Two-stage stroke single-acting oil cylinder with two oil inlets

Abstract

The utility model discloses a two-stage stroke single-action oil cylinder with two oil inlets, relates to the technical field of computer wire arrangement, and provides the following scheme that the two-stage stroke single-action oil cylinder comprises a straight-through type forced filling oil cup, a cylinder body is installed below the straight-through type forced filling oil cup, and a first oil inlet is formed in the right side of the top of the cylinder body. A user introduces oil into the cylinder body through the second oil inlet, the oil enters the cylinder body to push the piston body upwards, and due to blocking of the double-acting sealing piece, the oil cannot enter the left side of the piston body, at the moment, the piston body and the piston rod installed in the piston body move upwards synchronously till the end of the piston body makes contact with the end face of the cylinder cover for limiting; the operation distance of the oil cylinder is the first stroke, when the first oil inlet is communicated with oil inwards, the oil can enter the piston inner cavity through a hole formed in the left side of the piston body, and at the moment, the piston rod continues to ascend till the shaft steel wire check ring installed on the piston rod makes contact with the end face of the cylinder cover for limiting.

Description

Technical Field

[0001] The utility model relates to the technical field of a two-oil-inlet oil cylinder, in particular to a two-stage stroke single-acting oil cylinder with two oil inlets. Background Art

[0002] The cylinder, also known as the hydraulic cylinder or oil pressure cylinder, is one of the key components in the hydraulic system. Its main function is to convert the pressure energy of the liquid into linear or rotational mechanical motion. The cylinder is usually composed of a cylindrical metal cylinder with a piston and a piston rod inside. When the hydraulic oil enters the cylinder through the inlet, the pressure acts on the piston, pushing the piston to perform linear reciprocating motion in the cylinder or pushing the piston rod to perform rotational motion, thereby driving the mechanical parts connected to it to work.

[0003] However, the oil cylinder in the prior art is a single-stroke oil cylinder, so the control precision is insufficient during use, the use is not flexible and efficient enough, and it does not meet people's use needs. Therefore, a two-stage stroke single-acting oil cylinder with two oil inlets is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a two-stage stroke single-acting cylinder with two oil inlets, which solves the problem that the cylinder in the prior art is a single-stroke cylinder, so the control precision is insufficient during use, the use is not flexible and efficient enough, and the use needs of people are not met.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-stage stroke single-acting cylinder with two oil inlets, including a straight-through pressure injection oil cup, a cylinder body is installed below the straight-through pressure injection oil cup, a first oil inlet is opened on the right side of the top of the cylinder body, and a second oil inlet is opened on the left side of the top of the cylinder body. A cylinder barrel is installed inside the cylinder body, a piston body is installed inside the cylinder barrel, a piston inner cavity is opened inside the piston body, a piston rod is installed inside the piston inner cavity, and a wire retaining ring for the shaft is installed on the right end of the piston rod.

[0006] Preferably, the piston rod is provided with a groove that matches the size of the shaft wire retaining ring; an oil hole is provided between the piston body and the cylinder body, the piston body is provided with a double-acting seal, the cylinder head is provided with a retaining plate and an O-ring on the outside, the retaining plate and the O-ring are arranged in parallel, the cylinder head is provided with a dust ring and a universal sealing ring on the inside, the dust ring and the universal sealing ring are arranged in parallel; the piston rod is threadedly connected to the earring, the earring is provided with a groove, the inner thread of the earring can be tightened by a locking bolt, and the earring and the bottom of the retaining plate are provided with radial spherical bearings.

[0007] Preferably, an elastic retaining ring for a hole is installed on the top of the radial spherical plain bearing, and externally threaded plastic plugs are installed inside the first oil inlet and the second oil inlet.

[0008] Preferably, the cylinder body is composed of a cylinder barrel, a first oil inlet and a second oil inlet which are welded to each other.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] When the device is in use, the user passes oil into the interior of the cylinder body through the first oil inlet. The oil enters the interior of the cylinder body and pushes the piston body upward. Due to the blocking effect of the double-acting seal, the oil will not enter the left side of the piston body. At this time, the piston body and the piston rod installed inside move upward synchronously until the end of the piston body contacts the end face of the cylinder cover to limit the position. At this time, the cylinder running distance is stroke one. When the second oil inlet passes oil inward, the oil will enter the interior of the piston cavity through the hole opened on the left side of the piston body. At this time, the piston rod continues to rise until the shaft installed on the piston rod contacts the end face of the cylinder cover to limit the position. At this time, the continued rising distance is stroke two.

[0011] By setting two oil inlets, the device controls the flow of the two oil inlets to achieve different working effects. Stroke one allows the cylinder to quickly approach the stroke, and the piston body is quickly pushed to move through the second oil inlet to achieve rapid initial movement. The stroke is used to achieve more precise control, and the piston rod is slowly pushed through the first oil inlet to complete the remaining movement. This is usually used to perform tasks that require high-precision positioning. The two-stage stroke cooperates with each other, making the device efficient and flexible as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a two-stage stroke single-acting cylinder with two oil inlets proposed by the utility model;

[0013] Figure 2 This is a schematic cross-sectional structural diagram of a wire management frame of a two-stage stroke single-acting oil cylinder with two oil inlets proposed by the utility model;

[0014] Figure 3 The utility model provides a schematic diagram of a connecting column connection structure of a two-stage stroke single-acting oil cylinder with two oil inlets.

[0015] In the figure: 1. straight-through pressure injection oil cup; 2. earring; 3. piston rod; 4. dust ring; 5. universal sealing ring; 6. cylinder head; 7. baffle; 8. O-ring; 9. cylinder body; 10. piston body; 11. wire retaining ring for shaft; 12. double-acting seal; 13. elastic retaining ring for hole; 14. radial spherical bearing; 15. external threaded plastic plug; 16. piston inner cavity; 17. locking bolt; 18. first oil inlet; 19. second oil inlet; 20. cylinder barrel. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0017] like Figure 1-3 As shown, a two-stage stroke single-acting cylinder with two oil inlets includes a straight-through pressure injection oil cup 1, a cylinder body 9 is installed below the straight-through pressure injection oil cup 1, a first oil inlet 18 is opened on the top right side of the cylinder body 9, and a second oil inlet 19 is opened on the top left side of the cylinder body 9, a cylinder barrel 20 is installed inside the cylinder body 9, a piston body 10 is installed inside the cylinder barrel 20, a piston inner cavity 16 is opened inside the piston body 10, a piston rod 3 is installed inside the piston inner cavity 16, and a shaft wire retaining ring 11 is installed on the right end of the piston rod 3. During use, the first oil inlet 18 and the second oil inlet 19 can both pass oil to the inside of the device.

[0018] The piston rod 3 is provided with a groove that matches the size of the shaft wire retaining ring 11; an oil hole is provided between the piston body 10 and the piston inner cavity 16, and a double-acting seal 12 is provided on the piston body 10. A retaining plate 7 and an O-ring 8 are provided on the outside of the cylinder head 6, and the retaining plate 7 and the O-ring 8 are arranged in parallel. A dust ring 4 and a universal sealing ring 5 are provided inside the cylinder head 6, and the dust ring 4 and the universal sealing ring 5 are arranged in parallel; the piston rod 3 is threadedly connected to the earring 2, and a groove is provided on the earring 2, and the inner thread of the earring 2 can be locked Tighten the bolts 17, and the earring 2 and the bottom of the baffle 7 are both provided with a radial spherical bearing 14. When oil is passed through the second oil inlet 19, the piston body 10 and the piston rod 3 rise upward together inside the cylinder body 9 until the piston body 10 contacts the end surface of the cylinder cover 6 to limit the position. At this time, the cylinder running distance is stroke one. When oil is passed through the first oil inlet 18, the piston rod 3 continues to rise until the shaft mounted on the piston rod 3 contacts the end surface of the cylinder cover 6 to limit the position. At this time, the continued rising distance is stroke two.

[0019] A hole elastic retaining ring 13 is installed on the top of the radial spherical bearing 14, and externally threaded plastic plugs 15 are installed inside the first oil inlet 18 and the second oil inlet 19. The externally threaded plastic plug 15 can seal the second oil inlet 19 to facilitate the control of the oil inlet cavity used.

[0020] The cylinder body 9 is composed of a cylinder barrel 20, a first oil inlet 18 and a second oil inlet 19 which are welded to each other, so that the device has an ingenious structure, is easy to process, and is convenient to install, disassemble and maintain.

[0021] Working principle: First, the user passes oil into the cylinder body 9 through the first oil inlet 18. The oil enters the cylinder body 9 and pushes the piston body 10 upward. Due to the blocking of the double-acting seal 12, the oil will not enter the left side of the piston body 10. At this time, the piston body 10 and the piston rod 3 installed inside move upward synchronously until the end of the piston body 10 contacts the end surface of the cylinder cover 6 to limit the position. At this time, the cylinder running distance is stroke one. When the second oil inlet 19 passes oil inward, the oil will enter the piston inner cavity 16 through the hole opened on the left side of the piston body 10. At this time, the piston rod 3 continues to rise. , until the shaft wire retaining ring 11 installed on the piston rod 3 contacts the end face of the cylinder cover 6 to limit the position. At this time, the distance to continue to rise is the second stroke. The device controls the flow of the two oil inlets to achieve different working effects. Stroke one allows the cylinder to quickly approach the stroke, and quickly pushes the piston body 10 to move through the first oil inlet 18 to achieve rapid initial movement. Stroke two is used to achieve more precise control, and slowly pushes the piston rod 3 through the second oil inlet 19 to complete the remaining movement. This is usually used to perform tasks that require high-precision positioning. The two-stage stroke cooperates with each other, making the device efficient and flexible as a whole.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-stage stroke single-acting cylinder with two oil inlets, comprising a straight-through pressure injection oil cup (1), characterized in that: A cylinder body (9) is installed below the straight-through pressure injection oil cup (1), a first oil inlet (18) is opened on the right side of the top of the cylinder body (9), a second oil inlet (19) is opened on the left side of the top of the cylinder body (9), a cylinder barrel (20) is installed inside the cylinder body (9), a piston body (10) is installed inside the cylinder barrel (20), a piston inner cavity (16) is opened inside the piston body (10), a piston rod (3) is installed inside the piston inner cavity (16), and a shaft wire retaining ring (11) is installed at the right end of the piston rod (3).

2. A two-stage stroke single-acting cylinder with two oil inlets according to claim 1, characterized in that: The piston rod (3) is provided with a groove that matches the size of the shaft wire retaining ring (11); an oil hole is provided between the piston body (10) and the cylinder body (9); a double-acting seal (12) is provided on the piston body (10); a retaining plate (7) and an O-ring (8) are provided on the outside of the cylinder head (6); the retaining plate (7) and the O-ring (8) are arranged in parallel; a dust ring (4) and a universal sealing ring (5) are provided on the inside of the cylinder head (6); the dust ring (4) and the universal sealing ring (5) are arranged in parallel; the piston rod (3) is threadedly connected to the earring (2); the earring (2) is provided with a groove; the inner thread of the earring (2) can be tightened by a locking bolt (17); and the bottoms of the earring (2) and the retaining plate (7) are both provided with radial spherical bearings (14).

3. A two-stage stroke single-acting cylinder with two oil inlets according to claim 2, characterized in that: A hole elastic retaining ring (13) is installed on the top of the radial spherical bearing (14), and externally threaded plastic plugs (15) are installed inside the first oil inlet (18) and the second oil inlet (19).

4. A two-stage stroke single-acting cylinder with two oil inlets according to claim 1, characterized in that: The cylinder body (9) is composed of a cylinder barrel (20), a first oil inlet (18) and a second oil inlet (19) which are welded together.

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