A device for online measurement of hub center hole diameter

Abstract

The present invention provides a device for online measurement of the diameter of the center hole of a wheel hub, which includes a washer, a storage plate, a bracket, a hollow bottom plate, a base, a sensor branch pipe, an annular seat, a test bench seat, a measuring needle, an O-ring, a protective cover, a nut, a positioning stud, a column, a sensor, an annular groove seat, a sealing joint, a hose, a wire, a fence, a signal processor, an industrial computer, and an air source. The wheel hub is placed on the upper surface of the test bench seat, and the measuring needle is squeezed by the inner wall of the center hole of the wheel hub to produce elastic deformation, and the elastic deformation is proportionally transmitted to the sensor through the positioning stud and the column. The sensor outputs a signal to the signal processor, and the signal processor processes the signal and displays the measured size value obtained on the display of the industrial computer. The device of the present invention ensures that when the center hole diameter is found to be out of tolerance, the out-of-tolerance value can be immediately fed back to compensate for the processing program of the next wheel hub, thereby greatly reducing the machining scrap rate of the wheel hub.

Description

Technical Field

[0001] The invention relates to the field of online measurement of wheel hub dimensions, and in particular to a device for online measurement of the diameter of a wheel hub center hole. Background Art

[0002] During the machining process of the wheel hub, it is necessary to control the relevant dimensions so that they are within the tolerance range. The center hole is the location where assembly is required, so the dimensional tolerance of the center hole diameter is usually the most stringent. The inspection method usually adopts three-coordinate random inspection or one hundred inspection with a through gauge. The three-coordinate random inspection is offline, resulting in a batch of waste products with out-of-tolerance center hole diameters when a product is found, causing inevitable economic losses. Even if the one hundred inspection with a through gauge is adopted, a batch of waste products with out-of-tolerance center hole diameters are still produced for the entire production line.

[0003] If the deviation value can be immediately fed back to compensate for the next hub processing procedure when a center hole deviation defect is found, the hub machining defect rate will be greatly reduced. Summary of the invention

[0004] The purpose of the present invention is to provide a device for online measuring the diameter of the center hole of a wheel hub, so as to solve the above-mentioned problems existing at this stage.

[0005] In one aspect of the present invention, a device for online measuring the diameter of a hub center hole is provided, which comprises a washer (1), a storage plate (2), a bracket (3), a hollow bottom plate (4), a base (6), a sensor branch pipe (7), an annular seat (8), a measuring platform seat (9), a measuring needle (10), an O-ring (11), a protective cover (12), a nut (13), a positioning stud (14), a column (15), a sensor (16), an annular groove seat (17), a sealing joint (18), a hose (19), a wire (20), a fence (21), a signal processor (22), an industrial computer (23), and an air source (24).

[0006] The annular seat (8) is composed of an annular seat I (8-1) and an annular seat II (8-2). The measuring platform seat (9) comprises positioning ribs (9-1), countersunk holes (9-2), air blowing holes I (9-3), measuring pin holes (9-4), air blowing holes II (9-5), annular air grooves (9-6), air paths I (9-7), air paths II (9-8), etc.

[0007] The device is provided with four brackets (3) which are arranged in a square and centrally symmetrical manner, and a pad iron (1) is installed at the lower end of each bracket (3), a hollow bottom plate (4) is welded and installed at the upper end of the bracket (3), a fence (21) is welded around the hollow bottom plate (4), a storage plate (2) is installed on the bracket (3) and directly under the fence (21), a base (6) is installed on the upper surface of the hollow bottom plate (4) by screw connection, and an annular seat I (8-1) and annular seat II (8-2) are fixedly installed on the bottom by horizontal thread connection. The annular groove seat (17) is fixed to the upper step of the base (6) and above the annular seat (8) by a plurality of screws. The measuring platform (9) is fixed to the annular groove seat (17) by threaded connection through the countersunk hole (9-2). The sensor branch pipe (7) is fixed to the lower surface of the annular groove seat (17) by threaded connection. Two columns (15) are symmetrically installed on the upper surface of the sensor branch pipe (7) along the diameter direction. Two positioning studs (14) are respectively installed in the threaded holes at the upper ends of the corresponding columns (15) and are fixed with nuts. (13) are locked from the inner side of the corresponding columns (15), the two measuring pins (10) are respectively installed on the studs of the two positioning studs (14) so ​​as to be arranged symmetrically in the diameter direction, and the measuring pins (10) pass through the measuring pin holes (9-4) on the measuring platform (9) and contact the inner wall of the center hole of the hub (5), the sensor (16) is horizontally installed between the lower ends of the two columns (15) and connects the two columns (15), the protective cover (12) is installed on the through hole at the upper end of the measuring platform (9), and the protective cover (12) is installed on the outer periphery of the protective cover (12). An O-ring (11) is installed between the groove on the wall and the inner wall of the through hole at the upper end of the test bench (9). The sealing joint (18) is screwed to the threaded hole of the gas path II (9-8) on the test bench (9) through a threaded connection. The hose (19) is respectively connected and fixed to the sealing joint (18) and the output port of the gas source (24). One end of the wire (20) passes through the side wall of the base (6) and the sensor branch pipe (7) to connect with the sensor. The other end of the wire (20) is connected to the signal processor (22), and the signal processor (22) is connected to the industrial computer (23).

[0008] In actual use, the air source (24) transmits air pressure to the measuring platform (9) through the hose (19) and the sealing joint (18), and transmits air pressure to the measuring pin hole (9-4) through the air path II (9-8), the annular air groove (9-6), the air path I (9-7), and the air blowing hole II (9-5), and transmits air pressure to the upper surface of the positioning rib (9-1) through the air path II (9-8), the annular air groove (9-6), the air path I (9-7), and the air blowing hole I (9-3), so as to blow away impurities such as aluminum chips and emulsion, and the robot arm The wheel hub (5) is clamped and placed on the upper surface of the measuring platform (9), so that the measuring needle (10) is squeezed by the inner wall of the center hole of the wheel hub (5) to produce elastic deformation, and the elastic deformation is proportionally transmitted to the sensor (16) through the positioning stud (14) and the column (15). The sensor (16) outputs a corresponding signal to the signal processor (22). The signal processor (22) processes the signal output by the sensor (16) and displays the measured dimension value obtained thereby on the display of the industrial computer (23).

[0009] The design structure of the air vent inside the measuring platform (9) of the device of the present invention is smart and reasonable, which enables the air pressure to be transmitted to the positioning rib (9-1) and the measuring pin hole (9-4) where aluminum chips and emulsion are likely to gather, thereby blowing away the impurities and avoiding measurement errors caused by inaccurate positioning.

[0010] Preferably, the upper end of the measuring platform (9) of the device of the present invention is designed to be a conical surface, so that the wheel hub (5) is easier to place. Four positioning ribs (9-1) are arranged on the measuring platform (9) in the same height plane, which avoids the use of a method in which a larger overall plane contacts the flange plane of the wheel hub (5). The arrangement of the positioning ribs (9-1) of the device of the present invention can ensure that less impurities such as aluminum chips and emulsion remain, which is conducive to ensuring accuracy.

[0011] Preferably, the protective cover (12) of the device of the present invention is made of nylon or plastic, which can avoid scratching the wheel hub (5). At the same time, the part of the protective cover (12) that extends into the upper through hole of the measuring platform (9) is interference fit with the upper through hole of the measuring platform (9), and an O-ring (11) can be added, so that the internal air pressure of the measuring platform (9) can be maintained at a certain level, so that impurities will not enter the interior of the measuring platform (9), thereby further ensuring the measurement accuracy.

[0012] Preferably, the sensor (16) may be an inductive displacement sensor, so that the measurement stability and accuracy are higher.

[0013] Preferably, the head of the measuring needle (10) of the device of the present invention that contacts the inner wall of the center hole of the hub (5) is made of hard alloy material or other wear-resistant material, thereby ensuring that it still has high dimensional accuracy after long-term use.

[0014] Preferably, the impurities such as aluminum chips and emulsion blown off by the present invention can be collected on the receiving plate (2) through the fence (21), and the receiving plate (2) can be cleaned regularly to ensure the cleanliness of the device.

[0015] The solution provided by the present invention ensures that when the center hole diameter is found to be out of tolerance, the out-of-tolerance value can be immediately fed back to compensate for the processing procedure of the next wheel hub, thereby greatly reducing the wheel hub machining scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 is a cross-sectional view of the device for online measuring the diameter of the center hole of a wheel hub according to the present invention in an assembled state;

[0018] Figure 2 is a partial cross-sectional view of the device for online measuring the diameter of the center hole of a wheel hub according to the present invention in an assembled state;

[0019] Figure 3 is a stereoscopic view of a measuring platform of the device for online measuring the diameter of the center hole of a wheel hub according to the present invention;

[0020] Figure 4 is another stereoscopic view of the measuring stand of the device for online measuring the diameter of the center hole of a wheel hub according to the present invention;

[0021] Figure 5 is a cross-sectional view of a measuring stand of a device for online measuring the diameter of a hub center hole according to the present invention;

[0022] Figure 6 It is a perspective view of the annular seat of the device for online measuring the diameter of the center hole of the hub according to the present invention.

[0023] Figure numerals: 1 - washer, 2 - storage plate, 3 - bracket, 4 - hollow bottom plate, 5 - wheel hub, 6 - base, 7 - sensor branch pipe, 8 - annular seat, 9 - measuring platform seat, 10 - measuring needle, 11 - O-ring, 12 - protective cover, 13 - nut, 14 - positioning stud, 15 - column, 16 - sensor, 17 - annular groove seat, 18 - sealing joint, 19 - hose, 20 - wire, 21 - fence, 22 - signal processor, 23 - industrial computer, 24 - air source.

[0024] 8-1——annular seat I, 8-2——annular seat II, 9-1——positioning rib, 9-2——countersunk hole, 9-3——air blowing hole I, 9-4——gauge pin hole, 9-5——air blowing hole II, 9-6——annular air groove, 9-7——air path I, 9-8——air path II. DETAILED DESCRIPTION

[0025] Example 1

[0026] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] According to an embodiment of the present invention, a device for online measuring the diameter of a hub center hole comprises a washer (1), a receiving plate (2), a bracket (3), a hollow bottom plate (4), a base (6), a sensor branch pipe (7), an annular seat (8), a measuring platform seat (9), a measuring needle (10), an O-ring (11), a protective cover (12), a nut (13), a positioning stud (14), a column (15), a sensor (16), an annular groove seat (17), a sealing joint (18), a hose (19), a wire (20), a fence (21), a signal processor (22), an industrial computer (23), and an air source (24).

[0028] The annular seat (8) is composed of an annular seat I (8-1) and an annular seat II (8-2). The measuring platform seat (9) includes a positioning rib (9-1), a countersunk hole (9-2), an air blowing hole I (9-3), a measuring pin hole (9-4), an air blowing hole II (9-5), an annular air groove (9-6), an air path I (9-7), an air path II (9-8), etc.

[0029] The device is provided with four brackets (3) which are arranged in a square and centrally symmetrical manner, and a pad iron (1) is installed at the lower end of each bracket (3), a hollow bottom plate (4) is welded and installed at the upper end of the bracket (3), a fence (21) is welded around the hollow bottom plate (4), a storage plate (2) is installed on the bracket (3) and directly below the fence (21), a base (6) is installed on the upper surface of the hollow bottom plate (4) by screw connection, and an annular seat I (8-1) and an annular seat II (8-2) are fixedly installed on the bottom plate by horizontal thread connection. The annular groove seat (17) is fixed to the upper step of the base (6) and above the annular seat (8) by a plurality of screws. The measuring platform (9) is fixed to the annular groove seat (17) by threaded connection through the countersunk hole (9-2). The sensor branch pipe (7) is fixed to the lower surface of the annular groove seat (17) by threaded connection. Two columns (15) are symmetrically installed on the upper surface of the sensor branch pipe (7) along the diameter direction. Two positioning studs (14) are respectively installed in the threaded holes at the upper ends of the corresponding columns (15) and are fixed with nuts. (13) are locked from the inner side of the corresponding columns (15), the two measuring pins (10) are respectively installed on the studs of the two positioning studs (14) so ​​as to be arranged symmetrically in the diameter direction, and the measuring pins (10) pass through the measuring pin holes (9-4) on the measuring platform (9) and contact the inner wall of the center hole of the hub (5), the sensor (16) is horizontally installed between the lower ends of the two columns (15) and connects the two columns (15), the protective cover (12) is installed on the through hole at the upper end of the measuring platform (9), and the protective cover (12) is installed on the outer periphery of the protective cover (12). An O-ring (11) is installed between the groove on the wall and the inner wall of the through hole at the upper end of the test bench (9). The sealing joint (18) is screwed to the threaded hole of the gas path II (9-8) on the test bench (9) through a threaded connection. The hose (19) is respectively connected and fixed to the sealing joint (18) and the output port of the gas source (24). One end of the wire (20) passes through the side wall of the base (6) and the sensor branch pipe (7) to connect with the sensor. The other end of the wire (20) is connected to the signal processor (22), and the signal processor (22) is connected to the industrial computer (23).

[0030] In actual use, the air source (24) transmits air pressure to the measuring platform (9) through the hose (19) and the sealing joint (18), and transmits air pressure to the measuring pin hole (9-4) through the air path II (9-8), the annular air groove (9-6), the air path I (9-7), and the air blowing hole II (9-5), and transmits air pressure to the upper surface of the positioning rib (9-1) through the air path II (9-8), the annular air groove (9-6), the air path I (9-7), and the air blowing hole I (9-3), so as to blow away impurities such as aluminum chips and emulsion, and the robot arm The wheel hub (5) is clamped and placed on the upper surface of the measuring platform (9), so that the measuring needle (10) is squeezed by the inner wall of the center hole of the wheel hub (5) to produce elastic deformation, and the elastic deformation is proportionally transmitted to the sensor (16) through the positioning stud (14) and the column (15). The sensor (16) outputs a corresponding signal to the signal processor (22). The signal processor (22) processes the signal output by the sensor (16) and displays the measured dimension value obtained thereby on the display of the industrial computer (23).

[0031] The design structure of the air vent inside the measuring platform (9) is smart and reasonable, which enables the air pressure to be transmitted to the positioning rib (9-1) and the measuring pin hole (9-4) where aluminum chips and emulsion are likely to gather, thereby blowing away the impurities and avoiding measurement errors caused by inaccurate positioning.

[0032] The upper end of the measuring platform (9) can be preferably designed to be a conical surface, so that the wheel hub (5) is easier to place. Four or more positioning ribs (9-1) are arranged on the measuring platform (9) at the same height plane, which avoids the use of a larger overall plane in contact with the flange plane of the wheel hub (5). The arrangement of the positioning ribs (9-1) can ensure that less impurities such as aluminum chips and emulsion remain, which is conducive to ensuring accuracy.

[0033] The protective cover (12) is preferably made of nylon or plastic, which can avoid scratching the wheel hub (5). At the same time, the part of the protective cover (12) that extends into the upper through hole of the measuring platform (9) is interference fit with the upper through hole of the measuring platform (9), and an O-ring (11) can be added, so that the internal air pressure of the measuring platform (9) can be maintained at a certain level, so that impurities will not enter the interior of the measuring platform (9), thereby further ensuring the measurement accuracy.

[0034] Preferably, the sensor (16) may be an inductive displacement sensor, so that the measurement stability and accuracy are higher.

[0035] Preferably, the head of the measuring needle (10) that contacts the inner wall of the center hole of the wheel hub (5) is made of hard alloy material or other wear-resistant material, thereby ensuring that it still has high dimensional accuracy after long-term use.

[0036] Preferably, the impurities such as aluminum chips and emulsion blown off by the present invention can be collected on the receiving plate (2) through the fence (21), and the receiving plate (2) can be cleaned regularly to ensure the cleanliness of the device.

[0037] The solution provided by the present invention ensures that when the center hole diameter is found to be out of tolerance, the out-of-tolerance value can be immediately fed back to compensate for the processing procedure of the next wheel hub, thereby greatly reducing the wheel hub machining scrap rate.

Claims

1. A device for online measurement of the diameter of a hub center hole, the device comprising a washer (1), a receiving plate (2), a bracket (3), a hollow bottom plate (4), a base (6), a sensor branch pipe (7), an annular seat (8), a measuring platform seat (9), a measuring needle (10), an O-ring (11), a protective cover (12), a nut (13), a positioning stud (14), a column (15), a sensor (16), an annular groove seat (17), a sealing joint (18), a hose (19), a wire (20), a fence (21), a signal processor (22), an industrial computer (23), and an air source (24), wherein: The annular seat (8) comprises a first annular seat half (8-1) and a second annular seat half (8-2); the measuring platform seat (9) comprises a positioning rib (9-1), a countersunk hole (9-2), a first blowing hole (9-3), a measuring pin hole (9-4), a second blowing hole (9-5), an annular air groove (9-6), a first air path (9-7) and a second air path (9-8); The device comprises four brackets (3), the four brackets (3) are arranged in a square and centrally symmetrical manner, the lower end of each bracket (3) is respectively installed with the washer (1), the hollow bottom plate (4) is welded and installed on the upper end of the bracket (3), the fence (21) is welded around the hollow bottom plate (4), the storage plate (2) is installed on the bracket (3) and is directly opposite to the lower side of the fence (21), the base (6) is installed on the upper surface of the hollow bottom plate (4) by screw connection, and the first annular seat half (8-1) and the second annular seat half (8-2) are screwed together in a horizontal direction. The sensor branch pipe (7) is fixedly mounted on the upper step of the base (6) by thread connection, the annular groove seat (17) is fixed on the upper step of the base (6) and above the annular seat (8) by a plurality of screws, the measuring platform seat (9) is fixedly mounted on the annular groove seat (17) by thread connection passing through the countersunk hole (9-2), the sensor branch pipe (7) is fixedly mounted on the lower surface of the annular groove seat (17) by thread connection, the two columns (15) are symmetrically mounted on the upper surface of the sensor branch pipe (7) along the diameter direction, and the two positioning studs (14) are respectively mounted on the threaded holes at the upper ends of the corresponding columns (15). The two measuring pins (10) are respectively mounted on the studs of the two positioning studs (14) so ​​as to be arranged symmetrically along the diameter direction, and the measuring pins (10) pass through the measuring pin holes (9-4) on the measuring platform (9) and contact the inner wall of the center hole of the wheel hub (5). The sensor (16) is horizontally mounted between the lower ends of the two columns (15) and connects the two columns (15). The protective cover (12) is mounted on the upper through hole of the measuring platform (9), and the O-ring (11) is mounted on the protective cover. The sealing joint (18) is screwed onto the threaded hole of the second gas path (9-8) on the test bench (9) through a threaded connection between the groove on the outer peripheral wall of the protective cover (12) and the inner wall of the upper through hole of the test bench (9), the hose (19) is respectively connected and fixed to the sealing joint (18) and the output port of the gas source (24), one end of the wire (20) passes through the side wall of the base (6) and the sensor branch pipe (7) to be connected to the sensor, and the other end of the wire (20) is connected to the signal processor (22), and the signal processor (22) is connected to the industrial computer (23); The air source (24) transmits air pressure to the measuring platform (9) through the hose (19) and the sealing joint (18), and transmits air pressure to the measuring pin hole (9-4) through the second air path (9-8), the annular air groove (9-6), the first air path (9-7), and the second air blowing hole (9-5), and transmits air pressure to the upper surface of the positioning rib (9-1) through the second air path (9-8), the annular air groove (9-6), the first air path (9-7), and the first air blowing hole (9-3); the upper end of the measuring platform (9) is a conical surface; and four positioning ribs (9-1) are arranged on the measuring platform (9) in the same height plane.

2. The device according to claim 1, characterized in that When the wheel hub (5) is placed on the upper surface of the measuring platform (9), the measuring needle (10) is squeezed by the inner wall of the center hole of the wheel hub (5) to produce elastic deformation, and the elastic deformation is proportionally transmitted to the sensor (16) through the positioning stud (14) and the column (15). The sensor (16) outputs a signal to the signal processor (22), and the signal processor (22) processes the signal to obtain a measured dimension value.

3. The device according to claim 1, characterized in that The portion of the protective cover (12) that extends into the upper through hole of the measuring platform (9) is in interference fit with the upper through hole of the measuring platform (9).

4. The device according to claim 1, characterized in that The head of the measuring needle (10) in contact with the inner wall of the center hole of the hub (5) is made of hard alloy material or wear-resistant material.

5. The device according to any one of claims 1 to 4, characterized in that The protective cover (12) is made of nylon or plastic.

6. The device according to any one of claims 1 to 4, characterized in that The sensor (16) is an inductive displacement sensor.

Images