KR-20260063072-A - Hydraulic cylinder buffer performance test device

Abstract

The present invention relates to a hydraulic cylinder damping performance test device, and more specifically, comprises: a test bed on which a hydraulic cylinder is placed; a fixed bracket placed on the upper part of the test bed and to which one end of the hydraulic cylinder is connected; a movable bracket movably provided on the upper part of the test bed and connected to a rod end placed on the other side of the inlet cylinder; an actuator placed on the test bed and for operating the movable bracket to apply a load to the hydraulic cylinder; a precision displacement sensor mounted on one side of the test bed and for measuring the deceleration of the hydraulic cylinder according to the load applied through the actuator; and an adjustment jig placed on the test bed for adjusting centering when the rod of the hydraulic cylinder and the movable bracket are coupled. In other words, the present invention proposes a hydraulic cylinder damping performance testing device that can obtain reliable test results by measuring the deceleration rate of a hydraulic cylinder under test using a precision displacement sensor, and can improve economic efficiency through structural simplification of the testing device by being implementable with only a simple installation of the precision displacement sensor.

Inventors

• 윤각진
• 김길호
• 윤홍민
• 홍성호
• 이승현

Assignees

• 주식회사 유응연

Dates

Publication Date

20260507

Application Date

20241030

Claims (7)

1. A testbed where hydraulic cylinders are placed; A fixed bracket positioned on the upper part of the above testbed and to which one end of the above hydraulic cylinder is connected; A movable bracket movably provided on the upper part of the above testbed and connected to a rod end positioned on the other side of the inflow cylinder; An actuator placed on the above testbed and for operating the above movable bracket to apply a load to the above hydraulic cylinder; A precision displacement sensor mounted on one side of the testbed and for measuring the deceleration of the hydraulic cylinder according to the load applied through the actuator; and An adjustment jig for adjusting centering when coupled between the rod of the hydraulic cylinder and the movable bracket, placed on the above testbed; A hydraulic cylinder damping performance test device comprising
2. In claim 1, the fixing bracket is The bracket body and, A connecting part connected to the upper part of the above bracket body and protruding upward, and A second coupling hole formed in the above coupling portion and formed to correspond to a first coupling hole formed in the rod end of the hydraulic cylinder, and A hydraulic cylinder damping performance test device characterized by comprising a first coupling hole and a fixing pin inserted into the second coupling hole of the hydraulic cylinder.
3. In Article 2, A hydraulic cylinder damping performance testing device characterized by the above-described adjustment jig being connected to a movable bracket to finely adjust the center between the first coupling hole, the second coupling hole, and the fixing pin of the hydraulic cylinder.
4. In claim 3, the adjustment jig is A first connecting block coupled to the main body of the above-mentioned movable bracket, and A second connecting block coupled to the first connecting block, and A hydraulic cylinder damping performance test device characterized by comprising a control unit coupled to the second connecting block and configured to adjust the fine displacement of the movable bracket through the first connecting block.
5. In claim 4, the adjustment part A nut block formed in the second connecting block above, and A screw rod coupled to the above nut block, and A hydraulic cylinder damping performance test device characterized by being mounted on the above testbed and comprising an operating part connected to both ends of the screw rod to rotate the screw rod.
6. In claim 5, the above operating part A gearbox mounted on one side of the above testbed and connected to both ends of the screw rod, and A hydraulic cylinder damping performance testing device characterized by including a control lever connected to the gearbox to rotate the screw rod.
7. In Article 4, A hydraulic cylinder damping performance testing device characterized by further including a hinge joint that connects the first connecting block and the second connecting block and enables the first connecting block to be attached or detached from the bracket body of the movable bracket.

Description

Hydraulic cylinder buffer performance test device The present invention relates to a hydraulic cylinder damping performance test device that can obtain reliable test results by measuring the deceleration rate of a hydraulic cylinder under test using a precision displacement sensor, and can improve economic efficiency through structural simplification of the test device by being implementable with only a simple installation of the precision displacement sensor. Generally, a hydraulic cylinder is a type of important mechanical element that utilizes hydraulic force generated by a hydraulic pump to inject fluid into the cylinder, and when the injected hydraulic force pushes the piston to move, this movement is transmitted to a rod to generate mechanical reciprocating motion. Hydraulic cylinders of this type are installed and used in various equipment, including aerial work platforms used for working at high altitudes above the ground, as well as forklifts and excavators. These hydraulic cylinders operate by extending or compressing the cylinder rod, and work is performed as this motion is repeated. When the cylinder rod is extended and compressed, the piston reciprocates within the cylinder body, and cushion sections exist on both sides inside the cylinder body where the piston's movement stops after deceleration. The cushioning performance of a hydraulic cylinder is determined by observing the shape of the graph or the deceleration rate according to the pressure and time acting on the hydraulic cylinder during operation. However, in this conventional method of testing the damping performance of a hydraulic cylinder, the measurement is taken while the cylinder rod moves back and forth, and at this time, about 30 to 50 tons of hydraulic pressure is applied to the cylinder body, and accordingly, the cylinder body moves due to the force of the supplied hydraulic pressure. Previously, the deceleration rate of hydraulic cylinders was measured by visually inspecting the cylinder or by installing a separate oscilloscope. Visual inspection presents the problem of difficulty in precise measurement, while installing a separate oscilloscope incurs additional costs due to the need to install additional equipment. FIG. 1 is a one-sided perspective view showing a hydraulic cylinder cushioning performance test device according to the present invention, FIG. 2 is a side view showing a hydraulic cylinder cushioning performance test device according to the present invention, FIG. 3 is a second perspective view showing a hydraulic cylinder cushioning performance test apparatus according to the present invention. FIG. 4 is another side view showing a hydraulic cylinder cushioning performance test apparatus according to the present invention, FIG. 5 is a perspective view showing an adjustment jig of a hydraulic cylinder damping performance test device according to the present invention. FIG. 6 is a perspective view showing the operating part of an adjustment jig in a hydraulic cylinder cushioning test device according to the present invention. FIG. 7 is a perspective view showing the combined state between an actuator and a movable bracket in a hydraulic cylinder damping performance test apparatus according to the present invention. In order to explain the operational advantages of the present invention and the objectives achieved by the implementation of the present invention, preferred embodiments of the present invention are illustrated below and examined with reference thereto. First, the terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention; singular expressions may include plural expressions unless the context clearly indicates otherwise. Furthermore, in this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted. As illustrated in FIGS. 1 to 7, the hydraulic cylinder damping performance test device according to the present invention comprises a test bed (10), a fixed bracket (20), a movable bracket (30), an actuator (40), a precision displacement sensor (50), and an adjustment jig (60). As illustrated in FIGS. 1 to 4, the testbed (10) according to the present invention is configured to function as a base frame (11) for a fixed bracket (20), a movable bracket (30), an actuator (40), a precision displacement sensor (50), and an adjustment jig (60). The testbed (10) is provided with a base frame (11) having a predetermined length, and a pair o