Combined brake for mining truck and braking method thereof

Abstract

The present invention discloses a combined brake for a mining truck and a braking method thereof, belonging to the technical field of brakes for mining trucks, comprising a wet brake housing and a brake hydraulic cylinder, wherein the inner cavity of the wet brake housing is provided with a friction brake mechanism, a brake adjustment mechanism and a friction pair detection mechanism adapted to the brake hydraulic cylinder, which are respectively used for braking the mining truck motion pair, adjusting the friction brake mechanism and detecting the motion position of the friction pair of the friction brake mechanism when not braking. The present invention can limit the relative position of the friction pair when the mining truck is running normally by coordinating the friction brake mechanism with the brake adjustment mechanism, so that the friction areas of two adjacent friction pairs are not at the same height, so that when the mining truck is running on a bumpy road, the friction brake pad squeezes the limiting sleeve, so that the friction surface of the brake base plate and the brake steel plate will not contact, thereby achieving the effect of protecting the friction pair of the mining truck and extending the service life of the friction pair of the mining truck.

Description

Technical Field

[0001] The invention relates to the technical field of brakes for mining trucks, and in particular to a combined brake for mining trucks and a braking method thereof. Background Art

[0002] Mining trucks refer to heavy-duty dump trucks used in open-pit mines to complete delayed earth stripping and ore transportation tasks. Mining trucks used for transportation inside mines often use wet brakes as their braking mechanism in order to improve their safety performance.

[0003] When the mining truck needs to brake, the oil pressure in the hydraulic control system is adjusted by the brake, so that the oil cylinder controls the piston ring to release the pressure on the spring, and the friction pair, i.e. the copper substrate and the steel sheet, is squeezed by the spring in the wet brake assembly, so that the copper substrate and the steel sheet fit tightly together, and the central shaft sleeved in the outer gear sleeve is braked to achieve the braking function.

[0004] The current wet brake composition uses a fully sealed form to control the braking part, and the friction braking surface heights of the copper substrate and the steel plate are always kept consistent. During normal driving, due to the bumpy mine road surface, the copper substrate and the steel plate may come into contact, causing the friction surfaces of the two to rub against each other, accelerating the wear rate of the braking surface of the braking part, causing the copper substrate and the steel plate to offset and reduce the braking ability. When braking a mining truck traveling inside a mine, there is a risk of brake failure, which can easily cause safety accidents. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the wet brake composition in the prior art adopts a fully sealed form to control the braking part, the friction braking surface heights of the copper substrate and the steel sheet are always kept consistent, and during normal driving, due to the bumpy mine road surface, the copper substrate and the steel sheet may come into contact, causing the friction surfaces of the two to rub against each other, accelerating the wear rate of the braking surface of the braking part, resulting in the offset of the copper substrate and the steel sheet and a decrease in braking ability, and a combined brake for a mine truck and a braking method thereof are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A combined brake for a mining truck and a braking method thereof, comprising a wet brake housing and a brake hydraulic cylinder arranged in the inner cavity of the wet brake housing, wherein the inner cavity of the wet brake housing is provided with a friction brake mechanism adapted to the brake hydraulic cylinder for braking the kinematic pair of the mining truck, and the friction brake mechanism is provided with a brake adjustment mechanism for adjusting the friction brake mechanism;

[0008] The friction brake mechanism comprises a rotating shaft outer gear sleeve arranged in the inner cavity of the wet brake housing, the outer surface of the rotating shaft outer gear sleeve is alternately mounted with brake base plates and brake steel plates, the outer side of the brake steel plate is slidably connected with a brake inner gear ring through teeth, and a friction brake plate is arranged between the brake base plate and the brake steel plate;

[0009] The brake adjustment mechanism includes an adjustment column penetrating the inner wall of the brake steel plate, and a limit sleeve in contact with the inner edge of the brake steel plate is installed on the outer surface of the adjustment column at intervals. Adjustment inclined surfaces are provided at both ends of the limit sleeve, and an adjustment limit groove is provided on the side of the brake base plate close to the limit sleeve. The brake base plate is slidably connected to the friction brake plate through the adjustment limit groove.

[0010] Preferably, a substrate limiting ring adapted to the brake substrate is provided on the outer surface of the outer gear sleeve of the rotating shaft, and a synchronization socket is provided on the inner wall of the substrate limiting ring.

[0011] Preferably, the brake base plate rotates synchronously with the outer gear sleeve of the rotating shaft, the brake steel plate is stationary in the wet brake housing through the brake inner gear ring, and the surface of the brake steel plate is provided with a frosted surface adapted to the friction brake plate.

[0012] Preferably, one end of the adjustment column is plugged into the synchronization socket, and a limiting groove adapted to the thickness of the brake steel plate is provided on the outer side of the limiting sleeve, and the inner side thereof is slidably connected to the adjustment column.

[0013] Preferably, an adjustment hole slidably connected to the adjustment column is provided on the inner wall of the friction brake pad, and a braking friction surface is provided on a side of the friction brake pad close to the adjustment column.

[0014] Preferably, a friction pair detection mechanism is also provided in the wet brake housing, which is used to detect the moving position of the friction pair of the friction brake mechanism when not braking. The friction pair detection mechanism includes a detection column that slides within the adjustment column, and a positioning magnet is provided on the outer surface of the detection column. A steel ring is provided on the side of the limit sleeve close to the adjustment column, and a detection head is provided at one end of the detection column. A piston ring is provided at the output end of the brake hydraulic cylinder, and a brake spring is provided on the side of the piston ring away from the friction brake mechanism, and a pressure sensor adapted to the detection head is provided on the inner wall of the piston ring.

[0015] Preferably, a compression spring installed in the inner cavity of the adjustment column is fixed to the other end of the detection column, and the detection head is contact-connected with the pressure sensor.

[0016] A braking method for a combined brake for a mining truck includes the following braking steps:

[0017] S1: Brake hydraulic drive, step on the mining truck foot brake, open the brake hydraulic cylinder oil outlet, squeeze out the high-pressure oil, and cancel the piston ring's squeezing of the brake spring;

[0018] S2: The friction pairs squeeze each other, and the piston ring, supported by the brake spring, drives the brake base plate and the brake steel plate to move towards each other;

[0019] S3: Braking adjustment work, when the limit sleeve contacts the brake base plate, it drives the friction brake pad to move in the direction of approaching each other, so that the brake friction surface contacts the frosted surface, the brake base plate slows down the rotation, and the central shaft enters a continuous braking state.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By setting a friction brake mechanism in conjunction with a brake adjustment mechanism, the relative position of the friction pair can be restricted when the mining truck is running normally, so that the friction areas of two adjacent friction pairs are not at the same height. Therefore, when the mining truck is running on a bumpy road, the friction brake pad squeezes the limit sleeve so that the friction surface of the brake base plate and the brake steel plate will not contact each other, thereby protecting the friction pair of the mining truck and extending the service life of the friction pair of the mining truck.

[0022] 2. By using the adjustment column equipped with a limit sleeve in conjunction with the friction brake pad, a complete brake ring can be formed by the gathered friction brake pad when the mining truck brakes, thereby improving the braking stability when the brake base pad and the brake steel pad are squeezed against each other, and preventing the brake steel pad and the friction brake pad from being relatively offset, resulting in brake failure.

[0023] 3. By combining the detection column equipped with the detection head with the piston ring equipped with the pressure sensor, when the mining truck changes from the normal driving state to the braking state, the brake spring can squeeze the piston ring, so that the pressure sensor touches the detection head, and the squeezing force transmitted to the pressure sensor is detected. When the squeezing force is less than the standard value, it indicates that the internal friction brake mechanism is not operating in the braking area at this time, and a maintenance signal is issued to remind the driver to check the friction brake mechanism in time and solve the safety hazards. Therefore, the friction brake mechanism is checked before each braking, which improves the safety performance when the brake is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the internal structure of a wet brake and a brake hydraulic cylinder in a combined brake for a mining truck proposed by the present invention;

[0025] Figure 2 This is an exploded schematic diagram of the overall structure of a combined brake for a mining truck proposed by the present invention;

[0026] Figure 3 This is a schematic diagram of the structural decomposition of a brake base plate, a brake steel plate and an adjustment column in a combined brake for a mining truck proposed by the present invention;

[0027] Figure 4 This is a schematic diagram of the alternating installation of a brake base plate and a brake steel plate in a combined brake for a mining truck proposed by the present invention;

[0028] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at center A;

[0029] Figure 6 This is a schematic cross-sectional view of the internal structure of a piston ring and an adjustment column in a combined brake for a mining truck proposed by the present invention;

[0030] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0031] Figure 8 The present invention is a flowchart of a braking method for a combined brake for a mining truck.

[0032] Figure numerals: 1. wet brake housing; 2. brake hydraulic cylinder; 201. piston ring; 3. outer gear sleeve of rotating shaft; 301. substrate limit ring; 4. brake substrate; 5. brake steel plate; 6. brake inner gear ring; 7. friction brake pad; 701. adjustment hole; 8. adjustment column; 801. limit sleeve; 9. detection column; 901. positioning magnet; 902. detection head; 903. compression spring; 10. brake spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example, see Figures 1 to 7 A combined brake for a mining truck comprises a wet brake housing 1 and a brake hydraulic cylinder 2 arranged in the inner cavity of the wet brake housing 1, the inner cavity of the wet brake housing 1 is provided with a friction brake mechanism adapted to the brake hydraulic cylinder 2, and used for braking the kinematic pair of the mining truck, and a brake adjustment mechanism is provided on the friction brake mechanism, and used for adjusting the friction brake mechanism;

[0037] It should be noted that the brake substrate 4 is made of a copper substrate or other metal that cannot be attracted by magnetic force. The uniform segmentation process between the brake substrate 4 and the brake steel plate 5 is through the corrugated gap between the frosted surfaces of the two. When the brake is not applied, the brake hydraulic cylinder 2 drives the piston ring 201 to squeeze the brake spring 10, so that there is no squeezing force between the brake substrate 4 and the brake steel plate 5, thereby cooperating with the cooling oil with uniform internal oil pressure to enable the friction pair to be evenly expanded. This is the existing uniform expansion technology of the friction pair in the wet brake, which will not be repeated in the following.

[0038] Embodiment 1

[0039] like Figure 3 and Figure 4 As shown, the friction brake mechanism includes a rotating shaft outer gear sleeve 3 arranged in the inner cavity of a wet brake housing 1, a brake base plate 4 and a brake steel plate 5 are alternately installed on the outer surface of the rotating shaft outer gear sleeve 3, a brake inner gear ring 6 is slidably connected to the outer side of the brake steel plate 5 through teeth, and a friction brake plate 7 is arranged between the brake base plate 4 and the brake steel plate 5;

[0040] Furthermore, the brake base plate 4 rotates synchronously with the rotating shaft outer gear sleeve 3, and the brake steel plate 5 is stationary in the wet brake housing 1 through the brake inner gear ring 6. The surface of the brake steel plate 5 is provided with a frosted surface adapted to the friction brake plate 7;

[0041] It should be noted that: when the mining truck is running normally, the brake steel plate 5 maintains relative movement with the brake base plate 4 due to the restriction of the brake inner gear ring 6. When the mining truck brakes, the brake base plate 4 and the brake steel plate 5 are squeezed by the brake spring 10 so that the two can move towards each other, and the friction force of the friction surface is increased by the mutual squeezing between the two, so that the brake steel plate 5 brakes the brake base plate 4, and the central shaft sleeved in the outer gear sleeve 3 of the shaft enters the braking state, completing the driving process of the friction pair of the friction brake mechanism of the mining truck.

[0042] Furthermore, the outer surface of the rotating shaft outer gear sleeve 3 is provided with a substrate limiting ring 301 adapted to the brake substrate 4, and the inner wall of the substrate limiting ring 301 is provided with a synchronization jack;

[0043] It should be noted that the substrate limiting ring 301 can be provided to limit the brake substrate 4 at the edge and provide positioning installation for the adjustment column 8 .

[0044] Embodiment 2 proposed based on Embodiment 1

[0045] like Figures 1 to 5 As shown, the brake adjustment mechanism includes an adjustment column 8 penetrating the inner wall of the brake steel plate 5, and the outer surface of the adjustment column 8 is installed with a limit sleeve 801 in contact with the inner edge of the brake steel plate 5 at intervals, and both ends of the limit sleeve 801 are provided with an adjustment inclined surface, and the side of the brake base plate 4 close to the limit sleeve 801 is provided with an adjustment limit groove, and the brake base plate 4 is slidably connected with the friction brake plate 7 through the adjustment limit groove;

[0046] Furthermore, an adjustment hole 701 slidably connected to the adjustment column 8 is provided on the inner wall of the friction brake pad 7, and a braking friction surface is provided on one side of the friction brake pad 7 close to the adjustment column 8;

[0047] It should be noted that: when the mining truck is running normally, the friction brake pad 7 follows the brake base plate 4 and rotates synchronously with the outer gear sleeve 3 of the rotating shaft, so that the friction brake pad 7 slides outward along the surface of the brake base plate 4 under the action of inertia until it is located at the outermost edge of the adjustment limit groove. At this time, the position of the friction brake pad 7 corresponds to the non-friction braking area of ​​the brake steel plate 5. When the mining truck brakes, the friction brake pad 7 is squeezed by the adjustment inclined surface of the limit sleeve 801 so that the friction brake pad 7 moves in a direction of approaching each other, so that the position of the friction brake pad 7 corresponds to the friction braking area of ​​the brake steel plate 5, so that the brake base plate 4 and the brake steel plate 5 can be squeezed. When the mining truck is running normally, the centrifugal force of the friction brake pad 7 squeezes the upper limit sleeve 801 on the adjacent brake steel plate 5, so that the friction surfaces of the two will not contact each other during normal driving, thereby achieving the effect of protecting the friction brake pad 7 and the friction area of ​​the brake steel plate 5, and extending the service life of both.

[0048] Based on the above, after the mining truck stops, the friction brake pad 7 is in contact with the brake steel pad 5 and is in a braking state, and will not generate a squeezing force on the limit sleeve 801, causing the parking brake to fail;

[0049] A further advantage of adopting the above method is that after the friction brake pads 7 are gathered together, a complete brake ring will be formed, which can improve the braking stability between the brake base pad 4 and the brake steel pad 5 when the mining truck is braked, and will not cause relative displacement between the brake steel pad 5 and the friction brake pad 7, resulting in brake failure.

[0050] Furthermore, one end of the adjustment column 8 is plugged into the synchronization socket, and a limit groove matching the thickness of the brake steel plate 5 is provided on the outer side of the limit sleeve 801, and the inner side thereof is slidably connected with the adjustment column 8;

[0051] It should be noted that: during the driving of the mining truck, the limit sleeve 801 is sleeved on the outside of the adjusting column 8, rotates synchronously with the adjusting column 8, and contacts the friction brake pad 7, so that the extrusion pressure between the friction brake pad 7 and the limit sleeve 801 is in a minimum state, that is, at this time, the brake steel plate 5 and the friction brake pad 7 on the brake base plate 4 are in a uniformly spaced state, achieving the effect of self-adjustment of the interval.

[0052] Based on the above, if Figure 8 As shown, a braking method for a combined brake for a mining truck includes the following braking steps:

[0053] S1: Brake hydraulic drive, step on the mining truck foot brake, open the oil outlet of the brake hydraulic cylinder 2, squeeze out the high-pressure oil, and cancel the squeezing of the piston ring 201 on the brake spring 10;

[0054] S2: The friction pairs squeeze each other, and the piston ring 201, supported by the brake spring 10, drives the brake base plate 4 and the brake steel plate 5 to move toward each other;

[0055] S3: Braking adjustment work, when the limit sleeve 801 contacts the brake substrate 4, it drives the friction brake pad 7 to move in the direction of approaching each other, so that the brake friction surface contacts the frosted surface, the brake substrate 4 slows down the rotation, and the central shaft enters a continuous braking state.

[0056] Embodiment 3 proposed based on Embodiment 1 and Embodiment 2

[0057] like Figure 6 and Figure 7As shown, a friction pair detection mechanism is also provided in the wet brake housing 1, which is used to detect the moving position of the friction pair of the friction brake mechanism when not braking. The friction pair detection mechanism includes a detection column 9 that slides within the adjustment column 8, and a positioning magnet 901 is provided on the outer surface of the detection column 9. A steel ring is provided on the side of the limit sleeve 801 close to the adjustment column 8, and a detection head 902 is provided at one end of the detection column 9. A piston ring 201 is provided at the output end of the brake hydraulic cylinder 2, and a brake spring 10 is provided on the side of the piston ring 201 away from the friction brake mechanism, and a pressure sensor adapted to the detection head 902 is provided on the inner wall of the piston ring 201.

[0058] Furthermore, a compression spring 903 installed in the inner cavity of the adjustment column 8 is fixed to the other end of the detection column 9, and the detection head 902 is in contact connection with the pressure sensor;

[0059] It should be noted that: when the mining truck changes from the normal driving state to the braking state, the piston ring 201 is squeezed by the brake spring 10 to touch the detection head 902 on the detection column 9, and the squeezing force transmitted to the detection head 902 is detected by the pressure sensor in the piston ring 201. When the squeezing force is less than the standard value, it is determined that the internal friction brake mechanism is abnormal.

[0060] Based on the above, the detection standard of the non-braking movement position of the friction pair of the friction brake mechanism through the detection column 9 is specifically as follows: when the brake substrate 4 and the brake steel plate 5 in the friction brake mechanism are evenly distributed at normal intervals, the positioning magnet 901 corresponds to the inner steel ring of the limit sleeve 801, and the maximum force of the contact connection between the pressure sensor and the detection head 902 is the attraction of the steel ring to the positioning magnet 901 plus the elastic force of the compression spring 903. When the pressure detected at the initial contact between the pressure sensor and the detection head 902 is less than this force, it indicates that the internal friction brake mechanism is not operating in the designated area, thereby sending a maintenance signal to remind the driver to check the friction brake mechanism in time to solve the safety hazard;

[0061] A further benefit of adopting the above method is that when the brake steel sheet 5 is in a uniformly spaced position due to the squeezing force between the limit sleeve 801 and the friction brake sheet 7, the attraction of the positioning magnet 901 to the steel ring and the brake steel sheet 5 can provide further stabilizing force for the brake steel sheet 5, thereby restraining the brake steel sheet 5 during normal driving of the mining truck and keeping it in a normal position, thereby achieving the effect of maintaining the brake steel sheet 5 and the brake base plate 4 in a uniformly spaced state.

[0062] Working principle:

[0063] The present invention can drive the friction pair to operate normally and protect the friction area of ​​the friction pair through the friction brake mechanism and the brake adjustment mechanism when the mining truck is running normally and braking. The process of driving the friction pair to work when the mining truck is braking is specifically as follows: the friction brake pad 7 follows the brake base plate 4 and rotates synchronously with the outer gear sleeve 3 of the rotating shaft, so that the friction brake pad 7 slides outward along the surface of the brake base plate 4 under the action of inertia until it is located at the edge of the adjustment limit groove. At this time, the position of the friction brake pad 7 corresponds to the non-friction braking area of ​​the brake steel plate 5, and when the mining truck is running normally, the centrifugal force of the friction brake pad 7 squeezes the upper limit sleeve 801 on the adjacent brake steel plate 5, so that the friction surfaces of the two will not contact each other during normal driving, thereby achieving the effect of protecting the friction brake pad 7 and the friction area of ​​the brake steel plate 5 and extending the service life of the two.

[0064] Based on the above, the protection process of limiting the position of the friction pair when the mining truck is running normally is specifically as follows: the friction brake pad 7 is squeezed by the adjustment slope of the limit sleeve 801 so that the friction brake pad 7 moves in the direction of approaching each other, so that the position of the friction brake pad 7 corresponds to the friction braking area of ​​the brake steel pad 5, so that the brake base pad 4 and the brake steel pad 5 can be squeezed to play a braking role;

[0065] Based on the above, when the mining truck changes from the normal driving state to the braking state, the movement position of the friction pair is detected by the friction pair detection mechanism. The detection process is as follows: when the mining truck changes from the normal driving state to the braking state, the piston ring 201 is squeezed by the brake spring 10 to touch the detection head 902 on the detection column 9, and the squeezing force transmitted to the detection head 902 is detected by the pressure sensor in the piston ring 201. When the squeezing force is less than the standard value, it is determined that the internal friction brake mechanism is abnormal.

[0066] Based on the above, the detection standard of the non-braking moving position of the friction pair of the friction brake mechanism through the detection column 9 is specifically as follows: when the brake substrate 4 and the brake steel plate 5 in the friction brake mechanism are evenly distributed at normal intervals, the positioning magnet 901 corresponds to the inner steel ring of the limit sleeve 801. At this time, the maximum force of the contact connection between the pressure sensor and the detection head 902 is the attraction of the steel ring to the positioning magnet 901 plus the elastic force of the compression spring 903. When the pressure detected at the initial contact between the pressure sensor and the detection head 902 is less than this force, it indicates that the internal friction brake mechanism is not operating in the designated area, thereby sending a maintenance signal to remind the driver to check the friction brake mechanism in time to resolve safety hazards.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined brake for a mining truck, comprising a wet brake housing (1) and a brake hydraulic cylinder (2) arranged in an inner cavity of the wet brake housing (1), characterized in that: The inner cavity of the wet brake housing (1) is provided with a friction brake mechanism adapted to the brake hydraulic cylinder (2) for braking the mining truck kinematic pair, and the friction brake mechanism is provided with a brake adjustment mechanism for adjusting the friction brake mechanism; The friction brake mechanism comprises a rotating shaft outer gear sleeve (3) arranged in the inner cavity of a wet brake housing (1), a brake base plate (4) and a brake steel plate (5) being alternately mounted on the outer surface of the rotating shaft outer gear sleeve (3), a brake inner gear ring (6) being slidably connected to the outer side of the brake steel plate (5) via teeth, and a friction brake plate (7) being arranged between the brake base plate (4) and the brake steel plate (5); The brake adjustment mechanism comprises an adjustment column (8) penetrating the inner wall of the brake steel plate (5); a limit sleeve (801) contacting the inner edge of the brake steel plate (5) is installed at intervals on the outer surface of the adjustment column (8); both ends of the limit sleeve (801) are provided with adjustment inclined surfaces; a side of the brake base plate (4) close to the limit sleeve (801) is provided with an adjustment limit groove; and the brake base plate (4) is slidably connected to the friction brake plate (7) via the adjustment limit groove; An adjustment hole (701) slidably connected to the adjustment column (8) is provided on the inner wall of the friction brake pad (7), and a braking friction surface is provided on a side of the friction brake pad (7) close to the adjustment column (8).

2. A combined brake for a mining truck according to claim 1, characterized in that: The outer surface of the rotating shaft outer gear sleeve (3) is provided with a substrate limiting ring (301) adapted to the brake substrate (4), and the inner wall of the substrate limiting ring (301) is provided with a synchronization socket.

3. The combined brake for a mining truck according to claim 1, characterized in that: The brake base plate (4) rotates synchronously with the rotating shaft outer gear sleeve (3), the brake steel plate (5) is stationary in the wet brake housing (1) via the brake inner gear ring (6), and the surface of the brake steel plate (5) is provided with a frosted surface that matches the friction brake plate (7).

4. A combined brake for a mining truck according to claim 2, characterized in that: One end of the adjustment column (8) is plugged into the synchronization socket, and a limit groove matching the thickness of the brake steel plate (5) is provided on the outer side of the limit sleeve (801), and the inner side thereof is slidably connected to the adjustment column (8).

5. The combined brake for a mining truck according to claim 1, characterized in that: A friction pair detection mechanism is also provided in the wet brake housing (1) for detecting the moving position of the friction pair of the friction brake mechanism when not in braking state. The friction pair detection mechanism comprises a detection column (9) which is limitedly slidable inside the adjustment column (8), a positioning magnet (901) is provided on the outer surface of the detection column (9), a steel ring is provided on the side of the limit sleeve (801) close to the adjustment column (8), and a detection head (902) is provided at one end of the detection column (9), a piston ring (201) is provided at the output end of the brake hydraulic cylinder (2), a brake spring (10) is provided on the side of the piston ring (201) away from the friction brake mechanism, and a pressure sensor adapted to the detection head (902) is provided on the inner wall of the piston ring (201).

6. A combined brake for a mining truck according to claim 5, characterized in that: A compression spring (903) installed in the inner cavity of the adjustment column (8) is fixed to the other end of the detection column (9), and the detection head (902) is contact-connected with the pressure sensor.

7. A braking method for a combined brake for a mining truck according to any one of claims 5 to 6, characterized in that: The braking steps include: S1: Brake hydraulic drive, step on the mining truck foot brake, open the oil outlet of the brake hydraulic cylinder (2), squeeze out the high-pressure oil, and cancel the squeezing of the piston ring (201) on the brake spring (10); S2: The friction pair is pressed against each other, and the piston ring (201) is supported by the brake spring (10), driving the brake base plate (4) and the brake steel plate (5) to move towards each other; S3: Braking adjustment work, when the limit sleeve (801) contacts the brake base plate (4), it drives the friction brake plate (7) to move in a direction of approaching each other, so that the braking friction surface contacts the frosted surface, causing the brake base plate (4) to slow down its rotation, and the central shaft enters a continuous braking state.

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