A hydraulic column extension and contraction monitoring device

Abstract

This utility model discloses a hydraulic column expansion and contraction monitoring device, relating to the field of displacement monitoring technology. It includes a displacement sensor, a measuring mechanism, and a mounting mechanism. The mounting mechanism includes a protective shell, a mounting bracket, and a clamp. The displacement sensor is fixedly mounted inside the protective shell. The measuring mechanism passes through the protective shell and is connected to the displacement sensor inside the protective shell. One end of the mounting bracket is fixedly connected to the outside of the protective shell, and the other end is fixedly connected to the outside of the clamp. The measuring mechanism includes a support tube and a telescopic tube. The telescopic tube is sleeved inside the support tube and can slide axially within the support tube. By meshing a rack at the end of the telescopic tube with a gear on the displacement sensor's rotating shaft, the problem of monitoring the expansion and contraction of the hydraulic column in confined spaces is solved.

Description

Technical Field

[0001] This utility model relates to the field of displacement monitoring technology, and in particular to a hydraulic column extension and contraction monitoring device. Background Technology

[0002] Hydraulic cylinders, as important actuators, play a crucial role in numerous fields such as industrial production, construction, and transportation. In industrial manufacturing, hydraulic cylinders are commonly used for power output and motion execution in various mechanical equipment. For example, injection molding machines use hydraulic cylinders to open and close molds and perform plastic injection molding. In the construction industry, hydraulic cylinders support large construction equipment, assist in the lifting and lowering of aerial work platforms, and the precise hoisting of building materials. In transportation, vehicle lifting systems rely on hydraulic cylinders to facilitate loading and unloading of goods and vehicle maintenance. Their working principle is based on Pascal's Law; through the pressure transmission of hydraulic oil, a piston is driven to reciprocate linearly within a cylinder, thereby achieving extension and retraction to meet the force and displacement requirements under different working conditions.

[0003] Precise control of the extension and retraction of hydraulic cylinders is crucial. In precision machining equipment, even slight deviations in the extension and retraction of hydraulic cylinders can lead to out-of-tolerance dimensional accuracy, reducing product quality and yield. In some applications with extremely high safety requirements, such as ground simulation testing equipment in the aerospace field, uncontrolled extension and retraction of hydraulic cylinders can cause serious safety accidents. However, there are still many problems to be solved in the control and monitoring of hydraulic cylinder extension and retraction.

[0004] Existing technologies for measuring the extension and retraction of hydraulic cylinders often fall short of meeting the increasingly demanding production requirements. For example, some measurement methods using stroke sensors suffer from significant limitations in accuracy and reliability under complex working environments such as high pressure and strong vibration. Taking hydraulic supports in coal mines as an example, the internal pressure is typically above 40 MPa, making it difficult for existing stroke sensors to accurately measure the extension and retraction of the hydraulic cylinder under these conditions. While some methods using wire sensors deployed externally to the hydraulic cylinder achieve stroke measurement to a certain extent, they are prone to rope breakage and damage in the complex environment of coal mines, making stable and reliable operation impossible. Using infrared ranging to measure the stroke of hydraulic cylinders requires installing infrared transmitting and receiving devices at both ends of the hydraulic support. Due to the compact structure of underground coal mine hydraulic supports, limited installation space, and the susceptibility of obstacles to obstructing the installation of these devices, this method faces numerous challenges in practical applications.

[0005] To address the above issues, there is an urgent need for a hydraulic column extension / retraction monitoring device that can safely, stably, and accurately monitor the extension / retraction of the hydraulic column in confined spaces. Utility Model Content

[0006] This invention provides a hydraulic column expansion and contraction monitoring device to solve the problem of monitoring the expansion and contraction of hydraulic columns in confined spaces.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A hydraulic column telescopic measurement device includes a displacement sensor, a measuring mechanism, and an installation mechanism. The installation mechanism includes a protective shell, a mounting bracket, and a clamp. The displacement sensor is fixedly installed inside the protective shell. The measuring mechanism passes through the protective shell and is connected to the displacement sensor inside the protective shell. One end of the mounting bracket is fixedly connected to the outside of the protective shell, and the other end is fixedly connected to the outside of the clamp. The measuring mechanism includes a support tube and a telescopic tube. The telescopic tube is sleeved inside the support tube and can slide along the axial direction of the support tube inside the support tube.

[0009] Furthermore, one end of the telescopic tube, which is sleeved inside the support tube, is connected to a rack, while the other end is a free end. A gear is connected to the displacement sensor's displacement shaft, and the rack and the gear mesh.

[0010] Furthermore, limiting blocks that cooperate with the rack are provided on both sides of the gear.

[0011] Furthermore, a bracket is provided at the free end of the telescopic tube, and a rotating component is provided on the bracket, which can rotate under the support of the bracket.

[0012] Furthermore, the bracket is a Y-shaped bracket, and the rotating component is a circular rotating component.

[0013] Furthermore, the clamp is circular.

[0014] Furthermore, the clamp is axially aligned with the support pipe.

[0015] Due to the adoption of the above technical solution, the technological progress achieved by this utility model is as follows:

[0016] 1. The linear telescopic motion of the hydraulic column is converted into the rotational motion of the gear by meshing the rack at the end of the telescopic tube with the gear on the shaft of the displacement sensor. The rotation angle is then measured by the displacement sensor to indirectly calculate the telescopic amount. The gear and rack transmission occupy little space and are easy to integrate into the protective housing, making them suitable for the narrow installation environment of the hydraulic column. The module and number of teeth of the gear and rack can be flexibly adjusted to adapt to different accuracy requirements.

[0017] 2. By setting limiting blocks on both sides of the gear that cooperate with the rack, the sliding trajectory of the rack is constrained, preventing the rack from deviating due to lateral force during movement, ensuring that the gear and the rack always maintain stable meshing, and avoiding measurement errors caused by transmission clearance.

[0018] 3. The free end of the telescopic tube is equipped with a rotatable rotating component via the bracket. The rotating component abuts against the hydraulic column support surface. The telescopic tube moves with the extension and retraction of the hydraulic column. The rotating component can rotate, which enhances the reliability of the monitoring device and prevents the measuring mechanism from being damaged by sudden compression.

[0019] 4. The clamp is axially aligned with the support pipe and is quickly fixed to the hydraulic column by clamping. It is compatible with different diameter specifications and simplifies the installation and debugging process. The protective shell integrates the displacement sensor and the measuring mechanism, providing dustproof, waterproof and impact-resistant protection, forming an independent modular structure that is easy to maintain and replace and adaptable to harsh industrial environments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of an embodiment of the present utility model;

[0022] Figure 2 This is a view of the internal structure of the protective shell according to an embodiment of the present utility model;

[0023] Figure 3 This is a partial structural view of the free end of the telescopic tube in an embodiment of this utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Displacement sensor, 2-Measuring mechanism, 3-Mounting mechanism, 4-Protective shell, 5-Mounting bracket, 6-Clamp, 7-Support tube, 8-Telescopic tube, 9-Rack, 10-Gear, 11-Limit block, 12-Bracket, 13-Rotating component. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, in the following description, specific details such as particular system structures and technologies are set forth for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art should understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details hindering the description of the present invention.

[0027] This utility model provides a hydraulic column extension / retraction monitoring device, as per the attached instruction manual. Figures 1 to 3 It can be known that:

[0028] Example 1

[0029] like Figure 1-2 As shown, a hydraulic column telescopic measurement device includes a displacement sensor 1, a measuring mechanism 2, and an installation mechanism 3. The installation mechanism 3 includes a protective shell 4, a mounting bracket 5, and a clamp 6. The displacement sensor 1 is fixedly installed inside the protective shell 4. The measuring mechanism 2 passes through the protective shell 4 and is connected to the displacement sensor 1 inside the protective shell 4. One end of the mounting bracket 5 is fixedly connected to the outside of the protective shell 4, and the other end is fixedly connected to the outside of the clamp 6. The measuring mechanism 2 includes a support tube 7 and a telescopic tube 8. The telescopic tube 8 is sleeved inside the support tube 7 and can slide axially along the support tube 7 inside the support tube 7. The displacement sensor 1 is a rotating shaft type, measuring displacement by rotating the shaft. The protective shell 4 is made of high-strength, corrosion-resistant materials, such as stainless steel or engineering plastics. The mounting bracket 5 is connected to the protective shell 4 and clamp 6 by welding, bolting, or other methods. The clamp 6 is customized according to the diameter of the hydraulic column and is made of a highly elastic metal material, such as spring steel. It is secured to the hydraulic column by tightening bolts or clips, ensuring a tight fit between the monitoring device and the hydraulic column, preventing relative displacement during the extension and retraction of the hydraulic column. The support tube 7 and the telescopic tube 8 are manufactured using high-precision machining processes, with a fit clearance between 0.05-0.1mm.

[0030] Furthermore, one end of the telescopic tube 8, which is sleeved inside the support tube 7, is connected to a rack 9, while the other end is a free end. A gear 10 is connected to the displacement shaft of the displacement sensor 1, and the rack 9 and gear 10 mesh. Through the meshing transmission of the rack 9 and gear 10, the linear displacement of the telescopic tube 8 is converted into the rotational motion of the displacement sensor 1 shaft, realizing the precise transmission and conversion of the displacement signal. This achieves high transmission accuracy and stability, accurately transmitting minute expansion and contraction changes of the hydraulic column to the displacement sensor 1, thus improving the accuracy of monitoring. The meshing clearance between the rack 9 and gear 10 is between 0.08-0.15mm to reduce impact and noise during transmission and improve the smoothness of transmission.

[0031] Furthermore, limiting blocks 11 that cooperate with rack 9 are provided on both sides of gear 10. The setting of limiting blocks 11 provides precise guidance for rack 9, ensuring that rack 9 always maintains linear movement during the sliding of telescopic tube 8, avoiding deviation or wobbling, thereby further improving the accuracy and stability of measurement.

[0032] like Figure 3 As shown, a bracket 12 is provided at the free end of the telescopic tube 8, and a rotating component 13 is provided on the bracket 12. The rotating component 13 can rotate under the support of the bracket.

[0033] Furthermore, the bracket 12 is a Y-shaped bracket, and the rotating component 13 is a circular rotating component. The bracket 12 is fixed to the free end of the telescopic tube 8 by welding or bolt connection, and the rotating component 13 can be a bearing connected to the bracket 12.

[0034] Furthermore, clamp 6 is circular. Clamp 6 matches the outer surface shape of the hydraulic column, providing a uniform clamping force to ensure a tight fit between the monitoring device and the hydraulic column, preventing relative displacement during the extension and retraction of the hydraulic column, thus improving installation stability and reliability. At the same time, clamp 6 has a simple structure, is easy to install and disassemble, and facilitates the installation, debugging, and maintenance of the monitoring device.

[0035] Furthermore, the clamp 6 and the support pipe 7 are axially aligned. The telescoping direction of the measuring mechanism 2 is the same as that of the hydraulic column, which improves the accuracy and reliability of the measurement and ensures that the displacement sensor 1 can accurately monitor the telescoping amount of the hydraulic column.

[0036] The workflow of this embodiment is as follows: When in use, clamp 6 is held around the outer shell of the hydraulic column base and fixed with bolts. At this time, the measuring mechanism 2 is axially aligned with the hydraulic column. The telescopic tube 8 is extended so that the free end rotating part 13 of the telescopic tube 8 abuts against the hydraulic column support surface. The data of displacement sensor 1 is reset or recorded. At this time, the telescopic tube 8 of the measuring mechanism 2 moves inside the support tube 7 as the hydraulic column extends and retracts. The gear 10 on the displacement sensor 1 rotates under the drive of the rack 9 connected to the telescopic tube 8, thereby calculating the amount of extension and retraction.

[0037] It should be noted that in this patent application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A hydraulic column extension / retraction monitoring device, characterized in that: The device includes a displacement sensor (1), a measuring mechanism (2), and a mounting mechanism (3). The mounting mechanism (3) includes a protective shell (4), a mounting bracket (5), and a clamp (6). The displacement sensor (1) is fixedly installed inside the protective shell (4). The measuring mechanism (2) passes through the protective shell (4) and is connected to the displacement sensor (1) inside the protective shell (4). One end of the mounting bracket (5) is fixedly connected to the outside of the protective shell (4), and the other end is fixedly connected to the outside of the clamp (6). The measuring mechanism (2) includes a support tube (7) and a telescopic tube (8). The telescopic tube (8) is sleeved inside the support tube (7) and can slide along the axial direction of the support tube (7) inside the support tube (7).

2. The hydraulic column extension / retraction monitoring device according to claim 1, characterized in that: The telescopic tube (8) is sleeved on the inner side of the support tube (7) and has a rack (9) connected to one end. The other end is a free end. The displacement sensor (1) has a gear (10) connected to its displacement shaft. The rack (9) and the gear (10) mesh.

3. The hydraulic column extension / retraction monitoring device according to claim 2, characterized in that: The gear (10) has limiting blocks (11) on both sides that cooperate with the rack (9).

4. A hydraulic column extension / retraction monitoring device according to claim 2 or 3, characterized in that: The telescopic tube (8) has a bracket (12) at its free end, and a rotating part (13) is provided on the bracket. The rotating part (13) can rotate under the support of the bracket (12).

5. The hydraulic column extension / retraction monitoring device according to claim 4, characterized in that: The bracket (12) is a Y-shaped bracket, and the rotating part (13) is a circular rotating part.

6. The hydraulic column extension / retraction monitoring device according to claim 1, characterized in that: The clamp (6) is circular.

7. A hydraulic column extension / retraction monitoring device according to claim 6, characterized in that: The clamp (6) is axially aligned with the support pipe (7).

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