Deformable integrated hydraulic actuator

Abstract

The invention relates to the technical field of hydraulic actuators, in particular to a deformable integrated hydraulic actuator. The deformation integrated hydraulic actuator comprises a hydraulic cylinder and a pump, and the hydraulic cylinder is flexibly connected with the pump; the hydraulic cylinder comprises a cylinder barrel and a piston, the cylinder barrel is provided with a piston cavity, the piston is slidably installed in the piston cavity, and the piston cavity is provided with a first cavity and a second cavity which are located on the two sides of the piston respectively; the pump is provided with a liquid inlet, a first liquid outlet and a second liquid outlet, the liquid inlet is communicated with the liquid storage cavity, the first liquid outlet is communicated with the first cavity through a first flexible liquid conveying pipe, and the second liquid outlet is communicated with the second cavity through a second flexible liquid conveying pipe. The variable integrated hydraulic actuator provided by the invention has relatively high integrity and compactness, can realize plug and play, and is relatively high in convenience; in addition, form transformation can be achieved so as to adapt to different installation spaces, the requirement for the installation spaces can be lowered, and the adaptability to use scenes is high.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic actuators, and in particular to a deformable integrated hydraulic actuator. Background Art

[0002] The integrated hydraulic actuator has a compact structure, strong integrity, occupies a small space, is easy to transport and install, and is widely used in various fields.

[0003] However, the components in the existing integrated hydraulic actuators are all rigidly connected and have a fixed shape, which results in limited installation space, high requirements, and poor adaptability to usage scenarios. Summary of the invention

[0004] The object of the present invention is to provide a deformable integrated hydraulic actuator to alleviate the technical problem of limited installation space of the integrated hydraulic actuator in the prior art.

[0005] The deformable integrated hydraulic actuator provided by the present invention comprises a hydraulic cylinder and a pump, wherein the hydraulic cylinder is flexibly connected to the pump.

[0006] The hydraulic cylinder comprises a cylinder barrel and a piston. The cylinder barrel has a piston cavity. The piston is slidably installed in the piston cavity. The piston cavity has a first chamber and a second chamber respectively located on two sides of the piston.

[0007] The pump has a liquid inlet, a first liquid outlet and a second liquid outlet. The liquid inlet is connected to the liquid storage cavity, the first liquid outlet is connected to the first chamber through a first flexible infusion tube, and the second liquid outlet is connected to the second chamber through a second flexible infusion tube.

[0008] Preferably, as an implementable embodiment, the liquid storage chamber is opened in the cylinder, and the liquid inlet is connected to the liquid storage chamber through a third flexible infusion tube.

[0009] Preferably, as an implementable embodiment, the first flexible infusion tube, the second flexible infusion tube and the third flexible infusion tube are all retractable hoses.

[0010] Preferably, as an implementable embodiment, the hydraulic cylinder is hinged to the pump.

[0011] Preferably, as an implementable embodiment, the hydraulic cylinder also includes a piston rod, the piston rod is fixedly connected to the piston, the piston rod extends from the barrel mouth of the cylinder, and a hydraulic cylinder connecting block is fixedly connected to the end of the cylinder barrel facing away from the barrel mouth; the hydraulic cylinder connecting block is hinged to the pump by a hinge.

[0012] Preferably, as an implementable embodiment, the first chamber is located on the side of the piston close to the barrel mouth of the cylinder, and the cylinder also has a liquid return channel, which is connected to the first chamber, and the liquid return channel, the liquid storage chamber and the second chamber all pass through the end of the cylinder facing away from the barrel mouth.

[0013] The hydraulic cylinder connecting block is provided with a liquid outlet channel, a first liquid inlet channel and a second liquid inlet channel; one end of the liquid outlet channel and the liquid inlet are respectively sealedly connected to the two ends of the third flexible infusion tube, and the other end of the liquid outlet channel is sealedly connected to the liquid storage chamber; one end of the first liquid inlet channel and the first liquid outlet are respectively sealedly connected to the two ends of the first flexible infusion tube, and the other end of the first liquid inlet channel is sealedly connected to the return liquid channel; one end of the second liquid inlet channel and the second liquid outlet are respectively sealedly connected to the two ends of the second flexible infusion tube, and the other end of the second liquid inlet channel is sealedly connected to the second chamber.

[0014] Preferably, as an implementable embodiment, the hydraulic cylinder is connected to the pump via a snap-fit ​​structure;

[0015] Alternatively, the hydraulic cylinder is connected to the pump via a connecting rod mechanism.

[0016] Preferably, as an implementation method, the pump includes a pump housing and two mutually meshing gears, the pump housing is provided with a accommodating cavity, and the gear is pivotally connected to the accommodating cavity; the liquid inlet, the first liquid outlet and the second liquid outlet are all provided in the pump housing and are respectively communicated with the accommodating cavity.

[0017] Preferably, as an implementable embodiment, the deformable integrated hydraulic actuator further comprises a motor, the motor is mounted on the pump housing, and the output shaft of the motor is coaxially fixedly connected to one of the gears.

[0018] Preferably, as an implementable embodiment, a hydraulic valve is installed in the pump housing, and the first liquid outlet and the second liquid outlet are both connected to the accommodating chamber through the hydraulic valve.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When working, the pump can be driven to rotate forward (or reverse), so that the liquid in the liquid storage chamber is pumped into the liquid inlet and pumped out from the first liquid outlet to the first flexible infusion tube, and the first flexible infusion tube is used to introduce the liquid into the first chamber of the cylinder, and the liquid entering the first chamber can push the piston in the piston chamber to move forward (or reverse); the pump can also be driven to reverse (or rotate forward), so that the liquid in the liquid storage chamber is pumped into the liquid inlet and pumped out from the second liquid outlet to the second flexible infusion tube, and the second flexible infusion tube is used to introduce the liquid into the second chamber of the cylinder, and the liquid entering the second chamber can push the piston in the piston chamber to move reversely (or forward).

[0021] It should be noted that, since the hydraulic cylinder and the pump are connected by a flexible connection, the hydraulic cylinder and the pump can change their relative posture according to the installation space, thereby realizing the morphological transformation of the deformable integrated hydraulic actuator; in addition, since the first flexible infusion tube and the second flexible infusion tube connected between the two are both flexible structures, the first flexible infusion tube and the second flexible infusion tube can adaptively deform following the change in the relative posture between the hydraulic cylinder and the pump, and will not hinder the morphological transformation of the deformable integrated hydraulic actuator.

[0022] Therefore, the variable integrated hydraulic actuator provided by the present invention not only has high integrity and compactness, can be plug-and-play, and is highly convenient; it can also achieve shape transformation to adapt to different installation spaces, which can reduce the requirements for installation space and has strong adaptability to usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a deformable integrated hydraulic actuator provided in an embodiment of the present invention;

[0025] Figure 2 A schematic cross-sectional view of a deformable integrated hydraulic actuator provided in an embodiment of the present invention;

[0026] Figure 3 A schematic cross-sectional structural diagram of a deformable integrated hydraulic actuator from another perspective provided by an embodiment of the present invention;

[0027] Figure 4 A partial structural schematic diagram of a deformable integrated hydraulic actuator provided in an embodiment of the present invention;

[0028] Figure 5 A schematic cross-sectional view of a partial structure of a deformable integrated hydraulic actuator provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 100-hydraulic cylinder; 110-cylinder barrel; 111-first chamber; 112-second chamber; 113-liquid storage chamber; 114-liquid return channel; 120-piston; 130-piston rod; 140-hydraulic cylinder connecting block; 141-liquid outlet channel; 142-first liquid inlet channel; 143-second liquid inlet channel;

[0031] 200-pump; 210-pump housing; 211-liquid inlet; 212-first liquid outlet; 213-second liquid outlet; 214-accommodating chamber; 220-gear;

[0032] 300-a first flexible infusion tube;

[0033] 400- second flexible infusion tube;

[0034] 500- third flexible infusion tube;

[0035] 600-hinge;

[0036] 700-motor; 710-motor connection block. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0039] See also Figure 1-Figure 5 The present embodiment provides a deformable integrated hydraulic actuator, including a hydraulic cylinder 100 and a pump 200, wherein the hydraulic cylinder 100 is flexibly connected to the pump 200; the hydraulic cylinder 100 includes a cylinder barrel 110 and a piston 120, wherein the cylinder barrel 110 has a piston cavity, wherein the piston 120 is slidably installed in the piston cavity, wherein the piston cavity has a first chamber 111 and a second chamber 112 respectively located on both sides of the piston 120; the pump 200 has a liquid inlet 211, a first liquid outlet 212 and a second liquid outlet 213, wherein the liquid inlet 211 is connected to the liquid storage cavity 113, the first liquid outlet 212 is connected to the first chamber 111 through a first flexible liquid infusion tube 300, and the second liquid outlet 213 is connected to the second chamber 112 through a second flexible liquid infusion tube 400.

[0040] During operation, the pump 200 can be driven to rotate forward (or reverse), so that the liquid in the liquid storage chamber 113 is pumped into the liquid inlet 211 and pumped out from the first liquid outlet 212 to the first flexible infusion tube 300, and the first flexible infusion tube 300 is used to introduce the liquid into the first chamber 111 of the cylinder 110, and the liquid entering the first chamber 111 can push the piston 120 in the piston chamber to move forward (or reverse); the pump 200 can also be driven to reverse (or rotate forward), so that the liquid in the liquid storage chamber 113 is pumped into the liquid inlet 211 and pumped out from the second liquid outlet 213 to the second flexible infusion tube 400, and the second flexible infusion tube 400 is used to introduce the liquid into the second chamber 112 of the cylinder 110, and the liquid entering the second chamber 112 can push the piston 120 in the piston chamber to move reversely (or forward).

[0041] It should be noted that, since the hydraulic cylinder 100 and the pump 200 are connected by a flexible connection, the hydraulic cylinder 100 and the pump 200 can change their relative posture according to the installation space, thereby realizing the morphological transformation of the deformable integrated hydraulic actuator; in addition, since the first flexible infusion tube 300 and the second flexible infusion tube 400 connected therebetween are both flexible structures, the first flexible infusion tube 300 and the second flexible infusion tube 400 can adaptively deform following the change in the relative posture between the hydraulic cylinder 100 and the pump 200, and will not hinder the morphological transformation of the deformable integrated hydraulic actuator.

[0042] Therefore, the variable integrated hydraulic actuator provided in this embodiment not only has high integrity and compactness, can be plug-and-play, and is highly convenient; it can also achieve shape transformation to adapt to different installation spaces, which can reduce the requirements for installation space and has strong adaptability to usage scenarios.

[0043] It should be noted that the hydraulic cylinder 100 and the pump 200 may be flexibly connected by only using flexible infusion tubes (including a first flexible infusion tube 300 and a second flexible infusion tube 400 ), or other connection structures may be added between the hydraulic cylinder 100 and the pump 200 .

[0044] Preferably, the liquid storage chamber 113 can be opened on the cylinder 110, which is equivalent to integrating the liquid storage tank into the hydraulic cylinder 100. In this way, there is no need for an external liquid storage tank, which can improve the compactness of the overall structure and reduce the space and weight occupied by the actuator as a whole. On this basis, the liquid inlet 211 of the pump 200 is connected to the liquid storage chamber 113 through the third flexible infusion tube 500 to achieve the connection between the liquid storage chamber 113 and the liquid inlet 211 of the pump 200, and can meet the flexible connection requirements between the hydraulic cylinder 100 and the pump 200, allowing the hydraulic cylinder 100 and the pump 200 to change their relative posture.

[0045] Furthermore, the first flexible infusion tube 300 , the second flexible infusion tube 400 and the third flexible infusion tube 500 can all be configured as retractable hoses, which can not only meet the flexible deformation requirements but also ensure good flow smoothness after being shortened.

[0046] As an implementable embodiment, the hydraulic cylinder 100 and the pump 200 can be connected in a hinged manner, which can not only realize the transformation of the actuator shape by rotating the hydraulic cylinder 100 or the pump 200 and adjusting the angle between the hydraulic cylinder 100 and the pump 200; but also has a certain rigidity, which can improve the reliability of the overall structure and reduce the load borne by the flexible infusion tube, so as to reduce the strength requirement of the flexible infusion tube and save costs.

[0047] Specifically, a piston rod 130 is provided in the specific structure of the hydraulic cylinder 100, the piston rod 130 is fixedly connected to the piston 120, the piston rod 130 is extended from the barrel of the cylinder 110, and a hydraulic cylinder connecting block 140 is fixedly connected to the end of the cylinder 110 facing away from the barrel; the hydraulic cylinder connecting block 140 is hinged to the pump 200 through a hinge 600, which rotates smoothly and is easy to process.

[0048] Furthermore, the first chamber 111 is arranged on the side of the piston 120 close to the barrel mouth of the cylinder 110, and a liquid return channel 114 is arranged on the cylinder 110, and the liquid return channel 114 is connected with the first chamber 111, and the liquid return channel 114, the liquid storage chamber 113 and the second chamber 112 all penetrate the end of the cylinder 110 that is opposite to the barrel mouth. Based on this structure, a liquid outlet channel 141, a first liquid inlet channel 142 and a second liquid inlet channel 143 are provided on the hydraulic cylinder connection block 140, and one end of the liquid outlet channel 141 and the liquid inlet of the pump 200 are respectively sealed and connected with the two ends of the third flexible infusion tube 500, and the other end of the liquid outlet channel 141 is sealed and connected with the liquid storage chamber 113, so as to realize the indirect communication between the liquid inlet of the pump 200 and the liquid storage chamber 113, so that the pump 200 can smoothly suck the liquid in the liquid storage chamber 113 from the liquid inlet 211; and the sealing performance of the channel between the two can be ensured to reduce the risk of leakage. One end of the first liquid inlet channel 142 and the first liquid outlet 212 of the pump 200 are sealed and connected to the two ends of the first flexible infusion tube 300 respectively, and the other end of the first liquid inlet channel 142 is sealed and connected to the return liquid channel 114 to achieve indirect connection between the first liquid outlet 212 of the pump 200 and the first chamber 111, so that the liquid pumped out of the first liquid outlet 212 of the pump 200 can smoothly enter the first chamber 111 of the cylinder 110 to smoothly pull back the piston rod 130; and the sealing performance of the channel between the first liquid outlet 212 of the pump 200 and the first chamber 111 can be guaranteed to reduce the risk of leakage. One end of the second liquid inlet channel 143 and the second liquid outlet 213 of the pump 200 are sealed and connected to the two ends of the second flexible infusion tube 400 respectively, and the other end of the second liquid inlet channel 143 is sealed and connected to the second chamber 112 to achieve indirect connection between the second liquid outlet 213 of the pump 200 and the second chamber 112, so that the liquid pumped out of the second liquid outlet 213 of the pump 200 can smoothly enter the second chamber 112 of the cylinder 110 to smoothly push out the piston rod 130; and the sealing performance of the channel between the second liquid outlet 213 of the pump 200 and the second chamber 112 can be guaranteed to reduce the risk of leakage.

[0049] Specifically, the hydraulic cylinder connection block 140 and the cylinder barrel 110 may be connected via a threaded connection piece, which can ensure the connection reliability between the two and realize the detachment of the hydraulic cylinder connection block 140 and the cylinder barrel 110 .

[0050] As another possible implementation method, a snap-fit ​​structure is provided between the hydraulic cylinder 100 and the pump 200, and the snap-fit ​​structure is utilized to realize locking and unlocking between the hydraulic cylinder 100 and the pump 200, so that the relative position of the hydraulic cylinder 100 and the pump 200 can be adjusted.

[0051] As another possible implementation method, a connecting rod mechanism is provided between the hydraulic cylinder 100 and the pump 200 , and the relative position of the hydraulic cylinder 100 and the pump 200 is adjusted by using the connecting rod mechanism.

[0052] In the specific structure of the pump 200, a pump housing 210 and two mutually meshing gears 220 may be provided, a receiving chamber 214 may be opened on the pump housing 210, the gear 220 may be installed in the receiving chamber 214, and the gear 220 may be pivotally connected to the pump housing 210 so that the gear 220 may rotate freely in the receiving chamber 214; a liquid inlet 211, a first liquid outlet 212, and a second liquid outlet 213 may be opened on the pump housing 210, and the liquid inlet 211, the first liquid outlet 212, and the second liquid outlet 213 may be communicated with the receiving chamber 214, respectively. One of the two gears 220 is a driving gear, and the other is a driven gear. When the driving gear rotates forward (or reversely), the liquid in the liquid storage chamber 113 can be sucked into the accommodating chamber 214 from the liquid inlet 211, and pumped to the first flexible liquid infusion tube 300 from the first liquid outlet 212, and enters the first chamber 111 of the cylinder 110 through the first flexible liquid infusion tube 300, pushing the piston 120 in the piston chamber to move forward (or reversely); when the driving gear rotates reversely (or forward), the liquid in the liquid storage chamber 113 can be sucked into the accommodating chamber 214 from the liquid inlet 211, and pumped to the second flexible liquid infusion tube 400 from the second liquid outlet 213, and enters the second chamber 112 of the cylinder 110 through the second flexible liquid infusion tube 400, pushing the piston 120 in the piston chamber to move reversely (or forward). The pump 200 adopts this integration mode, and the normal operation of the pump 200 can be realized by only connecting a driver for driving the driving gear to the pump 200, thereby reducing the risk of liquid leakage and enhancing the sealing performance.

[0053] In this embodiment, a motor 700 can be provided as a driver, the motor 700 is mounted on the pump housing 210, and the output shaft of the motor 700 is coaxially fixedly connected to one of the gears 220 (driving gear). Thus, starting the motor 700 can drive the actuator to work, which is convenient to use.

[0054] The motor 700 can be mounted on the pump housing 210 via the motor connecting block 710 for ease of processing.

[0055] A hydraulic valve may be installed in the pump housing 210 to connect the first liquid outlet 212 and the second liquid outlet 213 to the accommodating chamber 214 through the hydraulic valve, so as to realize flow control by using the hydraulic valve, so as to accurately control the extension length and movement direction of the piston rod 130 .

[0056] The above-mentioned liquid may be oil or other liquids.

[0057] In summary, the embodiment of the present invention discloses a deformable integrated hydraulic actuator, which overcomes many technical defects of traditional integrated hydraulic actuators, such as limited installation space. The deformable integrated hydraulic actuator provided by the embodiment of the present invention not only has high integrity and compactness, can be plug-and-play, and is highly convenient; it can also achieve shape transformation to adapt to different installation spaces, which can reduce the requirements for installation space and has strong adaptability to usage scenarios.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deformable integrated hydraulic actuator, characterized in that: It comprises a hydraulic cylinder (100) and a pump (200), wherein the hydraulic cylinder (100) is flexibly connected to the pump (200); The hydraulic cylinder (100) comprises a cylinder barrel (110) and a piston (120), wherein the cylinder barrel (110) has a piston cavity, wherein the piston (120) is slidably mounted in the piston cavity, and wherein the piston cavity has a first chamber (111) and a second chamber (112) respectively located on both sides of the piston (120); The pump (200) comprises a liquid inlet (211), a first liquid outlet (212) and a second liquid outlet (213); the liquid inlet (211) is connected to the liquid storage chamber (113); the first liquid outlet (212) is connected to the first chamber (111) via a first flexible liquid infusion tube (300); and the second liquid outlet (213) is connected to the second chamber (112) via a second flexible liquid infusion tube (400).

2. The deformable integrated hydraulic actuator according to claim 1, characterized in that: The liquid storage chamber (113) is opened in the cylinder (110), and the liquid inlet (211) is connected to the liquid storage chamber (113) via a third flexible liquid infusion tube (500).

3. The deformable integrated hydraulic actuator according to claim 2, characterized in that: The first flexible infusion tube (300), the second flexible infusion tube (400) and the third flexible infusion tube (500) are all retractable hoses.

4. The deformable integrated hydraulic actuator according to claim 2, characterized in that: The hydraulic cylinder (100) is hinged to the pump (200).

5. The deformable integrated hydraulic actuator according to claim 4, characterized in that: The hydraulic cylinder (100) further comprises a piston rod (130), wherein the piston rod (130) is fixedly connected to the piston (120), and the piston rod (130) extends out from the barrel opening of the cylinder barrel (110); a hydraulic cylinder connecting block (140) is fixedly connected to the end of the cylinder barrel (110) facing away from the barrel opening; and the hydraulic cylinder connecting block (140) is hingedly connected to the pump (200) via a hinge (600).

6. The deformable integrated hydraulic actuator according to claim 5, characterized in that: The first chamber (111) is located on a side of the piston (120) close to the barrel opening of the cylinder (110); the cylinder (110) further comprises a liquid return channel (114), the liquid return channel (114) is communicated with the first chamber (111); the liquid return channel (114), the liquid storage chamber (113) and the second chamber (112) all penetrate the end of the cylinder (110) facing away from the barrel opening; The hydraulic cylinder connection block (140) is provided with a liquid outlet channel (141), a first liquid inlet channel (142) and a second liquid inlet channel (143); one end of the liquid outlet channel (141) and the liquid inlet port (211) are respectively sealed and connected to the two ends of the third flexible liquid infusion tube (500), and the other end of the liquid outlet channel (141) is sealed and connected to the liquid storage chamber (113); one end of the first liquid inlet channel (142) and the first liquid outlet port (212) are respectively sealed and connected to the two ends of the first flexible liquid infusion tube (300), and the other end of the first liquid inlet channel (142) is sealed and connected to the liquid return channel (114); one end of the second liquid inlet channel (143) and the second liquid outlet port (213) are respectively sealed and connected to the two ends of the second flexible liquid infusion tube (400), and the other end of the second liquid inlet channel (143) is sealed and connected to the second chamber (112).

7. The deformable integrated hydraulic actuator according to claim 1, characterized in that: The hydraulic cylinder (100) is connected to the pump (200) via a snap-fit ​​structure; Alternatively, the hydraulic cylinder (100) and the pump (200) are connected via a connecting rod mechanism.

8. The deformable integrated hydraulic actuator according to any one of claims 1 to 7, characterized in that: The pump (200) comprises a pump housing (210) and two mutually meshing gears (220); the pump housing (210) is provided with a receiving cavity (214), and the gear (220) is pivotally connected to the receiving cavity (214); the liquid inlet (211), the first liquid outlet (212) and the second liquid outlet (213) are all provided in the pump housing (210), and are respectively communicated with the receiving cavity (214).

9. The deformable integrated hydraulic actuator according to claim 8, characterized in that: The deformable integrated hydraulic actuator further comprises a motor (700), wherein the motor (700) is mounted on the pump housing (210), and an output shaft of the motor (700) is coaxially fixedly connected to one of the gears (220).

10. The deformable integrated hydraulic actuator according to claim 8, characterized in that: A hydraulic valve is installed in the pump housing (210), and the first liquid outlet (212) and the second liquid outlet (213) are both connected to the accommodating chamber (214) through the hydraulic valve.

Images