Harvester feeding safety protection device

Abstract

The utility model relates to a harvester feeding safety protection device which comprises an input pressure plate, a middle pressure plate, a movable pressure plate, an overload steel ball, a first disc spring, a return plate spring, a positioning plate and a middle shaft, and the input pressure plate, the middle pressure plate, the movable pressure plate, the positioning plate and the first disc spring are sequentially arranged on the middle shaft in a sleeved mode. 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] This utility model relates to the technical field of harvesters, specifically to a harvester feeding safety protection device. Background Technology

[0002] Currently, safety clutches are a widely used type of clutch in the mechanical field, primarily functioning to protect working components from overload. There are various types of safety clutches on the market, including friction plate type, sliding pin type, jaw clutch type, and steel ball type. Most existing clutches only provide overload protection and are prone to overheating, burn-out, short lifespan, and limited functionality. Furthermore, existing clutches cause severe wear on components, resulting in high replacement costs, time, and labor, and are detrimental to operational safety. In addition, with the increasing market for forage harvesting machinery, safety clutches with only overload protection cannot prevent metal objects such as wires and iron filings from entering the harvester along with the straw. There is an urgent need for a new type of safety clutch that can stop the machine immediately when metal objects are about to enter, preventing metal contamination of forage. Utility Model Content

[0003] This utility model provides a safety protection device for feeding a harvester in order to solve one or more technical problems existing in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A safety protection device for feeding a harvester includes an input pressure plate, an intermediate pressure plate, a movable pressure plate, an overload steel ball, a first disc spring, a return leaf spring, a positioning plate, and an intermediate shaft. The input pressure plate, intermediate pressure plate, movable pressure plate, positioning plate, and first disc spring are sequentially sleeved on the intermediate shaft. The return leaf spring is sleeved on the outside of the positioning plate and elastically engages and limits the positioning plate and the movable pressure plate. The input pressure plate is circumferentially 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, and the positioning plate is axially connected to the intermediate shaft. The first disc spring is limited to one side of the positioning plate.

[0005] The input pressure plate has multiple locking ball sockets on one side near the middle pressure plate. The middle pressure plate has multiple ball passage channels. The movable pressure plate has multiple overload ball sockets. Adjacent overload ball sockets are connected by a first arc-shaped ball socket. The depth of the first arc-shaped ball socket is less than the depth of the overload ball socket. During normal operation, the multiple locking ball sockets, multiple ball passage channels, and multiple first arc-shaped ball sockets are arranged in a one-to-one correspondence.

[0006] The beneficial effects of this utility model are: the harvester feeding safety protection device of this utility model, by setting an input pressure plate, an intermediate pressure plate and a movable pressure plate, can allow the overload steel ball to enter the forward rotation 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] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the peripheral edge of the positioning disk is provided with a first positioning platform, and the peripheral edge of the movable pressure plate extends beyond the positioning disk by a preset distance and is provided with a second positioning platform on one side of the extended portion. The second positioning platform and the first positioning platform are arranged radially correspondingly along the intermediate axis, and the two ends of the return leaf spring are brought together and limited on both sides of the first positioning platform and the second positioning platform.

[0009] The beneficial effect of adopting the above-mentioned further solution is that by setting the first positioning platform and the second positioning platform, the two ends of the return leaf spring can elastically engage and limit the movable pressure plate and the positioning plate, which facilitates the subsequent return.

[0010] Furthermore, the movable pressure plate is provided with a limiting boss on one side near the positioning plate, and an arc-shaped limiting groove is provided on the peripheral 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.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the cooperation between the limiting boss and the arc-shaped limiting groove avoids excessive relative rotation angle between the movable pressure plate and the positioning plate.

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

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

[0014] The beneficial effect of adopting the above-mentioned further solution is that the setting of the supporting ball 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 periphery of the end of the intermediate pressure plate near the input pressure plate, and a first limiting step is provided on the outer periphery of the end of the input pressure plate near the intermediate pressure plate, with the first limiting ring movably sleeved on the first limiting step;

[0016] A second limiting ring is fixed on the outer periphery of the end of the movable pressure plate near the middle pressure plate, and a second limiting step is provided on the outer periphery of the end of the middle pressure plate near the movable pressure plate. The second limiting ring is movably sleeved on the second limiting step.

[0017] The beneficial effect of adopting the above-mentioned further solution is that by setting a limit ring and cooperating with the corresponding limit step, the assembly between each pressure plate is more stable and compact.

[0018] Furthermore, the overload ball socket includes forward-rotating overload ball sockets and reverse-rotating overload ball sockets arranged adjacently or partially overlapping each other.

[0019] Furthermore, it also includes an emergency braking claw, a support, and a drive unit. The main structure of the drive 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 which is arranged parallel to the central axis of the intermediate shaft. The braking end of the emergency braking claw is arranged at intervals corresponding to the peripheral sidewalls of the movable pressure plate and the intermediate pressure plate. The drive unit is connected to the emergency braking claw and drives the emergency braking claw to abut against the peripheral sidewalls of the movable pressure plate and the intermediate pressure plate.

[0020] The outer peripheral sidewall of the movable pressure plate is provided with multiple first brake teeth, and the outer peripheral sidewall of the intermediate pressure plate is provided with multiple second brake teeth; during normal operation, the multiple first brake teeth and multiple second brake teeth are arranged in a staggered manner.

[0021] The beneficial effect of adopting the above-mentioned further solution is that, by setting up an emergency braking claw, a support and a drive unit, the movable pressure plate and the intermediate pressure plate can be braked in an emergency.

[0022] Furthermore, the drive unit includes a push rod, the drive end of which is hinged to the side of the emergency brake pawl away from the movable pressure plate. The side of the emergency brake pawl away from the movable pressure plate is also connected to the support via a return spring.

[0023] The beneficial effect of adopting the above-mentioned further solution is that by setting a return spring, it is convenient for the push rod to return to its original position after emergency braking.

[0024] Furthermore, it also includes a metal detection sensor and a controller, wherein the controller is electrically connected to the metal detection sensor and the drive unit, respectively.

[0025] The beneficial effect of adopting the above-mentioned further solution is that by setting up a metal detection sensor and a controller, the metal detection sensor can be used to detect whether there is a metal object at the material feeding inlet, so as to control whether the drive unit can operate.

[0026] Furthermore, a connecting arm is fixed on the support, the intermediate shaft is a hollow structure and an output shaft is sleeved and fixed thereon, 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-mentioned further solution is that the connecting arm can provide support for the entire device and facilitate the layout of the positions of various components.

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

[0029] The beneficial effect of adopting the above-mentioned further solution is that by setting a second disc spring, guide column and guide frame, the entire device can be buffered during emergency braking, which can reduce or avoid the impact caused by large loads during sudden emergency stop. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the movable pressure plate of this utility model. Figure 1 ;

[0031] Figure 2 This is a three-dimensional structural diagram of the movable pressure plate of this utility model. Figure 2 ;

[0032] Figure 3 This is a three-dimensional structural diagram of the input pressure plate of this utility model;

[0033] Figure 4 This is a three-dimensional structural diagram of the intermediate pressure plate of this utility model. Figure 1 ;

[0034] Figure 5 This is a three-dimensional structural diagram of the intermediate pressure plate of this utility model. Figure 2 ;

[0035] Figure 6 This is a three-dimensional structural diagram of the input pressure plate and the intermediate pressure plate of this utility model.

[0036] Figure 7 This is a three-dimensional structural diagram of the cooperation between the intermediate pressure plate and the movable pressure plate of this utility model. Figure 1 ;

[0037] Figure 8 This is a three-dimensional structural diagram of the cooperation between the intermediate pressure plate and the movable pressure plate of this utility model. Figure 2 ;

[0038] Figure 9This is a three-dimensional structural diagram of the cooperation between the intermediate pressure plate and the movable pressure plate of this utility model. Figure 3 ;

[0039] Figure 10 This is a three-dimensional structural diagram of the intermediate pressure plate, movable pressure plate, and positioning plate of this utility model. Figure 1 ;

[0040] Figure 11 This is a three-dimensional structural diagram of the intermediate pressure plate, movable pressure plate, and positioning plate of this utility model. Figure 2 ;

[0041] Figure 12 This is a three-dimensional structural diagram of the intermediate pressure plate, movable pressure plate, and positioning plate of this utility model. Figure 3 ;

[0042] Figure 13 A cross-sectional structural schematic diagram of one embodiment of the safety protection device for feeding a harvester according to this utility model;

[0043] Figure 14 A three-dimensional structural diagram of one embodiment of the safety protection device for the feeder of the harvester according to this utility model;

[0044] Figure 15 A three-dimensional structural schematic diagram of another embodiment of the safety protection device for feeding a harvester according to this utility model;

[0045] Figure 16 A cross-sectional structural schematic diagram of another embodiment of the safety protection device for the feeder of the harvester according to this utility model;

[0046] Figure 17 This is a side view of another embodiment of the safety protection device for the feeder of the harvester according to the present invention.

[0047] The attached diagram lists the components represented by each number as follows:

[0048] 1. Input pressure plate; 11. Positioning ball socket; 12. First limiting step; 13. Second arc-shaped ball socket;

[0049] 2. Intermediate pressure plate; 21. Ball passage; 22. First limiting ring; 23. Second limiting step; 24. Second braking tooth;

[0050] 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;

[0051] 4. Overload steel balls; 41. Supporting rolling balls;

[0052] 5. Intermediate shaft; 51. First disc spring; 52. Return leaf spring; 53. Input shaft; 54. Output shaft; 55. Parallel key;

[0053] 6. Positioning plate; 61. First positioning stage;

[0054] 7. Emergency brake pawl; 71. Support; 72. Hinge shaft; 73. Push rod; 74. Return spring; 77. Second disc spring; 78. Buffer shaft; 79. Connecting rod; 790. Bearing; 791. Guide post; 792. Guide frame; 793. Connecting arm; 794. Connecting rod. Detailed Implementation

[0055] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0056] Example 1

[0057] like Figures 1-17 As shown, a harvester feeding safety protection device according to this 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. The input pressure plate 1, intermediate pressure plate 2, movable pressure plate 3, positioning plate 6, and first disc spring 51 are sequentially sleeved on the intermediate shaft 5. The return leaf spring 52 is sleeved on the outside of the positioning plate 6 and elastically engages and limits the positioning plate 6 and the movable pressure plate 3. The input pressure plate 1 is circumferentially 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, and the positioning plate 6 is axially connected to the intermediate shaft 5. The first disc spring 51 is limited to one side of the positioning plate 6.

[0058] The input pressure plate 1 has multiple locking ball sockets 11 on one side near the middle pressure plate 2. The middle pressure plate 2 has multiple ball passage channels 21. The movable pressure plate 3 has multiple overload ball sockets. Adjacent overload ball sockets are connected by a first arc-shaped ball socket 38. The depth of the first arc-shaped ball socket 38 is less than the depth of the overload ball socket. During normal operation, the multiple locking ball sockets 11, multiple ball passage channels 21 and multiple first arc-shaped ball sockets 38 are arranged in a one-to-one correspondence.

[0059] Multiple locking sockets 11 are evenly spaced along the circumference of the input pressure plate 1. Overload steel balls 4 can be locked in the locking sockets 11 to achieve locking between the input pressure plate 1 and the intermediate pressure plate 2, so that they rotate synchronously to transmit power.

[0060] Preferred, such as Figure 2As shown, in this embodiment, two adjacent positioning ball sockets 11 are connected by a second arc-shaped ball socket 13. The second arc-shaped ball socket 13 is arranged along the circumferential running trajectory of the overload steel ball 4, and the depth of the second arc-shaped ball socket 13 is less than the depth of the positioning ball socket 11, so as to accommodate the overload steel ball 4 during overload protection or emergency braking.

[0061] 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 periphery of the intermediate pressure plate 2 near the input pressure plate 1, and a first limiting step 12 is provided on the outer periphery of the input pressure plate 1 near the intermediate pressure plate 2. The first limiting ring 22 is movably fitted onto the first limiting step 12. A second limiting ring 36 is fixed to the outer periphery of the movable pressure plate 3 near the intermediate pressure plate 2, and a second limiting step 23 is provided on the outer periphery of the intermediate pressure plate 2 near the movable pressure plate 3. The second limiting ring 36 is movably fitted onto the second limiting step 23. By setting limiting rings and cooperating with corresponding limiting steps, the assembly between the pressure plates is made more stable and compact.

[0062] In this embodiment, the input pressure plate 1 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 on the output shaft 54 ​​and limited by a flat key 55.

[0063] like Figure 13 As shown, in an optional embodiment, the intermediate shaft is provided with a cover on the side near the first disc spring 51. The cover can cover a part of the first disc spring 51, the return leaf spring 52, the positioning plate 6 and the movable pressure plate 3 for isolation and protection.

[0064] The harvester feeding safety protection device in this embodiment, by setting an input pressure plate, an intermediate pressure plate and a movable pressure plate, can cause the overload steel ball to enter the forward rotation 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.

[0065] Example 2

[0066] Based on Example 1, this example provides a preferred solution for elastically engaging the positioning plate and the movable pressure plate using a return leaf spring. For example... Figures 10-12As shown, the positioning disk 6 has a first positioning platform 61 on its peripheral edge, and the movable pressure plate 3 has a second positioning platform 33 on one side of its peripheral edge that extends beyond a preset distance from the positioning disk 6. The second positioning platform 33 and the first positioning platform 61 are arranged radially correspondingly along the intermediate axis 5. The two ends of the return leaf spring 52 are close together and limited on both sides of the first positioning platform 61 and the second positioning platform 33. By setting the first positioning platform and the second positioning platform, the two ends of the return leaf spring can elastically engage and limit the movable pressure plate and the positioning disk, facilitating subsequent return.

[0067] Among them, such as Figure 10 As shown, Figure 10 During normal operation of the device, the first positioning platform 61 and the second positioning platform 33 are radially aligned and axially limited by the return leaf spring 52. In this case, the first braking tooth and the second braking tooth in subsequent embodiments are misaligned. For example... Figure 11 As shown, Figure 11 This is the phase during forward overload or emergency braking of the device. In this case, the first and second brake teeth in subsequent embodiments are aligned, and the first positioning platform 61 and the second positioning platform 33 are staggered in the circumferential positive direction, thus spreading the two ends of the return leaf spring 52 apart. Figure 12 As shown, Figure 12 When the device is overloaded, the misalignment distance between the first brake tooth and the second brake tooth in the subsequent embodiment increases, and the first positioning platform 61 and the second positioning platform 33 are misaligned in opposite directions around the circumference, which opens up both ends of the return leaf spring 52.

[0068] Example 3

[0069] Based on Embodiment 1 or Embodiment 2, this embodiment provides a preferred assembly scheme for the movable pressure plate 3 and the positioning plate 6. For example... Figures 10-12 As shown, the movable pressure plate 3 is provided with a limiting boss 34 on one side near the positioning plate 6. The positioning plate 6 has an arc-shaped limiting groove 35 on its peripheral edge. The circumferential length of the arc-shaped limiting groove 35 is greater than the circumferential length of the limiting boss 34, and the limiting boss 34 is located within the arc-shaped limiting groove 35. The cooperation between the limiting boss and the arc-shaped limiting groove prevents excessive relative rotation angle between the movable pressure plate and the positioning plate.

[0070] like Figures 10-12 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, with the two limiting bosses 34 respectively placed in the two arc-shaped limiting grooves 35. Figure 10 As shown, Figure 10 For the normal operating phase of the device, when the device is operating normally, a gap is reserved between the two limiting bosses 34 and the inner sidewall of one end of the arc-shaped limiting groove 35. For example... Figure 11 As shown, Figure 11 This is the phase during forward overload or emergency braking of the device. At this time, one limiting boss 34 abuts against the inner wall of one end of the arc-shaped limiting groove 35, while the other limiting boss 34 is positioned in the middle of the arc-shaped limiting groove 35, meaning the distance between the other limiting boss 34 and the inner wall of one end of the arc-shaped limiting groove 35 is further increased. For example... Figure 12 As shown, Figure 12 When the device is overloaded, another limiting boss 34 abuts against the inner wall of one end of the arc-shaped limiting groove 35, and the gap between the limiting boss 34 and the inner wall of one end of the arc-shaped limiting groove 35 is further increased.

[0071] Example 4

[0072] like Figure 13 As shown, based on 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 support ball 41 is provided between the movable pressure plate 3 and the positioning plate 6. Track grooves can be provided on both the movable pressure plate 3 and the positioning plate 6. The support ball can be rolled in the track groove. The support ball can convert the relative sliding of the parts into rolling, reduce wear and improve the reliability of the clutch.

[0073] Example 5

[0074] Based on any of the above embodiments, such as Figure 2 As shown, the overload socket in this embodiment includes a forward-rotating overload socket 31 and a reverse-rotating overload socket 32 ​​arranged adjacent to each other or partially overlapping. The depths of both the forward-rotating overload socket 31 and the reverse-rotating overload socket 32 ​​are deeper than the depth of the first arc-shaped socket 38, but the depths of the forward-rotating overload socket 31 and the reverse-rotating overload socket 32 ​​can be the same. Figure 2 As shown, it is preferable to partially overlap the forward overload ball socket 31 and the adjacent reverse overload ball socket 32 ​​as a set of overload ball sockets. When the device experiences a forward overload, the overload steel ball 4 can slide from the first arc-shaped ball socket 38 into the forward overload ball socket 31 for overload protection; when the device experiences a reverse overload, the overload steel ball 4 can slide from the first arc-shaped ball socket 38 into the reverse overload ball socket 32 ​​for overload protection.

[0075] Example 6

[0076] Based on any of the above embodiments, such as Figures 15-17As 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 arranged at intervals corresponding to the peripheral sidewalls of the movable pressure plate 3 and 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 sidewalls of the movable pressure plate 3 and the intermediate pressure plate 2. The outer peripheral sidewall of the movable pressure plate 3 is provided with a plurality of first brake teeth 37, and the outer peripheral sidewall of the intermediate pressure plate 2 is 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 an emergency brake pawl, a support, and a drive unit, emergency braking can be performed on the movable pressure plate and the intermediate pressure plate in an emergency.

[0077] The number of first brake teeth 37 is the same as that of second brake teeth 24. When the device is under overload during forward rotation or emergency braking, the multiple first brake teeth 37 and 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, there are four first brake teeth 37 and four second brake teeth 24.

[0078] Two emergency braking claws 7 can be provided. The two emergency braking claws 7 can be fixedly connected or not fixed. The two emergency braking claws 7 are respectively arranged around the movable pressure plate 3 and the intermediate pressure plate 2.

[0079] like Figures 15-17 As shown, in a preferred embodiment, the driving unit includes a push rod 73. The driving end of the push rod 73 is hinged 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 use a cylinder, hydraulic cylinder, or telescopic motor to drive the push rod 73 to extend and retract, thereby pushing the emergency brake pawl 7 to rotate around the hinge axis 72.

[0080] A further embodiment of this invention includes a metal detection sensor and a controller, wherein the controller is electrically connected to both the metal detection sensor and the drive unit. By providing the metal detection sensor and controller, the metal detection sensor can detect whether there is a metal object at the material feed inlet, thereby controlling whether the drive unit operates. In this embodiment, the metal detection sensor and controller can be existing conventional metal detection sensors and controllers to detect metal objects, and the detection and control principle is a conventional principle.

[0081] like Figures 15-17 As shown, in a preferred embodiment, a connecting arm 793 is fixed on the support 71, the intermediate shaft 5 is a hollow structure and an output shaft 54 ​​is sleeved and fixed thereon, and the free end of the connecting arm 793 is rotatably connected to one end of the output shaft 54 ​​through a bearing 790. The connecting arm provides support for the entire device and facilitates the layout of the various components.

[0082] In this embodiment, one end of the connecting arm 793 is fixed on the support 71, and the other end is rotatably connected to the output shaft 54.

[0083] Example 7

[0084] Based on Example 6, this example provides a buffering scheme for emergency braking. For example... Figures 15-17 As shown, the support 71 is provided with a guide post 791, the central axis of which is perpendicular to the central axis of the hinge shaft 72. A guide frame 792 is movably fitted onto the free end of the guide post 791. A second disc spring 77 is provided between the guide frame 792 and the support 71. A buffer shaft 78, arranged parallel to the hinge shaft 72, is also provided on the connecting arm 793. The hinge shaft 72 and the buffer shaft 78 are movably connected by a connecting rod 794. By providing the second disc spring, guide post, and guide frame, the entire device can be buffered during emergency braking, reducing or avoiding the impact of large loads during sudden emergency stops.

[0085] Specifically, the central axis of the guide post 791 passes through the central axis of the hinge shaft 72. The connecting arm 793 can adopt a V-shaped structure, which can fix one end of the buffer shaft 78 at the corner of the V-shaped structure, while the hinge shaft 72 is located inside the corner of the V-shaped structure and arranged side by side with the buffer shaft 78. The guide frame 792 can adopt a U-shaped structure.

[0086] In this embodiment, the guide post 791 has a tapered structure. The small end of the guide post 791 is fixed to the support 71, and the large end of the guide post 791 is movably sleeved on the guide frame 792. The second disc spring 77 is sleeved on the outside of the guide post 791 and is adapted to the outer side wall of the guide post 791.

[0087] Example 8

[0088] Based on any one of Embodiments 1 to 4, this embodiment provides a harvester feeding safety protection method, which is implemented using a harvester feeding safety protection device as described above, and includes the following steps:

[0089] During normal operation, the input pressure plate 1 receives power transmitted from the input shaft 53, and drives the intermediate pressure plate 2 and the movable pressure plate 3 to rotate through the overload steel ball 4, which in turn drives the positioning plate 6 and the intermediate shaft 5 to rotate for power output.

[0090] During overload protection, the intermediate pressure plate 2 slows down 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, and the force of the first disc spring cannot keep the overload steel ball 4 in the locking ball socket 11 of the input pressure plate. The overload steel ball 4 tends to crawl out of the locking ball socket 11, pushing the movable pressure plate 3 open. The movable pressure plate 3 rotates with the overload steel ball 4, and the overload steel ball 4 falls into the overload ball socket of the movable pressure plate 3. At this time, the power between the input pressure plate 1 and the intermediate pressure plate 2 is disconnected, and power cannot be transmitted, thus playing a safety protection role. During the process of the overload steel ball 4 being squeezed out from the locking ball socket 11 under the torque of the input pressure plate 1, it 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 overload ball socket 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 to be disengaged, thus providing overload protection.

[0091] When the device returns to its original position, after the overload protection is released, the input pressure plate 1 receives the reverse power transmitted by the input shaft 53 and rotates in the opposite direction (at 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 the preset angle relative to the positioning plate 6. The overload steel ball 4 enters the first arc-shaped ball socket 38 from the overload ball socket and then locks into the locking ball socket 11 of the input pressure plate 1, so that the device returns to its original position.

[0092] The harvester feeding safety protection method of this embodiment can provide overload protection when the output shaft encounters a load greater than the clutch torque, and can also return to its original position when clearing overloaded material.

[0093] Example 9

[0094] Based on Example 5, this example provides a harvester feeding safety protection method, which is implemented using a harvester feeding safety protection device as described above, and includes the following steps:

[0095] During normal operation, the input pressure plate 1 receives power transmitted from the input shaft 53, and drives the intermediate pressure plate 2 and the movable pressure plate 3 to rotate through the overload steel ball 4, which in turn drives the positioning plate 6 and the intermediate shaft 5 to rotate for power output.

[0096] During positive overload protection, the intermediate pressure plate 2 slows down 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 positive direction. Under the torque of the input pressure plate 1, the overload steel ball 4 is squeezed out from the locking ball socket 11 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 positive rotation 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. The input pressure plate 1 and the intermediate pressure plate 2 are disengaged, and positive overload protection is performed.

[0097] 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 opposite direction (at 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 the 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 locks into the locking ball socket 11 of the input pressure plate 1, so that the device returns to its original position.

[0098] During reverse overload protection, after the device returns to its original position, the input pressure plate 1 continues to rotate in the reverse direction to discharge the overloaded material. The intermediate pressure plate 2 slows down 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 overloaded steel ball 4 is squeezed out from the locking ball socket 11 under the torque 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 overloaded 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. The input pressure plate 1 and the intermediate pressure plate 2 are disengaged, and reverse overload protection is performed.

[0099] After the reverse overload protection is activated, the blockage can be manually cleared, and the machine can return to its normal operating position by rotating forward (at low speed).

[0100] The harvester feeding safety protection method of this embodiment can provide reverse overload protection during the reverse rotation of the input shaft to discharge material.

[0101] Example 10

[0102] Based on Embodiment 6 or 7, this embodiment provides a harvester feeding safety protection method, which is implemented using a harvester feeding safety protection device as described above, and includes the following steps:

[0103] During normal operation, the input pressure plate 1 receives power transmitted from the input shaft 53, and drives the intermediate pressure plate 2 and the movable pressure plate 3 to rotate through the overload steel ball 4, which in turn drives the positioning plate 6 and the intermediate shaft 5 to rotate for power output.

[0104] During overload protection, the intermediate pressure plate 2 slows down 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. Under the torque of the input pressure plate 1, the overload steel ball 4 is squeezed out from the locking ball socket 11 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 overload ball socket of the movable pressure plate 3, causing the two ends of the return leaf spring 52 to open by a preset angle. The input pressure plate 1 and the intermediate pressure plate 2 are disengaged, and overload protection is performed.

[0105] 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 opposite direction (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 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 locks into the locking ball socket 11 of the input pressure plate 1 to return the device to its original position.

[0106] During emergency braking, for example, when the metal detection sensor at the material feeding inlet detects a metal object, the controller can analyze and control the push rod to operate, using the first and second braking teeth for braking. Specifically, the drive unit drives the emergency braking claw 7 to rotate around the hinge shaft 72 and abut against the peripheral walls of the movable pressure plate 3 and the intermediate pressure plate 2. First, the movable pressure plate 3 is braked by the first braking 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 braking tooth 24. The overloaded steel ball 4 falls into the overload ball socket (forward rotation overload ball socket) of the movable pressure plate 3. At the same time, the positioning plate 6 rotates relative to the movable pressure plate 3 by a preset angle, 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, and the overloaded steel ball 4 is squeezed out from the locking ball socket 11 under 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.

[0107] When the device returns to its original position after emergency braking, after the emergency braking is released (after the metal object is removed, the metal detection sensor detects no metal information, and the controller controls 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 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 plate 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 locks into the locking ball socket 11 of the input pressure plate 1 to return the device to its original position.

[0108] The harvester feeding safety protection method of this embodiment can provide overload protection when the output shaft encounters a load greater than the clutch torque, and can also return to its original position when clearing overloaded material; it can also provide protection during emergency braking.

[0109] In the description of this utility model, it should be understood that the terms "center", "length", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0110] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0111] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0112] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0114] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A safety protection device for feeding a harvester, characterized in that, The device includes an input pressure plate, an intermediate pressure plate, a movable pressure plate, an overload steel ball, a first disc spring, a return leaf spring, a positioning plate, and an intermediate shaft. The input pressure plate, intermediate pressure plate, movable pressure plate, positioning plate, and first disc spring are sequentially sleeved on the intermediate shaft. The return leaf spring is sleeved on the outside of the positioning plate and elastically engages and limits the positioning plate and the movable pressure plate. The input pressure plate is circumferentially 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, and the positioning plate is axially connected to the intermediate shaft. The first disc spring is limited to one side of the positioning plate. The input pressure plate has multiple locking ball sockets on one side near the middle pressure plate. The middle pressure plate has multiple ball passage channels. The movable pressure plate has multiple overload ball sockets. Adjacent overload ball sockets are connected by a first arc-shaped ball socket. The depth of the first arc-shaped ball socket is less than the depth of the overload ball socket. During normal operation, the multiple locking ball sockets, multiple ball passage channels, and multiple first arc-shaped ball sockets are arranged in a one-to-one correspondence.

2. The harvester feeding safety protection device according to claim 1, characterized in that, The positioning plate has a first positioning platform on its peripheral edge, and the movable pressure plate has a second positioning platform on one side of its peripheral edge that extends beyond a preset distance from the positioning plate. The second positioning platform and the first positioning platform are arranged radially corresponding to each other along the intermediate axis. The two ends of the return leaf spring are close together and limited on both sides of the first positioning platform and the second positioning platform.

3. The harvester feeding safety protection device according to claim 2, characterized in that, The movable pressure plate is also provided with a limiting boss on one side near the positioning plate. The peripheral edge of the positioning plate is provided with an arc-shaped limiting groove. The circumferential length of the arc-shaped limiting groove is greater than the circumferential length of the limiting boss. The limiting boss is located in the arc-shaped limiting groove.

4. The 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 sockets are connected by a second arc-shaped socket.

5. The harvester feeding safety protection device according to claim 1, characterized in that, A first limiting ring is fixed on the outer periphery of the middle pressure plate near the input pressure plate, and a first limiting step is provided on the outer periphery of the input pressure plate near the middle pressure plate. The first limiting ring is movably sleeved on the first limiting step. A second limiting ring is fixed on the outer periphery of the end of the movable pressure plate near the middle pressure plate, and a second limiting step is provided on the outer periphery of the end of the middle pressure plate near 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 sockets include forward-rotating overload sockets and reverse-rotating overload sockets arranged adjacently or partially overlapping.

7. A harvester feeding safety protection device according to any one of claims 1 to 5, characterized in that, It also includes an emergency braking claw, a support, and a drive unit. The main structure of the drive 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 which is arranged parallel to the central axis of the intermediate shaft. The braking end of the emergency braking claw is arranged at intervals with the peripheral sidewalls of the movable pressure plate and the intermediate pressure plate. The drive unit is connected to the emergency braking claw and drives the emergency braking claw to abut against the peripheral sidewalls of the movable pressure plate and the intermediate pressure plate. The outer peripheral sidewall of the movable pressure plate is provided with multiple first brake teeth, and the outer peripheral sidewall of the intermediate pressure plate is provided with multiple second brake teeth; during normal operation, the multiple first brake teeth and multiple second brake teeth are arranged in a staggered manner.

8. The harvester feeding safety protection device according to claim 7, characterized in that, The drive unit includes a push rod, the drive end of which is hinged to the side of the emergency brake pawl away from the movable pressure plate. The side of the emergency brake pawl away from the movable pressure plate is also connected to the support via a return spring.

9. The harvester feeding safety protection device according to claim 7, characterized in that, It also includes a metal detection sensor and a controller, the controller being electrically connected to the metal detection sensor and the drive unit, respectively.

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

Images