CN218207671U - Anti-loosening structure for preventing bearing from loosening - Google Patents

Abstract

The utility model discloses an anti-loose structure for preventing bearing looseness, which relates to the technical field of anti-loose structure design of bearings and comprises a fixed seat, wherein first bearings are placed in object placing cavities at two ends of the fixed seat; the screw rod piece comprises a screw rod body and an input end, the input end stretches across the two object placing cavities of the fixing base, the first bearing is sleeved on the input end, a first fastening piece is arranged at one end, away from the screw rod body, of the input end, the first fastening piece is in threaded connection with the input end and abuts against the first bearing in the object placing cavity, and the screw rod piece abuts against the first bearing in the object placing cavity; the anti-loosening component comprises a second fastener and an anti-loosening assembly, the second fastener is arranged between the first bearing and the first fastener, the second fastener is connected with the input end in a clamping mode, and the anti-loosening assembly is arranged on the first fastener. The utility model provides a pair of locking structure that prevents bearing looseness can effectively overcome the thrust output of tens of tons of reciprocating motion and cause the not hard up difficult problem of thrust bearing axial among the screw drive.

Description

Anti-loosening structure for preventing bearing from loosening

Technical Field

The utility model relates to a locking structural design technical field of bearing, in particular to prevent not hard up locking structure of bearing.

Background

At present, the bending center in the market can output dozens of tons of thrust when the metal plate is bent in a reciprocating motion mode, the axial locking requirement of the thrust bearing in the screw rod transmission device is very high, and the axial locking of the thrust bearing is required to be ensured not to loosen to generate a gap. The axial locking mode of adopting locking formula round nut in the common application can generally guarantee thrust bearing axial locking to the thrust of several tons of grades, but tens tons of thrust increase substantially to thrust bearing axial locking's the degree of difficulty, has great inefficacy risk and maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the embodiment of the utility model provides a prevent not hard up anti loosening structure of bearing can effectively overcome the thrust output of reciprocating motion tens of tons and cause the not hard up difficult problem of thrust bearing axial among the screw drive.

According to the utility model provides a locking structure for preventing bearing looseness, including the fixing base, the both ends of fixing base all are provided with puts the thing chamber, put the thing intracavity in two and all placed first bearing; the screw rod piece comprises a screw rod body and an input end which are connected with each other, the input end enters the object placing cavity at one end of the fixing seat and extends into the object placing cavity at the other end of the fixing seat, the first bearing is sleeved on the input end, a first fastening piece is arranged at one end, away from the screw rod body, of the input end, the first fastening piece is in threaded connection with the input end and can move to abut against the first bearing in the object placing cavity, and the screw rod piece abuts against the first bearing in the object placing cavity; and the anti-loosening component comprises a second fastener and an anti-loosening assembly, the second fastener is arranged between the first bearing and the first fastener, the second fastener is connected with the input end in a clamping mode, the anti-loosening assembly is arranged on the first fastener, and pre-pressure provided by the anti-loosening assembly acts on the second fastener.

Above-mentioned locking structure who prevents bearing looseness has following beneficial effect at least: the anti-loose structure is mainly applied to installation and fixation of a screw rod, during assembly, two first bearings are respectively installed in object placing cavities at two ends of a fixing seat, the first bearings are ensured to abut against the bottom of the object placing cavities, then an input end of a screw rod piece enters the object placing cavity at one end of the fixing seat and extends into the object placing cavity at the other end of the fixing seat, the first bearings are sleeved on the input end, the screw rod piece abuts against the first bearings in the object placing cavities, after the first bearings abut against the first bearings in the object placing cavities, a second fastening piece is clamped at the input end, then the first fastening piece is installed at the free end of the input end, the first fastening piece is screwed until the first fastening piece moves to abut against the first bearings in the object placing cavities, the first fastening piece continues to be screwed for 0.5-1.5 circles after moving to abut against the first bearings in the object placing cavities, the first bearings are ensured to be completely attached to the bottom of the object placing cavities, meanwhile, the screw rod piece tightly presses against the first bearings, the installation is ensured to be stable, then the anti-loose assembly is installed on the first fastening piece, and the second fastening piece is pressed against the second fastening piece with a certain pre-pressing force. Compared with the prior art, the problem of failure risk and high maintenance cost caused by clearance generated by axial looseness of the bearing in the bending central screw rod transmission device in the existing market is solved, the design is simple and reliable, the axial looseness-preventing problem of the heavy-load screw rod transmission device can be effectively solved only by adding the second fastening piece and the looseness-preventing assembly, meanwhile, the pre-pressure can be adjusted according to needs, and the reasonable pre-pressure is balanced with the force which enables the bearing to offset part of the weight of the gravity part to act on the screw rod.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, the second fastener includes two arc pieces that are formed by the cutting of same ring, be provided with on the input with arc piece matched with joint groove, two the arc piece is followed the both sides card in joint groove is gone into behind the joint groove, two have the clearance between the tip of arc piece.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, arc piece orientation the one side of first bearing is first plane, arc piece orientation the one side of first fastener is first inclined plane, the joint groove is close to the first groove wall of first bearing with first plane is parallel, the joint groove is kept away from the second groove wall orientation of first bearing first fastener slope is in order to form the second inclined plane, first inclined plane is parallel the second inclined plane.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, arc piece chucking in behind the joint groove, first inclined plane laminating the second inclined plane, first plane with the laminating of first bearing, first groove wall is at a distance from distance between the first plane is at 0.1 to 0.2mm.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, first fastener orientation one side of first bearing is provided with keeps away the dead slot, the second fastener is located keep away in the dead slot, the degree of depth of keeping away the dead slot is greater than the thickness of second fastener.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, locking subassembly includes a plurality of third fasteners and a plurality of fourth fastener, and is a plurality of third fastener threaded connection first fastener just can move to support the side of second fastener, and is a plurality of fourth fastener threaded connection first fastener just can move to support the second fastener is kept away from the one side of first bearing.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, it is a plurality of the third fastener be circumference array arrange in first fastener, it is a plurality of the extension line of the direction of motion of first fastener intersect in the center pin of silk member, it is a plurality of the fourth fastener is circumference array arrange in first fastener, the direction of motion of fourth fastener is parallel the center pin of silk member.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, according to input extremely the moment of torsion pretension of input the moment of torsion of third fastener, so that the pre-compaction moment of torsion of first bearing is for inputing to 5% ~ 10% of the moment of torsion of input, wherein, first bearing is thrust ball bearing, is close to first fastener first bearing with it still is provided with deep groove ball bearing to put between the bottom in thing chamber.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, first fastener be provided with third fastener matched with screw hole, still be provided with the fifth fastener in the screw hole, the fifth fastener supports the third fastener.

According to the utility model provides a prevent not hard up anti loosening structure of bearing, the third fastener the fourth fastener with the fifth fastener is the machine meter screw.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The following description is to be read in connection with the drawings and the examples the utility model is further explained;

fig. 1 is a schematic structural view of a bending apparatus according to an embodiment of the present invention;

fig. 2 is a schematic view of an anti-loosening structure for preventing bearing loosening after the assembly of the embodiment of the present invention is completed;

FIG. 3 isbase:Sub>A cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is an enlarged schematic view at B in FIG. 3;

FIG. 5 is an enlarged schematic view at C in FIG. 3;

fig. 6 is an enlarged schematic view at D in fig. 5.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The bending center is automatic metal plate bending numerical control machine tool equipment, an upper sliding block mechanism Z-axis servo motor of the bending equipment converts rotary motion into linear motion through a screw-nut pair structure to drive the upper sliding block mechanism to move up and down, an upper pressing knife is installed at the lower end of an upper sliding block, when a feeding mechanism sends a metal plate workpiece to a specified bending position, the Z-axis servo motor drives the upper sliding block mechanism to move down to compress the metal plate workpiece through the upper pressing knife to enable the metal plate workpiece to be fixed, and then the front bending axis X and the rear bending axis X and the upper bending axis Y of the movable tool apron device are in linkage control to bend at different angles according to set tracks.

The X/Y/Z can output dozens of tons of thrust when reciprocating in the metal plate bending process, the requirement on axial locking of a thrust bearing in a screw rod transmission device is very high, and the axial locking of the thrust bearing cannot be loosened to generate a gap. At present, the bending center in the market can output dozens of tons of thrust during the reciprocating motion of a bent metal plate, the axial locking requirement of a thrust bearing in a screw rod transmission device is very high, and the axial locking of the thrust bearing is required to be ensured not to be loosened to generate a gap. The screw rod transmission device usually adopts the locking type round nut to fix and fasten the bearing and the screw rod, the axial locking mode of the locking type round nut can generally guarantee axial looseness prevention of the thrust bearing for thrust of several tons, but the axial looseness prevention difficulty of the thrust bearing is greatly improved by dozens of tons of thrust, and great failure risk and maintenance cost exist.

Referring to fig. 2 and 3, an embodiment of the present invention provides a loose-proof structure for preventing a bearing from loosening, including a fixing base 310, a screw member 340 and a loose-proof member, wherein two ends of the fixing base 310 are respectively provided with a storage cavity, and a first bearing 330 is disposed in each of the two storage cavities; the screw rod piece 340 comprises a screw rod body and an input end which are connected with each other, the input end enters from the object placing cavity at one end of the fixed seat 310 and extends into the object placing cavity at the other end of the fixed seat 310, the first bearing 330 is sleeved on the input end, a first fastener 450 is arranged at one end, far away from the screw rod body, of the input end, the first fastener 450 is in threaded connection with the input end and can move to abut against the first bearing 330 in the object placing cavity, and the screw rod piece 340 abuts against the first bearing 330 in the object placing cavity; the anti-loose member includes a second fastening member 430 and an anti-loose assembly, the second fastening member 430 is disposed between the first bearing 330 and the first fastening member 450, the second fastening member 430 is connected to the input end in a clamping manner, the anti-loose assembly is disposed on the first fastening member 450, and the pre-pressure provided by the anti-loose assembly acts on the second fastening member 430.

Specifically, as shown in fig. 1, the bending apparatus mainly includes a machine tool body 100, a vertically disposed Z-axis motion module, a horizontally disposed X-axis motion module, and a vertically disposed Y-axis motion module are installed on the machine tool body 100, wherein a fixed tool apron 530 is further installed on the machine tool body 100, a slider capable of performing linear reciprocating motion along a vertical direction on the Z-axis motion module is provided with an upper press blade 510, a Y-axis motion module is erected on a slider capable of performing linear reciprocating motion along a horizontal direction on the X-axis motion module, wherein a lower bending blade 521 and an upper bending blade 522 are arranged on the slider capable of performing linear reciprocating motion along the vertical direction on the Y-axis motion module, the upper bending blade 522 is directly above the lower bending blade 521, and the Z-axis motion module, the X-axis motion module, and the Y-axis motion module all drive the slider in a manner of a double screw rod. When the bending equipment works, an operator places a workpiece to be bent on a feeding mechanism of the machine tool body 100, the workpiece to be bent is conveyed to the fixed tool apron 530 through the feeding mechanism, then the action of the Z-axis motion module drives the upper press cutter 510 to move downwards until the upper press cutter 510 presses the workpiece to be bent onto the fixed tool apron 530, after the workpiece to be bent is fixed, the X-axis motion module drives a sliding block on the X-axis motion module to move, so that a lower bending cutter 521 and an upper bending cutter 522 on the Y-axis motion module are driven to move to be close to the workpiece to be bent, the workpiece to be bent is located between the lower bending cutter 521 and the upper bending cutter 522, the X-axis motion module and the Y-axis motion module drive the lower bending cutter 521 and the upper bending cutter 522 to cooperatively move to realize interpolation motion according to a step setting program of the workpiece to be bent, so that the lower bending cutter 521 or the upper bending cutter 522 are controlled to perform linear or circular motion to finish downward or upward bending of the workpiece to be bent, and after the downward or upward bending operation, the X-axis motion module and the Y-axis motion module drive the lower bending cutter 521 and the upper bending cutter 510 to return to the in situ, and the workpiece to be bent by the upper bending mechanism. Further, as shown in fig. 2, the motion module according to an embodiment of the present invention includes a motor 210, a motor fixing member 220, a speed reducer 230, a fixing base 310, a lead screw 340, a lead screw nut 350, and a lead screw free end fixing member 360, wherein the lead screw 340 is rotatably connected to the fixing base 310, the fixing base 310 and the motor fixing member 220 are installed on the machine tool body 100, the speed reducer 230 is fixed on the machine tool, the input end of the speed reducer 230 is butted with the motor 210, the output end of the speed reducer 230 is butted with the lead screw 340, the output torque of the motor 210 is amplified through the speed reducer 230, and the amplified torque is transmitted to the input end of the lead screw 340, the lead screw free end fixing member 360 is used for fixing the free end of the lead screw 340, the lead screw nut 350 is in threaded connection with the lead screw 340, after the assembly is completed, the lead screw nut 350 is connected to a slider on the machine tool body 100, so that the bending knife or the pressing knife can perform linear or curvilinear motion to complete the bending operation of the sheet metal plate or other workpieces.

The embodiment of the present invention provides an anti-loose structure for preventing bearing from loosening, which is mainly applied to the installation and fixation of a lead screw, during the assembly, two first bearings 330 are respectively installed into the object placing cavities at two ends of the fixing base 310, it is ensured that the first bearings 330 abut against the bottom of the object placing cavity, then the input end of the screw rod 340 enters the object placing cavity at one end of the fixing base 310 and extends into the object placing cavity at the other end of the fixing base 310, the first bearings 330 are sleeved on the input end, and the screw rod 340 abuts against the first bearings 330 in the object placing cavity, after the completion, the second fasteners 430 are clamped on the input end, the first fasteners 450 are installed at the free end of the input end, the first fasteners 450 are screwed until the first fasteners 450 move to abut against the first bearings 330 in the object placing cavity, and then the first fasteners 450 continue to be screwed for 0.5-1.5 circles, it is ensured that the first bearings 330 and the bottom of the object placing cavity are completely attached to the object placing cavity, meanwhile, the anti-loose fasteners 340 also press the first bearings 330 tightly, and then the anti-loose assembly is installed on the lead screw, and the anti-loose assembly is pressed by a certain pre-loose assembly, and the second fasteners 430. Compared with the prior art, the anti-loose structure for preventing the bearing from loosening solves the problems of failure risk and high maintenance cost caused by clearance generated by axial loosening of the bearing in a bending center screw rod transmission device in the existing market, is simple and reliable in design, can effectively solve the axial anti-loose problem of a heavy-load screw rod transmission device by only adding the second fastening piece 430 and the anti-loose assembly and matching with the input end of the corresponding design screw rod piece 340, can adjust pre-pressure according to needs, is balanced with the force of partial weight of a bearing capable of offsetting a gravity part acting on a screw rod by utilizing reasonable pre-pressure, and is simple and reliable in structure.

Wherein, the second fastener 430 includes two arc pieces that are formed by the cutting of same ring, two arc pieces that are formed by the cutting of same ring have the same machining error, and two arc pieces are the symmetry piece, can not appear both ends one end behind follow-up two arc piece joint silk member 340 and press tightly a bit, the other end presses the condition that gets loose a bit, furthermore, be provided with on the input with arc piece matched with joint groove 341, when installing two arc pieces, two arc pieces are gone into behind the joint groove 341 from the both sides card of joint groove 341, have certain clearance between the tip of two arc pieces, make the further card of space that follow-up arc piece can remove go into in the joint groove 341, through the cooperation of arc piece and joint groove 341, make the axial clearance of silk member 340 reduce, the effectual locking difficult problem in axial that solves heavily loaded lead screw transmission.

Further, as shown in fig. 4 and 5, one surface of the arc block facing the first bearing 330 is a first plane, one surface of the arc block facing the first fastening member 450 is a first inclined surface, a first groove wall surface of the catching groove 341 close to the first bearing 330 is parallel to the first plane, a second groove wall surface of the catching groove 341 far from the first bearing 330 is inclined toward the first fastening member 450 to form a second inclined surface, and the first inclined surface is parallel to the second inclined surface. Through the arrangement of the inclined plane, the arc-shaped block and the clamping groove 341 of the wire rod piece 340 form a wedge-shaped structure, and then the anti-loosening assembly is adopted to apply certain pre-pressure to press the arc-shaped block, so that the arc-shaped block is firmly clamped in the clamping groove 341.

In addition, as shown in fig. 6, after the arc-shaped block is clamped in the clamping groove 341, the first inclined surface is attached to the second inclined surface, the first plane is attached to the first bearing 330, a gap 600 is formed between the first groove wall surface and the first plane, and the distance between the first groove wall surface and the first plane is 0.1-0.2 mm, so as to pre-press the arc-shaped block. After the first inclined plane of the arc-shaped block slowly moves to the second inclined plane for fitting, the first plane is slowly fitted with the first bearing 330, the first inclined plane is matched with the first plane to realize zero clearance looseness of the screw rod piece 340 in the axial direction, and prepressure applied by the anti-loosening assembly acts on the arc-shaped block to ensure that the arc-shaped block cannot generate looseness in the radial direction, so that the arc-shaped block is firmly clamped with the input end of the screw rod piece 340, the distance between the first groove wall surface and the first plane is 0.1-0.2 mm, the allowance of 0.1-0.2 mm is enough for the clamping groove 341 and the arc-shaped block to be well clamped together under the condition of larger processing tolerance, and the arc-shaped block can be prevented from being clamped in the clamping groove 341. When the prepressing force is further improved, the arc-shaped block can be continuously clamped into the clamping groove 341, and in addition, if the arc-shaped block and the clamping groove 341 are loosened or abraded due to long-time operation, the arc-shaped block is further pre-tightened, so that the arc-shaped block is further clamped into the clamping groove 341 to realize quick maintenance.

In some embodiments, as shown in fig. 5, a clearance groove 451 is formed in a side of the first fastener 450 facing the first bearing 330, the second fastener 430 is located in the clearance groove 451, a depth of the clearance groove 451 is greater than a thickness of the second fastener 430, the clearance groove 451 can reduce and increase an influence of the anti-loose assembly on an original design size, an axial anti-loose problem of the heavy-duty screw transmission device can be achieved without changing the original design size, a large axe does not need to be changed on the whole screw transmission device, and maintenance is facilitated while cost is saved.

In some embodiments, as shown in fig. 5, the anti-loosening assembly includes a plurality of third fastening members 420 and a plurality of fourth fastening members 440, the plurality of third fastening members 420 are threadedly connected to the first fastening member 450 and can move to abut against the side surface of the second fastening member 430, the plurality of fourth fastening members 440 are threadedly connected to the first fastening member 450 and can move to abut against the side surface of the second fastening member 430 away from the first bearing 330, the plurality of third fastening members 420 abut against the side surface of the second fastening member 430, so that the second fastening member 430 maintains the clamping state with the clamping groove 341, and the plurality of fourth fastening members 440 abut against the side surface of the second fastening member 430 away from the first bearing 330, so that the second fastening member 430 maintains the clamping state with the first bearing 330, and simultaneously applies a pre-pressure to the second fastening member 430 in the axial direction of the screw member 340, and can further increase the static friction force between the arc-shaped blocks and the first bearing 330, thereby ensuring that the arc-shaped blocks and the clamping groove 341 do not loosen, and further loosening the bearing occurs.

Further, the plurality of third fastening members 420 are arranged on the first fastening members 450 in a circumferential array, and extension lines of the moving directions of the plurality of first fastening members 450 intersect with the central axis of the screw member 340, that is, extension lines of pre-pressure applied to the first fastening members 450 by the first fastening members 450 intersect with the central axis of the screw member 340, so that the arc-shaped blocks can be firmly clamped with the clamping grooves 341. The plurality of fourth fastening members 440 are arranged in a circumferential array on the first fastening member 450, the moving direction of the fourth fastening members 440 is parallel to the central axis of the wire rod member 340, i.e. the direction of the pre-pressure applied to the first fastening member 450 by the fourth fastening members 440 is perpendicular to the moving direction of the arc-shaped block, and the pre-pressure applied to the second fastening member 430 by the fourth fastening members 440 can balance the forces applied to the wire rod during the static state of the bearing which can counteract the partial weight of the gravity part.

In other embodiments, when the third fastening members 420 are pre-tightened, the torque of the third fastening members 420 is pre-tightened according to the torque input to the input end, so that the pre-tightening torque of the first bearing 330 is 5% to 10% of the torque input to the input end, wherein the torque applied to each third fastening member 420 is the same, so that the stress of the second fastening member 430 in each direction is balanced, specifically, the third fastening members 420 act on the arc-shaped blocks with a certain pre-tightening force, the arc-shaped blocks are clamped with the wedge-shaped structures of the clamping grooves 341 so that the arc-shaped blocks act on the first bearing 330 with a certain torque, and it is ensured that the first bearing 330 can balance the force acting on the screw rod during movement with a certain partial weight of the gravity component under the action of pressure, and the bearing can be effectively prevented from loosening.

In other embodiments, the first fastening member 450 is provided with a threaded hole matching with the third fastening member 420, the threaded hole is further provided with a fifth fastening member 410, the fifth fastening member 410 is in threaded connection with the threaded hole and abuts against the third fastening member 420, and a layer of anti-loosening protection is added to the fifth fastening member 410 to ensure that the third fastening member 420 is not easily loosened under the condition of heavy load of the screw rod, so that the arc-shaped block is loosened to cause the bearing to be loosened axially, wherein the third fastening member 420, the fourth fastening member 440 and the fifth fastening member 410 are all machine-meter screws.

The embodiment further provides a method for preventing looseness of a bearing, which adopts the anti-loose structure for preventing looseness of the bearing, and the method comprises the following steps:

s1, respectively installing two first bearings 330 into the object placing cavities at two ends of the fixed seat 310, and ensuring that the first bearings 330 abut against the bottoms of the object placing cavities;

s2, the input end of the wire rod piece 340 enters the object placing cavity at one end of the fixed seat 310 and extends into the object placing cavity at the other end of the fixed seat 310, the first bearing 330 is sleeved on the input end, and the wire rod piece 340 abuts against the first bearing 330 in the object placing cavity;

s3, clamping the second fastening piece 430 at the input end, installing the first fastening piece 450 at the free end of the input end, screwing the first fastening piece 450 until the first fastening piece 450 moves to press against the first bearing 330 in the placement cavity, and continuing to screw 0.5-1.5 circles of the first fastening piece 450 after the first fastening piece 450 moves to press against the first bearing 330 in the placement cavity;

and S4, mounting the anti-loose assembly on the first fastening piece 450, and pressing the anti-loose assembly against the second fastening piece 430 with a certain pre-pressure.

Compared with the prior art, the heavy-duty lead screw transmission device is simple and reliable in structure and uncomplicated in installation process, the axial anti-loosening problem of the heavy-duty lead screw transmission device can be effectively solved only by adding the second fastening piece 430 and the anti-loosening assembly, even if threads are worn or loosened in subsequent long-time use, disassembly and maintenance are convenient, meanwhile, the pre-pressure can be adjusted according to needs, the reasonable pre-pressure is balanced with the force which enables the bearing to offset part of the weight of the gravity part and acts on the lead screw, and the design is simple and reliable.

In conclusion, the utility model provides a locking structure for preventing the bearing from loosening can effectively overcome the difficult problem that thrust output of tens of tons of reciprocating motion causes the axial loosening of the thrust bearing in the screw rod transmission device; meanwhile, the designed anti-loosening member can adjust the pre-pressure according to the requirement, so that the thrust bearing obtains the required pre-pressure to eliminate the gap of the thrust bearing, and in addition, the reasonable pre-pressure can be utilized to balance with part of the weight of the gravity part.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. The utility model provides a prevent not hard up anti loosening structure of bearing which characterized in that: comprises that

The bearing comprises a fixed seat (310), wherein two ends of the fixed seat (310) are respectively provided with a storage cavity, and a first bearing (330) is placed in each of the two storage cavities;

the screw rod piece (340), the screw rod piece (340) comprises a screw rod body and an input end which are connected with each other, the input end enters from the object placing cavity at one end of the fixing seat (310) and extends into the object placing cavity at the other end of the fixing seat (310), the first bearing (330) is sleeved on the input end, one end, far away from the screw rod body, of the input end is provided with a first fastening piece (450), the first fastening piece (450) is in threaded connection with the input end and can move to abut against the first bearing (330) in the object placing cavity, and the screw rod piece (340) abuts against the first bearing (330) in the object placing cavity; and

the anti-loosening component comprises a second fastener (430) and an anti-loosening assembly, the second fastener (430) is arranged between the first bearing (330) and the first fastener (450), the second fastener (430) is connected with the input end in a clamping mode, the anti-loosening assembly is arranged on the first fastener (450), and pre-pressure provided by the anti-loosening assembly acts on the second fastener (430).

2. The anti-loosening structure for preventing the bearing from loosening as claimed in claim 1, wherein: second fastener (430) include two arc pieces that are formed by the cutting of same ring, be provided with on the input with arc piece matched with joint groove (341), two arc pieces are followed the both sides card of joint groove (341) is gone into behind joint groove (341), two have the clearance between the tip of arc piece.

3. The looseness prevention structure for preventing a bearing from loosening according to claim 2, wherein: the one side of arc piece orientation first bearing (330) is first plane, the arc piece orientation the one side of first fastener (450) is first inclined plane, joint groove (341) are close to the first groove wall face of first bearing (330) with first plane is parallel, joint groove (341) are kept away from the second groove wall face orientation of first bearing (330) first fastener (450) slope is in order to form the second inclined plane, first inclined plane is parallel the second inclined plane.

4. The looseness prevention structure for preventing a bearing from loosening according to claim 3, wherein: the arc-shaped block is clamped behind the clamping groove (341), the first inclined plane is attached to the second inclined plane, the first plane is attached to the first bearing (330), and the distance between the first plane and the first groove wall surface is 0.1-0.2 mm.

5. The loosening prevention structure for a bearing according to any one of claims 1 to 4, wherein: a clearance groove (451) is formed in one side, facing the first bearing (330), of the first fastening piece (450), the second fastening piece (430) is located in the clearance groove (451), and the depth of the clearance groove (451) is larger than the thickness of the second fastening piece (430).

6. The loosening prevention structure for a bearing according to any one of claims 1 to 4, wherein: the anti-loosening assembly comprises a plurality of third fasteners (420) and a plurality of fourth fasteners (440), the plurality of third fasteners (420) are in threaded connection with the first fastener (450) and can move to the side against the second fastener (430), and the plurality of fourth fasteners (440) are in threaded connection with the first fastener (450) and can move to the side against the second fastener (430) far away from the first bearing (330).

7. The looseness prevention structure for preventing loosening of a bearing according to claim 6, wherein: the plurality of third fastening members (420) are arranged on the first fastening members (450) in a circumferential array mode, extension lines of motion directions of the plurality of first fastening members (450) intersect at the central axis of the wire rod member (340), the plurality of fourth fastening members (440) are arranged on the first fastening members (450) in a circumferential array mode, and the motion directions of the fourth fastening members (440) are parallel to the central axis of the wire rod member (340).

8. The looseness prevention structure for preventing a bearing from loosening according to claim 6, wherein: and pre-tightening the torque of the third fastening piece (420) according to the torque input to the input end, so that the pre-tightening torque of the first bearing (330) is 5% -10% of the torque input to the input end, wherein the first bearing (330) is a thrust ball bearing, and a deep groove ball bearing (320) is further arranged between the first bearing (330) close to the first fastening piece (450) and the bottom of the storage cavity.

9. The looseness prevention structure for preventing a bearing from loosening according to claim 6, wherein: the first fastening piece (450) is provided with a threaded hole matched with the third fastening piece (420), a fifth fastening piece (410) is further arranged in the threaded hole, and the fifth fastening piece (410) is abutted against the third fastening piece (420).

10. The looseness prevention structure for preventing loosening of a bearing according to claim 9, wherein: the third fastener (420), the fourth fastener (440), and the fifth fastener (410) are all machine-meter screws.

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