Lightweight oil cylinder

Abstract

The light-weight oil cylinder comprises a lug seat, a guide sleeve, a cylinder barrel, a piston rod, a piston and an end cover, the piston is arranged in the cylinder barrel, one end of the piston rod penetrates into the cylinder barrel to be fixedly connected with the piston, a locking valve set is arranged on the upper portion of one end of the cylinder barrel, and the locking valve set comprises a valve block and a balance valve. An oil port I, an oil port II, a port A and a port B are formed in the valve block, the oil port I is communicated with a cylinder barrel oil inlet in the cylinder barrel, the oil port I and the cylinder barrel oil inlet are sealed through a sealing ring, and the oil port II is communicated with a cylinder barrel oil outlet in the cylinder barrel through an oil pipe and a hinged joint; the whole structure is simple, implementation is easy, the oil cylinder can be popularized and used in various occasions, the weight of the oil cylinder can be effectively reduced by about 40% under the condition that the using performance is met, light weight is achieved, real-time displacement can be detected, automatic work is facilitated, the oil cylinder is provided with the locking valve set which is integrated with the oil cylinder, and the locking function can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a lightweight oil cylinder. Background Art

[0002] As a common actuator in a hydraulic system, the oil cylinder can be used alone. A conventional oil cylinder is generally composed of a cylinder barrel, an end cover, a piston, a guide sleeve and an ear seat, but the function of this type of oil cylinder is single. For example, Chinese application No. 202222264029.3 discloses an oil cylinder structure. The defect of this type of oil cylinder is that it only has a single telescopic function and cannot realize the complete locking function and displacement detection function of the oil cylinder. An external displacement sensor and a locking valve are required, resulting in messy pipelines. Moreover, the material used for the general oil cylinder is steel, or carbon fiber, polymer, etc. for special occasions. For occasions with weight requirements, steel is relatively heavy, while carbon fiber or polymer is light in weight but high in cost. China Patent application No. 202220862384.8 discloses a lightweight self-locking cylinder, a locking ring between the left end face of the cylinder barrel and the bottom of the cylinder, a number of steel balls are installed on the outer peripheral wall of the piston assembly, a spacer liner is inserted into the piston assembly, and the steel ball is pushed upward, the steel ball is embedded in the locking ring, and the cylinder is in a self-locking state; the piston assembly is away from the spacer liner, the steel ball falls downward, and the cylinder is in an unlocked state. Although the self-locking function can be achieved, the structure uses a spring, and the compression strength of the spring will change over time, resulting in failure of the self-locking function and unstable operation. Therefore, a lightweight cylinder that can meet the weight requirements and work stably is needed, so a lightweight cylinder is proposed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a lightweight oil cylinder with a simple overall structure, which is easy to implement and can be promoted and used in various occasions. It can effectively reduce the weight of the oil cylinder by about 40% while meeting the performance requirements, thereby achieving lightweight. It can also detect real-time displacement and facilitate automated work. A locking valve group is installed on the oil cylinder and integrated with it to realize the locking function, making the use of the oil cylinder more precise and reliable, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lightweight oil cylinder, including an ear seat, a guide sleeve, a cylinder barrel, a piston rod, a piston and an end cover, the piston is arranged inside the cylinder barrel, one end of the piston rod penetrates into the interior of the cylinder barrel and is fixedly connected to the piston, a locking valve group is arranged on the upper part of one end of the cylinder barrel, the locking valve group includes a valve block and a balancing valve, the valve block is provided with oil port I, oil port II, port A and port B, oil port I is connected with the cylinder barrel oil inlet on the cylinder barrel, and oil port I is sealed with the cylinder barrel oil inlet through a sealing ring, oil port II is connected with the cylinder barrel oil outlet on the cylinder barrel through an oil pipe and an articulated joint, a displacement sensor is installed inside the end cover, and the displacement sensor is fixed to the end cover through a retaining ring, two balancing valves are arranged, and the balancing valves are respectively inserted in the left and right valve holes of the valve block.

[0005] Furthermore, a square platform is arranged on the surface of one end of the cylinder, a threaded hole is opened on the square platform, a screw hole is arranged on the valve block, and the valve block is connected and fixed to the threaded hole by screws.

[0006] Furthermore, a guide sleeve is provided inside one end of the cylinder, one end of the piston rod passes through the guide sleeve and is fixedly connected to the piston, and an ear seat is provided at the other end of the piston rod. The piston divides the interior of the cylinder into two chambers. The chamber formed between the piston and the end cover is a rodless chamber, and the chamber formed between the piston and the guide sleeve is a rod chamber. The oil inlet of the cylinder is connected to the rodless chamber, and the oil outlet of the cylinder is connected to the rod chamber.

[0007] Furthermore, a stepped hole is provided in the end cover, an end cover fixing platform is provided at one end of the end cover, an end cover ear seat is provided on the end cover fixing platform, and oil holes are provided on the circumference of the other end of the end cover, and the oil holes are evenly arranged along the circumferential direction of the end cover. There are also wire holes on the end cover, and the wire holes are arranged at an angle with the plane of the end cover ear seat, and the wire holes are provided on the circumference of the end cover fixing platform, and the wire holes are communicated with the stepped holes.

[0008] Furthermore, the number of threaded holes is three and they are arranged in a triangle, and the screw holes correspond to the threaded holes one by one.

[0009] Furthermore, the cylinder barrel, end cover, valve block, piston and guide sleeve are made of aluminum alloy material, and the piston rod, ear seat, end cover ear seat and end cover fixing platform are made of steel material.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The overall structure is simple and easy to implement. It can be promoted and used in various occasions. It can effectively reduce the weight of the cylinder by about 40% while meeting the performance requirements, achieving lightweight. A locking valve group is installed on the cylinder and integrated with it. When the cylinder piston stops at any position, the hydraulic oil circuit can be completely locked and fixed, saving energy, reducing connecting pipes, saving space, and making the use of the cylinder more precise and reliable.

[0012] 2. The displacement sensor is installed in the stepped hole inside the end cover and fixed with a retaining ring to monitor the displacement of the cylinder in real time, which is convenient for the automatic operation of the cylinder. The built-in displacement sensor saves space, is easy to install, and has strong anti-interference ability and environmental tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the utility model in a front cross-section;

[0014] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the cylinder structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the locking valve group of the utility model;

[0017] Figure 5 It is a schematic diagram of the end cover structure of the utility model.

[0018] In the figure: 1 ear seat, 2 guide sleeve, 3 cylinder, 31 square platform, 32 cylinder oil inlet, 33 cylinder oil outlet, 34 threaded hole, 4 piston rod, 5 locking valve group, 51 valve block, 511 A port, 512 B port, 513 oil port I, 514 oil port II, 515 screw hole, 52 balance valve, 6 piston, 7 retaining ring, 8 displacement sensor, 9 end cover, 91 oil hole, 92 stepped hole, 93 wire hole, 94 end cover ear seat, 95 end cover fixing platform, 10 hinged joint, 11 oil pipe, 12 cable connector, 13 screws, 14 sealing ring. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] See also Figure 1-5The utility model provides a technical solution: a lightweight oil cylinder, including an ear seat 1, a guide sleeve 2, a cylinder barrel 3, a piston rod 4, a piston 6 and an end cover 9, the piston 6 is arranged inside the cylinder barrel 3, one end of the piston rod 4 penetrates into the interior of the cylinder barrel 3 and is fixedly connected to the piston 6, a locking valve group 5 is arranged on the upper part of one end of the cylinder barrel 3, the locking valve group 5 includes a valve block 51 and a balance valve 52, the valve block 51 is provided with an oil port Ⅰ513, an oil port Ⅱ514, an A port 511 and a B port 512, the oil port Ⅰ513 is connected to the cylinder barrel oil inlet 32 ​​on the cylinder barrel 3, and the oil port Ⅰ513 is connected to the cylinder barrel oil inlet 32, and the oil port Ⅰ513 is connected to the cylinder barrel oil inlet 32. The cylinder oil inlet 32 ​​is sealed by a sealing ring 14, and the oil port II 514 is connected with the cylinder oil outlet 33 on the cylinder 3 through the oil pipe 11 and the hinged joint 10 to form an integrated oil cylinder, reduce connecting pipelines, and save space. A displacement sensor 8 is installed inside the end cover 9, and the displacement sensor 8 is fixed to the end cover 9 through a retaining ring 7. The lead of the displacement sensor is led out from the end cover 9 with a cable connector. Two balancing valves 52 are provided, and the balancing valves 52 are respectively inserted in the left and right valve holes of the valve block 51. The A port 511 and the B port 512 are used to connect the return oil pipeline and the oil inlet pipeline in the system.

[0021] A square platform 31 is provided on the surface of one end of the cylinder 3, a threaded hole 34 is opened on the square platform 31, a screw hole 515 is provided on the valve block 51, and the valve block 51 is connected and fixed to the threaded hole 34 by a screw 13. The square platform 31 is used to fix the locking valve group 5. The specially provided square platform 31 effectively reduces the size of the equipment.

[0022] A guide sleeve 2 is provided inside one end of the cylinder 3, one end of the piston rod 4 passes through the guide sleeve 2 and is fixedly connected to the piston 6, and an ear seat 1 is provided at the other end of the piston rod 4. The piston 6 divides the inside of the cylinder 3 into two chambers. The chamber formed between the piston 6 and the end cover 9 is a rodless chamber, and the chamber formed between the piston 6 and the guide sleeve 2 is a rod chamber. The cylinder oil inlet 32 ​​leads to the rodless chamber, and the cylinder oil outlet 33 leads to the rod chamber.

[0023] A stepped hole 92 is provided in the end cover 9, and the stepped hole 92 cooperates with the retaining ring 7 to fix the displacement sensor 8. An end cover fixing platform 95 is provided at one end of the end cover 9, and an end cover ear seat 94 is provided on the end cover fixing platform 95. An oil hole 91 is provided on the circumference of the other end of the end cover 9. The oil hole 91 is evenly arranged along the circumferential direction of the end cover 9. When the oil inlet 32 ​​of the cylinder barrel feeds oil into the rodless cavity, it is ensured that the oil can normally fill the rodless cavity to push the piston and the piston rod to move. A wire hole 93 is also provided on the end cover 9. In order to avoid interference between the cable connector and the balance valve 52 on the locking valve group 5, the wire hole 93 and the plane of the end cover ear seat 94 are set at an angle, and the wire hole 93 is provided on the circumference of the end cover fixing platform 95. The wire hole 93 is communicated with the stepped hole 92, and the lead of the displacement sensor 8 is led to the outside of the end cover 9 through the cable connector.

[0024] There are three threaded holes 34 arranged in a triangle. The screw holes 515 correspond to the threaded holes 34 one by one. The triangular arrangement ensures that the valve block 51 is firmly fixed. The connection method of the screws 13 is easy to disassemble and install.

[0025] The cylinder barrel 3, the end cover 9, the valve block 51, the piston 6 and the guide sleeve 2 are made of aluminum alloy. The use of aluminum alloy for some parts can effectively reduce the weight of the cylinder by about 40% while meeting the performance requirements, thereby achieving lightweight. The piston rod 4, the ear seat 1, the end cover ear seat 94 and the end cover fixing platform 95 are made of steel, which ensures the strength and bending stability of the cylinder.

[0026] The working principle and working process of the utility model are as follows:

[0027] As attached Figure 1 The figure shows the initial position. When the cylinder needs to work, the system passes a certain pressure oil to the B port 512 on the valve block 51. The oil enters the locking valve group 5, passes through the balance valve 52, comes out from the oil port Ⅰ513, and enters the rodless chamber of the cylinder through the cylinder oil inlet 32 ​​and the oil hole 91, pushing the piston 6 and the piston rod 4 to extend outward. At this time, the oil in the rod chamber of the cylinder comes out through the cylinder oil outlet 33, flows through the oil pipe 11 and the balance valve 52, and returns to the system from the A port 511.

[0028] During the extension of the piston rod 4, the displacement sensor 8 monitors the stroke of the piston rod 4 in real time. When the piston rod 4 is extended to the required working position and is about to stop, the system stops supplying oil to the B port 512, and the piston rod 4 stops extending. After the locking valve group 5 is activated, the cylinder is completely locked, and the piston rod 4 can still stop at the working position without being retracted under load.

[0029] Similarly, when the work is completed and the piston rod 4 of the cylinder needs to be retracted, when the system passes a certain pressure of oil to the A port 511, the oil enters the locking valve group 5, passes through the balance valve 52, comes out from the oil port II 514, and enters the rod chamber of the cylinder through the cylinder oil outlet 33, pushing the piston 6 and the piston rod 4 to be retracted inward. At this time, the oil in the rodless chamber of the cylinder comes out through the cylinder oil inlet 33, flows through the locking valve group 5, and returns to the system from the B port 512 until the piston rod 4 is fully retracted.

[0030] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A lightweight oil cylinder, comprising an ear seat (1), a guide sleeve (2), a cylinder barrel (3), a piston rod (4), a piston (6) and an end cover (9), characterized in that: The piston (6) is arranged inside the cylinder (3), one end of the piston rod (4) penetrates into the cylinder (3) and is fixedly connected to the piston (6), a locking valve group (5) is arranged on the upper part of one end of the cylinder (3), the locking valve group (5) comprises a valve block (51) and a balance valve (52), the valve block (51) is provided with an oil port I (513), an oil port II (514), an A port (511) and a B port (512), the oil port I (513) is connected to the cylinder oil inlet (32) on the cylinder (3), and the oil port II (514) is connected to the cylinder oil inlet (32) on the cylinder (3). The oil port I (513) and the cylinder oil inlet (32) are connected, and the oil port II (514) and the cylinder oil outlet (33) on the cylinder (3) are sealed by a sealing ring (14). The oil port II (514) and the cylinder oil outlet (33) on the cylinder (3) are connected by an oil pipe (11) and a hinge joint (10). A displacement sensor (8) is installed inside the end cover (9), and the displacement sensor (8) is fixed to the end cover (9) by a retaining ring (7). Two balancing valves (52) are provided, and the balancing valves (52) are respectively inserted into the left and right valve holes of the valve block (51).

2. A lightweight oil cylinder according to claim 1, characterized in that: A square platform (31) is provided on the surface of one end of the cylinder barrel (3), a threaded hole (34) is provided on the square platform (31), a screw hole (515) is provided on the valve block (51), and the valve block (51) is connected and fixed to the threaded hole (34) by means of a screw (13).

3. A lightweight oil cylinder according to claim 1, characterized in that: A guide sleeve (2) is provided inside one end of the cylinder barrel (3), one end of the piston rod (4) passes through the guide sleeve (2) and is fixedly connected to the piston (6), the other end of the piston rod (4) is provided with an ear seat (1), the piston (6) divides the inside of the cylinder barrel (3) into two chambers, the chamber formed between the piston (6) and the end cover (9) is a rodless chamber, and the chamber formed between the piston (6) and the guide sleeve (2) is a rod chamber, the cylinder barrel oil inlet (32) is connected to the rodless chamber, and the cylinder barrel oil outlet (33) is connected to the rod chamber.

4. A lightweight oil cylinder according to claim 1, characterized in that: A stepped hole (92) is provided in the end cover (9), an end cover fixing platform (95) is provided at one end of the end cover (9), an end cover ear seat (94) is provided on the end cover fixing platform (95), an oil hole (91) is provided on the circumference of the other end of the end cover (9), the oil holes (91) are evenly arranged along the circumferential direction of the end cover (9), and a wire hole (93) is also provided on the end cover (9), an angle is formed between the wire hole (93) and the plane of the end cover ear seat (94), and the wire hole (93) is provided on the circumference of the end cover fixing platform (95), and the wire hole (93) is communicated with the stepped hole (92).

5. A lightweight oil cylinder according to claim 2, characterized in that: The number of threaded holes (34) is three and they are arranged in a triangle, and the screw holes (515) correspond to the threaded holes (34) one by one.

6. A lightweight oil cylinder according to claim 3, characterized in that: The cylinder barrel (3), the end cover (9), the valve block (51), the piston (6) and the guide sleeve (2) are made of an aluminum alloy material, and the piston rod (4), the ear seat (1), the end cover ear seat (94) and the end cover fixing platform (95) are made of a steel material.

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