Arc length testing fixture for open bushing C-shaped pipe

Abstract

The utility model discloses an open bushing C-shaped pipe arc length testing fixture, which comprises a conical locking block, a split expansion block, an open width go-no go gauge, a ring gauge and a base, the ring gauge is arranged on the base, the inner diameter of the ring gauge is matched with the outer diameter of a C-shaped pipe, and the side wall of the ring gauge is provided with a ring gauge groove; the C-shaped pipe is arranged in the ring gauge, and the open end of the C-shaped pipe corresponds to the ring gauge groove; the split expansion block is arranged in the C-shaped pipe; a conical locking block is inserted and locked in the split expansion block, and the split expansion block corrects the outer diameter of the C-shaped pipe until the outer wall of the C-shaped pipe is tightly attached to the inner wall of the ring gauge; and an opening width go-no go gauge passes through the ring gauge groove to detect the opening size of the C-shaped pipe. The arc length detection tool for the C-shaped pipe with the opening lining can rapidly detect whether the size of the opening meets the drawing requirement or not, detect the actual size of the opening, and further measure the arc length size of the C-shaped pipe after being rolled.

Description

Technical Field

[0001] The utility model relates to an arc length gauge for an open bushing C-tube. Background Art

[0002] Please refer to Figure 1 、 Figure 2 and Figure 3 The guiding device of the automobile chassis suspension system is connected to the vehicle body through a rubber bushing. The rubber bushing has become an indispensable important component in the automobile due to its excellent vibration isolation performance, elastic characteristics and damping characteristics. Among them, the open rubber bushing has better durability than the ordinary bushing. Due to the single-opening design of the open bushing C-tube 3, it does not need to overcome the diameter reduction force of the outer tube, and there is no risk of deformation and degumming of the outer skeleton caused by excessive preload. Only a small amount of plastic deformation caused by interference fitting occurs, so a larger rubber compression amount can be designed to improve the durability and better comfort performance. The interference amount between the open bushing C-tube and the assembly hole depends on the arc length dimension of the outer sleeve.

[0003] The key dimensions of the C-tube 3: wall thickness T, outer diameter D, height H, arc length L after curling, opening angle θ, and opening width W. Among them, based on the outer diameter D, the arc length L and the opening size after curling are approximately in a functional relationship (see Figure 2 ).

[0004] The relationship between the opening angle and the opening width is as follows:

[0005]

[0006] That is

[0007] The relationship between the neutral arc length and the opening angle is as follows:

[0008]

[0009] Converted to the relationship between the neutral arc length and the opening width as follows:

[0010]

[0011] The arc length of the open bushing C-tube in the curled state cannot be quickly measured by a measuring tool, and it is not in a standard circular state after curling. It is necessary to correct the outer diameter to the reference by a gauge, and then use a go-no-go gauge block to quickly detect the opening state or use a caliper to measure the actual opening size. Therefore, it is necessary to design an arc length gauge suitable for the C-tube to quickly detect whether the opening size meets the requirements of the drawing and detect the actual opening size. Content of the Utility Model

[0012] The purpose of the present utility model is to overcome the defects of the prior art and provide an arc length gauge for an open bushing C-shaped tube, which can quickly detect whether the opening size meets the requirements of the drawing, detect the actual opening size, and then measure the arc length size after the C-shaped tube is rolled into a circle.

[0013] The technical solution to achieve the above purpose is: an arc length gauge for an open bushing C-shaped tube, including a conical locking block, a split expansion block, an opening width go-no-go gauge, a ring gauge, and a base, wherein:

[0014] The ring gauge is arranged on the base, the inner diameter of the ring gauge is adapted to the outer diameter of the C-shaped tube, and a ring gauge groove is formed on the side wall of the ring gauge;

[0015] The C-shaped tube is arranged in the ring gauge, and the opening end of the C-shaped tube corresponds to the ring gauge groove;

[0016] The split expansion block is arranged in the C-shaped tube;

[0017] The conical locking block is inserted into and locked in the split expansion block, and the split expansion block corrects the outer diameter of the C-shaped tube until the outer wall of the C-shaped tube is closely attached to the inner wall of the ring gauge;

[0018] The opening width go-no-go gauge passes through the ring gauge groove to detect the opening size of the C-shaped tube.

[0019] In the above arc length gauge for an open bushing C-shaped tube, the size of the opening width go-no-go gauge is designed according to the theoretical opening size and tolerance of the C-shaped tube.

[0020] In the above arc length gauge for an open bushing C-shaped tube, a caliper is used to detect the actual opening size of the C-shaped tube.

[0021] The arc length gauge for an open bushing C-shaped tube of the present utility model can quickly detect whether the opening size meets the requirements of the drawing, detect the actual opening size, and then measure the arc length size after the C-shaped tube is rolled into a circle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of an open bushing C-shaped tube;

[0023] Figure 2 is Figure 1 a sectional view taken along the A-A direction of;

[0024] Figure 3 is a schematic diagram of the relationship between the neutral arc length and the opening of the C-shaped tube;

[0025] Figure 4 is a structural schematic diagram of the arc length gauge for an open bushing C-shaped tube of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to enable those skilled in the art of the present technology to better understand the technical solution of the present utility model, the following will describe its specific implementation manners in detail with reference to the accompanying drawings:

[0027] Please refer to Figure 4 , the best embodiment of the present utility model, an arc length gauge for an open bushing C-shaped tube, comprising a conical locking block 1, a split expansion block 2, an opening width go-no-go gauge 4, a ring gauge 5 and a base 6.

[0028] The ring gauge 5 is arranged on the base 6. Based on the outer diameter of the C-shaped tube 3, the inner diameter of the ring gauge 5 is designed, and the inner diameter of the ring gauge 5 is adapted to the outer diameter of the C-shaped tube 3. A ring gauge groove 51 is opened on the side wall of the ring gauge 5.

[0029] The C-shaped tube 3 is arranged inside the ring gauge 5, and the open end of the C-shaped tube 3 corresponds to the ring gauge groove 51.

[0030] The split expansion block 2 is arranged inside the C-shaped tube 3; the conical locking block 1 is inserted into and locked in the split expansion block 2, and the split expansion block 2 corrects the outer diameter of the C-shaped tube 3 until the outer wall of the C-shaped tube 3 is in close fit with the inner wall of the ring gauge 5; the opening width go-no-go gauge 4 passes through the ring gauge groove 51 to detect the opening size of the C-shaped tube 3.

[0031] The size of the opening width go-no-go gauge 4 is designed according to the theoretical opening size and tolerance of the C-shaped tube 3. A caliper can be used to detect the actual opening size of the C-shaped tube 3.

[0032] For the arc length gauge of the open bushing C-shaped tube of the present utility model, when in use, the C-shaped tube 3 is placed in the ring gauge 4, and the split expansion block 2 is expanded by the sinking and locking of the conical locking block 1, so as to correct the outer diameter of the C-shaped tube 3 and make it in close fit with the inner wall of the ring gauge 5. The opening width go-no-go gauge 4 designed according to the theoretical opening size and tolerance enables it to quickly detect whether the opening size of the C-shaped tube 3 meets the requirements of the drawing at the position of the ring gauge groove 51, and the actual opening size of the C-shaped tube 3 can be detected by a caliper. The arc length L size after the C-shaped tube is rolled can be calculated through formula (4).

[0033]

[0034] In formula (4), T is the wall thickness of the C-shaped tube, D is the outer diameter of the C-shaped tube, and W is the opening width of the C-shaped tube.

[0035] In summary, the arc length gauge of the open bushing C-shaped tube of the present utility model can quickly detect whether the opening size meets the requirements of the drawing, detect the actual opening size, and further measure the arc length size after the C-shaped tube is rolled.

[0036] Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present utility model, rather than to limit the present utility model. As long as within the scope of the substantial spirit of the present utility model, changes and modifications to the above-described embodiments will fall within the scope of the claims of the present utility model.

Claims

1. An arc length gauge for an open bushing C-shaped tube, characterized in that, It includes a conical locking block, a split expansion block, an opening width go-no-go gauge, a ring gauge and a base. Among them: The ring gauge is arranged on the base. The inner diameter of the ring gauge is adapted to the outer diameter of the C-shaped pipe, and a ring gauge groove is formed on the side wall of the ring gauge; The C-shaped pipe is arranged in the ring gauge, and the open end of the C-shaped pipe corresponds to the ring gauge groove; The split expansion block is arranged in the C-shaped pipe; The conical locking block is inserted into and locked in the split expansion block. The split expansion block corrects the outer diameter of the C-shaped pipe until the outer wall of the C-shaped pipe is in close fit with the inner wall of the ring gauge; The opening width go-no-go gauge passes through the ring gauge groove to detect the opening size of the C-shaped pipe.

2. The arc length checker for the opening bushing C-shaped tube according to claim 1, wherein, The size of the opening width go-no-go gauge is designed according to the theoretical opening size and tolerance of the C-shaped pipe.

3. The arc length checker for the opening bushing C-shaped tube according to claim 1, characterized in that, A caliper is used to detect the actual opening size of the C-shaped pipe.

Images