Mining cement mixing transport vehicle

Abstract

The utility model belongs to the technical field of cement transport vehicles, and discloses a mining cement mixing transport vehicle which comprises a frame and a double-brake guarantee mechanism, a front drive axle, a power source and a rear drive axle are sequentially installed on the frame from front to back, and normally-closed brakes are installed on the front drive axle and the rear drive axle respectively. Each normally-closed brake comprises a brake body, a brake cavity is formed in each brake body, a plurality of brake discs which are coaxially arranged in sequence are installed in each brake cavity, and a spring brake assembly used for pressing or loosening the brake discs is arranged on one side of each brake disc. Hydraulic oil ways are formed between the peripheral walls of the spring brake assemblies and the inner wall of the brake cavity and communicate with a hydraulic oil way on the frame; according to the utility model, the normally closed brake is adopted, and a double-brake guarantee structure is arranged, so that the safety performance of the vehicle in a flameout state or under the condition of sudden failure is guaranteed in all directions, and the stability and reliability of the brake function are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of cement transport vehicle technology, and in particular to a mining cement mixer transport vehicle. Background Technology

[0002] In underground operations, to prevent mine collapse, it is necessary to reinforce the tunnel walls by spraying or pouring concrete. The mining cement mixer truck is a high-efficiency concrete transportation equipment specially designed for the mining environment. It can directly transport ready-mixed concrete to the work face, reducing dust and noise pollution from on-site mixing.

[0003] Chinese invention patent application number 202110345996.X proposes a mining concrete mixer truck, which includes a frame, engine, power take-off transfer case, hydrostatic transmission mechanism, suspension mechanism, mixing tank and cab, solving the problems of traditional transport vehicles such as small load capacity, poor steering flexibility, poor comfort, excessive vehicle height and inconvenience in maintenance.

[0004] However, the transport vehicle in this patent has the following defects: First, the brakes used in the transport vehicle are mostly normally open structures, which require oil to achieve braking. However, in the long downhill environment of the mine, there may be situations such as slippage, which is relatively unsafe. Second, there are a lot of long downhill slopes in the mine. If the brakes are in a braking state for a long time, the friction pads may fail due to high temperature. Utility Model Content

[0005] The main technical problem to be solved by this utility model is to provide a mining cement mixer and transport vehicle that adopts a normally closed brake and is equipped with a dual braking protection structure, which comprehensively protects the vehicle's safety performance in the event of engine shutdown or sudden failure, as well as the stability and reliability of the braking function.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A mining cement mixer and transport vehicle includes a frame, with front transport wheels and rear transport wheels installed at both ends of the frame. A front drive axle, a power source, and a rear drive axle are installed on the frame from front to back. A normally closed brake is installed at the power input end of both the front drive axle and the rear drive axle.

[0008] All normally closed brakes include a brake body, which contains a brake chamber. Multiple brake discs are installed in the brake chamber in sequence and coaxially. A spring brake assembly for pressing or releasing the multiple brake discs is provided on one side of the brake discs. A hydraulic oil passage is formed between the outer peripheral wall of the spring brake assembly and the inner wall of the brake chamber. The hydraulic oil passage is connected to the hydraulic oil circuit on the vehicle frame.

[0009] It also includes a dual braking protection mechanism to ensure the braking performance of normally closed brakes.

[0010] The following are further optimizations of the above technical solution by this utility model:

[0011] The dual braking protection mechanism includes an auxiliary brake and a cooling circulation assembly. The auxiliary brake is installed between the power source and the rear drive axle, and the cooling circulation assembly is connected to the pressure oil circuit inside the normally closed brake.

[0012] Further optimization: The spring brake assembly includes a brake piston coaxially arranged with the brake disc. The brake piston is slidably installed in the brake chamber along the axial direction of the brake disc. A cavity is provided on the end face of the brake piston away from the brake disc. A brake spring is provided in the cavity. The two ends of the brake spring are respectively connected to the inner wall of the brake chamber and the brake piston. The brake spring is used to drive the brake piston to press the brake disc to achieve braking.

[0013] Further optimization: The cooling circulation assembly includes an oil inlet pipe and an oil return pipe. The oil inlet end of the oil inlet pipe is connected to a pressure oil tank for storing pressure oil, and the oil outlet end of the oil inlet pipe is connected to a flushing inlet on a normally closed brake. The flushing inlet is connected to the oil inlet end of the pressure oil circuit inside the normally closed brake. The oil inlet end of the oil return pipe is connected to a flushing outlet on a normally closed brake, and the flushing outlet is connected to the oil outlet end of the pressure oil circuit inside the normally closed brake. A heat exchanger is installed on the oil return pipe, and the oil outlet end of the oil return pipe is connected to the pressure oil tank.

[0014] Further optimization: Both power output ends of the power source are connected to power output shafts. One power output shaft is connected to the power input end of the normally closed brake on the front drive axle, and the other power output shaft is connected to the power input end of the auxiliary brake. The power output end of the auxiliary brake is connected to the power input end of the normally closed brake on the rear drive axle through a transmission shaft.

[0015] Further optimization: Both power output ends of the front drive axle are equipped with front transport wheels, and both power output ends of the rear drive axle are equipped with rear transport wheels.

[0016] Further optimization: The auxiliary brake adopts an electromagnetic eddy current retarder.

[0017] Further optimization: The vehicle frame includes a front end and a rear chassis. The rear end of the front end is hinged to the front end of the rear chassis. The front transport wheels, front drive axle, and power source are all mounted on the front end, while the rear transport wheels, rear drive axle, and auxiliary brakes are all mounted on the rear chassis.

[0018] Further optimization: A horizontally positioned cement mixing tank is installed on the rear chassis.

[0019] The present invention adopts the above technical solution and has the following beneficial effects:

[0020] 1. The transport vehicle in this utility model is equipped with a normally closed brake. When the transport vehicle is in a shutdown state or before a sudden failure, the engine in the power source stops running, and the hydraulic oil originally input to the normally closed brake flows back to the hydraulic oil tank. At this time, the spring brake assembly will quickly play its role and press all the brake discs tightly one by one.

[0021] This design enables reliable braking of the transport vehicle when it is stationary, effectively solving safety hazards such as vehicle slippage that may occur when the vehicle is turned off or experiences a sudden malfunction, and significantly improving the overall safety performance of the transport vehicle.

[0022] 2. By working together with the auxiliary brake and cooling circulation components, a double solid guarantee is built for the braking performance of the transport vehicle. The two complement each other and work together to ensure that the transport vehicle can achieve reliable braking during long-term operation, thereby ensuring the stability and reliability of the vehicle's braking performance from all dimensions.

[0023] Among them, the auxiliary brake can replace the normally closed brake to perform electronic braking tasks. In this way, the brake disc can get a valuable "rest" time during long-term use, effectively avoiding the potential risk of the transport vehicle's brake discs being worn out and failing due to prolonged use in a single instance.

[0024] Meanwhile, the proper configuration of the cooling circulation components can quickly remove the high temperature generated by the brake disc during use by using the continuously circulating pressurized oil. This measure successfully avoids the adverse situation of brake disc failure caused by high temperature accumulation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0027] Figure 2 This is a bottom perspective view of the vehicle frame structure in an embodiment of this utility model;

[0028] Figure 3 This is a top perspective view of the vehicle frame structure in an embodiment of this utility model;

[0029] Figure 4 This is a partial structural schematic diagram of the normally closed brake in an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram showing the connection between the cooling circulation assembly and the normally closed brake in an embodiment of this utility model.

[0031] In the diagram: 1. Chassis; 101. Front end; 102. Rear chassis; 103. Cement mixing tank; 2. Front transport wheel; 3. Rear transport wheel; 4. Front drive axle; 5. Power source; 6. Rear drive axle; 7. Normally closed brake; 701. Brake body; 702. Brake chamber; 703. Brake disc; 704. Hydraulic oil passage; 705. Brake piston; 706. Cavity; 707. Compression spring; 708. Compression block; 8. Auxiliary brake; 9. Cooling circulation assembly; 901. Oil inlet pipe; 902. Oil return pipe; 903. Pressure oil tank; 904. Flushing inlet; 905. Flushing outlet; 906. Heat exchanger; 10. Power take-off shaft; 11. Drive shaft. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1-5 As shown in the figure, a mining cement mixer truck includes a frame 1, with a front transport wheel 2 and a rear transport wheel 3 respectively installed at both ends of the frame 1. A front drive axle 4, a power source 5 and a rear drive axle 6 are installed on the frame 1 from front to back. A normally closed brake 7 is installed at the power input end of both the front drive axle 4 and the rear drive axle 6.

[0034] In this embodiment, the structure and working principle of the frame 1, the front drive axle 4, the power source 5, and the rear drive axle 6, as well as the installation structure and principle between them and the front transport wheel 2 and the rear transport wheel 3, are all existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0035] Each normally closed brake 7 includes a brake body 701, and a brake chamber 702 is provided inside the brake body 701. Multiple brake discs 703 are installed in the brake chamber 702 in sequence and coaxially arranged. A spring brake assembly for pressing or releasing the multiple brake discs 703 is provided on one side of the brake disc 703. A hydraulic oil passage 704 is formed between the outer peripheral wall of the spring brake assembly and the inner wall of the brake chamber 702. The hydraulic oil passage 704 is connected to the hydraulic oil circuit on the frame 1.

[0036] In this embodiment, the internal structure, installation relationship and working principle of the brake body 701 are all existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0037] like Figures 1-5 As shown in the figure, a mining cement mixer truck also includes a dual braking protection mechanism for ensuring the braking performance of the normally closed brake 7.

[0038] The dual braking protection mechanism includes an auxiliary brake 8 and a cooling circulation assembly 9. The auxiliary brake 8 is installed between the power source 5 and the rear drive axle 6, and the cooling circulation assembly 9 is connected to the pressure oil circuit inside the normally closed brake 7.

[0039] In this embodiment, the auxiliary brake 8 and the cooling circulation component 9 work together to provide a double solid guarantee for the braking performance of the transport vehicle. The two complement each other and work together to ensure that the transport vehicle can achieve reliable braking during long-term operation, thereby ensuring the stability and reliability of the braking performance of the transport vehicle from all dimensions.

[0040] In this embodiment, the auxiliary brake 8 can replace the normally closed brake 7 to perform electronic braking tasks. In this way, the brake disc 703 can get a valuable "rest" time during long-term use, effectively avoiding the potential risk that the brake disc 703 will fail due to excessive wear caused by the long-term use of the brake disc 703 in a single operation.

[0041] Meanwhile, the reasonable configuration of the cooling circulation component 9 can quickly remove the high temperature generated by the brake disc 703 during use by using the continuously circulating pressure oil. This measure successfully avoids the adverse situation of brake disc 703 failing due to high temperature accumulation.

[0042] The auxiliary brake 8 is an electromagnetic eddy current retarder.

[0043] In this embodiment, the electromagnetic eddy current retarder can be a commercially available model, such as the AX3 series retarder manufactured by Teloma Automotive Braking Systems (Shanghai) Co., Ltd.

[0044] In this embodiment, the connection structure and transmission principle between the electromagnetic eddy current retarder, the power source 5, and the normally closed brake 7 are all existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0045] like Figure 4 As shown, the spring brake assembly includes a brake piston 705 coaxially arranged with the brake disc 703. The brake piston 705 is slidably installed in the brake cavity 702 along the axial direction of the brake disc 703. A cavity 706 is provided on the end face of the brake piston 705 away from the brake disc 703. A brake spring 707 is provided in the cavity 706. The two ends of the brake spring 707 are respectively connected to the inner wall of the brake cavity 702 and the brake piston 705. The brake spring 707 is used to drive the brake piston 705 to press the brake disc 703 to achieve braking.

[0046] In this embodiment, the compression spring 707 is a high-strength disc spring.

[0047] In this invention, the spring braking assembly can be configured with the following structures:

[0048] The first structure: Several cavities 706 are provided on the end face of the brake piston 705 away from the brake disc 703. The cavities 706 are arranged in a ring with equal spacing around the axis of the brake piston 705. Each cavity 706 is equipped with a compression spring 707, and the two ends of the compression spring 707 are respectively connected to the inner wall of the brake cavity 702 and the inner wall of the cavity 706.

[0049] The second structure: A cavity 706 is provided on the end face of the brake piston 705 away from the brake disc 703. The cavity 706 is arranged in a ring and is coaxial with the brake piston 705. Several compression springs 707 are installed in the cavity 706 at equal intervals, and the two ends of the compression springs 707 are respectively connected to the inner wall of the brake cavity 702 and the inner wall of the cavity 706.

[0050] Based on the above structure, when the transport vehicle is in the off state, the brake piston 705, under the high-strength elastic force of the compression spring 707, presses its end against the brake disc 703, so that multiple brake discs 703 are tightly pressed together, thereby achieving braking of the transport vehicle.

[0051] Conversely, when the transport vehicle is in the starting state, hydraulic oil is introduced into the hydraulic oil passage 704 inside the brake body 701 through the hydraulic oil circuit. The hydraulic force of the hydraulic oil pushes the brake piston 705 to move away from the brake disc 703 and disengage from the brake disc 703, thereby releasing the brake on the transport vehicle.

[0052] The third structure: Based on the first or second structure, a clamping block 708 can be installed on one end of the brake piston 705 near the brake disc 703. In this case, the two ends of the clamping spring 707 are respectively connected to the inner wall of the brake chamber 702 and the clamping block 708. The end of the clamping block 708 near the brake disc 703 extends out of the brake piston 705 and presses against the end face of the brake disc 703.

[0053] Based on the third structure mentioned above, when the transport vehicle is in the off state, the end of the clamping block 708 is pressed against the brake disc 703 under the high-strength elastic force of the clamping spring 707, so that multiple brake discs 703 are tightly pressed together, thereby achieving braking of the transport vehicle.

[0054] Conversely, when the transport vehicle is in the starting state, hydraulic oil is introduced into the hydraulic oil passage 704 inside the brake body 701 through the hydraulic oil circuit. The hydraulic force of the hydraulic oil pushes the brake piston 705 to move away from the brake disc 703, and causes the end of the clamping block 708 to disengage from the brake disc 703, thereby releasing the brake on the transport vehicle.

[0055] Compared to traditional normally open brakes, the normally closed brakes used in this invention can only be released when the oil is in the system. This ensures that the transport vehicle is always in a braking state when it is turned off or in the event of a sudden malfunction, thus achieving reliable braking of the transport vehicle when it is parked. This design effectively solves the safety hazards such as vehicle slippage that may occur when the transport vehicle is turned off or in the event of a sudden malfunction, and greatly improves the overall safety performance of the transport vehicle.

[0056] like Figure 5 As shown, the cooling circulation assembly 9 includes an oil inlet pipe 901 and an oil return pipe 902. The oil inlet end of the oil inlet pipe 901 is connected to a pressure oil tank 903 for storing pressure oil. The oil outlet end of the oil inlet pipe 901 is connected to a flushing inlet 904 on a normally closed brake 7. The flushing inlet 904 is connected to the oil inlet end of the pressure oil circuit inside the normally closed brake 7. The oil inlet end of the oil return pipe 902 is connected to a flushing outlet 905 on a normally closed brake 7. The flushing outlet 905 is connected to the oil outlet end of the pressure oil circuit inside the normally closed brake 7. A heat exchanger 906 is installed on the oil return pipe 902, and the oil outlet end of the oil return pipe 902 is connected to the pressure oil tank 903.

[0057] In this embodiment, the heat exchanger 906 can be a plate heat exchanger that is commercially available.

[0058] In this embodiment, the pressure oil soaking the brake disc 703 in the normally closed brake 7 is circulated back through the flushing outlet 905 and the return oil line 902. When it flows through the heat exchanger 906, it completes the heat exchange with the coolant, thereby cooling down the pressure oil. Finally, it flows back to the pressure oil tank 903.

[0059] At the same time, the pressure oil in the pressure tank 903 is pressurized and enters the normally closed brake 7 through the oil inlet pipe 901 and the flushing inlet 904 under high pressure.

[0060] This invention cools the continuously circulating pressurized oil to quickly remove the high temperature of the brake disc 703, preventing the brake disc 703 from failing due to continuous high temperature, and further improving the reliability and stability of the vehicle's braking performance.

[0061] Both power output ends of the power source 5 are connected to power output shafts 10. One power output shaft 10 is connected to the power input end of the normally closed brake 7 on the front drive axle 4, and the other power output shaft 10 is connected to the power input end of the auxiliary brake 8. The power output end of the auxiliary brake 8 is connected to the power input end of the normally closed brake 7 on the rear drive axle 6 through a transmission shaft 11.

[0062] The front drive axle 4 is equipped with front transport wheels 2 at both power output ends, and the rear drive axle 6 is equipped with rear transport wheels 3 at both power output ends.

[0063] The vehicle frame 1 includes a front end 101 and a rear chassis 102. The rear end of the front end 101 is hinged to the front end of the rear chassis 102. The front transport wheel 2, the front drive axle 4 and the power source 5 are all mounted on the front end 101, and the rear transport wheel 3, the rear drive axle 6 and the auxiliary brake 8 are all mounted on the rear chassis 102.

[0064] A horizontally positioned cement mixing tank 103 is installed on the rear chassis 102.

[0065] In this embodiment, the installation structure and working principle of the cement mixing tank 103 are both existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0066] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement mixer truck for mining, comprising a frame (1), with front transport wheels (2) and rear transport wheels (3) respectively mounted at both ends of the frame (1), characterized in that, The frame (1) is equipped with a front drive axle (4), a power source (5) and a rear drive axle (6) in sequence from front to back. A normally closed brake (7) is installed at the power input end of both the front drive axle (4) and the rear drive axle (6). The normally closed brake (7) includes a brake body (701), a brake chamber (702) is provided in the brake body (701), a plurality of brake discs (703) are installed in the brake chamber (702) and arranged coaxially in sequence, a spring brake assembly for pressing or releasing the plurality of brake discs (703) is provided on one side of the brake disc (703), and a hydraulic oil passage (704) is formed between the outer peripheral wall of the spring brake assembly and the inner wall of the brake chamber (702), and the hydraulic oil passage (704) is connected to the hydraulic oil circuit on the frame (1); It also includes a dual braking protection mechanism to ensure the braking performance of the normally closed brake (7).

2. A mining cement mixer and transport vehicle according to claim 1, characterized in that, The dual braking protection mechanism includes an auxiliary brake (8) and a cooling circulation assembly (9). The auxiliary brake (8) is installed between the power source (5) and the rear drive axle (6), and the cooling circulation assembly (9) is connected to the pressure oil circuit inside the normally closed brake (7).

3. A mining cement mixer and transport vehicle according to claim 1, characterized in that, The spring brake assembly includes a brake piston (705) coaxially arranged with the brake disc (703). The brake piston (705) is slidably installed in the brake chamber (702) along the axial direction of the brake disc (703). A cavity (706) is provided on the end face of the brake piston (705) away from the brake disc (703). A brake spring (707) is provided in the cavity (706). The two ends of the brake spring (707) are respectively connected to the inner wall of the brake chamber (702) and the brake piston (705). The brake spring (707) is used to drive the brake piston (705) to press the brake disc (703) to achieve braking.

4. A mining cement mixer and transport vehicle according to claim 2, characterized in that, The cooling circulation assembly (9) includes an oil inlet pipe (901) and an oil return pipe (902). The oil inlet end of the oil inlet pipe (901) is connected to the pressure oil tank (903) for storing pressure oil. The oil outlet end of the oil inlet pipe (901) is connected to the flushing inlet (904) on the normally closed brake (7). The flushing inlet (904) is connected to the oil inlet end of the pressure oil circuit inside the normally closed brake (7). The oil inlet end of the oil return pipe (902) is connected to the flushing outlet (905) on the normally closed brake (7). The flushing outlet (905) is connected to the oil outlet end of the pressure oil circuit inside the normally closed brake (7). A heat exchanger (906) is installed on the oil return pipe (902). The oil outlet end of the oil return pipe (902) is connected to the pressure oil tank (903).

5. A mining cement mixer and transport vehicle according to claim 1, characterized in that, The two power output ends of the power source (5) are connected to power output shafts (10). One power output shaft (10) is connected to the power input end of the normally closed brake (7) on the front drive axle (4), and the other power output shaft (10) is connected to the power input end of the auxiliary brake (8). The power output end of the auxiliary brake (8) is connected to the power input end of the normally closed brake (7) on the rear drive axle (6) through a transmission shaft (11).

6. A mining cement mixer and transport vehicle according to claim 5, characterized in that, The front drive axle (4) is equipped with front transport wheels (2) at both power output ends, and the rear drive axle (6) is equipped with rear transport wheels (3) at both power output ends.

7. A mining cement mixer and transport vehicle according to claim 2, characterized in that, The auxiliary brake (8) is an electromagnetic eddy current retarder.

8. A mining cement mixer and transport vehicle according to claim 2, characterized in that, The vehicle frame (1) includes a front end (101) and a rear chassis (102). The rear end of the front end (101) is hinged to the front end of the rear chassis (102). The front transport wheel (2), the front drive axle (4) and the power source (5) are all mounted on the front end (101), and the rear transport wheel (3), the rear drive axle (6) and the auxiliary brake (8) are all mounted on the rear chassis (102).

9. A mining cement mixer and transport vehicle according to claim 8, characterized in that, A horizontally positioned cement mixing tank (103) is installed on the rear chassis (102).

Images