters the first arc-shaped ball socket from the overload ball socket, and then is clamped into the clamping ball socket of the input disc, so that the device returns.

[0045] When emergency braking, the driving part drives the emergency braking claw to rotate around the hinge shaft and abuts against the peripheral side wall of the movable disc and the intermediate disc, the movable disc is first braked through the first braking tooth, the input disc and the intermediate disc continue to rotate by a certain angle, the input disc continues to input power, the overload ball is extruded from the clamping ball socket under the torsion of the input disc and enters the overload ball socket of the movable disc, and the input disc and the intermediate disc are disengaged; the intermediate disc is braked through the second braking tooth, the positioning disc rotates by a preset angle relative to the movable disc, the two ends of the return plate spring are opened by a preset angle, and emergency braking is performed.

[0046] When the device returns after emergency braking, after the emergency braking is removed, the input disc reversely rotates under the reverse power transmitted by the input shaft, the clamping ball socket of the input disc corresponds to the ball passing channel of the intermediate disc, the movable disc is returned by a preset angle relative to the positioning disc under the elastic action of the return plate spring, the overload ball enters the first arc-shaped ball socket from the overload ball socket, and then is clamped into the clamping ball socket of the input disc, so that the device returns.

[0047] The harvesting machine feeding safety protection method has the advantages that when the output shaft encounters a load greater than the torque of the clutch, overload protection can be performed, and the device can also be returned when the overload material is removed; and protection can also be performed when emergency braking. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a schematic of the three-dimensional structure of the movable disc of the application Figure 1 ;

[0049] Figure 2 It is a schematic of the three-dimensional structure of the movable disc of the application Figure 2 ;

[0050] Figure 3 Schematic diagram of the three-dimensional structure of the input pressure plate of the present invention;

[0051] Figure 4 Schematic diagram of the three-dimensional structure of the intermediate pressure plate of the present invention Figure 1 ;

[0052] Figure 5 Schematic diagram of the three-dimensional structure of the intermediate pressure plate of the present invention Figure 2 ;

[0053] Figure 6 This is a schematic diagram of the three-dimensional structure of the input pressure plate and the intermediate pressure plate of the present invention;

[0054] Figure 7 The three-dimensional structure diagram of the middle pressure plate and the movable pressure plate of the present invention is shown in FIG. Figure 1 ;

[0055] Figure 8 The three-dimensional structure diagram of the middle pressure plate and the movable pressure plate of the present invention is shown in FIG. Figure 2 ;

[0056] Figure 9 The three-dimensional structure diagram of the middle pressure plate and the movable pressure plate of the present invention is shown in FIG. Figure 3 ;

[0057] Figure 10 The three-dimensional structure diagram of the middle pressure plate, the movable pressure plate and the positioning plate of the present invention is shown in FIG. Figure 1 ;

[0058] Figure 11 The three-dimensional structure diagram of the middle pressure plate, the movable pressure plate and the positioning plate of the present invention is shown in FIG. Figure 2 ;

[0059] Figure 12 The three-dimensional structure diagram of the middle pressure plate, the movable pressure plate and the positioning plate of the present invention is shown in FIG. Figure 3 ;

[0060] Figure 13 This is a schematic cross-sectional view of an embodiment of a harvester feeding safety protection device of the present invention;

[0061] Figure 14 This is a schematic diagram of the three-dimensional structure of an embodiment of the harvester feeding safety protection device of the present invention;

[0062] Figure 15 This is a schematic diagram of the three-dimensional structure of another embodiment of the harvester feeding safety protection device of the present invention;

[0063] Figure 16 This is a schematic cross-sectional view of another embodiment of the harvester feeding safety protection device of the present invention;

[0064] Figure 17 This is a side structural schematic diagram of another embodiment of the harvester feeding safety protection device of the present invention.

[0065] In the accompanying drawings, the components represented by each symbol are listed as follows:

[0066] 1. Input pressure plate; 11. Positioning ball socket; 12. First limiting step; 13. Second arc-shaped ball socket;

[0067] 2. Intermediate pressure plate; 21. Ball passage; 22. First limiting ring; 23. Second limiting step; 24. Second brake tooth;

[0068] 3. Movable pressure plate; 31. Forward overload ball socket; 32. Reverse overload ball socket; 33. Second positioning platform; 34. Limiting boss; 35. Arc-shaped limiting groove; 36. Second limiting ring; 37. First brake tooth; 38. First arc-shaped ball socket;

[0069] 4. Overload steel ball; 41. Support ball;

[0070] 5. Intermediate shaft; 51. First disc spring; 52. Return leaf spring; 53. Input shaft; 54. Output shaft; 55. Flat key;

[0071] 6. Positioning plate; 61. First positioning platform;

[0072] 7. Emergency brake pawl; 71. Support; 72. Articulated shaft; 73. Push rod; 74. Return spring; 77. Second disc spring; 78. Buffer shaft; 79. Connecting rod; 790. Bearing; 791. Guide column; 792. Guide frame; 793. Connecting arm; 794. Connecting rod. DETAILED DESCRIPTION

[0073] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0074] Example 1

[0075] like Figures 1 to 17 As shown, a harvester feeding safety protection device of the present embodiment includes an input pressure plate 1, an intermediate pressure plate 2, a movable pressure plate 3, an overload steel ball 4, a first disc spring 51, a return leaf spring 52, a positioning plate 6 and an intermediate shaft 5, wherein the input pressure plate 1, the intermediate pressure plate 2, the movable pressure plate 3, the positioning plate 6 and the first disc spring 51 are sequentially sleeved on the intermediate shaft 5, and the return leaf spring 52 is sleeved on the outside of the positioning plate 6 and elastically clamps the positioning plate 6 and the movable pressure plate 3 to limit the position; the input pressure plate 1 is circumferentially movably connected to the intermediate shaft 5, the intermediate pressure plate 2 is fixedly connected to the intermediate shaft 5, the movable pressure plate 3 is movably connected to the intermediate shaft, the positioning plate 6 is axially movably connected to the intermediate shaft 5, and the first disc spring 51 is limited on one side of the positioning plate 6;

[0076] The input pressure plate 1 is provided with a plurality of locking ball sockets 11 on one side close to the intermediate pressure plate 2, the intermediate pressure plate 2 is provided with a plurality of ball passing channels 21, the movable pressure plate 3 is provided with a plurality of overload ball sockets, and two adjacent overload ball sockets are connected by a first arc-shaped ball socket 38, and the depth of the first arc-shaped ball socket 38 is less than the depth of the overload ball socket; during normal operation, the plurality of locking ball sockets 11, the plurality of ball passing channels 21 and the plurality of first arc-shaped ball sockets 38 are arranged in one-to-one correspondence.

[0077] Among them, a plurality of locking ball sockets 11 are evenly spaced along the circumference of the input pressure plate 1. The overload steel balls 4 can be locked in the locking ball sockets 11 to realize the locking of the input pressure plate 1 and the intermediate pressure plate 2, so that they rotate synchronously for power transmission.

[0078] Preferably, Figure 2 As shown, two adjacent locking ball sockets 11 of this embodiment are connected by a second arc-shaped ball socket 13. The second arc-shaped ball socket 13 is arranged along the circumferential running track of the overload steel ball 4. The depth of the second arc-shaped ball socket 13 is less than that of the locking ball socket 11, and is used to accommodate the overload steel ball 4 during overload protection or emergency braking.

[0079] In order to make the assembly between the various pressure plates more stable and reliable, such as Figure 13 As shown, a first limiting ring 22 is fixed to the outer circumference of the end of the intermediate pressure plate 2 close to the input pressure plate 1, and a first limiting step 12 is provided on the outer circumference of the end of the input pressure plate 1 close to the intermediate pressure plate 2. The first limiting ring 22 is movably mounted on the first limiting step 12. A second limiting ring 36 is fixed to the outer circumference of the end of the movable pressure plate 3 close to the intermediate pressure plate 2, and a second limiting step 23 is provided on the outer circumference of the end of the intermediate pressure plate 2 close to the movable pressure plate 3. The second limiting ring 36 is movably mounted on the second limiting step 23. By providing the limiting rings and cooperating with the corresponding limiting steps, the assembly between the various pressure plates is made more stable and compact.

[0080] The input pressure plate 1 of this embodiment is used for power input, and the intermediate shaft 5 can be connected to the output shaft 54 ​​for power output. The intermediate shaft 5 can be sleeved outside the output shaft 54 ​​and limited by a flat key 55.

[0081] like Figure 13 As shown, an optional solution of this embodiment is that a cover is further provided on the side of the intermediate shaft close to the first disc spring 51. The cover can be arranged on the outside of the first disc spring 51, the return leaf spring 52, the positioning plate 6 and a part of the movable pressure plate 3 for isolation and protection.

[0082] The harvester feeding safety protection device of this embodiment is equipped with an input pressure plate, an intermediate pressure plate and a movable pressure plate. When overload or emergency braking occurs, the overload steel ball can enter the forward overload ball socket, so that the input pressure plate and the intermediate pressure plate are no longer connected, and the power is disconnected. Through the cooperation between each pressure plate and the overload steel ball, the entire clutch structure is stable and reliable, and the overload steel ball is not easily worn.

[0083] Example 2

[0084] Based on the embodiment 1, this embodiment provides a preferred solution for elastically clamping the positioning plate and the movable pressure plate by using a return leaf spring. Figures 10 to 12 As shown, a first positioning platform 61 is provided on the peripheral edge of the positioning plate 6. The peripheral edge of the movable pressure plate 3 extends beyond the positioning plate 6 by a preset distance, and a second positioning platform 33 is provided on one side of the extending portion. The second positioning platform 33 and the first positioning platform 61 are arranged correspondingly along the radial direction of the intermediate shaft 5. The two ends of the return leaf spring 52 are close to and limited on both sides of the first positioning platform 61 and the second positioning platform 33. By providing the first and second positioning platforms, the two ends of the return leaf spring can elastically engage and limit the movable pressure plate and the positioning plate, facilitating subsequent return.

[0085] Among them, such as Figure 10 As shown, Figure 10 This is the normal working phase of the device. When the device is working normally, the first positioning platform 61 and the second positioning platform 33 are radially aligned and axially limited by the return leaf spring 52. At this time, the first brake teeth and the second brake teeth in the subsequent embodiments are staggered. Figure 11 As shown, Figure 11 This is the phase when the device is in forward rotation overload or emergency braking. At this time, the first brake tooth and the second brake tooth in the subsequent embodiments are aligned, and the first positioning platform 61 and the second positioning platform 33 are staggered in the positive circumferential direction to spread the two ends of the return leaf spring 52. Figure 12 As shown, Figure 12 To reverse the phase of the device when overloaded, the offset distance between the first brake tooth and the second brake tooth in the subsequent embodiments is increased, and the first positioning platform 61 and the second positioning platform 33 are circumferentially offset in opposite directions to spread the two ends of the return leaf spring 52 apart.

[0086] Example 3

[0087] Based on Example 1 or Example 2, this embodiment provides a preferred assembly solution for the movable pressure plate 3 and the positioning plate 6. Figures 10 to 12As shown, the movable pressure plate 3 is further provided with a limiting boss 34 on a side surface close to the positioning plate 6. A circular arc-shaped limiting groove 35 is formed on the circumferential edge of the positioning plate 6. The circumferential length of the circular arc-shaped limiting groove 35 is greater than the circumferential length of the limiting boss 34. The limiting boss 34 is located within the circular arc-shaped limiting groove 35. The cooperation between the limiting boss and the circular arc-shaped limiting groove prevents the movable pressure plate and the positioning plate from rotating too much relative to each other.

[0088] like Figures 10 to 12 As shown, preferably, two limiting bosses 34 can be provided, and two arc-shaped limiting grooves 35 can be provided on the positioning plate 6, and the two limiting bosses 34 are respectively placed in the two arc-shaped limiting grooves 35. Figure 10 As shown, Figure 10 This is the normal working phase of the device. When the device is working normally, a gap is reserved between the two limiting bosses 34 and the inner side wall of one end of the arc-shaped limiting groove 35. Figure 11 As shown, Figure 11 This is the phase when the device is in forward rotation and overload or emergency braking. At this time, one limiting boss 34 abuts against the inner side wall of one end of the arc-shaped limiting groove 35, and the other limiting boss 34 is in the middle of the arc-shaped limiting groove 35, that is, the distance between the other limiting boss 34 and the inner side wall of one end of the arc-shaped limiting groove 35 is further increased. Figure 12 As shown, Figure 12 When the device reverses the phase when overloaded, at this time, the other limiting boss 34 abuts against the inner side wall of one end of the arc-shaped limiting groove 35, and the distance between the limiting boss 34 and the inner side wall of one end of the arc-shaped limiting groove 35 is further increased.

[0089] Example 4

[0090] like Figure 13 As shown, on the basis of any of the above embodiments, in order to make the relative movement between the movable pressure plate 3 and the positioning plate 6 smoother, a supporting ball 41 is provided between the movable pressure plate 3 and the positioning plate 6, and a track groove can be provided on the movable pressure plate 3 and the positioning plate 6. The supporting steel balls can be rolled in the track groove. The supporting steel balls can convert the relative sliding of the components into rolling, thereby reducing wear and improving the reliability of the clutch.

[0091] Example 5

[0092] Based on any of the above embodiments, Figure 2 As shown, the overload ball socket of this embodiment includes a forward overload ball socket 31 and a reverse overload ball socket 32 ​​that are arranged adjacent to or partially overlapped. The depths of the forward overload ball socket 31 and the reverse overload ball socket 32 ​​are both deeper than the depth of the first arc-shaped ball socket 38. The depths of the forward overload ball socket 31 and the reverse overload ball socket 32 ​​can be the same. Figure 2As shown, it is preferred that the forward rotation overload ball socket 31 and the adjacent reverse rotation overload ball socket 32 ​​partially overlap to form a set of overload ball sockets. When the device is overloaded in the forward rotation, the overload steel ball 4 can slide from the first arc-shaped ball socket 38 into the forward rotation overload ball socket 31 for overload protection; when the device is overloaded in the reverse rotation, the overload steel ball 4 can slide from the first arc-shaped ball socket 38 into the reverse rotation overload ball socket 32 ​​for overload protection.

[0093] Example 6

[0094] Based on any of the above embodiments, Figures 15 to 17 As shown, the harvester feeding safety protection device of this embodiment also includes an emergency brake pawl 7, a support 71, and a drive unit. The main structure of the drive unit is mounted on the support 71 via a connecting rod 79. One end of the emergency brake pawl 7 is hinged to the support 71 via a hinge shaft 72, the central axis of which is parallel to the central axis of the intermediate shaft 5. The braking end of the emergency brake pawl 7 is spaced apart from the peripheral side walls of the movable pressure plate 3 and the peripheral side walls of the intermediate pressure plate 2. The drive unit is connected to the emergency brake pawl 7 and drives the emergency brake pawl 7 to abut against the peripheral side walls of the movable pressure plate 3 and the intermediate pressure plate 2. The outer peripheral side walls of the movable pressure plate 3 are provided with a plurality of first brake teeth 37, and the outer peripheral side walls of the intermediate pressure plate 2 are provided with a plurality of second brake teeth 24. During normal operation, the plurality of first brake teeth 37 and the plurality of second brake teeth 24 are staggered. By providing the emergency brake pawl, support, and drive unit, the movable pressure plate and the intermediate pressure plate can be emergency braked in an emergency.

[0095] The number of the first brake teeth 37 is the same as the number of the second brake teeth 24. When the device is in forward rotation and overloaded or in emergency braking, the multiple first brake teeth 37 and the multiple second brake teeth 24 are arranged in a one-to-one correspondence. The multiple first brake teeth 37 are evenly spaced along the circumference of the movable pressure plate 3, and the multiple second brake teeth 24 are evenly spaced along the circumference of the intermediate pressure plate 2. Preferably, the number of each of the first brake teeth 37 and the second brake teeth 24 is four.

[0096] Among them, two emergency braking claws 7 can be provided, and the two emergency braking claws 7 can be fixedly connected or not fixed, and the two emergency braking claws 7 are respectively arranged corresponding to the peripheral sides of the movable pressure plate 3 and the intermediate pressure plate 2.

[0097] like Figures 15 to 17As shown, a preferred embodiment of this embodiment comprises a driving unit comprising a push rod 73, the driving end of which is hingedly connected to the side of the emergency brake pawl 7 facing away from the movable pressure plate 3. The side of the emergency brake pawl 7 facing away from the movable pressure plate 3 is also connected to the support 71 via a return spring 74. The return spring facilitates the return of the push rod after emergency braking. The driving unit can utilize a pneumatic cylinder, a hydraulic cylinder, or a telescopic motor to drive the push rod 73 to extend and retract, thereby driving the emergency brake pawl 7 to rotate about the hinge axis 72.

[0098] A further embodiment of this embodiment is that the emergency brake unit further includes a metal detection sensor and a controller, the controller being electrically connected to the metal detection sensor and the drive unit, respectively. By providing the metal detection sensor and controller, the metal detection sensor can be used to detect the presence of metal objects at the material feed inlet and thereby control whether the drive unit is actuated. The metal detection sensor and controller of this embodiment can employ conventional metal detection sensors and controllers to detect metal objects, and the detection and control principles used are conventional.

[0099] like Figures 15 to 17 As shown, a preferred solution of this embodiment is that a connecting arm 793 is fixed to the support 71, the intermediate shaft 5 is a hollow structure and is sleeved and fixed with the output shaft 54, and the free end of the connecting arm 793 is rotatably connected to one end of the output shaft 54 ​​via a bearing 790. The provision of the connecting arm can provide support for the entire device and facilitate the layout of the various components.

[0100] One end of the connecting arm 793 of this embodiment is fixed to the support 71 , and the other end is rotatably connected to the output shaft 54 ​​.

[0101] Example 7

[0102] Based on Example 6, this embodiment provides a buffering solution for emergency braking. Figures 15 to 17 As shown, the support 71 is provided with a guide column 791, the central axis of which is perpendicular to the central axis of the hinge shaft 72. A guide frame 792 is movably mounted on the free end of the guide column 791. A second disc spring 77 is provided between the guide frame 792 and the support 71. The connecting arm 793 is further provided with a buffer shaft 78 arranged parallel to the hinge shaft 72. The hinge shaft 72 and the buffer shaft 78 are movably connected via a connecting rod 794. The provision of the second disc spring, guide column, and guide frame provides a buffering effect for the entire device during emergency braking, thereby reducing or avoiding the impact caused by a large load during a sudden emergency stop.

[0103] Specifically, the center axis of the guide column 791 passes through the center axis of the hinge shaft 72, the connecting arm 793 can adopt a V-shaped structure, one end of the buffer shaft 78 can be fixed at the corner of the V-shaped structure, and the hinge shaft 72 is located inside the corner of the V-shaped structure and is arranged side by side on one side of the buffer shaft 78. The guide bracket 792 can adopt a U-shaped structure.

[0104] In this embodiment, the guide column 791 is in a tapered structure, the small end of the guide column 791 is fixed on the support 71, and the large end of the guide column 791 is movably sleeved on the guide bracket 792. The second disc spring 77 is sleeved outside the guide column 791 and is matched with the outer wall of the guide column 791.

[0105] Embodiment 8

[0106] On the basis of any one of the embodiments 1 to 4, the present embodiment provides a harvesting machine feeding safety protection method, which is implemented by using the harvesting machine feeding safety protection device as described above, and includes the following steps:

[0107] In normal operation, the input disc 1 receives power transmitted by the input shaft 53, drives the intermediate disc 2 and the movable disc 3 to rotate through the overload steel ball 4, and further drives the positioning disc 6 and the intermediate shaft 5 to rotate for power output.

[0108] In overload protection, the intermediate disc 2 is reduced in rotation speed or stopped due to equipment overload (when the output shaft encounters a load greater than the torque of the clutch), the input disc 1 continuously inputs power, the force of the first disc spring cannot keep the overload steel ball 4 in the clamping ball socket 11 of the input disc, and the overload steel ball 4 tends to climb out of the clamping ball socket 11, which pushes the movable disc 3 away, the movable disc 3 rotates with the overload steel ball 4, and the overload steel ball 4 falls into the overload ball socket of the movable disc 3. At this time, the input disc 1 is disconnected from the intermediate disc 2 in power, and cannot transmit power, thereby playing a safety protection role. In the process of extruding the overload steel ball 4 from the clamping ball socket 11 under the torsional force of the input disc 1, the movable disc 3 and the positioning disc 6 are axially moved, the first disc spring 51 is compressed, the movable disc 3 rotates relative to the positioning disc 6 by a preset angle, the overload steel ball 4 enters the overload ball socket of the movable disc 3, the two ends of the return plate spring 52 are opened by a preset angle, and the input disc 1 and the intermediate disc 2 are disengaged, thereby achieving overload protection.

[0109] When the device returns, after the overload protection is released, the input disc 1 reversely rotates (at a low rotation speed) under the reverse power transmitted by the input shaft 53, so that the clamping ball socket 11 of the input disc 1 corresponds to the ball passing channel 21 of the intermediate disc 2. Under the elastic action of the return plate spring 52, the movable disc 3 is returned relative to the positioning disc 6 by a preset angle, the overload steel ball 4 enters the first arc-shaped ball socket 38 from the overload ball socket, and then is clamped into the clamping ball socket 11 of the input disc 1, so that the device returns.

[0110] The harvester feeding safety protection method of this embodiment can perform overload protection when the output shaft encounters a load greater than the clutch torque, and can also return to its original position when the overloaded material is cleared.

[0111] Example 9

[0112] Based on Example 5, this embodiment provides a harvester feeding safety protection method, which is implemented using the harvester feeding safety protection device described above, and includes the following steps:

[0113] During normal operation, the input pressure plate 1 receives power transmitted by the input shaft 53, drives the intermediate pressure plate 2 and the movable pressure plate 3 to rotate through the overload steel ball 4, and then drives the positioning plate 6 and the intermediate shaft 5 to rotate for power output;

[0114] During forward overload protection, the intermediate pressure plate 2 reduces its speed or stops rotating due to equipment overload (when the output shaft encounters a load greater than the clutch torque), and the input pressure plate 1 continues to input power in the forward direction. The overload steel ball 4 is squeezed out of the positioning ball socket 11 under the action of the torsional force of the input pressure plate 1, and pushes the movable pressure plate 3 and the positioning plate 6 to move axially, compressing the first disc spring 51. At the same time, the movable pressure plate 3 rotates relative to the positioning plate 6 by a preset angle, and the overload steel ball 4 enters the forward overload ball socket 31 of the movable pressure plate 3, causing the two ends of the return leaf spring 52 to open by a preset angle, and the input pressure plate 1 and the intermediate pressure plate 2 are released from the clamping, and forward overload protection is performed;

[0115] When the device returns to its original position, the input pressure plate 1 receives the reverse power transmitted by the input shaft 53 and rotates in the reverse direction (at a low speed), so that the locking ball socket 11 of the input pressure plate 1 corresponds to the ball passage 21 of the intermediate pressure plate 2. Under the elastic action of the return leaf spring 52, the movable pressure plate 3 returns to a preset angle relative to the positioning plate 6. The overload steel ball 4 enters the first arc-shaped ball socket 38 from the forward rotation overload ball socket 31 and then snaps into the locking ball socket 11 of the input pressure plate 1 to return the device to its original position.

[0116] During reverse overload protection, after the device returns to its position, the input pressure plate 1 continues to rotate in the reverse direction to spit out the overloaded material. The intermediate pressure plate 2 reduces its speed or stops rotating due to equipment overload (when the output shaft encounters a load greater than the clutch torque). The input pressure plate 1 continues to input power in the reverse direction. The overload steel ball 4 is squeezed out from the positioning ball socket 11 under the action of the torsional force of the input pressure plate 1, and pushes the movable pressure plate 3 and the positioning plate 6 to move axially, compressing the first disc spring 51. At the same time, the movable pressure plate 3 rotates relative to the positioning plate 6 by a preset angle, and the overload steel ball 4 enters the reverse overload ball socket 32 ​​of the movable pressure plate 3, causing the two ends of the return leaf spring 52 to open by a preset angle, and the input pressure plate 1 and the intermediate pressure plate 2 are released to perform reverse overload protection.

[0117] After reverse overload protection, you can manually clear the blockage and continue normal operation after returning to the forward (low speed) position.

[0118] The harvester feeding safety protection method of this embodiment can perform reverse overload protection during the process of reverse rotation of the input shaft to discharge materials.

[0119] Example 10

[0120] Based on Example 6 or 7, this embodiment provides a harvester feeding safety protection method, which is implemented using the harvester feeding safety protection device described above, and includes the following steps:

[0121] During normal operation, the input pressure plate 1 receives power transmitted by the input shaft 53, drives the intermediate pressure plate 2 and the movable pressure plate 3 to rotate through the overload steel ball 4, and then drives the positioning plate 6 and the intermediate shaft 5 to rotate for power output;

[0122] During overload protection, the intermediate pressure plate 2 reduces its speed or stops rotating due to equipment overload (when the output shaft encounters a load greater than the clutch torque), and the input pressure plate 1 continues to input power. The overload steel ball 4 is squeezed out of the positioning ball socket 11 under the action of the torsional force of the input pressure plate 1, and pushes the movable pressure plate 3 and the positioning plate 6 to move axially, compressing the first disc spring 51. At the same time, the movable pressure plate 3 rotates a preset angle relative to the positioning plate 6, and the overload steel ball 4 enters the overload ball socket of the movable pressure plate 3, causing the two ends of the return leaf spring 52 to open a preset angle, and the input pressure plate 1 and the intermediate pressure plate 2 are released from the clamping, and overload protection is performed;

[0123] When the device returns to its original position after overload protection, after the overload condition is released, the input pressure plate 1 receives the reverse power transmitted by the input shaft and rotates in the reverse direction (at a low speed), so that the locking ball socket 11 of the input pressure plate 1 corresponds to the ball passage 21 of the intermediate pressure plate 2. Under the elastic action of the return leaf spring 52, the movable pressure plate 3 returns to a preset angle relative to the positioning plate 6, and the overload steel ball 4 enters the first arc-shaped ball socket 38 from the overload ball socket, and then snaps into the locking ball socket 11 of the input pressure plate 1 to return the device to its original position.

[0124] During emergency braking, for example, when a metal detector sensor at the material feed inlet detects a metal object, the controller can analyze and control the operation of the push rod, and brake the vehicle using the first and second brake teeth. Specifically, the drive unit drives the emergency brake pawl 7 to rotate about the hinge shaft 72 and abut against the peripheral side walls of the movable pressure plate 3 and the intermediate pressure plate 2. The movable pressure plate 3 is first braked by the first brake tooth 37. After the input pressure plate 1 and the intermediate pressure plate 2 continue to rotate a certain angle, the intermediate pressure plate 2 is braked by the second brake tooth 24. The overload steel ball 4 falls into the overload ball socket (forward overload ball socket) of the movable pressure plate 3. At the same time, the positioning plate 6 rotates a preset angle relative to the movable pressure plate 3, causing the two ends of the return leaf spring 52 to open by a preset angle. At this time, the input pressure plate 1 continues to input power. The overload steel ball 4 is squeezed out of the locking ball socket 11 under the action of the torque of the input pressure plate 1 and enters the overload ball socket of the movable pressure plate 3. The input pressure plate 1 and the intermediate pressure plate 2 are disengaged, and emergency braking is performed.

[0125] When the device returns to its position after emergency braking, after the emergency brake is released (after the metal object is cleared, the metal detection sensor detects no metal information, the controller is used to control the push rod to stop working, and the push rod is pulled back by the return spring), the input pressure plate 1 receives the reverse power transmitted by the input shaft and rotates in the opposite direction (low speed), so that the positioning ball socket 11 of the input pressure plate 1 corresponds to the ball passage 21 of the intermediate pressure plate 2, and under the elastic action of the return leaf spring 52, the movable pressure plate 3 returns to the preset angle relative to the positioning plate 6, and the overload steel ball 4 enters the first arc-shaped ball socket 38 from the overload ball socket, and then snaps into the positioning ball socket 11 of the input pressure plate 1 to return the device.

[0126] The harvester feeding safety protection method of this embodiment can perform overload protection when the output shaft encounters a load greater than the clutch torque, and can also return to its original position when the overloaded material is cleared; it can also provide protection during emergency braking.

[0127] In the description of the present invention, it should be understood that the terms "center", "length", "inside", "outside", "forward", "reverse", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0128] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0129] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0130] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0131] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0132] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A harvester feeding safety protection device, characterized in that: The cam is provided with a first disc spring, a second disc spring and a second disc spring, and the first disc spring is provided on the intermediate shaft in sequence. The cam is provided with a first disc spring, a second disc spring and a second disc spring, and the first disc spring is provided on the intermediate shaft in sequence. The first disc spring is provided on the outer side of the intermediate shaft and elastically engages and limits the positioning plate and the movable pressure plate. The input pressure plate is circumferentially movably connected to the intermediate shaft, the intermediate pressure plate is fixedly connected to the intermediate shaft, the movable pressure plate is movably connected to the intermediate shaft, the positioning plate is axially movably connected to the intermediate shaft, and the first disc spring is limited on one side of the positioning plate. The input pressure plate is provided with a plurality of locking ball sockets on a side close to the intermediate pressure plate, the intermediate pressure plate is provided with a plurality of ball passing channels, the movable pressure plate is provided with a plurality of overload ball sockets, and two adjacent overload ball sockets are connected by a first arc-shaped ball socket, and the depth of the first arc-shaped ball socket is less than the depth of the overload ball socket; during normal operation, the plurality of locking ball sockets, the plurality of ball passing channels and the plurality of first arc-shaped ball sockets are arranged in one-to-one correspondence.

2. A harvester feeding safety protection device according to claim 1, characterized in that: A first positioning platform is provided on the circumferential edge of the positioning plate, and a second positioning platform is provided on the side of the circumferential edge of the movable pressure plate that exceeds the preset distance of the positioning plate and the exceeding part. The second positioning platform and the first positioning platform are arranged correspondingly along the radial direction of the intermediate shaft, and the two ends of the return leaf spring are close to and limited on both sides of the first positioning platform and the second positioning platform.

3. A harvester feeding safety protection device according to claim 2, characterized in that: A limiting boss is further provided on a side of the movable pressure plate close to the positioning plate, and an arc-shaped limiting groove is opened on the circumferential edge of the positioning plate. The circumferential length of the arc-shaped limiting groove is greater than the circumferential length of the limiting boss, and the limiting boss is located in the arc-shaped limiting groove.

4. A harvester feeding safety protection device according to claim 1, characterized in that: A supporting ball is provided between the movable pressure plate and the positioning plate; Or / and, two adjacent positioning ball sockets are connected via a second arc-shaped ball socket.

5. A harvester feeding safety protection device according to claim 1, characterized in that: A first limiting ring is fixed on the outer circumference of one end of the intermediate pressure plate close to the input pressure plate, and a first limiting step is provided on the outer circumference of one end of the input pressure plate close to the intermediate pressure plate, and the first limiting ring is movably sleeved on the first limiting step; A second limiting ring is fixed on the outer circumference of one end of the movable pressure plate close to the intermediate pressure plate, and a second limiting step is provided on the outer circumference of one end of the intermediate pressure plate close to the movable pressure plate. The second limiting ring is movably sleeved on the second limiting step.

6. A harvester feeding safety protection device according to any one of claims 1 to 5, characterized in that: The overload ball socket includes a forward rotation overload ball socket and a reverse rotation overload ball socket that are arranged adjacent to or partially overlapped.

7. A harvester feeding safety protection device according to any one of claims 1 to 5, characterized in that: The invention also includes an emergency brake pawl, a support and a driving unit, wherein the main structure of the driving unit is mounted on the support, one end of the emergency brake pawl is hinged to the support via a hinge shaft, and the central axis of the hinge shaft is arranged parallel to the central axis of the intermediate shaft; the braking end of the emergency brake pawl is spaced apart from and corresponds to the peripheral side wall of the movable pressure plate and the peripheral side wall of the intermediate pressure plate, and the driving unit is connected to the emergency brake pawl and drives the emergency brake pawl to abut against the peripheral side wall of the movable pressure plate and the intermediate pressure plate; A plurality of first braking teeth are provided on the outer peripheral side wall of the movable pressure plate, and a plurality of second braking teeth are provided on the outer peripheral side wall of the intermediate pressure plate; during normal operation, the plurality of first braking teeth and the plurality of second braking teeth are staggered.

8. A harvester feeding safety protection device according to claim 7, characterized in that: The driving part includes a push rod, the driving end of the push rod is hinged to the side of the emergency brake claw away from the movable pressure plate, and the side of the emergency brake claw away from the movable pressure plate is also connected to the support through a return spring.

9. A harvester feeding safety protection device according to claim 7, characterized in that: The emergency braking unit further includes a metal detection sensor and a controller, and the controller is electrically connected to the metal detection sensor and the driving unit respectively.

10. A harvester feeding safety protection device according to claim 7, characterized in that: A connecting arm is fixed on the support, the intermediate shaft is a hollow structure and is sleeved and fixed with an output shaft, and the free end of the connecting arm is rotatably connected to one end of the output shaft through a bearing; A guide column is provided on the support, and the central axis of the guide column is perpendicular to the central axis of the hinge shaft. The free end of the guide column is movably sleeved with a guide frame, and a second disc spring is provided between the guide frame and the support. A buffer shaft arranged parallel to the hinge shaft is also provided on the connecting arm, and the hinge shaft and the buffer shaft are movably connected by a connecting rod.

11. A harvester feeding safety protection method, characterized in that: The method is implemented by using a harvester feeding safety protection device as claimed in any one of claims 1 to 5, comprising the following steps: During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output; During overload protection, the intermediate pressure plate reduces or stops rotating due to the overload speed of the equipment, and the input pressure plate continues to input power. The overload steel ball is squeezed out from the positioning ball socket under the action of the input pressure plate torque, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released from the clamping, and overload protection is performed; When the device returns to its original position and the overload protection is released, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the opposite direction, so that the positioning ball socket of the input pressure plate corresponds to the ball passing channel of the intermediate pressure plate, and under the elastic action of the return leaf spring, the movable pressure plate returns to the preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the overload ball socket, and then is locked into the positioning ball socket of the input pressure plate to return the device to its original position.

12. A harvester feeding safety protection method, characterized in that: The method is implemented by using a harvester feeding safety protection device as claimed in claim 6, comprising the following steps: During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output; During the forward overload protection, the intermediate pressure plate reduces or stops rotating due to the overload speed of the equipment, and the input pressure plate continues to input power in the forward direction. The overload steel ball is squeezed out from the locking ball socket under the action of the torsion of the input pressure plate, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the forward overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released from the locking, and the forward overload protection is performed; When the device returns to its original position, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the reverse direction, so that the locking ball socket of the input pressure plate corresponds to the ball passage of the intermediate pressure plate. Under the elastic action of the return leaf spring, the movable pressure plate returns to a preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the forward-rotating overload ball socket, and then locks into the locking ball socket of the input pressure plate to return the device to its original position. During reverse overload protection, after the device returns to its position, the input pressure plate continues to rotate in the reverse direction to spit out the overloaded material. The intermediate pressure plate reduces or stops rotating due to the overload of the equipment, and the input pressure plate continues to input power in the reverse direction. The overload steel ball is squeezed out from the positioning ball socket under the action of the torque of the input pressure plate, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the reverse overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released to perform reverse overload protection.

13. A harvester feeding safety protection method, characterized in that: The method is implemented by using a harvester feeding safety protection device as claimed in any one of claims 7 to 10, comprising the following steps: During normal operation, the input pressure plate receives the power transmitted by the input shaft, drives the intermediate pressure plate and the movable pressure plate to rotate through the overload steel ball, and then drives the positioning plate and the intermediate shaft to rotate for power output; During overload protection, the intermediate pressure plate reduces or stops rotating due to the overload speed of the equipment, and the input pressure plate continues to input power. The overload steel ball is squeezed out from the positioning ball socket under the action of the input pressure plate torque, and pushes the movable pressure plate and the positioning plate to move axially, compressing the first disc spring. At the same time, the movable pressure plate rotates relative to the positioning plate by a preset angle, and the overload steel ball enters the overload ball socket of the movable pressure plate, causing the two ends of the return leaf spring to open by a preset angle, and the input pressure plate and the intermediate pressure plate are released from the clamping, and overload protection is performed; When the device returns to its original position after overload protection, after the overload condition is released, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the reverse direction, so that the locking ball socket of the input pressure plate corresponds to the ball passage of the intermediate pressure plate, and under the elastic action of the return leaf spring, the movable pressure plate returns to the preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the overload ball socket, and then locks into the locking ball socket of the input pressure plate to return the device to its original position; During emergency braking, the driving part drives the emergency braking claw to rotate around the hinge shaft and abut against the peripheral side walls of the movable pressure plate and the intermediate pressure plate, and first brakes the movable pressure plate through the first brake tooth. After the input pressure plate and the intermediate pressure plate continue to rotate a certain angle, the input pressure plate continues to input power, and the overload steel ball is squeezed out of the positioning ball socket under the action of the torsion of the input pressure plate and enters the overload ball socket of the movable pressure plate, and the input pressure plate and the intermediate pressure plate are released from the clamping connection; then the intermediate pressure plate is braked through the second brake tooth, and at the same time the positioning plate rotates a preset angle relative to the movable pressure plate, so that the two ends of the return leaf spring open a preset angle, and emergency braking is performed; When the device returns to its position after emergency braking, after the emergency brake is released, the input pressure plate receives the reverse power transmitted by the input shaft and rotates in the opposite direction, so that the locking ball socket of the input pressure plate corresponds to the ball passing channel of the intermediate pressure plate, and under the elastic action of the return leaf spring, the movable pressure plate returns to the preset angle relative to the positioning plate, and the overload steel ball enters the first arc-shaped ball socket from the overload ball socket, and then locks into the locking ball socket of the input pressure plate to return the device to its position.

Images