CN211439798U - Puller device for disassembling bearing in square end cover of motor - Google Patents

Abstract

The utility model discloses a puller device for dismantling a bearing in a square end cover of a motor, which comprises an ejection screw, wherein the ejection screw ejects a bearing arranged in the square end cover, the ejection screw is in threaded fit with a nut and an internal thread sleeve from top to bottom, the nut and the internal thread sleeve are connected in a detachable way, and the nut and the internal thread sleeve synchronously rotate on the ejection screw; the bottom of the internal thread sleeve is provided with a four-claw puller assembly which can move up and down along with the internal thread sleeve in the ejection screw rod; the bottom of the ejection lead screw can be in contact with the outer ring of the end cover bearing, and four pull claws arranged on the four-claw pull horse assembly can be in contact with the bottom of the square end cover. The utility model discloses the damage of reducible bearing for the bearing reuse of dismantlement, thereby practice thrift the cost.

Description

Puller device for disassembling bearing in square end cover of motor

Technical Field

The utility model relates to a draw horse device for dismantling bearing in the square end cover of motor.

Background

With the development of science and technology, motors are applied to various industries, the dynamic balance requirement of the motors on rotors is very high, the bearing requirement performance is good, the bearing in the traditional motor is disassembled in an external knocking mode, so that bearing rolling bodies are abraded, and the disassembled bearing cannot be reused. The most used end cap bearing removal tool in the market at present is a three-jaw puller, but the three-jaw puller has the following problems: 1. the existing three-jaw puller is not suitable for a square end cover; 2. when the three-jaw draws the horse to draw the bearing, draw the claw and only play the effect of pinning the border, the bearing is rotatory ejecting through the middle part lead screw, and the lead screw can produce alternating load to the bearing when rotating, also can make the bearing receive the damage, the most import foreign countries in the motor inside the country at present, the bearing is expensive in addition, the bearing of dismantling out continues to use and can save a large amount of costs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above problem, a draw horse device for dismantling bearing in the square end cover of motor is provided, the damage of its reducible bearing for the bearing reuse of dismantlement, thereby practice thrift the cost.

In order to realize the above purpose, the utility model adopts the technical scheme that: a puller device for disassembling a bearing in a square end cover of a motor comprises an ejection screw, wherein the ejection screw ejects the bearing arranged in the square end cover, the ejection screw is in threaded fit with a nut and an internal thread sleeve from top to bottom, the nut and the internal thread sleeve are in detachable connection, and the nut and the internal thread sleeve synchronously rotate on the ejection screw; the bottom of the internal thread sleeve is provided with a four-claw puller assembly which can move up and down along with the internal thread sleeve in the ejection screw rod; the bottom of the ejection lead screw can be in contact with the outer ring of the end cover bearing, and four pull claws arranged on the four-claw pull horse assembly can be in contact with the bottom of the square end cover.

Preferably, the bottom end of the ejection screw rod is uniformly provided with three arc-shaped bulges in the circumferential direction, the inner diameter of each arc-shaped bulge is larger than that of the bearing outer ring, and the outer diameter of each arc-shaped bulge is smaller than that of the bearing outer ring.

Preferably, the four-jaw puller assembly comprises an annular puller seat, one end of four connecting rods is uniformly hinged to the outer wall of the annular puller seat, and the other end of each connecting rod is hinged to the upper part of one puller jaw.

Preferably, a plurality of hinge holes are formed in the pull claw in a penetrating mode, and one end of the connecting rod can be hinged to the hinge holes corresponding to different positions on the pull claw.

Preferably, the outer cylindrical surface of the internal thread sleeve is sleeved with the annular puller seat, a positioning shaft shoulder is arranged at the bottom of the outer cylindrical surface of the internal thread sleeve, and a thrust bearing is matched between the annular puller seat and the positioning shaft shoulder of the internal thread sleeve.

Preferably, the nut and the internal thread sleeve are connected through a taper pin, a plurality of through holes are uniformly formed in the end face of the nut in the circumferential direction around the screw hole, a plurality of taper holes corresponding to the first through holes are formed in the upper top face of the internal thread sleeve, and the taper pin penetrates through the through holes to be matched with the corresponding taper holes to enable the nut and the internal thread sleeve to be connected into a whole.

Preferably, a second through hole is formed in the thread side part at the top of the ejection screw rod, a cross rod is arranged in the second through hole, two ends of the cross rod are respectively connected with vertical rods which are vertically arranged, the vertical rods penetrate through two third through holes correspondingly formed in the top surface of the annular puller seat, and the annular puller seat can slide up and down along the two vertical rods.

The utility model has the advantages that:

1. the thrust bearing adopted by the invention is arranged between the positioning shaft shoulder of the internal thread sleeve and the puller seat, so that the puller only bears the axial force during working and cannot rotate, and the annular puller seat moves upwards to prevent the puller claw from rotating and unhooking.

2. The nut and the rotating ring are connected through the conical pin, the internal threads of the nut and the rotating ring are in threaded fit with the ejection lead screw, the nut and the rotating ring move upwards during work, the position of the ejection lead screw is unchanged, the square end cover is grabbed by the pull claw to move upwards, and therefore the bearing is ejected by the ejection lead screw and cannot be subjected to alternating load.

3. The pull claw used by the invention is provided with a plurality of hinge hole positions, and the hinge length of the pull claw can be adjusted to enlarge the application range of the device.

4. According to the invention, the top of the ejection screw is connected with the annular puller seat through the cross rod and the vertical rods arranged at the two ends of the cross rod, so that the puller seat can not rotate on one hand, and the ejection screw can be in a relatively fixed state on the other hand, and when the nut is screwed, the ejection screw can not rotate together under the action of a screwing force, thereby facilitating the screwing of the nut.

5. The bottom of the ejection screw rod is provided with three arc-shaped bulges, the end part of each arc-shaped bulge is in contact with the outer ring of the bearing, and the contact position is set as a dynamic balance point, so that the bearing can be synchronously stressed when being screwed out, and the bearing is prevented from being under the action of alternating load.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic perspective view of the present invention with the cross bar and the vertical bar removed;

FIG. 3 is a schematic perspective view of a four-jaw puller assembly according to the present invention;

FIG. 4 is a schematic perspective view of a top ring of the lead screw of the present invention;

fig. 5 is a perspective view of the rotating ring of the present invention.

In the figure: 1. ejecting a lead screw; 2. a nut; 21. a first through hole; 3. pulling a claw; 4. an annular puller seat; 5. a thrust bearing; 66. a square end cap; 67. a bearing; 7. a bolt; 8. an internally threaded sleeve; 81. a conical bore; 82. positioning the shaft shoulder; 9. A connecting rod; 11. an arc-shaped bulge; 12. a polish rod; 13. screw threads of the lead screw; 14. a cross bar; 15. a vertical rod; 16. a second through hole; 34. a pull ring; 35. a hinge hole; 36. positioning the surface; 41. a third via.

Detailed Description

As shown in fig. 1-5, a puller device for disassembling a bearing in a square end cover of a motor, wherein a bearing 67 is arranged in a square end cover 66 of the motor, and the disassembly of the bearing 67 is realized by the device of the present application, the concrete structure of the puller device comprises an ejection screw 1, the ejection screw 1 is in threaded fit with a nut 2 and an internal thread sleeve 8 from top to bottom, the nut 2 and the internal thread sleeve 8 are in detachable connection, and the nut 2 and the internal thread sleeve 8 synchronously rotate on the ejection screw 1; the bottom of the internal thread sleeve 8 is provided with a four-jaw puller component which can move up and down along with the internal thread sleeve 8 in the ejection screw rod 1; the bottom of the ejection screw rod 1 can be contacted with the outer ring of the bearing 67, and four pull claws 3 arranged on the four-claw pull horse assembly can be contacted with the bottom of the square end cover 66.

The principle is that the ejection screw 1 is in threaded fit with the nut 2 and the internal thread sleeve 8, the nut 2 serves as an external stressed screwing part, the internal thread sleeve 8 serves as a lifting part of the four-jaw puller assembly, the internal thread sleeve 8 also needs to rotate on the screw thread 13 part of the ejection screw 1 along with the nut 2 when the nut 2 rotates, and the four-jaw puller assembly is arranged on the internal thread sleeve 8 and can move up and down in the ejection screw 1 along with the internal thread sleeve 8; therefore, the square end cover 66 is clamped by the four pulling claws 3 arranged on the four-claw pulling device component and the bottom of the square end cover 66 in a contact manner, the bottom of the ejection screw rod 1 is contacted with the outer ring of the bearing 67 to abut against the outer ring of the bearing 67, and the four-claw pulling device component is lifted by rotating the nut 2 according to the screw rod transmission principle, so that the bearing 67 is pulled out by the four pulling claws 3.

In a further optimized scheme, in order to prevent the bearing 67 from generating alternating load when the bottom of the ejection screw rod 1 is abutted against the bottom of the bearing 67, the outer ring of the bearing 67 needs to be uniformly accepted, so that a scheme that three arc-shaped protrusions 11 are uniformly arranged around the circumference of the bottom of the section 12 of the polished rod at the lower part of the ejection screw rod 1 is adopted, the three uniformly distributed arc-shaped protrusions 11 form a dynamic balance point on the outer ring of the bearing 67, the outer ring of the bearing 67 can be uniformly stressed, and the damage to the bearing 67 is reduced.

Preferably, in order to enable three arc-shaped protrusions 11 to contact with the outer ring of the bearing 67, the inner diameter of the arc-shaped protrusions 11 needs to be larger than that of the outer ring of the bearing 67, and the outer diameter of the arc-shaped protrusions 11 needs to be smaller than that of the outer ring of the bearing 67.

For the four-jaw puller assembly, the improvement to the traditional three-jaw puller assembly form, the three-jaw puller form is many, the application adopts a four-jaw structure for realizing the purpose of disassembling the bearing 67 on the square end cover 66, namely, the four jaws are arranged on four points of the square end cover 66 to balance the stress of the square end cover, the four-jaw puller structure is many, one of the forms is selected and improved, other structures capable of realizing the lifting function can also be used as the lifting part of the application, the specific structure of the four-jaw puller assembly comprises an annular puller seat 4, one end of four connecting rods 9 is uniformly hinged on the outer wall of the annular puller seat 4, and the other end of the four connecting rods 9 is hinged with the upper part of one puller 3 respectively.

Preferably, a plurality of hinge holes 35 are formed in the pull claw 3 in a penetrating manner, one end of the connecting rod 9 can be hinged to the hinge holes 35 corresponding to different positions on the pull claw 3, it should be noted that four pull claws 3 need to be changed in position at the same time to be balanced, wherein the hinge holes 35 are arranged in proportion, and the connecting rod 9 and the pull claw 3 are connected through bolts 7 at the positions of the hinge holes 35.

Preferably, a pull ring 34 is provided on the top of the pull claw 3 to facilitate the pull claw 3 to be pulled by a tool, so that the horizontal positioning surface 36 provided on the hook part at the bottom of the pull claw 3 contacts with the bottom of the square end cap 66 to clamp the square end cap 66.

Further, in order to enable the four-jaw puller assembly to rotate and rise when the annular puller seat 4 moves upwards during operation, the internal thread sleeve 8 may possibly cause the annular puller seat 4 to rotate to cause a unhooking problem and prevent the annular puller seat 4 from rotating to cause the bearing 67 to generate alternating load, a positioning shaft shoulder 82 is arranged at the bottom of the outer cylindrical surface of the internal thread sleeve 8, the outer cylindrical surface of the internal thread sleeve 8 is sleeved with the annular puller seat 4 (here, the internal thread sleeve 8 is in clearance fit with the annular puller seat 4), and a thrust bearing 5 is arranged between the annular puller seat 4 and the positioning shaft shoulder 82 in the internal thread sleeve 8 in a matching manner; the thrust bearing 5 is used, so that when the four-jaw puller assembly is lifted by the internal thread sleeve 8, the four-jaw puller assembly only receives axial force, the friction force generated by the rotation of the internal thread sleeve 8 cannot influence the four-jaw puller assembly, and the generation of alternating load in the bearing 67 can be reduced.

In order to further reduce the rotation of the four-jaw puller component, a second through hole 16 is arranged on the side part of the thread at the top of the ejection screw rod 1, a cross bar 14 is inserted into the second through hole 16, vertical bars 15 which are vertically arranged are inserted into vertical through holes at two ends of the cross bar 14, the top position is limited by a split pin after the insertion, the bottom of the vertical rod 15 passes through two third through holes 41 correspondingly arranged on the top surface of the annular puller seat 4, so that the annular puller seat 4 can slide up and down along the two vertical rods 15, the annular puller seat 4 and the ejection screw rod 1 are connected together, the degree of freedom of horizontal rotation of the annular puller seat and the ejection screw rod is limited, the annular puller seat and the ejection screw rod can only move up and down along the vertical rod 15, the rotation of the four-jaw puller component can be reduced, meanwhile, the ejection screw rod 1 can be in a relatively fixed state, and when the nut 2 is screwed, the ejection screw rod 1 cannot rotate together under the action of screwing force, so that the nut 2 is convenient to screw.

Furthermore, the nut 2 and the internal thread sleeve 8 are detachably connected, so that the thrust bearing 5 and the four-jaw puller assembly are conveniently mounted on the internal thread sleeve 8, and the disassembly and the replacement are convenient. In a detachable form, the following forms are selected in the embodiment, namely, the nut 2 and the internal thread sleeve 8 are connected through a taper pin, a plurality of first through holes 21 are uniformly arranged on the end surface of the nut 2 in the circumferential direction of the screw hole, a plurality of conical holes 81 corresponding to the first through holes 21 are arranged on the upper top surface of the internal thread sleeve 8, a conical pin passes through the first through holes 21 and is matched with the corresponding conical holes 81 to connect the nut 2 and the internal thread sleeve 8 into a whole, because the nut 2 and the internal thread sleeve 8 are in threaded fit with each other and push out of the screw rod 1, the nut 2 and the internal thread sleeve 8 can be kept still without rotating and can not slide up and down, the nut 2 and the internal thread sleeve 8 can rotate simultaneously only by being connected together through a taper pin, the form can save space, the parts are relatively simple to manufacture, the installation of the thrust bearing 5 is convenient, the labor force can be reduced, and the cost is saved.

When in specific use: firstly, the four sides of the square end cover 66 and the positioning surface 36 of the pull claw 3 are placed, the three arc-shaped protrusions 11 and the outer ring of the bearing 67 at the opening of the square end cover 66 are positioned, the nut 2 is screwed by a wrench, the nut 2 drives the internal thread sleeve 8 to rotate upwards, the internal thread sleeve 8 drives the thrust bearing 5 and the annular pull horse seat 4 to move upwards, so that the pull claw 3 drives the square end cover 66 to move upwards, the bearing 67 is gradually ejected under the stress, and the ejected bearing 67 is caught by a sponge below the bearing.

Claims (7)

1. The puller device for disassembling the bearing in the square end cover of the motor comprises an ejection lead screw (1), wherein the ejection lead screw (1) ejects a bearing (67) arranged in the square end cover (66), and is characterized in that the ejection lead screw (1) is in threaded fit with a nut (2) and an internal thread sleeve (8) from top to bottom, the nut (2) and the internal thread sleeve (8) are connected in a detachable manner, and the nut (2) and the internal thread sleeve (8) synchronously rotate on the ejection lead screw (1); the bottom of the internal thread sleeve (8) is provided with a four-jaw puller assembly which can move up and down along with the internal thread sleeve (8) in the ejection screw rod; the bottom of the ejection screw rod (1) can be in contact with the outer ring of the bearing (67), and four pull claws (3) arranged on the four-claw pull horse assembly can be in contact with the bottom of the square end cover (66).

2. The puller device for disassembling the bearing in the square end cover of the motor according to claim 1, wherein the bottom end of the ejection screw rod (1) is uniformly provided with three arc-shaped protrusions (11) around the circumferential direction thereof, the inner diameter of each arc-shaped protrusion (11) is larger than the inner diameter of the outer ring of the bearing (67), and the outer diameter of each arc-shaped protrusion (11) is smaller than the outer diameter of the outer ring of the bearing (67).

3. The puller device for disassembling the bearing in the square end cover of the motor according to the claim 1, characterized in that the four-jaw puller component comprises an annular puller seat (4), one end of four connecting rods (9) is evenly hinged on the outer wall of the annular puller seat (4), and the other end of the four connecting rods (9) is hinged with the upper part of one puller jaw (3) respectively.

4. The puller device for disassembling the bearing in the square end cover of the motor according to the claim 3 is characterized in that a plurality of hinge holes (35) are arranged on the pulling claw (3) in a penetrating way, and one end of the connecting rod (9) can be hinged with the hinge holes (35) corresponding to different positions on the pulling claw (3).

5. The puller device for disassembling the bearing in the square end cover of the motor according to claim 3, characterized in that the outer cylindrical surface of the internal thread sleeve (8) is sleeved with the annular puller seat (4), a positioning shaft shoulder (82) is arranged at the bottom of the outer cylindrical surface of the internal thread sleeve (8), and the thrust bearing (5) is matched between the annular puller seat (4) and the positioning shaft shoulder (82) of the internal thread sleeve (8).

6. The puller device for disassembling the bearing in the square end cover of the motor according to claim 1, characterized in that the nut (2) is connected with the internally threaded sleeve (8) through a conical pin, a plurality of through holes (21) are uniformly arranged on the end surface of the nut (2) in the circumferential direction around the screw hole, a plurality of conical holes (81) corresponding to the first through holes (21) are arranged on the upper top surface of the internally threaded sleeve (8), and the conical pin passes through the through holes (21) and is matched with the corresponding conical holes (81) to connect the nut (2) and the internally threaded sleeve (8) into a whole.

7. The puller device for disassembling the bearing in the square end cover of the motor according to claim 1, wherein a second through hole (16) is arranged on the side of the thread at the top of the ejecting lead screw (1), a cross rod (14) is arranged in the second through hole (16), two ends of the cross rod (14) are respectively connected with a vertical rod (15) which is vertically arranged, the vertical rod (15) passes through two third through holes (41) which are correspondingly arranged on the top surface of the annular puller seat (4), and the annular puller seat (4) can slide up and down along the two vertical rods (15).

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