Hole depth and step height testing fixture

Abstract

The utility model discloses a hole depth and step height gauge, which comprises a first rod body, a first reference body, a vernier, a second rod body and a second reference body, the first reference body is connected to the end part of the first rod body, the first reference body is used as a zero position reference, the vernier is arranged on the first rod body in a sliding manner, the vernier is used for measuring the size, and the second rod body is used for measuring the step height. The second rod body is connected with the vernier, the second reference body is connected to the second rod body, and the second reference body is used for being in contact with another surface to be measured. Through the cooperation of the first reference body and the second reference body, the vernier is adjusted to a corresponding position according to the to-be-measured hole depth or step height, and the vernier obtains a corresponding value, thereby completing the measurement of the hole depth or step height.

Description

TECHNICAL FIELD

[0001] The utility model relates to a testing fixture technical field, especially a testing fixture for the special-shaped hole and the step height of cylinder liner. BACKGROUND

[0002] The cylinder is a kind of execution element for converting compressed air energy into linear motion mechanical energy.The typical structure is composed of cylinder barrel, cylinder liner, piston, piston rod, front and rear end covers and sealing elements.When compressed air enters cylinder barrel, piston drives piston rod to extend, and when compressed air is discharged from cylinder barrel, piston drives piston rod to retract.

[0003] The cylinder liner is one of important components for the stable work of cylinder, and some milled holes and step positions in the existing cylinder liner cannot be quickly detected in the field due to large workpieces or special detected positions. UTILITY MODEL CONTENT

[0004] The hole depth and step height testing device provided by the embodiment of the application is used to solve the technical problem of inconvenient measurement of the hole depth and step height of cylinder liner.

[0005] The first aspect of the application provides a hole depth and step height testing device, comprising:

[0006] First rod body;

[0007] First reference body, connected to the end of the first rod body, the first reference body is used as zero reference;

[0008] Vernier, slidingly arranged on the first rod body, the vernier is used to measure size;

[0009] Second rod body, connected with the vernier;

[0010] Second reference body, connected to the second rod body, the second reference body is used to contact with another surface to be measured.

[0011] The beneficial effects of the above-mentioned embodiment are that, by cooperation of the first reference body and the second reference body, the vernier is adjusted to the corresponding position according to the hole depth or step height to be measured, and the corresponding value is obtained from the vernier, so that the measurement of the hole depth or step height is completed.

[0012] On the basis of the above-mentioned embodiment, the embodiment of the application can also be improved as follows:

[0013] In one embodiment of the application, the vernier is slidingly arranged on the first rod body along X direction, the second reference body is slidingly arranged on the second rod body along Y direction, and the X direction is perpendicular to the Y direction.The beneficial effect of this step is that it is convenient to adjust the position of the second reference body relative to the first connecting rod, thereby improving the ease of use of the testing device.

[0014] In one of the embodiments of the present application: further comprising: a locking piece, the locking piece is connected to the second reference body, the locking piece is used to position the second reference body on the second rod body. The beneficial effect of this step: through the locking piece, the stability of the positioning of the second reference body is improved.

[0015] In one of the embodiments of the present application: further comprising: a limiting piece, the limiting piece is connected to the second rod body, the limiting piece is used to limit the second reference body on the second rod body. The beneficial effect of this step: through the limiting piece, the second reference body is prevented from sliding off the second rod body.

[0016] In one of the embodiments of the present application: the first reference body is a magnetic structure. The beneficial effect of this step: the stability of the positioning of the gauge is improved.

[0017] In one of the embodiments of the present application: the second reference body comprises a positioning needle, the positioning needle is slidably arranged on the second rod body along the X direction. The beneficial effect of this step: when the second reference body is retracted, the second reference body can be conveniently stored in the second rod body, and when the second reference body is extended, the measuring distance of the gauge can be expanded. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0019] Figure 1 It is a structural schematic view of the first embodiment;

[0020] Figure 2 It is a structural schematic view of the second embodiment;

[0021] Figure 3 It is a structural schematic view of the third embodiment.

[0022] Among them, 1 first rod body, 2 first reference body, 201 first connecting block, 202 second connecting block, 203 magnet, 204 gland, 3 vernier, 4 second rod body, 5 second reference body, 201 sliding block, 202 positioning needle, 501 connecting sleeve, 6 locking piece, 7 limiting piece. DETAILED DESCRIPTION

[0023] In this application, unless otherwise expressly specified and limited, the terms used should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. If electrical or electronic equipment is involved, it can also refer to an electrical connection or a communication signal connection, etc. For those skilled in the art, the specific meaning of different terms in this utility model can be understood according to the specific circumstances, and the scope of the specific meaning should be limited to achieving the function of this application.

[0024] In the description of this application, it should be understood that the directional terms or positional relationships described are based on the orientation or positional relationships shown in the accompanying drawings, or based on the orientation or positional relationships in actual use, and are only for the purpose of facilitating the description of the contents of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Example 1

[0026] like Figure 1 As shown, a hole depth and step height measuring tool includes: a first rod 1, a first reference body 2, a vernier 3, a second rod 4, and a second reference body 5. The first reference body 2 is connected to the end of the first rod 1 and serves as a zero-position reference. The vernier 3 is slidably disposed on the first rod 1 and is used to measure dimensions. The second rod 4 is connected to the vernier 3, and the second reference body 5 is connected to the second rod 4 and is used to contact another surface to be measured.

[0027] Specifically, this height gauge is modified using a digital display vernier caliper. Vernier 3 directly adopts the digital display vernier of the digital display vernier caliper. In addition to the power on / off and measurement functions, the digital display vernier also has a zeroing calibration function.

[0028] Specifically, such as Figure 1 As shown, the first reference body 2 is a block body. The first reference body 2 is connected to one end of the first rod body 1. The end face of the first reference body 2 away from the vernier 3 is the first reference surface. The same end of the second reference body 5 is the second reference surface. The first reference surface and the second reference surface are coplanar in the initial state. At this time, the vernier 3 is zeroed. The change in the position of the second reference surface relative to the first reference surface is the distance value to be measured.

[0029] Specifically, such as Figure 1 As shown, the vernier 3 is slidably disposed on the first rod 1 along the X direction, and the second reference body 5 is slidably disposed on the second rod 4 along the Y direction. The X direction is perpendicular to the Y direction. The slidable second reference body 5 facilitates the adjustment of the position of the second reference body 5 relative to the first connecting rod, thereby improving the usability of this type of inspection tool.

[0030] Specifically, as shown in Figure 1 The cursor 3 is slidably arranged along the length of the first rod body 1, which is the basic function of the original digital cursor. The second rod body 4 is connected to the cursor 3, such as bolt connection, adhesion, etc. The second reference body 5 includes a sliding block 501 and a positioning needle 502. The positioning needle 502 is connected to the sliding block 501. The sliding block 501 is provided with a sliding channel and is slidably arranged in the second rod body 4 through the sliding channel. In this way, the distance between the positioning needle 502 and the cursor 3 can be adjusted, so that the gauge is more suitable for measuring different structures and sizes of special-shaped holes or steps.

[0031] Specifically, as shown in Figure 1 The hole depth and step height gauge further comprises a locking piece 6 connected to the second reference body 5. The locking piece 6 is used to position the second reference body 5 on the second rod body 4, thereby improving the stability of the positioning of the second reference body 5.

[0032] Specifically, as shown in Figure 1 The locking piece 6 is a bolt. The sliding block 501 is provided with a threaded hole corresponding to the locking piece 6. The locking piece 6 is threadedly connected to the threaded hole of the sliding block 501. When the end of the locking piece 6 is pressed against the second rod body 4, the positioning needle 502 is fixed. When the locking piece 6 is not in contact with the second rod body 4, the sliding block 501 can freely slide on the second rod body 4.

[0033] Specifically, as shown in Figure 1 The height gauge further comprises a limiting piece 7 connected to the second rod body 4. The limiting piece 7 is used to limit the second reference body 5 on the second rod body 4, thereby preventing the second reference body 5 from falling off the second rod body 4.

[0034] Specifically, as shown in Figure 1 The limiting piece 7 is a bolt. The bolt is connected to the end of the second rod body 4. The head of the bolt limits the sliding block 501 to remain on the second rod body 4.

[0035] The meaning of hole depth or step height is the distance value between two positions (set as first position and second position). Therefore, the hole depth and step height gauge has the following use method:

[0036] S1, place the lower end faces of the first reference body 2 and the second reference body 5 on the same plane to ensure that the first reference surface and the second reference surface are flush, and then correct the zero through the zero button of the cursor 3;

[0037] S2, according to the state of the first position and the second position, select a position suitable for placing the first reference body 2 to place the first reference body 2;

[0038] S3. Align the positioning pin 502 with the second position;

[0039] S4. Read the value of cursor 3.

[0040] Therefore, this type of gauge can be used to measure the depth of irregular holes and the height of steps.

[0041] Example 2

[0042] Based on Example 1, such as Figure 2 As shown, in Embodiment 2, the first reference body 2 is improved.

[0043] Specifically, such as Figure 2 As shown, the first reference body 2 is a magnetic structure, which improves the stability of the fixture positioning.

[0044] Specifically, such as Figure 2 As shown, the magnetic attraction structure includes: a first connecting block 201, a second connecting block 202, and a magnet 203. The first connecting block 201 is connected to the end of the first rod body 1, the second connecting block 202 is connected to the first connecting block 201, and the magnet 203 is connected to the second connecting block 202.

[0045] Specifically, such as Figure 2 As shown, the first connecting block 201 has a tapered end, and the second connecting block 202 has a corresponding tapered groove. The tapered end is inserted into the tapered groove. The second connecting block 202 is connected to the first connecting block 201 by bolts. Since the tapered mating structure has good self-centering properties, the gap at the connection position can be eliminated after the tapered structure is connected, thereby improving the stability of the structure.

[0046] Specifically, such as Figure 2 As shown, the second connecting block 202 has an annular groove on its outer periphery. The magnet 203 has a circular structure and is fitted into the groove. The magnetic attraction structure also includes a pressure cap 204, which is connected to the second connecting block 202 and limits the magnet 203 in the groove. Through the annular magnet 203, the first reference block 2 has uniform and good adsorption performance, so that the gauge can be more stably positioned on the cylinder liner being measured.

[0047] Example 3

[0048] Based on Example 1 or 2, such as Figure 3 As shown, in Embodiment 3, the connection between the positioning pin 502 and the second rod 4 is further improved, and the positioning pin 502 is slidably disposed on the second rod 4 along the X direction.

[0049] Specifically, such as Figure 3As shown, the slider 501 has a connecting sleeve 503 outside, the connecting sleeve 503 is a threaded sleeve, the positioning needle 502 is screwed on the connecting sleeve 503, and the positioning needle 502 is provided with a dimpling surface on the outer periphery, facilitating the operator to rotate the positioning needle 502.

[0050] The reason for designing such structure is that on one hand, the distance of measurement can be expanded, and on the other hand, the positioning needle 502 can be conveniently accommodated, avoiding the positioning needle 502 from being too long when the gauge is not used.

[0051] The above is only an embodiment of the present application, and the common knowledge of specific structures and properties in the scheme is not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the filing date or the priority date, can know all the prior art in the field, and has the ability to apply conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration given by the present application, some typical known structures or known methods should not be an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application.

Claims

1. A hole depth and step height gauge, characterized by, The utility model relates to a vernier caliper, comprising: a first rod body; a first reference body connected to an end of the first rod body, the first reference body serving as a zero reference; a vernier slidingly arranged on the first rod body, the vernier being used for measuring a size; a second rod body connected to the vernier; a second reference body connected to the second rod body, the second reference body being used for contacting another surface to be measured.

2. The bore depth and step height gauge of claim 1, wherein, The vernier is slidingly arranged on the first rod body along an X direction, and the second reference body is slidingly arranged on the second rod body along a Y direction, the X direction being perpendicular to the Y direction.

3. The bore depth and step height gauge of claim 1, wherein, Further comprising: an anti-loosening member connected to the second reference body, the anti-loosening member being used for positioning the second reference body on the second rod body.

4. The bore depth and step height gauge of claim 1, wherein, Further comprising:

5. The bore depth and step height gage of claim 1, wherein, a limiting member connected to the second rod body, the limiting member being used for limiting the second reference body on the second rod body.

6. The bore depth and step height gage of claim 2, wherein, The first reference body is a magnetic attraction structure. The second reference body comprises a positioning needle slidingly arranged on the second rod body along the X direction.

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