Rotary hydraulic control module and rotary working machine

Abstract

The invention belongs to the technical field of hydraulic control and provides a rotation hydraulic control module and a rotation operation machine.The rotation hydraulic control module comprises a rotation driving unit, a main reversing valve and an unlocking control valve, the rotation driving unit comprises a rotation motor and a motor locking piece, one side of the main reversing valve is connected with the rotation motor, and the other side of the main reversing valve is connected with the unlocking control valve; the main reversing valve is provided with a working valve position and a middle-position stop valve position, the middle-position stop valve position is communicated with a forward-rotation working oil way and a reverse-rotation working oil way of the rotary motor, one side of the unlocking control valve is connected with the pilot pressure oil way, and the other side of the unlocking control valve is connected with the motor locking piece. The unlocking control valve is used for controlling unlocking of the rotary motor. According to the module, the free centering function of the rotary table can be achieved only by controlling the unlocking control valve to reverse when the rotary table stops acting, the control object is single, the number of needed hydraulic elements is small, and cost is relatively low.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic control, and in particular relates to a rotary hydraulic control module and a rotary operating machine. Background Art

[0002] Rotating work machinery such as truck cranes and boom-type aerial work vehicles are all equipped with a boom rotation function. In addition to the basic rotation function, the boom also has a very important function called the free centering function. This function allows the turntable to rotate to the middle position under the action of the load gravity when there is no rotation driving force. The free centering function requires the control of the slewing motor to be in a floating state, and the control of the slewing motor to release the lock of the turntable. The existing technology generally uses two sets of reversing valves to control the floating of the slewing motor and the unlocking of the turntable respectively. This control method requires the two sets of reversing valves to act synchronously. Controlling two sets of reversing valves at the same time will not only make the control logic complicated, but also increase the system cost. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a rotary hydraulic control module and a rotary working machine, aiming to solve the technical problems of the existing rotary working machine's free centering function having complex control logic and high implementation cost.

[0004] To achieve the above-mentioned purpose, the present invention provides a rotary hydraulic control module, which includes a rotary drive unit, a main reversing valve and an unlocking control valve. The rotary drive unit includes a rotary motor and a motor locking member. The motor locking member is used to lock the turntable. One side of the main reversing valve is connected to the rotary motor, and the other side is connected to the system pressure oil circuit and the system return oil circuit. The main reversing valve is provided with a working valve position and a middle stop valve position for directing the pressure oil to the rotary motor. The middle stop valve position conducts the forward working oil circuit and the reverse working oil circuit of the rotary motor. One side of the unlocking control valve is connected to the pilot pressure oil circuit, and the other side is connected to the motor locking member. The unlocking control valve is used to selectively direct the hydraulic oil of the pilot pressure oil circuit to the motor locking member to control the unlocking of the rotary motor.

[0005] In an embodiment of the present invention, the main reversing valve includes a valve housing and a valve core, the valve housing is provided with an oil inlet working chamber for connecting to a system pressure oil circuit, an oil return working chamber for connecting to a system return oil circuit, a first working chamber and a second working chamber for respectively connecting a forward working oil circuit and a reverse working oil circuit, the valve core is arranged in the valve housing and is used to control the conduction of the corresponding working chamber according to the stroke; wherein, when the valve core moves to the middle stop valve position, a first conducting channel is formed between the return oil working chamber and the first working chamber, and between the return oil working chamber and the second working chamber.

[0006] In an embodiment of the present invention, the first conducting channel is a throttling channel.

[0007] In an embodiment of the present invention, a cross-sectional size of the first conducting channel gradually decreases from an end away from the oil return working chamber to an end connected to the oil return working chamber.

[0008] In an embodiment of the present invention, the working valve position includes a forward drive valve position for guiding the pressure oil to the forward working oil circuit and a reverse drive valve position for guiding the pressure oil to the reverse working oil circuit; wherein, when the valve core moves to the forward drive valve position, a second conducting channel is formed between the oil inlet working chamber and the first working chamber, and a third conducting channel is formed between the oil inlet working chamber and the oil return working chamber, and the third conducting channel is a throttling channel; when the valve core moves to the reverse drive valve position, a fourth conducting channel is formed between the oil inlet working chamber and the second working chamber, and a fifth conducting channel is formed between the oil inlet working chamber and the oil return working chamber, and the fifth conducting channel is a throttling channel.

[0009] In an embodiment of the present invention, a cross-sectional size of the third conducting channel and / or the fifth conducting channel gradually decreases from an end away from the oil return working chamber to an end connected to the oil return working chamber.

[0010] In an embodiment of the present invention, the second conducting channel and the fourth conducting channel are one-way channels formed in the valve core, and a one-way control component is provided in the one-way channel. The one-way control component is configured to be conductive when the pressure oil in the oil inlet working chamber flows to the corresponding first working chamber or the second working chamber, and to be blocked in the reverse direction.

[0011] In an embodiment of the present invention, an abutment step is formed in the one-way channel, and the abutment surface of the abutment step is facing away from the one-way channel and is used to set an opening on one side of the oil inlet working chamber. The one-way control component includes a blocking body arranged in the one-way channel and an elastic member for pushing the blocking body toward the abutment surface of the abutment step.

[0012] In an embodiment of the present invention, the unlocking control valve is provided with a first oil port and a second oil port located on the oil inlet and return port side, and a third oil port located on the working oil port side, the first oil port is connected to the pilot pressure oil circuit, the second oil port is used for return oil, the working oil port is connected to the motor locking member, and the unlocking control valve is provided with an unlocking valve position and a locking valve position, the unlocking valve position is configured to connect the first oil port and the third oil port, and the locking valve position is configured to connect the second oil port and the third oil port.

[0013] In an embodiment of the present invention, the swing hydraulic control module also includes a linkage valve, which includes a fourth oil port and a fifth oil port located on the oil inlet and return port side, and a sixth oil port located on the working oil port side, the fourth oil port and the fifth oil port are respectively connected to the pilot pressure oil circuit and the pilot oil drain circuit, the sixth oil port is connected to the second oil port, and the linkage valve is provided with a linkage unlocking valve position and an oil drain valve position, the linkage unlocking valve position is configured to conduct the fourth oil port and the sixth oil port, the oil drain valve position is configured to conduct the fifth oil port and the sixth oil port, the linkage valve is normally maintained in the oil drain valve position, and the pilot control end of the linkage valve close to the linkage unlocking valve position is connected to the swing start control oil circuit.

[0014] To achieve the above object, the present invention further provides a hydraulic system for a rotary working machine, wherein the hydraulic system for the rotary working machine comprises the rotary hydraulic control module described above.

[0015] To achieve the above object, the present invention further provides a rotary working machine, wherein the rotary working machine comprises the hydraulic system of the rotary working machine described above.

[0016] Through the above technical solution, the rotary hydraulic control module provided by the embodiment of the present invention has the following beneficial effects:

[0017] When the turntable needs to move, the main reversing valve will switch to the working valve position, and when the turntable needs to stop moving, the main reversing valve will switch to the middle stop valve position. After the main reversing valve is switched to the middle stop valve position, the forward working oil circuit and the reverse working oil circuit of the slewing motor are connected, and the slewing motor is in a floating state. At this time, the free centering function of the turntable can be realized by controlling the action of the unlocking control valve to control the motor locking part to unlock. In summary, the slewing hydraulic control module in the present invention only needs to control the unlocking control valve when the turntable stops moving, so as to realize the free centering function of the turntable. Not only does it require a single object to be controlled, but it also requires fewer hydraulic components and has a relatively low cost.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 is a hydraulic principle diagram of a rotary hydraulic control module according to an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of a main reversing valve in a first implementation manner according to an embodiment of the present invention when the main reversing valve is in a neutral stop valve position;

[0022] Figure 3 is a structural schematic diagram of a main reversing valve in a working valve position according to a first implementation mode in an embodiment of the present invention;

[0023] Figure 4 is a structural schematic diagram of a main reversing valve in a second implementation manner according to an embodiment of the present invention when the main reversing valve is in a neutral stop valve position;

[0024] Figure 5 is a structural schematic diagram of a main reversing valve in a second implementation manner according to an embodiment of the present invention when the main reversing valve is in a forward driving valve position;

[0025] Figure 6 1 is a schematic structural diagram of a main reversing valve in a second embodiment according to the present invention when the main reversing valve is in a reverse driving valve position.

[0026] Description of Reference Numerals

[0027] 1. Rotary drive unit; 11. Rotary motor; 111. Forward working oil circuit; 112. Reverse working oil circuit; 12. Motor locking member; 2. Main reversing valve; 21. Valve housing; 211. Oil inlet working chamber; 212. Oil return working chamber; 213. First working chamber; 214. Second working chamber; 215. First conduction channel; 216. Second conduction channel; 217. Third conduction channel; 218. Fourth conduction channel; 219. Fifth conduction channel; 21 10. Abutment step; 22. Valve core; 23. One-way control assembly; 231. Blocking body; 232. Elastic member; 3. Unlocking control valve; 31. First oil port; 32. Second oil port; 33. Third oil port; 4. Linkage valve; 41. Fourth oil port; 42. Fifth oil port; 43. Sixth oil port; 51. System pressure oil circuit; 52. System return oil circuit; 53. Pilot pressure oil circuit; 54. Pilot drain oil circuit; 6. Swing start control oil circuit; 7. One-way oil supply circuit. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] The swing hydraulic control module of the present invention will be described below with reference to the accompanying drawings.

[0030] The present invention provides a rotary hydraulic control module, wherein: Figure 1 As shown, the swing hydraulic control module includes a swing drive unit 1, a main reversing valve 2 and an unlocking control valve 3:

[0031] The slewing drive unit 1 includes a slewing motor 11 and a motor locking member 12. The slewing motor 11 is used to drive the turntable to rotate, and the motor locking member 12 is used to lock the turntable. Only when the motor locking member 12 is unlocked, the slewing motor 11 can drive the turntable to rotate forward or reverse under the action of pressure oil.

[0032] One side of the main reversing valve 2 is hydraulically connected to the swing motor 11, and the other side is hydraulically connected to the system pressure oil circuit 51 and the system return oil circuit 52. The main reversing valve 2 is provided with a middle stop valve position and a working valve position for directing the pressure oil to the swing motor 11. The middle stop valve position cuts off the system pressure oil circuit 51 from the swing motor 11, that is, in the middle stop valve position, the pressure oil in the system pressure oil circuit 51 cannot enter the working oil circuit of the swing motor 11, and the middle stop valve position also conducts the forward working oil circuit 111 of the swing motor 11 with the reverse working oil circuit 112, so that the swing motor 11 is in a floating state.

[0033] One side of the unlocking control valve 3 is hydraulically connected to the pilot pressure oil circuit 53, and the other side is hydraulically connected to the motor locking member 12. The unlocking control valve 3 is used to selectively guide the hydraulic oil of the pilot pressure oil circuit 53 to the motor locking member 12 to control the unlocking of the slewing motor 11. When the unlocking control valve 3 guides the pilot pressure oil in the pilot pressure oil circuit 53 to the motor locking member 12, the motor locking member 12 will release the lock on the turntable.

[0034] When the turntable needs to move, the main reversing valve 2 will switch to the working valve position, and when the turntable needs to stop moving, the main reversing valve 2 will switch to the middle stop valve position. After the main reversing valve 2 is switched to the middle stop valve position, since the forward working oil circuit 111 and the reverse working oil circuit 112 of the slewing motor 11 are connected, the slewing motor 11 is in a floating state. At this time, the free centering function of the turntable can be realized by controlling the action of the unlocking control valve 3 to control the motor locking member 12 to unlock. In summary, the slewing hydraulic control module in the present invention only needs to control the unlocking control valve 3 when the turntable stops moving, so as to realize the free centering function of the turntable. Not only does it require a single object to be controlled, but it also requires fewer hydraulic components and has a relatively low cost.

[0035] In an embodiment of the present invention, the neutral shut-off valve position connects the forward working oil circuit 111 and the reverse working oil circuit 112. The forward working oil circuit 111 and the reverse working oil circuit 112 may be directly connected, or the forward working oil circuit 111 and the reverse working oil circuit 112 may be connected to the system return oil circuit 52 at the same time.

[0036] Take the second case as an example, Figure 2 and Figure 4As shown, in the embodiment of the present invention, the main reversing valve 2 includes a valve housing 21 and a valve core 22. The valve housing 21 is provided with an oil inlet working chamber 211 for connecting to the system pressure oil circuit 51, an oil return working chamber 212 for connecting to the system oil return circuit 52, and a first working chamber 213 and a second working chamber 214 for connecting to the forward working oil circuit 111 and the reverse working oil circuit 112 respectively. The valve core 22 is arranged in the valve housing 21 and is used to control the conduction of the corresponding working chamber according to the moving stroke to realize the switching of the valve position. When the valve core 22 moves to the position corresponding to the middle stop valve position, a first conduction channel 215 is formed between the oil return working chamber 212 and the first working chamber 213, and between the oil return working chamber 212 and the second working chamber 214. The first conduction channel 215 can be a gap channel formed between the valve housing 21 and the peripheral wall of the valve core 22, or the first conduction channel 215 can be a channel opened in the valve core 22.

[0037] In an embodiment of the present invention, the first conduction channel 215 may be a throttling channel. That is, the cross-sectional area of ​​the first conduction channel 215 is small, and the maximum flow rate allowed to pass through the first conduction channel 215 is much smaller than the flow rate of the forward working oil circuit 111 and the reverse working oil circuit 112 when the pressure is released and the oil is returned in the working valve position. By setting the throttling function, the return oil rate of the forward working oil circuit 111 and the reverse working oil circuit 112 can be controlled, thereby controlling the rotation rate of the turntable free centering, and avoiding the turntable free rotation too fast to cause a safety accident.

[0038] In the embodiment of the present invention, the ratio of the maximum flow rate that can flow through the first conduction channel 215 to the maximum flow rate of the working oil circuit when the main reversing valve is in the working valve position to release pressure and return oil is 1:30-1:50, that is, the ratio of the minimum cross-sectional area of ​​the first conduction channel 215 to the minimum cross-sectional area of ​​the return oil channel is 1:30-1:50. The return oil channel refers to the channel formed between the corresponding one of the first working chamber 213 and the second working chamber 214 and the return oil working chamber 212 when the valve core is in the working valve position.

[0039] In the embodiment of the present invention, the cross-sectional size of the first conducting channel gradually decreases from the end away from the oil return working chamber to the end connected to the oil return working chamber. By setting the first conducting channel as a variable cross-sectional channel, the first conducting channel 215 can have better anti-impact capability and hydraulic buffering effect.

[0040] like Figure 1 As shown, in the embodiment of the present invention, when the valve core 22 moves to the middle stop valve position, the oil inlet working chamber 211 is connected to the oil return working chamber 212, and a one-way oil replenishment passage 7 is formed between the oil inlet working chamber 211 and the forward working oil circuit 111, and between the oil inlet working chamber 211 and the reverse working oil circuit 112. The one-way oil replenishment passage 7 is used to replenish oil to the forward working oil circuit 111 or the reverse working oil circuit 112 in one direction.

[0041] In the embodiment of the present invention, the working valve position of the main reversing valve 2 includes a forward driving valve position ( Figure 1 The left valve position in the middle), and the reverse drive valve position ( Figure 1 right valve position in the middle).

[0042] During the rotation of the turntable, the oil pressure of the system pressure oil circuit 51 fluctuates greatly due to the load change, causing the turntable to vibrate. To this end, the present invention also optimizes the working state of the working valve position of the main reversing valve 2.

[0043] Specifically, Figure 3 and Figure 5 As shown, when the valve core 22 moves to the forward driving valve position, the oil inlet working chamber 211 and the first working chamber 213 are connected to form a second conducting channel 216, and the oil inlet working chamber 211 and the return oil working chamber 212 are connected to form a third conducting channel 217. The third conducting channel 217 is a throttling channel and the maximum flow rate that can flow is much smaller than the maximum flow rate of the second conducting channel 216. The flow rate ratio / cross-sectional area ratio of the two is about 1:50-1:70, so as to ensure the normal pressure building of the system. After the hydraulic oil of the system oil inlet circuit enters the oil inlet working chamber 211, it will flow to the second conducting channel 216 first. When the oil pressure of the system pressure oil circuit 51 fluctuates and exceeds the maximum flow rate of the second conducting channel 216 or the corresponding working oil circuit, the excess hydraulic oil can overflow through the third conducting channel 217. Through the third conducting channel 217, the pressure shock wave of the system pressure oil circuit 51 can be suppressed and filtered, thereby ensuring the stability of the turntable operation.

[0044] Likewise, if Figure 6 As shown, when the valve core 22 moves to the reverse drive valve position, the oil inlet working chamber 211 and the second working chamber 214 are connected to form a fourth conducting channel 218, and the oil inlet working chamber 211 and the oil return working chamber 212 are connected to form a fifth conducting channel 219, and the fifth conducting channel 219 is a throttling channel.

[0045] In the embodiment of the present invention, the cross-sectional size of the third conducting channel and / or the fifth conducting channel gradually decreases from the end away from the oil return working chamber to the end connected to the oil return working chamber. By setting the third conducting channel and / or the fifth conducting channel as a variable cross-sectional channel, the main reversing valve 2 has a better impact resistance and a better filtering effect.

[0046] When the hydraulic system in the rotary machine starts to work, the hydraulic pump needs to run for a long time to build up the pressure of the system pressure oil circuit 51. Before the pressure building is completed, if the main reversing valve 2 is directly controlled to switch to the working valve position, the oil pressure of the working oil circuit may be greater than the oil pressure of the system pressure oil circuit 51, and the turntable may drive the rotary motor 11 to reverse. In particular, when the turntable is working on a slope, the probability of reversal is greater.

[0047] For this reason, Figure 1 As shown, the present invention further optimizes the structure of the main reversing valve 2, and configures the second conducting channel 216 and the fourth conducting channel 218 as one-way channels. The one-way channels only allow the pressure oil in the oil inlet working chamber 211 to flow to the working oil circuit of the rotary motor 11 and block the reverse direction.

[0048] In order to realize the one-way function of the channel, such as Figure 4 , Figure 5 and Figure 6 As shown, in the embodiment of the present invention, the second conducting channel 216 and the fourth conducting channel 218 can be arranged on the valve core 22, and a one-way control component 23 can be arranged in the second conducting channel 216 and the fourth conducting channel 218. The one-way control component 23 is configured to conduct when the pressure oil of the oil inlet working chamber 211 flows to the first working chamber 213 or the second working chamber 214, and to cut off when the pressure oil flows in the opposite direction.

[0049] Specifically, the one-way control component 23 may include a blocking body 231 and an elastic member 232. An abutment step 2110 is formed in the one-way channel. The abutment surface of the abutment step 2110 is facing away from the one-way channel and is used to connect an opening on one side of the oil inlet working chamber 211 (211). The blocking body 231 is located in the one-way channel, and the elastic member 232 is used to push the blocking body 231 toward the abutment surface of the abutment step 2110.

[0050] like Figure 5 and Figure 6 As shown, when the pressure oil in the oil inlet working chamber 211 enters the one-way channel, it will overcome the resistance of the elastic body and push the blocking body 231 open, so that the hydraulic oil flows to the corresponding working chamber, and the conduction between the oil inlet working chamber 211 and the working chamber is realized. When the oil pressure in the working chamber is too high, the connection between the oil inlet working chamber 211 and the working chamber is cut off due to the support of the elastic body by the abutment step 2110.

[0051] In the embodiment of the present invention, the elastic member 232 may be a spring. The blocking body 231 may be spherical, square, or the like.

[0052] like Figure 1As shown, in an embodiment of the present invention, the unlocking control valve 3 is provided with a first oil port 31 and a second oil port 32 located on the oil inlet and return port side, and a third oil port 33 located on the working oil port side, the first oil port 31 is connected to the pilot pressure oil circuit 53, the second oil port 32 is used for oil return, the working oil port is connected to the motor locking member 12, and the unlocking control valve 3 is provided with an unlocking valve position and a locking valve position, the unlocking valve position is configured to connect the first oil port 31 and the third oil port 33, and the locking valve position is configured to connect the second oil port 32 and the third oil port 33.

[0053] The unlocking control valve 3 may be a two-position three-way valve, and may be a solenoid valve, a hydraulic pilot valve, etc. The unlocking control valve 3 is normally kept in the locking valve position ( Figure 1 When the unlocking control valve 3 is in the locking valve position, the third oil port 33 is connected to the second oil port 32, and the motor locking member 12 is in the state of depressurizing and locking the turntable. Figure 1 When the third oil port 33 is in the lower position, the third oil port 33 is connected to the first oil port 31, and the pilot pressure oil flows to the motor locking member 12 to unlock the turntable.

[0054] like Figure 1 As shown, in the embodiment of the present invention, the swing hydraulic control module further includes a linkage valve 4, which includes a fourth oil port 41 and a fifth oil port 42 located on the oil inlet and return port side, and a sixth oil port 43 located on the working oil port side. The fourth oil port 41 and the fifth oil port 42 are connected to the pilot pressure oil circuit 53 and the pilot drain oil circuit 54 respectively, and the sixth oil port 43 is connected to the second oil port 32. The linkage valve 4 is provided with a linkage unlocking valve position ( Figure 1 The upper position in the oil drain valve position ( Figure 1 The linkage unlocking valve position is configured to conduct the fourth oil port 41 and the sixth oil port 43, and the drain valve position is configured to conduct the fifth oil port 42 and the sixth oil port 43. The linkage valve 4 is normally kept in the drain valve position, and the pilot control end of the linkage valve 4 close to the linkage unlocking valve position is connected to the swing start control oil circuit 6.

[0055] The linkage valve 4 can also be a two-position three-way valve, and can also be a solenoid valve, a hydraulic pilot valve, etc. The linkage valve 4 is normally maintained in the pressure relief valve position under the action of the reset spring, that is, under normal conditions, the motor locking member 12 is in a state of locking the turntable. When the operator needs to perform a rotation operation, by controlling the corresponding handle, the rotation start control oil circuit 6 can form high pressure, and the high-pressure oil in the rotation start control oil circuit 6 will drive the linkage valve 4 to overcome the reset spring for reversing. At this time, the pilot pressure oil flows to the motor locking member 12 through the fourth oil port 41, the sixth oil port 43, the second oil port 32, and the third oil port 33 in sequence, realizing the locking of the motor locking member 12. That is, the rotary hydraulic control module in the present invention can realize the hydraulic linkage unlocking of the motor locking member 12 by simply operating the rotary handle.

[0056] like Figure 1 As shown, in an embodiment of the present invention, the swing start control oil circuit 6 is also connected to the pilot control end of the main reversing valve 2. When the swing start control oil circuit 6 forms a high pressure, it will also drive the main reversing valve 2 to switch direction accordingly.

[0057] like Figure 1 As shown, in the embodiment of the present invention, the swing start control oil circuit 6 includes a left swing control oil circuit and a right swing control oil circuit, and the pilot control end of the linkage valve 4 is connected between the left swing control oil circuit and the right swing control oil circuit through a shuttle valve. The left swing control oil circuit and the right swing control oil circuit are controlled by the left handle and the right handle respectively.

[0058] To achieve the above object, the present invention further provides a hydraulic system for a rotary working machine, wherein the hydraulic system for the rotary working machine includes the rotary hydraulic control module described above. Since the hydraulic system for the rotary working machine adopts all the technical solutions of the above embodiments, it has at least the beneficial effects brought by the above embodiments, which will not be repeated here.

[0059] To achieve the above object, the present invention further provides a rotary working machine, wherein the rotary working machine comprises the hydraulic system of the rotary working machine described above. The rotary working machine can be a truck crane, a boom-type aerial work vehicle, and the like.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rotary hydraulic control module, characterized in that: The rotary hydraulic control module includes: A rotary drive unit (1) comprises a rotary motor (11) and a motor locking member (12), wherein the motor locking member (12) is used to lock the turntable; A main reversing valve (2), one side of which is connected to the rotary motor (11), and the other side of which is connected to the system pressure oil circuit (51) and the system return oil circuit (52), the main reversing valve (2) being provided with a working valve position and a middle stop valve position for directing pressure oil to the rotary motor (11), the middle stop valve position conducting the forward working oil circuit (111) and the reverse working oil circuit (112) of the rotary motor (11); An unlocking control valve (3) is connected to a pilot pressure oil circuit (53) on one side and to the motor locking member (12) on the other side. The unlocking control valve (3) is used to selectively direct the hydraulic oil of the pilot pressure oil circuit (53) to the motor locking member (12) to control the unlocking of the turntable.

2. The rotary hydraulic control module according to claim 1, characterized in that: The main reversing valve (2) comprises a valve housing (21) and a valve core (22); the valve housing (21) is provided with an oil inlet working chamber (211) for communicating with the system pressure oil circuit (51), an oil return working chamber (212) for communicating with the system return oil circuit (52), and a first working chamber (213) and a second working chamber (214) for respectively communicating with the forward working oil circuit (111) and the reverse working oil circuit (112); the valve core (22) is arranged in the valve housing (21) and is used to control the conduction of the corresponding working chambers according to the stroke; Wherein, when the valve core (22) moves to the middle stop valve position, a first conducting channel (215) is formed between the oil return working chamber (212) and the first working chamber (213), and between the oil return working chamber (212) and the second working chamber (214).

3. The rotary hydraulic control module according to claim 2, characterized in that: The first conducting channel (215) is a throttling channel.

4. The rotary hydraulic control module according to claim 3, characterized in that: The cross-sectional size of the first conducting channel (215) gradually decreases from an end away from the oil return working chamber (212) to an end connected to the oil return working chamber (212).

5. The rotary hydraulic control module according to claim 2, characterized in that: The working valve position comprises a forward driving valve position for directing the pressure oil to the forward working oil circuit (111) and a reverse driving valve position for directing the pressure oil to the reverse working oil circuit (112); When the valve core (22) moves to the forward driving valve position, a second conducting channel (216) is formed between the oil inlet working chamber (211) and the first working chamber (213), and a third conducting channel (217) is formed between the oil inlet working chamber (211) and the oil return working chamber (212), and the third conducting channel (217) is a throttling channel; When the valve core (22) moves to the reverse driving valve position, a fourth conducting channel (218) is formed between the oil inlet working chamber (211) and the second working chamber (214), and a fifth conducting channel (219) is formed between the oil inlet working chamber (211) and the oil return working chamber (212), and the fifth conducting channel (219) is a throttling channel.

6. The rotary hydraulic control module according to claim 5, characterized in that: The cross-sectional size of the third conducting channel (217) and / or the fifth conducting channel (219) gradually decreases from an end away from the oil return working chamber (212) to an end connected to the oil return working chamber (212).

7. The rotary hydraulic control module according to claim 5, characterized in that: The second conducting channel (216) and the fourth conducting channel (218) are one-way channels formed in the valve core (22), and a one-way control component (23) is provided in the one-way channel. The one-way control component (23) is configured to conduct when the pressure oil in the oil inlet working chamber (211) flows to the corresponding first working chamber (213) or the second working chamber (214), and to block in the reverse direction.

8. The rotary hydraulic control module according to claim 7, characterized in that: An abutment step (2110) is formed in the one-way channel, and the abutment surface of the abutment step (2110) is arranged opposite to the one-way channel and is used to conduct the opening on one side of the oil inlet working chamber (211). The one-way control component (23) includes a blocking body (231) arranged in the one-way channel and an elastic member (232) used to push the blocking body (231) toward the abutment surface of the abutment step (2110).

9. The rotary hydraulic control module according to any one of claims 1 to 8, characterized in that: The unlocking control valve (3) is provided with a first oil port (31) and a second oil port (32) located on the oil inlet and return port side, and a third oil port (33) located on the working oil port side, the first oil port (31) is connected to the pilot pressure oil circuit (53), the second oil port (32) is used for oil return, the working oil port is connected to the motor locking member (12), the unlocking control valve (3) is provided with an unlocking valve position and a locking valve position, the unlocking valve position is configured to conduct the first oil port (31) and the third oil port (33), and the locking valve position is configured to conduct the second oil port (32) and the third oil port (33).

10. The rotary hydraulic control module according to claim 9, characterized in that: The swing hydraulic control module further comprises a linkage valve (4), the linkage valve (4) comprising a fourth oil port (41) and a fifth oil port (42) located on the oil inlet and return port side, and a sixth oil port (43) located on the working oil port side, the fourth oil port (41) and the fifth oil port (42) being connected to the pilot pressure oil circuit (53) and the pilot oil drain circuit (54) respectively, the sixth oil port (43) being connected to the second oil port (32), the linkage valve (4) being provided with a linkage unlocking valve position and an oil draining valve position, the linkage unlocking valve position being configured to conduct the fourth oil port (41) and the sixth oil port (43), the oil draining valve position being configured to conduct the fifth oil port (42) and the sixth oil port (43), the linkage valve (4) being normally maintained at the oil draining valve position, and the pilot control end of the linkage valve (4) close to the linkage unlocking valve position being connected to the swing start control oil circuit (6).

11. A rotary working machine, characterized in that: It comprises a hydraulic system, wherein the hydraulic system comprises a swing hydraulic control module according to any one of claims 1 to 10.

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