Needle bearing measuring device based on iris mechanism

Abstract

The utility model discloses a needle bearing measuring device based on an iris mechanism, and relates to the technical field of unmanned aerial vehicle aero-engines. The device comprises a disc body, a control disc, a plurality of sliding blocks arranged between the disc body and the control disc, and a digital display measuring scale arranged on the control disc, according to the invention, by rotating the control disc, each control disc guide groove pushes the embedded upper guide column, the corresponding slide block is driven to move inwards or outwards along the radial direction, and the to-be-measured bearing placed in the through hole is measured by using the limiting column arranged on each slide block. And the numerical value of the inner diameter or the outer diameter of the bearing to be measured is read through the digital display measuring scale.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) aero-engine technology, and more specifically to a needle roller bearing measuring device based on an iris mechanism. Background Technology

[0002] Most operational unmanned aerial vehicles (UAVs) use internal combustion engines as their direct power source. Smooth rotation of the engine spindle is crucial for ensuring power output. The connection between the spindle and the engine body is primarily achieved through bearings. To meet the high-speed and lightweight design requirements of aero engines, bearings such as needle roller bearings without inner rings or needle roller bearings without inner and outer rings are commonly used. Measuring the actual dimensions of the bearings and properly matching their working clearances are key to ensuring engine performance.

[0003] The main problems in the existing bearing measurement and use process are as follows: (1) There is clearance between the bearing needle roller and the cage and the outer ring of the bearing. Traditional measurement cannot guarantee that the needle roller is in close contact with the cage and outer ring on one side (the clearance on one side is zero), and the measurement results are not reliable. (2) The existing bearing measurement method is an indirect range selection, which can only obtain the size range of the bearing size and cannot obtain accurate values. For newly selected bearings, due to the lack of experience data, it is impossible to measure. (3) In actual use, since the working inner diameter of the bearing cannot be accurately measured, it is impossible to select the bearing and the engine spindle. The bearing accuracy depends entirely on the manufacturer. If imported bearings are used, it is not easy to select the overall dimensions of the engine assembly and analyze potential faults. Summary of the Invention

[0004] To address the shortcomings of the aforementioned background technology and to solve the measurement problem of engine bearings, thereby achieving a reasonable matching between bearings and the engine spindle, this invention provides a needle roller bearing measuring device based on an iris mechanism. This method eliminates the contact gap of the bearing needle rollers through the iris mechanism, enabling precise measurement of the bearing's working inner and outer diameters, obtaining the bearing's true operating parameters, improving bearing controllability, and enhancing the overall quality of the engine.

[0005] The purpose of this invention is to provide a needle roller bearing measuring device based on an iris mechanism, comprising a disc body, a control disc, a plurality of sliders disposed between the disc body and the control disc, and a digital display measuring ruler disposed on the control disc;

[0006] The central part of the disk body has a through hole for placing the bearing to be tested;

[0007] The control panel has multiple control panel guide grooves evenly spaced along the circumference on one side facing the slider.

[0008] One end of each control panel guide groove is close to the center of the control panel, and the other end is close to the outer edge of the control panel; the direction of each control panel guide groove is arc-shaped; the two ends of each control panel guide groove are on different radial directions;

[0009] Each slider is a fan-shaped structure. A limit post is set at the center of the fan-shaped structure on one side of each slider. Each limit post passes through the through hole on the disk body for placing the bearing to be tested. An upper guide post is set at the edge of the fan-shaped structure on the other side of each slider. Each upper guide post is inserted into a corresponding control disk guide groove. Each slider is radially slidably connected to the disk body.

[0010] Preferably, each slider is slidably connected to the disk body radially, including:

[0011] Each slider is provided with a lower guide post at a position symmetrical to the upper guide post;

[0012] The disc body has multiple housing guide grooves evenly spaced circumferentially on one side facing the slider; wherein each housing guide groove is arranged radially.

[0013] The lower guide post on each slider is embedded in the corresponding housing guide groove, so that the slider and the disk body slide together radially.

[0014] Preferably, by rotating the control disk, each control disk guide groove pushes the embedded upper guide post, causing the corresponding slider to move radially inward, so that all the sliders are assembled together to form a circular structure, while the limiting posts on each slider are in close contact with each other.

[0015] Preferably, the limiting post, the upper guide post, and the lower guide post are all perpendicular to the slider; the limiting post and the lower guide post are located on one side of the slider.

[0016] Preferably, it also includes a shell with a cylindrical structure, the two ends of which are open; the disc, the control disc, and a plurality of sliders between the disc and the control disc are disposed inside the shell;

[0017] The disc body is located at one open end of the housing, and the control panel is located at the other open end of the housing; a cover plate is also provided at the end of the housing where the control panel is located.

[0018] The disk body and control disk are both aligned with the axis of the housing.

[0019] Preferably, a transmission hole is provided in the center of the cover plate, and a cylinder is connected to the transmission hole;

[0020] A pivot is inserted inside the cylinder;

[0021] One end of the pivot is connected to the control panel via a transmission hole, and the other end is provided with a rotating handle.

[0022] Preferably, one end of the pivot is connected to the control disk via a transmission hole, comprising:

[0023] The pivot is equipped with a sun gear at one end that is connected to the control disk in a transmission manner;

[0024] The sun gear is located inside the cylinder and is coaxial with the cylinder;

[0025] The sun gear is meshed with multiple planetary gears at equal intervals with the inner wall of the cylinder, wherein the inner wall of the cylinder is provided with a ring gear that meshes with each planetary gear in the circumferential direction.

[0026] Multiple planetary gears are mounted on a gear support, which is connected to the center of the control panel;

[0027] By turning the pivot with the handle, the sun gear is driven to rotate, and the planetary gears begin to rotate on their own axis and revolve around the sun. Their revolution drives the gear support to rotate, which in turn drives the control panel to rotate.

[0028] Preferably, a protective sleeve is also provided at the pivot located between the cylinder and the rotating handle, with one end of the protective sleeve sleeved on the cylinder and the other end connected to the pivot via an internal thread;

[0029] The sun gear is mounted on the pivot.

[0030] The pivot has at least two symmetrical first cut surfaces along the axial direction on the surface on which the sun gear is fitted; the sun gear is fitted onto the inner wall of the central bore on the pivot and has a second cut surface corresponding to each of the first cut surfaces.

[0031] The inner wall of the central bore of the sun gear is fitted with a clearance fit to the pivot.

[0032] The digital measuring scale is mounted on the protective cylinder. The distance the pivot moves along the axial direction is recorded by the digital measuring scale, and the working inner or outer diameter of the bearing under test is measured.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] This invention provides a needle roller bearing measuring device based on an iris mechanism. The invention rotates a control disk, causing each control disk guide groove to push the embedded upper guide post, which in turn drives the corresponding slider to move radially inward or outward. The limiting post set on each slider measures the bearing to be tested placed in the through hole, and the inner or outer diameter of the bearing to be tested is read out by a digital display measuring ruler.

[0035] The bearing measuring device provided by this invention can measure the working inner diameter of needle roller bearings without inner rings, and can also be used to measure the working inner and outer diameters of needle roller bearings without inner or outer rings. The measurement method and unit can be selected as needed, it is easy to operate, has a wide range of applications, and improves the controllability of the true dimensions of engine bearings. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the internal structure of the needle roller bearing measuring device based on the iris mechanism provided by the present invention.

[0037] Figure 2 This is a schematic diagram of the disk structure;

[0038] Figure 3 This is a schematic diagram of the control panel structure;

[0039] Figure 4 This is a schematic diagram of the slider structure;

[0040] Figure 5 This is a schematic diagram of the external structure of a needle roller bearing measuring device based on an iris mechanism.

[0041] Figure 6 This is a schematic diagram of a pivot drive connection structure;

[0042] Figure 7 This is a schematic diagram showing the bearing working inner diameter measurement located on one side of the control panel in this embodiment;

[0043] Figure 8 This is a schematic diagram showing the bearing working inner diameter measurement located on one side of the disc body in this embodiment;

[0044] Figure 9 This is a schematic diagram showing the bearing working outer diameter measurement located on one side of the control panel in this embodiment;

[0045] Figure 10 This is a partial schematic diagram of the bearing working outer diameter measurement on one side of the disc body in this embodiment. Detailed Implementation

[0046] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings. However, the embodiments described are not intended to limit the present invention.

[0047] The purpose of this invention is to solve the measurement problem of engine bearings and achieve reasonable matching between bearings and engine spindles. It provides a needle roller bearing measuring device based on an iris mechanism. It mainly provides a bearing measuring mechanism that is simple to operate and highly reliable. By eliminating the contact gap of the bearing needle rollers through the iris mechanism, the working inner diameter and working outer diameter of the bearing can be accurately measured, the true working parameters of the bearing can be obtained, the controllability of the bearing can be improved, and the overall quality of the engine can be enhanced.

[0048] See Figures 1-10 As shown, a needle roller bearing measuring device based on an iris mechanism includes a disc body 12, a control disc 10, a plurality of sliders 11 disposed between the disc body 12 and the control disc 10, and a digital display measuring ruler 4 disposed on the control disc 10.

[0049] The central part of the disk body 12 has a through hole for placing the bearing to be tested;

[0050] The control disk 10 has multiple control disk guide grooves 101 evenly spaced along the circumference on one side facing the slider 11;

[0051] One end of each control panel guide groove 101 is close to the center of the control panel 10, and the other end is close to the outer edge of the control panel 10; the direction of each control panel guide groove 101 is arc-shaped; the two ends of each control panel guide groove 101 are on different radial directions.

[0052] Each slider 11 has a fan-shaped structure. A limiting post 113 is located at the center of the fan-shaped structure on one side of each slider 11, and each limiting post 113 penetrates a through hole in the disk body 12 for placing the bearing to be tested. An upper guide post 112 is located at the edge of the fan-shaped structure on the other side of each slider 11, and each upper guide post 112 is inserted into a corresponding control disk guide groove 101. Each slider 11 is radially slidably connected to the disk body 12. It should be noted that both the control disk 10 and the disk body 12 are disc-shaped.

[0053] The present invention uses a rotating control disk 10 to push the embedded upper guide post 112 of each control disk guide groove 101, thereby driving the corresponding slider 11 to move radially inward or outward. The limiting post 113 set on each slider 11 is used to measure the bearing to be tested placed in the through hole, and the inner diameter or outer diameter value of the bearing to be tested is read by the digital display measuring ruler 4.

[0054] To achieve a radial sliding connection between the slider 11 and the disk body 12, each slider 11 is radially slidingly connected to the disk body 12, including:

[0055] Each slider 11 is provided with a lower guide post 111 on the opposite side symmetrical to the upper guide post 112;

[0056] The disc body 12 has a plurality of housing guide grooves 121 evenly spaced around its side facing the slider 11; wherein each housing guide groove 121 is arranged radially; and each housing guide groove 121 corresponds to a lower guide post 111;

[0057] The lower guide post 111 on each slider 11 is embedded in the corresponding housing guide groove 121, so that the slider 11 and the disk 12 are slidably connected in the radial direction; thereby realizing the radial slidable connection between each slider and the disk 12.

[0058] The limiting post 113, the upper guide post 112, and the lower guide post 111 are all perpendicular to the slider 11; the limiting post 113 and the lower guide post 111 are located on one side of the slider 11.

[0059] To measure the working inner diameter of the bearing, the control disk 10 can be rotated so that each control disk guide groove 101 pushes the embedded upper guide post 112, causing the corresponding slider 11 to move radially inward, so that all the sliders 11 are assembled together to form a circular structure. At the same time, the limiting posts 113 on each slider 11 are in close contact with each other.

[0060] The measuring device also includes a housing 1 with a cylindrical structure, which is open at both ends; the disc 12, the control disc 10, and a plurality of sliders 11 between the disc 12 and the control disc 10 are disposed inside the housing; wherein, the disc is located at one open end of the housing, and the control disc is located at the other open end of the housing;

[0061] The housing is also provided with a cover plate 2 at one end of the control panel 10; the axis of the panel 12 and the control panel 10 are both coaxial with the axis of the housing. The outer circumferential edge of the cover plate is fixed to the housing 1 by screws 3.

[0062] In order to enable the rotation of the control panel, a transmission hole is provided in the center of the cover plate 2, and a cylinder is connected to the transmission hole; a pivot is inserted into the cylinder; one end of the pivot is connected to the control panel through the transmission hole, and the other end is provided with a rotating handle 6.

[0063] To achieve a transmission connection between one end of the pivot and the control disk via a transmission hole, the following is included:

[0064] The pivot is equipped with a sun gear 7 at one end that is connected to the control disk in a transmission manner.

[0065] The sun gear 7 is located inside the cylinder and is coaxial with the cylinder;

[0066] The sun gear is meshed with three planetary gears 8 at equal intervals with the inner wall of the cylinder, wherein the inner wall of the cylinder is provided with a ring gear that meshes with each planetary gear in the circumferential direction.

[0067] Multiple planetary gears 3 are mounted on a gear support 9, which is connected to the center of the control panel 10;

[0068] By rotating the pivot with the handle, the sun gear is driven to rotate, and the planetary gears begin to rotate on their own axis and revolve around the sun. Their revolution drives the gear support 9 to rotate, thereby driving the control panel to rotate.

[0069] It is understandable that one end of the pivot is the sun gear, and the other end is the rotating handle. By rotating the handle, the sun gear is rotated, and the planetary gears begin to rotate on their own axis and revolve around the sun. Their revolution drives the gear carrier to rotate, and the gear carrier is connected to the control panel, thereby driving the control panel to rotate.

[0070] As can be seen, rotating the pivot via the handle drives the control disc to rotate. The cylinder serves as a base, containing a ring gear. The base, planetary gears, sun gear, and gear carrier together form a planetary gear reduction mechanism, which improves measurement and control accuracy. During rotation, the planetary gears ensure smoother pivot rotation and allow for more accurate bearing measurements.

[0071] In addition, to reduce the weight of the device, the center of the control panel is made hollow, and a crossbeam 102 is arranged radially in the hollow, wherein the crossbeam 102 is connected to the gear bracket 9.

[0072] In order to read the measurement values ​​of the bearing, a protective sleeve 5 is also provided on the pivot between the cylinder and the rotating handle. One end of the protective sleeve 5 is sleeved on the cylinder, and the other end is connected to the pivot through an internal thread; the pivot is provided with an external thread that matches the internal thread.

[0073] The sun gear 7 is mounted on the pivot.

[0074] The pivot has at least two symmetrical first cut surfaces along the axial direction on the surface of the portion on which the sun gear 7 is fitted; the sun gear 7 is fitted onto the inner wall of the central bore on the pivot and has a second cut surface corresponding to each of the first cut surfaces.

[0075] The inner wall of the central bore of the sun gear 7 is fitted with a clearance fit to the pivot.

[0076] The digital display measuring ruler 4 is installed on the protective cylinder. The distance the pivot moves along the axial direction is recorded by the digital display measuring ruler 4, and the working inner or outer diameter of the bearing under test is measured.

[0077] It should be noted that the pivot and the protective cylinder 5 are connected by an internal thread. When the pivot rotates in the internal thread on the protective cylinder 5, since the protective cylinder is fixedly sleeved on the cylinder body, the rotating pivot will move along the axial direction. That is, the internal thread can be regarded as a nut, and the pivot will screw in or out through the nut. In addition, there is a gap between the pivot and the sun gear 7, and it will move along the axial direction of the central hole of the sun gear. At the same time, since the pivot has a symmetrical first tangent and a corresponding second tangent on the inner wall of the central hole of the sun gear 7, the pivot will drive the sun gear to rotate under the action of the tangent.

[0078] In addition, the gear bracket and the crossbeam have pre-drilled holes for the pivot to move axially.

[0079] As can be seen, the pivot is used to control the rotation of the control disc. Rotating the pivot via the handle drives the planetary gear reduction mechanism, which in turn drives the control disc to rotate. The control disc controls the slider to move along the guide groove of the control disc and the guide groove of the housing. The slider limit post is used to eliminate the gap between the needle roller and the cage. The distance the pivot moves axially is measured by the digital display measuring scale on the protective cylinder, indirectly obtaining the working dimension of the bearing being measured.

[0080] To further illustrate the measurement of different bearings using the iris-based needle roller bearing measuring device provided by this invention, the accompanying drawings are provided.

[0081] See Figures 7-8 As shown, an iris-based needle roller bearing measuring device is used to measure the working inner diameter of a bearing, specifically applicable to the measurement of the working inner diameter of needle roller bearing 001 without an inner ring and needle roller bearing 001 without inner or outer rings. Specifically, it includes:

[0082] During measurement, rotate the pivot by the handle to move the limit pin 113 on the slider inward to the center limit position, and zero the digital display measuring scale;

[0083] Set the digital measuring scale to inner diameter measurement mode, place the bearing to be measured 001, and keep the bearing end face in contact with the disc end face. Gradually rotate the pivot to move the limit pins on the slider outward until all limit pins are in contact with the inner cylindrical surface of the bearing;

[0084] Rotate the pivot slowly until the gap between the needle roller and the cage on the bearing under test is eliminated, then obtain the working inner diameter value of the bearing under test through a digital display measuring ruler.

[0085] After the measurement is completed, rotate the pivot in the opposite direction to release the bearing from its locked state and remove the bearing.

[0086] See Figures 9-10 As shown, an iris-based needle roller bearing measuring device is used to measure the working outer diameter of a bearing, specifically applicable to measuring the working outer diameter of needle roller bearings without inner or outer rings. Specifically, it includes:

[0087] During measurement, the pivot is rotated by the handle, causing the limit pin 113 on the slider to move inward to the center limit position, and the digital display measuring scale is zeroed.

[0088] Set the digital measuring ruler to outer diameter measurement mode, rotate the pivot to make the limit pin on the slider move outward until it is greater than the outer diameter of the bearing to be measured 002.

[0089] Place the bearing 002 to be tested, and gradually rotate the pivot to make the limiting post 113 on the slider move inward until the limiting post on the slider contacts the outer cylindrical surface of the bearing 002.

[0090] Rotate the pivot slowly until the gap between the needle roller and the cage on the bearing under test is eliminated. Then, obtain the working outer diameter value of the bearing under test using a digital measuring scale.

[0091] After the measurement is completed, rotate the pivot in the opposite direction to release the bearing lock and remove bearing 002.

[0092] It should be noted that this engine can also be used to measure the inner and outer diameters of parts with similar structures.

[0093] This invention describes preferred embodiments and their effects. However, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to include both the preferred embodiments and all changes and modifications falling within the scope of this invention.

[0094] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An iris mechanism based needle bearing measuring device, characterized by, The disc body and the control disc are provided with a plurality of sliders between them, and a digital display measuring scale is arranged on the control disc; A through hole for placing the bearing to be measured is arranged in the central part of the disc body; A plurality of control disc guide grooves are arranged on the side of the control disc facing the sliders along the circumference at equal intervals; One end of each control disc guide groove is close to the center of the control disc, and the other end is close to the outer edge of the control disc; the trend of each control disc guide groove is arc-shaped; the two ends of each control disc guide groove are in different radial directions; Each slider is a fan-shaped structure, a limiting column is arranged at the center of the fan-shaped structure on one side of each slider, and each limiting column penetrates the through hole of the disc body for placing the bearing to be measured; an upper guide column is arranged at the edge of the fan-shaped structure on the other side of each slider, and each upper guide column is inserted into a control disc guide groove; each slider is radially slidably connected with the disc body.

2. The iris mechanism based roller pin bearing measuring device of claim 1, wherein, Each slider is radially slidably connected with the disc body, comprising: A lower guide column is arranged at the symmetric position of the upper guide column on each slider; A plurality of shell guide grooves are arranged on the side of the disc body facing the sliders along the circumference at equal intervals; wherein each shell guide groove is arranged along the radial direction; The lower guide column on each slider is embedded in the corresponding shell guide groove, so that the slider is radially slidably connected with the disc body.

3. The iris mechanism based roller bearing measurement device of claim 1, wherein, By rotating the control disc, each control disc guide groove pushes the embedded upper guide column, driving the corresponding slider to move inward along the radial direction, so that all the sliders are assembled together to form a circular structure, and at the same time, the limiting columns on each slider are tightly attached to each other.

4. The iris mechanism based roller bearing measurement device of claim 1, wherein, The limiting column, the upper guide column and the lower guide column are perpendicular to the slider; the limiting column and the lower guide column are located on one side of the slider.

5. The iris mechanism based roller bearing measurement device of claim 1, wherein, It also includes a shell with a cylindrical structure, both ends of which are open; the disc body, the control disc and the plurality of sliders between the disc body and the control disc are arranged in the shell; Among them, the disc body is located at one end of the open end of the shell, and the control disc is located at the other end of the open end of the shell; a cover plate is further arranged at one end of the control disc in the shell; The disc body and the control disc are coaxial with the axis of the shell.

6. The iris mechanism based roller pin bearing measuring device of claim 5, wherein, A transmission hole body is arranged in the center of the cover plate, and a cylinder is connected to the transmission hole body; A pivot is arranged in the cylinder; One end of the pivot is in transmission connection with the control disc through the transmission hole body, and the other end is provided with a rotating handle.

7. The iris mechanism based roller bearing measurement device of claim 6, wherein, One end of the pivot is in transmission connection with the control disc through the transmission hole body, comprising: A sun gear is arranged at one end of the pivot in transmission connection with the control disc; The sun gear is located in the cylinder and coaxial with the cylinder; A plurality of planetary gears are arranged at equal intervals between the sun gear and the inner wall of the cylinder, wherein the inner wall of the cylinder is circumferentially provided with a ring gear meshing with each planetary gear; A plurality of planetary gears are arranged on a gear support, and the gear support is connected with the center of the control disc; By rotating the handle to rotate the pivot, the sun gear is driven to rotate, and the planetary gears begin to rotate and revolve, and the revolution drives the gear support to rotate, thereby driving the control disc to rotate.

8. The iris mechanism based roller pin bearing measuring device of claim 7, wherein, The pivot is sleeved with a protection cylinder between the cylinder and the rotating handle, one end of the protection cylinder is sleeved on the cylinder, and the other end is connected with the pivot through internal threads; The sun gear is sleeved on the pivot; At least two symmetrical first cutting surfaces are arranged on the surface of the pivot which is sleeved with the sun gear, and the inner wall of the central hole of the sun gear is provided with a second cutting surface corresponding to each first cutting surface; The central hole of the sun gear is arranged in gap fit with the pivot; The digital display measuring scale is arranged on the protection cylinder, the distance of the pivot moving along the axial direction is recorded through the digital display measuring scale, and the working inner diameter or outer diameter value of the measured bearing is measured.

Images