Bearing Radial Clearance Adjustment Tooling for Deep Cavity and Narrow Space

Abstract

The present invention discloses a tooling for adjusting the radial clearance of a bearing in a deep cavity and narrow space, which includes a first clamping arm and a second clamping arm hinged in an X shape. A clamping jaw opening driving mechanism is provided between the upper parts of the first clamping arm and the second clamping arm. The lower ends of the first clamping arm and the second clamping arm abut against the outer end face of the bearing and the adjacent fixed part on the shaft as the clamping jaw opens. The middle parts of the first clamping arm and the second clamping arm cross each other and are hinged to each other through a clamping arm shaft. The lower parts of the first clamping arm and the second clamping arm are the lower half rings of the first clamping arm and the second clamping arm with openings facing downwards. The outer sides of the two free ends at the lower parts of the lower half rings of the first clamping arm and the second clamping arm are respectively hinged with arc-shaped blocks of the first clamping arm and the second clamping arm. The concave parts of the two arc-shaped blocks of the first clamping arm and the second clamping arm face each other and match the shapes on both sides of the outer end face of the bearing. The axes of the lower half ring of the first clamping arm and the lower half ring of the second clamping arm are both perpendicular to the axis of the clamping arm shaft. This tooling can easily adjust the radial clearance of the bearing in a limited space, avoid harmful actions such as hammering, and extend the service life of the bearing.

Description

Technical Field

[0001] The present invention relates to a special maintenance tool for oil and water wells, and particularly to a radial clearance adjustment tooling for bearings in deep and narrow spaces, belonging to the technical field of oilfield pipeline anti-corrosion. Background Art

[0002] Bearings are extremely important components in mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. According to the different friction properties of the moving elements, bearings can be divided into two major categories: rolling bearings and sliding bearings. A rolling bearing generally consists of four parts: an outer ring, an inner ring, rolling elements, and a cage.

[0003] The gap between the rolling elements of the bearing and the inner and outer ring housings of the bearing is called the bearing clearance, which refers to the amount of movement when one of the inner or outer rings of the bearing is fixed and the unfixed side of the bearing clearance is moved radially or axially when the bearing is not installed on the shaft or bearing housing. According to the moving direction, it can be divided into radial clearance and axial clearance. Many mechanical products have relatively high requirements for the radial clearance of bearings: too small radial clearance will increase the friction torque of the bearing, easily cause the bearing to heat up and generate wear, cementation, and cracking of the inner and outer rings of the bearing, etc., which will cause bearing damage; too large radial clearance will cause the transmission mechanism to vibrate greatly during operation, and further reduce the service life of the bearing. In addition, too small and too large clearances will both generate relatively large noises and have a greater impact on the environment.

[0004] To adjust the radial clearance of the bearing, usually the mounting hole of the bearing seat is provided with a taper with a large outer diameter and a small inner diameter. The closer the bearing is to the inside, the greater the extrusion force on the outer ring of the bearing, so as to achieve the effect of reducing the radial clearance.

[0005] During the equipment assembly process, for the adjustment of the radial clearance, usually methods such as hammering or using a wrench to tighten the lock nut are adopted. For large machinery, the diameter and load of the rotating shaft are relatively large, and the supporting bearing specifications are also relatively large. There is no supporting lock nut for large bearings. The distance between the bearing seat and the adjacent fixed parts on the shaft of many equipment is very small, and only a narrow window can be set on the upper part of the equipment housing. During assembly, an aluminum rod or a copper rod is inserted into the deep cavity from the window. The lower end of the aluminum rod abuts against the outer end face of the bearing, and the upper end of the aluminum rod is hammered to adjust the bearing clearance. The above methods for adjusting the bearing clearance have the following problems:

[0006] 1. Hammering with a hammer will cause direct damage to the bearing surface, and may also bring in metal debris, etc., greatly affecting the service life of the bearing, and it is difficult to control the adjustment amount;

[0007] 2. If a lock nut is used, the lock nut directly becomes a part of the transmission mechanism and is non-removable, increasing the volume and weight of the transmission part; and using this method, the lock nut becomes a considerable part of the cost that cannot be ignored;

[0008] 3. In a narrow space within a deep cavity, there are problems with difficult operations when using a hammer to strike or a wrench to turn, resulting in a large workload, consuming a great deal of time and energy, and often with unsatisfactory results. Summary of the Invention

[0009] The purpose of the present invention is to overcome the problems existing in the prior art and provide a radial clearance adjusting tooling for bearings in a narrow space of a deep cavity, which can easily adjust the radial clearance of the bearing within a limited space, avoid harmful actions such as hammering, and extend the service life of the bearing.

[0010] To solve the above technical problems, a radial clearance adjusting tooling for bearings in a narrow space of a deep cavity according to the present invention includes a first pliers arm and a second pliers arm hinged in an X shape. There is a jaw opening driving mechanism between the upper parts of the first pliers arm and the second pliers arm. The lower ends of the first pliers arm and the second pliers arm abut between the outer end face of the bearing and the adjacent fixed part on the shaft as the jaws open.

[0011] As an improvement of the present invention, the middle parts of the first pliers arm and the second pliers arm intersect with each other and are hinged to each other through a pliers arm shaft. The lower part of the first pliers arm is a lower half ring of the first pliers arm with an opening downward. On the outer sides of the two free ends of the lower part of the lower half ring of the first pliers arm, there are respectively hinged first pliers arm arc-shaped blocks. The concave parts of the two first pliers arm arc-shaped blocks face each other and match the shapes on both sides of the outer end face of the bearing.

[0012] The lower part of the second pliers arm is a lower half ring of the second pliers arm with an opening downward. On the outer sides of the two free ends of the lower part of the lower half ring of the second pliers arm, there are respectively hinged second pliers arm arc-shaped blocks. The concave parts of the two second pliers arm arc-shaped blocks face each other and match the shapes on both sides of the outer end face of the bearing.

[0013] As a further improvement of the present invention, the axes of the lower half ring of the first pliers arm and the lower half ring of the second pliers arm are both perpendicular to the axis of the pliers arm shaft.

[0014] As a further improvement of the present invention, the lower half ring of the first pliers arm and the two first pliers arm arc-shaped blocks are coaxial, and the lower half ring of the second pliers arm and the two second pliers arm arc-shaped blocks are coaxial.

[0015] As a further improvement of the present invention, in the initial state, the lower half ring of the first pliers arm and the lower half ring of the second pliers arm are parallel to each other and abut against each other, and the upper half ring of the first pliers arm and the upper half ring of the second pliers arm are parallel to each other and spaced apart.

[0016] As a further improvement of the present invention, the upper part of the first pliers arm is an upper half ring of the first pliers arm with an opening upward, and the upper part of the second pliers arm is an upper half ring of the second pliers arm with an opening upward. There is a semi-circular push plate between the upper half ring of the first pliers arm and the upper half ring of the second pliers arm. The semi-circular push plate is connected to the inner end face of the upper half ring of the first pliers arm. The jaw opening driving mechanism pushes the semi-circular push plate to realize the opening of the upper jaws.

[0017] As a further improvement of the present invention, the jaw opening driving mechanism includes a U-shaped support and a hydraulic cylinder. The axis of the U-shaped support is perpendicular to the axis of the upper half ring of the second jaw arm, and the axis of the hydraulic cylinder is parallel to the axis of the upper half ring of the second jaw arm;

[0018] Both ends of the U-shaped support are respectively provided with support jaws extending vertically downward. The support jaws are correspondingly fixed on the outer sides of both ends of the upper half ring of the second jaw arm. The cylinder body of the hydraulic cylinder is fixed in the central hole of the U-shaped support, and the free end of the piston rod of the hydraulic cylinder is hinged to the upper part of the semi-circular push plate.

[0019] As a further improvement of the present invention, the opposite end faces of the two support jaws are symmetrically provided with vertically downward-opening support vertical grooves; the outer arc surface inside the upper half ring of the second jaw arm is symmetrically provided with vertical cutting grooves, and the uncut part forms a tenon on the upper half ring of the second jaw arm. The two tenons on the upper half ring of the second jaw arm are correspondingly inserted into the support vertical grooves.

[0020] As a further improvement of the present invention, the support jaw and the upper half ring of the second jaw arm are mutually positioned and fixed in the height direction by a safety spring.

[0021] As a further improvement of the present invention, the upper side walls of the two support vertical grooves are provided with support horizontal grooves, and the upper parts of the outer end faces of the upper half ring of the second jaw arm are symmetrically provided with horizontal grooves on the upper half ring of the second jaw arm; after the support jaw is inserted in place on the upper half ring of the second jaw arm, the horizontal groove on the upper half ring of the second jaw arm is flush with the support horizontal groove in the height direction and is mutually positioned by the safety spring.

[0022] As a further improvement of the present invention, the safety spring includes a semi-circular arc section with an upward opening. Both ends of the semi-circular arc section are respectively provided with safety spring inserts parallel to the axis of the upper half ring of the second jaw arm. The two safety spring inserts protrude radially outward from the semi-circular arc section and are correspondingly inserted into the support horizontal grooves. The two safety spring inserts protrude axially inward from the semi-circular arc section and are correspondingly inserted into the horizontal grooves on the upper half ring of the second jaw arm.

[0023] As a further improvement of the present invention, the free end of the piston rod of the hydraulic cylinder is inserted and fixed in a connecting shaft, and the free end of the connecting shaft is T-shaped and connected with a radial hinge sleeve;

[0024] The upper center of the semi-circular push plate is provided with two parallel push plate support ears. The radial hinge sleeve is located between the two push plate support ears and is coaxial. A push plate pin is commonly inserted into the central holes of the radial hinge sleeve and the two push plate support ears. One end of the push plate pin is provided with a push plate pin cap, and the push plate pin cap abuts against the outside of one push plate support ear;

[0025] A through push plate pin center hole is provided along the axis of the push plate pin. A push plate pin core shaft is inserted into the push plate pin center hole. One end of the push plate pin core shaft is provided with a core shaft mushroom head, and the core shaft mushroom head abuts against the outer side of another push plate ear. The other end of the push plate pin core shaft is screwed with a core shaft lock nut, and the core shaft lock nut presses on the center of the outer end face of the push plate pin cap.

[0026] As a further improvement of the present invention, clamping arm half-ring grooves are symmetrically provided at the inner end faces of the upper ends of both sides of the upper half-ring of clamping arm one. Semi-circular push plate bosses are symmetrically provided at the upper part of the semi-circular push plate, and the two semi-circular push plate bosses are correspondingly embedded in the clamping arm half-ring grooves.

[0027] As a further improvement of the present invention, the lower part of the semi-circular push plate is connected to the lower part of the upper half-ring of clamping arm one through a movable locking pin;

[0028] A clamping arm half-ring counterbore is provided at the center of the lower part of the inner end face of the upper half-ring of clamping arm one. An enlarged clamping arm half-ring threaded hole is provided at the outer port of the clamping arm half-ring counterbore. The inner end of the movable locking pin is inserted into the clamping arm half-ring counterbore and is screwed with a locking pin nut. A stop plug is screwed in the clamping arm half-ring threaded hole. The middle cylindrical section of the movable locking pin passes through the center hole of the stop plug;

[0029] A locking pin diamond head is provided at the outer end of the movable locking pin. A push plate diamond through hole that is matched with and allows the locking pin diamond head to pass through is provided at the center of the lower part of the semi-circular push plate;

[0030] When the locking pin diamond head retracts into the push plate diamond through hole, the locking pin nut is located at the bottom of the clamping arm half-ring counterbore, and the semi-circular push plate is disengaged from the locking with the upper half-ring of clamping arm one;

[0031] When the locking pin diamond head presses on the outer end face of the semi-circular push plate and the long axis of the locking pin diamond head is parallel to the short axis of the push plate diamond through hole, the locking pin nut abuts against the inner end face of the stop plug, and the semi-circular push plate is locked.

[0032] As a further improvement of the present invention, a diamond counterbore that is matched with the locking pin diamond head is provided at the outer port of the center hole of the stop plug. When half of the locking pin diamond head is embedded in the diamond counterbore, the stop plug can be rotated to screw it tightly in the clamping arm half-ring threaded hole.

[0033] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. Through hydraulic transmission, it is very convenient to adjust the radial clearance of the bearing in a deep cavity and narrow space, saving a large amount of time and energy compared with traditional manual operation.

[0034] 2. After using this tooling, locking nuts are not required for the bearings in deep cavity and narrow spaces, saving manufacturing costs.

[0035] 3. Compared with the hammering method, this tooling will not affect the service life of the bearing and the shaft. Especially for large bearings, it can greatly save the maintenance cost caused by bearing replacement.

[0036] 4. The locking force of the bearing is indirectly controlled by hydraulic pressure, with an accuracy similar to that of the locking nut and much higher than that of the hammering method. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments. The drawings are only provided for reference and illustration, and are not intended to limit the present invention.

[0038] Figure 1 This is the front view of the radial clearance adjustment tooling for bearings in a deep cavity and narrow space of the present invention;

[0039] Figure 2 is Figure 1 the left view of

[0040] Figure 3 is Figure 1 the top view of

[0041] Figure 4 is Figure 1 the three-dimensional Figure 1 ;

[0042] Figure 5 is Figure 1 the three-dimensional Figure 2 ;

[0043] Figure 6 is Figure 1 the three-dimensional exploded view of Figure 1 ;

[0044] Figure 7 is Figure 1 the three-dimensional exploded view of Figure 2 ;

[0045] Figure 8 is Figure 3 the sectional view along A-A in

[0046] In the figure: 1. First clamping arm; 1a. Upper half ring of the first clamping arm; 1a1. Embedding groove of the upper half ring of the first clamping arm; 1a2. Counterbore of the upper half ring of the first clamping arm; 1a3. Threaded hole of the upper half ring of the first clamping arm; 1b. Lower half ring of the first clamping arm; 1c. Arc-shaped dial of the first clamping arm; 1c1. Concave arc groove of the dial.

[0047] 2. Second clamping arm; 2a. Upper half ring of the second clamping arm; 2a1. Vertical cutting groove; 2a2. Tenon of the upper half ring of the second clamping arm; 2a3. Transverse groove of the upper half ring of the second clamping arm; 2b. Lower half ring of the second clamping arm; 2c. Arc-shaped dial of the second clamping arm; 2c1. Concave arc groove of the dial.

[0048] 3. Clamping arm shaft; 3a. Clamping arm mandrel;

[0049] 4. Semi-circular push plate; 4a. Push plate support ear; 4b. Semi-circular push plate boss; 4c. Rhombic through hole in push plate; 4d. Push plate pin; 4d1. Push plate pin cap; 4e. Push plate pin mandrel; 4e1. Mushroom head of mandrel; 4e2. Lock nut of mandrel;

[0050] 5. U-shaped support; 5a. Support clamp; 5b. Vertical groove in support; 5c. Horizontal groove in support; 5d. One-word countersunk groove in support; 5e. Downhill surface of central hole in support; 5f. Uphill surface of central hole in support;

[0051] 6. Safety spring; 6a. Safety spring insert block; 7. Hydraulic cylinder; 7a. Piston rod; 7b. Hydraulic cylinder support ear; 8. Connecting shaft; 8a. Radial hinge sleeve; 9. Movable locking pin; 9a. Rhombic head of locking pin; 10. Locking pin nut; 11. Stop plug. Detailed implementation mode

[0052] In the following description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating that the device must have a specific orientation.

[0053] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0055] As Figures 1 to 8 shown, the deep cavity and narrow space bearing radial clearance adjusting tooling of the present invention includes a clamping arm one 1 and a clamping arm two 2 hinged in an X shape. A jaw opening driving mechanism is provided between the upper parts of the clamping arm one 1 and the clamping arm two 2. The lower ends of the clamping arm one 1 and the clamping arm two 2 abut against the outer end face of the bearing and the adjacent fixed part on the shaft as the jaws open.

[0056] For a bearing located in the inner cavity of a device housing, if the spacing between the bearing and the adjacent fixed part on the shaft is very small, only a window is opened in the upper part of the device housing for adjusting the bearing clearance. After a tool such as a wrench is inserted, there is no space for rotation. The traditional method is only to insert an aluminum rod or a copper rod to abut against the inner ring of the bearing, and adjust the position of the bearing by hammering the outer end of the aluminum rod or the copper rod. Since the angle between the aluminum rod or the copper rod and the center line of the shaft is too large, the horizontal component force generated by hammering is very small, and it is difficult to achieve the purpose of adjusting the radial clearance of the bearing; most of the force acts on the shaft, and it is easy to gnaw out steps or burrs on the shaft. When hammering, metal debris is easily generated on the aluminum rod, the copper rod or the bearing and flies into the bearing raceway, seriously affecting the bearing life. Or due to the jumping of the aluminum rod or the copper rod or the too thick end, the cage of the bearing rolling element is directly damaged, resulting in the need to replace the bearing before the assembly is completed.

[0057] By using the radial clearance adjusting tooling for bearings in deep cavities and narrow spaces of the present invention, the work of adjusting the bearing clearance can be greatly simplified. The lower ends of the first clamping arm 1 and the second clamping arm 2 are inserted from the upper window of the device housing and placed between the bearing and the adjacent fixed part on the shaft. The upper clamping jaws of the first clamping arm 1 and the second clamping arm 2 are opened through the clamping jaw opening driving mechanism, and the lower clamping jaws of the first clamping arm 1 and the second clamping arm 2 are also opened synchronously and respectively abut between the opposite end faces of the bearing and the adjacent fixed part on the shaft. Since the adjacent fixed part on the shaft has been fixed and cannot move, the tension of the clamping jaws will push the bearing to translate axially, so as to achieve the purpose of adjusting the clearance.

[0058] Taking a horizontal shaft as an example, the tension of the lower clamping jaw of this tooling is almost along the horizontal direction. By horizontally extruding the bearing into the tapered hole of the bearing seat, the adjustment of the radial clearance of the bearing is realized without damaging the bearing or the shaft.

[0059] The middle parts of the first clamping arm 1 and the second clamping arm 2 cross each other and are hinged to each other through a clamping arm shaft 3. The clamping arm shaft 3 passes through the coaxial pin holes in the middle parts of the first clamping arm 1 and the second clamping arm 2. One end of the clamping arm shaft 3 is provided with a T-shaped head, and a clamping arm core shaft 3a is inserted along the central hole of the clamping arm shaft 3 at the other end of the clamping arm shaft 3. The end of the clamping arm core shaft 3a is provided with a mushroom head, and the other end of the clamping arm core shaft 3a passes through the central hole of the T-shaped head of the clamping arm shaft and is fixed by screwing a nut, so as to realize the axial fixation of the middle parts of the first clamping arm 1 and the second clamping arm 2 and allow them to rotate relative to each other.

[0060] The lower part of the first clamping arm 1 is a lower half ring 1b of the first clamping arm with an opening downward. The axis of the lower half ring 1b of the first clamping arm is perpendicular to the axis of the clamping arm shaft 3. The outer sides of the two free ends at the lower part of the lower half ring 1b of the first clamping arm are respectively hinged with an arc-shaped block 1c of the first clamping arm. The concave parts of the two arc-shaped blocks 1c of the first clamping arm face each other and match the shapes on both sides of the outer end face of the bearing.

[0061] The lower part of the clamp arm 2 is the clamp arm second lower half ring 2b with an opening facing downward, the axis of the clamp arm second lower half ring 2b is perpendicular to the axis of the clamp arm shaft 3, and the outer sides of the two free ends of the lower part of the clamp arm second lower half ring 2b are respectively hinged with clamp arm second arc-shaped shifting blocks 2c, and the recesses of the two clamp arm second arc-shaped shifting blocks 2c face each other and match the shapes of both sides of the outer end surface of the bearing.

[0062] The openings of the lower half ring 1b of the clamp arm and the second lower half ring 2b of the clamp arm are downward and can be straddled on the shaft. The two free ends of the lower half ring 1b of the clamp arm and the second lower half ring 2b of the clamp arm are opposite to the two sides of the bearing, and thrust can be applied to the two sides of the bearing in the horizontal diameter direction.

[0063] In the initial state, the lower half ring 1b of the clamp arm and the second lower half ring 2b of the clamp arm are close together, that is, the opening distance is zero, and they are parallel to each other, which is conducive to adapting to the smaller spacing between the bearing and the adjacent fixings on the shaft. As long as the spacing can meet the insertion of the lower end of the tooling, it can be used.

[0064] When the lower half ring 1b of the caliper arm and the second lower half ring 2b of the caliper arm rotate around the axis of the caliper arm shaft 3, the two are opened in an X shape and are no longer parallel to each other. The ideal adjustment state is to always push the bearing in the horizontal direction, so an arc-shaped shift block is set.

[0065] Insert the first arc-shaped shift block 1c of the clamp arm and the second arc-shaped shift block 2c of the clamp arm downward between the bearing and the adjacent fixing parts on the shaft. The shaft is located between the concave arcs of the first arc-shaped shift block 1c of the clamp arm and the second arc-shaped shift block 2c of the clamp arm. The piston rod 7a of the hydraulic cylinder 7 is pushed outward, and the semicircular push plate 4 pushes the first upper half ring 1a of the clamp arm and the second upper half ring 2a of the clamp arm to open a distance, that is, the upper jaw increases, and the lower jaw also increases synchronously. The distance between the first arc-shaped shift block 1c of the clamp arm and the second arc-shaped shift block 2c of the clamp arm is expanded, pushing the bearing to translate along the shaft.

[0066] When the lower half ring 1b of the clamp arm and the second lower half ring 2b of the clamp arm are separated from each other to form a jaw opening, the first arc-shaped block 1c of the clamp arm can rotate at the lower part of the lower half ring 1b of the clamp arm and remain in a vertical state; the second arc-shaped block 2c of the clamp arm can rotate at the lower part of the second lower half ring 2b of the clamp arm and remain in a vertical state. As the lower jaw opening is opened, the distance between the lower half ring 1b of the clamp arm and the second arc-shaped block 2c of the clamp arm changes, but they can always remain parallel to each other. One of the lower half ring 1b of the clamp arm or the second arc-shaped block 2c of the clamp arm is pressed against the outer end face of the bearing, and the other is pressed against the opposite end face of the adjacent fixing member on the shaft.

[0067] The two tongs arms have one arc-shaped shifting block 1c, which is a pair and located on the same circular ring. The circular ring is compatible with the bearing specifications and is coaxial with the lower half ring 1b of the tongs arm. The two tongs arms have two arc-shaped shifting blocks 2c, which are a pair and located on the same circular ring. The circular ring is also compatible with the bearing specifications and is coaxial with the lower half ring 2b of the tongs arm.

[0068] In the middle of the working surface of the arc-shaped shifting block 1c of the first clamping arm, there is a shifting block concave arc groove 1c1. In the middle of the working surface of the arc-shaped shifting block 2c of the second clamping arm, there is a shifting block concave arc groove 2c1 respectively. The shapes of the shifting block concave arc groove 1c1 and the shifting block concave arc groove 2c1 correspond to the space between the inner and outer rings of the bearing. The outer arc of the shifting block concave arc groove presses on the outer ring of the bearing, and the inner arc of the shifting block concave arc groove presses on the inner ring of the bearing, jointly translating the bearing axially; the shifting block concave arc groove avoids the balls and the cage, preventing damage to the balls during the process of adjusting the clearance.

[0069] The upper part of the first clamping arm is the upper half ring 1a of the first clamping arm with an upward opening. The upper part of the second clamping arm is the upper half ring 2a of the second clamping arm with an upward opening. The upper half ring 1a of the first clamping arm and the upper half ring 2a of the second clamping arm are parallel to each other and spaced apart.

[0070] The inner end face of the upper half ring 1a of the first clamping arm is connected with a semi-circular pushing plate 4. The semi-circular pushing plate 4 is located between the upper half ring 1a of the first clamping arm and the upper half ring 2a of the second clamping arm. On the inner end faces at both ends of the upper part of the upper half ring 1a of the first clamping arm, there are symmetrically arranged upper half ring slots 1a1 of the first clamping arm. On the upper part of the semi-circular pushing plate 4, there are symmetrically arranged semi-circular pushing plate bosses 4b. The two semi-circular pushing plate bosses 4b are correspondingly embedded in the upper half ring slots 1a1 of the first clamping arm, realizing the precise positioning of the semi-circular pushing plate 4 on the upper half ring 1a of the first clamping arm. The jaw opening driving mechanism pushes the top center of the semi-circular pushing plate 4, and the semi-circular pushing plate 4 transmits the thrust to the upper half ring 1a of the first clamping arm, increasing the distance between the upper half ring 1a of the first clamping arm and the upper half ring 2a of the second clamping arm, realizing the opening of the upper jaws.

[0071] The jaw opening driving mechanism includes a U-shaped support 5 and a hydraulic cylinder 7. The axis of the U-shaped support 5 is perpendicular to the axis of the upper half ring 2a of the second clamping arm. The cylinder block of the hydraulic cylinder 7 is fixed in the central hole of the U-shaped support 5, and the axis of the hydraulic cylinder 7 is parallel to the axis of the upper half ring 2a of the second clamping arm. On both sides of the central hole of the U-shaped support 5, there are symmetrically arranged support one-word countersunk grooves 5d. The side of the support one-word countersunk groove 5d facing the upper half ring 2a of the second clamping arm is open; on both sides of the cylinder block of the hydraulic cylinder 7, there are symmetrically arranged hydraulic cylinder lugs 7b. The hydraulic cylinder lugs 7b are correspondingly embedded at the bottom of the corresponding support one-word countersunk grooves 5d, bearing the reaction force when the hydraulic cylinder 7 is driven.

[0072] As Figure 8 shown, on the lower part of the side of the central hole of the U-shaped support facing the upper half ring of the second clamping arm, there is a lower slope 5e of the central hole of the support. On the lower part of the other side of the central hole of the U-shaped support, there is an upper slope 5f of the central hole of the support. The two hydraulic cylinder lugs 7b play an axial positioning role. When the piston rod 7a of the hydraulic cylinder 7 extends, the front end of the hydraulic cylinder can swing downward around the axis of the hydraulic cylinder lug 7b. The lower slope 5e of the central hole of the support and the upper slope 5f of the central hole of the support provide a clearance space for the swing of the hydraulic cylinder.

[0073] Both ends of the U-shaped support 5 are respectively provided with support clamps 5a extending vertically downward, and the support clamps 5a are correspondingly fixed on the outer sides of both ends of the upper half ring 2a of the second clamping arm.

[0074] The opposite end faces of the two support clamps 5a are symmetrically provided with vertically downward-opening support vertical grooves 5b; vertically downward-cutting grooves 2a1 are symmetrically provided on the outer arc surface inside the upper half ring 2a of the second clamping arm, and the uncut part forms a tenon 2a2 on the upper half ring of the second clamping arm. The lower ports of the support vertical grooves 5b of the two support clamps 5a are stuck on the tenon 2a2 on the upper half ring of the second clamping arm. After being inserted downward in place, the tenons 2a2 on the upper half rings of the two second clamping arms are correspondingly inserted into the support vertical grooves 5b. In this way, the support clamps 5a and the upper half ring 2a of the second clamping arm are positioned axially of the hydraulic cylinder 7. When the hydraulic cylinder 7 operates, the relative positions among the cylinder body of the hydraulic cylinder 7, the U-shaped support 5, and the upper half ring 2a of the second clamping arm remain unchanged.

[0075] The upper side walls of the two support vertical grooves 5b are provided with support transverse grooves 5c; the upper parts of the outer end faces of the upper half ring 2a of the second clamping arm are symmetrically provided with transverse grooves 2a3 on the upper half ring of the second clamping arm; after the support clamps 5a are inserted in place on the upper half ring 2a of the second clamping arm, the transverse grooves 2a3 on the upper half ring of the second clamping arm and the support transverse grooves 5c are flush in the height direction and are mutually positioned by the safety spring 6.

[0076] The safety spring 6 includes a semi-circular arc section with an upward opening. Both ends of the semi-circular arc section are respectively provided with safety spring inserts 6a parallel to the axis of the upper half ring of the second clamping arm. The elasticity of the semi-circular arc section enables the safety spring inserts 6a at both upper ends to maintain a radially outward tension. The two safety spring inserts 6a protrude radially outward from the semi-circular arc section and are correspondingly inserted into the support transverse grooves 5c; the two safety spring inserts 6a protrude axially inward from the semi-circular arc section and are correspondingly inserted into the transverse grooves 2a3 on the upper half ring of the second clamping arm. In this way, the upper half ring 2a of the second clamping arm and the support clamps 5a are positioned and fixed in the height direction, and their relative height positions are kept unchanged during operation. Removing the safety spring 6 allows the support clamps 5a to be slid upward and separated from the tenon 2a2 on the upper half ring of the second clamping arm.

[0077] Two parallel push plate lugs 4a are provided at the upper center of the semi-circular push plate 4. The free end of the piston rod 7a of the hydraulic cylinder 7 is inserted and fixed in the connecting shaft 8, and the free end of the connecting shaft 8 is T-shaped and connected with a radial hinge sleeve 8a. The radial hinge sleeve 8a is located between the two push plate lugs 4a and is coaxial. A push plate pin 4d is commonly inserted into the central holes of the radial hinge sleeve 8a and the two push plate lugs 4a. One end of the push plate pin 4d is provided with a push plate pin cap 4d1, and the push plate pin cap 4d1 abuts against the outside of one push plate lug 4a.

[0078] A through push plate pin center hole is provided along the axis of the push plate pin 4d. A push plate pin core shaft 4e is inserted into the push plate pin center hole. One end of the push plate pin core shaft 4e is provided with a core shaft mushroom head 4e1, and the core shaft mushroom head 4e1 abuts against the outer side of another push plate ear 4a. The other end of the push plate pin core shaft 4e is screwed with a core shaft lock nut 4e2, and the core shaft lock nut 4e2 presses on the center of the outer end face of the push plate pin cap 4d1. In this way, the free end of the piston rod 7a of the hydraulic cylinder 7 is hinged to the push plate ear 4a through the radial hinge sleeve 8a. When the piston rod 7a of the hydraulic cylinder 7 extends, when the connecting shaft 8 and the radial hinge sleeve 8a push the semi-circular push plate 4 and the upper half ring 1a of the clamping arm outwards, the radial hinge sleeve 8a can rotate on the push plate ear 4a to make up for the angle change.

[0079] When a huge thrust is applied to the upper part of the semi-circular push plate 4, its lower part is prone to flipping. Therefore, a movable locking pin 9 is provided at the lower part of the semi-circular push plate 4 to fix it to the lower part of the upper half ring 1a of the clamping arm.

[0080] The inner end of the movable locking pin 9 is a threaded section, the middle is a smooth rod section, and the outer end of the movable locking pin 9 is provided with a locking pin diamond head 9a. At the lower center of the inner end face of the upper half ring 1a of the clamping arm, there is a counterbore 1a2 in the upper half ring of the clamping arm. The outer port of the counterbore 1a2 in the upper half ring of the clamping arm is provided with a threaded hole 1a3 in the upper half ring of the clamping arm, and the inner diameter of the threaded hole 1a3 in the upper half ring of the clamping arm is larger than the diameter of the counterbore 1a2 in the upper half ring of the clamping arm.

[0081] The inner end of the movable locking pin 9 is inserted into the counterbore 1a2 in the upper half ring of the clamping arm and is screwed with a locking pin nut 10. A stop plug 11 is screwed into the threaded hole 1a3 in the upper half ring of the clamping arm, and the middle cylindrical section of the movable locking pin 9 passes through the central hole of the stop plug 11.

[0082] During installation, first pass the inner end of the movable locking pin 9 through the central hole of the stop plug 11, and then screw the locking pin nut 10 onto the threaded section of the movable locking pin 9. Two locking pin nuts 10 can be screwed together to prevent loosening. Place the locking pin nut 10 into the counterbore 1a2 in the upper half ring of the clamping arm, and then screw the stop plug 11 into the threaded hole 1a3 in the upper half ring of the clamping arm. In this way, the locking pin nut 10 is restricted in the counterbore 1a2 in the upper half ring of the clamping arm by the stop plug 11, but it can move axially for a certain distance, and the movable locking pin 9 can float left and right in the central hole of the stop plug 11 to achieve its function.

[0083] At the lower center of the semi-circular push plate 4, there is a push plate diamond through-hole 4c for the diamond head 9a of the locking pin to pass through and match with it. Rotate the diamond head 9a of the locking pin to the direction that coincides with the push plate diamond through-hole 4c, then put the push plate diamond through-hole 4c of the semi-circular push plate 4 on the diamond head 9a of the locking pin. Then, the tooling can be flipped 90°, making the diamond head 9a of the locking pin face downwards, which is convenient for it to pass through the push plate diamond through-hole 4c. Finally, rotate the diamond head 9a of the locking pin 90°, making the long axis of the diamond head 9a of the locking pin parallel to the short axis of the push plate diamond through-hole 4c. At this time, the diamond head 9a of the locking pin presses on the outer end face of the semi-circular push plate 4, and the locking pin nut 10 abuts against the inner end face of the stop plug 11. When the hydraulic cylinder 7 applies a huge thrust on the upper part of the semi-circular push plate 4, the diamond head 9a of the locking pin firmly locks the lower part of the semi-circular push plate 4 and abuts against the upper half ring 1a of the first clamping arm.

[0084] During disassembly, continue to rotate the diamond head 9a of the locking pin 90°, making the diamond head 9a of the locking pin rotate back to the direction that coincides with the push plate diamond through-hole 4c, and retract the diamond head 9a of the locking pin into the push plate diamond through-hole 4c. At this time, the locking pin nut 10 is located at the bottom of the counterbore 1a2 of the upper half ring of the first clamping arm, and the lower part of the semi-circular push plate 4 is unlocked from the upper half ring 1a of the first clamping arm, and the semi-circular push plate 4 can be removed.

[0085] At the outer port of the central hole of the stop plug, there is a diamond-shaped counterbore that matches the diamond head 9a of the locking pin. Half of the diamond head 9a of the locking pin is embedded in the diamond-shaped counterbore to be able to rotate the stop plug 11. By turning the outer end of the diamond head 9a of the locking pin with a wrench, the diamond head 9a of the locking pin can be screwed tightly into the threaded hole 1a3 of the upper half ring of the first clamping arm. The stop plug 11 only needs to be installed once, and the movable locking pin 9 does not need to be reinstalled repeatedly, and the functions of locking or unlocking can be realized repeatedly.

[0086] The above is only the preferred and feasible embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. It does not limit the patent protection scope of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. Except for the above embodiments, without departing from the spirit and scope of the present invention, the present invention can have other implementation manners. The present invention will also have various changes and improvements. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention. The protection scope required by the present invention is defined by the appended claims and their equivalents. The technical features not described in the present invention can be realized by or adopted the existing technologies, and will not be elaborated here.

Claims

1. A radial clearance adjustment tooling for bearings in a deep cavity and narrow space, comprising a first clamp arm and a second clamp arm hinged in an X shape, characterized in that: A jaw opening drive mechanism is provided between the upper parts of the first jaw arm and the second jaw arm. The lower ends of the first jaw arm and the second jaw arm abut against between the outer end face of the bearing and the adjacent fixing member on the shaft as the jaws open. The upper part of the first jaw arm is the upper semi-ring of the first jaw arm with an upward opening, and the upper part of the second jaw arm is the upper semi-ring of the second jaw arm with an upward opening. A semi-circular push plate is provided between the upper semi-ring of the first jaw arm and the upper semi-ring of the second jaw arm. The semi-circular push plate is connected to the inner end face of the upper semi-ring of the first jaw arm. The jaw opening drive mechanism pushes the semi-circular push plate to realize the opening of the upper jaws. The jaw opening drive mechanism includes a U-shaped support and a hydraulic cylinder. The axis of the U-shaped support is perpendicular to the axis of the upper semi-ring of the second jaw arm, and the axis of the hydraulic cylinder is parallel to the axis of the upper semi-ring of the second jaw arm. Vertical support clamps extending downward are respectively provided at both ends of the U-shaped support. The support clamps are correspondingly fixed on the outer sides of both ends of the upper semi-ring of the second jaw arm. The cylinder block of the hydraulic cylinder is fixed in the central hole of the U-shaped support, and the free end of the piston rod of the hydraulic cylinder is hinged to the upper part of the semi-circular push plate.

2. The radial clearance adjustment tooling for bearings in deep cavities and narrow spaces according to claim 1, characterized in that: The middle parts of the first jaw arm and the second jaw arm intersect with each other and are hinged to each other through a jaw arm shaft. The lower part of the first jaw arm is the lower semi-ring of the first jaw arm with a downward opening. Outer sides of the two free ends at the lower part of the lower semi-ring of the first jaw arm are respectively hinged with arc-shaped blocks of the first jaw arm. The concave parts of the two arc-shaped blocks of the first jaw arm face each other and match the shapes on both sides of the outer end face of the bearing. The lower part of the second jaw arm is the lower semi-ring of the second jaw arm with a downward opening. Outer sides of the two free ends at the lower part of the lower semi-ring of the second jaw arm are respectively hinged with arc-shaped blocks of the second jaw arm. The concave parts of the two arc-shaped blocks of the second jaw arm face each other and match the shapes on both sides of the outer end face of the bearing.

3. The radial clearance adjusting tooling for bearings in deep cavity and narrow space according to claim 2, wherein: The axes of the lower semi-ring of the first jaw arm and the lower semi-ring of the second jaw arm are both perpendicular to the axis of the jaw arm shaft.

4. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 1, characterized in that: The lower semi-ring of the first jaw arm and the two arc-shaped blocks of the first jaw arm are coaxial, and the lower semi-ring of the second jaw arm and the two arc-shaped blocks of the second jaw arm are coaxial.

5. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 4, characterized in that: In the initial state, the lower semi-ring of the first jaw arm and the lower semi-ring of the second jaw arm are parallel to each other and abutted together, and the upper semi-ring of the first jaw arm and the upper semi-ring of the second jaw arm are parallel to each other and spaced apart.

6. The radial clearance adjusting tooling for the bearing in a deep cavity and narrow space according to claim 1, wherein: Vertically downward-opening support vertical grooves are symmetrically provided on the facing end faces of the two support clamps; vertically cutting grooves are symmetrically provided on the outer arc face inside the upper semi-ring of the second jaw arm. The uncut parts form tenons of the upper semi-ring of the second jaw arm. The two tenons of the upper semi-ring of the second jaw arm are correspondingly inserted into the support vertical grooves.

7. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 6, characterized in that: The support clamps and the upper semi-ring of the second jaw arm are positioned and fixed to each other in the height direction through a safety spring.

8. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 7, characterized in that: Horizontally support grooves are provided on the upper side walls of the two support vertical grooves, and horizontally grooves of the upper semi-ring of the second jaw arm are symmetrically provided on the upper part of the outer end face of the upper semi-ring of the second jaw arm; after the support clamps are inserted in place on the upper semi-ring of the second jaw arm, the horizontally grooves of the upper semi-ring of the second jaw arm and the support horizontal grooves are flush in the height direction and are positioned relative to each other through the safety spring.

9. The radial clearance adjustment tooling for bearings in deep cavities and narrow spaces according to claim 8, wherein: The insurance spring includes a semi-circular arc section with an upward opening. At both ends of the semi-circular arc section, there are respectively insurance spring inserts parallel to the axis of the upper semi-ring of the second pliers arm. The two insurance spring inserts protrude radially outward from the semi-circular arc section and are correspondingly inserted into the transverse grooves of the support seat. The two insurance spring inserts protrude axially inward from the semi-circular arc section and are correspondingly inserted into the transverse grooves of the upper semi-ring of the second pliers arm.

10. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 1, characterized in that: The free end of the piston rod of the hydraulic cylinder is inserted and fixed in the connecting shaft. The free end of the connecting shaft is T-shaped and connected with a radial hinge sleeve. At the upper center of the semi-circular push plate, there are two parallel push plate lugs. The radial hinge sleeve is located between the two push plate lugs and is coaxial. A push plate pin is inserted into the central holes of the radial hinge sleeve and the two push plate lugs. One end of the push plate pin is provided with a push plate pin cap, and the push plate pin cap abuts against the outside of one push plate lug. A through push plate pin central hole is provided along the axis of the push plate pin. A push plate pin core shaft is inserted into the push plate pin central hole. One end of the push plate pin core shaft is provided with a core shaft mushroom head, and the core shaft mushroom head abuts against the outside of the other push plate lug. The other end of the push plate pin core shaft is screwed with a core shaft lock nut, and the core shaft lock nut presses on the center of the outer end face of the push plate pin cap.

11. The radial clearance adjustment tooling for bearings in deep cavities and narrow spaces according to claim 1, characterized in that: On the inner end faces at both ends of the upper part of the upper semi-ring of the first pliers arm, there are symmetrically arranged upper semi-ring slots of the first pliers arm. On the upper part of the semi-circular push plate, there are symmetrically arranged semi-circular push plate bosses, and the two semi-circular push plate bosses are correspondingly inserted into the upper semi-ring slots of the first pliers arm.

12. The radial clearance adjusting tooling for bearings in deep cavities and narrow spaces according to claim 1, wherein: The lower part of the semi-circular push plate is connected to the lower part of the upper semi-ring of the first pliers arm through a movable locking pin. At the lower center of the inner end face of the upper semi-ring of the first pliers arm, there is a sunken hole of the upper semi-ring of the first pliers arm. The outer port of the sunken hole of the upper semi-ring of the first pliers arm is provided with an enlarged diameter threaded hole of the upper semi-ring of the first pliers arm. The inner end head of the movable locking pin is inserted into the sunken hole of the upper semi-ring of the first pliers arm and is screwed with a locking pin nut. A stop plug is screwed into the threaded hole of the upper semi-ring of the first pliers arm. The middle cylindrical section of the movable locking pin passes through the central hole of the stop plug. The outer end of the movable locking pin is provided with a locking pin diamond head. The lower center of the semi-circular push plate is provided with a push plate diamond through hole for the locking pin diamond head to pass through and match. When the locking pin diamond head retracts into the push plate diamond through hole, the locking pin nut is located at the bottom of the sunken hole of the upper semi-ring of the first pliers arm, and the semi-circular push plate is disengaged from the upper semi-ring of the first pliers arm. When the locking pin diamond head presses on the outer end face of the semi-circular push plate and the long axis of the locking pin diamond head is parallel to the short axis of the push plate diamond through hole, the locking pin nut abuts against the inner end face of the stop plug, and the semi-circular push plate is locked.

13. The radial clearance adjustment tooling for bearings in deep cavities and narrow spaces according to claim 12, characterized in that: The outer port of the central hole of the stop plug is provided with a diamond-shaped sunken hole matching the locking pin diamond head. Half of the locking pin diamond head is embedded in the diamond-shaped sunken hole to be able to rotate the stop plug and screw it tightly in the threaded hole of the upper semi-ring of the first pliers arm.

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