Dish-shaped gasket testing tool

Abstract

The utility model discloses a disc-shaped gasket testing tool, which comprises an upper contact piece, a lower contact piece and an observation gasket, and is characterized in that the observation gasket is fixedly connected to the lower contact piece and is used for observing a dial indicator; the dish-shaped gasket is arranged between the upper contact piece and the lower contact piece, the dish-shaped gasket is positioned above the central part of the lower contact piece, and the upper contact piece is arranged above the central part of the convex surface of the dish-shaped gasket; the dial indicator is used for measuring deformation displacement of the disc-shaped gasket; the connecting piece is used for connecting the dial indicator with the lower contact piece so as to fix the dial indicator; the dial indicator is fixedly connected to the lower contact piece, a measuring rod of the dial indicator passes through the through hole of the lower contact piece, and a measuring head contacts with the lower end face of the upper contact piece; the upper contact piece and the lower contact piece are not easy to deform during the load test of the dish-shaped gasket, the upper contact piece and the lower contact piece are coaxially installed in cooperation with the dial indicator, the load measurement result of the dish-shaped gasket is more accurate, the design of the notch of the observation gasket facilitates the installation, disassembly and observation of the dial indicator, the occupied space is small, and the cost of the test tool is low.

Description

Technical Field

[0001] The utility model relates to the field of disc spring testing, in particular to a disc washer testing tool. Background Art

[0002] Belleville washers are mainly used as anti-loosening washers for bolt and screw connections. They are used for the connection of medium or high-strength bolts and screws. They are part of belleville springs, but their stiffness is an order of magnitude greater than that of ordinary belleville springs. During the test process, they are affected by the accuracy of the test device and often cannot accurately test their load size. The main reason is that the belleville washers have high stiffness. During the test, the upper and lower plates of the pressure testing machine have lower stiffness than their own stiffness, resulting in different degrees of deformation of the upper and lower plates of the pressure testing machine. When the total compression is constant, the actual compression of the belleville washers is reduced, and the displacement test results of the belleville washers are smaller than the actual ones. The measurement error is large, which has a great impact on the accuracy of the matching design of the belleville washers in actual application scenarios. Utility Model Content

[0003] In view of this, in order to solve the above technical problems, the utility model adopts the following technical solutions:

[0004] A disc washer testing tool comprises an upper contact sheet, a lower contact sheet, and further comprises:

[0005] An observation washer, the observation washer is fixedly connected and arranged below the lower contact piece for observing the dial indicator;

[0006] A disc-shaped washer, the disc-shaped washer is arranged between the upper contact piece and the lower contact piece, the disc-shaped washer is located above the center portion of the lower contact piece, and the upper contact piece is arranged above the center portion of the convex surface of the disc-shaped washer;

[0007] Dial indicator, used to measure the deformation displacement of Belleville washers;

[0008] A connecting piece is used to connect the dial indicator to the lower contact piece to fix the dial indicator;

[0009] A through hole is axially provided in the center of the lower contact piece, the dial gauge is connected and fixed to the lower contact piece through a connecting piece, the measuring rod of the dial gauge passes through the through hole, and the measuring head of the dial gauge contacts the lower end surface of the upper contact piece.

[0010] Preferably, the through hole is clearance-matched with the sleeve of the dial indicator.

[0011] Preferably, the connecting piece is connected and fixed to the lower contact gasket via a screw; and the dial indicator is tightly connected to the connecting piece.

[0012] Preferably, the thickness H1 of the upper contact piece is greater than or equal to five times the thickness h of the disc washer, and the hardness of the contact piece is greater than HRC58; this design prevents deformation of the upper contact piece during load testing of the disc washer.

[0013] Preferably, the thickness H2 of the lower contact piece is greater than or equal to five times the thickness h of the disc washer, and the hardness of the contact piece is greater than HRC58; this design prevents the lower contact piece from deforming during the load test of the disc washer.

[0014] Preferably, a notch is provided in the circumferential direction of the middle part of the observation washer, and the upper end face of the observation washer is welded to the lower end face of the lower contact piece; the body of the dial indicator is arranged in the notch and is fixedly connected to the lower contact piece through a connecting piece; the thickness H3 of the observation washer is greater than five times the thickness h of the disc washer, and the hardness is above HRC58; this design facilitates the installation, observation and space saving of the dial indicator.

[0015] According to the above technical solution, the beneficial effects of the utility model are:

[0016] Compared with the existing technology, the upper and lower contact pieces are not easily deformed during the dish washer load test. The upper and lower contact pieces are coaxially installed with the dial indicator, and the dish washer load measurement results are more accurate. The design of the observation washer groove facilitates the installation, disassembly and observation of the dial indicator, takes up little space, and the overall cost of the test tooling is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0019] Figure 3 for Figure 2 Schematic diagram of the cross-section structure along the BB axis.

[0020] In the accompanying drawings, 100, upper contact piece; 200, lower contact piece; 210, through hole; 300, observation gasket; 310, notch; 400, disc gasket; 500, dial indicator; 510, sleeve; 520, measuring rod; 600, connecting piece. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention.

[0022] like Figure 1-3 The disc washer test fixture shown includes an upper contact piece 100 and a lower contact piece 200.

[0023] The disc washer 400 is disposed between the upper contact piece 100 and the lower contact piece 200, the disc washer 400 is located above the center of the lower contact piece 200, and the upper contact piece 100 is located above the center of the convex surface of the disc washer 400; the observation washer 300 is welded and connected to the bottom of the lower contact piece 200 for observing the dial indicator 500; the dial indicator 500 is used to measure the deformation displacement of the disc washer 400; the connecting piece 600 includes bolts and nuts (not shown in the figure); it is used to connect the dial indicator 500 with the lower contact piece 200 to fix the dial indicator 500;

[0024] like Figure 3 As shown, a through hole 210 is axially provided in the center of the lower contact piece 200, and the through hole 210 is clearance-matched with the sleeve 510 of the dial indicator 500, which is convenient for radial limiting of the measuring rod and conducive to accurate measurement results.

[0025] The dial gauge 500 is connected and fixed to the lower contact piece 200 via a connecting piece 600 . The measuring rod 520 of the dial gauge 500 passes through the through hole 210 , and the measuring head of the dial gauge 500 contacts the lower end surface of the upper contact piece 100 .

[0026] The connecting piece 600 is connected and fixed to the lower contact gasket 200 via a screw; the dial indicator 500 is tightly connected to the connecting piece 600.

[0027] like Figure 3 As shown, the thickness H1 of the upper contact sheet 100 is greater than or equal to five times the thickness h of the disc washer 400, the thickness H2 of the lower contact sheet 200 is greater than or equal to five times the thickness h of the disc washer 400, and the hardness of the contact sheet is above HRC58; this design prevents the deformation of the contact sheet during the load test of the disc washer 400 by increasing the thickness of the upper and lower contact sheets, reduces the measurement error, and makes the measurement more accurate.

[0028] A notch 310 is circumferentially provided in the middle of the observation washer 300, and the upper end face of the observation washer 300 is welded to the lower end face of the lower contact piece 200; the body of the dial indicator 500 is arranged in the notch 310, and is fixedly connected to the lower contact piece 200 through a connecting piece 600; the thickness H3 of the observation washer 300 is greater than five times the thickness h of the disc washer 400, and the hardness is above HRC58; the design of the notch 310 of the observation washer 300 facilitates the installation, disassembly, and observation of the dial indicator 500, and takes up little space; the end faces of the upper and lower contact pieces are both finely ground, and are not easily deformed during the load test of the disc washer 400; the upper and lower contact pieces are coaxially installed with the dial indicator, and the load measurement result of the disc washer 400 is more accurate.

[0029] During the test, after the measuring head of the dial gauge 500 contacts the lower end surface of the upper contact piece 100, the dial gauge is reset to zero, the pneumatic testing machine is compressed, and after observing that the reading of the dial gauge 500 reaches the predetermined requirement, the load value of the testing machine is read.

[0030] However, the above description is only a preferred feasible embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Therefore, any equivalent structural changes made using the contents of the present utility model specification and drawings are also included in the scope of the present utility model.

Claims

1. A disc washer testing tool, comprising an upper contact sheet and a lower contact sheet, characterized in that: Also includes: An observation washer, the observation washer is fixedly connected and arranged below the lower contact piece for observing the dial indicator; A disc-shaped washer, the disc-shaped washer is arranged between the upper contact piece and the lower contact piece, the disc-shaped washer is located above the center portion of the lower contact piece, and the upper contact piece is arranged above the center portion of the convex surface of the disc-shaped washer; Dial indicator, used to measure the deformation displacement of Belleville washers; A connecting piece is used to connect the dial indicator to the lower contact piece to fix the dial indicator; A through hole is axially provided in the center of the lower contact piece, the dial gauge is connected and fixed to the lower contact piece through a connecting piece, the measuring rod of the dial gauge passes through the through hole, and the measuring head of the dial gauge contacts the lower end surface of the upper contact piece.

2. A disc washer testing tool according to claim 1, characterized in that: The through hole is clearance-matched with the sleeve of the dial indicator.

3. A disc washer testing tool according to claim 1, characterized in that: The connecting piece is connected and fixed to the lower contact gasket through a screw rod; and the dial indicator is tightly connected to the connecting piece.

4. A disc washer testing tool according to claim 1, characterized in that: The thickness H1 of the upper contact piece is greater than or equal to five times the thickness h of the disc washer, and the hardness of the upper contact piece is greater than HRC58.

5. The disc washer testing tool according to claim 1, characterized in that: The thickness H2 of the lower contact piece is greater than or equal to five times the thickness h of the disc washer, and the hardness of the lower contact piece is greater than HRC58.

6. A disc washer testing tool according to claim 1, characterized in that: A notch is provided in the circumferential direction of the middle part of the observation washer, and the upper end face of the observation washer is welded to the lower end face of the lower contact piece; the body of the dial indicator is arranged in the notch and is fixedly connected to the lower contact piece through a connecting piece; the thickness H3 of the observation washer is greater than five times the thickness h of the disc washer, and the hardness is above HRC58.

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