Universal earring bolt bearing axial clearance measuring tool

Abstract

The utility model relates to the technical field of aviation measuring tools, in particular to a universal earring bolt bearing axial clearance measuring tool which comprises a main support, a fixing portion and a measuring portion. The main support is of a square cavity structure with an opening in the upper end; concentric circular holes are formed in the left and right sides of the main support close to the upper end, and concentric threaded holes are formed in the front and rear sides close to the middle position; the fixing part comprises a front ejector rod, a rear ejector rod, V-shaped iron, a stop baffle plate and a tightening hand wheel which are symmetrically arranged, and is used for fixing and clamping a rod part of the earring bolt to be detected; the measuring part comprises a left ejector rod, a right ejector rod, a left ejector disc and a right ejector disc which are symmetrically arranged, and further comprises a spring, a dovetail sliding rail, a dovetail groove, a fastening bolt, a meter rod clamp and a dial indicator, and the measuring part is used for abutting against the head of the earring bolt to be measured for measurement. According to the utility model, to-be-measured earring bolts of different specifications can be rapidly and stably clamped for measurement, the measurement precision and the measurement efficiency are high, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation measuring tools, in particular to a universal earring bolt bearing axial clearance measuring tool. Background Art

[0002] The deflection of various control surfaces on the aircraft is completed by the hydraulic actuator. On the hydraulic actuator, a specially designed bolt called an earring bolt is installed at the end of the piston rod. The head of the earring bolt is clamped with a ball bearing. The clearance of the ball bearing in the axial movement is called the axial clearance of the earring bolt bearing. If the axial clearance of the earring bolt bearing is too large and exceeds the design standard, after the connection, the large clearance will cause a scissor difference between the aircraft control surface and the fuselage structure, destroying the aerodynamic shape, causing vibration problems of the aircraft, and easily causing flight safety accidents. Therefore, in order to ensure flight safety, when assembling the earring bolt on the hydraulic actuator, it is necessary to measure whether the axial clearance of the earring bolt bearing to be assembled meets the safety standard.

[0003] At present, the assembly workshop has no special tools for measuring the axial clearance of earring bolt bearings, and the measurement method is mainly manual measurement: one is that the assembly personnel with many years of work experience move the ball bearing left and right with both hands to judge whether the clearance is out of tolerance based on experience; the other is that the assembly personnel fix the micrometer on the table, use a wrench to axially clamp the head ball bearing with one hand, and push and pull the earring bolt with the other hand to make it produce relative displacement, and measure the relative displacement with the micrometer.

[0004] In actual operation, the above-mentioned prior art has the following deficiencies: 1. It is overly dependent on personnel experience. Due to the cumbersome measurement and clamping, the difference in the force and the swing amplitude of the outer ring, the measurement results of the same bearing by different people at different times are different, and the error is also very large. It is easy to misjudge that the earring bolts are unqualified, resulting in waste of resources and increased costs; 2. Manual operation is time-consuming and labor-intensive, and the measurement efficiency is low. In addition, the earring bolts installed on the actuator of aircraft of different sizes are of different sizes, and the size of the ball bearing is also different. Therefore, there is an urgent need for a universal earring bolt bearing axial clearance measurement tool that can meet the measurement of the axial clearance of earring bolt bearings of different sizes. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a universal earring bolt bearing axial clearance measuring tool, which can be used to measure the axial clearances of different earring bolt bearings.

[0006] The technical solution of the utility model is:

[0007] A universal earring bolt bearing axial clearance measuring tool, comprising a main support, a fixing part and a measuring part;

[0008] The main support is a square cavity structure with an open upper end; concentric circular holes are provided on the left and right sides of the main support near the upper end, and concentric threaded holes are provided on the front and rear sides near the middle; the upper and lower ends of the front and rear sides of the main support are hollowed out to facilitate the removal and clamping of the earring bolts to be tested;

[0009] The fixing part is installed on the main support through the concentric threaded holes on the front and rear sides of the main support, and includes a symmetrically arranged front push rod, a rear push rod, a V-shaped iron, a stop baffle, and a tightening hand wheel, which are used to fix and clamp the rod of the earring bolt to be tested;

[0010] The measuring part is installed on the main support through the concentric circular holes on the left and right sides of the main support and the right side surface, and includes a symmetrically arranged left top rod, a right top rod, a left top plate, and a right top plate, as well as a spring, a dovetail slide rail, a dovetail groove, a fastening bolt, a gauge rod clip, and a micrometer, which are used to tighten the head of the earring bolt to be measured for measurement.

[0011] Furthermore, in the fixing portion, the front push rod and the rear push rod have the same structure and are both threaded rods, which match the concentric threaded holes on the front and rear sides of the main support; the front ends of the front push rod and the rear push rod are provided with mounting blocks, the diameter of which is larger than the diameter of the front push rod and the rear push rod; a circular hole is provided in the middle of the stop baffle, the diameter of which is larger than the diameter of the front push rod and the rear push rod but smaller than the diameter of the mounting block; the stop baffle is sleeved on the front push rod and the rear push rod and rests on the mounting block at the front end of the push rod; the rear ends of the front push rod and the rear push rod are extended from the concentric threaded holes on the front and rear sides of the main support. The inner side is screwed in and installed outward; the front end face of the V-shaped iron is a V-shaped face, and the rear end face is a plane, and a circular hole is provided on the rear end face, which matches the diameter of the mounting stop at the front end of the front push rod and the rear push rod; the mounting stop at the front end of the front push rod and the rear push rod is embedded in the circular hole on the rear end face of the V-shaped iron; the stop baffle is fixedly connected to the V-shaped iron, and the V-shaped iron is movably installed on the front end of the front push rod and the rear push rod to ensure that the V-shaped iron can remain stationary when the front push rod and the rear push rod are rotated; the tightening handwheel is fixedly connected to the rear ends of the front push rod and the rear push rod, and is used to rotate and operate the front push rod and the rear push rod.

[0012] Furthermore, in the measuring part, the left and right push rods have the same structure, the rear ends of the push rods are cylindrical heads, and the front ends are straight rods with round cross-sections, which match the concentric holes on the left and right sides of the main support, and the front end faces of the push rods are provided with internal threaded holes; the left and right top plates have the same structure, the rear ends of the top plates are provided with screws, which match the internal threaded holes on the front end faces of the push rods, and the front ends of the top plates are circular disk surfaces; the front ends of the left and right push rods pass through the concentric holes on the left and right sides of the main support; the left top plate is fixedly installed on the front end of the left push rod by threads; the spring is sleeved on the front end of the right push rod; the right top plate is installed on the right The front end of the push rod clamps the spring between the main support and the right top plate; the dovetail groove is fixedly installed below the circular hole on the right side of the main support, and the dovetail slide rail is slidably installed in the dovetail groove; a threaded hole is provided at the bottom of the dovetail groove, and the fastening bolt is provided in the threaded hole, and by screwing in the fastening bolt, the dovetail slide rail can be pressed against the dovetail slide rail to fix the position of the dovetail slide rail; the front end of the dovetail slide rail is provided with a mounting recess matching the micrometer rod, and the micrometer is fixedly installed on the mounting recess at the front end of the dovetail slide rail in conjunction with the rod clip to ensure that when the dovetail slide rail is adjusted to the right, the measuring front end of the micrometer can press against the head of the right push rod.

[0013] Furthermore, a threaded hole is provided at the front end of the tightening handwheel, which matches the thread of the front push rod and the rear push rod; a circular hole is provided on the side of the front end of the tightening handwheel, and a threaded hole is provided on the rear end side of the front push rod and the rear end side of the front push rod, and the circular hole on the side of the front end of the tightening handwheel matches the threaded hole on the rear end side of the push rod; the tightening handwheel is screwed into the rear ends of the front push rod and the rear push rod through threads, and the circular hole on the side of the front end of the tightening handwheel is aligned with the threaded hole on the rear end side of the push rod, and then further tightened from the side by screws.

[0014] Furthermore, the components of the main support, the fixing part and the measuring part are made of 45 steel.

[0015] When using the above-mentioned measuring tool to measure the axial clearance of the earring bolt bearing, the operator rotates and tightens the hand wheel to screw in the front push rod and the rear push rod until the V-shaped iron fits the earring bolt rod to be measured; adjust the front push rod and the rear push rod so that the head of the earring bolt to be measured is in the middle position, and the axial direction of the earring bolt bearing to be measured is along the position of the left push rod and the right push rod, and then further rotate and tighten the hand wheel until the V-shaped iron clamps the earring bolt rod to be measured; after loosening the fastening bolt, adjust the dovetail slide rail until the measuring front end of the micrometer is against the head of the right push rod, and the right push rod is against the right side of the bearing of the head of the earring bolt to be measured through the right top plate, so that the micrometer has an initial value, tighten the fastening bolt, fix the position of the dovetail slide rail, and record the initial value of the micrometer; finally, press the left push rod to the right to stop, record the value of the micrometer at this time, and subtract the initial value, which is the axial clearance of the earring bolt bearing to be measured.

[0016] Beneficial Effects

[0017] The utility model provides a universal earring bolt bearing axial clearance measuring tool. By arranging a front push rod and a rear push rod in cooperation with a V-shaped iron, earring bolts to be measured of different specifications can be quickly clamped; by arranging a left push rod and a right push rod in cooperation with a micrometer, the axial clearance of earring bolts to be measured of different specifications can be stably measured; since the clamping is fast, stable and adjustable, compared with the existing manual measurement method, the utility model can greatly improve the measurement accuracy and measurement efficiency, and has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the front push rod assembly of an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the tightening hand wheel, front push rod and V-shaped iron structure of the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the left top rod and the left top plate of an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the assembly of the dovetail groove, dovetail slide rail and micrometer of the embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the dovetail groove and dovetail slide rail structure of an embodiment of the utility model;

[0024] In the figure: 1-main support; 2-left push rod; 21-pull rod head; 22-pull rod internal threaded hole; 3-left top plate; 31-pull plate screw; 32-top plate surface; 4-right push rod; 5-spring; 6-right top plate; 7-micrometer; 8-screw; 9-gauge rod clip; 10-dovetail slide rail; 101-micrometer rod mounting recess; 11-dovetail groove; 111-dovetail groove bottom threaded hole; 13-fastening bolt; 14-front push rod; 141-installation stop; 142-front push rod end threaded hole; 15-rear push rod; 16-V-shaped iron; 161-V-shaped iron rear end round hole; 17-stop baffle; 19-tightening handwheel; 191-tightening handwheel front end threaded hole; 192-tightening handwheel front end side round hole; 20-earring bolt to be tested. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0026] An embodiment of the present utility model is as follows Figure 1As shown, a universal earring bolt bearing axial clearance measuring tool comprises a main support 1, a fixing part and a measuring part;

[0027] The main support 1 is a square cavity structure with an open upper end; concentric circular holes are provided on the left and right sides of the main support 1 near the upper end, and concentric threaded holes are provided on the front and rear sides near the middle; the upper and lower ends of the front and rear sides of the main support 1 are hollowed out to facilitate taking and clamping the earring bolts 20 to be tested;

[0028] The fixing part is installed on the main support 1 through the concentric threaded holes on the front and rear sides of the main support 1, and includes a symmetrically arranged front push rod 14, a rear push rod 15, a V-shaped iron 16, a stop baffle 17, and a tightening hand wheel 19, which are used to fix and clamp the rod of the earring bolt 20 to be tested;

[0029] In this embodiment, in the fixing portion, the front push rod 14 and the rear push rod 15 have the same structure, both of which are threaded rods, matching the concentric threaded holes on the front and rear sides of the main support 1; Figure 2 , Figure 3 As shown, only the front push rod 14 is shown in the figure, and the front ends of the front push rod 14 and the rear push rod 15 are provided with a mounting stop 141, and the diameter of the mounting stop 141 is larger than the diameter of the front push rod 14 and the rear push rod 15; a circular hole is provided in the middle of the stop baffle 17, and the diameter of the circular hole is larger than the diameter of the front push rod 14 and the rear push rod 15 but smaller than the diameter of the mounting stop 141; the stop baffle 17 is sleeved on the front push rod 14 and the rear push rod 15, and rests on the mounting stop 141 at the front end of the push rod; the rear ends of the front push rod 14 and the rear push rod 15 are screwed outward from the inner sides of the concentric threaded holes on the front and rear sides of the main support 1 for installation; the front end face of the V-shaped iron 16 is a V-shaped surface, and the rear end face is a flat surface The rear end surface is provided with a circular hole 161, which matches the diameter of the mounting stop 141 at the front end of the front push rod 14 and the rear push rod 15; the mounting stop 141 at the front end of the front push rod 14 and the rear push rod 15 is embedded in the circular hole 161 at the rear end surface of the V-shaped iron 16; the stop baffle 17 is fixedly connected to the V-shaped iron 16 by screws 8, and the V-shaped iron 16 is movably mounted on the front end of the front push rod 14 and the rear push rod 15 to ensure that the V-shaped iron 16 can remain stationary when the front push rod 14 and the rear push rod 15 are rotated; the rear ends of the front push rod 14 and the rear push rod 15 are provided with a tightening hand wheel 19 for rotating the front push rod 14 and the rear push rod 15; in this embodiment, Figure 3As shown, a threaded hole 191 is provided at the front end of the tightening handwheel 19, which matches the thread of the front push rod 14 and the rear push rod 15; a circular hole 192 is provided on the side of the front end of the tightening handwheel 19, and a threaded hole 142 is provided on the side of the rear end of the front push rod 14 and the rear push rod 15, and the circular hole 192 on the side of the front end of the tightening handwheel 19 matches the threaded hole 142 on the side of the rear end of the push rod; the tightening handwheel 19 is screwed into the rear ends of the front push rod 14 and the rear push rod 15 through threads, and the circular hole 192 on the side of the front end of the tightening handwheel 19 is aligned with the threaded hole 142 on the side of the rear end of the push rod, and then further tightened from the side by screws 8.

[0030] The measuring part is installed on the main support 1 through the concentric holes on the left and right sides of the main support 1 and the right side surface, and includes a symmetrically arranged left top rod 2, a right top rod 4, a left top plate 3, and a right top plate 6, and also includes a spring 5, a dovetail slide rail 10, a dovetail groove 11, a fastening bolt 13, a gauge rod clip 9, and a micrometer 7, which are used to tighten the head of the earring bolt 20 to be measured for measurement;

[0031] In this embodiment, in the measuring part, the left push rod 2 and the right push rod 4 have the same structure. Figure 4 As shown, the figure only shows one side of the left push rod 2, the rear end of the push rod is a cylindrical head 21, and the front end is a straight rod with a circular cross-section, which matches the concentric holes on the left and right sides of the main support 1, and the front end surface of the push rod is provided with an internal threaded hole 22; the left top plate 3 and the right top plate 6 have the same structure, the rear end of the top plate is provided with a screw 31, which matches the internal threaded hole 22 on the front end surface of the push rod, and the front end of the top plate is a circular plate surface 32; the front ends of the left push rod 2 and the right push rod 4 pass through the concentric holes on the left and right sides of the main support 1; the left top plate 3 is fixedly installed on the front end of the left push rod 2 by threads; the spring 5 is sleeved on the front end of the right push rod 4; the right top plate 6 is installed on the front end of the right push rod 4 by threads, and the spring 5 is clamped between the main support 1 and the right top plate 6; Figure 1 and Figure 5 As shown, the dovetail groove 11 is fixedly installed below the right circular hole of the main support 1, and the dovetail slide rail 10 is slidably installed in the dovetail groove 11; a threaded hole 111 is provided at the bottom of the dovetail groove 11, and the fastening bolt 13 is provided in the threaded hole 111, and by screwing in the fastening bolt 13, the dovetail slide rail 10 can be pressed against and the position of the dovetail slide rail 10 is fixed; the front end of the dovetail slide rail 10 is provided with a mounting recess 101 matching the micrometer rod, and the micrometer 7 is fixedly installed on the mounting recess 101 at the front end of the dovetail slide rail 10 in cooperation with the rod clip 9 and the screw 8, to ensure that when the dovetail slide rail 10 is adjusted to the right, the measuring front end of the micrometer 7 can be pressed against the head of the right push rod 4.

[0032] In this embodiment, the main support 1, the fixing part and the measuring part are made of 45 steel.

[0033] When the above measuring tool is used to measure the bearing axial clearance of the earring bolt 20, as shown in FIG. Figure 1 As shown, the operator rotates and tightens the hand wheel 19, screws in the front push rod 14 and the rear push rod 15, until the V-shaped iron 16 fits the rod of the earring bolt 20 to be tested; adjusts the front push rod 14 and the rear push rod 15 so that the head of the earring bolt 20 to be tested is in the middle position, and the axial direction of the bearing of the earring bolt 20 to be tested is along the position of the left push rod 2 and the right push rod 4, and then further rotates and tightens the hand wheel 19 until the V-shaped iron 16 clamps the rod of the earring bolt 20 to be tested; after loosening the fastening bolt 13 , adjust the dovetail slide rail 10 until the measuring front end of the micrometer 7 is against the head of the right push rod 4, and the right push rod 4 is against the right side of the bearing of the head of the earring bolt 20 to be measured through the right top plate 6, so that the micrometer 7 has an initial value, tighten the fastening bolt 13, fix the position of the dovetail slide rail 10, and record the initial value of the micrometer 7; finally, press the left push rod 2 to the right until it stops, record the value of the micrometer 7 at this time, subtract the initial value, which is the axial clearance of the bearing of the earring bolt 20 to be measured.

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A universal earring bolt bearing axial clearance measuring tool, characterized by: It includes a main support, a fixing part and a measuring part; The main support is a square cavity structure with an open upper end; concentric circular holes are provided on the left and right sides of the main support near the upper end, and concentric threaded holes are provided on the front and rear sides near the middle; the upper and lower ends of the front and rear sides of the main support are hollowed out to facilitate the removal and clamping of the earring bolts to be tested; The fixing part is installed on the main support through the concentric threaded holes on the front and rear sides of the main support, and includes a symmetrically arranged front push rod, a rear push rod, a V-shaped iron, a stop baffle, and a tightening hand wheel, which are used to fix and clamp the rod of the earring bolt to be tested; The measuring part is installed on the main support through the concentric circular holes on the left and right sides of the main support and the right side surface, and includes a symmetrically arranged left top rod, a right top rod, a left top plate, and a right top plate, as well as a spring, a dovetail slide rail, a dovetail groove, a fastening bolt, a gauge rod clip, and a micrometer, which are used to tighten the head of the earring bolt to be measured for measurement.

2. According to claim 1, a universal earring bolt bearing axial clearance measuring tool is characterized by: In the fixing part, the front push rod and the rear push rod have the same structure and are both threaded rods, which match the concentric threaded holes on the front and rear sides of the main support; the front ends of the front push rod and the rear push rod are provided with mounting blocks, the diameter of which is larger than the diameter of the front push rod and the rear push rod; a circular hole is provided in the middle of the stop baffle, the diameter of which is larger than the diameter of the front push rod and the rear push rod but smaller than the diameter of the mounting block; the stop baffle is sleeved on the front push rod and the rear push rod, and rests on the mounting block at the front end of the push rod; the rear ends of the front push rod and the rear push rod extend from the inner sides of the concentric threaded holes on the front and rear sides of the main support to the External screw-in installation; the front end face of the V-shaped iron is a V-shaped face, and the rear end face is a plane, and a circular hole is provided on the rear end face, which matches the diameter of the mounting stop at the front end of the front push rod and the rear push rod; the mounting stop at the front end of the front push rod and the rear push rod is embedded in the circular hole on the rear end face of the V-shaped iron; the stop baffle is fixedly connected to the V-shaped iron, and the V-shaped iron is movably installed on the front end of the front push rod and the rear push rod to ensure that the V-shaped iron can remain stationary when the front push rod and the rear push rod are rotated; the tightening handwheel is fixedly connected to the rear ends of the front push rod and the rear push rod, and is used to rotate and operate the front push rod and the rear push rod.

3. A universal earring bolt bearing axial clearance measuring tool according to claim 1, characterized in that: In the measuring part, the left and right push rods have the same structure, the rear ends of the push rods are cylindrical heads, and the front ends are straight rods with round cross-sections, which match the concentric holes on the left and right sides of the main support, and the front end faces of the push rods are provided with internal threaded holes; the left and right top plates have the same structure, the rear ends of the top plates are provided with screws, which match the internal threaded holes on the front end faces of the push rods, and the front ends of the top plates are circular disk surfaces; the front ends of the left and right push rods pass through the concentric holes on the left and right sides of the main support; the left top plate is fixedly installed on the front end of the left push rod by threads; the spring is sleeved on the front end of the right push rod; the right top plate is installed on the front end of the right push rod by threads The spring is clamped at the end between the main support and the right top plate; the dovetail groove is fixedly installed below the circular hole on the right side of the main support, and the dovetail slide rail is slidably installed in the dovetail groove; a threaded hole is provided at the bottom of the dovetail groove, and the fastening bolt is provided in the threaded hole, and by screwing in the fastening bolt, the dovetail slide rail can be pressed against the dovetail slide rail to fix the position of the dovetail slide rail; the front end of the dovetail slide rail is provided with a mounting recess matching the micrometer rod, and the micrometer is fixedly installed on the mounting recess at the front end of the dovetail slide rail in conjunction with the dial rod clip, ensuring that when the dovetail slide rail is adjusted to the right, the measuring front end of the micrometer can press against the head of the right top rod.

4. A universal earring bolt bearing axial clearance measuring tool according to claim 2, characterized in that: A threaded hole is provided at the front end of the tightening handwheel, which matches the thread of the front push rod and the rear push rod; a circular hole is provided on the side of the front end of the tightening handwheel, and a threaded hole is provided on the rear end side of the front push rod and the rear push rod, and the circular hole on the side of the front end of the tightening handwheel matches the threaded hole on the rear end side of the push rod; the tightening handwheel is screwed into the rear ends of the front push rod and the rear push rod through threads, and the circular hole on the side of the front end of the tightening handwheel is aligned with the threaded hole on the side of the rear end of the push rod, and then further tightened from the side by screws.

5. According to claim 1, a universal earring bolt bearing axial clearance measuring tool is characterized by: The components of the main support, the fixing part and the measuring part are made of 45# steel.

Images