Support arm of external diameter measuring device

Abstract

The utility model relates to the technical field of precision measuring devices, in particular to a support arm of an outer diameter measuring device. The supporting arm is arranged on a shell of the measuring device and comprises a measuring rod and an extension rod, the measuring rod is located in the shell, one end of the measuring rod extends out of the shell to be connected to the extension rod, an iron core shaft is installed on the side, away from the extension rod, of the measuring rod, a measurer is installed on the side, away from the measuring rod, of the extension rod, the interior of the shell is hollow, and an anti-rust oil cavity is formed. A connecting rod is fixed on the measuring rod, a push plate is fixed at the end part of the connecting rod, and the push plate is positioned in the anti-rust oil cavity. The push plate fixed on the measuring rod is immersed in the anti-rust oil filled in the anti-rust oil cavity, and when the support arm drives the push plate to move, the push plate is subjected to resistance of the anti-rust oil, so that the operation speed of the support arm is reduced, the signal reaction of the sensor is facilitated, and the measuring accuracy of the measuring device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision measuring devices, in particular to a support arm of an outer diameter measuring device. Background Art

[0002] The outer diameter measuring device is a device used to measure the outer diameter of a workpiece, such as the utility model patent with the authorization announcement number CN217504608U. The principle is: two measuring rods contact the workpiece to be measured, and the workpiece to be measured pushes the two measuring rods apart to expand them outward, and then the tail ends of the first lever and the second lever move inward. At this time, the compression spring contracts under the force, and the tail ends of the first lever and the second lever are displaced, causing the iron core shaft and the coil to produce relative movement, thereby generating an electrical signal, which is read by an external controller, thereby measuring the outer diameter of the workpiece to be measured.

[0003] The arm runs at a relatively fast speed, and requires a sensor with higher sensitivity to transmit signals thereto. When the sensor signal transmission is not sensitive, the measurement data is not accurate enough. Summary of the invention

[0004] In order to solve the problem that the running speed of the support arm in the existing outer diameter measuring device is fast and the measurement data is not accurate enough when the sensor signal transmission is not sensitive, the utility model proposes a support arm of the outer diameter measuring device, and the push plate fixed on the measuring rod is immersed in the anti-rust oil filled in the anti-rust oil cavity. When the support arm drives the push plate to move, the push plate is subjected to the resistance of the anti-rust oil to reduce the running speed of the support arm, which is more conducive to the signal response of the sensor and improves the measurement accuracy of the outer diameter measuring device.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A support arm of an outer diameter measuring device is provided on a housing of the measuring device, the support arm comprises a measuring rod and an extension rod, the measuring rod is located inside the housing, one end of the measuring rod extends out of the housing and is connected to the extension rod, an iron core shaft is installed on the side of the measuring rod away from the extension rod, a stator is installed on the side of the extension rod away from the measuring rod, the housing is hollow inside to form an anti-rust oil cavity, a connecting rod is fixed on the measuring rod, a push plate is fixed at the end of the connecting rod, and the push plate is located inside the anti-rust oil cavity. The anti-rust oil cavity is filled with anti-rust oil, and the anti-rust oil reduces the movement speed of the arm during the movement of the arm, and reduces the force applied by the arm to the external measuring device.

[0007] Furthermore, the measuring device is provided with a mounting seat body, on which a sensor, a spring, an adjustment pin, a spring and a support arm are installed, the mounting seat body includes a vertical portion and a horizontal portion, both ends of the vertical portion are fixed with corresponding horizontal portions, the vertical portion and the horizontal portion are connected to form a "U"-shaped longitudinal section, one end of the horizontal portion away from the vertical portion is fixed with a limit plate, the horizontal portion is provided with a first through hole for a connecting rod to pass through, one end of the connecting rod is fixed to the measuring rod, and the other end passes through the first through hole and is fixedly connected to the push plate. The mounting seat body with a "U"-shaped longitudinal section mainly plays a role in reducing weight, and can centrally install most of the components in the measuring device.

[0008] Furthermore, a mounting groove is provided at one end of the horizontal part away from the limiting plate, a spring is installed in the mounting groove, screw holes are provided at both ends of the vertical part close to the limiting plate, the screw holes penetrate the vertical part and are connected to the mounting groove, the screw holes are used to install the adjustment pins, and a guide groove is provided at one end of the horizontal part away from the limiting plate, so as to adjust the connection between the spring and the adjustment pin and adjust the elastic force of the spring.

[0009] Furthermore, both ends of the vertical portion away from the limiting plate are provided with a spring installation hole 1, and the spring installation hole 1 is symmetrically arranged with respect to the corresponding installation groove. The horizontal portion is provided with a spring installation hole 2, and a spring bent in an "L" shape is bolted between the spring installation hole 2 and the spring installation hole 1. The end of the horizontal portion away from the vertical portion is provided with a sensor installation hole, and the sensor is fixed in the sensor installation hole, and the iron core shaft extends into the sensor. The removable bolt method facilitates the disassembly and assembly of the reed; when the reed is connected with the corresponding reed installation hole 1 and reed installation hole 2, pads are provided on both sides of the reed to leave a distance between the reed and the mounting seat body to prevent the mounting seat body from causing position interference when the reed is deformed.

[0010] Furthermore, an extension portion is provided at the end of the measuring rod close to the vertical portion, the spring end is connected to the extension portion, and a connecting structure is provided on one side of the measuring rod close to the spring leaf, and the connecting structure is used to connect the support arm and the spring leaf.

[0011] Furthermore, the connecting structure includes a connecting part, a guide plate and a first screw rod. The connecting part is fixed on the measuring rod and is located on one side of the guide groove. The guide plate is located in the guide groove and a gap is provided between the guide groove. The first screw rod passes through the connecting part, the spring leaf and the guide plate in sequence to realize the connection between the support arm and the spring leaf.

[0012] Furthermore, the first screw rod is arranged obliquely so as to avoid position interference between the connecting portion and the mounting seat body when the measuring rod moves.

[0013] Furthermore, the measuring rod is provided with a conical second through hole, a second screw is provided in the second through hole, a thread groove is provided at the end of the connecting rod close to the measuring rod, the second screw passes through the measuring rod and extends into the thread groove to be connected and fixed with the connecting rod. The second screw is fully extended into the second through hole, leaving space for the movement of the support arm, and is threadedly connected and fixed with the end of the connecting rod.

[0014] Through the above technical scheme, the beneficial effect of the utility model is as follows: the push plate fixed on the measuring rod of the utility model is immersed in the anti-rust oil filled in the anti-rust oil cavity, and when the support arm drives the push plate to move, the push plate will be resisted by the anti-rust oil, thereby reducing the running speed of the support arm, thereby slowing down the movement of the iron core shaft inside the sensor, which is more conducive to the signal response of the sensor and improves the measurement accuracy of the measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a support arm of an outer diameter measuring device of the utility model;

[0016] Figure 2 It is a top view of a support arm of an outer diameter measuring device of the utility model;

[0017] Figure 3 The structure of the mounting base body of the outer diameter measuring device of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 4 The structure of the mounting base body of the outer diameter measuring device of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 5 It is a front view of a mounting seat body of an outer diameter measuring device of the utility model;

[0020] Figure 6 This is a partial structural cross-sectional view of an outer diameter measuring device of the utility model;

[0021] Figure 7 This is an enlarged structural diagram of the A portion of an outer diameter measuring device of the utility model;

[0022] Figure 8 The utility model is a structural schematic diagram of an outer diameter measuring device.

[0023] The numbers in the accompanying drawings are: 1 is a housing, 2 is a measuring rod, 3 is an extension rod, 4 is an iron core shaft, 5 is a measuring element, 6 is a connecting rod, 7 is a push plate, 11 is a sensor, 12 is a spring, 13 is an adjustment pin, 14 is a spring, 15 is a vertical portion, 16 is a horizontal portion, 17 is a limit plate, 18 is a first through hole, 19 is a mounting hole for a mounting seat, 21 is a mounting groove, 22 is a screw hole, 23 is a guide groove, 24 is a slot, 25 is an elastic section, 26 is a fixed section, 27 is a fastening bolt, 31 is a spring mounting hole one, 32 is a spring mounting hole two, 33 is a sensor mounting hole, 41 is an extension portion, 42 is a connecting portion, 43 is a guide plate, 44 is a first screw, 51 is a second through hole, 52 is a second screw, 53 is a pad, and 60 is an oil filling hole. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 8 As shown, this embodiment provides a support arm of an outer diameter measuring device, which is arranged on the housing 1 of the measuring device. The principle of the outer diameter measuring device is: when a workpiece to be measured is placed between the two measuring pieces 5, the workpiece to be measured props the two measuring pieces 5 outward to make them move away from each other, and the displacement action of the measuring pieces 5 is fed back to the measuring rod 2 through the extension rod 3, so that the rear ends of the two measuring rods 2 move inward, and at this time the spring 14 is stretched, and the measuring rod 2 causes the L-shaped spring leaf 12 to deform, and the iron core shaft 4 installed at the rear end of the measuring rod 2 is displaced inside the sensor 11, so that the sensor 1 generates an electrical signal, and the electrical signal is read by an external controller, and then the diameter of the workpiece to be measured is measured.

[0026] Specifically, the support arm includes a measuring rod 2 and an extension rod 3, the measuring rod 2 is located inside the shell 1, one end of the measuring rod 2 extends out of the shell 1 and is connected to the extension rod 3, an iron core shaft 4 is installed on the side of the measuring rod 2 away from the extension rod 3, and a measuring element 5 is installed on the side of the extension rod 3 away from the measuring rod 2. The shell 1 is hollow inside to form an anti-rust oil cavity, a connecting rod 6 is fixed on the measuring rod 2, and a push plate 7 is fixed at the end of the connecting rod 6, and the push plate 7 is located inside the anti-rust oil cavity. In this embodiment, an oil filling hole 60 is provided at the lower portion of the shell 1, and the inside of the anti-rust oil cavity is filled with anti-rust oil through the oil filling hole 60, and the anti-rust oil is silicone oil.

[0027] In this embodiment, the sensor 1 is composed of a coaxially arranged coil and an iron core shaft 4. The iron core shaft 4 can slide relative to the coil. This is a prior art and will not be discussed in detail.

[0028] The measuring device is provided with a mounting seat body, which includes a vertical portion 15 and a horizontal portion 16. The two ends of the vertical portion 15 are fixed with the horizontal portion 16. The vertical portion 15 and the horizontal portion 16 are connected to form a "U"-shaped longitudinal section. The end of the horizontal portion 16 away from the vertical portion 15 is fixed with a limit plate 17. The horizontal portion 16 is provided with a first through hole 18 for the connecting rod 6 to pass through. One end of the connecting rod 6 is fixed to the measuring rod 2, and the other end passes through the first through hole 18 and is fixedly connected to the push plate 7. In this embodiment, the two horizontal portions 16 are arranged in parallel with each other at an interval to reduce the weight of the mounting seat body.

[0029] The connection between the mounting seat body and the adjusting pin 13 and the spring 14 (such as Figure 3 to Figure 6 ):

[0030] The horizontal portion 16 is provided with a mounting groove 21 at one end away from the limiting plate 17, and a spring 14 is installed in the mounting groove 21. Screw holes 22 are provided at both ends of the vertical portion 15 close to the limiting plate 17. The holes 22 penetrate the vertical portion 15 and are connected to the mounting groove 21. The screw holes 22 are used to install the adjustment pin 13. The horizontal portion 16 is provided with a guide groove 23 at one end away from the horizontal portion 16.

[0031] Specifically, the mounting groove 21 is a U-shaped groove, which extends upward in height direction through the end surface of the horizontal portion 16 and extends outward in depth direction through a side surface of the vertical portion 15 . A spring 14 is disposed in each mounting groove 21 .

[0032] Specifically, the axial direction of the screw hole 22 is consistent with the depth direction of the installation groove 21 , and the sum of the depths of the screw hole 22 and the installation groove 21 is the width of the vertical portion 15 , that is, the screw hole 22 and the installation groove 21 are connected and combined to penetrate the vertical portion 15 .

[0033] The connection between the mounting base body and the sensor 11 and the reed 12 (such as Figure 3 to Figure 6 ):

[0034] The two ends of the vertical portion 15 on the side away from the limiting plate 17 are provided with a spring installation hole 1 31, and the spring installation hole 1 31 is symmetrically arranged with respect to the corresponding installation slot 21. The horizontal portion 16 is provided with a spring installation hole 2 32, and a spring 12 bent into an "L" shape is bolted between the spring installation hole 2 32 and the spring installation hole 1 31;

[0035] Specifically, two reed mounting holes 1 31 are arranged at both ends of the vertical portion 15, and two reed mounting holes 2 32 are arranged on each horizontal portion 16. The axial direction of the reed mounting hole 2 32 is perpendicular to the axial direction of the reed mounting hole 1 31, and the reed mounting hole 1 31 and the reed mounting hole 2 32 are both bolt holes.

[0036] Specifically, when the spring 12 is connected to the mounting seat body, pads 53 are provided on both sides of the spring 12 to leave a distance between the spring 12 and the mounting seat body to prevent the mounting seat body from causing position interference when the spring 12 is deformed.

[0037] A sensor mounting hole 33 is formed at the end of the horizontal portion 16 away from the vertical portion 15 . The sensor 11 is fixed in the sensor mounting hole 33 , and the core shaft 4 extends into the sensor 11 .

[0038] The connection between the mounting base body and the support arm (such as Figure 3 to Figure 7 ):

[0039] An extension portion 41 is provided at the end of the measuring rod 2 close to the vertical portion 15 , and the end of the spring 14 is connected to the extension portion 41 . A connecting structure is provided at one side of the measuring rod 2 close to the spring leaf 12 , and the connecting structure is used to connect the support arm and the spring leaf 12 .

[0040] Specifically, the extension portion 41 is fixedly connected to the measuring rod 2 by bolts and is perpendicular to the measuring rod 2. The end of the spring 14 extends out of the mounting groove 21, the pad 53, the spring leaf 12 and the pad 53 in sequence and is connected to the side wall of the extension portion 41, thereby realizing the connection and fixation between the extension portion 41 on the support arm and the mounting seat body.

[0041] The connection structure includes a connection part 42, a guide plate 43 and a first screw rod 44. The connection part 42 is fixed on the measuring rod 2 and is located on one side of the guide groove 23. The guide plate 43 is located in the guide groove 23 and is spaced apart from the guide groove 23. The first screw rod 44 passes through the connection part 42, the spring leaf 12 and the guide plate 43 in sequence to realize the connection between the support arm and the spring leaf 23.

[0042] Specifically, connecting parts 42 are provided on both sides of the measuring rod 2, and inclined first screw rods 44 are passed through the two connecting parts 42.

[0043] The measuring rod 2 is provided with a conical second through hole 51, in which a second screw rod 52 is provided. The connecting rod 6 is provided with a thread groove at the end close to the measuring rod 2, and the second screw rod 52 passes through the measuring rod and extends into the thread groove to be connected and fixed to the connecting rod 6.

[0044] In order to facilitate the installation of the sensor 11 and the probe 5, fixing mechanisms are respectively provided on the horizontal portion 16 and the extension rod 3, and the fixing mechanisms include a slot 24, an elastic section 25, a fixed section 26 and a fastening bolt 27. The difference is that the sensor 11 is installed by opening a slot 24 on one side of the second mounting portion 16, and the slot 24 separates the end of the second mounting portion 16 into an elastic section 25 and a fixed section 26, that is, the two sides of the slot 24 are the elastic section 25 and the fixed section 26; and the probe 5 is installed by opening a slot 24 on one side of the extension rod 3, and the slot 24 separates the end of the extension rod 3 into an elastic section 25 and a fixed section 26.

[0045] Furthermore, the fastening bolt 27 connects the elastic section 25 and the fixed section 26. After the sensor 11 is inserted into the sensor mounting hole 33, the fastening screw 27 is tightened to make the elastic section 25 continuously approach the fixed section 26, so that the sensor mounting hole 33 can be deformed, thereby clamping and fixing the sensor 11; and the installation of the probe 5 on the extension rod 3 is the same as the above method.

[0046] When the arm is used to measure the workpiece, the workpiece props up the two measuring rods 5 outwards and moves them away from each other. The displacement of the measuring rods 5 is fed back to the measuring rod 2 through the extension rod 3, so that the rear ends of the two measuring rods 2 move inwards. In this process, the extension part 41 on the measuring rod 2 drives the spring 14 to stretch, and then the connecting structure on the measuring rod 2 drives the spring leaf 12 on the side of the horizontal part 16 to deform, and the push plate 7 at the end of the connecting rod 6 moves in the silicone oil, which has the effect of slowing down the movement of the arm, so that the movement of the core shaft 4 inside the sensor 11 is slowed down, thereby improving the measurement accuracy of the measuring device.

[0047] Then, the displacement of the core shaft 4 installed at the rear end of the measuring rod 2 inside the sensor 11 causes the sensor 1 to generate an electrical signal, which is read by an external controller to measure the diameter of the workpiece.

[0048] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. An arm of an outer diameter measuring device, arranged on a housing (1) of the measuring device, characterized in that: The support arm comprises a measuring rod (2) and an extension rod (3); the measuring rod (2) is located inside the housing (1); one end of the measuring rod (2) extends out of the housing (1) and is connected to the extension rod (3); an iron core shaft (4) is installed on a side of the measuring rod (2) away from the extension rod (3); and a measuring element (5) is installed on a side of the extension rod (3) away from the measuring rod (2); The shell (1) is hollow inside to form an anti-rust oil cavity. A connecting rod (6) is fixed on the measuring rod (2). A push plate (7) is fixed at the end of the connecting rod (6). The push plate (7) is located inside the anti-rust oil cavity.

2. The support arm of the outer diameter measuring device according to claim 1, characterized in that: The measuring device is provided with a mounting seat body, on which a sensor (11), a reed (12), an adjustment pin (13), a spring (14) and a support arm are mounted; The mounting seat body comprises a vertical portion (15) and a horizontal portion (16), the two ends of the vertical portion (15) are fixed with corresponding horizontal portions (16), the vertical portion (15) and the horizontal portion (16) are connected to form a "U"-shaped longitudinal section, and a limiting plate (17) is fixed to one end of the horizontal portion (16) away from the vertical portion (15); The horizontal portion (16) is provided with a first through hole (18) for the connecting rod (6) to pass through; one end of the connecting rod (6) is fixed to the measuring rod (2), and the other end passes through the first through hole (18) to be fixedly connected to the push plate (7).

3. The support arm of the outer diameter measuring device according to claim 2, characterized in that: An end of the horizontal portion (16) away from the limiting plate (17) is provided with a mounting groove (21), and a spring (14) is installed in the mounting groove (21); Screw holes (22) are provided at both ends of the vertical portion (15) close to the limiting plate (17). The screw holes (22) penetrate the vertical portion (15) and are connected to the mounting groove (21). The screw holes (22) are used to mount the adjustment pins (13). A guide groove (23) is formed at one end of the horizontal portion (16) away from the limiting plate (17).

4. The support arm of the outer diameter measuring device according to claim 3, characterized in that: The two ends of the vertical portion (15) away from the limiting plate (17) are provided with a first reed mounting hole (31), the first reed mounting hole (31) being symmetrically arranged with respect to the corresponding mounting groove (21), the horizontal portion (16) is provided with a second reed mounting hole (32), a reed (12) bent into an "L" shape is bolted between the second reed mounting hole (32) and the first reed mounting hole (31); A sensor mounting hole (33) is provided at the end of the horizontal portion (16) away from the vertical portion (15), the sensor (11) is fixed in the sensor mounting hole (33), and the iron core shaft (4) extends into the sensor (11).

5. The support arm of the outer diameter measuring device according to claim 4, characterized in that: An extension portion (41) is fixed to the end of the measuring rod (2) close to the vertical portion (15); an end of the spring (14) passes through the spring leaf (12) and is connected to the extension portion (41); a connecting structure is provided on one side of the measuring rod (2) close to the spring leaf (12); the connecting structure is used to connect the support arm to the spring leaf (12).

6. The support arm of the outer diameter measuring device according to claim 5, characterized in that: The connection structure comprises a connection portion (42), a guide plate (43) and a first screw rod (44); the connection portion (42) is fixed on the measuring rod (2) and is located on one side of the guide groove (23); the guide plate (43) is located in the guide groove (23) and a gap is provided between the guide groove (23); and the first screw rod (44) passes through the connection portion (42), the spring leaf (12) and the guide plate (43) in sequence to achieve connection between the support arm and the spring leaf (12).

7. The support arm of the outer diameter measuring device according to claim 6, characterized in that: The first screw rod (44) is arranged tilted.

8. The support arm of an outer diameter measuring device according to any one of claims 1 to 7, characterized in that: The measuring rod (2) is provided with a conical second through hole (51), a second screw rod (52) is provided in the second through hole (51), a thread groove is provided at the end of the connecting rod (6) close to the measuring rod (2), and the second screw rod (52) passes through the measuring rod and extends into the thread groove to be connected and fixed to the connecting rod (6).

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