CN204450409U - Adjustablely draw horse - Google Patents

Abstract

The utility model discloses an adjustable puller, which comprises a puller seat, a push rod, a connecting arm and a pulling claw. The pulling claw includes an outer pull rod and an inner pull rod; the outer pull rod includes a connecting part and a cylindrical part. The pull claw is connected with the connecting arm through the connecting part; the inner pull rod includes a cylindrical part and a hook, and the cylindrical part extends into the inside of the cylindrical part and forms a cylindrical pair with the cylindrical part; the cylindrical part is provided with a guide The guide groove includes an axial groove and more than two bayonet sockets; a positioning pin is arranged on the cylindrical part, and the positioning pin can drive the cylindrical part to move axially in the axial groove, and can be stuck in the bayonet to limit the above axial movement. The device has a large adjustment range for the length of the claws and a long maximum length of the claws, and is suitable for dismounting parts such as bearings that are far away from the end face of the shaft.

Description

adjustable puller

technical field

The utility model relates to a dismantling tool, in particular to an adjustable puller.

Background technique

Puller is a tool often used in mechanical maintenance, mainly used to remove damaged bearings or couplings from the shaft along the axial direction. As shown in Figure 1, the puller is mainly composed of a puller seat 1, a push rod 2 (that is, a screw rod), a connecting arm 3 and a pull claw 4. The push rod 2 is threaded at the center of the puller seat 1, and the push rod is screwed The hexagonal head 21 on the 2 can adjust the telescopic length of the push rod 2. The pull claw 4 is connected to the puller seat 1 through the connecting arm 3 . The number of pull claws 4 is generally two or three, and the corresponding pullers are respectively called two-claw pullers and three-claw pullers. The end of each pull claw 4 is provided with an inwardly bent claw hook 443 . When in use, position the tip 22 of the ejector rod in the tip hole of the shaft end, adjust the position of the claw 4 so that the claw hook 443 is hooked to the outer ring of the bearing, and rotate the hexagonal head 21 so that the pull claw 4 drives the bearing to move outward in the axial direction tear down. The main dimensions of the puller include the length of the claws, the distance between the claws and the length of the ejector rod. Generally, different pullers need to be selected according to the diameter of the bearing and the axial installation depth. Ordinary Ramallah claws are short in length and cannot be used for bearings, couplings and other parts that are far away from the shaft end face.

Contents of the invention

The purpose of the utility model is to provide an adjustable puller whose length of the claw can be adjusted and which can be used to remove parts such as bearings which are far away from the end face of the shaft.

In order to achieve the above purpose, the adjustable puller designed by the utility model includes a puller seat, a push rod, a connecting arm and a pull claw; the connecting arm is connected between the puller seat and the pull claw, and is generally sheet or Rod-shaped; the pull claw includes an outer pull rod and an inner pull rod; the outer pull rod includes a connecting portion and a cylindrical portion, and the pull claw is connected to the connecting arm through the connecting portion; the inner pull rod includes a cylindrical portion and a hook, the The cylindrical part extends into the interior of the cylindrical part and forms a cylindrical pair with the cylindrical part; a guide groove is provided on the cylindrical part, and the guide groove includes an axial groove and more than two bayonet sockets; A positioning pin is provided, and the positioning pin can drive the cylindrical part to move axially in the axial groove, and can be stuck in the bayonet to limit the above-mentioned axial movement.

As a preferred solution, the guide groove is provided with 3 to 6 bayonet sockets, each bayonet socket is evenly distributed on the guide groove, and multiple bayonet sockets can provide various lengths of the pull claws. Further, the number of bayonet sockets is five, and each bayonet socket is evenly distributed on the guide groove.

As a preferred solution, the bayonet is an L-shaped groove, one side of which is connected to the axial groove and is perpendicular to the axial groove, and the other side is parallel to the axial groove and points to the direction where the hook is located.

As a preferred solution, the connecting arm is fixedly connected with the puller seat, and the connecting part of the pulling claw is provided with a connecting hole matched with the connecting arm, and the connecting hole is set on the connecting arm and can be moved along the connecting arm. sliding, the connecting part is fastened on the connecting arm by screws; the connecting arm is provided with a scale line. In this solution, the connecting hole can slide along the connecting arm, so the distance between the claws can be adjusted conveniently, and the distance between the claws can be further determined by the scale line on the claw arm.

The beneficial effects of the utility model are: 1) the telescopic sleeve-type design of the outer pull rod and the inner pull rod provides a larger adjustment range for the length of the claw, and is suitable for dismounting parts such as bearings at different distances from the shaft end face; 2) due to the extension The length of the long rear claw is longer, so it is suitable for removing parts such as bearings that are far away from the end face of the shaft; 3) It is suitable for pullers with different numbers of claws.

Description of drawings

Fig. 1 is a schematic structural view of a puller in the prior art.

Fig. 2 is a front structural schematic diagram of the adjustable puller of the present invention.

FIG. 3 is a schematic top view of the puller in FIG. 2 .

FIG. 4 is a schematic structural view of the pulling claw in FIG. 2 .

Fig. 5 is a schematic cross-sectional view of A-A of the pulling claw in Fig. 4 .

Fig. 6 is a schematic structural diagram of the inner tie rod in Fig. 4 .

Fig. 7 is a schematic structural diagram of the outer tie rod in Fig. 4 .

Among them: puller seat 1, ejector rod 2, hexagonal head 21, top 22, connecting arm 3, scale line 31, pull claw 4, outer rod 41, connecting part 42, connecting hole 421, screw 422, cylindrical part 43, Guide groove 431, axial groove 432, bayonet 433, inner rod 44, cylindrical part 441, positioning pin 442, claw hook 443

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in FIG. 1 , the puller in the prior art has been introduced in detail in the background art, and will not be repeated here.

As shown in Figures 2 to 7, the improved adjustable puller of the present invention is a three-jaw puller, which includes a puller seat 1, a push rod 2, a connecting arm 3 and a pull claw 4. The top rod 2 is threadedly connected to the center of the puller seat 1, and its two ends are respectively provided with a hexagonal head 21 and a top 22.

The pull claw 4 includes an outer pull rod 41 and an inner pull rod 44 . The outer rod 41 includes a connecting portion 42 and a cylindrical portion 43 . The inner rod 44 includes a cylindrical portion 441 and a claw hook 443 . The cylindrical portion 441 extends into the interior of the cylindrical portion 43 and forms a cylindrical pair with the cylindrical portion 43 . The cylindrical part 43 is provided with a guide groove 431 , and the guide groove 431 includes an axial groove 432 and five evenly distributed bayonet sockets 433 . A positioning pin 442 is disposed on the cylindrical portion 441 . The bayonet 433 is an L-shaped groove, one side of which is connected to the axial groove 432 and is perpendicular to the axial groove 432 , and the other side is parallel to the axial groove 432 and points to the direction where the claw hook 443 is located.

The three connecting arms 3 are fixedly connected to the puller seat 1 at an angle of 120° to each other, and their long sides are perpendicular to the axial direction of the push rod 2 . The connecting part 42 of the pull claw 4 is provided with a connecting hole 421 matched with the connecting arm 3. The connecting hole 421 is set on the connecting arm 3 and can slide along the connecting arm 3; The part 42 is fastened on the connecting arm 3; the connecting arm 3 is provided with a scale line 31 to assist in determining the distance between the pulling claws.

When the above-mentioned device is in use, the length of the claw and the distance between the claws can be adjusted respectively. The adjustment method is as follows: 1) Adjust the length of the claw, move the cylindrical part 441 so that the positioning pin 442 is in the axial groove 432, and move the cylindrical part axially 441 to extend or shorten the total length of the pull claw 4. After reaching a suitable position, move the positioning pin 442 into the bayonet 433 to keep the total length of the pull claw 4 unchanged; 2) Adjust the distance between the pull claws and move along the connecting arm 3 After the pulling claw 4 reaches a proper position, tighten the screw 422 to fix the pulling claw 4 on the connecting arm 3 .

Claims (6)

1. An adjustable puller, comprising a puller seat (1), a push rod (2), a connecting arm (3) and a pull claw (4), characterized in that: the pull claw (4) includes an outer pull rod ( 41) and an inner pull rod (44); the outer pull rod (41) includes a connecting portion (42) and a cylindrical portion (43), and the pull claw (4) is connected to the connecting arm (3) through the connecting portion (42) ; The inner pull rod (44) includes a cylindrical part (441) and a claw hook (443), and the cylindrical part (441) extends into the inside of the cylindrical part (43) and forms a cylindrical pair with the cylindrical part (43); A guide groove (431) is provided on the cylindrical part (43), and the guide groove (431) includes an axial groove (432) and more than two bayonet sockets (433); A positioning pin (442) is provided, and the positioning pin (442) can drive the cylindrical part (441) to move axially in the axial groove (432), and can be stuck in the bayonet (433) to limit the shaft to move. 2. The adjustable puller according to claim 1, characterized in that 3 to 6 bayonets (433) are arranged on the guide groove (431), and each bayonet (433) is evenly distributed in the guide groove (431). 431) on. 3. The adjustable puller according to claim 2, characterized in that: five bayonets (433) are arranged on the guide groove (431), and each bayonet (433) is evenly distributed in the guide groove (431) superior. 4. The adjustable puller according to any one of claims 1-3, characterized in that: the bayonet (433) is an L-shaped groove, one side of which is connected to the axial groove (432) and is perpendicular to On the axial groove (432), the other side is parallel to the axial groove (432) and points to the direction where the claw hook (443) is located. 5. The adjustable puller according to any one of claims 1-3, characterized in that: the connecting arm (3) is fixedly connected to the puller seat (1), and the connection of the pulling claw (4) The connecting hole (421) matched with the connecting arm (3) is arranged on the part (42). The connecting hole (421) is set on the connecting arm (3) and can slide along the connecting arm (3). The part (42) can be fastened on the connecting arm (3) by screws (422); the connecting arm (3) is provided with a scale line (31). 6. The adjustable puller according to claim 4, characterized in that: the connecting arm (3) is fixedly connected to the puller seat (1), and the connecting part (42) of the pull claw (4) is set There is a connecting hole (421) matched with the connecting arm (3), the connecting hole (421) is sleeved on the connecting arm (3) and can slide along the connecting arm (3), and the connecting part (42) can pass through The screw (422) is fastened on the connecting arm (3); the connecting arm (3) is provided with a scale line (31).