A cushioned hydraulic cylinder

Abstract

The application relates to a buffer hydraulic cylinder, which comprises a cylinder body, a piston rod in sealed sliding connection with the cylinder body and provided with a hollow, a buffer spring fixedly connected at one end with the outer wall of the cylinder body and at the other end with the piston rod. The hollow of the piston rod reduces the weight of the piston rod, thereby reducing the motion inertia, making the oil cylinder start and stop more quickly and respond more sensitively. Meanwhile, the buffer hydraulic cylinder can be applied to high-frequency or high-speed working conditions, and the purpose of reducing the driving energy consumption of the buffer hydraulic cylinder is achieved.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic cylinder manufacturing, and in particular to a buffer hydraulic cylinder. Background Technology

[0002] A buffer hydraulic cylinder is a type of hydraulic cylinder that has a deceleration and buffering function at the end of its stroke. It is used to prevent the piston and cylinder from vibrating, making noise, or being mechanically damaged due to high-speed impact at the end of the stroke.

[0003] In related technologies, such as Chinese patent publication number CN203333249U, a buffer hydraulic cylinder is proposed, which includes: an oil guide port and an oil outlet on the cylinder body; plugs and guide sleeves at both ends of the cylinder body; a connecting rod that cooperates with the guide sleeve; and a piston that cooperates with the cylinder body at one end of the connecting rod. The key feature is that a chamfer is provided on the force-bearing end face of the piston. The advantage of this invention is that it reduces the direct impact of hydraulic oil on the piston, thereby reducing the vibration and improving the stability and safety of the forklift during operation.

[0004] The aforementioned technologies have the following drawbacks: when the buffer hydraulic cylinder is used in high-frequency or high-speed motion conditions, the energy consumption of the buffer hydraulic cylinder drive is high. Utility Model Content

[0005] To reduce the high energy consumption of buffer cylinders, this application provides a buffer hydraulic cylinder.

[0006] This application provides a buffer pressure cylinder, which adopts the following technical solution:

[0007] A buffer pressure cylinder, comprising:

[0008] Cylinder block;

[0009] The piston rod slides in a sealed manner with the cylinder body, and the piston rod is hollow.

[0010] The buffer spring is fixedly connected at one end to the outer wall of the cylinder body and at the other end to the piston rod.

[0011] Furthermore, the cylinder block includes:

[0012] Sealing section;

[0013] The connecting section is arranged in a ring shape and is fixedly connected to the sealing section;

[0014] The sliding section is fixedly connected to the side of the connecting section opposite to the sealing section, and the sliding section is sealed and slidably connected to the piston rod.

[0015] Furthermore, the piston rod includes:

[0016] The contact section is located inside the cylinder and slides against the inner wall of the connecting section.

[0017] The connecting section is fixedly connected to the contacting section and also has a sealed sliding connection with the sliding section.

[0018] The working section is fixedly connected to the connecting section and extends beyond the sliding section.

[0019] Furthermore, a one-way valve is connected to the connecting section so that the oil can flow into the cylinder through the one-way valve.

[0020] Furthermore, a guide ring is provided on the contact section.

[0021] Furthermore, a connecting block is fixedly connected to the contact section, and the connecting block and the side wall of the connecting section are spaced apart to form a receiving groove. A buffer block that engages with the receiving groove is fixedly connected to the sliding section.

[0022] Furthermore, a connecting hole is provided on the side wall of the connecting section, the one-way valve is located at the connecting hole, and the end of the contact section away from the sealing section extends beyond the side wall of the connecting hole near the sealing section.

[0023] In summary, the beneficial technical effects of this application are as follows:

[0024] 1. The piston rod cavity design reduces the weight of the piston rod, thereby reducing motion inertia and making the hydraulic cylinder start and stop more quickly and respond more sensitively; at the same time, it enables the hydraulic cylinder to be used in high-frequency or high-speed conditions and reduces the driving energy consumption of the hydraulic cylinder.

[0025] 2. The one-way valve allows hydraulic oil to enter the cylinder and lubricate the movement trajectory of the sliding contact section. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Reference numerals: 100, cylinder body; 110, sealing section; 111, receiving groove; 120, connecting section; 130, sliding section; 131, ring body; 140, clearance; 200, piston rod; 210, contact section; 211, guide ring; 212, connecting block; 213, receiving groove; 214, buffer block; 215, connecting groove; 220, connecting section; 221, connecting hole; 222, one-way valve; 230, working section; 300, buffer spring. Detailed Implementation

[0028] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] This application discloses a buffer pressure cylinder. (Refer to...) Figure 1 The buffer pressure cylinder includes a cylinder body 100, a piston rod 200, and a buffer spring 300.

[0030] The cylinder body 100 includes a sealing section 110, a connecting section 120, and a sliding section 130. A receiving groove 111 is formed on one side of the sealing section 110. The connecting section 120 is annular and engages with the receiving groove 111 of the sealing section 110. The sealing section 110 and the connecting section 120 are welded together. A channel for the piston rod 200 to pass through is formed on the sliding section 130. An annular body 131 is integrally formed on the outer peripheral wall of the sliding section 130. The side of the annular body 131 near the sealing section 110 abuts against the end face of the connecting section 120 opposite to the sealing section 110 and is fixedly connected to the connecting section 120 by multiple bolts. This allows the sliding section 130 to partially insert into the connecting section 120. Multiple sealing rings are provided on the portion of the sliding section 130 located within the connecting section 120, and all sealing rings abut against the inner wall of the connecting section 120. In this embodiment, two sealing rings are provided, and the two sealing rings are arranged axially along the connecting section 120. In this embodiment, multiple bolts are evenly distributed circumferentially along the connecting section 120. The split design of the cylinder body 100 facilitates disassembly by workers, thereby facilitating maintenance of the piston rod 200 or replacement of damaged parts of the cylinder body 100.

[0031] The piston rod 200 includes an abutting section 210, a connecting section 220, and a working section 230. The abutting section 210 is annular and located within the connecting section 120, slidingly connected to the inner wall of the connecting section 120. A connecting groove 215 is formed on the inner wall of the abutting section 210 along its circumference. The connecting section 220 is annular and located within the connecting section 120, engaging with the connecting groove 215 and being welded to the side wall of the connecting groove 215. The connecting section 220 is sealed and slidingly connected to the sliding section 130, and a sealing ring is fixedly connected to the side wall of the sliding section 130 near the connecting section 220. The working section 230 is welded to the connecting section 220 away from the abutting section 210. The connecting section 220, the abutting section 210, and the working section 230 together form a cavity. The sliding section 130, the connecting section 220, the abutting section 210 and the connecting section 120 enclose and form a gap.

[0032] The buffer spring 300 is sleeved on the outside of the cylinder body 100, and one end of the buffer spring 300 is fixedly connected to the working section 230, and the other end is fixedly connected to the connecting section 120.

[0033] In order to guide the sliding of the piston rod 200, two annular grooves are provided on the outer wall of the contact section 210, and a guide ring 211 is fixedly connected in each of the two annular grooves.

[0034] To improve the buffering effect of the buffer pressure cylinder, a connecting block 212 is fixedly connected to one end of the contact section 210 near the working section 230, and the connecting block 212 is annular. The inner wall of the connecting block 212 and the side wall of the connecting section 220 are spaced apart to form a receiving groove 213, and a buffer block 214 that engages with the receiving groove 213 is fixedly connected to the sliding section 130.

[0035] The connecting section 220 has a connecting hole 221 that communicates with the gap 140, and a one-way valve 222 is provided in the connecting hole 221 so that the hydraulic oil in the piston rod 200 cavity can flow into the gap 140 through the one-way valve 222. The end of the contact section 210 that is away from the sealing section 110 extends beyond the side wall of the connecting hole 221 near the sealing section 110.

[0036] The implementation principle of a buffer hydraulic cylinder in this application embodiment is as follows: when hydraulic oil enters the cylinder body 100 and enters the cavity of the piston rod 200, it pushes the piston rod 200 out of the cylinder body 100. During the operation of the piston rod 200, some hydraulic oil enters the gap, thereby lubricating the sliding of the piston rod 200.

[0037] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A buffer pressure cylinder, characterized in that, include: Cylinder block (100); The piston rod (200) slides in a sealed manner with the cylinder body (100), and the piston rod (200) is hollow. The buffer spring (300) is fixedly connected at one end to the outer wall of the cylinder (100) and at the other end to the piston rod (200).

2. A buffer pressure cylinder according to claim 1, characterized in that, The cylinder block (100) includes: Sealing section (110); The connecting section (120) is arranged in a ring shape, and the connecting section (120) is fixedly connected to the sealing section (110); The sliding section (130) is fixedly connected to the side of the connecting section (120) away from the sealing section (110), and the sliding section (130) is sealed and slidingly connected to the piston rod (200).

3. A buffer pressure cylinder according to claim 2, characterized in that, The piston rod (200) includes: The contact section (210) is located inside the cylinder (100) and is slidably connected to the inner wall of the connecting section (120); The connecting section (220) is fixedly connected to the contact section (210) and is sealed and slidably connected to the sliding section (130); The working section (230) is fixedly connected to the connecting section (220) and extends beyond the sliding section (130).

4. A buffer pressure cylinder according to claim 3, characterized in that, A one-way valve (222) is connected to the connecting section (220) so that oil can flow into the cylinder (100) through the one-way valve (222).

5. A buffer pressure cylinder according to claim 3, characterized in that, A guide ring (211) is provided on the contact section (210).

6. A buffer pressure cylinder according to claim 5, characterized in that, A connecting block (212) is fixedly connected to the contact section (210), and the connecting block (212) and the side wall of the connecting section (220) are spaced apart to form a receiving groove (213). A buffer block (214) that engages with the receiving groove (213) is fixedly connected to the sliding section (130).

7. A buffer pressure cylinder according to claim 4, characterized in that, A connecting hole (221) is provided on the side wall of the connecting section (220), and the one-way valve (222) is located at the connecting hole (221). The end of the contact section (210) away from the sealing section (110) extends beyond the side wall of the connecting hole (221) near the sealing section (110).

Images