High-sealing-performance hydraulic actuator

Abstract

The utility model relates to the technical field of hydraulic actuators, in particular to a high-sealing-performance hydraulic actuator and a cylinder barrel, the hydraulic actuator comprises end covers installed at the two ends of the cylinder barrel, and the two end covers are connected through a plurality of screws and bolts; the hydraulic rod is arranged in the cylinder barrel, and a hydraulic piston is arranged at one end of the hydraulic rod; the sealing connection mechanism is arranged between the cylinder barrel and the end cover; according to the hydraulic actuator, the connection sealing performance and stability between the cylinder barrel and the end cover are improved, the lock rod and the lock plate are placed in the penetrating groove and the lock groove, the cylinder barrel and the end cover can be connected in a limited mode, stroke impact of a hydraulic piston is effectively avoided, and the cylinder barrel and the end cover can be connected in a limited mode. Therefore, the problem that the sealing performance of the cylinder barrel and the end cover is affected due to the fact that the cylinder barrel and the end cover are loosened is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic actuator technical field, concretely is a kind of high sealing hydraulic actuator. BACKGROUND

[0002] Hydraulic actuator, as a kind of device that converts hydraulic energy into mechanical energy, has a wide range of applications in industrial automation, aerospace, ocean engineering, engineering machinery, automobile industry and energy exploitation etc., and sealing is one of the key indicators of the performance of hydraulic actuator, which is directly related to the service life of actuator, work efficiency and system safety, if sealing performance is poor, it is easy to cause liquid leakage, not only can reduce the power output and control accuracy of actuator, but also can cause system failure, even cause safety accident.

[0003] The traditional hydraulic actuator is combined and installed between end cover and cylinder barrel by screw bolt, however, in the process of long-term reciprocating mechanical movement, the piston continuously impacts the end cover, which can easily cause the loosening of screw bolt, resulting in the problem of hydraulic oil leakage of hydraulic actuator, and affecting the sealing of hydraulic actuator. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of high sealing hydraulic actuator to solve the problem of existing hydraulic actuator in the process of long-term reciprocating mechanical movement, piston continuously impacts the end cover, which can easily cause the loosening of screw bolt, resulting in the problem of hydraulic oil leakage of hydraulic actuator, in view of the technical problems existing in the prior art.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A kind of high sealing hydraulic actuator is provided, comprising cylinder barrel, the hydraulic actuator comprises:

[0007] End cover is installed at both ends of the cylinder barrel, and the two end covers are connected by a plurality of screw bolts;

[0008] Hydraulic rod is arranged in the cylinder barrel, and the hydraulic rod is provided with hydraulic piston at one end;

[0009] Sealing connection mechanism is arranged between the cylinder barrel and the end cover;And

[0010] Sealing assembly is arranged between the end cover and the hydraulic rod.

[0011] Further, the sealing connection mechanism comprises:

[0012] Connecting block is fixedly connected to the middle part of the cylinder barrel;

[0013] Protruding portion is arranged on the two side walls of the end cover;

[0014] The through slot is internally movably provided with a lock rod, and the lock rod is fixedly connected with a lock plate at both ends thereof;

[0015] The lock slot is movably connected with the lock plate and the lock rod.

[0016] The limiting assembly is arranged on the side wall of the connecting block.

[0017] Further, the limiting assembly comprises:

[0018] The lock block is movably arranged in the through slot, and the side walls of the lock block are protruded; and the lock block is clamped with the through slot.

[0019] The clamping frame is movably arranged on the side wall of the connecting block, and the clamping frame is clamped with the connecting block; and the two lock blocks are fixedly connected with the clamping frame.

[0020] The positioning bolt is arranged in the middle of the clamping frame, and the positioning bolt is threadedly connected with the connecting block.

[0021] Further, the sealing assembly comprises:

[0022] Two sealing grooves are arranged on the hydraulic piston, and the sealing grooves are internally provided with a piston sealing ring.

[0023] Two rod sealing rings are arranged on the inner wall of the end cover, and the side walls of the two rod sealing rings are in contact with the hydraulic rod.

[0024] A dustproof ring is arranged on the side wall of the hydraulic piston.

[0025] Further, the side wall of the end cover is bolted with a blocking ring, and the inner wall of the blocking ring is in contact with the dustproof ring.

[0026] Further, the side wall of the connecting block is provided with a limiting strip, and the side wall of the clamping frame is in contact with the limiting strip.

[0027] Further, the inside of the lock slot is provided with a dustproof block, and the side wall of the dustproof block is in contact with the lock rod and the lock plate.

[0028] Further, the both ends of the cylinder barrel are provided with a ring groove, and the ring groove is internally provided with a gasket.

[0029] The utility model discloses the following beneficial effects:

[0030] The utility model discloses a improve the hydraulic actuator of the connecting sealing property and stability between cylinder and end cover, make between cylinder and two end covers can carry out the stable close connection, make cylinder and two end covers realize high sealing property connection, through the lock bar and lock piece put into the slot and lock groove, can carry out the location connection between cylinder and end cover, effectively avoid due to the stroke of hydraulic piston and hit, lead to the loosening of screw bolt, and then avoid the loosening between cylinder and end cover, influence the problem of the sealing property of cylinder and end cover. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the whole structure schematic diagram of the utility model;

[0032] Figure 2 It is the three -dimensional section schematic diagram of the utility model;

[0033] Figure 3 It is the split structure view of sealing connection mechanism in the utility model;

[0034] Figure 4 It is the structure view of sealing connection mechanism in the utility model;

[0035] Figure 5 It is the structure view of sealing assembly in the utility model;

[0036] Figure 6 It is the structure view of ring groove and washer in the utility model;

[0037] In the drawing, the component list represented by each sign is as follows:

[0038] Cylinder;2, end cover;3, screw bolt;4, hydraulic rod;5, hydraulic piston;

[0039] 6, sealing connection mechanism;61, connecting block;62, protruding portion;63, slot;64, lock bar;65, lock piece;66, lock groove;67, limiting component;671, lock block;672, clamping frame;673, positioning bolt;

[0040] 7, sealing assembly;71, sealing groove;72, piston sealing ring;73, rod sealing ring;74, dustproof ring;

[0041] 8, baffle ring;9, limiting strip;10, dustproof block;11, ring groove;12, washer. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. The examples of the examples are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The examples described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0043] In the description of the utility model, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as limiting the utility model.

[0044] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0045] In the description of the utility model, it should be noted that unless otherwise specifically specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature therebetween. Moreover, the first feature "on", "above" and "on top of" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "underneath" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0047] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0048] The present application provides the following preferred embodiments:

[0049] Embodiment one: reference Figures 1 to 6 As shown in the figure, a high-sealing hydraulic actuator, comprising a cylinder 1, the hydraulic actuator comprises:

[0050] The end cover 2 is installed at both ends of the cylinder 1, and the two end covers 2 are connected by a plurality of screw bolts 3;

[0051] The hydraulic rod 4 is arranged in the cylinder 1, and one end of the hydraulic rod 4 is provided with a hydraulic piston 5;

[0052] The sealing connection mechanism 6 is arranged between the cylinder 1 and the end cover 2; and

[0053] The sealing assembly 7 is arranged between the end cover 2 and the hydraulic rod 4.

[0054] In use, the hydraulic actuator is mainly composed of cylinder 1, end cover 2, hydraulic rod 4, sealing connection mechanism 6 and sealing assembly 7, etc. In operation, first, high-pressure hydraulic oil is injected into the cylinder 1 through an external hydraulic system, the hydraulic oil acts on the hydraulic piston 5, and pushes the hydraulic rod 4 to move linearly, thereby completing the predetermined mechanical action. The screw bolt 3 tightly connects the cylinder 1 and the two end covers 2. In order to avoid loosening of the screw bolt 3 due to the stroke of the piston, the sealing connection mechanism 6 limits the connection between the two end covers 2 and the cylinder 1, so that the cylinder 1 and the end cover 2 are stably connected, and the cylinder 1 and the end cover 2 are tightly connected. The sealing assembly 7 is arranged to realize the sealing connection between the hydraulic piston 5 and the cylinder 1, and the sealing connection between the hydraulic rod 4 and the end cover 2, thereby improving the overall sealing effect.

[0055] Embodiment two: refer to Figure 3 and Figure 4 As shown, the sealing connection mechanism 6 comprises:

[0056] The connecting block 61 is fixedly connected to the middle part of the cylinder 1;

[0057] The protruding part 62 is arranged on the two side walls of the end cover 2;

[0058] The through slot 63 is opened on the two side walls of the connecting block 61, the lock rod 64 is movably arranged in the through slot 63, and the lock piece 65 is fixedly connected to the two ends of the lock rod 64;

[0059] The lock slot 66 is opened on the side wall of the protruding part 62, and the lock slot 66 is movably connected with the lock piece 65 and the lock rod 64; and

[0060] The limiting assembly 67 is arranged on the side wall of the connecting block 61.

[0061] In use, after the end cover 2 is connected with the cylinder 1, the lock rod 64 is placed in the through slot 63, at this time the lock piece 65 of the lock rod 64 enters the lock slot 66, this process ensures the tight connection between the end cover 2 and the cylinder 1, and the cooperation of the lock piece 65 and the lock rod 64 also provides additional locking force to prevent loosening due to vibration or impact. The limiting assembly 67 limits the lock rod 64 to avoid displacement of the lock rod 64. In this way, during the working process, when the hydraulic oil is injected into the cylinder 1 and pushes the hydraulic rod 4 to move, the sealing connection mechanism 6 can ensure the sealing between the cylinder 1 and the end cover 2, prevent the leakage of hydraulic oil, and the cooperation of the lock rod 64, the lock piece 65 and the limiting assembly 67 makes the whole connection mechanism more stable and reliable.

[0062] Embodiment three: refer to Figure 4 As shown, the limiting assembly 67 comprises:

[0063] The lock block 671 is movably arranged in the through slot 63, and the two side walls of the lock block 671 are provided in a protruding manner, and the lock block 671 is in clamping connection with the through slot 63;

[0064] The clamping frame 672 is movably arranged on the side wall of the connecting block 61, and the clamping frame 672 is in clamping connection with the connecting block 61, and the two lock blocks 671 are fixedly connected with the clamping frame 672; and

[0065] The positioning bolt 673 is arranged in the middle of the clamping frame 672, and the positioning bolt 673 is in threaded connection with the connecting block 61.

[0066] In use, after the lock rod 64 is in locking connection between the cylinder barrel 1 and the end cover 2, the clamping frame 672 is slidably arranged on the connecting block 61, at this time, the clamping frame 672 drives the lock block 671 to enter the through slot 63, and since the two side walls of the lock block 671 are provided in a protruding manner, the lock block 671 is limited and supported inside the through slot 63, and then the clamping frame 672 is locked with the connecting block 61 through the positioning bolt 673, and in this process, the lock rod 64 inside the through slot 63 can be limited and locked, so as to avoid the problem of shaking or displacement of the lock rod 64.

[0067] Embodiment four: referring to Figure 5 As shown in the figure, the sealing assembly 7 comprises:

[0068] Two sealing grooves 71 are opened on the hydraulic piston 5, and the inside of the sealing groove 71 is provided with a piston sealing ring 72;

[0069] Two rod sealing rings 73 are arranged on the inner wall of the end cover 2, and the side wall of the two rod sealing rings 73 is in contact with the hydraulic rod 4; and

[0070] A dustproof ring 74 is arranged on the side wall of the hydraulic piston 5.

[0071] In use, when the hydraulic piston 5 reciprocates in the cylinder barrel 1, the piston sealing ring 72 can tightly adhere to the inner wall of the cylinder barrel 1, effectively preventing the leakage of hydraulic oil, not only improving the sealing performance, but also reducing the friction between the hydraulic oil and the inner wall of the cylinder barrel 1, prolonging the service life of the actuator, when the hydraulic rod 4 moves linearly in the cylinder barrel 1, the rod sealing ring 73 can prevent the leakage of hydraulic oil from the gap between the hydraulic rod 4 and the end cover 2, at the same time, the rod sealing ring 73 also has a certain elasticity, which can adapt to the slight deviation of the hydraulic rod 4 in the movement process, ensuring the continuous stability of the sealing effect, and the dustproof ring 74 is arranged on the side wall of the hydraulic piston 5, which is mainly used to prevent external dust, moisture and other pollutants from invading the inside of the hydraulic actuator, in the working process, when the hydraulic oil is injected into the cylinder barrel 1 through the external system, the piston sealing ring 72 and the rod sealing ring 73 jointly act to ensure that the hydraulic oil forms a closed circulation between the cylinder barrel 1 and the hydraulic rod 4, at the same time, the dustproof ring 74 effectively prevents the invasion of external pollutants, and maintains the internal environment of the hydraulic actuator.

[0072] Embodiment five: refer to Figure 6 As shown, the side wall of the end cover 2 is provided with a blocking ring 8, and the inner wall of the blocking ring 8 is in contact with the dustproof ring 74.

[0073] In use, the blocking ring 8 can shield and protect the dustproof ring 74, preventing the dustproof ring 74 from falling off or being damaged by external force.

[0074] Embodiment six: refer to Figure 4 As shown, the side wall of the connecting block 61 is provided with a limiting strip 9, and the side wall of the clamping frame 672 is in contact with the limiting strip 9.

[0075] In use, the limiting strip 9 can limit the movement range of the clamping frame 672 on the connecting block 61, so that the positioning bolt 673 can quickly connect the clamping frame 672 and the connecting block 61.

[0076] Embodiment seven: refer to Figure 3 As shown, the dustproof plug 10 is arranged in the lock slot 66, and the side wall of the dustproof plug 10 is in contact with the lock rod 64 and the lock plate 65.

[0077] In use, the dustproof plug 10 can prevent external dust and impurities from entering the inside of the lock slot 66.

[0078] Embodiment eight: refer to Figure 6 As shown, the cylinder 1 is provided with a ring groove 11 at both ends, and the ring groove 11 is provided with a gasket 12.

[0079] In use, the ring groove 11 and the gasket 12 can improve the sealing performance between the two ends of the cylinder 1 and the end cover 2.

[0080] Working principle: the application in use, first screw bolt 3 the role of the cylinder 1 and two end covers 2 between the tight connection, when the end cover 2 and cylinder 1 between the connection, the lock bar 64 into the slot 63, the lock piece 65 of lock bar 64 enters the lock slot 66 at this time, the process ensures the tight connection between end cover 2 and cylinder 1, while the lock piece 65 and lock bar 64 also provide additional locking force, prevent loose due to vibration or impact, then the card frame 672 is installed in the connecting block 61, the card frame 672 drives lock block 671 into the slot 63 at this time, because the two sides of lock block 671 are convex, realize the limit support of lock block 671 in the slot 63, then through the positioning bolt 673 makes the card frame 672 and connecting block 61 between locking, this process can realize the locking of the slot 63 inside the lock bar 64, avoid the problem of lock bar 64 appears to shift or displacement, so in the working process, when the hydraulic oil is injected into the cylinder 1 and push the hydraulic rod 4 movement, sealing connection mechanism 6 can ensure the sealing between cylinder 1 and end cover 2, prevent hydraulic oil leakage, while the piston seal ring 72 and rod seal ring 73 together, ensure that the hydraulic oil forms a closed cycle between the cylinder 1 and hydraulic rod 4, at the same time, dustproof ring 74 effectively blocks the invasion of external pollutants, maintain the internal environment of hydraulic actuator.

[0081] The beneficial effects of the utility model are embodied in the above-mentioned preferred embodiments of the utility model, and are not used to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-sealing hydraulic actuator comprising a cylinder barrel (1), characterized in that, The hydraulic actuator comprises: End covers (2) mounted on both ends of the cylinder barrel (1), and connected by a plurality of screw bolts (3) between the two end covers (2); A hydraulic rod (4) arranged inside the cylinder barrel (1), and provided with a hydraulic piston (5) at one end of the hydraulic rod (4); A sealing connection mechanism (6) arranged between the cylinder barrel (1) and the end cover (2); and A sealing assembly (7) arranged between the end cover (2) and the hydraulic rod (4); The sealing connection mechanism (6) comprises: A connecting block (61) fixedly connected to the middle part of the cylinder barrel (1); A protruding part (62) arranged on the two side walls of the end cover (2); A through slot (63) opened on the two side walls of the connecting block (61), and movably provided with a lock rod (64) inside the through slot (63), and the two ends of the lock rod (64) are fixedly connected with lock plates (65); A lock slot (66) opened on the side wall of the protruding part (62), and movably connected with the lock plates (65) and the lock rod (64); and A limiting assembly (67) arranged on the side wall of the connecting block (61); The limiting assembly (67) comprises: A lock block (671) movably arranged inside the through slot (63), and the two side walls of the lock block (671) are protrudingly arranged, and the lock block (671) is clamped and matched with the through slot (63); A clamping frame (672) movably arranged on the side wall of the connecting block (61), and clamped and matched with the connecting block (61), and the two lock blocks (671) are fixedly connected with the clamping frame (672); and A positioning bolt (673) arranged in the middle part of the clamping frame (672), and threadedly connected with the connecting block (61).

2. The high containment hydraulic actuator of claim 1, wherein, The sealing assembly (7) comprises: Two sealing grooves (71) opened on the hydraulic piston (5), and provided with piston sealing rings (72) inside the sealing grooves (71); Two rod sealing rings (73) arranged on the inner wall of the end cover (2), and the side walls of the two rod sealing rings (73) are in contact with the hydraulic rod (4); and A dustproof ring (74) arranged on the side wall of the hydraulic piston (5).

3. The high containment hydraulic actuator of claim 2, wherein, The side wall of the end cover (2) is bolted with a blocking ring (8), and the inner wall of the blocking ring (8) is in contact with the dustproof ring (74).

4. The high containment hydraulic actuator of claim 3, wherein, The side wall of the connecting block (61) is provided with a limiting strip (9), and the side wall of the clamping frame (672) is in contact with the limiting strip (9).

5. The high containment hydraulic actuator of claim 4, wherein, The inside of the lock slot (66) is provided with a dustproof block (10), and the side wall of the dustproof block (10) is in contact with the lock rod (64) and the lock plate (65).

6. The high containment hydraulic actuator of claim 1, wherein, The two ends of the cylinder barrel (1) are provided with ring grooves (11), and the inside of the ring grooves (11) is provided with a gasket (12).

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