Double-motor driving system of crusher and crusher

Abstract

The utility model provides a double-motor driving system of a crusher and the crusher. The double-motor driving system comprises an oil tank, a first hydraulic pump, a first hydraulic motor, a second hydraulic motor and a reversing component, the first hydraulic motor and the second hydraulic motor are used for driving the crusher main shaft; the first hydraulic pump and the first hydraulic motor form a closed liquid loop; the first hydraulic pump is further connected with the reversing component, the reversing component is connected with the second hydraulic motor and the oil tank, and when the reversing component is located at the first reversing position, the first hydraulic pump only drives the first hydraulic motor; when the reversing component is located at the second reversing position, the first hydraulic pump drives the first hydraulic motor and the second hydraulic motor. The double-motor driving system is hydraulically driven, so that on-load starting, overload reverse rotation, pressure relief and constant power control can be realized while the requirements of the main shaft of the crusher on the rotating speed and the torque are met; the power device and the crusher are split and connected through a hydraulic pipeline, the size and weight of the crusher are reduced, and arrangement is more flexible.

Description

Technical Field

[0001] The utility model belongs to the technical field of crushing equipment, and in particular relates to a double-motor driving system of a crusher and a crusher. Background Art

[0002] In the field of alternative fuel crushing, comprehensive classification and recycling crushing, and domestic waste crushing, single-shaft fine crushers are often used. Compared with traditional crushers in these fields, single-shaft fine crushers require higher speeds. The speed of traditional crushers is generally not more than 40rpm, while the speed of single-shaft fine crushers is greater than 100rpm, and the torque requirement of single-shaft fine crushers is often greater than 30,000NM. At present, the conventional method of driving is to use a motor and a reducer. This driving method can meet the requirements of speed and torque under most working conditions, and when the load increases, the motor can instantly run at overpower, and the torque will reach 1.5 times the rated value, or even higher. However, the driving method of the motor and reducer has weak load-starting ability. When the crusher is blocked, the load-starting ability is weak, and it is often necessary to manually remove the material before starting the equipment. In addition, when the material is blocked, the friction clutch slips, causing heating and wear of the clutch, affecting its life. Using a hydraulic system to drive the crusher spindle can achieve load-starting and solve the problems existing in the motor drive. However, due to the uneven load during actual operation, usually the load is below the rated torque. But when encountering difficult-to-crush materials, the torque will rise instantly. At this time, a single hydraulic motor is not enough to provide the required torque. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a dual-motor drive system and a crusher for a crusher, which adopts hydraulic drive and can start with load, reverse overload, release pressure, and perform constant power control while meeting the requirements of the crusher main shaft on speed and torque; the power device and the crusher are separated and connected by a hydraulic pipeline, which reduces the volume and weight of the crusher and makes the layout more flexible.

[0004] In order to solve the above problems, one aspect of the utility model provides a dual-motor drive system for a crusher, comprising:

[0005] An oil tank, a first hydraulic pump, a first hydraulic motor, a second hydraulic motor and a reversing component; the first hydraulic motor and the second hydraulic motor are used to drive the main shaft of the crusher to operate; the first hydraulic pump is connected to the first hydraulic motor to form a closed liquid circuit; the first hydraulic pump is also connected to the reversing component, and the reversing component is connected to the second hydraulic motor and the oil tank respectively. When the reversing component is located at a first reversing position, the second hydraulic motor is connected to the oil tank to form a closed liquid circuit, and the first hydraulic pump only drives the first hydraulic motor; when the reversing component is located at a second reversing position, the second hydraulic motor is connected to the first hydraulic pump to form a closed liquid circuit, and the first hydraulic pump drives the first hydraulic motor and the second hydraulic motor at the same time.

[0006] Preferably, the reversing component includes a first reversing component and a second reversing component; the first reversing component includes a first interface, a second interface and a third interface; the second reversing component includes a fourth interface, a fifth interface and a sixth interface; the first oil port of the first hydraulic pump is connected to the first interface, the second interface is connected to the first oil port of the second hydraulic motor, and the third interface is connected to the oil tank; the second oil port of the first hydraulic pump is connected to the fourth interface, the fifth interface is connected to the second oil port of the second hydraulic motor, and the sixth interface is connected to the oil tank;

[0007] When the first reversing assembly is located at the first reversing position and the second reversing assembly is located at the first reversing position, the first interface is cut off, the second interface is connected to the third interface, the fourth interface is cut off, the fifth interface is connected to the sixth interface, and the first hydraulic pump only drives the first hydraulic motor;

[0008] When the first reversing component is in the second reversing position and the second reversing component is in the second reversing position, the first interface is connected to the second interface, the third interface is cut off, the fourth interface is connected to the fifth interface, the sixth interface is cut off, and the first hydraulic pump drives the first hydraulic motor and the second hydraulic motor at the same time.

[0009] Preferably, the first reversing assembly includes: a first two-position four-way reversing valve and a first cartridge valve; the first oil port of the first hydraulic pump is connected to the A chamber of the first cartridge valve, the A chamber of the first cartridge valve is connected to the P port of the first two-position four-way reversing valve, the A port of the first two-position four-way reversing valve is connected to the control chamber of the first cartridge valve, the B port of the first two-position four-way reversing valve is connected to the B chamber of the first cartridge valve, the B chamber of the first cartridge valve is connected to the first oil port of the second hydraulic motor, and the T port of the first two-position four-way reversing valve is connected to the oil tank.

[0010] Preferably, the second reversing assembly includes: a second two-position four-way reversing valve and a second cartridge valve; the second oil port of the first hydraulic pump is connected to the A chamber of the second cartridge valve, the A chamber of the second cartridge valve is connected to the P port of the second two-position four-way reversing valve, the A port of the second two-position four-way reversing valve is connected to the control chamber of the second cartridge valve, the B port of the second two-position four-way reversing valve is connected to the B chamber of the second cartridge valve, the B chamber of the second cartridge valve is connected to the second oil port of the second hydraulic motor, and the T port of the second two-position four-way reversing valve is connected to the oil tank.

[0011] Preferably, the first two-position four-way directional control valve and / or the second two-position four-way directional control valve is an electromagnetic directional control valve.

[0012] Preferably, the system further comprises a second hydraulic pump, wherein the second hydraulic pump is connected in parallel with the first hydraulic pump.

[0013] Preferably, the first hydraulic pump is a bidirectional hydraulic pump, and the first hydraulic motor and the second hydraulic motor are both bidirectional hydraulic motors.

[0014] Preferably, a torque sensor is further included; the torque sensor is used to detect the torque of the main shaft of the crusher.

[0015] Preferably, it also includes a controller; the controller is electrically connected to the torque sensor and the switching component respectively.

[0016] Another aspect of the utility model provides a crusher, comprising the dual-motor drive system of the crusher described above; the output shaft of the first hydraulic motor and the output shaft of the second hydraulic motor are connected to the main shaft of the crusher.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The dual-motor drive system of the crusher of the utility model adopts a hydraulic drive mode. Compared with the drive mode of the combination of a motor and a reducer, the hydraulic drive can start with load, reverse and relieve pressure when overload, and has constant power control while meeting the required speed and torque, thereby overcoming the disadvantage of the weak load-starting ability of the motor drive. In addition, except for the connection between the hydraulic motor and the crusher main shaft, the other components of the drive system are separated from the crusher, and the hydraulic motor and the hydraulic pump are connected by hydraulic pipelines, thereby reducing the volume and weight of the crusher and making the layout more flexible.

[0019] The dual-motor drive system of the crusher of the utility model adopts a single-motor-dual-motor switching scheme to drive the crusher main shaft. Under normal circumstances, when operating below the rated torque, the reversing component is located at the first reversing position. At this time, the flow of the first hydraulic pump is only allocated to the first hydraulic motor, and the first hydraulic motor drives the crusher main shaft alone, and the second hydraulic motor acts as a free wheel follower; when encountering difficult-to-crush materials, after the torque increases to a certain value, the reversing component is located at the second reversing position, and the flow of the first hydraulic pump is simultaneously allocated to the first hydraulic motor and the second hydraulic motor, that is, the dual motors output at the same time to drive the crusher main shaft, thereby meeting the crusher main shaft The requirements for speed and torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the dual-motor drive system of the crusher described in the embodiment of the utility model.

[0021] Among them: 1-first hydraulic motor; 11-first oil port of the first hydraulic motor; 12-second oil port of the first hydraulic motor; 2-second hydraulic motor; 21-first oil port of the second hydraulic motor; 22-second oil port of the second hydraulic motor; 3-first reversing assembly; 31-first two-position four-way reversing valve; 32-first cartridge valve; 33-first interface; 34-second interface; 35-third interface; 4-second reversing assembly; 41-second two-position four-way reversing valve; 42-second cartridge valve; 43-fourth interface; 44-fifth interface; 45-sixth interface; 5-first hydraulic pump; 51-first oil port of the first hydraulic pump; 52-second oil port of the first hydraulic pump; 6-oil tank; 7-second hydraulic pump. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0024] Example 1

[0025] like Figure 1 As shown, a dual-motor drive system of a crusher described in this embodiment includes:

[0026] The oil tank 6, the first hydraulic pump 5, the first hydraulic motor 1, the second hydraulic motor 2 and the reversing component; the first hydraulic motor 1 and the second hydraulic motor 2 are used to drive the main shaft of the crusher to operate; the first hydraulic pump 5 is connected to the first hydraulic motor 1 to form a closed liquid circuit; the first hydraulic pump 5 is also connected to the reversing component, and the reversing component is connected to the second hydraulic motor 2 and the oil tank respectively. When the reversing component is located at the first reversing position, the second hydraulic motor 2 is connected to the oil tank to form a closed liquid circuit, and the first hydraulic pump only drives the first hydraulic motor 1; when the reversing component is located at the second reversing position, the second hydraulic motor 2 is connected to the first hydraulic pump to form a closed liquid circuit, and the first hydraulic pump drives the first hydraulic motor 1 and the second hydraulic motor 2 at the same time.

[0027] The dual-motor drive system of the crusher of this embodiment adopts a hydraulic drive mode. Compared with the drive mode of the motor and the reducer, the hydraulic drive can start with load, reverse and relieve pressure when overload, and has constant power control while meeting the required speed and torque, thereby overcoming the disadvantage of the weak load-starting ability of the motor drive. In addition, except for the connection between the hydraulic motor and the crusher main shaft, the other components of the drive system are separated from the crusher, and the hydraulic motor and the hydraulic pump are connected by hydraulic pipelines, thereby reducing the volume and weight of the crusher and making the layout more flexible.

[0028] There are two key points in using a hydraulic system to drive the rotating shaft of the crusher, namely, the speed and torque need to meet the requirements of the crusher main shaft. In actual operation, the load is uneven. Normally, the load is below the rated torque, but when encountering difficult-to-crush materials, the torque will rise instantly. At this time, a single hydraulic motor is not enough to provide the required torque. Therefore, the dual-motor drive system of the crusher of the utility model adopts a single-motor-dual-motor switching scheme to drive the crusher main shaft. Normally, when operating below the rated torque, the reversing component is located in the first reversing position. At this time, the flow of the first hydraulic pump is only allocated to the first hydraulic motor, and the first hydraulic motor drives the crusher main shaft alone, and the second hydraulic motor acts as a freewheel follower; when encountering difficult-to-crush materials, after the torque increases to a certain value, the reversing components are all located in the second reversing position, and the flow of the first hydraulic pump is simultaneously allocated to the first hydraulic motor and the second hydraulic motor, that is, the dual motors simultaneously output to drive the crusher main shaft, thereby meeting the crusher main shaft's requirements for speed and torque.

[0029] In some embodiments, the specific structure of the reversing component has many optional structures, as long as the above-mentioned function of switching the direction of the oil circuit can be realized. In this embodiment, the reversing component is implemented by two sets of reversing components. The reversing component includes a first reversing component 3 and a second reversing component 4; the first oil port 51 of the first hydraulic pump is connected to the first oil port 11 of the first hydraulic motor 1, and the second oil port 52 of the first hydraulic pump is connected to the second oil port 12 of the first hydraulic motor 1; that is, the first hydraulic pump and the first hydraulic motor form a closed oil circuit, and the first hydraulic pump drives the first hydraulic motor to operate. The first reversing component 3 includes a first interface 33, a second interface 34 and a third interface 35; the second reversing component 4 includes a fourth interface 43, a fifth interface 44 and a sixth interface 45; the first oil port 51 of the first hydraulic pump 5 is also connected to the first interface 33 of the first reversing component 3, the second interface 34 of the first reversing component 3 is connected to the first oil port 21 of the second hydraulic motor 2, and the third interface 35 of the first reversing component 3 is connected to the oil tank 6; the second oil port 52 of the first hydraulic pump 5 is also connected to the fourth interface 43 of the second reversing component 4, the fifth interface 44 of the second reversing component 4 is connected to the second oil port 22 of the second hydraulic motor 2, and the sixth interface 45 of the second reversing component 4 is connected to the oil tank 6.

[0030] When the first reversing assembly 3 is located at the first reversing position and the second reversing assembly 4 is located at the first reversing position, the first interface of the first reversing assembly 3 is cut off, the second interface of the first reversing assembly 3 is connected to the third interface of the first reversing assembly 3, the fourth interface of the second reversing assembly 4 is cut off, and the fifth interface of the second reversing assembly 4 is connected to the sixth interface of the second reversing assembly 4. Taking the first oil port 51 of the first hydraulic pump as the oil outlet and the second oil port 52 as the oil return port as an example, at this time, the oil of the first hydraulic pump 5 is cut off from the first oil port 51 through the first interface 33 of the first reversing assembly 3, and the oil of the oil tank 6 is sent from the third interface 35 of the first reversing assembly 3 to the second interface 34, and sent to the first oil port 21 of the second hydraulic motor 2, and the oil of the oil tank 6 is sent from the third interface 35 of the second reversing assembly 4 to the second interface 34, and sent to the second oil port 22 of the second hydraulic motor 2, thereby, the first hydraulic pump 5 only drives the first hydraulic motor 1, and does not supply oil to the second hydraulic motor 2.

[0031] When the first reversing assembly 3 is located at the second reversing position and the second reversing assembly 4 is located at the second reversing position, the first interface 33 of the first reversing assembly 3 is connected to the second interface 34 of the first reversing assembly 3, the third interface 35 of the first reversing assembly 3 is cut off, the fourth interface 43 of the second reversing assembly 4 is connected to the fifth interface 44 of the second reversing assembly 4, and the sixth interface 45 of the second reversing assembly 4 is cut off. Taking the first oil port 51 of the first hydraulic pump as the oil outlet and the second oil port 52 as the oil return port as an example, at this time, the oil of the first hydraulic pump 5 is sent from the first oil port 51 through the first interface 33 of the first reversing assembly 3 to the second interface 34, and then to the first oil port 21 of the second hydraulic motor 2, and then from the second oil port 22 of the second hydraulic motor 2 to the second interface 34 and the first interface 33 of the second reversing assembly 4, and then back to the second oil port 52 of the first hydraulic pump 5, thereby, the first hydraulic pump drives the first hydraulic motor 1 and the second hydraulic motor 2 at the same time, and the first hydraulic motor 1 and the second hydraulic motor 2 drive the crusher main shaft at the same time.

[0032] In some embodiments, the specific structures of the first reversing assembly and the second reversing assembly are optional, as long as the above-mentioned function of switching the direction of the oil circuit can be realized. In this embodiment, the first reversing assembly 3 includes: a first two-position four-way reversing valve 31 and a first cartridge valve 32; the first oil port 51 of the first hydraulic pump 5 is connected to the A cavity of the first cartridge valve 32, the A cavity of the first cartridge valve 32 is connected to the P port of the first two-position four-way reversing valve 31, the A port of the first two-position four-way reversing valve 31 is connected to the control cavity of the first cartridge valve 32, the B port of the first two-position four-way reversing valve 31 is connected to the B cavity of the first cartridge valve 32, the B cavity of the first cartridge valve 32 is connected to the first oil port 21 of the second hydraulic motor 2, and the T port of the first two-position four-way reversing valve 31 is connected to the oil tank 6. The second reversing assembly 4 includes: a second two-position four-way reversing valve 41 and a second cartridge valve 42; the second oil port of the first hydraulic pump 5 is connected to the A chamber of the second cartridge valve 42, the A chamber of the second cartridge valve 42 is connected to the P port of the second two-position four-way reversing valve 41, the A port of the second two-position four-way reversing valve 41 is connected to the control chamber of the second cartridge valve 42, the B port of the second two-position four-way reversing valve 41 is connected to the B chamber of the second cartridge valve 42, the B chamber of the second cartridge valve 42 is connected to the second oil port 22 of the second hydraulic motor 2, and the T port of the second two-position four-way reversing valve 41 is connected to the oil tank 6.

[0033] When the first two-position four-way reversing valve 31 is in the first reversing position, that is, P and A are connected, and T and B are connected, the oil from the first hydraulic pump 5 drives the first hydraulic motor 1 to rotate, and the oil simultaneously enters the A port of the first cartridge valve 32 through the oil circuit from the first oil port 51 of the first hydraulic pump 5, and is cut off from the control chamber of the first cartridge valve 32 through the P port and the A port of the first two-position four-way reversing valve 31; the second oil port 52 of the first hydraulic pump 5 enters the A port of the second hydraulic cartridge valve 42 through the oil circuit, and is cut off from the P port and the A port of the second two-position four-way reversing valve 41 to the control chamber of the second cartridge valve 42, thereby not supplying oil to the second hydraulic motor. The oil in the oil tank is sent to the T port and the B port of the first two-position four-way reversing valve 31 and the B port of the first cartridge valve 32 through the oil circuit, and then to the first oil port 21 of the second hydraulic motor 2. The oil in the oil tank is sent to the T port and the B port of the second two-position four-way reversing valve 41 and the B port of the second cartridge valve 42 through the oil circuit, and then to the second oil port 22 of the second hydraulic motor 2. At this time, the first hydraulic motor 1 is in a high-speed operation state, outputting the minimum torque; the second hydraulic motor 2 is in a free wheel state, rotating with the main shaft.

[0034] Preferably, the first two-position four-way reversing valve 31 and the second two-position four-way reversing valve 41 are both electromagnetic reversing valves.

[0035] The first hydraulic pump may be a large displacement hydraulic pump, and in addition, a parallel hydraulic pump solution may also be used. Specifically, the dual-motor drive system of the crusher further includes a second hydraulic pump 7, which is connected in parallel with the first hydraulic pump 5.

[0036] In order to meet the forward and reverse bidirectional driving mode of the crusher main shaft, preferably, the first hydraulic pump 5 is a bidirectional hydraulic pump, and the first hydraulic motor 1 and the second hydraulic motor 2 are both bidirectional hydraulic motors. Therefore, the oil supply direction of the hydraulic pump can be switched according to the actual working needs of the crusher, and the running directions of the first hydraulic motor and the second hydraulic motor can be changed, thereby controlling the forward and reverse rotation of the crusher main shaft.

[0037] Preferably, the dual-motor drive system of the crusher also includes a torque sensor; the torque sensor is used to detect the torque of the main shaft of the crusher. According to the detected torque of the main shaft of the crusher, when the torque increases to a set value, the solenoid valve can be automatically or manually operated to change the drive system to dual-motor simultaneous drive; after the torque decreases, the solenoid valve can be automatically or manually operated to change the drive system to single-motor drive.

[0038] Preferably, the dual-motor drive system of the crusher further includes a controller; the controller is electrically connected to the torque sensor, the first two-position four-way reversing valve 31, and the second two-position four-way reversing valve 41. When the torque sensor detects that the torque increases to a set value, the controller controls the first two-position four-way reversing valve 31 and the second two-position four-way reversing valve 41 to switch positions, so that the flow of the hydraulic pump is automatically distributed to the second hydraulic motor, that is, the dual motors output at the same time to drive the main shaft; when the torque sensor detects that the torque is less than the set value, the controller controls the first two-position four-way reversing valve 31 and the second two-position four-way reversing valve 41 to switch positions, and restore to the single-motor driven working condition.

[0039] Example 2

[0040] The crusher of this embodiment includes a crusher main shaft and the dual-motor drive system of the crusher of Embodiment 1. The output shaft of the first hydraulic motor and the output shaft of the second hydraulic motor of the dual-motor drive system are connected to the crusher main shaft.

[0041] The crusher adopts the above-mentioned hydraulic dual-motor drive system. Compared with the motor acceleration and reduction drive mode, it can start with load, reverse and release pressure when overloaded, and has constant power control while meeting the required speed and torque, overcoming the shortcomings of the motor drive's weak load-starting ability. The power device of the drive system is separated from the crusher and connected through hydraulic pipelines to reduce the size and weight of the crusher and make the layout more flexible. The single motor drive and dual motor drive can be adjusted according to the torque of the crusher's main shaft during actual work to meet the crusher's main shaft's requirements for speed and torque.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A dual-motor drive system for a crusher, characterized in that: include: An oil tank, a first hydraulic pump, a first hydraulic motor, a second hydraulic motor and a reversing component; The first hydraulic motor and the second hydraulic motor are used to drive the main shaft of the crusher; the first hydraulic pump is connected to the first hydraulic motor to form a closed liquid circuit; the first hydraulic pump is also connected to the reversing component, and the reversing component is connected to the second hydraulic motor and the oil tank respectively. When the reversing component is located at a first reversing position, the second hydraulic motor is connected to the oil tank to form a closed liquid circuit, and the first hydraulic pump only drives the first hydraulic motor; when the reversing component is located at a second reversing position, the second hydraulic motor is connected to the first hydraulic pump to form a closed liquid circuit, and the first hydraulic pump drives the first hydraulic motor and the second hydraulic motor at the same time.

2. The dual-motor drive system of a crusher according to claim 1, characterized in that: The reversing component includes a first reversing component and a second reversing component; the first reversing component includes a first interface, a second interface and a third interface; the second reversing component includes a fourth interface, a fifth interface and a sixth interface; the first oil port of the first hydraulic pump is connected to the first interface, the second interface is connected to the first oil port of the second hydraulic motor, and the third interface is connected to the oil tank; the second oil port of the first hydraulic pump is connected to the fourth interface, the fifth interface is connected to the second oil port of the second hydraulic motor, and the sixth interface is connected to the oil tank; When the first reversing assembly is located at the first reversing position and the second reversing assembly is located at the first reversing position, the first interface is cut off, the second interface is connected to the third interface, the fourth interface is cut off, the fifth interface is connected to the sixth interface, and the first hydraulic pump only drives the first hydraulic motor; When the first reversing component is in the second reversing position and the second reversing component is in the second reversing position, the first interface is connected to the second interface, the third interface is cut off, the fourth interface is connected to the fifth interface, the sixth interface is cut off, and the first hydraulic pump drives the first hydraulic motor and the second hydraulic motor at the same time.

3. The dual-motor drive system of the crusher according to claim 2, characterized in that: The first reversing assembly includes: a first two-position four-way reversing valve and a first cartridge valve; the first oil port of the first hydraulic pump is connected to the A chamber of the first cartridge valve, the A chamber of the first cartridge valve is connected to the P port of the first two-position four-way reversing valve, the A port of the first two-position four-way reversing valve is connected to the control chamber of the first cartridge valve, the B port of the first two-position four-way reversing valve is connected to the B chamber of the first cartridge valve, the B chamber of the first cartridge valve is connected to the first oil port of the second hydraulic motor, and the T port of the first two-position four-way reversing valve is connected to the oil tank.

4. The dual-motor drive system of a crusher according to claim 3, characterized in that: The second reversing assembly includes: a second two-position four-way reversing valve and a second cartridge valve; the second oil port of the first hydraulic pump is connected to the A chamber of the second cartridge valve, the A chamber of the second cartridge valve is connected to the P port of the second two-position four-way reversing valve, the A port of the second two-position four-way reversing valve is connected to the control chamber of the second cartridge valve, the B port of the second two-position four-way reversing valve is connected to the B chamber of the second cartridge valve, the B chamber of the second cartridge valve is connected to the second oil port of the second hydraulic motor, and the T port of the second two-position four-way reversing valve is connected to the oil tank.

5. The dual-motor drive system of a crusher according to claim 4, characterized in that: The first two-position four-way directional control valve and / or the second two-position four-way directional control valve are electromagnetic directional control valves.

6. The dual-motor drive system of a crusher according to claim 1, characterized in that: The system further includes a second hydraulic pump, wherein the second hydraulic pump is connected in parallel with the first hydraulic pump.

7. The dual-motor drive system of a crusher according to claim 1, characterized in that: The first hydraulic pump is a bidirectional hydraulic pump, and the first hydraulic motor and the second hydraulic motor are both bidirectional hydraulic motors.

8. The dual-motor drive system of a crusher according to claim 1, characterized in that: A torque sensor is also included; the torque sensor is used to detect the torque of the main shaft of the crusher.

9. The dual-motor drive system of a crusher according to claim 8, characterized in that: It also includes a controller; the controller is electrically connected to the torque sensor and the switching component respectively.

10. A crusher, comprising the dual-motor drive system of the crusher according to any one of claims 1 to 9; the output shaft of the first hydraulic motor and the output shaft of the second hydraulic motor are connected to the main shaft of the crusher.

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