Precise closing-in tool for bearing under narrow working condition and force fixing method

Abstract

The invention belongs to the technical field of flying machine hole making bearing installation, and discloses a precise closing-in tool for a bearing under a narrow working condition and a force fixing method.The tool comprises a rotating shaft which is a stepped shaft, one end of the rotating shaft is provided with a bolt head, and the other end of the rotating shaft is provided with a thread part; the rolling part is mounted on the rotating shaft and comprises a roller, the roller can roll automatically along with rotation of the rotating shaft, and a circle of protrusions are arranged on the outer edge of the roller; and the fastening component is matched with the rotating shaft for use and at least comprises a fastening piece, a first rotating piece and a positioning sleeve. The technical problem that potential safety hazards exist due to the fact that no appropriate bearing closing-in tool exists under the special working condition in the prior art is solved. According to the bearing shell nosing device, shell nosing work of a bearing is simple and easy to implement, the bearing shell nosing device can be connected with a constant-force wrench for use, and for shell nosing work of a large number of bearings, working efficiency is greatly improved, and quality is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft hole making and bearing installation, and specifically relates to a precision closing tool and a force setting method for bearings under narrow working conditions. Background Art

[0002] During the aircraft assembly process, bearings are one of the most important factors in the connection and assembly of components. Since most aircraft body components are connected and assembled by bearings, there are many bearings on the aircraft with various models.

[0003] At present, aircraft body parts often encounter special working conditions (such as U-shaped and C-shaped workpieces) during installation, and cannot be installed with the help of machine tools such as drilling machines. There is no suitable bearing closing tool under special working conditions, and there are safety hazards in the installation of parts. The main problems are: because the bearing is large or the workpiece is too large, or there is no machine tool such as drilling machine, the bearing closing tool suitable for machine tools cannot be used for closing the bearing, and the requirements for bearing closing are higher in some cases that require fixed force. For the workload of 1 aircraft * 33 bearings / frames, it is urgent to find a tool that can directly close and fix the bearing under special working conditions to meet on-site use. Summary of the invention

[0004] The present invention discloses a precision closing tool and a force determination method for bearings in narrow working conditions, which can be well adapted to working conditions under different circumstances. For a large number of bearing closing works, the work efficiency is greatly improved while the quality is guaranteed. The manufacturing difficulty is also reduced, the number of processed parts is reduced, and the manufacturing cost is saved.

[0005] In order to achieve the above invention objectives, the technical solutions adopted in this application are as follows:

[0006] A precision closing tool for bearings in narrow working conditions, comprising:

[0007] A rotating shaft, which is a stepped shaft, having a bolt head at one end and a threaded portion at the other end;

[0008] A rolling component mounted on the rotating shaft comprises a roller, the roller can roll automatically with the rotation of the rotating shaft, and a circle of protrusions is provided on the outer edge of the roller;

[0009] The fastening component used in conjunction with the rotating shaft at least comprises a fastener, a first rotating member and a positioning sleeve.

[0010] As a further solution of the present invention: the rolling component is designed to be an I-shape, and has two symmetrically arranged rollers, the two rollers are installed on the rotating shaft through a connecting member, and a second rotating member is provided between the rollers and the connecting member.

[0011] As a further solution of the present invention: the connecting member is an axial member and has threaded portions at both ends. A through hole is opened in the radial direction of the rotating shaft, and the connecting member is arranged through the through hole. The two rollers are respectively installed at both ends of the connecting member and fastened with a first nut.

[0012] As a further solution of the present invention: a mounting hole is opened on the side of the roller, and the mounting hole adopts a stepped structure design. The second rotating member is a ball bearing, which is installed in the mounting hole. The roller is sleeved on the connecting member and fixedly connected with a cover plate. A gasket is also provided between the ball bearing and the rotating shaft.

[0013] As a further solution of the present invention: a bushing is also provided on the connecting member, and the bushing is used for fitting and installing the connecting member and the through hole of the rotating shaft, and the washer and the bushing need to be aligned.

[0014] As a further solution of the present invention: the cover plate adopts an annular design, which is fixedly connected to the side of the roller by a plurality of screws, and can partially cover the ball bearing, and the first nut is fastened to the cover plate.

[0015] As a further solution of the present invention: the positioning sleeve adopts a T-shaped structure design, which is used for the matching installation of the rotating shaft and the inner ring of the bearing.

[0016] As a further solution of the present invention: the first rotating member is a needle bearing, which is placed between the fastener and the positioning sleeve and installed on the rotating shaft, and the fastener is a second nut.

[0017] As a further solution of the present invention: the first nut and the second nut are both used in conjunction with matching gaskets when being tightened.

[0018] As a further solution of the present invention: a connecting hole is provided in the bolt head for use with a fixed force wrench.

[0019] A method for precisely closing and fixing the force of a bearing under narrow working conditions, using the above-mentioned tool, comprises the following steps:

[0020] According to the pressure range required in the closing process and the deformation of the bearing, select the appropriate pressure value, and ensure that the deformation of the bearing during operation is within the standard requirements. The roller is used to provide pressure in the rolling strengthening process;

[0021] After replacing bearings of different specifications, the distance between the roller and the bearing axis can be adjusted by replacing, adding or reducing washers until the distance between the roller protrusion and the bearing outer diameter meets the standard requirements;

[0022] Clamp the bearing to be closed on the positioning sleeve, clamp the positioning sleeve on the shaft, rotate the shaft to align the roller protrusion with the upper surface of the bearing, and the roller automatically rotates along the surface of the bearing to be closed under the action of the shaft. Continue to move the shaft slowly, and the pointer of the dial indicator of the fixed force wrench begins to rotate. When the depression on the upper surface of the bearing caused by the rolling of the roller protrusion meets the standard requirements, record this force value. When the pointer points to this force value, it means that the rolling pressure value meets the requirements at this time;

[0023] When processing the same batch of workpieces in the future, when the pointer points to this force value, the precision closing of the bearing under narrow working conditions is completed.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] 1. The closing and force-fixing functions of bearings under special working conditions are realized, which meets the production needs and lays the foundation for the technical research of closing and force-fixing tools for bearings under the same type of special working conditions.

[0026] 2. It simplifies the closing and force-fixing methods of the bearing, has a lower tool manufacturing cost, and improves application efficiency.

[0027] 3. This device is economical, simple and easy to operate and takes up little space.

[0028] The present application is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0030] In the attached picture:

[0031] Figure 1 This is a schematic diagram of the structure of the special closing and force-fixing tools for this application;

[0032] Figure 2 This is a schematic diagram of the use of the special closing and fixing tools for this application.

[0033] Explanation of the reference numerals in the figure: rotating shaft 1, bolt head 11, rolling component 2, roller 21, protrusion 211, fastening component 3, fastener 31, first rotating component 32, positioning sleeve 33, connecting component 22, second rotating component 23, first nut 24, mounting hole 212, cover plate 25, washer 26, bushing 27, connecting hole 111. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] First, as Figure 1-2 As shown, the present invention provides a precision closing tool for bearings in narrow working conditions, which includes:

[0036] The rotating shaft 1 is a stepped shaft having a bolt head 11 at one end and a threaded portion at the other end;

[0037] The rolling component 2 installed on the rotating shaft 1 includes a roller 21. The roller 21 can roll automatically with the rotation of the rotating shaft 1, and a circle of protrusions 211 is provided on the outer edge of the roller 21;

[0038] The fastening component 3 used in conjunction with the rotating shaft 1 at least includes a fastening member 31 , a first rotating member 32 and a positioning sleeve 33 .

[0039] Furthermore, the rolling component 2 is designed to be an I-shape, and has two symmetrically arranged rollers 21 . The two rollers 21 are mounted on the rotating shaft 1 via a connecting member 22 . A second rotating member 23 is provided between the rollers 21 and the connecting member 22 .

[0040] Furthermore, the connecting member 22 is a shaft-shaped member with threaded portions at both ends. A through hole is opened in the radial direction of the rotating shaft 1, and the connecting member 22 is arranged through the through hole. The two rollers 21 are respectively installed at both ends of the connecting member 22 and fastened with a first nut 24.

[0041] Furthermore, a mounting hole 212 is provided on the side of the roller 21, and the mounting hole 212 is designed with a stepped structure. The second rotating member 23 is a ball bearing, which is installed in the mounting hole 212. The roller 21 is sleeved on the connecting member 22 and fixedly connected with a cover plate 25. The cover plate 25 is designed in an annular shape and is fixedly connected to the side of the roller 21 by a number of screws, and it can partially cover the ball bearing. The first nut 24 is fastened to the cover plate 25. A washer 26 is also provided between the ball bearing and the rotating shaft 1, and a bushing 27 is also provided on the connecting member 22. The bushing 27 is used for the through hole of the connecting member 22 and the rotating shaft 1 to fit and install, and the washer 26 and the bushing 27 need to be aligned.

[0042] Furthermore, the positioning sleeve 33 adopts a T-shaped structure design, which is used for fitting the inner ring of the shaft 1 and the bearing. The first rotating member 32 is a needle bearing, which is placed between the fastener 31 and the positioning sleeve 33 and installed on the shaft 1. The fastener 31 is a second nut.

[0043] Furthermore, the first nut 24 and the second nut are both used in conjunction with matching gaskets when being tightened.

[0044] Furthermore, a connecting hole 111 is provided in the bolt head 11 for use with a fixed force wrench.

[0045] In a second aspect, the present invention provides a method for precisely closing and fixing the force of a bearing under narrow working conditions, using the above-mentioned closing tool, which comprises the following steps:

[0046] According to the pressure range required in the closing process and the deformation of the bearing, select a suitable pressure value, and ensure that the deformation of the bearing during operation is within the standard requirements. The roller 21 is used to provide pressure in the rolling strengthening process;

[0047] After replacing bearings of different specifications, the distance between the roller 21 and the bearing axial direction can be adjusted by replacing, adding or reducing the gasket 26 until the distance between the protrusion 211 of the roller 21 and the outer diameter of the bearing meets the standard requirements;

[0048] The bearing to be closed is clamped on the positioning sleeve 33, and the positioning sleeve 33 is clamped on the shaft 1. The shaft 1 is rotated to align the protrusion 211 of the roller 21 with the upper surface of the bearing. The roller 21 automatically rotates along the surface of the bearing to be closed under the action of the shaft 1. The shaft 1 is continued to be slowly moved, and the pointer of the dial indicator of the fixed force wrench begins to rotate. When the depression on the upper surface of the bearing caused by the rolling of the protrusion 211 of the roller 21 meets the standard requirements, this force value is recorded. When the pointer points to this force value, it means that the rolling pressure value meets the requirements at this time;

[0049] When processing the same batch of workpieces in the future, when the pointer points to this force value, the precision closing of the bearing under narrow working conditions is completed.

[0050] In a third aspect, the present invention provides an embodiment.

[0051] The closing tool comprises a second nut, a needle bearing, a positioning sleeve 33, a first nut 24, a cover plate 25, a roller 21, a rotating shaft 1, a washer 26, a ball bearing, a connector 22 and a bushing 27. The rotating shaft 1 is a stepped shaft, with a bolt head 11 at one end and a threaded portion at the other end. The bolt head 11 is a hexagonal head with a connecting hole 111 therein, and the connecting hole 111 is a square hole. The rotating shaft 1 also has a waist-shaped shaft, and a through hole matching the outer diameter of the bushing 27 is opened in the radial direction of the waist-shaped shaft. The bushing 27 passes through the waist-shaped shaft through hole, the connecting piece 22 passes through the bushing 27, and the washer 26 passes through one end of the connecting piece 22 and is aligned with the bushing 27. The small hole end of the roller 21 mounting hole 212 passes through the connecting piece 22 and contacts with the washer 26. The ball bearing passes through the connecting piece 22 and contacts with the large hole end of the roller 21 mounting hole 212. The cover plate 25 is pressed against the outer surface of the roller 21 and is firmly connected with screws. Then, the gasket passes through the connecting piece 22 to press against the inner end of the outer side of the ball bearing, and then the first nut 24 is connected. Then tighten it on the connecting piece 22, repeat the above operation to install the roller 21 at the other end, place the positioning sleeve 33 in the workpiece, insert the upper part of the installed tool into the positioning sleeve 33, and the roller 21 contacts the surface of the workpiece. Then pass the needle bearing under the rotating shaft 1, put on the gasket, tighten the second nut, and after fixing the second nut, connect the fixed force wrench to the square hole in the hexagonal head of the rotating shaft 1, rotate the hexagonal head of the rotating shaft 1, and observe the position of the fixed force wrench pointer. When the pointer position is at the required position, it proves that the pressure given at this time is the allowable pressure value, and the closing of the bearing on the workpiece is completed.

[0052] An inner square hole is opened at the upper end of the hexagonal head part of the rotating shaft 1, which can be connected with a fixed force wrench. The rod part of the rotating shaft 1 is divided into a waist-shaped shaft near the hexagonal head. The waist-shaped shaft and the hexagonal head adopt a curved surface design. A through hole matching the outer diameter of the bushing 27 is opened on the waist-shaped shaft. The length of the through hole is consistent with the length of the bushing 27. The position of the through hole must meet the requirement that after the tool is assembled, the upper part of the roller 21 has a certain distance from the hexagonal head, and the lower part of the bushing 27 has a certain distance from the lower end of the waist-shaped shaft.

[0053] The outer diameter of the middle part of the rotating shaft 1 matches with the inner diameter of the positioning sleeve 33, and the threaded part of the rotating shaft 1 matches with the inner thread of the second nut and the inner diameter of the needle bearing. The length of the threaded part of the rotating shaft 1 needs to be greater than the sum of the lengths of the second nut and the needle bearing. After assembly is completed, the sum of the length of the middle part of the rotating shaft 1 and the length of the threaded part of the rotating shaft 1 exceeding the needle bearing must be greater than the sum of the lengths of the workpiece and the positioning sleeve 33. The length of the threaded part of the rotating shaft 1 is determined by the sum of the heights of the needle bearing and the second nut.

[0054] The diameter of the smooth rod of the connecting member 22 matches the inner diameter of the bushing 27, and the external threads at both ends of the connecting member 22 match the first nut 24 and the gasket.

[0055] The roller 21 is a rotating body, the large hole diameter of the internal mounting hole 212 matches the outer diameter of the ball bearing, and the small hole diameter needs to be larger than the outer diameter of the bushing 27 and smaller than the outer diameter of the ball bearing.

[0056] There are three through holes on the outer end of the roller 21, which are connected and fastened to the cover plate 25 by screws. The internal threads of the through holes cooperate with the external threads of the screws. There is a circle of arc-shaped protrusions 211 on the outer side of the roller 21 for bearing closing. The arc length is determined by the bearing closing standard of the workpiece being processed.

[0057] The cover plate 25 is an annular cylinder, and the diameter of the through hole is consistent with the small hole diameter of the step hole of the roller 21. There are three countersunk threaded holes on the outer end of the cover plate 25, which are connected and fastened to the roller 21 by screws, and its position needs to match the three through holes on the outer end of the roller 21.

[0058] The first nut 24 and the gasket can be selected from standard parts, and the internal thread of the first nut 24 matches the external thread of the connecting member 22.

[0059] The outer diameter of the gasket matched with the first nut 24 needs to be close to the inner diameter of the ball bearing, and the inner diameter is close to the outer diameter of the polished rod of the connecting member 22.

[0060] After the first nut 24 is tightened, the matching gasket presses against the upper surface of the ball bearing, one end of the gasket 26 presses against the lower surface of the ball bearing, and the other end presses against the bushing 27. After the cover plate 25 and the roller 21 are fixed by screws, the length of the gasket 26 must meet the requirements of the closing standard: the distance between the arc-shaped protrusion 211 on the outer side of the roller 21 and the outer diameter of the workpiece bearing to be processed meets the requirements of the closing standard. After replacing bearings of different specifications, the distance between the roller 21 and the bearing axial direction can be adjusted by replacing, adding or reducing gaskets 26 until the distance between the protrusion 211 of the roller 21 and the outer diameter of the bearing meets the standard requirements.

[0061] The outer diameter of the positioning sleeve 33 matches the inner diameter of the bearing of the workpiece being processed.

[0062] The second nut and the needle bearing can be selected as standard parts. The inner thread of the second nut and the inner diameter of the needle bearing need to match the outer diameter of the threaded part of the shaft 1, and the outer diameter of the second nut and the needle bearing need to be close to the outer diameter of the flange part of the positioning sleeve 33.

[0063] So far, the purpose of the present invention has been achieved.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision closing tool for bearings in narrow working conditions, characterized in that: include: A rotating shaft, which is a stepped shaft, having a bolt head at one end and a threaded portion at the other end; A rolling component mounted on the rotating shaft comprises a roller, the roller can roll automatically with the rotation of the rotating shaft, and a circle of protrusions is provided on the outer edge of the roller; The fastening component used in conjunction with the rotating shaft at least comprises a fastener, a first rotating member and a positioning sleeve.

2. A precision closing tool for bearings in narrow working conditions according to claim 1, characterized in that: The rolling component is designed to be an I-shape and has two symmetrically arranged rollers. The two rollers are mounted on the rotating shaft via a connecting member, and a second rotating member is provided between the rollers and the connecting member.

3. A precision closing tool for bearings in narrow working conditions according to claim 2, characterized in that: The connecting member is a shaft-shaped member with threaded parts at both ends. A through hole is opened in the radial direction of the rotating shaft. The connecting member is arranged through the through hole. The two rollers are respectively installed at both ends of the connecting member and fastened with a first nut.

4. A precision closing tool for bearings in narrow working conditions according to claim 3, characterized in that: A mounting hole is provided on the side of the roller, and the mounting hole adopts a stepped structure design. The second rotating member is a ball bearing, which is installed in the mounting hole. The roller is sleeved on the connecting member and fixedly connected with a cover plate. A gasket is also provided between the ball bearing and the rotating shaft.

5. A precision closing tool for bearings in narrow working conditions according to claim 4, characterized in that: A bushing is also provided on the connecting piece, and the bushing is used for fitting and installing the connecting piece and the through hole of the rotating shaft, and the washer and the bushing need to be aligned.

6. A precision closing tool for bearings in narrow working conditions according to claim 4, characterized in that: The cover plate is annular in design and is fixedly connected to the side of the roller by a plurality of screws. The cover plate can partially cover the ball bearing. The first nut is fastened to the cover plate.

7. A precision closing tool for bearings in narrow working conditions according to claim 6, characterized in that: The positioning sleeve adopts a T-shaped structure design and is used for the fitting installation of the rotating shaft and the inner ring of the bearing.

8. A precision closing tool for bearings in narrow working conditions according to claim 7, characterized in that: The first rotating member is a needle bearing, which is placed between the fastener and the positioning sleeve and installed on the rotating shaft. The fastener is a second nut. The first nut and the second nut are both used in conjunction with matching gaskets when fastened.

9. A precision closing tool for bearings in narrow working conditions according to any one of claims 1 to 8, characterized in that: A connecting hole is arranged in the bolt head and is used in conjunction with a fixed force wrench.

10. A method for precisely closing and fixing the force of a bearing under narrow working conditions, using the tool of claim 9, characterized in that: The steps include: According to the pressure range required in the closing process and the deformation of the bearing, select the appropriate pressure value, and ensure that the deformation of the bearing during operation is within the standard requirements. The roller is used to provide pressure in the rolling strengthening process; After replacing bearings of different specifications, the distance between the roller and the bearing axis can be adjusted by replacing, adding or reducing washers until the distance between the roller protrusion and the bearing outer diameter meets the standard requirements; Clamp the bearing to be closed on the positioning sleeve, clamp the positioning sleeve on the shaft, rotate the shaft to align the roller protrusion with the upper surface of the bearing, and the roller automatically rotates along the surface of the bearing to be closed under the action of the shaft. Continue to move the shaft slowly, and the pointer of the dial indicator of the fixed force wrench begins to rotate. When the depression on the upper surface of the bearing caused by the rolling of the roller protrusion meets the standard requirements, record this force value. When the pointer points to this force value, it means that the rolling pressure value meets the requirements at this time; When processing the same batch of workpieces in the future, when the pointer points to this force value, the precision closing of the bearing under narrow working conditions is completed.

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