Durability test tool for rotary joint

Abstract

The utility model discloses a rotary joint durability test tool, which comprises a rotary motor, a counter, a fixed plate and a limiting plate arranged on the fixed plate, an output shaft of the rotary motor is fixed with an inner shaft of a rotary joint, the fixed plate is provided with a through hole for the output shaft to pass through, and the limiting plate circumferentially limits an outer adapter of the rotary joint; a pin is installed on the peripheral face of an output shaft of the rotating motor, a probe of the counter is located on one side of the output shaft, and when the pin is right opposite to the probe, the counter counts once. According to the utility model, the bolt is arranged on the output shaft of the rotating motor, the counting effect is realized through mutual induction of the bolt and the probe of the counter, the structure is simple and reliable, the external adapter does not need to be rotated, the actual working condition can be simulated for testing, and the testing precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of rotary joint testing technology, and in particular to a rotary joint durability testing fixture. Background Technology

[0002] In a reel, a rotary joint is typically used to connect to the spindle. The rotary joint has one or more ports for connecting external piping to the flexible hose wound on the reel, and for conveying the medium through the internal flow of the rotary joint into the hose, such as... Figure 1 As shown, a rotary joint typically includes an inner shaft 501 and an outer adapter 502. The inner shaft 501 and the outer adapter 502 are rotatably connected. The end of the inner shaft is connected to the main shaft and rotates with the main shaft. To prevent leakage of the circulating medium, the rotatable connection between the inner shaft and the outer adapter needs to be sealed. Therefore, a durability test is required after the rotary joint is manufactured to test its service life.

[0003] However, existing testing fixtures are quite complex. For example, the test bench disclosed in patent number CN202510020679 uses complex gears and connecting rods to achieve rotation counting, resulting in numerous components and making the test bench prone to failure. Another example is the testing fixture disclosed in patent number CN201720585072, which fixes the spindle and performs testing by rotating a rotary joint. First, this structure is only suitable for situations where the interface between the spindle and the external rotary joint is connected. It is not suitable for the rotary joint type of this invention, which is only connected between the interfaces of the external rotary joint. Second, this structure cannot achieve a full rotation of the external rotary joint; it can only move the external rotary joint left and right, which does not fully simulate the working conditions of the rotary joint and will result in testing errors.

[0004] Therefore, it is necessary to design a testing fixture that is simple in structure, has high testing accuracy, and is more widely applicable. Utility Model Content

[0005] To address the technical problems of existing rotary joint testing fixtures being complex in structure, prone to failure, or having limited applicability and low testing accuracy, this utility model provides a rotary joint durability testing fixture to solve the above problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a rotary joint durability testing fixture, including a rotary motor, a counter, a fixed plate and a limiting plate mounted on the fixed plate, wherein the output shaft of the rotary motor is fixed to the inner shaft of the rotary joint, the fixed plate has a through hole for the output shaft to pass through, and the limiting plate limits the outer rotating part of the rotary joint circumferentially; a pin is installed on the outer circumferential surface of the output shaft of the rotary motor, and the probe of the counter is located on one side of the output shaft. When the pin is directly opposite the probe, the counter counts once.

[0007] In an optional embodiment of this utility model, the output shaft of the rotary motor has a radially through threaded hole, and the pin is threadedly connected to the threaded hole.

[0008] In an optional embodiment of this utility model, the limiting plate includes a side plate corresponding to at least two side walls of the external adapter and an mounting plate that is fixed to the fixing plate, wherein the mounting plate and the side plate are integrally formed.

[0009] In an optional embodiment of this utility model, a portal frame is also included, the rotary motor is fixed on the upper surface of the portal frame, and the counter and fixing plate are mounted on the side of the portal frame.

[0010] In an optional embodiment of this utility model, a base plate is installed at the bottom of the gantry-shaped mounting bracket.

[0011] The beneficial effects of this utility model are:

[0012] (1) This utility model achieves the counting effect by installing a pin on the output shaft of a rotary motor and using the mutual induction between the pin and the probe of the counter. The structure is simple and reliable, and there is no need for a rotating external adapter. It can simulate actual working conditions for testing and ensure test accuracy.

[0013] (2) This utility model utilizes a door-shaped mounting bracket to provide an easy-to-operate mounting surface, so that each component can be easily assembled without any assembly dead corners, and without affecting the stable placement of the tooling. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the rotary joint tested in this utility model;

[0016] Figure 2 This is a perspective view of a specific embodiment of the rotary joint durability testing fixture described in this utility model;

[0017] Figure 3 This is a left view of the rotary joint durability testing fixture described in this utility model;

[0018] Figure 4 yes Figure 3 Sectional view along axis AA;

[0019] Figure 5 yes Figure 4 BB-direction sectional view.

[0020] In the diagram, 1. Rotary motor, 2. Base plate, 3. Fixing plate, 301. Through hole, 4. Limiting plate, 401. Side plate, 402. Mounting plate, 5. Rotary joint, 501. Inner shaft, 502. Outer adapter, 6. Output shaft, 601. Threaded hole, 7. Pin, 8. Counter, 801. Probe, 802. Control unit, 9. Gate-shaped mounting bracket. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] Example 1

[0023] like Figures 2-5 As shown, a durability testing fixture for a rotary joint includes a rotary motor 1, a counter 8, a fixing plate 3, and a limiting plate 4 mounted on the fixing plate 3. The output shaft 6 of the rotary motor 1 is fixed to the inner shaft 501 of the rotary joint 5. The fixing plate 3 has a through hole 301 through which the output shaft 6 passes. The limiting plate 4 circumferentially limits the outer rotating joint 502 of the rotary joint 5. A pin 7 is installed on the outer circumferential surface of the output shaft 6 of the rotary motor 1. The probe 801 of the counter 8 is located on one side of the output shaft 6. When the pin 7 and the probe 801 are directly opposite each other, the counter 8 counts once.

[0024] Rotary motor 1 is used to provide rotational driving force. The output shaft 6 of rotary motor 1 is equivalent to the spindle in the reel. Counter 8 is divided into probe 801 and control part 802. Control part 802 has a controller and a display. When pin 7 is aligned with probe 801, counter 8 counts once and records it on the display.

[0025] During testing, one port of the external adapter 502 was connected to the air pipe to allow high-pressure gas to enter, while the other ports were blocked. After the rotary motor 1 was started, the output shaft 6 drove the pin 7 and the inner shaft 501 to rotate. The external adapter 502 did not rotate under the limiting action of the limiting plate 4, thus simulating the service life of the actual spindle driving the rotary connector 5. Furthermore, the rotary motor 1 could continuously rotate in the same direction without any limitation on the rotation angle. When air leakage occurred, the counting was observed.

[0026] The pin 7 can be inserted into the output shaft 6 by interference fit. In other alternative embodiments, in order to prevent the pin 7 from falling off, a radially through threaded hole 601 can also be provided on the output shaft 6 of the rotary motor 1, and the pin 7 is threaded into the threaded hole 601.

[0027] The limiting plate 4 includes side plates 401 corresponding to at least two side walls of the external adapter 502 and mounting plate 402 fixed to the fixing plate 3. The mounting plate 402 and the side plates 401 are integrally formed. The outer side wall of the external adapter 502 is generally approximately flat, so the side plates 401 can fit against the outer side wall of the external adapter 502. In this embodiment, the external adapter 502 has only one interface, so the side plates 401 can refer to three, leaving interfaces. The mounting plate 402 fits against the fixing plate 3 and is fixed by screws.

[0028] Example 2

[0029] Based on Embodiment 1, the tooling also includes a gantry-shaped mounting bracket 9, such as... Figure 4 As shown, the portal frame 9 arches upwards, forming a cavity at the bottom. The rotary motor 1 is fixed to the upper surface of the portal frame 9, and the counter 8 and fixing plate 3 are installed on the side of the portal frame 9. Specifically, the probe 801 of the counter 8 is installed on the upper surface of the portal frame 9, and the control part 802 of the counter 8 is installed on the side of the portal frame 9. When installing the rotary motor 1, counter 8, and fixing plate 3 with the portal frame 9, a hand can be inserted into the cavity for operation, facilitating quick and easy installation without any dead angles. Furthermore, screws and other connecting parts are not connected to the bottom surface of the portal frame 9, and there are no protruding structures on the bottom surface of the portal frame 9, thus not affecting its stability.

[0030] In a further design, a base plate 2 is installed at the bottom of the gantry mounting bracket 9.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tooling for testing the durability of a rotary joint, characterized in that: It includes a rotary motor, a counter, a fixed plate, and a limiting plate mounted on the fixed plate. The output shaft of the rotary motor is fixed to the inner shaft of the rotary joint. The fixed plate has a through hole for the output shaft to pass through. The limiting plate limits the circumferential movement of the outer rotating joint of the rotary joint. A pin is installed on the outer circumference of the output shaft of the rotary motor. The probe of the counter is located on one side of the output shaft. When the pin is directly opposite the probe, the counter counts once.

2. The rotary joint durability testing fixture according to claim 1, characterized in that: The output shaft of the rotary motor has a radially through threaded hole, and the pin is threaded into the threaded hole.

3. The rotary joint durability testing fixture according to claim 1, characterized in that: The limiting plate includes side plates corresponding to at least two side walls of the external adapter and an mounting plate that is fixed to the fixing plate. The mounting plate and the side plates are integrally formed.

4. The rotary joint durability testing fixture according to claim 1, characterized in that: It also includes a portal frame, the rotary motor is fixed to the upper surface of the portal frame, and the counter and fixing plate are mounted on the side of the portal frame.

5. The rotary joint durability testing fixture according to claim 4, characterized in that: The bottom of the portal frame is fitted with a base plate.

Images