Wet type brake supporting bridge and slag pot carrier

Abstract

The utility model provides a wet type brake supporting bridge and a slag pot carrier. The wet type brake supporting bridge comprises a first friction plate, a second friction plate, a hub, a piston, a fixing disc, a bearing, a shaft body and a lower longitudinal beam. The first friction plate comprises a first internal spline. When the first friction plate abuts against the second friction plate, the second friction plate generates friction force which hinders the first friction plate from moving. The hub comprises a first outer spline, the second friction plate is arranged on the first outer spline in a sleeving mode, and the first inner spline is in key connection with the first outer spline in a sliding mode. The piston comprises a concave part and is used for pushing the second friction plate to abut against the first friction plate. A containing cavity is defined by the fixing disc, the first friction plate, the second friction plate, the hub and the concave part, and cooling liquid is arranged in the containing cavity. The bearing, the hub, the piston and the fixing disc are arranged on the shaft body in a sleeved mode. And the lower longitudinal beam is connected with the shaft body. The brake system solves the problem that a transmission wheel of an existing brake system occupies too much space of a cooling liquid containing cavity.

Description

Technical Field

[0001] The present application relates to the technical field of metallurgical slag transportation equipment, and in particular to a wet brake support bridge and a tank truck. Background Art

[0002] Tank trucks are a type of special vehicle transportation equipment on metallurgical production lines. They are widely used in steel furnace refineries and nonferrous smelting plants to transfer and process smelting slag. At present, most of the rear axle brakes of tank trucks in use use drum brakes or caliper disc dry brakes, which have the problems of poor braking stability, exposed brakes and brake discs, easy corrosion and wear, and need to adjust or replace brake pads regularly, resulting in high maintenance costs. In addition, drum brakes or caliper disc dry brakes will accumulate a lot of heat during the braking process. Due to their poor heat dissipation performance, they can easily cause the brakes and wheel hubs to fail or deform prematurely under the influence of high temperature, causing brake performance failure, thereby affecting the stability of the tank truck during use.

[0003] In order to solve the above problems, Chinese patent CN212243315U discloses a driven brake system, including a closed housing, a receiving chamber formed between a wheel hub and a transmission shaft, and a coolant is filled in the receiving chamber. By accommodating the brake body in the closed housing and filling the receiving chamber with coolant, the brake body is in a closed environment immersed in oil, and the brake system forms an immersion brake, and the heat generated by the brake is taken away by the coolant, which has good heat dissipation performance.

[0004] However, the dynamic friction plate in the brake system is connected to the wheel hub through the transmission wheel, which occupies the space of the coolant storage chamber, reducing the capacity of the coolant, and easily causing the coolant to heat up too quickly and become ineffective. Therefore, the existing brake system has the problem that the transmission wheel occupies too much space in the coolant storage chamber. Utility Model Content

[0005] The purpose of the present application is to provide a wet brake support bridge with an increased accommodating cavity space, comprising a first friction plate, a second friction plate, a wheel hub, a piston, a fixed plate, a bearing, an axle body and a lower longitudinal beam. The first friction plate comprises a first internal spline. When the first friction plate abuts against the second friction plate, the second friction plate generates a friction force that hinders the movement of the first friction plate. The wheel hub comprises a first external spline, the second friction plate is sleeved on the first external spline, and the first internal spline is slidably connected to the first external spline key. The piston comprises a recessed portion, and the piston is used to push the second friction plate against the first friction plate.

[0006] The fixed plate, the first friction plate, the second friction plate, the wheel hub and the recessed portion enclose a receiving cavity, and a coolant is provided in the receiving cavity. The heat generated by the friction between the first friction plate and the second friction plate is transferred via the coolant. The bearing is embedded in the wheel hub. The bearing, the wheel hub, the piston and the fixed plate are sleeved on the shaft body, and the fixed plate is fixed to the shaft body. The lower longitudinal beam is connected to the shaft body.

[0007] Optionally, the second friction plate includes a first through hole, the piston includes a second through hole, the first through hole, the second through hole and the accommodating cavity are connected, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole.

[0008] Optionally, the first external spline is disposed through the first through hole, and a key height of the first internal spline is smaller than a distance from an inner wall of the first through hole to a top of the first external spline.

[0009] Optionally, the key top of the first internal spline and the key bottom of the first external spline are arranged spaced apart.

[0010] Optionally, the wet brake support bridge also includes a cover plate, a ring gear and a cylinder body, the cover plate, the ring gear, the cylinder body and the fixed plate are connected in sequence, the second friction plate is slidably connected to the ring gear key, the piston is slidably embedded in the cylinder body, and when the first friction plate presses against the second friction plate, the second friction plate presses against the cover plate.

[0011] Optionally, the ring gear includes a second internal spline, the second friction plate includes a second external spline, the second external spline is slidably connected to the second internal spline, and the end face of the second internal spline is flush with the end face of the first external spline.

[0012] Optionally, the wet brake support bridge also includes a first O-ring and a second O-ring, the first O-ring is clamped between the piston and the cylinder body, the second O-ring is clamped between the piston and the cylinder body, the inner diameter of the first O-ring is equal to the inner diameter of the second O-ring, and the outer diameter of the first O-ring is equal to the outer diameter of the second O-ring.

[0013] Optionally, the bearing is located on the inner side of the first external spline.

[0014] The present application also provides a tank-carrying vehicle, which is used to transport a slag pot, and includes the wet brake support bridge, a rear frame, a working mechanism, a locking plate, and a locking plate cylinder. The rear frame and the lower longitudinal beam are hinged. The working mechanism is hinged on the rear frame, and the slag pot is arranged on the working mechanism. The locking plate is hinged on the working mechanism, and the locking plate is used to lock the slag pot. The two ends of the locking plate cylinder are respectively connected to the working mechanism and the locking plate.

[0015] Optionally, the tank truck further includes a tilting cylinder, which is fixed to the rear frame and is hinged to the working mechanism.

[0016] The beneficial effects of the present application are as follows: by setting a first friction plate, a second friction plate, a wheel hub, a piston and a fixed plate. The first friction plate includes a first internal spline. When the first friction plate abuts against the second friction plate, the second friction plate generates a friction force that hinders the movement of the first friction plate. The wheel hub includes a first external spline, the second friction plate is sleeved on the first external spline, and the first internal spline is slidably connected to the first external spline key. The piston includes a recessed portion, and the piston is used to push the second friction plate against the first friction plate. The fixed plate and the first friction plate, the second friction plate, the wheel hub and the recessed portion enclose a receiving chamber, and a coolant is provided in the receiving chamber, and the heat generated by the friction between the first friction plate and the second friction plate is transferred via the coolant.

[0017] Since the first friction plate is directly connected to the first external spline on the wheel hub via the first internal spline, there is no need to arrange a transmission wheel between the first friction plate and the wheel hub, that is, there is no problem of the transmission wheel occupying part of the volume of the accommodating cavity, so that the volume of the accommodating cavity is larger, and more coolant can be accommodated, thereby preventing the coolant in the wet brake support bridge from heating up too quickly and failing.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the present application is described in detail below with reference to the preferred embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of a wet brake support bridge in one embodiment of the present application;

[0020] Figure 2 In one embodiment of the present application, Figure 1 A partial enlarged view of

[0021] Figure 3 is an exploded view of a wheel hub, a first friction plate, a second friction plate and a gear ring in one embodiment of the present application (the wheel hub is only partially shown, and only one piece of the first friction plate and the second friction plate is shown as an example);

[0022] Figure 4 In one embodiment of the present application, Figure 1 A partial enlarged view of B;

[0023] Figure 5 is a three-dimensional diagram of the application of a wet brake support bridge in one embodiment of the present application;

[0024] Figure 6 is an application top view of a wet brake support bridge in one embodiment of the present application;

[0025] Figure 7 It is a side view of a tank truck in one embodiment of the present application.

[0026] Wherein, the reference numerals are:

[0027] 10 Wet brake support bridge

[0028] 100 First friction plate

[0029] 1000 First internal spline

[0030] 101 Second friction plate

[0031] 1010 First through hole

[0032] 1011 Second external spline

[0033] 102 wheels

[0034] 1020 First external spline

[0035] 103 Piston

[0036] 1030 Depression

[0037] 1031 Second through hole

[0038] 104 Fixed plate

[0039] 105 Cover

[0040] 106 Ring gear

[0041] 1060 Second internal spline

[0042] 107 Cylinder

[0043] 108 First O-ring

[0044] 109 second O-ring

[0045] 110 Bearings

[0046] 111 Axis

[0047] 112 Lower longitudinal beam

[0048] 1120 Cylinder seat

[0049] 114 Steel Rims

[0050] 115 Tire

[0051] 116 Return spring

[0052] 20 Tank Car

[0053] 201 Tractor head

[0054] 202 Steering Mechanism

[0055] 203 rear frame

[0056] 204 Work Organization

[0057] 205 Lock Plate

[0058] 206 Locking plate cylinder

[0059] 207 Lifting Cylinder

[0060] 208 Tilt Cylinder

[0061] 30 Slag Pot

[0062] 301 Trunnion DETAILED DESCRIPTION

[0063] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0064] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. In order to enable those skilled in the art to better understand the present application scheme, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present application.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0066] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] Please also refer to Figures 1 to 3 In one embodiment, a wet brake support bridge 10 is provided, including a first friction plate 100, a second friction plate 101, a wheel hub 102, a piston 103, a fixed plate 104, a bearing 110, a shaft 111 and a lower longitudinal beam 112 (please refer to the lower longitudinal beam 112 Figure 5 ). The first friction plate 100 includes a first internal spline 1000. When the first friction plate 100 abuts against the second friction plate 101, the second friction plate 101 generates a friction force that hinders the movement of the first friction plate 100. The wheel hub 102 includes a first external spline 1020, the second friction plate 101 is sleeved on the first external spline 1020, and the first internal spline 1000 is slidably connected to the first external spline 1020.

[0068] Please also refer to Figures 1 to 3 , the piston 103 includes a recessed portion 1030, and the piston 103 is used to push the second friction plate 101 against the first friction plate 100. The fixed plate 104 and the first friction plate 100, the second friction plate 101, the wheel hub 102 and the recessed portion 1030 enclose a receiving chamber, and a coolant is provided in the receiving chamber. The heat generated by the friction between the first friction plate 100 and the second friction plate 101 is transferred via the coolant. The first friction plate 100 and the second friction plate 101 are immersed in the coolant, and the coolant can take away the heat generated by the friction between the first friction plate 100 and the second friction plate 101 to achieve wet braking. The bearing 110 is embedded in the wheel hub 102. The bearing 110, the wheel hub 102, the piston 103 and the fixed plate 104 are sleeved on the shaft body 111, and the fixed plate 104 is fixed to the shaft body 111. Lower longitudinal beam 112 (please refer to the lower longitudinal beam 112 Figure 5) is connected to the shaft body 111.

[0069] Please also refer to Figures 1 to 3 , define the central axis of the shaft body 111 as the X-axis. The first friction plate 100, the second friction plate 101, the first internal spline 1000, the first external spline 1020, the hub 102, the piston 103 and the fixed plate 104 can be arranged coaxially with the X-axis. The key on the first external spline 1020 and the key on the first internal spline 1000 are arranged one by one. The number of the first friction plate 100 and the number of the second friction plate 101 can be multiple, and the multiple first friction plates 100 and the multiple second friction plates 101 are arranged alternately. The first internal spline 1000 can slide relative to the first external spline 1020 in a direction parallel to the X-axis. The fixed plate 104 can be fixed to the shaft body 111 by an interference hole-shaft fit.

[0070] Please also refer to Figures 1 to 3 The first friction plate 100 can be made of a ceramic-based brake material or a powder metallurgy brake material. The second friction plate 101 can be made of steel. The first friction plate 100 can be a cylindrical sheet. The recessed portion 1030 can be cylindrical and face the fixed plate 104. The coolant can be 85W-90 gear oil or anti-wear hydraulic oil 46#.

[0071] Since the first friction plate 100 is directly key-connected to the first outer spline 1020 on the wheel hub 102 via the first inner spline 1000, there is no need to arrange a transmission wheel between the first friction plate 100 and the wheel hub 102, i.e., there is no problem of the transmission wheel occupying part of the volume of the accommodating cavity, so that the volume of the accommodating cavity is larger, and more coolant can be accommodated, thereby preventing the coolant in the wet brake support bridge 10 from heating up too quickly and failing.

[0072] Please also refer to Figure 2 and Figure 3 Optionally, the second friction plate 101 includes a first through hole 1010, the piston 103 includes a second through hole 1031, the first through hole 1010, the second through hole 1031 and the accommodating cavity are connected, and the inner diameter of the first through hole 1010 is smaller than the inner diameter of the second through hole 1031. The first through hole 1010 and the second through hole 1031 can be cylindrical holes and are coaxially arranged with the X axis. The second through hole 1031 can be connected with the recessed portion 1030 and coaxially arranged. The inner diameter of the first through hole 1010 is smaller than the inner diameter of the second through hole 1031, which can increase the contact area between the second friction plate 101 in contact with the piston 103 and the coolant, thereby accelerating the heat dissipation of the second friction plate 101.

[0073] Please also refer to Figure 2 and Figure 3Optionally, the first external spline 1020 is disposed in the first through hole 1010, and the key height h1 of the first internal spline 1000 is smaller than the distance h2 from the inner wall of the first through hole 1010 to the top of the first external spline 1020. With such a configuration, the distance h2 from the inner wall of the first through hole 1010 to the top of the first external spline 1020 can be made larger, so as to increase the contact area between the first friction plate 100 and the coolant, and make the heat dissipation of the first friction plate 100 faster.

[0074] Please also refer to Figure 2 and Figure 3 Optionally, the key top of the first internal spline 1000 and the key bottom of the first external spline 1020 are spaced apart. In this way, the coolant can flow through the gap between the key top of the first internal spline 1000 and the key bottom of the first external spline 1020 to the bottom of the first friction plate 100 and the bottom of the second friction plate 101 to cool the first friction plate 100 and the second friction plate 101.

[0075] Please also refer to Figures 1 to 3 Optionally, the wet brake support bridge 10 further includes a cover plate 105, a gear ring 106 and a cylinder body 107, the cover plate 105, the gear ring 106, the cylinder body 107 and the fixed plate 104 are connected in sequence, the second friction plate 101 is slidably connected to the gear ring 106, the piston 103 is slidably embedded in the cylinder body 107, and when the first friction plate 100 abuts against the second friction plate 101, the second friction plate 101 abuts against the cover plate 105. The cover plate 105, the gear ring 106, the cylinder body 107 and the fixed plate 104 can be connected by bolts.

[0076] Please also refer to Figures 1 to 3 The cover plate 105, the gear ring 106, the cylinder body 107 and the fixed plate 104 can be arranged coaxially with the X axis. The piston 103 can slide relative to the cylinder body 107 in a direction parallel to the X axis. The second friction plate 101 (for example Figure 2 The leftmost second friction plate 101 among the plurality of second friction plates 101 abuts against the cover plate 105 , which can prevent the first friction plate 100 from contacting the cover plate 105 and causing wear on the cover plate 105 .

[0077] Please also refer to Figures 1 to 3Optionally, the gear ring 106 includes a second internal spline 1060, and the second friction plate 101 includes a second external spline 1011, the second external spline 1011 is slidably connected to the second internal spline 1060, and the end face of the second internal spline 1060 is flush with the end face of the first external spline 1020. The key on the second internal spline 1060 and the key of the second external spline 1011 are arranged in a one-to-one correspondence. The end face of the second internal spline 1060 is flush with the end face of the first external spline 1020, which can prevent the first external spline 1020 from being too long to increase the processing time of the first external spline 1020 or prevent the first external spline 1020 from being too short to cause the hub 102 to occupy the accommodating cavity.

[0078] The second external spline 1011 can slide relative to the second internal spline 1060 in a direction parallel to the X-axis. The left end surface of the second internal spline 1060 can be flush with the left end surface of the first external spline 1020. The length of the second internal spline 1060 and the length of the first external spline 1020 can be substantially the same.

[0079] Please also refer to Figure 1 , Figure 2 and Figure 4 Optionally, the wet brake support bridge 10 further includes a first O-ring 108 and a second O-ring 109. The first O-ring 108 is sandwiched between the piston 103 and the cylinder 107, and the second O-ring 109 is sandwiched between the piston 103 and the cylinder 107. The inner diameter of the first O-ring 108 is equal to the inner diameter of the second O-ring 109. The outer diameter of the first O-ring 108 is equal to the outer diameter of the second O-ring 109. The material of the first O-ring 108 and the material of the second O-ring 109 can be nitrile rubber. The first O-ring 108 and the second O-ring 109 can be spaced apart and coaxially arranged with the X-axis. The inner and outer diameters of the first O-ring 108 and the inner and outer diameters of the second O-ring 109 are equal, that is, the first O-ring 108 and the second O-ring 109 can be O-rings of the same size, which reduces the types of O-rings and improves the interchangeability of O-rings.

[0080] Please also refer to Figures 1 to 3 Optionally, the bearing 110 is located on the inner side of the first external spline 1020. The bearing 110 may be a tapered roller bearing. The bearing 110 may be coaxially arranged with the X-axis. The bearing 110 is located on the inner side of the first external spline 1020, that is, the bearing 110 is embedded in the inner side of the section of the hub 102 where the first external spline 1020 is arranged to support the section where the first external spline 1020 is located, thereby increasing the radial load-bearing capacity of the first external spline 1020. The width of the bearing 110 may be smaller than the length of the first external spline 1020.

[0081] Please also refer to Figure 5 and Figure 6Optionally, the lower longitudinal beam 112 and the shaft body 111 can be connected by welding or screwing. The wheel hub 102 is provided with a steel ring 114, and the steel ring 114 is provided with a tire 115. Figure 6 As shown, two wheel hubs 102 may be disposed on the shaft body 111, the two wheel hubs 102 are disposed spaced apart from each other, and the end of the lower longitudinal beam 112 may be located between the two wheel hubs 102. Each wheel hub 102 is respectively provided with a corresponding steel rim 114 and a tire 115.

[0082] Please also refer to Figures 1 to 3 In the initial state, each first friction plate 100 and each second friction plate 101 are spaced apart, and no friction is generated between them. When the wheel hub 102 rotates around the X-axis, it can drive each first friction plate 100 to rotate around the X-axis. When the wheel hub 102 needs to brake, the piston 103 can push each second friction plate 101 in a direction parallel to the X-axis to abut against the corresponding first friction plate 100 in a direction parallel to the X-axis.

[0083] Since the second outer spline 1011 of the second friction plate 101 is clamped by the second inner spline 1060 of the ring gear 106, and the ring gear 106 is fixed to the shaft 111 by the fixed plate 104, the second friction plate 101 can only slide relative to the ring gear 106 in a direction parallel to the X-axis but cannot rotate around the X-axis. Therefore, when the second friction plate 101 and the first friction plate 100 come into contact, a friction force will be generated to hinder the movement of the first friction plate 100 (that is, the second friction plate 101 hinders the rotation of the first friction plate 100 around the X-axis), thereby achieving the purpose of slowing down the wheel hub 102.

[0084] Please also refer to Figures 1 to 3 A return spring 116 may be disposed outside the second inner spline 1060 of the gear ring 106, and the return spring 116 may abut against the piston 103. The return spring 116 may be disposed outside the piston 103. When the pressure oil pushing the piston 103 is unloaded, the return spring 116 may push the piston 103 back, thereby disengaging the first friction plate 100 and the second friction plate 101 from contact, eliminating the friction force, and releasing the brake of the wheel hub 102.

[0085] Please also refer to Figure 6 and Figure 7 In another embodiment, a tanker 20 is provided, including a tractor head 201, a steering mechanism 202, a rear frame 203, a working mechanism 204, a locking plate 205, a locking plate cylinder 206, a lifting cylinder 207 and the wet brake support bridge 10 of the above embodiment (the wet brake support bridge 10 is shown in FIG. Figure 1). The tractor head 201 is hinged to a steering mechanism 202 that can turn left and right, and the rear frame 203 is connected to the steering mechanism 202. The right end of the steering mechanism 202 can be hinged to the left end of the rear frame 203. The working mechanism 204 is hinged to the rear frame 203, and the slag pot 30 is arranged on the working mechanism 204. The rear frame 203 is hinged to the lower longitudinal beam 112. The lower end of the rear frame 203 can be hinged to the left end of the lower longitudinal beam 112.

[0086] Please also refer to Figure 6 and Figure 7 , the locking plate 205 is hinged on the working mechanism 204, and the locking plate 205 is used to lock the slag pot 30. The locking plate 205 can rotate relative to the working mechanism 204. The two ends of the locking plate cylinder 206 are respectively connected to the working mechanism 204 and the locking plate 205. The two ends of the locking plate cylinder 206 can be hinged to the working mechanism 204 and the locking plate 205 respectively. The lower end of the locking plate 205 can be hinged to the upper end of the working mechanism 204. The left end of the locking plate 205 can be hinged to the upper end of the locking plate cylinder 206. The locking plate 205 can be semicircular and include an arc-shaped recess to match the ear shaft 301 of the slag pot 30. When the locking plate cylinder 206 is extended, it can push the locking plate 205 to rotate to lock the ear shaft 301 of the slag pot 30, thereby locking the slag bag (locking the bag is locking the slag pot 30). When the locking plate oil cylinder 206 retracts, it can drive the locking plate 205 to reverse to release the lock on the ear shaft 301 .

[0087] Please also refer to Figure 6 and Figure 7 The lower longitudinal beam 112 includes a cylinder seat 1120 for mounting a lifting cylinder 207. One end of the lifting cylinder 207 is connected to the cylinder seat 1120, and the other end is mounted on the rear frame 203. The lifting cylinder 207 can be connected to the cylinder seat 1120 by screwing. The two ends of the lifting cylinder 207 can be hinged to the lower longitudinal beam 112 and the rear frame 203 respectively. When the lifting cylinder 207 is extended and retracted, the working mechanism 204 on the tank holding vehicle 20 can hold or release the slag pot 30.

[0088] Please also refer to Figure 6 and Figure 7 Optionally, the tanker 20 further includes a tilting cylinder 208, which is hinged to the rear frame 203 and hinged to the working mechanism 204. The tilting cylinder 208 can be tilted in the initial state. When the tilting cylinder 208 is extended, it can drive the working mechanism 204 hinged on the rear frame 203 to tilt, flip the slag pot 30 on the working mechanism 204, and pour out the slag in the slag pot 30.

[0089] The wet brake support bridge and tanker provided in the embodiments of the present application are introduced in detail above. For those skilled in the art, according to the concept of the embodiments of the present application, there will be some changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as a limitation on the present application. All equivalent modifications or changes made according to the spirit and technical ideas of the present application should still be covered by the claims of the present application.

Claims

1. A wet brake support bridge, characterized in that: include: a first friction plate including a first internal spline; a second friction plate, wherein when the first friction plate abuts against the second friction plate, the second friction plate generates a friction force that hinders the movement of the first friction plate; A wheel hub, comprising a first external spline, the second friction plate is sleeved on the first external spline, and the first internal spline is slidably connected to the first external spline; a piston, comprising a recessed portion, wherein the piston is used to push the second friction plate against the first friction plate; A fixed plate, which, together with the first friction plate, the second friction plate, the wheel hub and the recessed portion, forms an accommodating cavity, wherein a coolant is provided in the accommodating cavity, and heat generated by friction between the first friction plate and the second friction plate is transferred via the coolant; A bearing, which is embedded in the wheel hub; A shaft body, the bearing, the hub, the piston and the fixed disk are sleeved on the shaft body, and the fixed disk is fixed to the shaft body; as well as A lower longitudinal beam is connected to the axle body.

2. The wet brake support bridge according to claim 1, characterized in that: The second friction plate includes a first through hole, the piston includes a second through hole, the first through hole, the second through hole and the accommodating cavity are connected, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole.

3. The wet brake support bridge according to claim 2, characterized in that: The first external spline is disposed through the first through hole, and a key height of the first internal spline is smaller than a distance from an inner wall of the first through hole to a top of the first external spline.

4. The wet brake support bridge according to claim 3, characterized in that: The key top of the first internal spline and the key bottom of the first external spline are spaced apart.

5. The wet brake support bridge according to claim 1, characterized in that: It also includes a cover plate, a gear ring and a cylinder body, wherein the cover plate, the gear ring, the cylinder body and the fixed plate are connected in sequence, the second friction plate is slidably connected to the gear ring key, the piston is slidably embedded in the cylinder body, and when the first friction plate abuts against the second friction plate, the second friction plate abuts against the cover plate.

6. The wet brake support bridge according to claim 5, characterized in that: The gear ring includes a second internal spline, and the second friction plate includes a second external spline. The second external spline is slidably connected to the second internal spline, and an end surface of the second internal spline is flush with an end surface of the first external spline.

7. The wet brake support bridge according to claim 5, characterized in that: It also includes a first O-ring and a second O-ring, the first O-ring is clamped between the piston and the cylinder body, the second O-ring is clamped between the piston and the cylinder body, the inner diameter of the first O-ring is equal to the inner diameter of the second O-ring, and the outer diameter of the first O-ring is equal to the outer diameter of the second O-ring.

8. The wet brake support bridge according to claim 1, characterized in that: The bearing is located on the inner side of the first external spline.

9. A tanker truck, used for transporting slag tanks, characterized in that: include: A wet brake support bridge according to any one of claims 1 to 8; A rear frame, which is hinged to the lower longitudinal beam; A working mechanism, which is hinged on the rear frame, and the slag pot is arranged on the working mechanism; A locking plate, which is hinged on the working mechanism, and is used to lock the slag pot; and The locking plate oil cylinder has two ends connected to the working mechanism and the locking plate respectively.

10. The tanker truck according to claim 9, characterized in that: It also includes a tilting cylinder, which is fixed to the rear frame and is hinged to the working mechanism.

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