Wet brake structure

Abstract

The invention discloses a wet brake structure in the field of braking, which comprises a rocker arm assembly for driving a brake pressure plate to rotate and a reset assembly for driving the brake pressure plate to reset after rotating, the reset assembly and the rocker arm assembly are detachably mounted on a shell and extend into the shell to act on the brake pressure plate in the shell, and the rocker arm assembly and the reset assembly are detachably mounted on the shell. The brake pressure plate and the wet clutch are arranged in the shell, and the brake pressure plate is located on the surface of the wet clutch. The shell is installed outside the gearbox for use, and rotation of the brake pressure plate is converted into radial movement of the brake pressure plate through the ball vortex and the steel balls. The wet brake structure is composed of a plurality of unitized assemblies, the assemblies are detachably installed, the later maintenance cost is low, the internal single assembly can be replaced, the structure is simple and compact, the wet brake structure is an externally-hung structure and has good heat dissipation performance, work of the brake pressure plate is carried out in the shell, and the brake pressure plate is not prone to falling off. External foreign matters are prevented from influencing the braking effect of the whole structure.

Description

Technical Field

[0001] The present invention relates to the field of brake structures, in particular to a wet brake structure. Background Art

[0002] With the development of domestic agriculture, tractor operations face heavy loads and long continuous working hours. Dry brake performance is significantly affected by the environment, primarily due to overheating. During downhill or heavy-load operation, frictional heat generation can easily cause a sudden increase in brake pressure plate temperature, leading to thermal decay, a significant decrease in braking force, or even failure. Humidity / mud impacts: During farmland operations, water, mud, or crop residue can adhere to the brake surface, reducing the friction coefficient and causing braking delays or slippage. In severe cases, this can lead to problems such as brake lock. Dry brakes rely on mechanical friction, resulting in rapid wear of friction pads, dust accumulation, and high maintenance costs.

[0003] Among them, the wet clutch pack is a device used to transmit or cut off torque, consisting of steel plates and friction plates. Summary of the Invention

[0004] The purpose of the present invention is to provide a wet brake structure, which includes a plurality of unitized components that are detachable, has low subsequent maintenance costs, is used outside a gearbox, and has a good heat dissipation effect.

[0005] In order to solve the above technical problems, the following technical solutions are adopted: The present invention provides a wet brake structure, comprising a rocker arm assembly for driving a brake pressure disc to rotate and a reset assembly for driving the brake pressure disc to reset after the rotation. The reset assembly and the rocker arm assembly are detachably mounted on a housing and extend into the housing to act on the brake pressure disc within the housing. The brake pressure disc and a wet clutch pack are disposed within the housing, and the brake pressure disc is located on the surface of the wet clutch. The housing is installed outside the gearbox, and the transmission shaft of the gearbox is arranged through the housing and is installed in conjunction with the wet clutch pack inside the housing. The brake pressure disc and the interior of the outer shell are both provided with a vortex, and a steel ball is provided on the vortex. The rotation of the brake pressure disc is converted into radial movement of the brake pressure disc through the vortex and the steel ball, thereby pushing the structures in the wet clutch package to combine with each other and realize the braking effect.

[0006] Optionally, the rocker arm assembly includes a rocker arm, a connecting rod and a shift head, the shift head is installed in the middle of the connecting rod, the rocker arm is arranged at one end of the connecting rod, the connecting rod is installed in the rocker arm hole of the housing, and the connecting rod is also provided with radial oil seal 1, radial oil seal 2, bearing 1, bearing 2 and a gasket, the radial oil seal 1 is located between the bearing 1 and the rocker arm, and the radial oil seal 2 is located between the bearing 2 and the gasket.

[0007] Optionally, the connecting rod is spline-connected to the shift head.

[0008] Optionally, the outer shell includes a shell and an end cover, the shell and the end cover are connected by fixing bolts, a vortex is provided at the bottom inner of the shell, the vortex cooperates with the steel ball part, several vortexes are arranged in a ring-shaped uniform interval, and a tension spring bolt hole is also provided on the outer periphery of the vortex, several tension spring bolt holes are arranged in a ring-shaped uniform interval, the tension spring bolt hole is used to install the reset assembly, and an axial hole is provided on the shell, and the transmission shaft is connected to the wet clutch pack through the axial hole.

[0009] Optionally, the housing end cover is mounted in cooperation with the housing via fixing bolts, the end cover is provided with an axial hole for passing the transmission shaft, and the end cover is also provided with a mounting groove for mounting an O-ring 2.

[0010] Optionally, the reset assembly includes a tension spring bolt, a return tension spring and an O-ring. One end of the return tension spring has a hook, and the hook is arranged on the brake pressure disc. A gasket is provided between the tension spring bolt and the outer surface of the shell. The O-ring is located between the inner surface of the shell and the return tension spring.

[0011] Optionally, the brake pressure disc is an annular structure, and branch one and branch two are provided on the outer periphery of the annular structure. Branch one is provided with a dial head groove that cooperates with the rocker arm assembly, and several branches two are evenly spaced and arranged on the outer wall of the brake pressure disc. Branch two is provided with a tension spring groove for cooperating with the reset assembly.

[0012] Optionally, a second spherical vortex is provided on the brake pressure disc, and a plurality of the second spherical vortexes are arranged in a ring-shaped and evenly spaced manner on the surface of the brake pressure disc. The second spherical vortex includes a vortex hole that cooperates with the steel ball part and an extension platform on the side of the vortex hole. The extension platform is higher than the height of the vortex hole, and the extension platform is a curved surface structure that gradually rises on one side of the vortex hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The wet brake structure provided by the present invention is composed of several unitized components, which are detachably installed, with low subsequent maintenance costs. The internal individual components are replaceable, and the structure is simple and compact. The wet brake structure is an external structure and is installed on the outside of the gearbox for use. It has good heat dissipation and does not require the design of a forced lubrication mechanism. The reset component is separately designed and installed on the outer shell, which effectively reduces the casting difficulty of the external shell, reduces the overall thickness of the brake structure, and thus reduces the overall space of the brake structure. The brake pressure disc works inside the outer shell, preventing external foreign matter from affecting the braking effect of the entire structure.

[0014] 2. The connecting rod and the shifter in the rocker arm assembly of the wet brake structure provided by this invention are connected by a spline. The shifter achieves rotational force transmission through the meshing of the spline teeth. Compared with traditional tie rod structures, this structure is compact and can be used in narrow spaces. It also has low wear and long service life. It can synchronously transmit torque, avoiding the idle travel and flexible deformation problems of traditional tie rods.

[0015] 3. The wet brake structure provided by the present invention is provided with a radial oil seal and an O-ring to seal the internal structure of the housing to prevent the entry of external foreign matter and ensure the braking function of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of the overall structure of the wet brake structure in an embodiment of the present invention; Figure 2 2. It is a schematic diagram of the disassembled structure of the wet brake structure in an embodiment of the present invention; Figure 3 is a partial structural diagram of a wet brake structure according to an embodiment of the present invention; Figure 4 1 is a schematic structural diagram of a rocker arm assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the housing structure in an embodiment of the present invention; Figure 6 2 is a schematic diagram of the structure of a reset component in an embodiment of the present invention; Figure 7 This is one of the schematic diagrams of the brake pressure disc structure in an embodiment of the present invention; Figure 8 This is the second schematic diagram of the brake pressure disc structure in an embodiment of the present invention; Figure 9 Schematic diagram of the end cover structure in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Rocker arm assembly; 101. Rocker arm; 102. Connecting rod; 103. Radial oil seal 1; 104. Radial oil seal 2; 105. Bearing 1; 106. Bearing 2; 107. Dial head; 108. Washer; 2. Housing; 201. Shaft hole; 202. Ball vortex 1; 203. Tension spring bolt hole; 204. Mounting hole; 205. Through hole; 3. Reset assembly; 301. Tension spring bolt; 302. Return spring; 303. O-ring 1; 4. Brake pressure plate; 401. Branch 1; 402. Dial head slot; 403. Ball vortex 2; 404. Steel ball; 405. Branch 2; 406. Tension spring slot; 5. Wet clutch pack; 6. End cover; 601. Shaft hole; 602. O-ring 2; 603. Fixing bolt. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention, its application, or use.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0020] Example 1

[0021] like Figure 1 、 Figure 2As shown, this embodiment provides a wet brake structure, including a rocker arm assembly 1, a housing, a reset assembly 3, a brake pressure disc 4 and a wet clutch. The rocker arm assembly 1 is used to drive the brake pressure disc 4 to rotate, and the reset assembly 3 is used to drive the brake pressure disc 4 to reset after rotation. The rocker arm assembly 1 and the reset assembly 3 are both detachably mounted on the housing and both act on the brake pressure disc 4. A vortex is provided on the brake pressure disc 4 and the bottom inner of the housing. A steel ball is provided in the vortex. The upper and lower ends of the steel ball are respectively provided in the vortexes on the brake pressure disc 4 and the bottom inner of the housing. An extension platform higher than the vortex hole is also provided on the vortex of the brake pressure disc 4. When the steel ball 404 is located in the vortex hole, the wet clutch pack below the brake pressure disc 4 is not engaged. When the steel ball 404 is located on the extension platform of the brake pressure disc 4, the brake pressure disc 4 moves downward, thereby pushing the steel plate and friction plate in the wet clutch pack to engage with each other, thereby achieving a braking effect.

[0022] like Figure 3 As shown, the dial head 107 of the rocker arm assembly 1 acts on the brake pressure disc 4. The rocker arm assembly 1 is connected to the driving device outward. When the dial head 107 thereon is driven, the brake pressure disc 4 is driven to rotate, so that the steel ball 404 moves relative to the brake pressure disc 4 to the extension platform. Since the height of the extension platform is higher than the inside of the vortex hole, the brake pressure disc 4 is pushed downward, realizing the conversion of the rotation of the brake pressure disc 4 into the radial movement of the brake pressure disc 4.

[0023] The reset assembly 3 includes a return spring 302, one end of which acts on the brake pressure disc 4. When the brake pressure disc 4 rotates a certain angle and moves downward a certain distance, the return spring 302 is stretched. When the rotational force on the rocker arm 101 is cancelled, the rebound force of the return spring 302 acts on the brake pressure disc 4, so that the brake pressure disc 4 returns to its original state, and the steel ball 404 is located in the vortex hole of the two vortices.

[0024] The outer shell is installed on the outside of the gearbox so that when in use, the wet brake structure dissipates heat through external ventilation, which has a good heat dissipation effect and does not require the design of a forced lubrication mechanism. The transmission shaft of the gearbox passes through the outer shell and is installed in conjunction with the wet clutch pack in the outer shell.

[0025] The wet brake structure provided in this embodiment is simple and compact. The several structures that make up the wet brake structure are all designed as separate modular units and can be detachably installed with each other, saving manpower and material resources during later maintenance and replacement. The rotation of the brake pressure disc 4 is converted into radial movement of the brake pressure disc 4 through the vortex and the steel ball 404. By setting the reset component 3, the brake pressure disc 4 is reset after rotation and the brake is released.

[0026] Example 2

[0027] like Figure 2 、 Figure 3 、 Figure 5 As shown, this embodiment provides a wet brake structure based on the first embodiment, wherein the outer shell includes a shell 2 and an end cover 6, the shell 2 is provided with a branch for mounting the rocker arm assembly 1 and an annular portion for mounting other components, the upper and lower end faces of the branch are closed, a through hole 205 is provided on the branch running vertically, one end face of the annular portion is open, the inner cavity is communicated with the inner cavity of the branch, the open end of the annular portion is sealed and installed by the end cover 6, an axial hole 201 is provided in the middle of the unopened end face of the annular portion, a plurality of vortexes 202 are provided on the inner wall of the end face, a tension spring bolt 203 penetrating the end face of the shell 2 is provided on the outer periphery of the vortex 202, a mounting hole 204 is provided on the edge of the end face of the opening of the annular portion, and the end cover 6 is installed at the open end of the annular portion through the mounting hole on the end cover 6 and the mounting hole 204 on the annular portion by a fixing bolt 603.

[0028] like Figure 2 、 Figure 9 As shown, the end cover 6 is mounted on the opening of the housing 2 by means of fixing bolts 603 to achieve sealing of the brake pressure disc 4, reset assembly 3 and wet clutch pack 5 inside the housing 2. A mounting groove is provided on the end cover 6, and an O-ring 2 602 is provided in the mounting groove. The O-ring 2 602 is used to achieve sealing installation between the housing 2 and the end cover 6. The shaft hole 601 on the end cover is used to pass the transmission shaft of the gearbox. The entire wet brake structure is an external structure with good heat dissipation effect.

[0029] like Figure 3 、 Figure 4 、 Figure 5 As shown, the rocker arm assembly 1 also includes a connecting rod 102 and a shift head 107. The rocker arm 101 is arranged at one end of the connecting rod 102, and the shift head 107 is arranged in the middle of the connecting rod 102. The connecting rod 102 is mounted on the through hole 205 of the housing 2 through a bearing 105 and a bearing 2 106. The rocker arm 101 is located outside the housing 2. A radial oil seal 103, a radial oil seal 2 104 and a gasket 108 are also provided on the connecting rod 102. The connecting rod 102 is connected to the through hole 205 on the housing 2 through two bearings. The two radial oil seals are respectively sleeved on both ends of the connecting rod 102 and are located in the housing. Within the upper and lower ends of housing 2, radial oil seal 103 is positioned between bearing 105 and rocker arm 101. Radial oil seal 2 104 is positioned between washer 108 and bearing 2 106. Washer 108 is positioned between the end face of housing 2 and one end of connecting rod 102. Washer 108 and rocker arm 101 are located at the upper and lower ends of connecting rod 102 and on the outer end face of housing 2, respectively. Washer 108 and rocker arm 101 protect the two oil seals and reduce external impact. The two radial oil seals form a rotary seal for connecting rod 102, preventing external impurities from entering housing 2. Both bearings are self-lubricating composite bearings.

[0030] The shifter head 107 and connecting rod 102 are connected by a spline. The spline connection is achieved by meshing the spline grooves on the connecting rod 102 with the spline teeth on the shifter head 107. The meshing of the spline teeth transmits force. Compared with traditional tie rod structures, this structure is compact and can be used in narrow spaces. It also has low wear and long service life. It can also synchronously transmit torque, avoiding the idle travel and flexible deformation problems of traditional tie rods.

[0031] like Figure 3 、 Figure 7 As shown, three reset components 3 are provided, including a tension spring bolt 301, a return tension spring 302 and an O-ring 303. The tension spring bolt 301 is installed on the housing 2, and the return tension spring 302 is sleeved on the tension spring bolt 301. A gasket is provided between the outer surface of the housing 2 and the end of the tension spring bolt 301. The O-ring 303 is sleeved on the tension spring bolt 301 and is located at the connection between the tension spring bolt 301 and the housing 2, sealing the connection between the housing 2 and the tension spring bolt 301 to prevent external foreign matter from entering the housing 2. The return tension spring 302 is located at one end of the end of the tension spring bolt 301 and is provided with a hook. The hook cooperates with the tension spring groove 406 on the brake pressure disc 4. When the brake pressure disc 4 rotates, the return tension spring 302 is pulled to stretch.

[0032] like Figure 3 、 Figure 7 、 Figure 8 、 Figure 9 As shown, the brake pressure disc 4 is an annular structure having one branch 1 401 and three branch 2s 405. The end of branch 1 401 is provided with a dial head slot 402 connected to the dial head 107. Branch 1 401 is used to position the brake pressure disc 4 within the housing 2. The brake pressure disc 4 is also provided with three branch 2s, which are used to cooperate with the reset assembly 3. Branch 2 is provided with a tension spring slot 406. One end of the return tension spring 302 is installed in the tension spring slot 406. The tension spring slot 406 limits the return tension spring 302 when the brake pressure disc 4 rotates. The three branch 2s 405 are evenly spaced circumferentially on the outer wall of the brake disc and aligned with the lower surface. Branch 1 401 is aligned with both the upper and lower surfaces of the brake ring.

[0033] Several vortex balls 403 are provided on the brake pressure disc 4. The vortex balls 403 include a vortex hole and an extension platform located on the side of the vortex hole. The extension platform is higher than the vortex hole. The extension platform is a curved surface structure that gradually rises on one side of the vortex hole. The steel ball 404 is moved to the extension platform to push the brake pressure disc 4 downward, and the lower wet clutch 5 is wrapped and engaged to achieve a braking effect.

[0034] The size of vortex one 202 partially matches that of steel ball 404. After the brake pressure disc 4 is installed in the housing 2, vortex one 202 and vortex two 403 are aligned one by one. When the brake pressure disc 4 rotates, the steel ball 404 cannot move in vortex one 202, so that the steel ball 404 breaks away from the vortex hole of vortex two 403 and reaches the extension platform, driving the brake pressure disc 4 to move downward, pushing the wet clutch pack 5 to engage, and achieving the braking effect.

[0035] The wet brake structure provided in this embodiment is an external structure, and the transmission shaft passes through the housing 2, the brake pressure plate, the wet clutch pack and the end cover 6 in sequence, which has a good heat dissipation effect. The components are all detachably connected, the subsequent maintenance cost is low, and the structure is compact. The dial head 107 on the rocker arm 101 assembly is connected to the connecting rod 102 by a spline to achieve stable transmission. The brake pressure plate 4 is reset by setting a return spring 302 to reduce the thickness of the brake structure.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wet brake structure, characterized in that: The invention comprises a rocker arm assembly for driving the brake pressure disc to rotate and a reset assembly for driving the brake pressure disc to reset after the rotation. The reset assembly and the rocker arm assembly are detachably mounted on the housing and extend into the housing to act on the brake pressure disc in the housing. The brake pressure disc and the wet clutch pack are arranged inside the housing, and the brake pressure disc is located on the surface of the wet clutch. The housing is installed outside the gearbox, and the transmission shaft of the gearbox is arranged through the housing and is installed in conjunction with the wet clutch pack inside the housing. The brake pressure disc and the interior of the outer shell are both provided with a vortex, and a steel ball is provided on the vortex. The rotation of the brake pressure disc is converted into radial movement of the brake pressure disc through the vortex and the steel ball, thereby pushing the structures in the wet clutch package to combine with each other and realize the braking effect.

2. The wet brake structure according to claim 1, characterized in that: The rocker arm assembly includes a rocker arm, a connecting rod and a shift head, the shift head is installed in the middle of the connecting rod, the rocker arm is arranged at one end of the connecting rod, the connecting rod is installed in the rocker arm hole of the housing, and the connecting rod is also provided with radial oil seal 1, radial oil seal 2, bearing 1, bearing 2 and a gasket. The radial oil seal 1 is located between the bearing 1 and the rocker arm, and the radial oil seal 2 is located between the bearing 2 and the gasket.

3. The wet brake structure according to claim 2, characterized in that: The connecting rod is spline-connected to the shift head.

4. The wet brake structure according to claim 1, characterized in that: The outer shell includes a shell and an end cover, and the shell and the end cover are connected by fixing bolts. A spherical vortex is provided at the bottom of the shell, and the spherical vortex cooperates with the steel ball part. Several spherical vortices are arranged in a ring-shaped uniform interval. A tension spring bolt hole is also provided on the outer periphery of the spherical vortex, and several tension spring bolt holes are arranged in a ring-shaped uniform interval. The tension spring bolt hole is used to install the reset assembly. An axial hole is provided on the shell, and the transmission shaft is connected to the wet clutch pack through the axial hole.

5. The wet brake structure according to claim 4, characterized in that: The housing end cover is mounted in cooperation with the housing through fixing bolts. The end cover is provided with an axial hole for passing the transmission shaft, and the end cover is also provided with a mounting groove for mounting an O-ring 2.

6. The wet brake structure according to claim 1, characterized in that: The reset assembly includes a tension spring bolt, a return tension spring and an O-ring. One end of the return tension spring has a hook, and the hook is arranged on the brake pressure disc. A gasket is provided between the tension spring bolt and the outer surface of the shell. The O-ring is located between the inner surface of the shell and the return tension spring.

7. The wet brake structure according to claim 1, characterized in that: The brake pressure disc is an annular structure, and branch one and branch two are provided on the outer periphery of the annular structure. Branch one is provided with a dial head groove that cooperates with the rocker arm assembly. Several branches two are evenly spaced and arranged on the outer wall of the brake pressure disc. Branch two is provided with a tension spring groove for cooperating with the reset assembly.

8. The wet brake structure according to claim 1, characterized in that: A second spherical vortex is provided on the brake pressure disc, and several of the second spherical vortices are arranged in a ring-shaped and evenly spaced manner on the surface of the brake pressure disc. The second spherical vortex includes a vortex hole that cooperates with the steel ball part and an extension platform on the side of the vortex hole. The extension platform is higher than the height of the vortex hole, and the extension platform is a curved surface structure that gradually rises on one side of the vortex hole.

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