Novel thin induction oil cylinder

Abstract

The utility model discloses a novel thin induction oil cylinder which comprises a cylinder body, the cylinder body is provided with a cavity penetrating in the length direction of the cylinder body, and the cylinder body is provided with a first oil port and a second oil port which can be communicated with the cavity. The first end cover is connected to one end of the cylinder body; the second end cover is connected to the other end of the cylinder body; the piston is arranged in the cavity of the cylinder body, the piston comprises a rod part capable of penetrating through the first end cover and a connecting assembly connected to the end, deviating from the first end cover, of the rod part, a magnetic ring is further arranged on the connecting assembly, and an induction groove used for containing an induction coil is formed in the outer wall of the cylinder body; the two ends of the cavity are provided with threads used for being connected with the first end cover and the second end cover respectively. According to the novel thin induction oil cylinder, the cavity through which the cylinder body penetrates is formed directly, the first end cover and the second end cover are connected to the two ends of the cavity through the threads, and the manufacturing process of the oil cylinder is simplified.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a novel thin-film induction hydraulic cylinder. Background Technology

[0002] Thin-film induction cylinders are hydraulic actuators that convert hydraulic energy into mechanical energy. They are small in size and compact in structure, and are often used in molds and automated equipment. They are mainly composed of four parts: end cap, piston rod, piston and cylinder body. Traditional cylinder bodies are usually made of high-strength aluminum alloy, which has high material cost and large processing volume.

[0003] Current cylinder blocks typically have a central blind hole, so the inner bore of the cylinder block requires a lot of machining, such as end face drilling, internal control reaming and deep hole drilling, which is time-consuming, inefficient and generates a lot of waste. Utility Model Content

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide a new type of thin-film induction cylinder. The cylinder body through the cavity is formed by direct molding, and the two ends of the cavity are connected by threads to the first end cap and the second end cap, which simplifies the manufacturing process of the cylinder.

[0005] Technical solution: This utility model discloses a novel thin-film induction hydraulic cylinder, comprising:

[0006] A cylinder body having a chamber extending along its length, and the cylinder body having a first oil port and a second oil port that communicate with the chamber;

[0007] A first end cap is connected to one end of the cylinder body;

[0008] The second end cap is connected to the other end of the cylinder body;

[0009] A piston is disposed in the chamber of the cylinder body. The piston includes a rod portion that can pass through the first end cap and a connecting assembly connected to the end of the rod portion away from the first end cap. A magnetic ring is also provided on the connecting assembly. The outer wall of the cylinder body is provided with a sensing groove for accommodating an induction coil.

[0010] The two ends of the chamber have threads for connecting to the first end cap and the second end cap, respectively.

[0011] Furthermore, both the first end cap and the second end cap have O-rings between them and the inner wall of the chamber.

[0012] Furthermore, the connecting assembly includes a first connector threadedly connected to the rod and a second connector sleeved on the rod. The first connector has a protrusion, and the magnetic ring is sleeved on the protrusion. The second connector has a recess into which the protrusion can be inserted, the depth of the recess being less than the length of the protrusion. The second connector presses against the first connector.

[0013] Furthermore, the first connector has a wear-resistant ring that contacts the inner wall of the chamber.

[0014] Furthermore, the second connector also has a Gladwell ring that contacts the inner wall of the chamber.

[0015] Furthermore, a sealing ring is also provided between the rod and the second connector.

[0016] Furthermore, the inner wall of the first end cap is also provided with a shaft seal and a step seal.

[0017] Furthermore, a locking screw is provided between the first connector and the rod portion, which is arranged axially along the rod portion.

[0018] Furthermore, the working pressure range of the novel thin-film induction cylinder is below 14 MPa.

[0019] The beneficial effects of this utility model are as follows:

[0020] (1) The novel thin-film induction cylinder described in this utility model has a cylinder body through a cavity formed by direct molding. The first end cap and the second end cap are connected to the two ends of the cavity by threads, which simplifies the manufacturing process of the cylinder.

[0021] (2) The combination of the first connector and the second connector makes the installation of the magnetic ring more convenient. At the same time, the convex and concave structure allows the first connector and the second connector to press against each other to prevent the magnetic ring from shifting axially.

[0022] (3) The wear-resistant ring and the Glyd ring are respectively set on the first connecting member and the second connecting member. This reduces the wear of the connecting components during piston movement and also helps to improve the sealing performance of the piston during movement and extend its service life. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings:

[0024] Figure 1 This is a cross-sectional view of a hydraulic cylinder in the prior art;

[0025] Figure 2 This is a cross-sectional view of the hydraulic cylinder described in this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the novel thin-film induction cylinder described in this utility model;

[0027] Figure 4 This is a cross-sectional view of the hydraulic cylinder described in this utility model, perpendicular to the axial direction.

[0028] Figure 5 This is a schematic diagram of the second connecting member described in this utility model;

[0029] Figure 6 This is a schematic diagram of the first connecting member described in this utility model.

[0030] In the diagram: 1. Cylinder block; 11. Chamber; 111. First oil port; 112. Second oil port; 12. First end cover; 121. Shaft seal; 122. Step seal; 13. Second end cover; 14. O-ring; 15. Sensing groove; 2. Piston; 21. Rod; 211. Sealing ring; 22. First connector; 221. Protrusion; 222. Wear ring; 23. Second connector; 231. Recess; 232. Glyd ring; 24. Magnetic ring. Detailed Implementation

[0031] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0032] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0033] like Figures 1 to 6 As shown, this utility model discloses a novel thin-film induction hydraulic cylinder, comprising:

[0034] The cylinder body 1 has a chamber 11 extending along its length, and the cylinder body 1 is provided with a first oil port 111 and a second oil port 112 that can communicate with the chamber 11.

[0035] A first end cap 12 is connected to one end of the cylinder body 1;

[0036] The second end cap 13 is connected to the other end of the cylinder body 1;

[0037] Piston 2 is disposed in the chamber 11 of the cylinder 1. Piston 2 includes a rod 21 that can pass through the first end cover 12 and a connecting assembly connected to the end of the rod 21 that is away from the first end cover 12. A magnetic ring 24 is also provided on the connecting assembly. The outer wall of the cylinder 1 is provided with a sensing groove 15 for accommodating the induction coil.

[0038] The two ends of the chamber 11 have threads for connecting to the first end cap 12 and the second end cap 13, respectively.

[0039] With the above structure, the first end cap 12 and the second end cap 13 are detachably connected to both ends of the chamber 11, forming a sealable structure with the cylinder body 1. The piston 2 is disposed in the chamber 11, and the rod 21 of the piston 2 passes through the first end cap 12, so that the piston 2 can reciprocate inside the cylinder body 1. The chamber 11 of the hydraulic cylinder, in conjunction with the first oil port 111 and the second oil port 112, enables efficient flow of hydraulic oil, thereby allowing the piston 2 to reciprocate under the pushing action of the hydraulic oil. A magnetic ring 24 is provided on the connecting assembly of the piston 2, which, in conjunction with the sensing groove 15 opened on the outer wall of the cylinder, contains an induction coil to realize the sensing and detection of the position of the piston 2. The cylinder body 1 of this utility model has a through chamber 11, which is different from the blind hole structure of the chamber 11 in the prior art. The chamber 11 of this utility model can be directly extruded during processing, which greatly reduces the amount of machining of the inner hole of the chamber 11, requiring only precision boring. Furthermore, threads are provided at both ends of the chamber 11 for connection with the first end cap 12 and the second end cap 13, thereby facilitating the installation of the first end cap 12 and the second end cap 13 onto the cylinder body 1, simplifying the assembly process and the machining steps of the cylinder body 1 during production. The induction cylinder described in this invention performs the same as a conventional cylinder under a pressure of 14 MPa.

[0040] In this embodiment, an O-ring 14 is provided between the first end cap 12 and the inner wall of the chamber 11, and an O-ring 14 is provided between the second end cap 13 and the inner wall of the chamber 11, thereby ensuring a sealed connection between the first end cap 12, the second end cap 13, and the cylinder 1. When the piston 2 reciprocates within the chamber 11, the O-ring 14 is squeezed by the first end cap 12 or the second end cap 13 against the inner wall of the chamber 11, thereby forming a sealing structure that prevents hydraulic oil from leaking out from the connection between the first end cap 12 or the second end cap 13 and the chamber 11.

[0041] In this embodiment, the connecting assembly includes a first connector 22 threadedly connected to the rod 21 and a second connector 23 sleeved on the rod 21. Specifically, the first connector 22 has a protrusion 221 on which the magnetic ring 24 is sleeved; correspondingly, the second connector 23 has a recess 231 for the protrusion 221 to be inserted. The depth of the recess 231 is less than the length of the protrusion 221, so that the magnetic ring 24 is located between the second connector 23 and the first connector 22. The second connector 23 can press the first connector 22 tightly under the action of hydraulic oil, and can also prevent the magnetic ring 24 from falling off the first connector 22.

[0042] Preferably, the first connecting member 22 has a wear-resistant ring 222 that contacts the inner wall of the chamber 11. The piston 2 reciprocates within the chamber 11 under the action of hydraulic oil. Since the hydraulic oil mainly acts on the first connecting member 22 and the second connecting member 23, the first connecting member 22 reciprocates frequently. The wear-resistant ring 222 provides protection against wear between the first connecting member 22 and the inner wall of the chamber, and also has good sealing properties to prevent oil leakage. The second connecting member 23 also has a Glyd ring 232 that contacts the inner wall of the chamber 11. The Glyd ring 232 also helps to enhance sealing performance and prevent hydraulic oil leakage during piston 2 movement. Furthermore, as a high-performance sealing element, the Glyd ring 232 also possesses good wear resistance and anti-extrusion capabilities, thereby extending the service life of the piston 2.

[0043] Furthermore, a sealing ring 211 is provided between the rod 21 and the second connecting member 23. The sealing ring 211 is fitted on the rod 21 to prevent hydraulic oil from seeping through the connection gap between the rod 21 and the connecting assembly, thereby affecting the hydraulic effect.

[0044] In this embodiment, the inner wall of the first end cap 12 through which the rod 21 passes is provided with a shaft seal 121 and a step seal 122, further improving the sealing performance between the rod 21 and the first end cap 12. The shaft seal 121 prevents hydraulic oil from leaking along the gap between the rod 21 and the first end cap 12, while the step seal 122 serves as a further sealing element, providing better sealing protection. The combined use of the shaft seal 121 and the step seal 122 not only significantly reduces the risk of leakage and ensures stable internal pressure in the cylinder, but also effectively prevents external impurities from entering the cavity, reduces internal wear, and extends the service life of the cylinder.

[0045] Preferably, since the rod 21 and the first connecting member 22 are connected by threads, there is a risk of loosening between the first connecting member 22 and the rod 21 during the repeated movement of the piston 2. A locking screw is also provided between the first connecting member 22 and the rod 21. The locking screw is arranged axially along the rod 21, with a hole drilled between the rod 21 and the first connecting member 22. The locking screw is disposed in the hole and threadedly connected to the first connecting member 22 and the rod 21, thereby further enhancing the stability of the connection between the rod 21 and the first connecting member 22 and preventing the connection between the first connecting member 22 and the rod 21 from loosening.

[0046] The induction cylinder of this utility model has a first end cap 12 and a second end cap 13 that are sealed to the cylinder body 1, thereby ensuring that the hydraulic oil will not leak out of the cylinder body 1 after the chamber 11 is filled with hydraulic oil; the rod 21 is sealed to the first end cap 12, thereby preventing the hydraulic oil from flowing out from the gap between the first end cap 12 and the rod 21. Furthermore, a sealing structure exists between the connecting assembly and the inner wall of the chamber 11. During use, when the piston 2 is in the retracted state, the end of the connecting assembly near the second oil port 112 inside the chamber 11 injects hydraulic oil into the chamber 11. The hydraulic oil acts on the first connecting member 22. Because the connecting assembly and the inner wall of the chamber 11 are sealed, the hydraulic oil cannot leak through the gap between them. Therefore, the hydraulic oil can push the piston 2, causing it to extend outwards. When the piston 2 needs to retract, hydraulic oil is injected into the first oil port 111. The hydraulic oil acts on the second connecting member 23, causing the piston 2 to retract. The hydraulic oil on the side of the first connecting member 22 away from the second connecting member 23 is discharged from the second oil port 112, preventing it from hindering the retraction movement of the piston 2. The novel thin-film induction cylinder described in this invention performs the same as a conventional cylinder under a pressure of 14 MPa.

[0047] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A novel thin-film induction hydraulic cylinder, characterized in that, include: A cylinder body having a chamber extending along its length, and the cylinder body having a first oil port and a second oil port that communicate with the chamber; A first end cap is connected to one end of the cylinder body; The second end cap is connected to the other end of the cylinder body; A piston is disposed in the chamber of the cylinder body. The piston includes a rod portion that can pass through the first end cap and a connecting assembly connected to the end of the rod portion away from the first end cap. A magnetic ring is also provided on the connecting assembly. The outer wall of the cylinder body is provided with a sensing groove for accommodating an induction coil. The two ends of the chamber have threads for connecting to the first end cap and the second end cap, respectively.

2. The novel thin-film induction cylinder according to claim 1, characterized in that, Both the first end cap and the second end cap have O-rings between them and the inner wall of the chamber.

3. The novel thin-film induction cylinder according to claim 1, characterized in that, The connecting assembly includes a first connector threaded to the rod and a second connector sleeved on the rod. The first connector has a protrusion, and the magnetic ring is sleeved on the protrusion. The second connector has a recess for insertion of the protrusion, the depth of which is less than the length of the protrusion. The second connector presses against the first connector.

4. The novel thin-film induction cylinder according to claim 3, characterized in that, The first connector has a wear-resistant ring that contacts the inner wall of the chamber.

5. The novel thin-film induction cylinder according to claim 3, characterized in that, The second connector also has a Gladwell ring that contacts the inner wall of the chamber.

6. The novel thin-film induction cylinder according to claim 3, characterized in that, A sealing ring is also provided between the rod and the second connector.

7. The novel thin-film induction cylinder according to claim 1, characterized in that, The inner wall of the first end cap is also provided with a shaft seal and a step seal.

8. The novel thin-film induction cylinder according to claim 3, characterized in that, The first connector is further provided with a stop screw that is arranged along the axial direction of the rod.

9. The novel thin-film induction cylinder according to claim 1, characterized in that, The working pressure range of the new thin-film induction cylinder is below 14 MPa.

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