A device for measuring the inner diameter of a hole

Abstract

The present invention relates to a device for measuring the inner diameter of a hole, comprising: a base; a mounting seat which can move along a first linear direction, the mounting seat includes a reference plane, and the mounting seat can rotate around a first axis; at least two pneumatic probes, the pneumatic probes rotate and move along with the mounting seat, the pneumatic probes can rotate relative to the mounting seat around a rotation axis perpendicular to their own axis and parallel to the reference plane, the pneumatic probes can rotate relative to the mounting seat until the axis is perpendicular to the reference plane or the axis is parallel to the reference plane, when the pneumatic probes rotate along with the mounting seat in the state where the axis is parallel to the reference plane, they can rotate until the axis coincides with a reference axis parallel to the first linear direction. The present application can complete the measurement of an inner hole with multiple different inner diameters at one station through multiple different pneumatic probes, reduce the number of layout stations of the pneumatic probes to reduce the space occupation, and can complete the switching of the pneumatic probes in a smaller space, further reducing the space occupation of the device.

Description

Technical Field

[0001] The present invention relates to the field of part detection technology, and particularly relates to a device for measuring the inner diameter of a hole. Background Art

[0002] In various mechanical equipment, there are various parts with inner holes. The accuracy of the inner holes of the parts will affect the mating accuracy with the mating parts and is related to the running stability of the mechanical equipment. Therefore, the accuracy detection of the inner holes is crucial.

[0003] The detection of the inner diameter of the part is generally carried out by a pneumatic probe. To improve the measurement accuracy, the difference between the diameter of the pneumatic probe and the inner diameter of the measured inner hole needs to be within a suitable range. Therefore, for a part with inner holes having two different inner diameters as shown in Figure 1 , when detecting the inner holes, two different specifications of pneumatic probes need to be used to measure the two sections with different inner diameters of the inner hole respectively. Currently, usually different specifications of pneumatic probes are respectively installed in different workstations, and the measured part is conveyed through a conveying device through multiple workstations, and at each workstation, a corresponding pneumatic probe measures the inner diameter of a section of the inner hole of the part.

[0004] For parts with multiple sections of different inner diameters in the inner hole, multiple pneumatic probes need to be correspondingly set, and each pneumatic probe is correspondingly set in a workstation, resulting in a large number of workstations and a large space occupation. Summary of the Invention

[0005] Based on the above description, the present invention provides a device for measuring the inner diameter of a hole to solve the problem in the related technology that for parts with multiple sections of different inner diameters in the inner hole, multiple pneumatic probes need to be correspondingly set, and each pneumatic probe is correspondingly set in a workstation, resulting in a large number of workstations and a large space occupation.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] The present application provides a device for measuring the inner diameter of a hole, and the technical solution adopted is as follows:

[0008] A device for measuring the inner diameter of a hole, comprising:

[0009] A base;

[0010] A mounting seat, which is connected to the base and can move relative to the base along a first straight line direction. The mounting seat includes a reference plane parallel to the first straight line direction, and the mounting seat can rotate relative to the base around a first axis perpendicular to the reference plane;

[0011] At least two pneumatic probes connected to the mounting base, the pneumatic probes rotate around a first axis and move along a first linear direction with the mounting base, at least two of the pneumatic probes are circumferentially spaced along the first axis, the pneumatic probe can rotate relative to the mounting base around a rotation axis perpendicular to its own axis and parallel to the reference plane, the pneumatic probe can rotate relative to the mounting base until its axis is perpendicular to the reference plane or its axis is parallel to the reference plane, when the pneumatic probe rotates with the mounting base in a state where its axis is parallel to the reference plane, it can rotate until its axis coincides with a reference axis parallel to the first linear direction.

[0012] Preferably, at least two of the pneumatic probes are respectively connected to the mounting base through connecting seats, the connecting seats can rotate relative to the mounting base to make the pneumatic probes rotate relative to the mounting base, and a first driving member for driving the connecting seats to rotate is provided between the connecting seats and the mounting base.

[0013] Preferably, the pneumatic probe can rotate around its own axis relative to the connecting seat.

[0014] Preferably, a support member for supporting the part to be measured is provided on the base, the support member and the mounting base are spaced apart in the first linear direction, and when the axis of the pneumatic probe coincides with the reference axis, the pneumatic probe is located between the support member and the mounting base in the first linear direction.

[0015] Preferably, the support member can move relative to the base along the first linear direction.

[0016] Preferably, the mounting base is connected to the base through a connection structure, the connection structure includes a support base, a second driving member and a third driving member, the support base can move relative to the base along the first linear direction, the second driving member connects the base and the support base and is used to drive the support base to move relative to the base along the first linear direction, the mounting base is connected to the support base through the second driving member, and the second driving member is used to drive the mounting base to rotate around the first axis relative to the support base.

[0017] Preferably, two first travel switches are provided on the base, the two first travel switches are spaced apart along the first linear direction, a triggering member for triggering the first travel switches is connected to the support base, when the first travel switches are triggered, they send signals to the control system, and when the control system receives the first travel switch signals, it controls the second driving member to stop running.

[0018] Preferably, the third driving member includes a rotary cylinder.

[0019] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects:

[0020] 1. In the present application, by providing a mounting base and at least two pneumatic probes, when a pneumatic probe rotates relative to the mounting base until its axis is parallel to the reference plane and then rotates with the mounting base until its axis coincides with the reference axis, the pneumatic probe is in a working state. It can be moved along the first straight line direction by the mounting base to drive the pneumatic probe to move into the inner hole of the part for inner hole diameter measurement. By rotating the mounting base around the first axis, different pneumatic probes can be in a working state where their axes coincide with the reference axis, so as to switch different pneumatic probes to measure inner holes with different diameters, that is, to complete the measurement of an inner hole with multiple different inner diameters at one station through multiple different pneumatic probes, thereby reducing the number of layout stations of the pneumatic probes and reducing the space occupation. Moreover, through the setting that the pneumatic probe can rotate relative to the mounting base, when switching different pneumatic probes, all pneumatic probes can be rotated until their axes are perpendicular to the reference plane, that is, the axis of the pneumatic probe is parallel to the first axis, so as to reduce the space required for the pneumatic probe to rotate with the mounting base around the first axis, and the switching of the pneumatic probe can be completed in a smaller space, further reducing the space occupation of the device.

[0021] 2. In the present application, the pneumatic probe is connected to the mounting base through a connecting seat and is driven to rotate by a first driving member, which is convenient for controlling the rotation of the pneumatic probe. The setting that the pneumatic probe can rotate relative to the connecting seat around its own axis enables the pneumatic probe to rotate relative to the measured part when entering the inner hole for measurement, so as to improve the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the drawing of the background art of the present invention;

[0023] Figure 2 It is the structural schematic diagram of the inner hole diameter measuring device provided by the embodiment of the present invention;

[0024] Figure 3 It is the structural schematic diagram of another perspective of the inner hole diameter measuring device provided by the embodiment of the present invention.

[0025] Description of the reference numerals:

[0026] 1. Base; 2. Mounting base; 3. Pneumatic probe; 4. Connecting seat; 5. First driving member; 6. Support seat; 7. Second driving member; 8. Third driving member; 9. First travel switch; 10. Triggering member; 11. Second travel switch; 12. Support member; 13. Linear cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] It can be understood that spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over" etc. can be used herein to describe the relationship of one element or feature shown in the figure with other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the figure is flipped, an element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial descriptive terms used herein are correspondingly interpreted.

[0030] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transfer between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0031] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0032] Refer to Figure 2-3 As shown, an embodiment of the present application provides a hole inner diameter measuring device, which includes a base 1, a mounting base 2 and at least two pneumatic probes 3.

[0033] Refer to Figure 2-3As shown in the figure, the base 1 is used to be fixed on the inspection table, the mounting seat 2 is connected to the base 1, and the pneumatic probe 3 is connected to the mounting seat 2. The mounting seat 2 can move relative to the base 1 along the first linear direction. The mounting seat 2 includes a reference plane parallel to the first linear direction, and the mounting seat 2 can rotate relative to the base 1 about a first axis perpendicular to the reference plane. The pneumatic probe 3 rotates and moves along the first linear direction with the mounting seat 2. At least two pneumatic probes 3 are circumferentially spaced along the first axis. The pneumatic probe 3 can rotate relative to the mounting seat 2 about a rotation axis perpendicular to its own axis and parallel to the reference plane. The pneumatic probe 3 can rotate relative to the mounting seat 2 until its axis is perpendicular to the reference plane or its axis is parallel to the reference plane. When the pneumatic probe 3 rotates with the mounting seat 2 in the state where its axis is parallel to the reference plane, it can rotate until its axis coincides with the reference axis parallel to the first linear direction.

[0034] With the above settings, when a pneumatic probe 3 rotates relative to the mounting seat 2 until its axis is parallel to the reference plane and then rotates with the mounting seat 2 until its axis coincides with the reference axis, this pneumatic probe 3 is in the working state. It can move along the first linear direction through the mounting seat 2, driving this pneumatic probe 3 to move and insert into the inner hole of the part to perform the inner hole diameter measurement work. By rotating the mounting seat 2 about the first axis, different pneumatic probes 3 can be in the working state where their axes coincide with the reference axis, so as to switch different pneumatic probes 3 to measure inner holes with different diameters, that is, at one station, the measurement of an inner hole with multiple different inner diameters is completed by multiple different pneumatic probes 3, thereby reducing the number of layout stations of the pneumatic probes 3 to reduce the space occupation. Moreover, through the setting that the pneumatic probe 3 can rotate relative to the mounting seat 2, when switching different pneumatic probes 3, all pneumatic probes 3 can be rotated until their axes are perpendicular to the reference plane, that is, the axes of the pneumatic probes 3 are parallel to the first axis, thereby reducing the space required for the pneumatic probe 3 to rotate with the mounting seat 2 about the first axis, and the switching of the pneumatic probe 3 can be completed in a smaller space, further reducing the space occupation of the device.

[0035] Refer to Figure 2-3 As shown in the figure, to realize the rotatable installation of the pneumatic probe 3 on the mounting seat 2, at least two pneumatic probes 3 are respectively connected to the mounting seat 2 through the connecting seat 4. The connecting seat 4 can rotate relative to the mounting seat 2 to make the pneumatic probe 3 rotate relative to the mounting seat 2. A first driving member 5 for driving the connecting seat 4 to rotate is provided between the connecting seat 4 and the mounting seat 2. Specifically, the first driving member 5 can adopt a rotary cylinder. The rotary cylinder is fixed on the mounting seat 2, and the connecting seat 4 is connected to the output shaft of the rotary cylinder to drive the connecting seat 4 to rotate through the rotary cylinder, realizing the function of driving the pneumatic probe 3 to rotate relative to the connecting seat 4 and facilitating the realization of automatic control.

[0036] Refer to Figure 2-3As shown in the figure, when the pneumatic probe 3 is installed on the connecting seat 4, the pneumatic probe 3 can rotate relative to the connecting seat 4 around its own axis. Specifically, the connecting seat 4 is provided with a mounting hole, and a fixing sleeve is sleeved outside the pneumatic probe 3. The fixing sleeve is located in the mounting hole and fixed to the connecting seat 4. The pneumatic probe 3 passes through the fixing sleeve and is connected to the fixing sleeve through a plain bearing, so that the pneumatic probe 3 can rotate relative to the fixing sleeve and the connecting seat 4.

[0037] Referring to Figure 2-3 As shown in the figure, further, the reference axis is set to intersect with the first axis, and when the pneumatic probe 3 is arranged, when the axis of the pneumatic probe 3 is parallel to the reference plane, the axis of the pneumatic probe 3 intersects with the first axis, so as to ensure that each pneumatic probe 3 can rotate to coincide with the reference axis with the mounting seat 2 when the axis is parallel to the reference plane.

[0038] In this embodiment, two pneumatic probes 3 are shown for illustration. The two pneumatic probes 3 are respectively located on opposite sides of the mounting seat 2.

[0039] Referring to Figure 2-3 As shown in the figure, further, the mounting seat 2 is connected to the base 1 through a connecting structure. The connecting structure includes a support seat 6, a second driving member 7 and a third driving member 8. The support seat 6 can move relative to the base 1 along a first straight line direction. The second driving member 7 is connected to the base 1 and the support seat 6 and is used to drive the support seat 6 to move relative to the base 1 along the first straight line direction. The mounting seat 2 is connected to the support seat 6 through the second driving member 7. The second driving member 7 is used to drive the mounting seat 2 to rotate relative to the support seat 6 around the first axis. Specifically, the second driving member 7 adopts a linear module, which is fixed on the base 1, then the support seat 6 is fixed to the slide of the linear module to drive the support seat 6 to move along the first straight line direction through the linear module; the third driving member 8 adopts a rotary cylinder, which is fixed on the support seat 6. Correspondingly, the mounting seat 2 is fixed to the output shaft of the rotary cylinder to drive the mounting seat 2 to rotate through the rotary cylinder.

[0040] Referring to Figure 2-3As shown in the figure, to achieve precise control over the moving stroke of the support base 6, two first travel switches 9 are provided on the base 1. The two first travel switches 9 are spaced apart along the first straight line direction. A trigger member 10 for triggering the first travel switches 9 is connected to the support base 6. When the first travel switches 9 are triggered, they send signals to the control system. When the control system receives the signals from the first travel switches 9, it controls the second driving member 7 to stop operating. In the design, the two first travel switches 9 are respectively arranged at the starting position and the working position of the moving path of the support base 6. When the support base 6 moves to the corresponding position, the corresponding first travel switch 9 is triggered. After the control system receives the signals from the first travel switches 9, it controls the second driving member 7 to stop moving, thereby achieving precise control over the stroke of the support base 6. In this embodiment, it is illustrated that the first travel switches 9 are fixed on the base of the linear module, and the trigger member 10 is fixed to the support base 6 by using a trigger plate.

[0041] Referring to Figure 2-3 As shown in the figure, further, a second travel switch 11 is also fixed on the base of the linear module. The second travel switch 11 is located between the two first travel switches 9, and the trigger member 10 is also used to trigger the second travel switch 11. The second travel switch 11 is close to the starting position of the moving path of the support base 6. The second travel switch 11 is configured to send a signal to the control system when triggered by the trigger member 10. The control system controls the pneumatic probe 3 to start or close according to the signal from the second travel switch 11. Specifically, during the working stroke of the support base 6, when the support base 6 moves from the starting position to the working position and triggers the second travel switch 11, the control system controls the pneumatic probe 3 to start, so that when the support base 6 reaches the working position, the inner hole diameter can be measured by the pneumatic probe 3. On the contrary, during the reset stroke of the support base 6, when the support base 6 moves from the working position to the starting position and triggers the second travel switch 11, the control system controls the pneumatic probe 3 to close.

[0042] Referring to Figure 2-3As shown in the figure, further, a support member 12 for supporting the part to be measured is provided on the base 1. The support member 12 and the mounting base 2 are spaced apart in the first linear direction. When the axis of the pneumatic probe 3 coincides with the reference axis, the pneumatic probe 3 is located between the support member 12 and the mounting base 2 in the first linear direction. The support member 12 is movable relative to the base 1 along the first linear direction. In this embodiment, the support member 12 is a cylindrical support block coaxial with the reference axis to stably support the part to be measured; moreover, the support member 12 is arranged to be movable relative to the base 1 along the first linear direction. Correspondingly, a linear cylinder 13 is installed on the base 1 to drive the support member 12 to move. Specifically, in the design, the measuring device of the present application can be matched with a turntable conveying device, so that the support member 12 and the mounting base 2 are respectively located on both sides of the turntable in the vertical direction. The part to be measured is conveyed by the turntable conveying device to between the pneumatic probes 3 on the support member 12 and the mounting base 2. The part to be measured is supported by the support member 12 on one side of the turntable to ensure that the pneumatic probe 3 on the other side of the turntable can be smoothly inserted into the inner hole of the part to be measured for measurement. Through this setting, the inner hole diameter measuring device of the present application can be matched with other devices to realize the automation of part detection work, thereby improving work efficiency.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring the inner diameter of a hole, characterized in that, Comprising: Base (1); Mounting base (2), which is connected to the base and can move relative to the base (1) along a first linear direction. The mounting base (2) includes a reference plane parallel to the first linear direction, and the mounting base (2) can rotate relative to the base (1) about a first axis perpendicular to the reference plane; At least two pneumatic probes (3) connected to the mounting base (2). The pneumatic probes (3) rotate and move along the first linear direction with the mounting base (2). At least two of the pneumatic probes (3) are circumferentially spaced along the first axis. The pneumatic probe (3) can rotate relative to the mounting base (2) about a rotation axis perpendicular to its own axis and parallel to the reference plane. The pneumatic probe (3) can rotate relative to the mounting base (2) until its axis is perpendicular to the reference plane or its axis is parallel to the reference plane. When the pneumatic probe (3) rotates with the mounting base (2) in the state where its axis is parallel to the reference plane, it can rotate until its axis coincides with a reference axis parallel to the first linear direction; At least two of the pneumatic probes (3) are respectively connected to the mounting base (2) through connecting seats (4). The connecting seats (4) can rotate relative to the mounting base (2) to enable the pneumatic probes (3) to rotate relative to the mounting base (2). A first driving member (5) for driving the connecting seat (4) to rotate is provided between the connecting seat (4) and the mounting base (2).

2. The inner diameter measuring device for holes according to claim 1, wherein: The pneumatic probe (3) can rotate relative to the connecting seat (4) about its own axis.

3. The hole inner diameter measuring device according to claim 1, characterized in that: A support member (12) for supporting the part to be measured is provided on the base (1). The support member (12) and the mounting base (2) are spaced apart in the first linear direction. And when the axis of the pneumatic probe (3) coincides with the reference axis, the pneumatic probe (3) is located between the support member (12) and the mounting base (2) in the first linear direction.

4. The inner diameter measuring device for holes according to claim 3, characterized in that: The support member (12) can move relative to the base (1) along the first linear direction.

5. The hole inner diameter measuring device according to claim 1, wherein: The mounting base (2) is connected to the base (1) through a connecting structure. The connecting structure includes a support seat (6), a second driving member (7) and a third driving member (8). The support seat (6) can move relative to the base (1) along the first linear direction. The second driving member (7) connects the base (1) and the support seat (6) and is used to drive the support seat (6) to move relative to the base (1) along the first linear direction. The mounting base (2) is connected to the support seat (6) through the second driving member (7). The second driving member (7) is used to drive the mounting base (2) to rotate relative to the support seat (6) about the first axis.

6. The inner diameter measuring device for holes according to claim 5, wherein: Two first travel switches (9) are provided on the base (1). The two first travel switches (9) are spaced apart along a first straight line direction. A trigger member (10) for triggering the first travel switch (9) is connected to the support base (6). When the first travel switch (9) is triggered, it sends a signal to the control system. When the control system receives the signal of the first travel switch (9), it controls the second driving member (7) to stop operating.

7. The inner diameter measuring device for holes according to claim 5, characterized in that: The third driving member (8) includes a rotary cylinder.

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