A hydraulic cylinder structure with a displacement sensor fixed on a piston rod

Abstract

A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod, comprising a cylinder bottom, a piston rod, a displacement sensor electronic compartment, a magnetic ring assembly and a magnetic ring fixing assembly that cooperate with each other; wherein, a stepped through hole is opened on the piston rod, the displacement sensor electronic compartment is fixed in the outer hole, the magnetic ring assembly is installed at one end of the inner hole, the magnetic ring assembly is fixed at one end of the magnetic ring fixing assembly, and the other end passes through the inner hole and is fixed to the cylinder bottom by bolts; the piston rod reciprocates, and the displacement sensor electronic compartment fixed to the piston rod reciprocates at the same time to obtain a displacement output, which is suitable for a hydraulic cylinder structure with a compact structure and a displacement sensor signal that needs to be led out from the piston rod.

Description

Technical field:

[0001] The utility model belongs to the technical field of hydraulic oil cylinders, and relates to a hydraulic cylinder design in which a displacement sensor is fixed on a piston rod, and is suitable for a hydraulic cylinder structure with a compact structure and in which a displacement sensor signal needs to be led out from the piston rod. Background technology:

[0002] The commonly used telescopic displacement sensor of hydraulic cylinder (hereinafter referred to as displacement sensor) is generally installed on the cylinder body. The displacement sensor cable is led out from the wire hole at the bottom of the cylinder, and the displacement sensor measuring rod is installed in the deep hole in the piston rod. The magnetic ring is fixed inside the piston rod and reciprocates with the piston rod. The displacement sensor uses non-contact measurement and control technology to accurately detect the absolute position of the active magnetic ring to measure the actual displacement value of the detected product.

[0003] However, due to the special installation structure of some oil cylinders, the sensor signal needs to be led out from the piston rod, and a new sensor installation form needs to be designed to meet the needs. That is, the magnetic ring needs to be fixed on the cylinder body and the sensor needs to be installed on the piston rod, instead of the conventional method of fixing the magnetic ring inside the piston rod and installing the sensor on the cylinder body. This technology has not yet appeared in the prior art. Utility model content:

[0004] In view of the above problems in the prior art, the utility model provides a hydraulic cylinder with a displacement sensor fixed on a piston rod, which is suitable for a hydraulic cylinder structure with a compact structure and in which the displacement sensor signal needs to be led out from the piston rod.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod, comprising a cylinder bottom, a piston rod, a displacement sensor electronic compartment, a magnetic ring assembly and a magnetic ring fixing assembly that cooperate with each other; wherein, a stepped through hole is opened on the piston rod, the displacement sensor electronic compartment is fixed in the outer hole, the magnetic ring assembly is installed at one end of the inner hole, the magnetic ring fixing assembly fixes the magnetic ring assembly at one end, and the other end passes through the inner hole and is fixed to the cylinder bottom by bolts; the piston rod reciprocates, and the displacement sensor electronic compartment fixed to the piston rod reciprocates at the same time to obtain a displacement output.

[0007] Furthermore, the magnetic ring assembly includes a magnetic ring, and non-magnetic gaskets are respectively installed on both sides of the magnetic ring.

[0008] Furthermore, the magnetic ring assembly includes a magnetic ring, and two copper rings are respectively installed on both sides of the magnetic ring.

[0009] Furthermore, the magnetic ring fixing assembly includes a magnetic ring mounting end cover, a magnetic ring mounting sleeve and a magnetic ring mounting flange that cooperate with each other; wherein the magnetic ring mounting end cover, the magnetic ring mounting sleeve and the magnetic ring mounting flange are assembled in sequence to form an integrated structure, the magnetic ring assembly is installed and fixed in the magnetic ring mounting end cover, and a group of oil holes are opened on the wall of the magnetic ring mounting sleeve.

[0010] Furthermore, the magnetic ring mounting end cover, the magnetic ring mounting sleeve and the magnetic ring mounting flange are welded together. After the magnetic ring assembly is installed, the three locations of the magnetic ring mounting end cover are evenly fixed by knocking and flanging.

[0011] By adopting the above technical scheme, the utility model is applied to a hydraulic cylinder structure in which the sensor signal needs to be led out from the piston rod. This structure requires a stepped through hole to be opened on the piston rod, with a displacement sensor fixed at one end and a magnetic ring fixing assembly designed at the other end to fix the magnetic ring. The magnetic ring fixing assembly is welded together by a magnetic ring mounting sleeve, a magnetic ring mounting end cover, and a magnetic ring mounting flange. The magnetic ring and two copper rings are assembled in the magnetic ring fixing assembly, and the magnetic ring fixing assembly is fixed to the bottom of the cylinder by bolts and installed in the deep hole of the piston rod. When the piston rod reciprocates, the sensor electronic compartment fixed to the piston rod also reciprocates at the same time, thereby obtaining a displacement output. Description of the drawings:

[0012] The following is a detailed description of the utility model with accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure installation of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the magnetic ring fixing assembly of the present invention;

[0015] Figure 3 This is a schematic diagram of the piston rod of the utility model being stretched to the limit position. Specific implementation method:

[0016] The utility model is described in detail below with reference to the accompanying drawings and embodiments:

[0017] Figure 1-3 Shown is an embodiment of the utility model.

[0018] A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod, comprising a cylinder bottom 1, a piston rod 2, a displacement sensor electronic compartment 3, a magnetic ring assembly 4 and a magnetic ring fixing assembly 5 which cooperate with each other; wherein a stepped through hole is opened on the piston rod 2, the displacement sensor electronic compartment 3 is fixed in the outer hole 21, the magnetic ring assembly 4 is installed at one end of the inner hole 22, the magnetic ring fixing assembly 5 fixes the magnetic ring assembly 4 at one end, and the other end passes through the inner hole 33 and is fixed to the cylinder bottom 1 by bolts 6; the piston rod 2 reciprocates, and the displacement sensor electronic compartment 3 fixed to the piston rod 2 reciprocates at the same time to obtain a displacement output.

[0019] In a specific embodiment, the magnetic ring assembly 4 includes a magnetic ring 41, and non-magnetic gaskets are installed on both sides of the magnetic ring. Alternatively, two copper rings 42 are installed on both sides of the magnetic ring 41.

[0020] Furthermore, the magnetic ring fixing assembly 5 includes a magnetic ring mounting end cover 51, a magnetic ring mounting sleeve 52, and a magnetic ring mounting flange 53 that cooperate with each other; wherein the magnetic ring mounting end cover 51, the magnetic ring mounting sleeve 52, and the magnetic ring mounting flange 53 are assembled in sequence to form an integrated structure, the magnetic ring assembly 4 is installed and fixed in the magnetic ring mounting end cover 51, and a group of oil holes 521 are opened on the wall of the magnetic ring mounting sleeve 52.

[0021] Specifically, the magnetic ring mounting end cover 51, the magnetic ring mounting sleeve 52, and the magnetic ring mounting flange 53 are welded together. After the magnetic ring assembly 4 is installed, the three locations of the magnetic ring mounting end cover are evenly fixed by knocking and flanging.

[0022] The utility model is applied to a hydraulic cylinder structure in which the sensor signal needs to be led out from the piston rod. This structure requires a stepped through hole to be opened on the piston rod, a displacement sensor is fixed at one end, and a magnetic ring fixing assembly is designed at the other end to fix the magnetic ring. The magnetic ring fixing assembly is welded together by a magnetic ring mounting sleeve, a magnetic ring mounting end cover, and a magnetic ring mounting flange. The magnetic ring and two copper rings are assembled in the magnetic ring fixing assembly, and the magnetic ring fixing assembly is fixed to the cylinder bottom by bolts and installed in the deep hole of the piston rod. When the piston rod reciprocates, the sensor electronic compartment fixed to the piston rod reciprocates at the same time, thereby obtaining a displacement output.

[0023] The magnetic ring mounting assembly is fixed to the cylinder bottom through bolts in the deep hole of the piston hole. The electronic compartment of the displacement sensor and the piston rod reciprocate simultaneously to obtain the displacement output, meeting the requirement of leading the displacement signal from the piston rod.

[0024] When the piston rod is stretched to the limit position (such as Figure 3 ) At this time, the rodless chamber including the inner hole of the magnetic ring fixing assembly fixed on the cylinder body is filled with hydraulic oil. At this time, the rod chamber is pressurized, and the piston rod and the measuring rod are retracted together. During the retraction process, the oil in the inner hole of the magnetic ring fixing assembly will form a certain resistance to the measuring rod. In order to prevent the measuring rod from bending due to force and to ensure the smooth operation of the measuring rod, a group of small holes need to be opened on the oil pipe of the magnetic ring fixing assembly so that the oil in the oil pipe can be smoothly discharged into the rodless chamber.

[0025] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod, characterized in that: It includes a cylinder bottom, a piston rod, a displacement sensor electronic compartment, a magnetic ring assembly and a magnetic ring fixing assembly that cooperate with each other; wherein, a stepped through hole is opened on the piston rod, the displacement sensor electronic compartment is fixed in the outer hole, the magnetic ring assembly is installed at one end of the inner hole, the magnetic ring assembly is fixed at one end of the magnetic ring fixing assembly, and the other end passes through the inner hole and is fixed to the cylinder bottom by bolts; the piston rod reciprocates, and the displacement sensor electronic compartment fixed to the piston rod reciprocates at the same time to obtain displacement output.

2. A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod as claimed in claim 1, characterized in that: The magnetic ring assembly comprises a magnetic ring, and non-magnetic gaskets are respectively installed on both sides of the magnetic ring.

3. A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod as claimed in claim 1, characterized in that: The magnetic ring assembly comprises a magnetic ring, and two copper rings are respectively installed on both sides of the magnetic ring.

4. A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod as claimed in claim 1, 2 or 3, characterized in that: The magnetic ring fixing assembly includes a magnetic ring mounting end cover, a magnetic ring mounting sleeve and a magnetic ring mounting flange that cooperate with each other; wherein the magnetic ring mounting end cover, the magnetic ring mounting sleeve and the magnetic ring mounting flange are assembled in sequence to form an integrated structure, the magnetic ring assembly is installed and fixed in the magnetic ring mounting end cover, and a group of oil holes are opened on the wall of the magnetic ring mounting sleeve.

5. A hydraulic cylinder structure in which a displacement sensor is fixed on a piston rod as claimed in claim 4, characterized in that: The magnetic ring mounting end cover, the magnetic ring mounting sleeve and the magnetic ring mounting flange are welded together. After the magnetic ring assembly is installed, the three locations of the magnetic ring mounting end cover are evenly fixed by knocking and flanging.

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