Slewing hydraulic control module and slewing machinery

Abstract

This invention belongs to the field of hydraulic control technology and provides a rotary hydraulic control module and a rotary working machine. The rotary hydraulic control module includes a rotary drive unit, a main directional valve, and an unlocking control valve. The rotary drive unit includes a rotary motor and a motor locking component. One side of the main directional 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 directional valve has a working valve position and a neutral stop valve position. The neutral stop valve position connects the forward and reverse working oil circuits 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 component. The unlocking control valve is used to control the unlocking of the rotary motor. This module only needs to control the unlocking control valve to switch directions when the turntable stops moving to achieve the free centering function of the turntable. It not only controls a single object but also requires fewer hydraulic components, resulting in relatively low cost.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic control technology, specifically relating to a rotary hydraulic control module and a rotary working machine. Background Technology

[0002] Slewing machinery such as truck cranes and boom-type aerial work platforms all have boom slewing capabilities. Besides the basic slewing function, a crucial feature on the boom is free centering. This function allows the turntable to rotate to the center position under the load's weight without any slewing drive force. Free centering requires controlling the slewing motor to be in a floating state and also requires controlling the slewing motor to release the lock on the turntable. Current technology typically uses two sets of directional valves to separately control the slewing motor's floating and the turntable's unlocking. This control method requires both sets of directional valves to operate synchronously. Simultaneously controlling two sets of directional valves not only complicates the control logic but also increases system costs. Summary of the Invention

[0003] To address the aforementioned deficiencies or shortcomings, this invention provides a slewing hydraulic control module and a slewing machine, aiming to solve the technical problems of complex control logic and high implementation cost of the free centering function in existing slewing machines.

[0004] To achieve the above objectives, the present invention provides a rotary hydraulic control module, which includes a rotary drive unit, a main directional valve, and an unlocking control valve. The rotary drive unit includes a rotary motor and a motor locking element. The motor locking element is used to lock the turntable. One side of the main directional 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 directional valve is provided with a working valve position and a neutral stop valve position for guiding pressure oil to the rotary motor. The neutral stop valve position opens 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 element. The unlocking control valve is used to selectively guide the hydraulic oil in the pilot pressure oil circuit to the motor locking element to control the unlocking of the rotary motor.

[0005] In an embodiment of the present invention, the main directional valve includes a valve body and a valve core. The valve body is provided with an inlet working chamber for connecting to the system pressure oil circuit, a return working chamber for connecting to the system return oil circuit, a first working chamber and a second working chamber for connecting to the forward working oil circuit and the reverse working oil circuit respectively. The valve core is disposed in the valve body and is used to control the conduction of the corresponding working chamber according to the stroke. Wherein, when the valve core moves to the neutral stop valve position, a first conduction channel is formed between the return working chamber and the first working chamber, and between the return working chamber and the second working chamber.

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

[0007] In an embodiment of the present invention, the cross-sectional size of the first conductive channel gradually decreases from the end away from the oil return working chamber to the 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 pressure oil to the forward working oil circuit and a reverse drive valve position for guiding pressure oil to the reverse working oil circuit; wherein, when the valve core moves to the forward drive valve position, a second conductive channel is formed between the oil inlet working chamber and the first working chamber, and a third conductive channel is formed between the oil inlet working chamber and the oil return working chamber, the third conductive channel being a throttling channel; when the valve core moves to the reverse drive valve position, a fourth conductive channel is formed between the oil inlet working chamber and the second working chamber, and a fifth conductive channel is formed between the oil inlet working chamber and the oil return working chamber, the fifth conductive channel being a throttling channel.

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

[0010] In an embodiment of the present invention, the second and fourth conduction channels are one-way channels formed in the valve core. The one-way channels are provided with one-way control components. The one-way control components are configured to conduct when the pressure oil in the oil inlet working chamber flows to the corresponding first or second working chamber and to cut off in the reverse direction.

[0011] In an embodiment of the present invention, a step is formed in the one-way channel, and the abutting surface of the step faces away from the one-way channel to facilitate the opening on one side of the oil inlet working chamber. The one-way control component includes a blocker disposed in the one-way channel and an elastic member for pushing the blocker toward the abutting surface of the 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 inlet and return oil 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 oil return, and the working oil port is connected to the motor locking element. The unlocking control valve is provided with an unlocking valve position and a locking valve position. The unlocking valve position is configured to open the first oil port and the third oil port, and the locking valve position is configured to open the second oil port and the third oil port.

[0013] In an embodiment of the present invention, the rotary hydraulic control module further includes a linkage valve, which includes a fourth oil port and a fifth oil port located on the inlet and return oil 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 drain oil circuit, and the sixth oil port is connected to the second oil port. The linkage valve has a linkage unlock valve position and a drain valve position. The linkage unlock valve position is configured to open the fourth oil port and the sixth oil port, and the drain valve position is configured to open the fifth oil port and the sixth oil port. The linkage valve is normally held in the drain valve position, and the pilot control end of the linkage valve near the linkage unlock valve position is connected to the rotary start control oil circuit.

[0014] To achieve the above objectives, the present invention also provides a hydraulic system for a rotary working machine, wherein the hydraulic system of the rotary working machine includes the rotary hydraulic control module as described above.

[0015] To achieve the above objectives, the present invention also provides a rotary working machine, wherein the rotary working machine includes a hydraulic system according to the rotary working machine described above.

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

[0017] When the turntable needs to move, the main directional valve switches to the working position; when the turntable needs to stop, the main directional valve switches to the neutral shut-off position. After the main directional valve switches to the neutral shut-off position, the rotary motor's forward and reverse working oil circuits are connected, and the rotary motor is in a floating state. At this time, by controlling the unlocking control valve to unlock the motor locking components, the turntable's free centering function can be achieved. In summary, the rotary hydraulic control module of this invention only needs to control the unlocking control valve when the turntable stops to achieve the turntable's free centering function. It not only requires a single controlled object but also requires fewer hydraulic components, resulting in relatively low cost.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

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

[0021] Figure 2 This is a schematic diagram of the main directional valve in the neutral shut-off position according to the first embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the main directional valve in the working position according to the first embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the main directional valve in the neutral shut-off position according to the second embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the main directional valve in the forward drive valve position according to the second embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the main directional valve in the reverse drive valve position according to the second embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Rotary drive unit; 11. Rotary motor; 111. Forward working oil circuit; 112. Reverse working oil circuit; 12. Motor locking component; 2. Main directional valve; 21. Valve housing; 211. Oil inlet working chamber; 212. Oil return working chamber; 213. First working chamber; 214. Second working chamber; 215. First conductive channel; 216. Second conductive channel; 217. Third conductive channel; 218. Fourth conductive channel; 219. Fifth conductive channel; 21 10. Abutting platform; 22. Valve core; 23. One-way control component; 231. Blocking body; 232. Elastic element; 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. Rotation start control oil circuit; 7. One-way replenishment oil circuit. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

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

[0030] This invention provides a rotary hydraulic control module, wherein, as Figure 1 As shown, the slewing hydraulic control module includes a slewing drive unit 1, a main directional valve 2, and an unlocking control valve 3.

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

[0032] One side of the main directional valve 2 is hydraulically connected to the rotary 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 directional valve 2 has a neutral shut-off valve position and a working valve position for guiding pressure oil to the rotary motor 11. The neutral shut-off valve position cuts off the system pressure oil circuit 51 from the rotary motor 11. That is, in the neutral shut-off valve position, the pressure oil in the system pressure oil circuit 51 cannot enter the working oil circuit of the rotary motor 11. In addition, the neutral shut-off valve position also connects the forward working oil circuit 111 and the reverse working oil circuit 112 of the rotary motor 11, so that the rotary 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 element 12. The unlocking control valve 3 is used to selectively direct the hydraulic oil in the pilot pressure oil circuit 53 to the motor locking element 12 to control the unlocking of the rotary motor 11. When the unlocking control valve 3 directs the pilot pressure oil in the pilot pressure oil circuit 53 to the motor locking element 12, the motor locking element 12 will release the lock on the turntable.

[0034] When the turntable needs to move, the main directional valve 2 switches to the working position, and when the turntable needs to stop moving, the main directional valve 2 switches to the neutral stop position. After the main directional valve 2 switches to the neutral stop position, since the forward working oil circuit 111 and the reverse working oil circuit 112 of the rotary motor 11 are connected, the rotary motor 11 is in a floating state. At this time, by controlling the unlocking control valve 3 to unlock the motor locking component 12, the free centering function of the turntable can be realized. In summary, the rotary hydraulic control module of this invention only needs to control the unlocking control valve 3 when the turntable stops moving to realize the free centering function of the turntable. It not only requires a single controlled object, but also requires fewer hydraulic components, resulting in relatively low cost.

[0035] In an embodiment of the present invention, the neutral stop valve position connects the forward working oil circuit 111 and the reverse working oil circuit 112. This can be either a direct connection between the forward working oil circuit 111 and the reverse working oil circuit 112, or a simultaneous connection between the forward working oil circuit 111 and the reverse working oil circuit 112 and the system return oil circuit 52.

[0036] Taking the second scenario as an example, such as Figure 2 and Figure 4As shown, in an embodiment of the present invention, the main directional valve 2 includes a valve housing 21 and a valve core 22. The valve housing 21 is provided with an inlet working chamber 211 for connecting to the system pressure oil circuit 51, a return working chamber 212 for connecting to the system return oil 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 disposed in the valve housing 21 and is used to control the conduction of the corresponding working chamber according to the movement stroke to realize the switching of the valve position. When the valve core 22 moves to the position corresponding to the neutral stop valve position, a first conduction channel 215 is formed between the return working chamber 212 and the first working chamber 213, and between the return working chamber 212 and the second working chamber 214. The first conduction channel 215 can be a gap channel formed between the peripheral walls of the valve housing 21 and the valve core 22, or it can be a channel opened in the valve core 22.

[0037] In an embodiment of the present invention, the first conduction channel 215 can be a throttling channel. That is, the cross-sectional area of ​​the first conduction channel 215 is small, and the maximum flow rate allowed 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 returns at 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 speed of the turntable during free centering and avoiding safety accidents caused by the turntable rotating too fast.

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

[0039] In an embodiment of the present invention, the cross-sectional size of the first conductive channel gradually decreases from the end furthest from the return oil working chamber to the end connected to the return oil working chamber. By setting the first conductive channel as a variable cross-section channel, the first conductive channel 215 can have better shock resistance 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 neutral stop valve position, the oil inlet working chamber 211 and the oil return working chamber 212 are connected, and a one-way oil replenishment passage 7 is also formed between the oil inlet working chamber 211 and the forward working oil passage 111, and between the oil inlet working chamber 211 and the reverse working oil passage 112. The one-way oil replenishment passage 7 is used to replenish oil to the forward working oil passage 111 or the reverse working oil passage 112 in one direction.

[0041] In an embodiment of the present invention, the working valve position of the main directional valve 2 includes a forward drive valve position for directing pressure oil to the forward working oil passage 111 and connecting the reverse working oil passage 112 with the system return oil passage 52. Figure 1 The left valve position in the middle), and the reverse drive valve position for directing pressure oil to the reverse working oil circuit 112, and connecting the forward working oil circuit 111 to the system return oil circuit 52. Figure 1 (Right valve position in the middle).

[0042] During the rotation of the turntable, the oil pressure in the system pressure oil circuit 51 fluctuates significantly due to load changes, causing the turntable to vibrate. Therefore, this invention also optimizes the working state of the main directional valve 2.

[0043] Specifically, such as Figure 3 and Figure 5 As shown, when the valve core 22 moves to the forward drive valve position, the inlet working chamber 211 and the first working chamber 213 are connected to form a second conducting channel 216, and the inlet working chamber 211 and the return 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 it can flow through 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 approximately 1:50-1:70, thus ensuring the normal pressure build-up of the system. After the hydraulic oil in the system's inlet circuit enters the inlet working chamber 211, it will preferentially flow to the second conducting channel 216. When the oil pressure in the system's 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's pressure oil circuit 51 can be suppressed and filtered, thereby ensuring the smooth operation of the turntable.

[0044] Similarly, as 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 connecting channel 218, and the oil inlet working chamber 211 and the oil return working chamber 212 are connected to form a fifth connecting channel 219. The fifth connecting channel 219 is a throttling channel.

[0045] In embodiments of the present invention, the cross-sectional size of the third and / or fifth conducting channels gradually decreases from the end furthest from the return oil working chamber to the end connected to the return oil working chamber. By setting the third and / or fifth conducting channels as variable cross-section channels, the main directional valve 2 has better shock resistance and better filtering effect.

[0046] When the hydraulic system of a rotary work machine starts working, the hydraulic pump needs to run for a considerable period of time to build up pressure in the system pressure circuit 51. Before the pressure is fully built up, if the main directional valve 2 is directly switched to the working position, the oil pressure in the working circuit may be greater than the oil pressure in the system pressure circuit 51, causing the turntable to drive the rotary motor 11 in reverse. The probability of reverse rotation is even greater when the turntable is working on a slope.

[0047] Therefore, such as Figure 1 As shown, the present invention further optimizes the structure of the main directional valve 2 by configuring the second conduction channel 216 and the fourth conduction channel 218 as unidirectional channels. The unidirectional 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 are blocked in the reverse direction.

[0048] To achieve the unidirectional function of the channel, such as Figure 4 , Figure 5 and Figure 6 As shown, in embodiments of the present invention, the second conduction channel 216 and the fourth conduction channel 218 can be disposed on the valve core 22, and a one-way control component 23 can be disposed within the second conduction channel 216 and the fourth conduction channel 218. The one-way control component 23 is configured to open when the pressure oil in the oil inlet working chamber 211 flows to the first working chamber 213 or the second working chamber 214 and close in the reverse direction.

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

[0050] like Figure 5 and Figure 6 As shown, when the pressurized oil in the inlet working chamber 211 enters the one-way channel, it overcomes the resistance of the elastic body and pushes open the blockage body 231, allowing the hydraulic oil to flow to the corresponding working chamber, thus realizing the connection between the inlet working chamber 211 and the working chamber. When the oil pressure in the working chamber is too high, the connection between the inlet working chamber 211 and the working chamber is cut off due to the resistance of the elastic body by the abutment step 2110.

[0051] In embodiments of the present invention, the elastic element 232 can be a spring. The shape of the blocking body 231 can be spherical, square, etc.

[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 inlet and outlet oil 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, and 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 open the first oil port 31 and the third oil port 33, and the locking valve position is configured to open the second oil port 32 and the third oil port 33.

[0053] The unlocking control valve 3 can be a two-position three-way valve, and can be a solenoid valve, hydraulic pilot valve, etc. Under the action of the return spring, the unlocking control valve 3 normally remains in the locked position. Figure 1 (The upper position in the middle). When the unlocking control valve 3 is in the lock valve position, the third oil port 33 is connected to the second oil port 32, and the motor locking component 12 is in the state of depressurization locking turntable. When the unlocking control valve 3 is in the unlocking valve position ( Figure 1 When the third oil port 33 is connected to the first oil port 31 (in the lower position), the pilot pressure oil will flow to the motor locking component 12 to unlock the turntable.

[0054] like Figure 1 As shown, in an embodiment of the present invention, the rotary hydraulic control module further includes a linkage valve 4. The linkage valve 4 includes a fourth oil port 41 and a fifth oil port 42 located on the inlet and return oil port sides, 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 respectively connected to the pilot pressure oil circuit 53 and the pilot drain oil circuit 54, 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 (upper position) and drain valve position ( Figure 1 (In the lower position), the linkage unlocking valve position is configured to open the fourth oil port 41 and the sixth oil port 43, and the oil drain valve position is configured to open the fifth oil port 42 and the sixth oil port 43. The linkage valve 4 is normally kept in the oil drain valve position, and the pilot control end of the linkage valve 4 near the linkage unlocking valve position is connected to the rotary start control oil circuit 6.

[0055] The linkage valve 4 can also be a two-position three-way valve, or a solenoid valve, a hydraulic pilot valve, etc. Under the action of the return spring, the linkage valve 4 normally remains in the pressure relief valve position, meaning that under normal conditions, the motor locking element 12 is in the locked turntable state. When the operator needs to perform a rotation operation, by controlling the corresponding handle, the rotation start control oil circuit 6 can generate high pressure. The high-pressure oil in the rotation start control oil circuit 6 will drive the linkage valve 4 to overcome the return spring and reverse direction. At this time, the pilot pressure oil flows sequentially through the fourth oil port 41, the sixth oil port 43, the second oil port 32, and the third oil port 33 to the motor locking element 12, thereby locking the motor locking element 12. That is, the rotation hydraulic control module in this invention only requires operating the rotation handle to achieve hydraulic linkage unlocking of the motor locking element 12.

[0056] like Figure 1 As shown, in an embodiment of the present invention, the rotary start control oil circuit 6 is also connected to the pilot control terminal of the main directional valve 2. When the rotary start control oil circuit 6 generates high pressure, it will also drive the main directional valve 2 to switch.

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

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

[0059] To achieve the above objectives, the present invention also provides a rotary work platform, wherein the rotary work platform includes a hydraulic system according to the above-described rotary work platform. The rotary work platform can be a truck crane, a boom-type aerial work platform, etc.

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

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to 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: The rotary drive unit (1) includes a rotary motor (11) and a motor locking member (12), the motor locking member (12) being used to lock the turntable; The main directional valve (2) is connected to the rotary motor (11) on one side and to the system pressure oil circuit (51) and system return oil circuit (52) on the other side. The main directional valve (2) is provided with a working valve position and a neutral shut-off valve position for guiding the pressure oil to the rotary motor (11). The neutral shut-off valve position connects the forward working oil circuit (111) and the reverse working oil circuit (112) of the rotary motor (11). The working valve position includes a forward drive valve position for guiding the pressure oil to the forward working oil circuit (111) and a reverse drive valve position for guiding the pressure oil to the reverse working oil circuit (112). The unlocking control valve (3) is connected to the 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 guide the hydraulic oil of the pilot pressure oil circuit (53) to the motor locking member (12) to control the turntable to unlock. The main reversing valve (2) is provided with an inlet working chamber (211) for connecting the system pressure oil circuit (51), a return working chamber (212) for connecting the system return oil circuit (52), a first working chamber (213) and a second working chamber (214) for connecting the forward working oil circuit (111) and the reverse working oil circuit (112) respectively. In the neutral shut-off valve position, the return oil working chamber (212) forms a first throttling channel (215) between the first working chamber (213) and the second working chamber (214). In the forward drive valve position, the oil inlet working chamber (211) is connected to the first working chamber (213) through the second connecting channel (216), and the oil inlet working chamber (211) is throttled and connected to the return oil working chamber (212) through the third connecting channel (217). In the reverse drive valve position, the oil inlet working chamber (211) is connected to the second working chamber (214) through the fourth connecting channel (218), and the oil inlet working chamber (211) is throttled and connected to the return oil working chamber (212) through the fifth connecting channel (219).

2. The rotary hydraulic control module according to claim 1, characterized in that, The main directional 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), an oil return working chamber (212), a first working chamber (213) and a second working chamber (214). The valve core (22) is disposed in the valve housing (21) and is used to control the opening of the corresponding working chamber according to the stroke.

3. The rotary hydraulic control module according to claim 2, characterized in that, The cross-sectional size of the first conductive channel (215) gradually decreases from the end away from the oil return working chamber (212) to the end connected to the oil return working chamber (212).

4. The rotary hydraulic control module according to claim 2, characterized in that, The cross-sectional size of the third conductive channel (217) and / or the fifth conductive channel (219) gradually decreases from the end away from the oil return working chamber (212) to the end connected to the oil return working chamber (212).

5. The rotary hydraulic control module according to claim 2, characterized in that, The second conduction channel (216) and the fourth conduction channel (218) are one-way channels formed in the valve core (22). The one-way channel is provided with a one-way control component (23). 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 cut off in the reverse direction.

6. The rotary hydraulic control module according to claim 5, characterized in that, A step (2110) is formed in the one-way channel. The abutting surface of the step (2110) is opposite to the opening on one side of the one-way channel for guiding the oil inlet working chamber (211). The one-way control component (23) includes a blocker (231) disposed in the one-way channel and an elastic member (232) for pushing the blocker (231) toward the abutting surface of the step (2110).

7. The rotary hydraulic control module according to any one of claims 1 to 6, characterized in that, The unlocking control valve (3) has a first oil port (31) and a second oil port (32) located on the inlet and outlet oil 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, and the working oil port is connected to the motor locking member (12). The unlocking control valve (3) has an unlocking valve position and a locking valve position. The unlocking valve position is configured to open the first oil port (31) and the third oil port (33), and the locking valve position is configured to open the second oil port (32) and the third oil port (33).

8. The rotary hydraulic control module according to claim 7, characterized in that, The rotary hydraulic control module also includes a linkage valve (4), which includes a fourth oil port (41) and a fifth oil port (42) located on the inlet and outlet oil 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 respectively connected to the pilot pressure oil circuit (53) and the pilot drain oil circuit (54). The sixth oil port (43) is connected to the second oil port (32). The linkage valve (4) is provided with a linkage unlock valve position and a drain valve position. The linkage unlock valve position is configured to open the fourth oil port (41) and the sixth oil port (43). The drain valve position is configured to open the fifth oil port (42) and the sixth oil port (43). The linkage valve (4) is normally held in the drain valve position. The pilot control end of the linkage valve (4) near the linkage unlock valve position is connected to the rotary start control oil circuit (6).

9. A rotary working machine, characterized in that, It includes a hydraulic system, which includes a rotary hydraulic control module according to any one of claims 1 to 8.

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