CN214723839U

CN214723839U - Puller

Info

Publication number: CN214723839U
Application number: CN202120733162.1U
Authority: CN
Inventors: 陈正云
Original assignee: Zhejiang Maxtop Tools Manufacture Co ltd
Current assignee: Zhejiang Maxtop Tools Manufacture Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-11-16
Anticipated expiration: 2031-04-12

Abstract

The utility model provides a puller belongs to hardware and tools technical field. The problem that the manufacturing cost is high because two casting molds are needed when the pull claw of the existing puller is used for casting is solved. This draw horse, including the spiral seat, the hob with draw the claw, draw the claw to include the claw body that two structures are the same, the composition surface of the two claw bodies forms the annular groove that the structure is the same and the position is relative through the cutting, the thickness of annular groove is half of claw body thickness and has seted up first hinge hole in the bottom surface of annular groove, the two claw bodies wear to establish the rivet through annular groove mutually supporting and in first hinge hole and form swing joint, wherein set up the second hinge hole on the claw body and be provided with the connecting plate in the both sides of second hinge hole, draw and wear to establish bolt swing joint through the connecting plate both ends between claw and the spiral seat. The utility model discloses a split type articulated two the same claws that draw of structure form to have two-way claw that colludes draws claw, and the recess of rethread at fitting surface cutting position symmetry makes it have the advantage that casting cost is lower.

Description

Puller

Technical Field

The utility model belongs to the technical field of hardware and tools, a draw horse is related to.

Background

The puller is a tool frequently used in mechanical maintenance, and is mainly used for axially detaching a damaged bearing from a shaft. Draw the horse mainly by the spiral seat, the hob with draw the claw to constitute, among the prior art, draw the claw to be the integral type and set up two claws that collude at both ends simultaneously, in order to make the range of application that draws the horse wider, be convenient for cooperate the bearing of different diameters, will draw to articulate even board between claw and the spiral seat usually, draw the horse as disclosed in the utility model patent application No. (CN 201621355326.7), it discloses draw the claw by the mobile jib, the pole handle and auxiliary rod are constituteed, do not disclose three's specific connection structure in its specification, can know mobile jib and pole handle formula structure as an organic whole through its drawing, the auxiliary rod articulates on the mobile jib, consequently, it has following problem, the mobile jib is different with the structure of auxiliary rod, need two pairs of casting moulds and structural mutually supporting when casting, consequently, manufacturing cost is higher.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind through split type articulated two structures the same draw claw form have two-way collude the claw that draws of claw, the rethread makes its casting cost lower draw the horse at the recess of fitting surface cutting position symmetry.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a draw horse, includes spiral seat, hob and draws the claw, the spiral seat be trident star structure and hob and pass the spiral seat center perpendicularly through screw-thread fit, its characterized in that, draw the claw including two claw bodies that the structure is the same, the tip of the claw body is the claw that colludes of outside extension, two the composition surface of the claw body forms the annular groove that the structure is the same and the position is relative through the cutting, the thickness of annular groove is half of claw body thickness and has seted up first hinge hole in the bottom surface of annular groove, two the claw body mutually support through annular groove and wear to establish rivet formation swing joint in first hinge hole, one of them the claw body on set up the second hinge hole and be provided with the connecting plate in the both sides of second hinge hole, draw between claw and the hob wear to establish bolt swing joint through the connecting plate both ends.

In the above puller, the distance between the two holes on the connecting plate is greater than the distance between the second hinge hole on the claw body and the hook claw.

In the puller, the bottom of the screw rod is in a conical structure, and the top of the screw rod is provided with an integrated hexagonal nut.

In the puller, the inner end surface of the hook claw is provided with an inverted tooth-shaped anti-slip structure.

Compared with the prior art, the puller has the advantages that the two claw bodies of the pulling claw are designed to be identical in structure, so that the same pair of casting molds can be used for casting and forming, the cost is reduced, the annular grooves with opposite positions are cut on the joint surfaces of the two claw bodies by the machine tool, the annular grooves can be matched and hinged with each other, and the connecting structure is simpler.

Drawings

FIG. 1 is a schematic structural view of the present puller;

FIG. 2 is an exploded view of the structure of the pull pawl;

in the figure, 1, a screw seat; 2. a screw rod; 3. pulling a claw; 301 a claw body; 302. hooking claws; 4. an annular groove; 5. a first hinge hole; 6. riveting; 7. a second hinge hole; 8. a connecting plate; 9. a bolt; 10. and (4) an anti-skid structure.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the puller comprises a screw seat 1, a screw rod 2 and a pulling claw 3, wherein the screw seat 1 is in a three-pointed star structure, the screw rod 2 vertically penetrates through the center of the screw seat 1 through thread fit, the pulling claw 3 comprises two claw bodies 301 with the same structure, the claw bodies 301 are cast and molded through the same pair of casting molds, the end parts of the claw bodies 301 are hook claws 302 extending outwards, the claw bodies 301 and the hook claws 302 are in an integrated structure, the outer end surfaces of the hook claws 302 are in a planar structure, the joint surfaces of the two claw bodies 301 are cut to form annular grooves 4 with the same structure and opposite positions, the thickness of the annular groove 4 is half of the thickness of the claw body 301, a first hinge hole 5 is formed in the bottom surface of the annular groove 4, the two claw bodies 301 are mutually matched through the annular groove 4 and are provided with a rivet 6 in the first hinge hole 5 to form movable connection, and by the structure, the joint surface between the two claw bodies 301 can be just clamped into the annular groove 4, and can rotate with the rivet 6 as a pivot, namely, when the size of the disassembled bearing is large, the structure can ensure that the matching point of the hook claw 302 is not easy to fall off.

Wherein, a second hinge hole 7 is arranged on one claw body 301, connecting plates 8 are arranged on two sides of the second hinge hole 7, the pull claw 3 is movably connected with the spiral seat 1 through bolts 9 arranged at two ends of the connecting plates 8, and in the structure, the distances between the second hinge hole 7 and the two hook claws 302 are different, so that the matching of bearings with different sizes is facilitated.

Further, the distance between two holes on the connecting plate 8 is greater than the distance between the second hinge hole 7 on the claw body 301 and the hook claw 302, so that the end of the claw body 301 is not blocked by the screw seat 1 during rotation.

The bottom of hob 2 is the circular cone structure, can play anti-skidding effect when supporting, and the top of hob 2 has the hexagon nut of integral type, is convenient for rotate more laborsavingly with the spanner cooperation.

The inner end surface of the hook claw 302 is provided with the inverted-tooth-shaped anti-slip structure 10, so that the hook claw 302 is not easy to fall off when contacting with the end surface of the bearing.

This draw horse in use, collude claw 302 and bearing end face and support and lean on, the hob 2 supports and leans on with the pivot at bearing center, make the bearing drop from the pivot through rotatory hob 2, in this draw horse, when the size of bearing is less, can use and lean on the bearing with the nearer claw 302 of colluding of second hinge hole 7 distance, it is practical convenient, when the size of bearing is great, can be practical and the claw 302 of colluding that the second hinge hole 7 distance is far away supports and leans on the bearing and cooperate first hinge hole 5, make collude claw 302 with the bearing cooperation more firm.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although various terms are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a draw horse, includes spiral seat (1), hob (2) and draws claw (3), spiral seat (1) be trident star structure and hob (2) and pass spiral seat (1) center perpendicularly through screw-thread fit, a serial communication port, draw claw (3) including the same claw body (301) of two structures, the tip of claw body (301) is for outside claw (302) that colludes that extend, two the composition surface of claw body (301) is through cutting formation structure the same and relative annular groove (4) in position, the thickness of annular groove (4) is half of claw body (301) thickness and has seted up first articulated hole (5) in the bottom surface of annular groove (4), two claw body (301) wear to establish rivet (6) and form swing joint in first articulated hole (5) through annular groove (4) mutually supporting, one of them claw body (301) on set up second hole (7) and be provided with articulated hole (7) in the both sides of second articulated hole (7), one of claw body (301) on The pull claw (3) is movably connected with the spiral seat (1) through bolts (9) penetrating through two ends of the connecting plate (8).

2. A puller as claimed in claim 1, characterised in that the distance between two holes in said connecting plate (8) is greater than the distance between the second hinge hole (7) in said claw body (301) and said hook (302).

3. Puller according to claim 1, characterised in that the bottom of the screw rod (2) is of conical configuration and the top of the screw rod (2) is provided with an integral hexagonal nut.

4. A puller as claimed in claim 1, characterised in that the inner end surface of the claw (302) is provided with an inverted tooth-like anti-slip arrangement (10).