CN210173446U - Traction device - Google Patents

Abstract

The utility model provides a traction device for draw the inner tube in the outer tube, include: a conical guide head; one end of the first screw rod is connected with the conical guide head, and the first screw rod is coaxial with the conical guide head; the internal thread of the screwed nipple penetrates through the whole screwed nipple, one end of the screwed nipple is in threaded connection with the other end of the first screw rod, and the screwed nipple is coaxial with the first screw rod; one end of the second screw rod is in threaded connection with the other end of the threaded connecting pipe, and the second screw rod is coaxial with the threaded connecting pipe; the clamping fixing component is clamped between the inner wall of the inner tube and the outer peripheral surface of the conical guide head; the other end of the second screw rod penetrates through a center hole of the seat plate, and the other end of the second screw rod is installed on the seat plate through a fastening part; the cushion block is arranged between the outer pipe and the seat plate. The traction device is simple in structure, reasonable in design, convenient to use, capable of being repeatedly used and capable of efficiently drawing the inner pipe to a proper position.

Description

Traction device

Technical Field

The utility model relates to an engineering operation technical field especially relates to a draw gear.

Background

The controllable pitch propeller is a ship propulsion device, mainly comprises an oil distributor, an in-shaft oil pipe and a propeller hub, and is used for conveying hydraulic oil through the in-shaft oil pipe inside to realize course adjustment of a ship. The inner oil pipe of the ship pitch control propeller system is located at a deep position inside the outer oil pipe, the situation that the inner oil pipe moves is frequently generated in the installation and maintenance process of the pitch control propeller system, and the construction progress is influenced due to the fact that the pitch control propeller system is difficult to pull out due to narrow space. At present, an expansion screw is adopted as an operation tool, the expansion screw is placed in an inner oil pipe, a horn-shaped front section of a screw rod is in contact with a stepped hole of the inner oil pipe, the screw rod is ejected out by tightening a nut with a wrench, the inner oil pipe is pried out by a crowbar, and the tool can only be used under the condition that the backward moving distance of the inner oil pipe is short. How to design a structure which can not be influenced by the backward moving distance of the inner pipe to pull the inner pipe is a problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a traction device for solving the above-mentioned problems existing in the prior art.

To achieve the above and other related objects, the present invention provides a traction device for drawing an inner tube in an outer tube, the traction device comprising:

a conical guide head;

one end of the first screw rod is connected with the conical guide head, and the first screw rod is coaxial with the conical guide head;

the internal thread of the threaded connecting pipe penetrates through the whole threaded connecting pipe, one end of the threaded connecting pipe is in threaded connection with the other end of the first screw rod, and the threaded connecting pipe is coaxial with the first screw rod;

one end of the second screw rod is in threaded connection with the other end of the threaded connection pipe, and the second screw rod is coaxial with the threaded connection pipe;

the clamping fixing component is clamped between the inner wall of the inner pipe and the outer peripheral surface of the conical guide head;

the other end of the second screw rod penetrates through a central hole of the seat plate, and the other end of the second screw rod is mounted on the seat plate through a fastening part;

and the cushion block is arranged between the outer pipe and the seat plate.

Preferably, two ends of the conical guide head are tightly connected with the first screw rod through lock nuts.

Preferably, adjusting nuts are arranged at two ends of the threaded connection pipe, and the first screw rod and the second screw rod are respectively and tightly connected with the threaded connection pipe through the corresponding adjusting nuts.

Preferably, the seat plate is provided with a through hole for the clamping fixing part to pass through.

Preferably, the fastening member includes a washer and a fastening nut, the washer being between the fastening nut and the seat plate.

Preferably, the number of the clamping fixing parts is two, and the two clamping fixing parts are arranged oppositely.

Preferably, a stepped hole part is arranged in one end of the inner tube, into which the conical guide head is inserted, and comprises a first stepped hole, a transition part and a second stepped hole which are sequentially connected from outside to inside, wherein the inner diameter of the first stepped hole is smaller than that of the second stepped hole; the clamping fixing component comprises a delivery rod, a locking part and an extension rod which are sequentially connected, the locking part is opposite to the delivery rod and is obliquely arranged, the delivery rod and the extension rod are arranged in parallel, and the locking part is used for clamping and locating a transition part of the stepped hole part and the outer peripheral surface of the conical guide head.

Preferably, the conical guide head is made of a steel material.

Preferably, the number of the cushion blocks is two, and the two cushion blocks are symmetrically arranged by taking the central axis of the second screw rod as a symmetry axis.

As described above, the utility model discloses a draw gear has following beneficial effect:

the utility model discloses a draw gear is used for drawing the inner tube in the outer tube, fixed first lead screw and toper direction head, put into the inner tube after connecting first lead screw and second lead screw with the nipple, insert joint fixed part between the inner wall of inner tube and the toper direction head outer peripheral face, make toper direction head can not be pulled out, install the bedplate in the one end that the toper direction head was kept away from to the second lead screw, the cushion sets up between outer tube and bedplate, screw up nut and gasket, compress tightly cushion and bedplate fixed, constantly screw up the nut with the spanner, draw the inner tube to the ideal position; the internal thread of the threaded connecting pipe penetrates through the whole threaded connecting pipe, so that the depth of the first screw rod and the second screw rod inserted into the threaded connecting pipe can be adjusted according to different traction distances, and a plurality of rod pieces with different lengths are prevented from being manufactured; the cushion block is arranged between the outer pipe and the seat plate, so that the pressure on the seat plate in the traction process is effectively reduced; therefore, the utility model discloses a draw gear reasonable in design, simple structure, and easily preparation, convenient to use, but reuse conveniently carries and deposits, reduces constructor's intensity of labour, improves work efficiency.

Drawings

Fig. 1 shows a schematic structural diagram of the traction device of the present invention.

Fig. 2 is a schematic view showing the operation and use of the traction device of the present invention.

Description of the element reference numerals

1 conical guide head

11 lock nut

2 first lead screw

3 threaded connection pipe

31 adjusting nut

4 second screw rod

5 clamping fixing component

51 delivery rod

52 locking part

53 extension rod

6 inner pipe

61 stepped hole portion

611 first stepped hole

612 transition part

613 second stepped hole

7 seat board

8 fastening part

81 shim

82 fastening nut

9 cushion block

10 outer tube

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. 1-2. It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents 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 that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the efficacy 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.

As shown in the figure, the utility model provides a draw gear for draw the inner tube in the outer tube, its characterized in that, draw gear includes: a conical guide head 1; one end of the first screw rod 2 is connected with the conical guide head 1, and the first screw rod 2 is coaxial with the conical guide head 1; the threaded connection pipe 3 is characterized in that internal threads of the threaded connection pipe 3 penetrate through the whole threaded connection pipe 3, one end of the threaded connection pipe 3 is in threaded connection with the other end of the first screw rod 2, and the threaded connection pipe 3 is coaxial with the first screw rod 2; one end of the second screw rod 4 is in threaded connection with the other end of the threaded connection pipe 3, and the second screw rod 4 is coaxial with the threaded connection pipe 3; the clamping fixing component 5 is clamped between the inner wall of the inner tube 6 and the outer peripheral surface of the conical guide head 1; the other end of the second screw rod 4 penetrates through a central hole of the seat plate 7, and the other end of the second screw rod 4 is installed on the seat plate 7 through a fastening part 8; the spacer 9, the spacer 9 is arranged between the outer tube 10 and the seat plate 7.

The utility model discloses a when draw gear used, inserted the one end of first lead screw 2 and passed toper direction head 1, fastened at the both ends of toper direction head 1 with lock nut 11, prevented that toper direction head 1 from dropping. Calculating the depth of the first screw rod 2 which needs to be inserted into the threaded connection pipe 3 and the depth of the second screw rod 4 which needs to be inserted into the threaded connection pipe 3 according to the distance which needs to be pulled by the inner pipe, connecting the other end of the first screw rod 2 with one end of the threaded connection pipe 3 in a threaded manner according to the calculated insertion depth, connecting one end of the second screw rod 4 with the other end of the threaded connection pipe 3 in a threaded manner according to the calculated insertion depth, after the second screw rod 4 is connected, sending the conical guide head 1 into the stepped hole part 61 in the inner pipe 6, inserting the clamping and fixing part 5 between the inner wall of the inner pipe 6 and the outer peripheral surface of the conical guide head 1, so that the conical guide head 1 cannot be pulled out from the inner pipe 6, penetrating the other end of the second screw rod 4 through the central hole of the seat plate 7, installing the other end of the second screw rod 4 on the seat plate 7 through the fastening part 8, installing the cushion, the inner tube 6 is pulled to the desired position.

In the embodiment, the internal thread of the threaded connection pipe 3 penetrates through the whole threaded connection pipe 3, the connection insertion depth of the first screw rod 2, the second screw rod 4 and the threaded connection pipe 3 can be flexibly adjusted according to different traction distances, and excessive rod pieces with different specifications are prevented from being manufactured; meanwhile, the cushion block 9 is arranged between the outer pipe 10 and the seat plate 7, so that the pressure on the seat plate 7 is effectively reduced, the seat plate is prevented from being damaged, and the service life of the traction device is prolonged. Therefore, the utility model discloses a draw gear reasonable in design, simple structure, and easily preparation, convenient to use, but reuse conveniently carries and deposits, reduces constructor's intensity of labour, improves work efficiency.

In the embodiment, the first screw rod 2 is inserted into and penetrates through the conical guide head 1, and two ends of the conical guide head 1 are tightly connected with the first screw rod 2 through the locking nut 11, so that the conical guide head 1 is prevented from falling off in the process of pulling the inner pipe.

According to the distance that the inner tube 6 needs to be pulled, the depth that the first lead screw 2 is inserted into the threaded connection pipe 3 and the depth that the second lead screw 4 is inserted into the threaded connection pipe 3 are calculated, according to the calculated insertion depth, the first lead screw 2 and the second lead screw 4 are respectively in threaded connection with the threaded connection pipe 3, adjusting nuts 31 are arranged at two ends of the threaded connection pipe 3, after the threaded connection pipe is connected to the specified depth, the first lead screw 2 and the second lead screw 4 are respectively in fastening connection with the threaded connection pipe 3 through the corresponding adjusting nuts 31, and relative sliding between the first lead screw 2 and the threaded connection pipe 3 and between the second lead screw 4 and the threaded connection pipe.

After the draw gear installation is accomplished, constantly exert the fastening force to fastening nut 82 with the spanner, and inner tube 6 receives the effect of fastening force to be close to bedplate 7, and in this embodiment, inner tube 6's traction distance is long, is equipped with the through-hole that supplies joint fixing part 5 to pass on bedplate 7, and joint fixing part 5 can pass through-hole on the bedplate 7, can prevent that joint fixing part 5 from supporting the traction distance that bedplate 7 restricted inner tube 6.

The other end of the second lead screw 4 penetrates through the seat plate 7 and is installed on the seat plate 7 through the fastening component 8, the fastening component 8 comprises a gasket 81 and a fastening nut 82, the gasket 81 is located between the fastening nut 82 and the seat plate 7, the inner pipe 6 is drawn to a proper position by applying acting force to the fastening nut 82 through a wrench, and the gasket 81 can disperse pressure of the fastening nut 82 on the seat plate 7.

In this embodiment, the tapered guide head 1 is placed in the stepped hole portion 61 of the inner tube 6, two clamping fixing members 5 are provided, the two clamping fixing members 5 are oppositely arranged and inserted between the tapered guide head 1 and the stepped hole portion 61 of the inner tube 6, one side of each clamping fixing member 5 is in contact with the inner wall of the stepped hole portion 61 of the inner tube 6, the other side of each clamping fixing member 5 is in contact with the outer peripheral surface of the tapered guide head 1, and the clamping fixing members 5 can prevent the tapered guide head 1 and the inner tube 6 from sliding relatively.

The inner part of one end, inserted by the conical guide head 1, of the inner tube 6 is provided with a stepped hole part 61, the stepped hole part 61 comprises a first stepped hole 611, a transition part 612 and a second stepped hole 613 which are sequentially connected from outside to inside, the inner diameter of the first stepped hole 611 is smaller than that of the second stepped hole 613, the position, extending into the stepped hole part 61, of the conical guide head 1 penetrates through the first stepped hole 611, the clamping and fixing part 5 is clamped between the conical guide head 1 and the stepped hole part 61 of the inner tube, the transition part 612 can increase the clamping and fixing area of the clamping and fixing part 5, the conical guide head 1 and the inner wall of the inner tube 6, relative sliding of the conical guide head 1 and the inner tube 6 can be prevented, the clamping and fixing area can also prevent the inner tube 6 and a traction device from being.

The clamping fixing component 5 comprises a delivery rod 51, a locking part 52 and an extension rod 53 which are connected in sequence, the locking part 52 is arranged obliquely relative to the delivery rod 51, the delivery rod 51 and the extension rod 53 are arranged in parallel, after the conical guide head 1 extends into the inner tube 6, the locking part 52 and the extension rod 53 are delivered and extend into the inner tube 6 through the delivery rod 51, the locking part 52 is clamped between a transition part 612 of the stepped hole part 61 and the outer peripheral surface of the conical guide head 1, the extension rod 53 is positioned in the second stepped hole 613, one side of the clamping fixing component 5 is contacted with the inner wall of the inner tube 6, and the other side of the clamping fixing component 5 is contacted with the outer peripheral surface of the conical guide head 1.

In the embodiment, the conical guide head 1 is made of steel material, and the conical guide head 1 made of steel material has the advantages of high strength, high tensile strength, high compression strength, high bending strength and high shearing strength, good plasticity and toughness, capability of bearing large plastic deformation, wear resistance and repeated use.

In this embodiment, the quantity of cushion 9 is two, and two cushion 9 use the axis of second lead screw 4 as the symmetry axis, and the symmetry sets up, sets up the cushion and can show the pressure that reduces bedplate 7 and receive, prevents effectively that bedplate 7 from taking place the damage in draw gear working process.

As a specific assembling implementation process of the traction device:

firstly, determining the distance of the inner tube 6 to be pulled according to the backward moving position of the inner tube 6, further calculating the threaded connection depth of the first screw rod 2 and the threaded connection tube 3, and calculating the threaded connection depth of the second screw rod 4 and the threaded connection tube 3;

secondly, after elements required by the traction device are prepared, inserting one end of a first screw rod 2 into a conical guide head 1, tightly connecting two ends of the conical guide head 1 with the first screw rod 2 through a locking nut 11 to prevent the conical guide head 1 from falling off in the traction process, carrying out threaded connection on the other end of the first screw rod 2 and one end of a threaded connection pipe 3 according to the calculated connection depth, carrying out threaded connection on one end of a second screw rod 4 and the other end of the threaded connection pipe 3 according to the calculated connection depth, arranging adjusting nuts 31 at two ends of the threaded connection pipe 3, and tightly connecting the first screw rod 2 and the second screw rod 4 with the threaded connection pipe 3 through corresponding adjusting nuts 31 respectively;

and thirdly, putting the tool in the second step into the inner tube 6, and symmetrically inserting the two clamping fixing parts 5 between the inner wall of the inner tube 6 and the outer peripheral surface of the conical guide head 1 to prevent the conical guide head 2 from being pulled out. The seat plate 7 is installed at the end face position of the outer pipe, the other end of the second lead screw 4 penetrates through the center hole of the seat plate 7, the other end of the second lead screw 4 is installed on the seat plate 7 through a fastening component 8, the fastening component 8 comprises a gasket 81 and a fastening nut 82, and the gasket 81 is located between the fastening nut 82 and the seat plate 7. The cushion blocks 9 are arranged between the end face of the outer pipe 10 and the seat plate 7, the number of the cushion blocks 9 is two, and the two cushion blocks 9 are symmetrically arranged by taking the central axis of the second screw rod 4 as a symmetry axis. Tightening the fastening nut 82 to tightly press and fix the cushion block 9 and the seat plate 7;

fourthly, acting force is applied to the fastening nut 82 through a wrench, and the inner pipe 6 is pulled to an ideal position through the traction device so as to meet construction requirements.

To sum up, the utility model discloses a draw gear is applied to the inner tube of pulling in the outer tube, reasonable in design, simple structure, and easily preparation, convenient to use, but reuse to can reduce constructor's intensity of labour, improve work efficiency. 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 to be construed as limiting the 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. A pulling device for pulling an inner tube in an outer tube, the pulling device comprising:

a conical guide head (1);

one end of the first screw rod (2) is connected with the conical guide head (1), and the first screw rod (2) is coaxial with the conical guide head (1);

the internal thread of the nipple (3) penetrates through the whole nipple (3), one end of the nipple (3) is in threaded connection with the other end of the first screw rod (2), and the nipple (3) is coaxial with the first screw rod (2);

one end of the second screw rod (4) is in threaded connection with the other end of the threaded connection pipe (3), and the second screw rod (4) is coaxial with the threaded connection pipe (3);

the clamping fixing component (5) is clamped between the inner wall of the inner pipe (6) and the outer peripheral surface of the conical guide head (1);

the other end of the second screw rod (4) penetrates through a central hole of the seat plate (7), and the other end of the second screw rod (4) is installed on the seat plate (7) through a fastening part (8);

the cushion block (9), the cushion block (9) is arranged between the outer pipe (10) and the seat plate (7).

2. The towing attachment in accordance with claim 1, wherein: two ends of the conical guide head (1) are fixedly connected with the first screw rod (2) through locking nuts (11).

3. The towing attachment in accordance with claim 1, wherein: adjusting nuts (31) are arranged at two ends of the threaded connection pipe (3), and the first screw rod (2) and the second screw rod (4) are respectively and fixedly connected with the threaded connection pipe (3) through the corresponding adjusting nuts (31).

4. The towing attachment in accordance with claim 1, wherein: the seat plate (7) is provided with a through hole for the clamping fixing part (5) to pass through.

5. The towing attachment in accordance with claim 1, wherein: the fastening member (8) includes a washer (81) and a fastening nut (82), and the washer (81) is located between the fastening nut (82) and the seat plate (7).

6. The towing attachment in accordance with claim 1, wherein: the clamping fixing parts (5) are two, and the two clamping fixing parts (5) are arranged oppositely.

7. The towing attachment in accordance with claim 1 or 6, wherein: a stepped hole part (61) is arranged in one end, inserted by the conical guide head (1), of the inner tube (6), the stepped hole part (61) comprises a first stepped hole (611), a transition part (612) and a second stepped hole (613) which are sequentially connected from outside to inside, and the inner diameter of the first stepped hole (611) is smaller than that of the second stepped hole (613); joint fixed part (5) are including delivery pole (51), locking portion (52) and extension rod (53) that connect gradually, locking portion (52) for delivery pole (51) set up for the slope, delivery pole (51) with extension rod (53) are parallel arrangement, locking portion (52) card is located transition portion (612) of shoulder hole portion (61) with between toper direction head (1) the outer peripheral face.

8. The towing attachment in accordance with claim 1, wherein: the conical guide head (1) is made of steel material.

9. The towing attachment in accordance with claim 1, wherein: the number of the cushion blocks (9) is two, and the cushion blocks (9) are symmetrically arranged by taking the central axis of the second screw rod (4) as a symmetry axis.

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