Anti-falling oil cylinder with built-in anti-explosion valve

Abstract

The utility model discloses an anti-falling oil cylinder with a built-in anti-explosion valve, which comprises a piston rod and an oil cylinder body arranged on the piston rod, and is characterized in that an oil path channel is arranged on the piston rod, the anti-explosion valve is arranged in the oil path channel, a piston head is arranged on the piston rod, and the piston head is arranged on the piston rod. The piston head divides the interior of the oil cylinder body into a first cavity and a second cavity, the oil way channel is provided with a first opening and a second opening, the first opening is located in the first cavity, and the second opening is located in the second cavity. The explosion-proof valve is arranged in the piston rod, and the oil channel on the piston rod is used for replacing a traditional pipeline assembly, so that the oil cylinder assembly is simpler and more attractive in appearance, the problems that a pipeline is complex in shape and interferes with other parts are effectively solved, installation is convenient, and the manufacturing cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of electric lifting platforms, in particular to an explosion-proof valve built-in anti-fall oil cylinder. Background Art

[0002] During the use of the lifting platform, in order to prevent the lifting platform's tensile belt from breaking and the lifting platform's table from falling and causing safety accidents, it is necessary to equip it with an anti-fall cylinder assembly. The anti-fall cylinder currently used by the lifting platform has the pipeline assembly placed on the outside, which is easily deformed and failed by collision or extrusion; at the same time, due to the compact internal space of the lifting platform, in order to avoid other components, sometimes the shape of the pipeline assembly is very complex, and the spatial angle is not accurate enough when bending. When replacing spare parts, it is impossible to ensure that the shape is completely consistent, which makes installation difficult, and there is also the problem of interference with other components. Summary of the Invention

[0003] The main technical problem solved by the utility model is to effectively solve the problems of complex pipeline shapes and interference with other components.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-fall oil cylinder with a built-in explosion-proof valve, including a piston rod and a cylinder body arranged on the piston rod, an oil passage is provided on the piston rod, an explosion-proof valve is installed in the oil passage, a piston head is provided on the piston rod, and the piston head divides the inner part of the cylinder body into a first cavity and a second cavity, the oil passage is provided with a first opening and a second opening, the first opening is located in the first cavity, and the second opening is located in the second cavity.

[0005] Furthermore, the piston rod includes a first piston rod and a second piston rod, the first piston rod is provided with a first oil passage, the second piston rod is provided with a second oil passage, the first piston rod and the second piston rod are connected by threads, and after the first piston rod and the second piston rod are assembled, the first oil passage and the second oil passage are connected to form an oil passage.

[0006] Furthermore, the end of the first piston rod close to the second piston rod is raised in the radial direction to form a piston head, and a groove is formed inward in the axial direction at the end of the first piston rod close to the second piston rod, and a thread is provided on the inner wall of the groove. The end of the second piston rod close to the first piston rod is provided with an external thread, and the first piston rod and the second piston rod are connected by the thread and the external thread.

[0007] Furthermore, the piston head is annular and provided with an internal thread, the first piston rod and the second piston rod are both provided with an external thread, and the first piston rod and the second piston rod are connected through the piston head.

[0008] Furthermore, the explosion-proof valve is installed in the first oil channel or the second oil channel.

[0009] Furthermore, the first oil channel and the second oil channel are provided with internal threaded holes, and the explosion-proof valve is installed in the first oil channel or the second oil channel through threaded connection.

[0010] Furthermore, at least one limiting protrusion is provided on the piston rod, and the limiting protrusion is located on a side of the oil passage opening away from the piston head.

[0011] Furthermore, there are two limiting protrusions, and the two limiting protrusions are respectively installed on the first piston rod and the second piston rod.

[0012] Furthermore, the limiting protrusion is an annular limiting protrusion.

[0013] Furthermore, a sealing ring is provided on the piston head.

[0014] The beneficial effects of the present invention are: (1) by integrating the explosion-proof valve into the piston rod to connect the oil passage, the structure of the oil cylinder assembly is optimized, space is effectively saved, and deformation and failure of the oil passage due to collision or extrusion are avoided; (2) the piston rod is a split piston rod, which reduces the number of assembly steps during installation, facilitates the replacement of spare parts, and makes the overall appearance more simple and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the piston rod of the utility model;

[0017] The markings of the components in the accompanying drawings are as follows:

[0018] 1. Piston rod; 11. First piston rod; 12. Second piston rod; 13. First oil passage; 14. Second oil passage; 15. Limiting protrusion; 16. First opening; 17. Second opening; 2. Cylinder body; 3. Piston head; 4. Explosion-proof valve. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] Please refer to Figures 1-2 , the utility model includes:

[0021] An explosion-proof valve built-in anti-fall oil cylinder includes a piston rod 1, a cylinder body 2 provided on the piston rod 1, an oil passage provided on the piston rod 1, an explosion-proof valve 4 installed in the oil passage, a piston head 3 provided on the piston rod 1, the piston head 3 dividing the interior of the cylinder body 2 into a first cavity and a second cavity, the oil passage is provided with a first opening 16 and a second opening 17, the first opening 16 is located in the first cavity, and the second opening 17 is located in the second cavity. Here, the first cavity and the second cavity are two independent sealed cavities, the oil passage is provided inside the piston rod 1, and the explosion-proof valve 4 is fixedly installed in the oil passage. When closed, the explosion-proof valve 4 divides the oil passage into two non-connected channels. When the pressure in the first cavity is too high, the explosion-proof valve 4 opens to connect the oil passage, and the hydraulic oil in the first cavity flows into the second cavity through the oil passage flow channel, and the cylinder body 2 moves slowly on the piston rod 1.

[0022] More specifically, the piston rod 1 includes a first piston rod 11 and a second piston rod 12. The first piston rod 11 is provided with a first oil passage 13, and the second piston rod 12 is provided with a second oil passage 14. The first piston rod 11 and the second piston rod 12 are connected by threads. After the first piston rod 11 and the second piston rod 12 are assembled, the first oil passage 13 and the second oil passage 14 are connected to form an oil passage. Here, the piston rod 1 is formed by the first piston rod 11 and the second piston rod 12 being connected by threads. After the first piston rod 11 and the second piston rod 12 are assembled, the first oil passage 13 and the second oil passage 14 are connected to form an oil passage. The threaded connection between the first piston rod 11 and the second piston rod 12 makes disassembly or assembly more convenient, and also makes it easier to process the first oil passage 13 and the second oil passage 14. At the same time, a sealing ring is provided at the connection between the first piston rod 11 and the second piston rod 12 to prevent oil leakage after installation.

[0023] More specifically, the end of the first piston rod 11 near the second piston rod 12 is radially raised to form a piston head 3. A groove is formed inwardly along the axial direction at the end of the first piston rod 11 near the second piston rod 12, with threads provided on the inner wall of the groove. The end of the second piston rod 12 near the first piston rod 11 is provided with external threads, and the first and second piston rods 11, 12 are connected by the threads and external threads. Here, the first piston rod 11 and the piston head 3 are integrally formed through a turning and milling process. During installation, the second piston rod 12 is installed within the first piston rod 11, completing the installation of the piston rod 1.

[0024] More specifically, the piston head 3 is annular and has an internal thread, and the first piston rod 11 and the second piston rod 12 both have external threads, and the first piston rod 11 and the second piston rod 12 are connected via the piston head 3. Here, the connecting ends of the first piston rod 11 and the second piston rod 12 are both provided with external threads, and the piston head 3 is a ring nut. Typically, the piston head 3 is mounted on the first piston rod 11, and during installation, the first piston rod 11 and the second piston rod 12 are connected via the piston head 3.

[0025] More specifically, the explosion-proof valve 4 is installed in the first oil passage 13 or the second oil passage 14. The first oil passage 13 and the second oil passage 14 are provided with internal threaded holes. The explosion-proof valve 4 is installed in the first oil passage 13 or the second oil passage 14 through a threaded connection. Here, whether the explosion-proof valve 4 is installed in the first oil passage 13 or the second oil passage 14 does not affect the use. The first oil passage 13 and the second oil passage 14 can both be provided with internal threaded holes for installing the explosion-proof valve 4. The internal threaded holes are provided at the end where the first oil passage 13 and the second oil passage 14 are connected. The explosion-proof valve 4 is connected in the oil passage through a threaded connection.

[0026] More specifically, at least one limiting protrusion 15 is provided on the piston rod 1. The limiting protrusion 15 is an annular limiting protrusion 15 and is located on the side of the oil passage opening away from the piston head 3. Figure 2 As shown, position a is the side of the oil channel opening away from the piston head 3, and position b is the side of the oil channel opening close to the piston head 3. The limiting protrusion 15 is set at position a, and the piston head 3 is set at position b. On the one hand, such a setting prevents the oil channel outlet from detaching from the cavity and causing oil leakage when the cylinder body 2 is displaced too much, and on the other hand, it ensures the maximum displacement of the cylinder body 2 without oil leakage. The annular limiting protrusion 15 has a larger contact area with the cylinder body when limiting, and can also act as a reinforcing rib to ensure the service life of the piston rod 1 and the cylinder body 2.

[0027] More specifically, there are two limiting protrusions 15, one mounted on the first piston rod 11 and the other on the second piston rod 12. The limiting protrusion 15 on the first piston rod 11 is located adjacent to the first opening 16, while the limiting protrusion 15 on the second piston rod 12 is located adjacent to the second opening 17. The piston head 3 is located between the two limiting protrusions 15. The two limiting protrusions 15 on the piston rod 1 limit the maximum displacement of the cylinder body 2 on the piston rod 1 to the length of the cylinder body 2 cavity minus the length of the two non-opposing sides of the two limiting protrusions 15.

[0028] More specifically, a sealing ring is provided on the piston head 3. Here, providing the sealing ring on the piston head 3 can provide a better sealing effect for the piston head 3, thereby preventing the first cavity and the second cavity from communicating.

[0029] To sum up, the utility model optimizes the structure of the cylinder assembly by splitting the piston rod 1 into the first piston rod 11 and the second piston rod 12, and installing the explosion-proof valve 4 in the first oil channel 13 inside the first piston rod 11 or the second oil channel 14 inside the second piston rod 12, thereby effectively saving installation space, reducing installation steps, and making it more convenient to disassemble and replace parts. At the same time, since the oil channel and the explosion-proof valve 4 are installed inside the piston rod 1, the oil channel is prevented from being easily deformed and failed by collision or extrusion, and is safer and more durable.

[0030] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present utility model. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model may be subject to various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An explosion-proof valve built-in anti-fall oil cylinder, comprising a piston rod (1) and a cylinder body (2) arranged on the piston rod (1), characterized in that: An oil passage is provided on the piston rod (1), an explosion-proof valve (4) is installed in the oil passage, a piston head (3) is provided on the piston rod (1), the piston head (3) divides the interior of the oil cylinder body (2) into a first cavity and a second cavity, the oil passage is provided with a first opening (16) and a second opening (17), the first opening (16) is located in the first cavity, and the second opening (17) is located in the second cavity.

2. The explosion-proof valve built-in anti-fall oil cylinder according to claim 1 is characterized in that: The piston rod (1) comprises a first piston rod (11) and a second piston rod (12); the first piston rod (11) is provided with a first oil passage (13); the second piston rod (12) is provided with a second oil passage (14); the first piston rod (11) and the second piston rod (12) are connected by a thread; after the first piston rod (11) and the second piston rod (12) are assembled, the first oil passage (13) and the second oil passage (14) are connected to form an oil passage.

3. The explosion-proof valve built-in anti-fall oil cylinder according to claim 2 is characterized in that: The end of the first piston rod (11) close to the second piston rod (12) is raised in the radial direction to form a piston head (3), and a groove is formed inwardly in the axial direction at the end of the first piston rod (11) close to the second piston rod (12), and a thread is provided on the inner wall of the groove. The end of the second piston rod (12) close to the first piston rod (11) is provided with an external thread, and the first piston rod (11) and the second piston rod (12) are connected by the thread and the external thread.

4. The explosion-proof valve built-in anti-fall oil cylinder according to claim 2 is characterized in that: The piston head (3) is annular and provided with an internal thread, the first piston rod (11) and the second piston rod (12) are both provided with an external thread, and the first piston rod (11) and the second piston rod (12) are connected via the piston head (3).

5. The explosion-proof valve built-in anti-fall oil cylinder according to claim 2 is characterized in that: The explosion-proof valve (4) is installed in the first oil passage (13) or the second oil passage (14).

6. The explosion-proof valve built-in anti-fall oil cylinder according to claim 5, characterized in that: The first oil passage (13) and the second oil passage (14) are provided with internal threaded holes, and the explosion-proof valve (4) is installed in the first oil passage (13) or the second oil passage (14) through threaded connection.

7. The explosion-proof valve built-in anti-fall oil cylinder according to claim 2, characterized in that: At least one limiting protrusion (15) is provided on the piston rod (1), and the limiting protrusion (15) is located on a side of the oil passage opening away from the piston head (3).

8. The explosion-proof valve built-in anti-fall oil cylinder according to claim 7, characterized in that: There are two limiting protrusions (15), and the two limiting protrusions (15) are respectively installed on the first piston rod (11) and the second piston rod (12).

9. The explosion-proof valve built-in anti-fall oil cylinder according to claim 7, characterized in that: The limiting protrusion (15) is an annular limiting protrusion (15).

10. The explosion-proof valve built-in anti-fall oil cylinder according to claim 1, characterized in that: A sealing ring is provided on the piston head (3).

Images