CN213632669U - Clamping and self-locking device for force amplification shaft end - Google Patents

Abstract

The utility model relates to a tight self-lock device of axle head clamp is enlargied to power, a serial communication port, include: the device comprises a shell, a ball, a retainer, a clamping pressing block, a spiral pressing block, a bearing shell, a test bearing and a connecting shaft; the shell is connected with the spiral pressing block through internal and external threads, the ball groove of the spiral pressing block is in spherical contact with the ball, the ball is in point contact with the spherical surface of the side wall of the shell, the retainer is rigidly connected with the spiral pressing block after being installed to be axially fixed, the number of the clamping pressing blocks is six, the axes of the clamping pressing blocks are symmetrically installed in the retainer and are in sliding fit with the retainer, the clamping pressing blocks are prevented from falling off through the limit stop at the top of the clamping pressing blocks, the clamping pressing blocks are installed on the connecting shaft in a matched mode through shaft holes and are matched with a shaft shoulder of the connecting shaft to axially position the test bearing, and a set of bearing test force amplification shaft end clamping self-locking device is formed by the.

Description

Clamping and self-locking device for force amplification shaft end

Technical Field

The utility model relates to a run at special bearing and test axle head fixed auto-lock presss from both sides tight field, especially relates to a power amplification axle head presss from both sides tight self-lock device.

Background

At present, in the field of bearing running and testing shaft end clamping, because of different models of test bearings, the shaft diameter change is large, the requirement on the processing precision of the threads of the tested shaft end is high, and a nut needing to be locked has small damage to the threads, so that a plurality of wearing parts are caused in the bearing running and testing, the economic waste is large, and the increasing requirements are difficult to meet; for overcoming these problems, the utility model provides a tight self-lock device of power amplification axle head clamp has smallly, and the counter shaft end required precision is little, and self-locking performance is good, and the structure is solid durable, and it is convenient to dismantle the maintenance, and it is big to be suitable for the breadth, and the counter shaft damage is low, advantages such as modular structural design.

Disclosure of Invention

The utility model aims at providing a simple structure is durable, and is small, and self-locking performance is good, whole modular design, and convenient and fast is dismantled in the installation, can be suitable for the tight self-lock device of a power amplification axle head clamp of different specification axles.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a force amplifying shaft end clamping self-locking device, comprising: the device comprises a shell, a ball, a retainer, a clamping pressing block, a spiral pressing block, a bearing shell, a test bearing and a connecting shaft; the shell with the spiral briquetting passes through interior external screw thread connection, spiral briquetting ball groove with ball spherical contact, the ball with shell lateral wall spherical point contact, the holder installation back with spiral briquetting rigid connection carries out axial fixity, it has six to press from both sides tight briquetting, and the axle center symmetry is installed in the holder, with holder sliding fit, through press from both sides tight briquetting top limit stop and prevent to drop, press from both sides tight briquetting and install through the shaft hole cooperation on the connecting axle, the cooperation the connecting axle shoulder is right experimental bearing carries out axial positioning, with the test force amplification axle head that one set of bearing was constituteed to the bearing shell presss from both sides tight self-lock device.

Further, a rightward force F is generated relative to the shell by rotating the helical pressing block, and the force is transmitted to the clamping pressing block under the action of the balls and the side wall of the shell to form a radial force F ', and the radial force F' is F multiplied by 1/tana multiplied by 1/tanb through the transmission of the force; according to the trigonometric function relationship, when the angle a and the angle b are smaller than 45 degrees, F' is larger than F, the amplification of the shaft end clamping force is realized, and the shaft end clamping self-locking function is realized.

Further, the material that the spiral briquetting adopted is 45 # steel, and inside is that the tapering type leaks hopper-shaped, and axle center symmetrical processing has six ball grooves, the increase with ball area of contact reduces some face contact stress concentration, the thin tooth screw thread of spiral briquetting outer lane processing metric system reduces the helix angle, more does benefit to the auto-lock of screw thread.

Furthermore, the retainer is made of nickel-copper alloy, has good mechanical property and high-temperature strength, good corrosion resistance and wear resistance, is easy to process, is cylindrical as a whole, is internally provided with six guide grooves with axisymmetric axes, reduces friction between the retainer and the clamping pressing block, and prolongs the service life.

Further, press from both sides tight briquetting and adopt 45 steel, wear resistance is good, and intensity hardness is big, wholly is the loop configuration, and top inclined plane processing has the ball groove, the increase with ball area of contact realizes bearing great radial extrusion force, promotes operation scope and security performance, and the bottom is the circular slot face, increase and the area of contact of axle head, and axial contact length is big, and stress concentration, safe and reliable that less moment of flexure brought.

Implement the utility model relates to a power amplification axle head presss from both sides tight self-lock device, its beneficial effect lies in:

(1) locking device realizes the locking of axle head through rotatory spiral briquetting for the modularized design, realizes that axial auto-lock is fixed in narrow and small space, and ball project organization is reasonable, and convenient and fast is dismantled in the installation, fixes a position safe and reliable, and the damage of counter shaft end is little, and the maintenance is maintained simply high-efficiently.

(2) The utility model relates to a tight self-lock device of power amplification axle head clamp can satisfy no threaded connection's axle head, can realize the span of shaft diameter and use, has avoided the screw thread to compress tightly the damage of frequently dismantling counter shaft end screw thread in the experimentation, and the global design practicality is strong, easy operation, and auto-lock is effectual, improves the availability factor, and economic nature is superior.

Drawings

FIG. 1 is a schematic view of the installation structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a left side view of the present invention;

fig. 4 is a schematic view of the ball bearing of the present invention.

In the figure: 1-shell, 2-ball, 3-retainer, 4-clamping pressing block, 5-spiral pressing block, 6-bearing shell, 7-test bearing and 8-connecting shaft.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, 2, 3 and 4, the force amplification shaft end clamping self-locking device comprises: the device comprises a shell 1, a ball 2, a retainer 3, a clamping pressing block 4, a spiral pressing block 5, a bearing shell 6, a test bearing 7 and a connecting shaft 8; the shell 1 with spiral briquetting 5 is through interior external screw thread connection, 5 ball grooves of spiral briquetting with 2 sphere contacts of ball, ball 2 with 1 lateral wall sphere point contact of shell, 3 installation backs of holder with 5 rigid connection of spiral briquetting carry out axial fixity, press from both sides tight briquetting 4 and have six, the axle center symmetry is installed in the holder 3, with 3 sliding fit of holder, through press from both sides tight briquetting 4 top limit stop and prevent to drop, press from both sides tight briquetting 4 and install through the shaft hole cooperation on connecting axle 8, the cooperation 8 shoulders of connecting axle are right experimental bearing 7 carries out axial positioning, with the test power that one set of bearing was constituteed to bearing housing 6 amplifies the axle head and presss from both sides tight self-lock device.

As shown in fig. 1, 2, 3 and 4, a force amplifying shaft end clamping self-locking device generates a right force F relative to the housing 1 by rotating the helical pressing block 5, and transmits the force to the clamping pressing block 4 to form a radial force F 'under the action of the ball 2 and the side wall of the housing 1, and the radial force F' is F × 1/tana × 1/tanb by the transmission of the force; according to the trigonometric function relationship, when the angle a and the angle b are smaller than 45 degrees, F' is larger than F, the amplification of the shaft end clamping force is realized, and the shaft end clamping self-locking function is realized.

As shown in fig. 1, 2, 3, 4, a tight self-lock device of power amplification axle head clamp, the material that spiral briquetting 5 adopted is No. 45 steel, and inside is hopper-shaped for the tapering type, and the processing of axis symmetry has six ball grooves, the increase with 2 area of contact of ball reduces point face contact stress and concentrates, the thin thread of metric system of spiral briquetting 5 outer lane processing has the little characteristics of helix angle, more does benefit to the auto-lock of screw thread.

As shown in fig. 1, 2, 3 and 4, the force amplification shaft end clamping self-locking device is characterized in that the retainer 3 is made of nickel-copper alloy, has good mechanical property and high-temperature strength, good corrosion resistance and wear resistance, is easy to process, is cylindrical as a whole, is internally provided with six guide grooves with symmetrical axes, reduces friction between the retainer and the clamping pressing block 4, and prolongs the service life.

As shown in figures 1, 2, 3 and 4, the force amplification shaft end clamping self-locking device is characterized in that the clamping pressing block 4 is made of 45 steel, the wear resistance is good, the strength and hardness are high, the whole structure is annular, a ball groove is machined on the inclined plane of the top of the clamping pressing block, the contact area of the ball and the contact area of the ball 2 are increased, large radial extrusion force is borne, the operation range and the safety performance are improved, the bottom of the clamping pressing block is a circular groove surface, the contact area of the bottom of the clamping pressing block and the shaft end is increased, the axial contact length is large, stress concentration caused by small.

As shown in fig. 1, 2, 3 and 4, one working mode of the force amplification shaft end clamping self-locking device is as follows: the shell 1 is connected with the spiral pressing block 5 through internal and external threads, the ball groove of the spiral pressing block 5 is in spherical contact with the ball 2, the ball 2 is in point contact with the spherical surface of the side wall of the shell 1, the retainer 3 is axially fixed in rigid connection with the spiral pressing block 5 after being installed, six clamping pressing blocks 4 are arranged, the axes are symmetrically installed in the retainer 3 and are in sliding fit with the retainer 3, the clamping pressing blocks 4 are prevented from falling off through a top limit stop block, the clamping pressing blocks 4 are installed on the connecting shaft 8 in a matched mode through shaft holes, the shaft shoulders of the connecting shaft 8 are matched to axially position the test bearing 7, the bearing shell 6 is matched with the outer ring of the test bearing 7 to form a set of bearing testing force amplification shaft end clamping self-locking device, the spiral pressing block 5 is rotated, and the axial distance between the shell 1 and the spiral pressing block 5 is shortened, the ball 2 moves downwards to push the clamping pressing block 4 to move vertically in the retainer 3, so that the functions of force amplification and axial compression self-locking are realized.

The protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (4)

1. A force amplifying shaft end clamping self-locking device is characterized by comprising: the device comprises a shell (1), a ball (2), a retainer (3), a clamping press block (4), a spiral press block (5), a bearing shell (6), a test bearing (7) and a connecting shaft (8); the shell (1) is connected with the spiral pressing block (5) through internal and external threads, the ball groove of the spiral pressing block (5) is in contact with the spherical surface of the ball (2), the ball (2) is in point contact with the spherical surface point of the side wall of the shell (1), the retainer (3) is rigidly connected with the spiral pressing block (5) for axial fixation after being installed, six clamping pressing blocks (4) are arranged, the axes are symmetrically arranged in the retainer (3) and are in sliding fit with the retainer (3), the clamping pressing block (4) is prevented from falling off by a top limit stop block, the clamping pressing block (4) is installed on the connecting shaft (8) in a matched mode through a shaft hole and is matched with a shaft shoulder of the connecting shaft (8) to axially position the test bearing (7), and the bearing shell (6) and the force amplification shaft end clamping self-locking device for bearing test are formed into a set.

2. The shaft end clamping self-locking device with the power amplification as set forth in claim 1, characterized in that: spiral briquetting (5) adopt 45 steel material, and inside is that the tapering type leaks hopper-shaped, and axle center symmetrical processing has six ball grooves, the increase with ball (2) area of contact reduces some face contact stress concentration, spiral briquetting (5) outer lane processing metric system fine thread reduces the size of helix angle.

3. The shaft end clamping self-locking device with the power amplification as set forth in claim 1, characterized in that: the retainer (3) is made of nickel-copper alloy, is cylindrical as a whole, is internally provided with six guide grooves with symmetrical axes, and reduces friction between the retainer and the clamping pressing block (4).

4. The shaft end clamping self-locking device with the power amplification as set forth in claim 1, characterized in that: the clamping pressing block (4) is made of 45 steel materials, is of an annular structure as a whole, and is provided with a ball groove in the inclined plane at the top, so that the contact area of the clamping pressing block and the ball (2) is increased.

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