A parking mechanism and an agricultural gearbox having the same

Abstract

The present invention relates to the technical field of agricultural parking mechanisms, and specifically discloses a parking mechanism, including a braking component, wherein the braking component includes a brake cover, the front end of the brake cover is rotatably connected to a lifting rod, the inner wall of the brake cover is fixedly connected to a positioning shaft, a pair of brake shoes are rotatably connected to the positioning shaft, a pair of brake pads are arranged on the brake shoes, and a brake hub is also arranged in the brake cover. The parking mechanism provided by the present invention, through the rotation of the brake shoe, not only makes the baffle plate start to rotate to form a closed channel, but also pushes the pressure plate to rise and contact with the baffle plate, so that the push plate can start to rotate with the brake hub and push the hydraulic oil, and before the brake pad does not work, the hydraulic pressure is used to first play a braking effect, thereby solving the disadvantage of the brake pad's own braking lag, and can also cooperate with the brake pad to play a braking effect later, and it is limited to avoid the excessive friction force borne by the brake pad, the friction loss exists, and the life of the friction pad is affected.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural parking mechanisms, and particularly relates to a parking mechanism and an agricultural gearbox having the parking mechanism. Background Art

[0002] A crawler-type agricultural vehicle is a vehicle specially designed for agricultural operations, and its main feature is the use of a crawler drive system. This design enables the vehicle to travel on uneven or soft ground, reducing soil compaction and increasing traction at the same time. The agricultural gearbox used in traditional crawler-type agricultural vehicles has a built-in brake mechanism and a parking mechanism. The brake mechanism is used to stop the moving vehicle, and the parking mechanism can help the vehicle stay stationary on a slope road.

[0003] The existing parking mechanism of agricultural gearboxes uses brake pads to fit and brake against a brake drum. However, this brake pad braking is slightly lagging. For a period of time before the brake pads are in contact with the brake drum, the vehicle can still move. Even after the brake pads have been in contact with the brake drum for a period of time, due to insufficient friction, the vehicle may still move forward, and the brake pads will also experience intense friction. These two periods are the parking dead zones, and there is a lack of a mechanism to assist the brake pads in braking in advance during this time; in addition, the brake pads are constantly squeezed and rubbed against the brake drum for a long time, resulting in a limited service life of the brake pads, and there is a lack of a mechanism that can assist the brake pads in braking during parking to share the friction of the brake pads. Summary of the Invention

[0004] The purpose of the present invention is to provide a parking mechanism to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A parking mechanism includes a braking component. The braking component includes a brake cover. A lifting rod is rotatably connected to the front end of the brake cover. A positioning shaft is fixedly connected to the inner wall of the brake cover. A pair of brake shoes are rotatably connected to the positioning shaft. A pair of brake pads are provided on the brake shoes. A brake drum is also provided in the brake cover. The brake drum is connected to a transmission shaft. A bent-angle convex block is rotatably connected in the brake cover. A pushing shaft is fixedly connected to the side end of the lifting rod;

[0007] A cavity is provided in the brake drum. The cavity is filled with hydraulic oil. A flow-blocking component is provided in the cavity. The flow-blocking component includes a flow-blocking plate. During the rotation of the bent-angle convex block, the flow-blocking plate is driven to rotate, preventing the hydraulic oil from passing through one side of the flow-blocking plate;

[0008] A hydraulic auxiliary braking component is arranged inside the brake hub. The hydraulic auxiliary braking includes a liquid pushing plate and a retaining piece. The brake hub includes an outer ring and an inner ring rotatably connected to the outer ring. The liquid pushing plate is arranged on the inner ring, and the retaining piece is fixedly connected to the inner wall of the outer ring. During the rotation of the brake shoe, the liquid pushing plate and the retaining piece abut against each other, forcing the liquid pushing plate to rotate as the brake hub rotates. In cooperation with the flow blocking plate, the purpose of using hydraulic pressure to assist braking is achieved.

[0009] Further, the flow blocking component further includes a first rotating shaft rotatably connected to the inner wall of the outer ring. The inner wall of the flow blocking plate is fixedly sleeved on the outer wall of the first rotating shaft. The inner wall of the bent corner convex block is fixedly connected with a second rotating shaft. A first belt pulley is fixedly sleeved on the first rotating shaft, a second belt pulley is fixedly sleeved on the second rotating shaft, and a transmission belt is arranged on the first belt pulley and the second belt pulley.

[0010] Further, the hydraulic auxiliary braking component further includes a push rod slidably connected to the inner wall of the inner ring. The top of the push rod is fixedly connected with an arc-shaped plate. A first movable groove is formed at the bottom of the liquid pushing plate, and the arc-shaped plate slides inside the first movable groove. The top of the arc-shaped plate is fixedly connected with a push shaft, and the top of the push shaft is fixedly connected with a pressing plate. A second movable groove is formed at the top of the liquid pushing plate, and the pressing plate is slidably connected inside the second movable groove.

[0011] Further, a groove is formed on the liquid pushing plate, and the hydraulic oil flows in the groove. During the rotation of the brake shoe, the pressing plate extends and abuts against the retaining piece, so that the brake hub is subjected to the resistance of the hydraulic oil during rotation.

[0012] Further, a flow limiting component is arranged on the liquid pushing plate. The flow limiting component includes a first baffle and a second baffle. Both the first baffle and the second baffle are slidably connected inside the groove. Initially, both the first baffle and the second baffle are located in the middle position of the groove. During the movement of the liquid pushing plate, the first baffle is driven to move upward and the second baffle to move downward, or the first baffle to move downward and the second baffle to move upward until the groove is blocked.

[0013] Further, the flow limiting component further includes a liquid guiding plate fixedly connected to the inner wall of the groove. A driving rod is rotatably connected to the groove. A plurality of blades are fixedly connected to the driving rod. A first lead screw is threadedly connected inside the first baffle, and a second lead screw is threadedly connected inside the second baffle. A transmission component is arranged at the bottom of the driving rod. During the flow of the liquid, the first lead screw and the second lead screw are rotated, and the first baffle and the second baffle are driven to move through the transmission component.

[0014] Further, the transmission component includes a first transmission gear fixedly sleeved on the outer end of the first lead screw, a second transmission gear fixedly sleeved on the outer end of the second lead screw, the first transmission gear is meshed and connected with the second transmission gear, a first friction wheel is further fixedly sleeved on the outer end of the second lead screw, a second friction wheel is fixedly sleeved on the outer end of the drive rod, a friction belt is sleeved on the first friction wheel and the second friction wheel, and a spring roll is further sleeved on the drive rod.

[0015] Further, the push rod is of a telescopic structure and is internally provided with an elastic mechanism, and a reset member is arranged on the inner ring.

[0016] An agricultural gearbox having the parking mechanism includes the parking mechanism, and is characterized in that it includes a gearbox body, the gearbox body includes a housing, a gear set is arranged inside the housing, the gear set includes an output gear, an output shaft is fixedly sleeved on the output gear, and the output shaft is fixedly connected with a brake hub.

[0017] In the above technical solution, the beneficial effects of the parking mechanism provided by the present invention are as follows:

[0018] Through the rotation of the brake shoe, not only does the baffle start to rotate to form a closed channel, but also the pressing plate is pushed upward to abut against the retaining piece, so that the liquid pushing plate can start to rotate following the brake hub and push the hydraulic oil. Before the brake pads come into effect, the hydraulic pressure is used to achieve the braking effect first, thereby solving the disadvantage of the braking lag of the brake pads themselves. Subsequently, it can also cooperate with the brake pads to achieve the braking effect, effectively avoiding excessive friction borne by the brake pads, frictional loss, and affecting the service life of the friction pads.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a comprehensive disclosure of all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall internal structure of the agricultural gearbox of the present invention having the parking mechanism;

[0023] Figure 2Schematic diagram of the external structure of the output shaft for the agricultural transmission with the parking mechanism of the present invention;

[0024] Figure 3 Schematic diagram of the internal structure of the brake cover for the parking mechanism of the present invention;

[0025] Figure 4 Schematic diagram of the internal structure of the brake hub for the parking mechanism of the present invention;

[0026] Figure 5 Schematic diagram of the sectional structure of the brake hub for the parking mechanism of the present invention;

[0027] Figure 6 For the parking mechanism of the present invention Figure 5 Schematic diagram of the enlarged structure at position A;

[0028] Figure 7 Schematic diagram of the specific structure of the brake hub for the parking mechanism of the present invention;

[0029] Figure 8 Schematic diagram of the external structure of the liquid pushing plate for the parking mechanism of the present invention;

[0030] Figure 9 Schematic diagram of the sectional structure of the liquid pushing plate for the parking mechanism of the present invention;

[0031] Figure 10 Schematic diagram of the structure of the flow limiting component for the parking mechanism of the present invention;

[0032] Figure 11 Schematic diagram of the structure of the transmission component for the parking mechanism of the present invention.

[0033] Explanation of reference numerals:

[0034] 1. Transmission body; 11. Housing; 12. Gear set; 13. Output shaft; 14. Output gear; 2. Braking component; 21. Brake cover; 22. Lifting rod; 23. First return spring; 24. Positioning shaft; 25. Brake shoe; 26. Brake pad; 27. Brake hub; 271. Inner ring; 272. Outer ring; 28. Bent corner bump; 29. Pushing shaft; 210. Second return spring; 3. Hydraulic auxiliary braking component; 31. Cavity; 32. Liquid pushing plate; 33. Push rod; 34. Flap; 35. Pushing shaft; 36. Second moving slot; 37. Arc plate; 38. Pressing plate; 4. Flow blocking component; 41. First rotating shaft; 42. Flow blocking plate; 43. Second rotating shaft; 44. First pulley; 45. Second pulley; 46. Transmission belt; 5. Flow limiting component; 51. First baffle; 52. Second baffle; 53. First lead screw; 54. Second lead screw; 56. Liquid guiding plate; 57. Driving rod; 58. Blade; 6. Transmission component; 61. First transmission gear; 62. Second transmission gear; 63. First friction wheel; 64. Second friction wheel; 65. Friction belt; 66. Spring coil. Detailed implementation mode

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0036] Please refer to Figure 3-4 , a parking mechanism, including a braking component 2, the braking component 2 includes a brake cover 21, a lifting rod 22 is rotatably connected to the front end of the brake cover 21, a positioning shaft 24 is fixedly connected to the inner wall of the brake cover 21, a pair of brake shoes 25 are rotatably connected to the positioning shaft 24, a pair of brake pads 26 are arranged on the brake shoes 25, a brake hub 27 is further arranged in the brake cover 21, the brake hub 27 is connected to the transmission shaft, a bent corner bump 28 is rotatably connected in the brake cover 21, and a pushing shaft 29 is fixedly connected to the side end of the lifting rod 22;

[0037] Please refer to Figure 5-7, a cavity 31 is provided inside the brake hub 27, the inside of the cavity 31 is filled with hydraulic oil, a flow resistance component 4 is provided inside the cavity 31, the flow resistance component 4 includes a flow resistance plate 42, and during the rotation of the bent corner bump 28, the flow resistance plate 42 is driven to rotate to prevent the hydraulic oil from passing through one side of the flow resistance plate 42; a hydraulic auxiliary braking component 3 is provided inside the brake hub 27, the hydraulic auxiliary braking component 3 includes a liquid pushing plate 32 and a retaining piece 34, the brake hub 27 includes an outer ring 272 and an inner ring 271 rotatably connected to the outer ring 272, the liquid pushing plate 32 is arranged on the inner ring 271, the retaining piece 34 is fixedly connected to the inner wall of the outer ring 272, during the rotation of the brake shoe 25, the liquid pushing plate 32 and the retaining piece 34 are in mutual contact, forcing the brake hub 27 to drive the liquid pushing plate 32 to rotate during rotation, and cooperating with the flow resistance plate 42 to achieve the purpose of auxiliary braking by using hydraulic pressure.

[0038] Specifically, the brake cover 21 includes a cover body and a front cover, the front cover is detachably connected to the cover body through bolts, an arc-shaped groove is provided on the front cover, the pushing shaft 29 is movably arranged inside the arc-shaped groove, a circular hole is provided on the lifting rod 22, a first return spring 23 is arranged on the circular hole, the bottom hook of the first return spring 23 is hooked inside the circular hole, and the top hook is hooked at the outer end of the front cover, and a pair of second return springs 210 are fixedly connected between a pair of brake shoes 25.

[0039] Specifically, the driving force for the rotation of the lifting rod 22 depends on the power driven by hydraulic pressure (this is the prior art and will not be elaborated here).

[0040] When the vehicle stops, due to the vehicle being on a slope, under the action of gravity, the vehicle will still move. At this time, the lifting rod 22 is lifted, the brake pad 26 approaches the brake hub 27. During this process, the flow resistance plate 42 starts to rotate, and the liquid pushing plate 32 has already started to rotate following the brake hub 27 and pushes the hydraulic oil. Before the brake pad 26 comes into effect, the hydraulic pressure is used to achieve the braking effect first, thereby solving the disadvantage of the braking lag of the brake pad 26 itself.

[0041] In the further provided embodiment of the present invention, the flow resistance component 4 further includes a first rotating shaft 41 rotatably connected to the inner wall of the outer ring 272, the inner wall of the flow resistance plate 42 is fixedly sleeved with the outer wall of the first rotating shaft 41, the inner wall of the bent corner bump 28 is fixedly connected with a second rotating shaft 43, a first pulley 44 is fixedly sleeved on the first rotating shaft 41, a second pulley 45 is fixedly sleeved on the second rotating shaft 43, a transmission belt 46 is arranged on the first pulley 44 and the second pulley 45, and both the first pulley 44 and the second pulley 45 are in transmission connection with the transmission belt 46.

[0042] Please refer to Figure 8-9Furthermore, the hydraulically assisted braking component 3 also includes a push rod 33 slidably connected to the inner wall of the inner ring 271, the top of the push rod 33 is fixedly connected to an arc plate 37, the bottom of the liquid pushing plate 32 is provided with a first movable groove, the arc plate 37 slides inside the first movable groove, the top of the arc plate 37 is fixedly connected to a push shaft 35, the top of the push shaft 35 is fixedly connected to a pressure plate 38, the top of the liquid pushing plate 32 is provided with a second movable groove 36, and the pressure plate 38 is slidably connected to the inside of the second movable groove 36.

[0043] Furthermore, a groove is formed on the push plate 32, and hydraulic oil flows in the groove. During the rotation of the brake shoe 25, the pressure plate 38 extends and contacts the baffle 34, so that the brake hub 27 is subjected to resistance of the hydraulic oil during the rotation.

[0044] Specifically, the outer end of the baffle 34 is arc-shaped, which is adapted to the inner wall of the outer ring 272. The top of the pressure plate 38 is provided with an arc chamfer, which is adapted to the baffle 34. The liquid pushing plate 32 is slidably connected to the inner wall of the inner ring 271. A protrusion is provided at the outer end of the brake shoe 25 near the positioning shaft 24.

[0045] Initially, the brake hub 27 rotates together with the car wheel. At this time, the pressure plate 38 is retracted in the second movable groove 36. During the rotation of the outer ring 272, the fluid pushing plate 32 will not be pushed to rotate. The fluid pushing plate 32 and the inner ring 271 are relatively stationary. When the lifting rod 22 is rotated, the angle protrusion 28 starts to rotate, and the protrusion is used to expand a pair of brake shoes 25 outward.

[0046] On the one hand, when the angled projection 28 rotates, it first rotates with the first pulley 44, and then rotates with the second pulley 45 by means of the transmission belt 46, thereby rotating the baffle 42 to prevent the liquid from flowing.

[0047] On the other hand, during the rotation of the brake shoe 25, the push rod 33 is moved by the convex block, the push rod 33 pushes the arc plate 37 to move, and the arc plate 37 pushes the push shaft 35 to move, so that the pressure plate 38 moves outward and is resisted by the rotating baffle 34, thereby driving the liquid push plate 32 to rotate, so that the liquid provides rotation resistance to the outer ring 272.

[0048] The push rod 33 is a telescopic structure and is provided with an elastic mechanism therein. A reset member is fixedly connected between the inner ring 271 and the brake cover 21 . The reset member is an elastic rope. A pressure spring is fixedly connected between the bottom of the pressure plate 38 and the inner wall of the second movable groove 36 .

[0049] When the brake shoe 25 is released, the push rod 33 will gradually reset due to the lack of resistance from the brake pad 26, and the pressure plate 38 will also retract into the second movable groove 36 under the action of the pressure spring. Then, the pressure from the baffle 34 is lost, and under the action of the reset member, the inner ring 271 and the push plate 32 return to their initial positions.

[0050] The push rod 33 is a telescopic mechanism, including an outer rod and an inner rod. The outer rod slides inside the inner rod, and a compression spring is provided inside the inner rod, so that the push rod 33 can be telescopic. In the process of following the rotation of the outer ring 272, since the brake pad 26 is close to the inner ring 271, it will always press against the push rod 33, so that the push rod 33 can also keep pushing the pressure block to expose the second movable groove 36 and contact with the blocking plate 34.

[0051] See also Figure 10-11 In an embodiment further provided by the present invention, a flow limiting component 5 is provided on the liquid pushing plate 32, and the flow limiting component 5 includes a first baffle plate 51 and a second baffle plate 52. The first baffle plate 51 and the second baffle plate 52 are both slidably connected to the inside of the groove. The first baffle plate 51 and the second baffle plate 52 are initially located in the middle of the groove. During the activity of the liquid pushing plate 32, the first baffle plate 51 is driven to move upward and the second baffle plate 52 is driven to move downward, or the first baffle plate 51 is driven to move downward and the second baffle plate 52 is driven to move upward until the groove is blocked.

[0052] The flow limiting component 5 also includes a liquid guide plate 56 fixedly connected to the inner wall of the groove, a driving rod 57 is rotatably connected to the groove, a plurality of blades 58 are fixedly connected to the driving rod 57, the first baffle plate 51 is internally threadedly connected to the first screw rod 53, the second baffle plate 52 is internally threadedly connected to the second screw rod 54, and a transmission component 6 is provided at the bottom of the driving rod 57. During the flow of liquid, the first screw rod 53 and the second screw rod 54 are rotated, and the first baffle plate 51 and the second baffle plate 52 are driven to start moving through the transmission component 6.

[0053] The transmission component 6 includes a first transmission gear 61 fixedly sleeved on the outer end of the first screw rod 53, a second transmission gear 62 fixedly sleeved on the outer end of the second screw rod 54, the first transmission gear 61 is meshingly connected with the second transmission gear 62, a first friction wheel 63 is also fixedly sleeved on the outer end of the second screw rod 54, a second friction wheel 64 is fixedly sleeved on the outer end of the driving rod 57, a friction belt 65 is sleeved on the first friction wheel 63 and the second friction wheel 64, and a spring roll 66 is also sleeved on the driving rod 57.

[0054] Specifically, a working chamber is opened inside the liquid pushing plate 32, and the transmission component 6 is arranged inside the working chamber. One end of the spring roll 66 is fixedly connected to the outer wall of the driving rod 57, and the other end is fixedly connected to the inner wall of the working chamber, so that the driving rod 57 is always subjected to the reset force of the spring roll 66 during the rotation process.

[0055] During the movement of the liquid pushing plate 32, the liquid impacts the blade 58, causing the driving rod 57 to rotate slowly. The bottom of the driving rod 57 is sleeved with a second friction wheel 64, and the second friction wheel 64 rotates with the first friction wheel 63 by means of a friction belt 65. Therefore, the driving rod 57 and the second screw rod 54 have the same rotation direction. Since the first transmission gear 61 is meshed with the second transmission gear 62, the first screw rod 53 and the second screw rod 54 have opposite directions. Therefore, no matter whether the liquid pushing plate 32 rotates clockwise or counterclockwise, it can be ensured that the rotation directions of the first screw rod 53 and the second screw rod 54 are opposite. Therefore, under the rotation of the first screw rod 53 and the second screw rod 54, the first baffle plate 51 and the second baffle plate 52 move in an staggered manner. For example, when the first baffle plate 51 moves downward, the second baffle plate 52 moves upward, or vice versa. At this time, during the movement of the liquid pushing plate 32, the purpose of blocking the groove can be achieved by the first baffle plate 51 and the second baffle plate 52.

[0056] The above structure makes the hydraulic resistance provided by the push plate 32 for the rotation of the brake hub 27 gradually increase, and ultimately not only can it solve the problem of brake hysteresis of the brake pad 26 itself, but it can also cooperate with the brake pad 26 for braking, effectively avoiding excessive friction on the brake pad 26, which limits its service life; not only that, due to the excessive pressure required for braking, a depression will be formed in the contact area between the brake pad 26 and the brake hub 27, and by blocking the groove of the push plate 32, the oil pressure in one of the brake pad 26 areas is increased, and the increase in oil pressure there will form a uniform thrust on the surrounding area, and this thrust is not only related to the pressure of the brake pad 26, but also to the friction between the brake pad 26 and the brake hub 27. The mutual clamping increases the friction of the brake pad 26, thereby improving the braking effect of the brake pad 26. At the same time, it also serves as a counterforce to each other, providing a counterthrust to the area that should have formed a recessed area, resulting in a reduction in the phenomenon of recessed areas. Not only that, since the hydraulic oil can evenly distribute the pressure, the contact area with the greatest pressure between the brake pad 26 and the brake hub 27 is no longer the maximum stress point, but is evenly distributed to all areas of the brake hub 27 that are in contact with the semi-zone hydraulic oil. Finally, it is worth mentioning that the hydraulic oil can absorb heat. When the friction pad and the brake hub 27 generate heat, the hydraulic oil can also absorb the heat in time to cool the friction area.

[0057] See also Figure 1-2 An agricultural gearbox with the parking mechanism includes the above-mentioned parking mechanism, including a gearbox body 1, the gearbox body 1 includes a shell 11, a gear set 12 is arranged inside the shell 11, the gear set 12 includes an output gear 14, an output shaft 13 is fixedly sleeved on the output gear 14, and the output shaft 13 is fixedly connected to the brake hub 27.

[0058] The gearbox is provided with a hydraulic drive mechanism, and the hydraulic drive mechanism is manually controlled to provide sufficient rotational force for the lifting rod, so that the brake pads 26 are closely attached to the brake hub 27. The gearbox has a built-in brake mechanism that can automatically disconnect the output shaft 13. This parking mechanism is only used to prevent the agricultural crawler vehicle from slipping on a slope. When the vehicle starts to slip, the parking brake can be applied by lifting the lifting rod 22 and using the brake pads 26.

[0059] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A parking mechanism, comprising a brake component (2), wherein the brake component (2) comprises a brake cover (21), a front end of the brake cover (21) being rotatably connected to a lifting rod (22), characterized in that: The inner wall of the brake cover (21) is fixedly connected to a positioning shaft (24), a pair of brake shoes (25) are rotatably connected to the positioning shaft (24), a pair of brake pads (26) are arranged on the brake shoes (25), a brake hub (27) is also arranged in the brake cover (21), the brake hub (27) is connected to the transmission shaft, a bent angle protrusion (28) is rotatably connected in the brake cover (21), and a driving shaft (29) is fixedly connected to the side end of the lifting rod (22); The brake hub (27) is provided with a cavity (31), the cavity (31) is filled with hydraulic oil, a flow blocking component (4) is provided in the cavity (31), the flow blocking component (4) includes a flow blocking plate (42), and the angled protrusion (28) rotates with the flow blocking plate (42) during rotation, thereby preventing the hydraulic oil from passing through one side of the flow blocking plate (42); A hydraulic auxiliary brake component (3) is arranged in the brake hub (27), and the hydraulic auxiliary brake component (3) includes a fluid pushing plate (32) and a baffle (34). The brake hub (27) includes an outer ring (272) and an inner ring (271) rotatably connected to the outer ring (272). The fluid pushing plate (32) is arranged on the inner ring (271), and the baffle (34) is fixedly connected to the inner wall of the outer ring (272). During the rotation of the brake shoe (25), the fluid pushing plate (32) and the baffle (34) are in conflict with each other, forcing the brake hub (27) to rotate with the fluid pushing plate (32) during the rotation, and cooperate with the baffle (42) to use hydraulic pressure to assist braking; The flow-blocking component (4) further comprises a first rotating shaft (41) rotatably connected to the inner wall of the outer ring (272); the inner wall of the flow-blocking plate (42) is fixedly sleeved with the outer wall of the first rotating shaft (41); the inner wall of the angled protrusion (28) is fixedly connected to a second rotating shaft (43); a first belt pulley (44) is fixedly sleeved on the first rotating shaft (41); a second belt pulley (45) is fixedly sleeved on the second rotating shaft (43); and a transmission belt (46) is provided on the first belt pulley (44) and the second belt pulley (45); The hydraulic auxiliary brake component (3) further comprises a push rod (33) slidably connected to the inner wall of the inner ring (271); the top of the push rod (33) is fixedly connected to an arc plate (37); the bottom of the liquid pushing plate (32) is provided with a first movable groove; the arc plate (37) slides inside the first movable groove; the top of the arc plate (37) is fixedly connected to a push shaft (35); the top of the push shaft (35) is fixedly connected to a pressure plate (38); the top of the liquid pushing plate (32) is provided with a second movable groove (36); the pressure plate (38) is slidably connected inside the second movable groove (36).

2. The parking mechanism according to claim 1, characterized in that: The push plate (32) is provided with a groove, and the hydraulic oil flows in the groove. During the rotation of the brake shoe (25), the pressure plate (38) extends and contacts the baffle (34), so that the brake hub (27) is subjected to resistance from the hydraulic oil during the rotation.

3. The parking mechanism according to claim 2, characterized in that: A flow limiting component (5) is provided on the liquid pushing plate (32), and the flow limiting component (5) comprises a first baffle (51) and a second baffle (52), the first baffle (51) and the second baffle (52) are both slidably connected to the inside of the groove, and the first baffle (51) and the second baffle (52) are initially located in the middle of the groove. During the movement of the liquid pushing plate (32), the first baffle (51) is driven to move upward and the second baffle (52) is driven to move downward, or the first baffle (51) is driven to move downward and the second baffle (52) is driven to move upward until the groove is blocked.

4. The parking mechanism according to claim 3, characterized in that: The flow limiting component (5) further comprises a liquid guide plate (56) fixedly connected to the inner wall of the groove; a driving rod (57) is rotatably connected to the groove; a plurality of blades (58) are fixedly connected to the driving rod (57); a first screw rod (53) is internally threadedly connected to the first baffle plate (51); a second screw rod (54) is internally threadedly connected to the second baffle plate (52); a transmission component (6) is provided at the bottom of the driving rod (57); during the flow of liquid, the first screw rod (53) and the second screw rod (54) are rotated, and the first baffle plate (51) and the second baffle plate (52) are driven to start moving through the transmission component (6).

5. The parking mechanism according to claim 4, characterized in that: The transmission component (6) comprises a first transmission gear (61) fixedly sleeved on the outer end of the first screw rod (53); the outer end of the second screw rod (54) is fixedly sleeved with a second transmission gear (62); the first transmission gear (61) and the second transmission gear (62) are meshingly connected; the outer end of the second screw rod (54) is also fixedly sleeved with a first friction wheel (63); the outer end of the driving rod (57) is fixedly sleeved with a second friction wheel (64); the first friction wheel (63) and the second friction wheel (64) are sleeved with friction belts (65); and the driving rod (57) is also sleeved with a spring (66).

6. The parking mechanism according to claim 5, characterized in that: The push rod (33) is a telescopic structure and is provided with an elastic mechanism therein, and a reset member is provided on the inner ring (271).

7. An agricultural transmission with the parking mechanism, comprising the parking mechanism according to any one of claims 1 to 6, characterized in that: The invention comprises a gearbox body (1), wherein the gearbox body (1) comprises a shell (11), a gear set (12) is arranged inside the shell (11), the gear set (12) comprises an output gear (14), an output shaft (13) is fixedly sleeved on the output gear (14), and the output shaft (13) is fixedly connected to a brake hub (27).

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