Measuring device and measuring method for toothed coupling top side play matching

Abstract

The present disclosure discloses a measuring device and a measuring method for tooth coupling top side clearance matching, the device comprising: a first positioning member having a tapered positioning surface matching the size of the axial hole of the drum-shaped tooth; a second positioning member having a rotating positioning pin, a circumferential positioning surface, a radial movement groove, and an inner tooth sleeve tooth groove positioning needle, the rotating positioning pin matches the first positioning member and the third positioning member in clearance, the size of the circumferential positioning surface matches the radial inner surface of the inner tooth sleeve to position it, and the inner tooth sleeve tooth groove positioning needle positions the inner tooth sleeve tooth groove along the extending direction of the radial movement groove; the third positioning member contains a radial movement step surface and can move relative to the second positioning member; a measuring member is fixed relative to the second positioning member, and the measuring part can align the first positioning member along the rotating direction of the first positioning member and the drum-shaped tooth relative to the second positioning member, and the measuring part can align the first positioning member along the radial movement direction of the first positioning member and the drum-shaped tooth relative to the second positioning member.

Description

Technical Field

[0001] This disclosure generally relates to the field of measuring device technology. More specifically, this disclosure relates to a measuring device and method for selecting the top backlash of a gear coupling. Background Technology

[0002] Gear couplings (also known as gear joints) are mechanical devices that transmit torque through the meshing of internal and external teeth. Their core purpose is to compensate for relative displacement between two shafts and reliably transmit power. They are widely used in industries with high requirements for transmission precision and reliability, such as metallurgy, shipbuilding and marine engineering, energy, heavy machinery, chemical and papermaking. Precise control of the backlash of the internal and external teeth in gear couplings is crucial, directly affecting the assembly and operational quality of the coupling. Currently, common methods for selecting the backlash of the internal and external teeth in gear couplings involve detecting the tooth thickness (common normal, ball pitch, etc.), addendum circle diameter, and dedendum circle diameter, and then performing complex calculations to obtain the backlash between the mating internal and external teeth. This method does not consider the backlash error caused by manufacturing precision errors of the internal and external teeth, which is detrimental to production organization and on-site quality control, and makes it difficult to accurately obtain the true mating backlash of the internal and external teeth.

[0003] In view of this, there is an urgent need to provide a measuring device and method for selecting the top backlash of gear couplings, so as to reduce the measurement error caused by the manufacturing precision error of the internal and external teeth and improve the accuracy of top backlash detection. Summary of the Invention

[0004] In order to at least address one or more of the technical problems mentioned above, this disclosure provides a measuring device and method for selecting the top backlash of gear couplings in several aspects.

[0005] In a first aspect, this disclosure provides a measuring device for selecting the top clearance of a gear coupling, the gear coupling including a matching drum-shaped tooth and an inner gear sleeve. The measuring device includes: a first positioning element having a tapered positioning surface, the size of which mates with the axial hole of the drum-shaped tooth to form a positioning; a second positioning element having a rotary positioning pin, a circumferential positioning surface, an inner gear sleeve tooth groove positioning pin, and a radial movement groove; a third positioning element having a radial movement step surface that slides radially with the radial movement groove; and a rotary positioning pin sequentially engaging with the third positioning element and the first positioning element with a clearance, such that the first positioning element and the second positioning element form a concentric and rotatable connection, the size of which mates with the axial hole of the inner gear sleeve. The inner surface is fitted to position it. The inner toothed sleeve tooth groove positioning pin is positioned and fitted with one tooth groove of the inner toothed sleeve on one side of the radial moving groove, so that it can be aligned with it along the extension direction of the radial moving groove. The rotating positioning pin can switch between a first locking position and a second locking position relative to the first positioning member. The measuring member, whose main body is fixed relative to the second positioning member, when the rotating positioning pin is in the first locking position, its measuring part can be aligned with the first positioning member along the rotation direction of the first positioning member and the drum-shaped tooth relative to the second positioning member to measure the side clearance of the gear coupling. When the rotating positioning pin is in the second locking position, the measuring part can be aligned with the first positioning member in the radial direction relative to the second positioning member to measure the top clearance of the gear coupling.

[0006] In some embodiments, the first positioning member further includes a measuring rod, the side of which is aligned with a scribe line on the second positioning member. The measuring rod extends radially outward along the tapered positioning surface. When measuring side clearance, the measuring portion of the measuring member abuts against the side of the measuring rod, and when measuring top clearance, the measuring portion of the measuring member abuts against the outer end face of the measuring rod.

[0007] In some embodiments, the measuring rod is provided with a detection point, which is aligned with the measuring part of the measuring element, and the position of the detection point is aligned with the meshing circle of the drum-shaped tooth and the inner tooth sleeve.

[0008] In some embodiments, the first positioning member further includes a locking member and a tapered positioning member. The locking member has a threaded connection portion and a measuring positioning portion. The tapered positioning member has a tapered positioning surface. The threaded connection portion is threadedly connected to the tapered positioning member. The measuring rod has a measuring positioning hole. The measuring positioning portion cooperates with the measuring positioning hole. The locking member presses the measuring rod against the tapered positioning member.

[0009] In some embodiments, the locking element further includes a locking handle disposed at the other end of the threaded connection.

[0010] In some embodiments, the locking member is hollow inside, and the rotary positioning pin further includes a rotary limiting rod disposed perpendicularly to its main axis. The rotary positioning pin can slide therein. A first slot and a second slot are provided at the end of the locking handle away from the second positioning member. When the rotary limiting rod is in the first slot, it is in a side clearance detection state, and when the rotary limiting rod is in the second slot, it is in a top clearance detection state.

[0011] In some embodiments, the second positioning element further includes a base and a positioning seat, wherein the engraving lines on the base are aligned with the radial movement groove, and the base and the positioning seat are fixedly connected by positioning bolts.

[0012] In some embodiments, the second positioning element further includes a measuring fastener, which includes a clamp movably disposed relative to the base and capable of pressing the inner toothed sleeve relative to the base.

[0013] In some embodiments, a pressing device is also included, which presses against the first positioning member toward the second positioning member.

[0014] In some embodiments, the pressing device includes a hydraulic cylinder, the cylinder body of which is fixedly connected to the second positioning member, and the cylinder rod is capable of pressing the first positioning member against the second positioning member.

[0015] In a second aspect, this disclosure provides a method for measuring the backlash of a gear coupling, which uses a measuring device according to the first aspect and several embodiments. The measuring method includes the following steps: S01: fixing a second positioning member and positioning the main body of a measuring member relative to the second positioning member; S02: fitting an inner gear sleeve onto the circumferential positioning surface of the second positioning member; inserting a first positioning member into the axial hole of a drum-shaped tooth until the conical positioning surface presses against the axial hole, so that the drum-shaped tooth and the first positioning member are relatively fixed; engaging the rotary positioning pins of the first positioning member and the second positioning member with clearance, so that the first positioning member and the drum-shaped tooth can rotate concentrically relative to the second positioning member and the inner gear sleeve, and aligning the measuring part of the measuring member with the first positioning member, with the limiting rod of the rotary positioning pin in the first slot; S03: rotating the first positioning member and the drum-shaped tooth clockwise and counterclockwise respectively, recording the maximum and minimum values ​​displayed by the measuring member, and calculating the difference between the maximum and minimum values, which is the backlash value between the drum-shaped tooth and the inner gear sleeve.

[0016] In a third aspect, this disclosure provides a method for measuring the clearance of a gear coupling, which uses a measuring device according to the first aspect and several embodiments. The measuring method includes the following steps: S01: fixing a second positioning member and positioning the main body of the measuring member relative to the second positioning member; S02: fitting an inner gear sleeve onto the circumferential positioning surface of the second positioning member; inserting a first positioning member into the axial hole of the drum-shaped tooth until the conical positioning surface presses against the axial hole, so that the drum-shaped tooth and the first positioning member are relatively fixed; engaging the rotary positioning pins of the first positioning member and the second positioning member with clearance, so that the first positioning member and the drum-shaped tooth can rotate concentrically relative to the second positioning member and the inner gear sleeve, and aligning the measuring part of the measuring member with the first positioning member, with the limiting rod of the rotary positioning pin in the second slot; S03: moving the first positioning member and the drum-shaped tooth back and forth along the radial moving groove, recording the maximum and minimum values ​​displayed by the measuring member, and calculating the difference between the maximum and minimum values, which is the clearance value between the drum-shaped tooth and the inner gear sleeve.

[0017] Using the measuring device and method for selecting the top backlash of a gear coupling as provided above, the embodiments disclosed herein utilize the conical positioning surface of the first positioning member to engage with the axial hole of the drum-shaped tooth, and the circumferential positioning surface of the second positioning member to engage with the radial inner surface of the inner tooth sleeve. The two positioning members are connected concentrically and rotatably via a clearance fit with a rotating positioning pin. The measuring member is aligned with the first positioning member, and the displacement can be directly obtained in the rotating state, thereby reducing the measurement error caused by the misalignment of the inner and outer teeth and improving the accuracy of backlash detection. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1a An exemplary front view of a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure, is shown, with the rotary locating pin in a first locked position; Figure 1b An exemplary front view of a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure, is shown, with the rotary locating pin in a second locked position; Figure 2a An exemplary cross-sectional view of a portion of a second positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 2b It shows Figure 2a A magnified view of a portion of the central K-axis; Figure 3An exemplary cross-sectional view is shown of the connection portion between the first positioning member and the second positioning member of a measuring device for top backlash selection of a gear coupling according to some embodiments of this disclosure; Figure 4 An exemplary front view of a portion of the components of a first positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 5 An exemplary top view of a portion of the first locating element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 6 An exemplary cross-sectional view of a positioning seat for a measuring device for selecting the top clearance of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 7 An exemplary top view of a positioning seat for a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 8 An exemplary side view of the third positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 9 An exemplary front view of a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure, is shown. Detailed Implementation

[0020] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0021] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0023] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0024] This disclosed embodiment provides a measuring device for selecting the top backlash of a gear coupling. The device uses a first positioning element with a tapered positioning surface that engages with the axial hole of the drum-shaped tooth, and a second positioning element with a circumferential positioning surface that engages with the radial inner surface of the inner tooth sleeve. The two positioning elements are connected concentrically and rotatably via a rotary positioning pin with clearance engagement. The measuring element is aligned with the first positioning element, and the displacement can be directly obtained in the rotating state, thereby reducing the measurement error caused by the misalignment of the inner and outer teeth and improving the accuracy of backlash detection.

[0025] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0026] See Figures 1a to 8 , Figure 1a An exemplary front view of a measuring device for top clearance selection of a gear coupling according to some embodiments of this disclosure is shown, wherein the gear coupling is shown in its set position, and a cross-section of a portion of the components is shown to illustrate the internal structure, with the rotary locating pin in a first locked position. Figure 1b An exemplary front view of a measuring device for top clearance selection of a gear coupling according to some embodiments of this disclosure is shown, wherein the gear coupling is shown in its set position, and a cross-section of a portion of the components is shown to illustrate the internal structure, with the rotary locating pin in a second locking position. Figure 2a An exemplary cross-sectional view of a portion of the second positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 2b It shows Figure 2a A magnified view of a portion of the central K-axis. Figure 3 An exemplary cross-sectional view is shown of the connection portion between the first and second positioning members of a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure. Figure 4 An exemplary front view of a portion of the components of a first positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 5 An exemplary top view of a portion of the first locating element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 6 An exemplary cross-sectional view is shown of a positioning seat for a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure. Figure 7 An exemplary top view of a positioning seat for a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 8 An exemplary side view of the third positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown.

[0027] This disclosure provides a measuring device for selecting the top backlash of a gear coupling, wherein the gear coupling includes a matching drum-shaped tooth 41 and an inner gear sleeve 42. The measuring device includes a first positioning element 2, a second positioning element 1, a third positioning element 24, and a measuring element 32. The first positioning element 2 has a tapered positioning surface 221, the size of which mates with the axial hole of the drum-shaped tooth 41 to form a positioning. The second positioning element 1 has a rotary positioning pin 23, a circumferential positioning surface 211, an inner gear sleeve tooth groove positioning pin 215, and a radial moving groove 216. The third positioning element 24 has a radially moving step surface 241 that slides radially with the radial moving groove 216. The rotary positioning pin 23 sequentially engages with the third positioning element 24 and the first positioning element 2 with a clearance, such that the first positioning element 2 and the second positioning element 1 form a concentric and rotatable connection, and the rotary positioning pin 23 can switch between a first locked position and a second locked position relative to the first positioning element 2. The circumferential positioning surface 211 is sized to mate with the radial inner surface of the inner gear sleeve 42 for positioning. The inner gear sleeve tooth groove positioning pin 215 includes a guide portion 2151 and a positioning portion 2152. The positioning portion 2152 is positioned and engaged with one tooth groove of the inner gear sleeve 42 on one side of the radial moving groove 216, allowing it to align with the radial moving groove 216 along its extension direction. The main body of the measuring member 32 is fixed relative to the second positioning member 1. When the rotating positioning pin 23 is in the first locking position, its measuring portion is aligned with the first positioning member 2 along the rotation direction of the first positioning member 2 and the drum-shaped tooth 41 relative to the second positioning member 1 to measure the side clearance of the gear coupling. When the rotating positioning pin 23 is in the second locking position, the measuring portion is aligned with the first positioning member 2 in the radial direction relative to the second positioning member 1 to measure the top clearance of the gear coupling.

[0028] Specifically, the dimensions and shapes of the first positioning member 2 and the second positioning member 1 can be specially designed and manufactured according to the gear tooth parameters of the inner and outer teeth of the coupling under inspection, the relevant dimensions of the inner gear sleeve 42 and the drum-shaped tooth 41, so that they can form a good fit with the drum-shaped tooth 41 and the inner gear sleeve 42 of the coupling under inspection. The first positioning member 2 may include a tapered positioning member 22, which is a columnar structure with a tapered positioning surface 221 on its outer side. The tapered positioning surface 221 mates with the axial hole of the drum-shaped tooth 41. One end of the tapered positioning surface 221 is slightly smaller than the inner diameter of the axial hole of the drum-shaped tooth 41 so that it can penetrate deep into it, while the other end is set to be slightly larger than the inner diameter of the axial hole of the drum-shaped tooth 41 so that the drum-shaped tooth 41 is pressed against it after insertion, and is centered and fixed on the first positioning member 2. The second positioning member 1 may include a positioning seat 21, the outer peripheral surface of which is a circumferential positioning surface 211. A radially extending radial moving groove 216 is formed on the positioning seat 21. The inner toothed sleeve tooth groove positioning pin 215 is fixedly set on one side of the radial moving groove 216 and is used to embed into one tooth groove of the inner toothed sleeve 42 during measurement to achieve circumferential positioning. The third positioning member 24 slides with the radial moving step surface 241 of its radial moving surface 241, so that the third positioning member 24 can move radially. The rotating positioning pin 23 passes through the third positioning member 24 and the first positioning member 2 in sequence and is clearance-fitted with both, so that the first positioning member 2 can rotate concentrically or move radially relative to the second positioning member 1. The circumferential positioning surface 211 forms a dimensional fit with the radial inner surface of the inner toothed sleeve 42, so that the inner toothed sleeve 42 and the second positioning member 1 are concentrically positioned. The rotating positioning pin 23 is clearance-fitted with the first positioning member 2, so that the first positioning member 2 can drive the drum-shaped tooth 41 to rotate concentrically relative to the second positioning member 1 and the inner toothed sleeve 42, thereby simulating the meshing state. The measuring element 32 can be a dial indicator or micrometer for measuring runout, or a distance detection device with similar functions. The main body of the measuring element 32 is fixed relative to the second positioning element 1, while its measuring part is aligned with and abuts against one side of the first positioning element 2. Thus, when the first positioning element 2, together with the drum-shaped tooth 41, rotates relative to the second positioning element 1, together with the inner toothed sleeve 42, the displacement change at the abutting position of the measuring part can be read. This displacement change reflects the side clearance between the drum-shaped tooth 41 and the inner toothed sleeve 42. When it is necessary to measure the top clearance, the rotating positioning pin 23 is switched to the second locking position, and the first positioning element 2 and the drum-shaped tooth 41 can move along the radial moving groove 216. The measuring part abuts against the radial end face of the first positioning element 2, and the displacement change is read to obtain the top clearance. This device, through its concentric rotatable structural design, eliminates measurement errors caused by misalignment, ensuring the accuracy of side clearance and top clearance detection.

[0029] See Figure 1a , Figure 4 and Figure 5 , Figure 4An exemplary front view of a portion of the components of a first positioning element of a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. Figure 5 An exemplary top view of a portion of the components of a first positioning member for a measuring device for top backlash selection of a gear coupling, according to some embodiments of this disclosure, is shown. In this embodiment, the first positioning member 2 further includes a measuring rod 33 extending radially outward along a tapered positioning surface 221. When measuring backlash, the measuring portion of the measuring member 32 abuts against the side of the measuring rod 33; when measuring top backlash, the measuring portion of the measuring member 32 abuts against the outer end face of the measuring rod 33. The side of the measuring rod 33 is aligned with a scribe line 101 on the second positioning member 1 to indicate the measurement position. The measuring portion of the measuring member 32 abuts against the side of the measuring rod 33. The radially outwardly extending portion of the measuring rod 33 provides an abutment point for the measuring portion of the measuring member 32. When the first positioning member 2 rotates, the oscillation of the measuring rod 33 can directly act on its contact position with the measuring portion to simulate the size of the backlash. However, those skilled in the art will understand that this laterally extended measuring rod 33 is merely an example, and this disclosure is not limiting in this respect. For example, in some embodiments not shown, the measuring element 32 may be a ranging sensor with an infrared measuring component, whose probe, as the measuring part, is aligned with a positioning protrusion or positioning groove on the side of the first positioning element 2. Alternatively, the measuring element 32 may be other types of ranging devices, as long as it can detect and obtain the rotation angle or rotation distance of the first positioning element 2 relative to the second positioning element 1.

[0030] In this embodiment, by configuring the measuring rod 33 to protrude radially relative to the first positioning member 2, the measuring member 32 can be arranged radially outside the first positioning member 2, preventing spatial interference between the main body of the measuring member 32 and the first positioning member 2 and the second positioning member 1. The measuring part abuts against the side or outer end face of the measuring rod 33, and the measuring rod 33 rotates synchronously when the drum-shaped tooth 41 rotates circumferentially, facilitating accurate readings by the measuring member 32. This structure simplifies the measurement method and improves the convenience and repeatability of the detection.

[0031] Further, or optionally, the measuring rod 33 is provided with a detection point 313, which is aligned with the measuring part of the measuring element 32, and the position of the detection point 313 is aligned with the meshing circle of the drum-shaped tooth 41 and the inner tooth sleeve 42. This ensures that the displacement measured by the measuring part is exactly equal to the actual backlash on the meshing circle, avoiding conversion errors caused by indirect measurement. This allows the operator to directly obtain the true backlash value without complex position adjustments for each measurement, significantly improving measurement efficiency and data reliability.

[0032] However, those skilled in the art will understand that in some other embodiments not shown, the position of the detection point 313 can also be set at other positions on the measuring rod 33. For example, the detection point 313 can be set further outward relative to the radial direction of the drum-shaped teeth 41 on the measuring rod 33, so that its rotation distance when the first positioning member 2 rotates relative to the second positioning member 1 is greater than the actual backlash. By setting the radius of the detection point 313 relative to the center of rotation to a fixed multiple of the radius of the meshing circle of the drum-shaped teeth 41, the actual backlash value can be easily obtained through conversion. The advantage of this setting is that by extending the radius of the detection point 313 of the measuring rod 33 relative to the center of rotation, the displacement of the measuring point during measurement can be increased, thereby improving the detection sensitivity when the backlash is small and reducing the detection error.

[0033] In addition, see Figure 1a , Figure 3 , Figure 4 and Figure 6 , Figure 6 An exemplary cross-sectional view of a positioning seat for a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure, is shown. In this embodiment, the first positioning member 2 further includes a locking member 34, which has a threaded connection portion 341 and a measuring positioning portion 342. The tapered positioning member 22 is provided with a tapered positioning surface 221. The threaded connection portion 341 is threadedly connected to the tapered positioning member 22. The measuring rod 33 is provided with a measuring positioning hole 312. The measuring positioning portion 342 engages with the measuring positioning hole 312, and the locking member 34 presses the measuring rod 33 against the tapered positioning member 22. The threaded connection portion 341 and the measuring positioning portion 342 of the locking member 34 are inserted into the measuring positioning hole 312 on the measuring rod 33. The measuring positioning portion 342 engages with the measuring positioning hole 312 on the measuring rod 33. The threaded connection portion 341 is then connected to the positioning threaded hole of the tapered positioning member 22. By tightening the threads, the measuring rod 33 is firmly pressed against the tapered positioning member 22. Therefore, the first positioning component 2 is divided into several simple sub-components, which are assembled and thus have lower processing costs. Furthermore, since the measuring rod 33 and the conical positioning component 22 form a detachable fixed connection, a suitable measuring rod 33 can be replaced according to different specifications of the drum-shaped teeth 41 or measurement requirements. For example, as mentioned above, by replacing it with a longer measuring rod 33, the distance between the detection point 313 and the rotation center can be increased, thereby improving detection accuracy. This enhances the versatility of the device and allows it to flexibly handle measurement scenarios with different specifications and requirements.

[0034] In this embodiment, the locking member 34 further includes a locking handle 344, which is disposed at the other end of the threaded connection portion 341. The locking member 34 is hollow inside, and the rotary positioning pin 23 also includes a rotary limiting rod 233 disposed perpendicularly to its main axis, a connecting rod 232 extending along the main axis, and a positioning section 231 disposed at the other end of the connecting rod 232. The connecting rod 232 and the positioning section 231 of the rotary positioning pin 23 can slide inside the hollow interior of the locking member 34, and the positioning section 231 can form a clearance fit with the hollow interior of the locking member 34 to reduce shaking. At the end of the locking handle 344 opposite to the second positioning member 1, there are a first slot 3441 and a second slot 3442 that are perpendicular to each other and located at different axial positions. When the rotating limiting rod 233 is in the first slot 3441, the rotating positioning pin 23 is in the first locking position. Its positioning section 231 passes through the positioning hole on the third positioning member 24 and is inserted into the second positioning hole 212 on the positioning seat 21 to lock the third positioning member 24 relative to the positioning seat 21. The device is in the side clearance detection state. When the rotating limiting rod 233 is in the second slot 3442, the rotating positioning pin 23 is in the second locking position. It is pulled out relative to the positioning hole of the positioning seat 21 to release the third positioning member 24 relative to the positioning seat 21. This allows it to move radially by means of the sliding fit between its radial moving step surface 241 and the radial moving groove 216. The device is in the top clearance detection state. The top clearance can be measured by the radial movement between the drum-shaped tooth 41 and the inner tooth sleeve 42. The locking handle 344 can be equipped with surface finishes such as knurling or anti-slip grooves to increase friction, or it can be equipped with a lateral rotating arm perpendicular to the rotation axis of the first positioning member 2 for easy tightening by the operator. These features provide the operator with a convenient grip and force application mechanism, allowing for manual tightening or loosening of the locking member 34 without the need for additional tools. This simplifies the installation and disassembly of the measuring rod 33 and improves the convenience of on-site testing.

[0035] See Figure 1a , Figure 2a , Figure 6 and Figure 7 , Figure 7An exemplary top view of a positioning seat for a measuring device for selecting the top clearance of a gear coupling, according to some embodiments of this disclosure, is shown. The second positioning member 1 also includes a base 11 and a positioning seat 21, which are fixedly connected by positioning bolts 13. Both the base 11 and the positioning seat 21 can be generally plate-shaped, with the positioning seat 21 fixed to the base 11 by positioning bolts 13 or other fasteners. The positioning seat 21 has a radially extending radial movement groove 216, and the base 11 has a graduated line 101 aligned with the center portion of the radial movement groove 216 for indicating position during measurement. A third positioning member 24 slides within the radial movement groove 216. Thus, the base 11 and the positioning seat 21 are formed as a separate structure, facilitating processing and assembly and reducing production costs. The positioning seat 21 has a connecting hole 214 and a circumferential positioning surface 211 formed by precision machining to meet the coaxiality requirements between the rotating positioning pins 23 of the second positioning member 1. Similar to the first positioning component 2, the second positioning component 1 adopts a split structure, which also has the advantage of allowing the corresponding sub-components to be replaced according to actual usage needs without having to be completely replaced, thus making it more versatile.

[0036] In addition, the second positioning element 1 also includes a measuring fastener, which includes a clamping piece 12 movably disposed relative to the base 11. The clamping piece 12 can press the inner toothed sleeve 42 against the base 11. Multiple measuring fasteners can be provided, positioned at multiple locations around the inner toothed sleeve 42 to ensure a more uniform distribution of clamping force. The clamping piece 12 is movably disposed on the base 11 via a clamping piece 12 bolt or similar structure, and moves relative to the base 11 under the drive of the clamping piece 12 bolt to press the outer flange portion of the inner toothed sleeve 42 or other structures that can be used for positioning, thereby firmly locking the inner toothed sleeve 42 onto the second positioning element 1. The clamping piece 12 has a relatively simple structure and is highly versatile, adaptable to inner toothed sleeves 42 of different sizes. Furthermore, the clamping force can be adjusted by using the clamping piece 12 bolt. On the one hand, the clamping piece 12 can prevent the inner toothed sleeve 42 from shifting or deviating when rotating the drum-shaped tooth 41, improving the accuracy of the measurement results. On the other hand, it can reduce the probability of deformation of the inner gear sleeve 42 caused by the rigid fixing of the inner gear sleeve 42 by bolts and other hard fixing structures, reduce damage to the test parts, and improve the repeatability of the test.

[0037] Further or alternatively, see Figure 9 , Figure 9An exemplary front view of a measuring device for selecting the top backlash of a gear coupling, according to some embodiments of this disclosure, is shown. The measuring device for selecting the top backlash of a gear coupling also includes a pressing device 9, which presses against a first positioning member 2 toward a second positioning member 1. The pressing device 9 applies an additional axial force toward the second positioning member 1 to the first positioning member 2, ensuring that the tapered positioning surface 221 of the first positioning member 2 maintains tight contact with the axial hole of the drum-shaped tooth 41, reducing the probability of the drum-shaped tooth 41 loosening or wobbling during rotation. This allows for more stable meshing between the drum-shaped tooth 41 and the inner gear sleeve 42, avoiding errors caused by loosening. The pressing device 9 may include a hydraulic cylinder 91, whose cylinder body is fixedly connected to the second positioning member 1, and whose cylinder rod can press against the first positioning member 2 toward the second positioning member 1. Using a hydraulic cylinder 91 as the pressing device provides a uniform, continuous, and adjustable pressing force, better adapting to the measurement needs of drum-shaped teeth 41 of different specifications and weights. The cylinder body can be fixedly connected to the second positioning component 1 through structural components such as fixed brackets, so that its pressure direction is parallel to the rotation axis. The cylinder rod directly presses against the axial end face of the first positioning component 2 on the side away from the second positioning component 1. The pressure is stably controlled by the hydraulic system to improve the reliability of the measurement.

[0038] According to some embodiments of this disclosure, a measuring device for selecting the top backlash of a gear coupling uses a first positioning member with a tapered positioning surface that engages with the axial hole of the drum-shaped tooth, and a second positioning member with a circumferential positioning surface that engages with the radial inner surface of the inner tooth sleeve. The two positioning members are connected concentrically and rotatably via a rotary positioning pin with clearance engagement. Radial guidance is achieved through a third positioning member engaging with a radial moving groove. The measuring member is aligned with the first positioning member, enabling direct acquisition of the backlash displacement in the rotating state and direct acquisition of the top backlash displacement in the radial moving state. This reduces measurement errors caused by misalignment of the inner and outer teeth and improves the accuracy of backlash and top backlash detection.

[0039] Furthermore, this disclosure also provides a measurement method for selecting the backlash of a gear coupling, which is performed using the measuring device described in the above embodiments. The measurement method includes the following steps: Step S01, fixing the second positioning member 1 and positioning the main body of the measuring member 32 relative to the second positioning member 1. Step S02, fitting the inner gear sleeve 42 onto the circumferential positioning surface 211 of the second positioning member 1; inserting the first positioning member 2 into the axial hole of the drum-shaped tooth 41 until the conical positioning surface 221 presses against the axial hole, thus fixing the drum-shaped tooth 41 relative to the first positioning member 2; and engaging the first positioning member 2 with the rotary positioning pin 23 of the second positioning member 1 with a clearance fit, allowing the first positioning member 2 and the drum-shaped tooth 41 to rotate concentrically relative to the second positioning member 1 and the inner gear sleeve 42, and aligning the measuring part of the measuring member 32 with the first positioning member 2, with the limiting rod 233 of the rotary positioning pin 23 positioned in the first slot 3441. In step S03, the first positioning component 2 and the drum-shaped tooth 41 are rotated clockwise and counterclockwise respectively. The maximum and minimum values ​​displayed by the measuring component 32 are recorded, and the difference between the maximum and minimum values ​​is calculated. This difference is the backlash value between the drum-shaped tooth 41 and the inner gear sleeve 42. By fixing the second positioning component 1 and the main body of the measuring component 32, the drum-shaped tooth 41, the inner gear sleeve 42, and the first positioning component 2 are installed in sequence. Finally, the first positioning component 2 is rotated bidirectionally to measure the maximum and minimum displacement difference, directly obtaining the backlash value. This method is simple to operate. The bidirectional rotation can eliminate the measurement deviation caused by the single-sided contact of the tooth surface during unidirectional rotation. The measured backlash value is close to the theoretical actual value, without the need for complex conversion. Therefore, this method can quickly and accurately complete the selection and testing of the backlash of the internal and external teeth of the gear coupling, significantly improving assembly quality and efficiency.

[0040] Furthermore, this disclosure also provides a measurement method for selecting the top clearance of a gear coupling, which uses the aforementioned measuring device and includes the following steps: S01: fixing the second positioning member 1 and positioning the main body of the measuring member 32 relative to the second positioning member 1; S02: fitting the inner gear sleeve 42 onto the circumferential positioning surface 211 of the second positioning member 1; inserting the first positioning member 2 into the axial hole of the drum-shaped tooth 41 until the conical positioning surface 221 presses against the axial hole, so that the drum-shaped tooth 41 and the first positioning member 2 are relatively fixed; and fixing the first positioning member 2 and the second positioning member 32... The rotary positioning pin 23 of the first positioning member 2 and the drum-shaped tooth 41 are in clearance fit, allowing the first positioning member 2 and the drum-shaped tooth 41 to rotate concentrically relative to the second positioning member 1 and the inner gear sleeve 42, and aligning the measuring part of the measuring member 32 with the first positioning member 2. The limiting rod 233 of the rotary positioning pin 23 is located in the second slot 3442. S03: The first positioning member 2 and the drum-shaped tooth 41 are moved back and forth along the radial moving groove 216, and the maximum and minimum values ​​displayed by the measuring member 32 are recorded. The difference between the maximum and minimum values ​​is calculated, and this difference is the top clearance value between the drum-shaped tooth 41 and the inner gear sleeve 42. Through this method, the selection and testing of the top clearance of the gear coupling can be completed quickly and accurately. Combined with the side clearance measurement method, a comprehensive evaluation of the coupling selection can be achieved.

[0041] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A measuring device for selecting the top side clearance of a gear coupling, the gear coupling comprising matching drum-shaped teeth (41) and an inner gear sleeve (42), characterized in that, The measuring device includes: The first positioning element (2) has a tapered positioning surface (221), the size of which is matched with the axial hole of the drum-shaped tooth (41) to form a positioning thereon; The second positioning component (1) has a rotating positioning pin (23), a circumferential positioning surface (211), an internal toothed sleeve tooth groove positioning pin (215), and a radial moving groove (216). The third positioning element (24) has a radially movable step surface (241) that slides radially with the radially movable groove (216); and The rotary positioning pin (23) is sequentially fitted with the third positioning member (24) and the first positioning member (2) with clearance, so that the first positioning member (2) and the second positioning member (1) form a concentric and rotatable connection. The size of the circumferential positioning surface (211) is fitted with the radial inner surface of the inner toothed sleeve (42) for positioning. The toothed groove positioning pin (215) of the inner toothed sleeve is fitted with one toothed groove of the inner toothed sleeve (42) on one side of the radial moving groove (216) so that it can be aligned with the radial moving groove (216) along its extension direction. The rotary positioning pin (23) can be positioned relative to the first positioning member. (2) Switching between the first locking position and the second locking position; the measuring part (32), whose main body is fixed relative to the second positioning part (1), when the rotating positioning pin (23) is in the first locking position, its measuring part can be aligned with the first positioning part (2) along the rotation direction of the first positioning part (2) and the drum-shaped tooth (41) relative to the second positioning part (1) to measure the side clearance of the gear coupling, and when the rotating positioning pin (23) is in the second locking position, the measuring part can be aligned with the first positioning part (2) in the radial direction relative to the second positioning part (1) to measure the top clearance of the gear coupling.

2. The measuring device according to claim 1, characterized in that, The first positioning member (2) also includes a measuring rod (33), the side of which is aligned with the engraving line (101) on the second positioning member (1). The measuring rod (33) extends radially outward along the conical positioning surface (221). When measuring the side gap, the measuring part of the measuring member (32) abuts against the side of the measuring rod (33). When measuring the top gap, the measuring part of the measuring member (32) abuts against the outer end face of the measuring rod (33).

3. The measuring device according to claim 2, characterized in that, The measuring rod (33) is provided with a detection point (313), which is aligned with the measuring part of the measuring component (32), and the position of the detection point (313) is aligned with the meshing circle of the drum-shaped tooth (41) and the inner tooth sleeve (42).

4. The measuring device according to claim 2, characterized in that, The first positioning member (2) further includes a locking member (34) and a conical positioning member (22). The locking member (34) has a threaded connection part (341) and a measuring positioning part (342). The conical positioning member (22) is provided with a conical positioning surface (221). The threaded connection part (341) is threadedly connected to the conical positioning member (22). The measuring rod (33) is provided with a measuring positioning hole (312). The measuring positioning part (342) cooperates with the measuring positioning hole (312), and the locking member (34) presses the measuring rod (33) against the conical positioning member (22).

5. The measuring device according to claim 4, characterized in that, The locking member (34) also includes a locking handle (344), which is located at the other end of the threaded connection (341).

6. The measuring device according to claim 5, characterized in that, The locking member (34) is hollow inside. The rotating positioning pin (23) also includes a rotating limiting rod (233) that is perpendicular to its main axis. The rotating positioning pin (23) can slide therein. A first slot (3441) and a second slot (3442) are provided at the end of the locking handle (344) away from the second positioning member (1). When the rotating limiting rod (233) is in the first slot (3441), it is in the side clearance detection state. When the rotating limiting rod (233) is in the second slot (3442), it is in the top clearance detection state.

7. The measuring device according to claim 1, characterized in that, The second positioning component (1) also includes a base (11) and a positioning seat (21). The engraving line (101) on the base (11) is aligned with the radial moving groove (216). The base (11) and the positioning seat (21) are fixedly connected by positioning bolts (13).

8. The measuring device according to claim 7, characterized in that, The second positioning member (1) further includes a measuring fastener, which includes a clamp (12) movably disposed relative to the base (11) and capable of pressing the inner toothed sleeve (42) relative to the base (11).

9. The measuring device according to claim 1, characterized in that, It also includes a pressing device (9) that presses against the first positioning member (2) toward the second positioning member (1).

10. The measuring device according to claim 9, characterized in that, The pressing device (9) includes a hydraulic cylinder (91), whose cylinder body is fixedly connected to the second positioning member (1), and the cylinder rod can press against the first positioning member (2) towards the second positioning member (1).

11. A method for measuring the backlash of gear couplings, characterized in that, It uses the measuring device according to any one of claims 1 to 10, and the measuring method includes the following steps: S01: Fix the second positioning member (1) in place, and position and install the main body of the measuring member (32) relative to the second positioning member (1); S02: Fit the inner toothed sleeve (42) onto the circumferential positioning surface (211) of the second positioning member (1); insert the first positioning member (2) into the axial hole of the drum-shaped tooth (41) until the conical positioning surface (221) presses against the axial hole, so that the drum-shaped tooth (41) and the first positioning member (2) are relatively fixed; make the first positioning member (2) and the rotating positioning pin (23) of the second positioning member (1) clearance fit, so that the first positioning member (2) and the drum-shaped tooth (41) can rotate concentrically relative to the second positioning member (1) and the inner toothed sleeve (42), and make the measuring part of the measuring member (32) aligned with the first positioning member (2), and the limiting rod (233) of the rotating positioning pin (23) is in the first slot (3441). S03: Rotate the first positioning member (2) and the drum-shaped tooth (41) in the clockwise and counterclockwise directions respectively, record the maximum and minimum values ​​displayed by the measuring member (32), calculate the difference between the maximum and minimum values, and the difference is the side clearance value between the drum-shaped tooth (41) and the inner tooth sleeve (42).

12. A method for measuring the clearance of gear couplings, characterized in that, It uses the measuring device according to any one of claims 1 to 10, and the measuring method includes the following steps: S01: Fix the second positioning member (1) in place, and position and install the main body of the measuring member (32) relative to the second positioning member (1); S02: Fit the inner toothed sleeve (42) onto the circumferential positioning surface (211) of the second positioning member (1); insert the first positioning member (2) into the axial hole of the drum-shaped tooth (41) until the conical positioning surface (221) presses against the axial hole, so that the drum-shaped tooth (41) and the first positioning member (2) are relatively fixed; make the first positioning member (2) and the rotating positioning pin (23) of the second positioning member (1) clearance fit, so that the first positioning member (2) and the drum-shaped tooth (41) can rotate concentrically relative to the second positioning member (1) and the inner toothed sleeve (42), and make the measuring part of the measuring member (32) aligned with the first positioning member (2), and the limiting rod (233) of the rotating positioning pin (23) is in the second slot (3442). S03: Move the first positioning member (2) and the drum-shaped tooth (41) back and forth along the radial moving groove (216), record the maximum and minimum values ​​displayed by the measuring member (32), and calculate the difference between the maximum and minimum values. This difference is the top clearance value between the drum-shaped tooth (41) and the inner tooth sleeve (42).

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