Mounting device for dynamic pressure test of hydraulic buffer

Abstract

The utility model provides an installation device for a dynamic pressure test of a hydraulic buffer, the hydraulic buffer is provided with an oil injection hole, and one end of a pressure sensor is provided with an annular boss; the mounting device comprises a mounting seat and a sensor fastening nut; the upper part of the first through hole is a second internal thread hole section, and the middle part of the first through hole is a first unthreaded hole section; the outer wall of the annular boss is in interference fit with the inner wall of the first unthreaded hole section; the lower part of the mounting seat is in threaded fit with the oil injection hole; the sensor fastening nut is provided with a second through hole with the inner diameter smaller than the outer diameter of the annular boss, and the outer wall of the sensor fastening nut is provided with a second external thread. The installation device is simple in structure, the installation seat and the sensor fastening nut ensure that the pressure sensor can be fixedly and firmly installed on the hydraulic buffer, the outer wall of the annular boss is in interference fit with the inner wall of the first unthreaded hole section, the sealing effect is achieved, the structure of the hydraulic buffer is not damaged, and the service life of the hydraulic buffer is prolonged. The dynamic pressure in the hydraulic buffer is tested through the pressure sensor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sensor installation technical field, concretely relates to a kind of installation device of hydraulic damper dynamic pressure test. BACKGROUND

[0002] As damping component, hydraulic damper has the effect of buffering and damping, stable reset etc..Since hydraulic damper is a consumable part, the key sealing material is rubber product, easy to age, easy to damage.Daily maintenance, hydraulic damper is usually checked by visual inspection whether there is leakage situation.Internal seal state cannot be identified, there is the risk of damaged hydraulic damper not identified.

[0003] At present, for the pressure test of hydraulic damper, the test has not been carried out in the past, only rely on hydraulic damper structure design to ensure.Dynamical pressure sensor has higher accuracy and response speed, can accurately capture the dynamic response characteristics of damper.Therefore, to reduce the risk of damper failure not identified, it is necessary to install dynamical pressure sensor on hydraulic damper, for real-time monitoring of internal pressure of damper, timely inspection, monitoring the working state of hydraulic damper. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the technical problem that hydraulic damper cannot monitor internal pressure in real time in prior art, and provides a kind of installation device of hydraulic damper dynamic pressure test.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] A kind of installation device of hydraulic damper dynamic pressure test is provided, hydraulic damper has oil injection hole, oil injection hole has first internal thread, pressure sensor for pressure test has cylindrical main body, one end of main body is sensor sensing surface of pressure sensor, annular boss is set on main body close to pressure sensor sensing surface;Installation device includes mounting seat and sensor fastening nut;First through hole for sensor passing through is provided in mounting seat, the upper portion of first through hole is second internal thread hole section, middle part is first light hole section, lower part is second light hole section, and the diameter of first light hole section is equal to the diameter of second internal thread hole section, the diameter of first light hole section is greater than the diameter of second light hole section;The outer wall of annular boss is interference fit with the inner wall of first light hole section, the outer wall of mounting seat lower part has first external thread that is screwed with oil injection hole;Sensor fastening nut is provided with second through hole for sensor upper end passing through in the middle, the inner diameter of second through hole is less than the outer diameter of annular boss, and the outer wall of sensor fastening nut has second external thread that is matched with second internal thread hole section.

[0007] Further, the height of first external thread is shorter than the height of first internal thread.

[0008] Further, the height of the first outer thread is 1-2mm shorter than the height of the first inner thread.

[0009] Further, the distance from the lower surface of the annular boss to the sensing surface of the sensor is equal to the depth of the second light hole section.

[0010] Further, a first sealing ring is installed between the mounting seat and the oil injection hole.

[0011] Further, a second sealing ring is installed between the bottom surface of the annular boss and the upper end surface of the second light hole section.

[0012] Further, the upper end outer wall of the sensor fastening nut and the upper end outer wall of the mounting seat are both provided with a hexagonal protruding structure with a center line that is collinear with the central axis of the oil injection hole.

[0013] The advantages of the present utility model are:

[0014] The mounting device designed in the present utility model has a simple structure, is easy to process, easy to install and easy to replace. The mounting seat is designed in size and has a positioning mechanism, which ensures that the pressure sensor can be fixed and installed firmly on the hydraulic buffer. Meanwhile, the mounting seat has a stable structure and can effectively resist the influence of interference factors such as vibration and impact on the performance of the pressure sensor, so that the working performance of the pressure sensor is stable. The outer wall of the annular boss is in interference fit with the inner wall of the first light hole section, which plays a sealing role and enhances the overall sealing performance. The first outer thread of the mounting seat cooperates with the first inner thread, which can achieve the purpose of testing the internal dynamic pressure of the hydraulic buffer through the pressure sensor without damaging the structure of the hydraulic buffer. BRIEF DESCRIPTION OF DRAWINGS

[0015] The features and advantages of the present utility model will become more apparent through the following description with reference to the accompanying drawings, which are not drawn to scale and in which some features are exaggerated or minimized for the sake of clarity. In the drawings:

[0016] Figure 1 is an assembly explosion schematic diagram of the mounting device installing the pressure sensor to the hydraulic buffer in the embodiment of the present utility model;

[0017] Figure 2 is an assembly schematic diagram of the mounting device installing the pressure sensor to the hydraulic buffer in the embodiment of the present utility model;

[0018] Figure 3 is an assembly cross-sectional view of the mounting device installing the pressure sensor to the hydraulic buffer in the embodiment of the present utility model;

[0019] Figure 4 is a structural schematic diagram of the mounting seat in the embodiment of the present utility model;

[0020] Figure 5is a structural schematic view of the pressure sensor in the embodiment of the utility model;

[0021] Figure 6 is a structural schematic view of the sensor fastening nut in the embodiment of the utility model;

[0022] Figure 7 is a position relation diagram of the oil filling hole in the hydraulic buffer in the embodiment of the utility model;

[0023] In the drawing: 100 - mounting seat;110 - first through hole;111 - second internal thread hole section;112 - first light hole section;113 - second light hole section;200 - pressure sensor;210 - main body;220 - annular boss;230 - sensor sensing surface;300 - sensor fastening nut;310 - second through hole;400 - hydraulic buffer;410 - oil filling hole. DETAILED DESCRIPTION

[0024] The utility model will be described in detail by means of the exemplary embodiments of the utility model with reference to the drawings. It should be pointed out that the following detailed description of the utility model is for the purpose of illustration only, and not for limiting the utility model.

[0025] A kind of installation device of hydraulic buffer dynamic pressure test, as shown in Figure 7 Oil filling hole 410 has first internal thread, as shown in Figure 5 Pressure sensor 200 for pressure test has cylindrical main body 210, one end of main body 210 is the sensor sensing surface 230 of pressure sensor 200, annular boss 220 is arranged on the main body 210 close to the sensing surface of pressure sensor 200;As shown in Figure 1 Installation device includes mounting seat 100, sensor fastening nut 300.

[0026] As shown in Figure 1 First through hole 110 for sensor passing through is arranged in the middle of mounting seat 100, the upper portion of first through hole 110 is second internal thread hole section 111, the middle part is first light hole section 112, the lower part is second light hole section 113, and the diameter of first light hole section 112 is equal to the diameter of second internal thread hole section 111, the diameter of first light hole section 112 is greater than the diameter of second light hole section 113;Annular boss 220 outer wall and the inner wall of first light hole section 112 interference fit, the lower part outer wall of mounting seat 100 has first external thread that is screwed with oil filling hole 410;

[0027] As shown in Figure 3As shown, the second through hole 310 is provided in the middle of the sensor fastening nut 300, through which the upper end of the sensor passes, and the inner diameter of the second through hole 310 is smaller than the outer diameter of the annular boss 220, and the outer wall of the sensor fastening nut 300 has a second external thread matched with the second internal threaded hole section 111.

[0028] The mounting device designed in the embodiment solves the mounting problem of the dynamic pressure sensor 200 by using the existing oil injection hole 410 of the hydraulic buffer 400 and designing a mounting seat 100 corresponding in size. Figure 2 、 3 As shown, the pressure sensor 200 is installed in the first through hole 110 of the mounting seat 100, and the lower surface of the annular boss 220 of the pressure sensor 200 is matched with the first light hole section 112 and the second light hole section 113 of the mounting seat 100, which can play a role in limiting the front end of the pressure sensor 200. The sensor fastening nut 300 is screwed with the mounting seat 100 until the lower end surface of the sensor fastening nut 300 is pressed against the upper surface of the annular boss 220 of the pressure sensor 200, which can ensure the limitation of the rear end of the pressure sensor 200 in the first through hole 110 of the mounting seat 100. The front and rear end limitations together ensure that the position of the pressure sensor 200 in the mounting seat 100 is fixed and cannot be moved. At the same time, the outer wall of the annular boss 220 is in interference fit with the inner wall of the first light hole section 112, which plays a certain sealing role. The mounting seat 100 with the fixed pressure sensor 200 is installed on the hydraulic buffer 400 through the existing oil injection hole 410, and the first external thread of the mounting seat 100 is matched with the first internal thread of the oil injection hole 410 to fasten the mounting seat 100 inside the oil injection hole 410. Finally, the pressure sensor 200 is firmly installed on the hydraulic buffer 400 by using the mounting device.

[0029] In order to reduce the risk of direct exposure of the pressure sensor 200 to a high-pressure environment and prevent damage to the pressure sensor 200 caused by vibration or impact, the pressure sensor 200 is installed in an embedded manner, wherein the height of the first external thread is 1mm shorter than the height of the first internal thread, and the distance from the lower surface of the annular boss 220 to the sensor sensing surface 230 is equal to the depth of the second light hole section 113, which ensures that the sensor sensing surface 230 is flush with the lower end surface of the mounting seat 100, so that the pressure sensor 200 can effectively and safely perform pressure testing.

[0030] A first sealing ring is installed between the mounting seat 100 and the oil injection hole 410, and a second sealing ring is installed between the bottom surface of the annular boss 220 and the upper end surface of the second light hole section 113, which better plays a sealing role and enhances the overall sealing performance.

[0031] As shown, Figure 4 、 6As shown, the outer wall of the upper end of the sensor fastening nut 300 and the outer wall of the upper end of the mounting seat 100 are both provided with a hexagonal protruding structure with a center line coinciding with the central axis of the oil injection hole 410, that is, the upper end of the mounting seat 100 is a hexagonal protruding structure, which is placed outside the hydraulic buffer 400 after assembly. Since the upper end of the mounting seat 100 is a hexagonal protruding structure with a size larger than the diameter of the oil injection hole 410, the mounting seat 100 can be firmly installed in the oil injection hole 410, and the upper end of the mounting seat 100 is a hexagonal protruding structure placed outside the hydraulic buffer 400, which facilitates installation, replacement and other operations.

[0032] The mounting device in the embodiment has simple structure, easy processing, easy installation and easy replacement. The mounting seat 100 is designed in size and positioned to ensure that the pressure sensor 200 can be firmly installed on the hydraulic buffer 400, and at the same time, the mounting seat 100 has stable structure and can effectively resist the influence of interference factors such as vibration and impact on the performance of the pressure sensor 200, so that the working performance of the pressure sensor 200 is stable. The outer wall of the annular boss 220 is in interference fit with the inner wall of the first light hole section 112, which plays a sealing role. A second sealing ring can also be installed between the bottom surface of the annular boss 220 and the upper end surface of the second light hole section 113 to form "double insurance", and a first sealing ring is installed between the mounting seat 100 and the oil injection hole 410 to better play a sealing role and enhance the system sealing performance. The first outer thread of the mounting seat 100 cooperates with the first inner thread, so that the purpose of testing the internal dynamic pressure of the hydraulic buffer 400 by the pressure sensor 200 can be achieved without damaging the structure of the hydraulic buffer 400.

[0033] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the present application can be combined in the same or similar manner with one or more other embodiments, combined with the features in other embodiments or replaced with the corresponding features in other embodiments. The technical solutions obtained by combining or replacing should be considered to be within the protection scope of the present application.

Claims

1. An installation device for dynamic pressure testing of a hydraulic damper, the hydraulic damper (400) having an oil filler hole (410) with a first internal thread, characterized in that, The pressure sensor (200) for pressure test has a cylindrical main body (210), one end of which is a sensor sensing surface (230) of the pressure sensor (200), and an annular boss (220) is arranged on the main body (210) close to the sensing surface of the pressure sensor (200); the mounting device comprises: A mounting seat (100) is provided with a first through hole (110) for the sensor to pass through, the upper part of the first through hole (110) is a second internally threaded hole section (111), the middle part is a first light hole section (112), the lower part is a second light hole section (113), and the diameter of the first light hole section (112) is equal to the diameter of the second internally threaded hole section (111), the diameter of the first light hole section (112) is greater than the diameter of the second light hole section (113); the outer wall of the annular boss (220) is in interference fit with the inner wall of the first light hole section (112), and the lower outer wall of the mounting seat (100) is provided with a first external thread matched with the oil injection hole (410); A sensor fastening nut (300) is provided with a second through hole (310) for the upper end of the sensor to pass through, and the inner diameter of the second through hole (310) is smaller than the outer diameter of the annular boss (220), and the outer wall of the sensor fastening nut (300) is provided with a second external thread matched with the second internally threaded hole section (111).

2. The mounting device of claim 1, wherein The height of the first external thread is shorter than the height of the first internal thread.

3. The mounting device of claim 2, wherein, The height of the first external thread is 1-2 mm shorter than the height of the first internal thread.

4. The mounting device of claim 1, wherein, The distance from the lower surface of the annular boss (220) to the sensor sensing surface (230) is equal to the depth of the second light hole section (113).

5. The mounting device of claim 1, wherein, A first sealing ring is mounted between the mounting seat (100) and the oil injection hole (410).

6. The mounting device of claim 1, wherein, A second sealing ring is mounted between the bottom surface of the annular boss (220) and the upper end surface of the second light hole section (113).

7. The mounting device of claim 1, wherein The upper end outer wall of the sensor fastening nut (300) and the upper end outer wall of the mounting seat (100) are each provided with a hexagonal protruding structure with a center line coinciding with the central axis of the oil injection hole (410).

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