Radial clearance measuring device for radial bearing

Abstract

The application relates to the technical field of measurement, in particular to a radial gap measuring device for a centripetal bearing. The device comprises a base, a clamping mechanism, a sliding mechanism and a lever mechanism. The base is a structure with an inner cavity and an upper opening. A pair of side walls are provided with rotating shaft mounting holes. Another pair of side walls are provided with a bridge. The clamping mechanism comprises an inner ring clamping part arranged on the bridge and an outer ring clamping part arranged on the base. The inner ring clamping part is used for tightening the inner ring of the centripetal bearing, and the outer ring clamping part is used for tightening the outer ring of the centripetal bearing. The sliding mechanism comprises V-shaped guide rails, steel balls and a rack. The V-shaped guide rails are arranged on the upper ends of the pair of side walls of the base, and each V-shaped guide rail is provided with two steel balls. The upper ends of the steel balls abut against the lower end faces of the clamping mechanism. The centers of the lower end faces of the clamping mechanism are fixedly connected with the rack, and the rack is located in the cavity of the base.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and more specifically to a device for measuring the radial clearance of radial bearings. Background Technology

[0002] In the manufacturing process of aircraft mechanical control systems, bearing assembly is one of the important process procedures. Different bearings have different radial clearances. With the improvement of production quality, the requirements for the radial clearance of various radial bearings are also getting higher and higher.

[0003] With the increasing precision and miniaturization of modern measurement technology, coupled with strict assembly requirements, and the fact that assembly personnel need to classify the radial clearance of bearings in daily production, but the classification method is not rigorous enough, the clearance during the positioning of the inner ring of the bearing cannot be effectively eliminated, and the measurement error of the entire outer ring by dial indicator is large, which cannot meet the production needs; therefore, the improvement of the technology for measuring the radial clearance of radial bearings has become an important technical indicator. Summary of the Invention

[0004] This invention provides a radial clearance measuring device for radial bearings, which overcomes the above-mentioned problems and solves the problem of selecting and matching radial clearance of bearings in aircraft mechanical control systems.

[0005] This invention provides a radial clearance measuring device for radial bearings, comprising: a base, a clamping mechanism, a sliding mechanism, and a lever mechanism; wherein,

[0006] The base has an internal cavity and an opening at the top; a pair of side walls have pivot mounting holes; and a cable tray is installed across the other pair of side walls.

[0007] The clamping mechanism includes an inner ring clamping part disposed on the bridge frame and an outer ring clamping part disposed on the base. The inner ring clamping part is used to tighten the inner ring of the radial bearing, and the outer ring clamping part is used to tighten the outer ring of the radial bearing.

[0008] The sliding mechanism includes: V-shaped guide rails, steel balls, and a rack; the V-shaped guide rails are set on the upper ends of the opposite side walls of the base, and two steel balls are mounted on each V-shaped guide rail; the steel balls abut against the lower end face of the clamping mechanism; the center of the lower end face of the clamping mechanism is fixedly connected to the rack; the rack is located in the cavity of the base;

[0009] Leverage mechanisms include internal leverage and external leverage;

[0010] The internal lever includes: a rotating shaft, a bearing, and a gear; wherein, the rotating shafts are connected, the rotating shaft is mounted in one rotating shaft mounting hole through a connecting sleeve, the rotating shaft passes through two rotating shaft mounting holes, and is mounted in the rotating shaft mounting holes through the bearings at both ends; the gear is connected to the middle of the rotating shaft through a key, and the rack meshes with the gear;

[0011] The external lever includes a bracket and a weight; brackets are installed on both sides of the connecting sleeve, and the weight can be moved left and right via a slide rail connected to the bracket.

[0012] A dial indicator holder is installed on one side of the cable tray, and the dial indicator is clamped on the holder by a high-head set screw; the dial indicator pointer is close to the dial indicator.

[0013] Furthermore, the measuring device also includes: a positioning mechanism;

[0014] The positioning mechanism includes: bolt-action positioner, positioning pin, knurled handle, and pressure spring;

[0015] The base has a through hole on one side wall of the other pair of side walls. The bolt-action positioner is installed on the base through the through hole, and the positioning opening of the bolt-action positioner is directly opposite the gear. The knurled handle is fixed to the positioning pin. The positioning pin is inserted into the bolt-action positioner and presses against the positioning pin of the bolt-action positioner. A pressure spring is fitted on the inserted positioning pin. The knurled handle is used to control the positioning pin to extend out of the opening and insert between the teeth of the gear.

[0016] Furthermore, the inner ring clamping part includes: a positioning shaft, a tension spring, a pressure sleeve, and a star nut;

[0017] The cable tray is connected to a positioning shaft, and a tension spring, a pressure sleeve, and a star nut are mounted on the positioning shaft from bottom to top.

[0018] Furthermore, the outer clamping part includes: a sliding plate, an adjusting support, a V-shaped clamp, a positioning block, a screw, and a knurled cylindrical head nut;

[0019] The slide is located below the bridge frame, and a groove for accommodating the steel ball is also cut on the lower end of the slide at the position corresponding to the steel ball. A positioning block is connected in the middle of the slide, and the positioning block positions the screw. A slide rail is set above the slide rail, and the adjusting support cooperates with the slide rail. Both ends of the screw pass through the adjusting support, and a knurled cylindrical head nut is set at one end of the screw to allow rotation of the knurled cylindrical head nut to make the two adjusting supports move inward or outward at the same time. A V-clamp is set at the top of the adjusting support, and the V-clamp is used to tighten the outer ring of the radial bearing.

[0020] Furthermore, two adjusting supports are mounted on the slide plate via dovetail grooves, which serve as slideways. The V-shaped clamps are positioned on the adjusting supports by two diamond pins and two cylindrical pins.

[0021] Furthermore, the screw is split to the left and right with the positioning block as the center point, and an adjustment support is installed on the left side of the screw and another adjustment support is installed on the right side of the screw.

[0022] Furthermore, the axis of the screw driving the adjusting support to move in opposite directions is perpendicular to the direction of the sliding plate.

[0023] Furthermore, the rotating shaft, bearing, and gear have good coaxiality.

[0024] Beneficial effects:

[0025] 1. With clamping and sliding mechanisms as the main components, and positioning and lever mechanisms as the auxiliary components, the radial clearance of radial bearings can be effectively measured. The device is highly responsive, avoids positioning errors of the bearing itself during the measurement process, and is easy to operate, enabling the measurement of bearings of different sizes.

[0026] 2. The device is inexpensive to manufacture and can be used in large, medium and small enterprises.

[0027] 3. This device positions the inner and outer rings of the bearing separately, ensuring accurate and reliable positioning.

[0028] 4. This device, through the interlocking of the lever mechanism and the positioning mechanism, can effectively measure the movement of the outer ring of the bearing, avoiding other measurement errors. Attached Figure Description

[0029] Figure 1 This is a front view of the radial clearance measuring device for radial bearings according to the present invention;

[0030] Figure 2 This is a planed view of the radial clearance measuring device AA for radial bearings of the present invention;

[0031] Figure 3 This is a top view of the radial clearance measuring device for radial bearings according to the present invention;

[0032] Figure 4 This is an exploded view of the positioning mechanism of the radial clearance measuring device for radial bearings of the present invention;

[0033] Figure 5 This is an exploded view of the clamping mechanism of the radial clearance measuring device for radial bearings of the present invention;

[0034] Figure 6 This is an exploded view of the sliding mechanism of the radial clearance measuring device for radial bearings of the present invention;

[0035] Figure 7 This is an exploded view of the lever mechanism of the radial clearance measuring device for radial bearings of the present invention;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1—Rotating shaft; 2—Cylindrical pin; 3—Connecting sleeve; 4—Pan head screw; 5—Key; 6—Gear; 7—Rack; 8—Cylindrical pin; 9—Pan head screw; 10—Cover plate; 11—Base; 12—Bearing; 13—Rotating shaft; 14—Steel ball; 15—Baffle; 16—Slide plate; 17—Knurled cylindrical head nut; 18—Cylindrical pin; 19—Screw; 20—Locking block; 21—Pan head screw; 22—Cylindrical pin; 23—Star nut; 24—Locking Shaft; 25—Pressure sleeve; 26—Tension spring; 27—Adjusting support; 28—Slide rail; 29—High-head set screw; 30—Bracket; 31—Knurled handle; 32—Bullet-type positioner; 33—Cylindrical pin; 34—Positioning pin; 35—Pressure spring; 36—Counterhead screw; 37—Weight; 38—V-bolt; 39—Rhombus pin; 40—Cylindrical pin; 41—Hex socket head cap screw; 42—Cable tray; 43—Cylindrical pin; 44—Dial indicator. Detailed Implementation

[0038] To make the invention's solutions and advantages clear and specific, the embodiments of the invention will be described in full and in detail below with reference to the accompanying drawings.

[0039] It should be noted that the "connection" mentioned in the embodiments of the present invention can be a screw connection, a cylindrical pin connection, or a screw and cylindrical pin connection. Engineering technicians can understand it according to the actual connection situation.

[0040] This invention provides a radial clearance measuring device for radial bearings, such as... Figure 1-7 As shown, it includes: a clamping mechanism, a sliding mechanism, a positioning mechanism, and a lever mechanism; wherein,

[0041] The clamping mechanism includes: knurled cylindrical head nut 17, cylindrical pin 18, screw 19, positioning block 20, pan head screw 21, cylindrical pin 22, star nut 23, positioning shaft 24, pressure sleeve 25, tension spring 26, adjusting support 27, high head set screw 29, V-clamp 38, diamond pin 39, cylindrical pin 40, hex socket head cap screw 41, cable tray 42, cylindrical pin 43, dial indicator 44.

[0042] The sliding mechanism includes: rack 7, cylindrical pin 8, pan head screw 9, steel ball 14, baffle 15, and slide plate 16.

[0043] The positioning mechanism includes: knurled handle 31, bolt-type positioner 32, cylindrical pin 33, positioning pin 34, and pressure spring 35.

[0044] The lever mechanism includes: a rotating shaft 1, a cylindrical pin 2, a connecting sleeve 3, a pan head screw 4, a key 5, a gear 6, a cover plate 10, a base 11, a bearing 12, a rotating shaft 13, a slide rail 28, a bracket 30, and a weight 37.

[0045] As an improvement: the screw 19 is separated to the left and right by the positioning block 20, the left thread is left-handed and the right thread is right-handed, and one end of the screw 19 is equipped with a stepped nut 17.

[0046] As an improvement: the sliding mechanism allows the steel ball 14 to roll between the V-shaped track of the slide plate 16 and the V-shaped track of the base 11, resulting in sensitive response, stable operation, and excellent guiding accuracy.

[0047] As an improvement: the weight 37 of the lever mechanism moves left and right on the slide rail 28 to apply torque, which is converted into torque on the rotating shaft 13, and finally amplified by the gear 6 connected to the rotating shaft 13.

[0048] Combinator Figure 1-7 The radial clearance measuring device for the radial bearing includes: a clamping mechanism, a sliding mechanism, a positioning mechanism, and a lever mechanism.

[0049] The base 11 is a stepped cubic cavity, and the cover plate 10 is connected to the bottom by countersunk screws 36.

[0050] The clamping mechanism includes an inner clamping part and an outer clamping part. The inner clamping part includes a bridge frame 42 connected to the base 11. A dial indicator frame is provided on one side of the bridge frame 42. The dial indicator 44 is clamped on the dial indicator frame by a high-head set screw 29. At the same time, a positioning shaft 24 is connected to the bridge frame 42. A tension spring 26, a pressure sleeve 25, and a star nut 23 are installed on the positioning shaft 24. The outer clamping part includes two adjusting supports 27 mounted on the slide plate 16 through dovetail grooves. Two diamond pins 39 and two cylindrical pins 40 are used to position V-shaped clamps 38 on the adjusting supports 27.

[0051] Furthermore, a positioning block 20 is connected to the middle of the slide plate 16 by two pan head screws 21 and two cylindrical pins 22. The screw 19 is separated to the left and right with the positioning block 20 as the midpoint. An adjustment support 27 is installed on the left side of the screw, and another adjustment support 27 is installed on the right side of the screw.

[0052] The sliding mechanism includes two steel balls 14 mounted on V-shaped guide rails on both sides of the base 11. The steel balls 14 support the slide plate 16, and the rack 7 is connected to the slide plate 16 by two cylindrical pins 8 and two pan head screws 9. Baffles 15 are installed at the ends of the V-shaped guide rails on both sides of the slide plate 16 to prevent the steel balls 14 from slipping off.

[0053] The positioning mechanism includes a bolt-action positioner 32 connected to one side of the base 11. The bolt-action positioner 32 is positioned by a cylindrical pin 33, which positions the positioning pin and the knurled handle 31 of the positioning pin and the knurled handle 34. The positioning pin and the knurled handle 34 are equipped with a pressure spring 35.

[0054] The lever mechanism includes an internal lever and an external lever. The internal lever connects the rotating shaft 11 and the rotating shaft 13 simultaneously via a cylindrical pin 2. Bearings 12 are installed at both ends of the rotating shaft 13, and a gear 6 is connected to the middle of the rotating shaft 13 via a key 5. The rotating shaft 1, the rotating shaft 13, the bearings 12, and the gear 6 have good coaxiality.

[0055] Further external levers include connecting sleeve 3 to one side of base 11 via 6 pan head screws 4, rotating shaft 1 rotating inside connecting sleeve 3, brackets 30 mounted on both sides of connecting sleeve 3, and weight 37 being able to be moved left and right via slide rail 28 connected to bracket 30.

[0056] The specific implementation of this invention is as follows: First, twist the knurled handle 31 to drive the positioning pin 34 to press the positioning pin 34 into the teeth of the gear 6 under the action of the pressure spring 35 to prevent the slide plate 16 from sliding. As mentioned above, the gear 6 drives the rack 7, and the rack 7 is connected to the slide plate 16. At this time, the inner ring of the bearing is clamped first. The inner ring of the bearing is placed on the tension spring 26 on the positioning shaft 24. The pressure sleeve 25 is pressed into the tension spring 26 by tightening the star nut 23 to clamp the inner ring of the bearing. The tension spring 26 here can be selected according to different sizes of the inner ring of the bearing.

[0057] Then, the outer ring of the bearing is clamped by rotating the knurled cylindrical head nut 17 to rotate the screw 19. The screw 19 drives the adjusting support 27 to move in opposite directions, and at the same time, the V-clamp clamps the outer ring of the bearing. It should be noted that the axis of the screw 19 driving the adjusting support 27 to move in opposite directions is perpendicular to the sliding direction of the slide plate 16. Then, the dial indicator 44 mounted on the bridge 42 is zeroed. Next, the weight 37 is moved to one end of the slide rail 28, and the knurled handle 31 is rotated outward to pull the positioning pin 34 out of the gear 6, while recording the dial indicator data. Then, the weight 37 is moved to the other end of the slide rail 28, and the dial indicator data is recorded again. In this way, the radial clearance of the radial bearing can be measured by one round-trip cycle.

Claims

1. A radial clearance measuring device for a radial bearing, characterized in that, include: Base (11), clamping mechanism, sliding mechanism, lever mechanism; among which, The base (11) has an inner cavity and an opening at the top; a pair of side walls are provided with shaft mounting holes; a bridge (42) is provided across the other pair of side walls; The clamping mechanism includes an inner ring clamping part disposed on the bridge frame (42) and an outer ring clamping part disposed on the base (11). The inner ring clamping part is used to tighten the inner ring of the radial bearing, and the outer ring clamping part is used to clamp the outer ring of the radial bearing. The sliding mechanism includes: a V-shaped guide rail, steel balls (14) and a rack (7); the V-shaped guide rail is set on the upper side wall of the base (11), and two steel balls (14) are mounted on each V-shaped guide rail; the steel balls are pressed against the lower end face of the clamping mechanism; the center of the lower end face of the clamping mechanism is fixedly connected to the rack; the rack is located in the cavity of the base (11); Leverage mechanisms include internal leverage and external leverage; The internal lever includes: a rotating shaft (1), a rotating shaft (13), a bearing (12), and a gear (6); wherein, the rotating shaft (1) and the rotating shaft (13) are connected, the rotating shaft (1) is installed in a rotating shaft mounting hole through a connecting sleeve, the rotating shaft passes through two rotating shaft mounting holes, and is installed in the rotating shaft mounting holes through the bearings at both ends; the gear (6) is connected in the middle of the rotating shaft (13) through a key (5), and the rack (7) meshes with the gear (6); The external lever includes a bracket (30) and a weight (37); the connecting sleeve (3) is equipped with brackets (30) on both sides, and the weight (37) can be moved left and right by a slide rail (28) connected to the bracket (30); A dial indicator holder is provided on one side of the cable tray (42), and the dial indicator (44) is clamped on the holder by a high-head set screw (29); the pointer of the dial indicator (44) is close to the dial indicator (44); The measuring device further includes: a positioning mechanism; The positioning mechanism includes: a bolt-action positioning device (32), a positioning pin (34), a knurled handle (31), and a pressure spring (35); The base (11) has a through hole on one of the other two side walls. The bolt-action locator (32) is installed on the base (11) through the through hole. The locating opening of the bolt-action locator (32) is directly opposite the gear (6). The knurled handle (31) is fixed to the locating pin (34). The locating pin is inserted into the bolt-action locator (32) and presses against the locating pin of the bolt-action locator (32). A pressure spring (35) is fitted on the inserted locating pin. The knurled handle (31) is used to control the locating pin to extend from the opening and insert between the teeth of the gear.

2. The measuring device according to claim 1, characterized in that, The inner ring clamping part includes: a positioning shaft (24), a tension spring (26), a pressure sleeve (25), and a star nut (23); The cable tray (42) is connected to a positioning shaft (24), and a tension spring (26), a pressure sleeve (25), and a star nut (23) are mounted on the positioning shaft (24) from bottom to top.

3. The measuring device according to claim 2, characterized in that, The outer clamping part includes: a sliding plate (16), an adjusting support (27), a V-shaped clamp (38), a positioning block (20), a screw (19), and a knurled cylindrical head nut (17); The slide plate (16) is located below the bridge frame (42). The lower end of the slide plate (16) also has a groove for accommodating the steel ball at the position corresponding to the steel ball. The middle of the slide plate (16) is connected to the positioning block (20), which positions the screw (19). A slide rail is provided above the slide plate. The adjusting support (27) cooperates with the slide rail. Both ends of the screw pass through the adjusting support (27). One end of the screw is provided with a knurled cylindrical head nut (17) that is compatible with rotation, so that the knurled cylindrical head nut (17) can be rotated to make the two adjusting supports move inward or outward at the same time. A V-clamp (38) is provided at the top of the adjusting support. The V-clamp (38) is used to clamp the outer ring of the radial bearing.

4. The measuring device according to claim 3, characterized in that, Two adjusting supports (27) are mounted on the slide plate (16) via dovetail grooves. The dovetail grooves serve as slideways. The V-shaped clamps (38) are positioned on the adjusting supports (27) by two diamond pins (39) and two cylindrical pins (40).

5. The measuring device according to claim 4, characterized in that, The screw (19) is separated to the left and right with the positioning block (20) as the midpoint, and an adjustment support (27) is installed on the left side of the screw and another adjustment support (27) is installed on the right side of the screw.

6. The measuring device according to claim 3, characterized in that, The axis of the screw (19) that drives the adjusting support (27) to move in opposite directions is perpendicular to the direction of the sliding plate (16).

7. The measuring device according to claim 3, characterized in that, The rotating shaft (1), rotating shaft (13), bearing (12), and gear (6) have good coaxiality.

Images