CN218462080U - Inner bearing pull-out ware - Google Patents

Abstract

The utility model provides an inner bearing pull-out ware, include: a support beam; the screw rod is vertically arranged on the middle part of the support beam in a penetrating manner and is in threaded connection with the middle part of the support beam; the at least two support rods are symmetrically arranged on the side part of the support beam by taking the screw rod as a center, are fixedly connected with the support beam along the vertical direction and are in sliding connection along the radial direction of the support beam; the expansion heads are detachably arranged at the lower parts of the support rods, the lower parts of the expansion heads are of spherical structures with adjustable diameters, extend into the gaps between the inner ring and the outer ring of the bearing and are abutted and matched with the end surfaces of the inner ring and the outer ring of the bearing; the pressure of the screw rod on the bearing seat reacts on the two support rods, the two support rods are pulled upwards, and the expansion head is driven upwards, so that the bearing is pulled out; the diameter of the spherical structure at the lower part of the expansion head can be adjusted to match the diameter of the ball of different bearings, so that the requirement of pulling up the bearings in multiple sizes can be met.

Description

Inner bearing pull-out ware

Technical Field

The utility model relates to an instrument especially relates to an inner bearing pull-out ware.

Background

The traditional bearing is disassembled by manual means such as hammering by an iron hammer, chiseling by a drill rod and the like, and the traditional bearing has the defects that the surfaces of a shaft and a bearing are damaged, and meanwhile, manual operation is labor-consuming and time-consuming and low in efficiency.

The utility model patent with application number CN202011490324.X discloses an inside and outside extraction tool of bearing, its technical scheme is: "including the plectane, the lower extreme fixedly connected with circle roller of plectane, the upper end fixedly connected with lantern ring of plectane, the top of the lantern ring is provided with the upper plate, the lower annular has been seted up to the lower surface of upper plate, and the lantern ring setting is cylindricly, the upper end of lantern ring is rotated and is connected in the inside of lower annular, the equal swing joint in the outside left and right sides of plectane has pulls out the crown block, every pulls out the crown block and all includes rectangular slab and bull stick, bull stick fixed connection is on the lateral wall of plectane, the through-hole has been seted up to the inside of rectangular slab, the rectangular slab cup joints in the outside of bull stick through the through-hole activity, and the one end fixedly connected with baffle of plectane is kept away from to the bull stick, and the surface of baffle and rectangular slab is laminated mutually, the rectangular slab is close to one side fixedly connected with outer wane of plectrum, outer wane setting is including being the triangle form, two pull up and be provided with the mechanism between the crown block; although the bearing inner and outer extractor can realize safe and efficient extraction of the bearing, the bearing inner and outer extractor has the following defects:

1. the space in the equipment where the bearing is located is narrow, the external space of the bearing may not be enough to accommodate the external warping plate, namely, the external warping plate may not extend into the lower part of the bearing to pull up the bearing;

2. when the outer rocker is pulled up, force acts on the outside of the bearing, and the bearing is possibly further damaged because the force is different from the stress surface of the bearing under the actual working condition;

3. the sizes of the inner ring, the outer ring and the ball of the bearings with different sizes are not consistent, and the existing bearing puller cannot simultaneously meet the pulling requirements of the bearings with various sizes.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide an inner bearing pull-out ware for there is the difference to cause the bearing to further damage, can't satisfy the problem that many sizes bearing pulled out the demand simultaneously with the operating condition when solving the unable suitable, the pull-out of the conventional pull-out ware of space local promotion among the prior art bearing stress surface and operating condition.

To achieve the above and other related objects, the present invention provides an inner bearing extractor, comprising:

a support beam;

the screw rod is vertically arranged in the middle of the support beam in a penetrating manner, and is vertically arranged with the support beam and in threaded connection with the middle of the support beam;

the at least two support rods are symmetrically arranged on the side part of the support beam by taking the screw rod as a center, are fixedly connected with the support beam along the vertical direction and are in sliding connection along the radial direction of the support beam;

the expansion head can be detachably arranged on the lower part of each support rod, the lower part of the expansion head is of a spherical structure with adjustable diameter, and the expansion head extends into the gap between the inner ring and the outer ring of the bearing and is matched with the end face of the inner ring and the outer ring of the bearing in an abutting mode.

By adopting the technical scheme, the spherical structure at the lower part of the expansion head extends into a gap between adjacent balls between the inner ring and the outer ring of the bearing, the lower part of the lead screw extends into the inner ring of the bearing, the lead screw rotates downwards, the pressure of the lead screw on the bearing seat after bottoming is reacted on the two support rods, the tension is upward to the direction of the two support rods, and the expansion head is driven to move upwards, so that the bearing is pulled out; the bearing can be pulled up by utilizing the clearance space between the inner ring and the outer ring of the bearing, no additional space is needed, the limitation of the space size of equipment where the bearing is positioned is avoided, and the requirement of pulling up the bearing in the equipment with narrow space can be met; in the process of pulling the bearing, the spherical structure of the lower part of the expansion head extending into the gap between the inner ring and the outer ring of the bearing is similar to the shape of the ball, and can be analogized in that a new ball is inserted into the gap between the inner ring and the outer ring of the bearing, namely the stress condition of the bearing during the pulling of the bearing is similar to the stress condition of the bearing under the actual working condition of the bearing, so that the bearing can not be further damaged, and the safety of the bearing during the pulling of the bearing is improved; simultaneously, when facing not unidimensional bearing, can match the interior outer lane diameter size of different bearings through outside or inside slip vaulting pole, can match the ball diameter size of different bearings through the spherical structure diameter of adjustment inflation head lower part, can satisfy many sizes simultaneously and play the pull-out demand of bearing, reduced the time of changing puller or puller part, reduced material cost, improved work efficiency.

In an embodiment of the present invention, the expansion head includes: the connecting column is arranged on the upper part of the expansion head and is in threaded connection with the lower part of the stay bar; the expansion plug is arranged below the connecting column and is in threaded connection with the lower part of the connecting column, and an expansion table with a narrow upper part and a wide lower part is arranged at the lower part of the expansion plug; the limiting ring is sleeved in the middle of the expansion plug and is in sliding connection with the expansion plug; the expansion arms are symmetrically arranged below the limiting ring and hinged with the limiting ring, and each expansion arm is abutted against the outer side of the expansion table, supported by the expansion table and expanded outwards; the hemispherical heads are arranged at the lower parts of the expansion arms, and the hemispherical heads positioned at the lower parts of different expansion arms are combined to form a complete sphere; the first locking nut is sleeved on the upper portion of the expansion plug and in threaded connection with the upper portion of the expansion plug, and is located above the limiting ring, and the lower end face of the first locking nut is abutted to the upper end face of the limiting ring and limits the expansion plug to move downwards relative to the limiting ring.

By adopting the technical scheme, the expansion plug is pulled upwards, the expansion table is driven to move upwards, so that the expansion arm is further expanded outwards, the distance between the two hemispherical heads at the lower part of the expansion arm is increased, namely the diameter of the joint of the spherical structure of the expansion head extending into the gap between the inner ring and the outer ring of the bearing and the joint of the inner ring and the outer ring is increased, when the specified size is reached, the first locking nut is rotated so as to limit the expansion plug to move downwards relative to the limiting ring, and the size of the bearing ball matched with different diameters can be met; can stretch into the bearing inner and outer lane clearance with expansion head lower part with minimum diameter earlier during the use, increase spherical structure diameter again in order to match bearing ball diameter, prevent that the expansion head after the inflation can't normally insert.

In an embodiment of the present invention, each of the expansion arms is symmetrically provided with a storage groove, and the storage grooves located at the inner sides of the different expansion arms are combined to form a complete groove matched with the shape of the expansion platform.

Through adopting above-mentioned technical scheme, when putting the expansion table into the complete groove that two put the thing groove forms completely, two hemispherical heads make up and form one and accomplish spherically, promptly this moment the minimum diameter of the spherical structure in the outer lane clearance of expansion head stretches into the bearing.

In an embodiment of the present invention, the outer sidewall of the limiting ring is symmetrically provided with at least two side end faces, and two corresponding side end faces are parallel to each other.

Through adopting above-mentioned technical scheme, can stretch into the back in the bearing inner and outer lane clearance in expansion head lower part, use the spanner to borrow power and two side end faces will expand the head and rotate to two hemisphere heads and be close to the inner and outer lane of bearing respectively, increase spherical structure diameter again in order to match bearing ball diameter.

In an embodiment of the present invention, the supporting beam is in a straight shape, and the screw rod is located at the center of the supporting beam; the supporting beam is provided with sliding grooves which penetrate through the supporting beam from top to bottom in a symmetrical mode, the straight line where the sliding direction is located passes through the center of the supporting beam, the upper portion of the supporting rod is connected with the sliding grooves in a sliding mode, and the lower portion of the supporting rod penetrates through the sliding grooves and extends towards the lower portion of the sliding grooves.

Through adopting above-mentioned technical scheme, form the two expansion head structures of a style of calligraphy, the interval between two expansion heads is adjusted along with bearing inner and outer lane diameter.

In an embodiment of the present invention, the supporting beam is in a herringbone shape, and the screw rod is located at the center of the supporting beam; the supporting beam side part is uniformly provided with up-down through sliding grooves along the supporting beam center symmetrically, the straight line of the sliding direction passes through the supporting beam center, the upper part of the supporting rod is connected with the sliding grooves in a sliding mode, and the lower part of the supporting rod penetrates through the sliding grooves and extends to the lower part of the sliding grooves.

Through adopting above-mentioned technical scheme, form three expansion head structure of chevron-shaped, the interval between the three expansion head is adjusted along with bearing inner and outer lane diameter, when facing great bearing, three expansion head structure's stability is better to stability when having improved the bearing and having pulled out.

In an embodiment of the present invention, the supporting beam includes: the base is positioned in the middle of the supporting beam and is in threaded fit with the screw rod, and the supporting arms are detachably arranged on the side part of the base; the base is provided with three first slots, each first slot is symmetrically arranged with the center of the base, and one side of one first slot, which is back to the center of the base, is symmetrically provided with a second slot; each first slot and second slot lower part are sealed, the support arm is pegged graft with first slot or second slot and is cooperated, is provided with the spout that runs through from top to bottom on each support arm, and the straight line that slip direction was located passes through a supporting beam center, vaulting pole upper portion and spout sliding connection, the lower part runs through the spout and extends to the spout below.

By adopting the technical scheme, a double-expansion head structure or a three-expansion head structure can be selected according to actual requirements, if the double-expansion head structure is required, one supporting arm is arranged in the second slot, the other supporting arm is arranged in the first slot opposite to the second slot, and if the three-expansion head structure is required, the supporting arms are respectively arranged in the three first slots; the method can meet the requirements of different use scenes, and improves the flexibility in different use scenes.

In an embodiment of the present invention, the supporting rod includes: the limiting platform is formed by the threaded part and the end surface of the rod body; the lower part of the rod body part is in threaded connection with the expansion head; the screw thread portion runs through the sliding groove, a second locking nut which is abutted to the upper end face of the sliding groove is arranged on the upper portion of the screw thread portion in a threaded mode, and the upper end face of the limiting table is abutted to the lower end face of the sliding groove.

By adopting the technical scheme, after the second locking nut is loosened, the distance between the support rod and the lead screw can be adjusted, and after the adjustment is finished, the second locking nut is locked again, so that the fixation can be finished again.

In an embodiment of the present invention, the lower portion of the screw rod is detachably provided with a ball head ejector rod, and the ball head ejector rod is connected to the lower portion of the screw rod by a thread.

By adopting the technical scheme, the ball head ejector rods with different thicknesses can be selected according to the inner diameter of the bearing inner ring, so that the adaptability to bearings with different sizes is further improved.

As described above, the utility model discloses an inner bearing pull-out ware has following beneficial effect:

1. the bearing can be pulled up by utilizing the clearance space between the inner ring and the outer ring of the bearing, no additional space is needed, the limitation of the space size of equipment where the bearing is positioned is avoided, and the requirement of pulling up the bearing in the equipment with narrow space can be met;

2. in the process of pulling the bearing, the spherical structure of the lower part of the expansion head extending into the gap between the inner ring and the outer ring of the bearing is similar to the shape of the ball, and can be analogized in that a new ball is inserted into the gap between the inner ring and the outer ring of the bearing, namely the stress condition of the bearing during the pulling of the bearing is similar to the stress condition of the bearing under the actual working condition of the bearing, so that the bearing can not be further damaged, and the safety of the bearing during the pulling of the bearing is improved;

3. the diameter of the spherical structure at the lower part of the expansion head can be adjusted to match the diameter of the ball of different bearings, so that the multi-size bearing pulling requirements can be met, the time for replacing a puller or a puller part is reduced, the material cost is reduced, and the working efficiency is improved;

4. can select for use two expansion head structures or three expansion head structure according to actual demand, can adapt to the demand of different use scenes, improve the flexibility under facing different use scenes.

Drawings

Fig. 1 is a front view of an inner bearing extractor disclosed in a first embodiment of the present invention.

Fig. 2 is a partial enlarged view of an expansion head of an inner bearing extractor disclosed in the first embodiment of the present invention.

Fig. 3 is a partially enlarged view of a supporting rod of an inner bearing extractor disclosed in the first embodiment of the present invention.

Fig. 4 is a top view of an inner bearing extractor disclosed in the first embodiment of the present invention.

Fig. 5 is a top view of an inner bearing extractor according to a second embodiment of the present invention.

Fig. 6 is a top view of an inner bearing extractor with a three-expansion head structure according to a third embodiment of the present invention.

Fig. 7 is a top view of an inner bearing extractor with a double expansion head structure according to a third embodiment of the present invention.

Description of the reference numerals

1-a support beam; 11-a base; 111-a first slot; 112-a second slot; 12-a support arm; 13-a chute; 2-a screw rod; 21-ball head ejector rod; 3-a brace rod; 31-a threaded portion; 32-a shaft portion; 33-a limit table; 34-a second lock nut; 4-an expansion head; 41-connecting column; 42-an expansion plug; 43-an expansion stage; 44-a stop collar; 45-expansion arms; 451-storage groove; 46-hemispherical head; 47-first locking nut.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 7. It should be understood that the structure, proportion, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention does not have the substantial technical significance, and the modification of any structure, the change of the proportion relation or the adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Example one

Referring to fig. 1-4, the present invention provides an inner bearing extractor, including:

a support beam 1;

the screw rod 2 is vertically arranged in the middle of the support beam 1 in a penetrating manner, and the screw rod 2 is vertical to the support beam 1 and is in threaded connection with the middle of the support beam 1;

the at least two support rods 3 are symmetrically arranged at the side part of the support beam 1 by taking the screw rod 2 as a center, are fixedly connected with the support beam 1 along the vertical direction and are in sliding connection along the radial direction of the support beam 1;

the expansion heads 4 are detachably arranged at the lower parts of the support rods 3, the lower parts of the expansion heads 4 are of spherical structures with adjustable diameters, extend into the gaps between the inner ring and the outer ring of the bearing and are abutted and matched with the end surfaces of the inner ring and the outer ring of the bearing;

the spherical structure at the lower part of the expansion head 4 extends into a gap between adjacent balls between the inner ring and the outer ring of the bearing, the lower part of the screw rod extends into the inner ring of the bearing, the screw rod 2 rotates downwards, the pressure of the screw rod on the bearing seat after bottoming is reacted on the two support rods 3, the two support rods 3 are pulled upwards, and the expansion head 4 is driven upwards, so that the bearing is pulled out; the bearing can be pulled up by utilizing the clearance space between the inner ring and the outer ring of the bearing, no additional space is needed, the limitation of the space size of equipment where the bearing is positioned is avoided, and the requirement of pulling up the bearing in the equipment with narrow space can be met; in the process of pulling the bearing, the spherical structure of the lower part of the expansion head 4 extending into the gap between the inner ring and the outer ring of the bearing is similar to the shape of the ball, and can be analogized in that a new ball is inserted into the gap between the inner ring and the outer ring of the bearing, namely the stress condition of the bearing during the pulling of the bearing is similar to the stress condition under the actual working condition of the bearing, so that the bearing can not be further damaged, and the safety of the bearing during the pulling of the bearing is improved; simultaneously, when facing not unidimensional bearing, can match the interior outer lane diameter size of different bearings through outside or inside slip vaulting pole 3, can match the ball diameter size of different bearings through the spherical structure diameter of adjustment inflation head 4 lower part, can satisfy many sizes of bearing simultaneously and pull up the demand, reduced the time of changing puller or puller part, reduced material cost, improved work efficiency.

The expansion head 4 comprises: the connecting column 41 is arranged at the upper part of the expansion head 4 and is in threaded connection with the lower part of the stay bar 3; the expansion plug 42 is arranged below the connecting column 41 and is in threaded connection with the lower part of the connecting column 41, and the lower part of the expansion plug 42 is provided with an expansion table 43 with a narrow upper part and a wide lower part; the limiting ring 44 is sleeved in the middle of the expansion plug 42 and is connected with the expansion plug 42 in a sliding manner; the expansion arms 45 are symmetrically arranged below the limiting ring 44 and hinged with the limiting ring 44, and each expansion arm 45 is abutted against the outer side of the expansion platform 43, supported by the expansion platform 43 and expanded outwards; the hemispherical heads 46 are arranged at the lower parts of the expansion arms 45, and the hemispherical heads 46 positioned at the lower parts of the different expansion arms 45 are combined to form a complete sphere; the first locking nut 47 is sleeved on the upper part of the expansion plug 42, is in threaded connection with the upper part of the expansion plug 42 and is positioned above the limiting ring 44, and the lower end face of the first locking nut 47 is abutted against the upper end face of the limiting ring 44 and limits the expansion plug 42 to move downwards relative to the limiting ring 44; the expansion plug 42 is pulled upwards, the expansion table 43 is driven to move upwards, so that the expansion arm 45 is further expanded outwards, the distance between the two hemispherical heads 46 at the lower part of the expansion arm 45 is increased, namely the diameter of the joint of the spherical structure of the expansion head 4 extending into the gap between the inner ring and the outer ring of the bearing and the joint of the inner ring and the outer ring is increased, when the specified size is reached, the first locking nut 47 is rotated, so that the expansion plug 42 is limited to move downwards relative to the limiting ring 44, and the size of the bearing balls with different diameters can be matched; can stretch into the bearing inner and outer lane clearance with expansion head 4 lower part with minimum diameter earlier during the use, increase spherical structure diameter again in order to match bearing ball diameter, prevent that expansion head 4 after the inflation can't normally insert.

The inner sides of the expansion arms 45 are symmetrically provided with object placing grooves 451, and the object placing grooves 451 positioned at the inner sides of the different expansion arms 45 are combined to form a complete groove matched with the shape of the expansion table 43; when the expansion table 43 is completely placed in the complete groove formed by the two placing grooves 451, the two hemispherical heads 46 are combined to form a complete sphere, which is the minimum diameter of the spherical structure of the expansion head 4 extending into the gap between the inner ring and the outer ring of the bearing.

At least two side end faces are symmetrically arranged on the outer side wall of the limiting ring 44, and every two corresponding side end faces are parallel to each other; after the lower part of the expansion head 4 extends into the gap between the inner ring and the outer ring of the bearing, the expansion head 4 is rotated to the two hemispherical heads 46 which are respectively close to the inner ring and the outer ring of the bearing by using a wrench with the aid of force and two side end surfaces, and the diameter of the spherical structure is increased to match the diameter of the bearing ball.

The supporting beam 1 is in a straight line shape, and the screw rod 2 is positioned at the center of the supporting beam 1; sliding grooves 13 which penetrate through the supporting beam 1 up and down are symmetrically arranged on two sides of the supporting beam 1, the straight line of the sliding direction passes through the center of the supporting beam 1, the upper part of the stay bar 3 is connected with the sliding grooves 13 in a sliding manner, and the lower part of the stay bar penetrates through the sliding grooves 13 and extends below the sliding grooves 13; a linear double expansion head 4 structure is formed, and the distance between the two expansion heads 4 is adjusted along with the diameters of the inner ring and the outer ring of the bearing.

The stay 3 includes: a screw thread part 31 positioned at the upper part of the stay bar 3, a bar body part 32 positioned at the middle lower part of the stay bar 3, and a limit table 33 formed by the screw thread part 31 and the end surface of the bar body part 32; the lower part of the rod body part 32 is connected with the expansion head 4 through screw threads; the screw thread part 31 penetrates through the sliding groove 13, a second locking nut 34 abutted with the upper end face of the sliding groove 13 is arranged on the upper portion of the screw thread part 31 in a threaded mode, and the upper end face of the limiting table 33 is abutted with the lower end face of the sliding groove 13; after the second locking nut 34 is loosened, the distance between the support rod 3 and the screw rod 2 can be adjusted, and after the adjustment is finished, the second locking nut 34 is locked, and then the fixation can be finished again.

The lower part of the screw rod 2 is detachably provided with a ball head ejector rod 21, the ball head ejector rod 21 is in threaded connection with the lower part of the screw rod 2, the ball head ejector rods 21 with different thicknesses can be selected according to the inner diameter of the bearing inner ring, and the adaptability to bearings with different sizes is further improved.

The utility model discloses an inner bearing pull-out ware's application method does:

a. the spherical structure at the lower part of the expansion head 4 extends into the gap between the inner ring and the outer ring of the bearing and rotates until the two hemispherical heads 46 are respectively close to the inner ring and the outer ring;

b. the expansion plug 42 is pulled upwards, the expansion table 43 is driven to move upwards, the expansion arm 45 expands outwards, the distance between two hemispherical heads 46 at the lower part of the expansion arm 45 is increased, and when the specified size is reached, a first locking nut 47 is screwed to fix the expansion arm 45;

c. screwing the connecting column 41 on the upper part of the expansion plug 42, and screwing the stay bar 3 on the upper part of the connecting column 41 after screwing;

d. keeping the stay bars 3 in the vertical direction all the time, inserting the thread part 31 at the upper part of each stay bar 3 into the corresponding sliding groove 13 in a penetrating way, and screwing the second locking nut 34 to fix the stay bar 3;

e. the rotary screw rod 2 moves downwards, the rotary screw rod continues to rotate slowly downwards after bottoming, the pressure of the screw rod 2 on the bearing seat reacts on the two support rods 3, the support rods 3 are pulled upwards, the expansion head 4 is driven to move upwards, and the bearing is pulled out.

The utility model discloses an inner bearing pull-out ware's theory of operation does: the pressure of the lead screw on the bearing seat reacts on the two support rods 3, the lead screw presents a tensile force which is upward to the directions of the two support rods 3, and drives the expansion head 4 to be upward to pull out the bearing; in the process of pulling the bearing, the spherical structure of the lower part of the expansion head 4 extending into the gap between the inner ring and the outer ring of the bearing is similar to the shape of the ball, and can be analogized in that a new ball is inserted into the gap between the inner ring and the outer ring of the bearing, namely the stress condition of the bearing during the pulling of the bearing is similar to the stress condition under the actual working condition of the bearing, so that the bearing can not be further damaged, and the safety of the bearing during the pulling of the bearing is improved; simultaneously, when facing not unidimensional bearing, can match the interior outer lane diameter size of different bearings through outside or inside slip vaulting pole 3, can match the ball diameter size of different bearings through the spherical structure diameter of adjustment inflation head 4 lower part, can satisfy many sizes of bearing simultaneously and pull up the demand.

Example two

Referring to fig. 5, the difference between the present embodiment and the first embodiment is: the supporting beam 1 is in a herringbone shape, and the screw rod 2 is positioned in the center of the supporting beam 1; the side part of the supporting beam 1 is symmetrically and uniformly provided with a sliding chute 13 which penetrates through the supporting beam from top to bottom along the center of the supporting beam 1, the straight line of the sliding direction passes through the center of the supporting beam 1, the upper part of the brace rod 3 is connected with the sliding chute 13 in a sliding way, and the lower part of the brace rod penetrates through the sliding chute 13 and extends to the lower part of the sliding chute 13; a herringbone three-expansion-head 4 structure is formed, the distance between the three expansion heads 4 is adjusted along with the diameter of the inner ring and the outer ring of the bearing, and when a larger bearing is faced, the stability of the three-expansion-head 4 structure is better, so that the stability of the bearing during pulling is improved.

EXAMPLE III

Referring to fig. 6 to fig. 7, the difference between the present embodiment and the first embodiment is: the support beam 1 includes: the screw-thread-matched support device comprises a base 11 positioned in the middle of a support beam 1 and in thread fit with a screw rod 2, and a plurality of support arms 12 detachably arranged on the side parts of the base 11; three first slots 111 are arranged on the base 11, each first slot 111 is symmetrically arranged with respect to the center of the base 11, and one side of one first slot 111, which faces away from the center of the base 11, is symmetrically provided with a second slot 112; the lower parts of the first slot 111 and the second slot 112 are sealed, the support arm 12 is in inserted fit with the first slot 111 or the second slot 112, a chute 13 which penetrates through the support arm 12 up and down is arranged on each support arm 12, the straight line of the sliding direction passes through the center of the support beam 1, the upper part of the support rod 3 is in sliding connection with the chute 13, and the lower part of the support rod penetrates through the chute 13 and extends towards the lower part of the chute 13; a double expansion head 4 structure or a three expansion head 4 structure can be selected according to actual requirements, if the double expansion head 4 structure is required, one supporting arm 12 is arranged in the second slot 112, the other supporting arm 12 is arranged in the first slot 111 opposite to the second slot 112, and if the three expansion head 4 structure is required, the supporting arms 12 are respectively arranged in the three first slots 111; the method can meet the requirements of different use scenes, and improves the flexibility in different use scenes.

To sum up, the utility model can finish the bearing pulling operation by utilizing the clearance space between the inner ring and the outer ring of the bearing, does not need extra space, is not limited by the space size of the equipment where the bearing is positioned, and can meet the requirement of the bearing pulling in the equipment with narrow space; in the process of pulling the bearing out, the spherical structure of the lower part of the expansion head 4 extending into the gap between the inner ring and the outer ring of the bearing is similar to the shape of the ball, and can be analogized to inserting a new ball into the gap between the inner ring and the outer ring of the bearing, namely the stress condition of the bearing during pulling the bearing out is similar to the stress condition of the bearing under the actual working condition of working of the bearing, so that the bearing can not be further damaged, and the safety of pulling the bearing out is improved; the diameter of the spherical structure at the lower part of the expansion head 4 can be adjusted to match the diameter of the ball of different bearings, so that the multi-size bearing pulling requirements can be met, the time for replacing a puller or a puller part is reduced, the material cost is reduced, and the working efficiency is improved; can select for use two expansion head 4 structures or three expansion head 4 structures according to actual demand, can adapt to the demand of different use scenes, improve the flexibility in the face of under the different use scenes. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (9)

1. An inner bearing extractor, comprising:

a support beam (1);

the screw rod (2) is vertically arranged in the middle of the supporting beam (1) in a penetrating manner, and the screw rod (2) is perpendicular to the supporting beam (1) and is in threaded connection with the middle of the supporting beam (1);

the at least two support rods (3) are symmetrically arranged at the side part of the support beam (1) by taking the screw rod (2) as a center, are fixedly connected with the support beam (1) along the vertical direction and are in sliding connection along the radial direction of the support beam (1);

the expansion heads (4) are detachably arranged on the lower parts of the support rods (3), the lower parts of the expansion heads (4) are of spherical structures with adjustable diameters, and extend into the gaps between the inner ring and the outer ring of the bearing and are in butt joint with the end faces of the inner ring and the outer ring of the bearing.

2. An inner bearing extractor according to claim 1, wherein: the expansion head (4) comprises: the connecting column (41) is arranged at the upper part of the expansion head (4) and is in threaded connection with the lower part of the stay bar (3); the expansion plug (42) is arranged below the connecting column (41) and is in threaded connection with the lower part of the connecting column (41), and an expansion table (43) with a narrow upper part and a wide lower part is arranged at the lower part of the expansion plug (42); the limiting ring (44) is sleeved in the middle of the expansion plug (42) and is in sliding connection with the expansion plug (42); the expansion arms (45) are symmetrically arranged below the limiting ring (44) and hinged with the limiting ring (44), and each expansion arm (45) is abutted against the outer side of the expansion table (43), supported by the expansion table (43) and expanded outwards; the hemispherical heads (46) are arranged at the lower parts of the expansion arms (45), and the hemispherical heads (46) positioned at the lower parts of the different expansion arms (45) are combined to form a complete sphere; the first locking nut (47) is sleeved on the upper portion of the expansion plug (42), is in threaded connection with the upper portion of the expansion plug (42), and is located above the limiting ring (44), and the lower end face of the first locking nut (47) is abutted to the upper end face of the limiting ring (44) and limits the expansion plug (42) to move downwards relative to the limiting ring (44).

3. An inner bearing extractor according to claim 2, wherein: the inner sides of the expansion arms (45) are symmetrically provided with article placing grooves (451), and the article placing grooves (451) positioned on the inner sides of the different expansion arms (45) are combined to form a complete groove matched with the shape of the expansion table (43).

4. An inner bearing extractor according to claim 2, wherein: the outer side wall of the limiting ring (44) is symmetrically provided with at least two side end faces, and the two corresponding side end faces are parallel to each other.

5. An inner bearing extractor according to claim 1, wherein: the support beam (1) is in a straight line shape, and the screw rod (2) is positioned at the center of the support beam (1); supporting beam (1) bilateral symmetry is provided with spout (13) that run through from top to bottom, and the straight line that the slip direction was located passes through a supporting beam (1) center, vaulting pole (3) upper portion and spout (13) sliding connection, the lower part runs through spout (13) and extends to spout (13) below.

6. An inner bearing extractor according to claim 1, wherein: the support beam (1) is in a herringbone shape, and the screw rod (2) is positioned in the center of the support beam (1); a supporting beam (1) lateral part evenly is provided with spout (13) that run through from top to bottom along a supporting beam (1) central symmetry, and the straight line that the slip direction was located passes through a supporting beam (1) center, vaulting pole (3) upper portion and spout (13) sliding connection, the lower part runs through spout (13) and extends to spout (13) below.

7. An inner bearing extractor according to claim 1, wherein: the support beam (1) comprises: the screw rod (2) is arranged on the support beam (1) and comprises a base (11) which is positioned in the middle of the support beam (1) and is in threaded fit with the screw rod (2), and a plurality of support arms (12) which are detachably arranged on the side parts of the base (11); three first slots (111) are arranged on the base (11), each first slot (111) is arranged in a central symmetry mode of the base (11), and one side, back to the center of the base (11), of one first slot (111) is symmetrically provided with a second slot (112); each first slot (111) and second slot (112) lower part are sealed, support arm (12) and first slot (111) or second slot (112) are pegged graft the cooperation, are provided with spout (13) that run through from top to bottom on each support arm (12), and the straight line that the slip direction was located is through a supporting beam (1) center, vaulting pole (3) upper portion and spout (13) sliding connection, the lower part runs through spout (13) and extends to spout (13) below.

8. An inner bearing extractor according to claim 5, 6 or 7, wherein: the stay (3) comprises: a threaded part (31) positioned at the upper part of the stay bar (3), a bar body part (32) positioned at the middle lower part of the stay bar (3), and a limit table (33) formed by the threaded part (31) and the end surface of the bar body part (32); the lower part of the rod body part (32) is in threaded connection with the expansion head (4); the thread part (31) penetrates through the sliding groove (13), a second locking nut (34) abutted to the upper end face of the sliding groove (13) is arranged on the upper portion of the thread part (31) in a threaded mode, and the upper end face of the limiting table (33) is abutted to the lower end face of the sliding groove (13).

9. An inner bearing extractor according to claim 1, wherein: the lower part of the screw rod (2) is detachably provided with a ball head ejector rod (21), and the ball head ejector rod (21) is in threaded connection with the lower part of the screw rod (2).

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