A multi-stage telescopic oil cylinder

Abstract

The utility model discloses a multistage telescopic oil cylinder, including multistage oil cylinder body, lower fixed base, upper fixed base and anti -twist guide rod, its characterized in that: the uppermost end cylinder head of multistage oil cylinder body is connected with upper fixed base, and this multistage oil cylinder body is fixedly installed on lower fixed base, and the fixed installation of upper fixed base and lower fixed base is not less than two anti -twist guide rods, and the anti -twist guide rod is the multistage telescopic rod same as the laminated series of multistage oil cylinder body, and the fixed connection of the every level pole head of multistage telescopic rod and the every level cylinder head of multistage oil cylinder body has the connecting plate, and the utility model discloses the same multistage guide rod with multistage oil cylinder body, realizes the cylinder head anti -twist of oil cylinder, and further realizes the effect of stable connection through the connecting plate.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinders, and more specifically, to a multi-stage telescopic cylinder. Background Technology

[0002] In the current market, multi-stage hydraulic cylinders are generally composed of two or more stages of piston cylinders, also known as telescopic cylinders. They are usually used in applications with limited space but long strokes. The working principle of a multi-stage hydraulic cylinder is as follows: when oil enters through the rod chamber port and returns through the rodless chamber port, the oil flows through the pipe into the oil chamber, first pushing the first-stage piston with a larger effective working area, then pushing the second-stage piston with a smaller effective working area, and so on, to achieve multi-stage telescopic function. However, during use, multi-stage cylinders may experience cylinder head twisting, which is not conducive to use.

[0003] For example, the utility model patent with application number CN202370934U and application name is a multi-stage hydraulic cylinder, which has a case where the cylinder head is twisted. Utility Model Content

[0004] The main objective of this invention is to provide a multi-stage telescopic hydraulic cylinder, comprising a multi-stage cylinder body, a lower fixed seat, an upper fixed seat, and anti-torsion guide rods. The uppermost cylinder head of the multi-stage cylinder body is connected to the upper fixed seat. The multi-stage cylinder body is fixedly mounted on the lower fixed seat. At least two anti-torsion guide rods are fixedly installed between the upper fixed seat and the lower fixed seat. The anti-torsion guide rods are multi-stage telescopic rods with the same number of stacked stages as the multi-stage cylinder body. Each stage head of the multi-stage telescopic rod is fixedly connected to each stage cylinder head of the multi-stage cylinder body by a connecting plate.

[0005] Furthermore, the connecting plate is provided with a first through hole for connecting to the multi-stage cylinder body and a second through hole for connecting to the anti-torsion guide rod.

[0006] Furthermore, a reinforcing sleeve is provided at the lower part of both the first through hole and the second through hole.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses the same multi-stage guide rods as the multi-stage cylinder body to prevent cylinder head torsion, and further achieves a stable connection through the connecting plate. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0009] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0010] Figure 3 This is a three-dimensional structural diagram of the connecting plate of this utility model.

[0011] Reference numerals in the attached drawings: 1. Multi-stage cylinder body; 2. Lower fixed seat; 3. Upper fixed seat; 4. Anti-torsion guide rod; 5. Connecting plate; 6. First through hole; 7. Second through hole; 8. Reinforcing sleeve. Detailed Implementation

[0012] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention. Example

[0013] See Figure 1-3 As shown, a multi-stage telescopic hydraulic cylinder includes a multi-stage cylinder body, a lower fixed seat, an upper fixed seat, and anti-torsion guide rods. The uppermost cylinder head of the multi-stage cylinder body is connected to the upper fixed seat. The multi-stage cylinder body is fixedly installed on the lower fixed seat. At least two anti-torsion guide rods are fixedly installed between the upper fixed seat and the lower fixed seat. The anti-torsion guide rods are multi-stage telescopic rods with the same number of stacked stages as the multi-stage cylinder body. Each stage head of the multi-stage telescopic rod is fixedly connected to each stage cylinder head of the multi-stage cylinder body with a connecting plate.

[0014] The connecting plate is provided with a first through hole for connecting to the multi-stage cylinder body and a second through hole for connecting to the anti-torsion guide rod.

[0015] Both the first through hole and the second through hole are provided with reinforcing sleeves at their lower parts.

[0016] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A multi-stage telescopic hydraulic cylinder, comprising a multi-stage cylinder body, a lower fixed seat, an upper fixed seat, and an anti-torsion guide rod, characterized in that: The uppermost cylinder head of the multi-stage cylinder body is connected to an upper fixed seat. The multi-stage cylinder body is fixedly installed on a lower fixed seat. At least two anti-torsion guide rods are fixedly installed between the upper fixed seat and the lower fixed seat. The anti-torsion guide rods are multi-stage telescopic rods with the same number of stacked stages as the multi-stage cylinder body. Each stage of the multi-stage telescopic rod is fixedly connected to each stage cylinder head of the multi-stage cylinder body with a connecting plate.

2. The multi-stage telescopic hydraulic cylinder according to claim 1, characterized in that: The connecting plate is provided with a first through hole for connecting to the multi-stage cylinder body and a second through hole for connecting to the anti-torsion guide rod.

3. A multi-stage telescopic hydraulic cylinder according to claim 2, characterized in that: Both the first through hole and the second through hole are provided with reinforcing sleeves at their lower parts.

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