CN205829023U - Pulley block - Google Patents

Abstract

The utility model provides a pay-off pulley, which comprises a pulley, a hook, a rotating shaft, a connecting part, and a fixing device. The pay-off pulley also includes a limit device, the limit device includes a limit body and a limit point component, wherein the limit point component is arranged on the metal plate opposite to the metal plate with the hinge, the The limiting body is located on the same side as the limiting point component; the limiting main body is located directly below one end surface of the rotating shaft when the hook maintains a vertical upward position and is welded to the lower half of the end surface Together, the side of the position-limiting body welded to the end face is adapted in shape to the end face, and the upper end face of the position-limiting body is located at the axis passing through the rotation shaft and perpendicular to the axis of the hook On a straight line; when the hook maintains a vertical upward position, the limiting point part is located on the metal plate on the side where the limiting main body is located, in the middle position above the end surface of the rotating shaft and close to the end surface.

Description

pay-off pulley

technical field

The utility model relates to the field of mechanical equipment, in particular to a pay-off pulley used for erecting lines.

Background technique

The pay-off pulley (also known as the pay-off pulley) is one of the necessary tools for the erection of overhead lines, and is used to lay out wires such as cables and optical cables. For example, during the wiring process of the transmission and distribution lines of the power system, the wires, optical cables, etc. are laid on the line sequentially through the pay-off pulleys suspended on the wire tower poles. During this process, the wires pass through the pay-off pulleys , can not only reduce the friction force of the wire, but also avoid the damage of the wire. There are many types of pay-off pulleys, for example, seat-mounted pulleys, which are fixed on the cross-arm of the electric tower pole, and are used to spread the wires placed on the top of the insulator on the upper part of the cross-arm; hanging pulleys, which are used to pass through the hook Hanging on the insulator under the cross arm of the electric tower pole, it is used in pole assembly, wire tightening and other work; in addition, in recent years, a seat hanging pulley that combines the two functions of the seat pulley and the hanging pulley has appeared. Dual-purpose pulley, which expands the range of use of the pay-off pulley, facilitates line construction, improves work efficiency, and has been widely used in power distribution line construction.

At present, the hooks of existing hanging pulleys or seat-hanging dual-purpose pulleys rotate back and forth by about 160°, causing the hooks to easily contact the wheel grooves of the pulleys. It affects the normal deployment of the wires. If it is not discovered in time or handled improperly, it may even lead to damage to the wires, twisting and deformation of the cross arm, or tilting of the pole, causing vicious accidents.

Utility model content

In order to solve the existing technical problems, the utility model provides a pay-off pulley, which can effectively prevent the wire from being scratched by the hook.

In order to achieve the above object, the technical solution of the utility model embodiment is achieved in this way:

The pay-off pulley of the present utility model comprises a pulley, a hook, a rotating shaft, a connecting portion, and a fixing device for fixing the pay-off pulley at a certain position. Wherein, the connecting part includes two metal plates, and one end of the two metal plates of the connecting part is respectively fixed to the two ends of the pulley by a screw and a screw, and the screw passes through the central axis of the pulley and makes The pulley can freely rotate around the screw rod, and the other ends of the two metal plates of the connecting part are connected together through the rotating shaft, and the rotating shaft is parallel to the central axis of the pulley and can be relative to the The connecting part rotates, and a hinge is arranged on one of the two metal plates of the connecting part at a position between the rotating shaft and the pulley; the hook is vertically fixed to the side of the rotating shaft by screws centre position. The pay-off pulley further includes: a limiting device, which includes a limiting main body and a limiting point component that limits the rotation range of the limiting main body. Wherein, the position limiting part is arranged on the metal plate opposite to the metal plate with the hinge, the position limiting main body is located on the same side as the position limiting point part; the position limiting main body is kept vertical on the hook When the upward position is located directly below one end face of the rotating shaft and is welded together with the lower half of the end face, the side of the limiting body welded to the end face is adapted in shape to the end face, And the upper end surface of the limiting body is located on a straight line passing through the axis of the rotating shaft and perpendicular to the axis of the hook; The metal plate on the side is on the middle position above the end surface of the rotating shaft and close to the end surface.

Optionally, the limiting body is made of metal.

Optionally, when the end surface of the rotating shaft is circular, the limiting body has a limiting half-ring adapted to the end surface of the rotating shaft.

Optionally, the limiting main body is two cross bars fixed on both sides of the end surface of the rotating shaft when the hook maintains a vertical upward position, the two cross bars are located on a straight line and the straight line passes through The center of the end face of the rotating shaft is perpendicular to the axis of the hook.

Optionally, the position-limiting main body is two cross bars fixed on both sides of the rotating shaft part near the end surface of the rotating shaft when the hook maintains a vertical upward position, and the two cross bars It is located on a straight line and the straight line passes through the axis of the rotating shaft and is perpendicular to the axis of the hook.

Optionally, the limiting body is a cross bar that passes through the rotating shaft and is fixed at a position close to the end surface of the rotating shaft when the hook maintains a vertical upward position. The axis of the rotating shaft is on a straight line perpendicular to the axis of the hook.

Optionally, the limiting point component is formed by a metal welding spot with a predetermined height, and the metal welding spot with a predetermined height can limit the rotation range of the limiting body.

Optionally, the limiting point component is a nut fixed on the metal plate.

Optionally, the nut is fixedly installed on the metal plate by screws.

Description of drawings

In the drawings (which are not necessarily drawn to scale), like reference numerals may describe like parts in different views. Similar reference numbers with different letter suffixes may indicate different instances of similar components. The drawings generally illustrate the various embodiments discussed herein, by way of example and not limitation.

FIG. 1A and FIG. 1B show a schematic structural view of a pay-off pulley according to an embodiment of the present invention;

Fig. 2A shows an example diagram of a circular ring used to make a half-ring of a limiting device according to an embodiment of the present invention;

Fig. 2B shows an example diagram of two limiting half-rings formed by the circular ring of Fig. 2A;

Fig. 3 shows a schematic structural view of the hook side of the pay-off pulley including the limiting device according to an embodiment of the present invention; and

Fig. 4 shows a flowchart of a manufacturing method of the pay-off pulley of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

The pay-off pulley 100 of the present utility model mainly refers to a seat-hanging dual-purpose pulley, as shown in Figures 1A and 1B, including: a pulley 110, a hook 120, a rotating shaft 130, a connecting part 140, and is used to fix the pay-off pulley on a certain A position fixing device 150 and a limiting device 160 . In addition, views from different angles of the pay-off pulley 100 of the present invention are respectively shown in FIGS. 1A and 1B , wherein the wires laid on the groove of the pulley 110 are also shown.

Wherein, the connecting part 140 comprises two identical metal plates, and one end of the two identical metal plates of the connecting part 140 is symmetrically fixed to both ends of the pulley 110 by a screw rod and a screw respectively, and the screw rod passes through the central axis of the pulley 110 and The pulley 110 can freely rotate around the screw rod within a range of 360 degrees, and the other ends of the two metal plates of the connecting part 140 are connected together by a rotating shaft 130. The rotating shaft 130 is parallel to the central axis of the pulley 110 and can Rotating relative to the connecting portion 130, that is, the rotating shaft 130 is not fixedly connected with the other ends of the two metal plates, but rotatable. In addition, on one of the two metal plates of the connection part 140, a hinge 141 is provided at a position between the rotation shaft 130 and the pulley 110, and the hinge 141 can open the metal plate so that the wire is put therein and Ride on the wheel groove of pulley 110. Optionally, the other ends of the two metal plates of the connecting portion 140 are connected to the rotating shaft 130 by riveting, but the present invention is not limited to this connection.

The hook 120 is used to hang the pay-off pulley 100 on the cross bar of the utility pole tower in a suspended form. The hook 120 is vertically fixed to the middle position of the rotating shaft 130 by screws, so that the hook 120 can rotate around the rotating shaft 130 together with the rotating shaft 130 in a direction perpendicular to the rotating shaft 130 .

The fixing device 150 is used to fix the pay-off pulley 100 on the cross arm of the utility pole tower in a seat-mounted form. Fixing device 150 can adopt deck, as shown in Figure 1A and 1B, described deck is snapped into a certain position of the cross arm of electric pole tower, and the lower end of this deck uses screw and nut (generally more than two screws and screw) is fixed on the cross arm, so that the pay-off pulley 100 can be fixed on the cross arm of the utility pole tower through the clamp. Optionally, the fixing device 150 may also be other devices provided according to the fixed position, as long as it is convenient to fix the pay-off pulley 100 , which is not limited by the present invention. In addition, the fixing device 150 can be fixed together with the metal plate of the connecting part 140, for example, the fixing device 150 can be welded together with the metal plate below the connecting part 140, and the present invention does not limit the specific connection method between them .

The limiting device 160 is used to limit the rotation angle of the hook 120 , so that the rotation angle of the hook 120 will not be too large and touch the wire on the wheel groove of the pulley 110 . The limiting device 160 includes a limiting body 161 and a limiting point component 162 that limits the rotation range of the limiting body.

The limiting point part 162 is arranged on the metal plate opposite to the metal plate with the hinge, that is, it is arranged on the metal plate that is not equipped with the hinge 141, that is to say, the metal plate that is provided with the limiting point part 162 and the metal plate that is installed The metal plates of the hinge 141 are two different metal plates, that is, the limit point component 161 and the hinge 141 need to be located on different metal plates and cannot be located on the same metal plate. The limiting body 161 and the limiting point component 162 are located on the same side, that is, they are located on one side of the same metal plate.

The shape of the limiting body 161 depends on the shape of the end surface 131 of the rotating shaft 130 . When the end surface 131 of the rotating shaft 130 is circular, the limiting body 161 can be made of a metal semi-circular ring. For example, an annular sheet as shown in Fig. 2A can be used, here, the thickness of the annular sheet is not limited, usually it is not necessary to be too thick. Cut the donut piece shown in Figure 2A in half from the exact middle, as shown in Figure 2B. Any semicircular piece in FIG. 2B can be used as the limiting body 161 , and can be called a limiting half ring 161 . It should be noted that the diameter of the inner ring of the annular piece selected here is slightly larger than the diameter of the end face of the rotating shaft 130, so that the inner half ring of the stop half ring 161 can be well matched with the end face of the rotating shaft 130. . In this case, as shown in FIG. 3 , when the hook 120 maintains a vertical upward position, the half-limit ring 161 is located at the edge directly below the end surface of the rotating shaft 130 and is welded to the edge directly below the end surface 131 of the rotating shaft 130 superior. Specifically, when the hook 120 maintains a vertical upward position, on the end face of the rotating shaft of the hook (the end face of the rotating shaft on the side without a hinge), mark the axis of the hook and the axis of the rotating shaft perpendicular to the axis of the hook. Diameter; Then the stop half ring 161 is placed on the position just below the end face of the rotating shaft, and the stop half ring 161 is welded on the rotating shaft of the hook with electric welding.

Here, as previously mentioned, the inner half ring of the limiting half ring 161 corresponds to the end surface 131 of the rotating shaft 130 in shape, and generally, the diameter of the inner half ring of the limiting half ring 161 is slightly larger than the end surface 131 of the rotating shaft 130 In order to match the end surface 131 of the rotating shaft 130 well, it is convenient to be fixed together (for example welded together) with the lower end of the end surface 131 of the rotating shaft 130 . The width of the ring of the limiting half ring 161 is determined according to needs, and the present invention is not limited thereto. Since the limiting body 161 is welded to the end surface 131 of the rotating shaft 130 , when the rotating shaft 130 rotates, the limiting body 161 also rotates together.

Optionally, when the end face 131 of the rotating shaft 130 is circular, the side of the limiting body 161 welded to the end face 131 of the rotating shaft 130 adopts a circular shape adapted to the end face 131 of the rotating shaft 130, while the other side The side can be in any shape, not limited to a circle, for example, a square can be used, that is, the limiting body 161 can be made of an object with a half-ring side adapted to the end face 131 of the rotating shaft 130, usually Objects made of metal materials.

Optionally, when the end face 131 of the rotating shaft 130 is square, the side of the limiting body 161 welded to the end face 131 of the rotating shaft 130 adopts a square shape adapted to the end face 131 of the rotating shaft 130, while the other side ( Or claim the outside) can adopt any shape, for example can adopt circle or square etc. The present invention does not limit the outer shape of the limiting body 161 .

No matter what shape the limiting body 161 adopts, when the hook 120 maintains a vertical upward position, the upper end surface of the limiting main body 161 is located at the axis passing through the rotating shaft 130 (that is, the center of the shaft section of the rotating shaft) and perpendicular to the direction of the hook 120. on the straight line of the axis. In addition, the position-limiting main body 161 is made of metal, so as to be welded together with the end surface 131 of the rotating shaft 130 conveniently. In addition, the above-mentioned end face 131 of the rotating shaft refers to the end face of the rotating shaft on the side where the limit point component is located, in other words, the end face of the rotating shaft on the side opposite to the metal plate with the hinge.

In addition, optionally, the limiting main body 161 can also be formed by using two cross bars, and the two cross bars are fixed on both sides of the end surface 131 of the rotating shaft 130 when the hook 120 is kept vertically upward. Located on a straight line passing through the center of the end surface of the rotating shaft 130 and perpendicular to the axis of the hook 120 . For example, the two cross bars may be symmetrically welded on both sides of the end surface 131 of the rotating shaft 130 .

Optionally, the two crossbars are fixed on both sides of the rotating shaft part near the end surface 131, and the two crossbars are located on a straight line passing through the axis of the rotating shaft 130 and perpendicular to the hook 120 axis. For example, the two cross bars are welded or screwed on both sides of the axis of rotation close to the end surface 131, for example, the two cross bars can be made of threaded screws with a certain length, which are threaded symmetrically. on both sides of the axis of rotation.

Optionally, the limiting body 161 can also be a cross bar that passes through the rotating shaft 130 and is fixed on a position close to the end surface 131 of the rotating shaft 130 when the hook 120 maintains a vertical upward position. The cross bar is located on a straight line passing through the center of the rotating shaft 130 (ie, the center of the shaft surface) and perpendicular to the axis of the hook 120 . For example, the cross bar is made of a threaded screw or screw, and the screw or screw is fixed on the rotating shaft 130 by a nut.

As mentioned above, the two cross bars arranged on both sides of the end surface 131 of the rotating shaft 130 or on both sides of the rotating shaft will be blocked by the limit point part 162 when the hook 120 rotates, so that the hook 120 cannot rotate more than 90 degrees left and right.

The limit point component 162 is located on one side of the metal plate of the connecting portion 130 (ie, the metal plate on the side of the limit body 161 ), and is used to limit the rotation range of the limit body 161 . Specifically, the limit point part 162 is located on a straight line parallel to the axis of the hook 120 and passing through the axis of the rotating shaft 130 when the hook 120 maintains a vertical upward position, and is at the center of the upper part of the end surface 131 of the rotating shaft 130 As shown in FIG. 3 , that is, the limit point component 162 is located on the metal plate directly above the end surface 131 of the rotating shaft 130 and close to the end surface 131 .

Optionally, the limit point part 162 can be made of a certain size of welding spot welded on the metal plate, for example, use solder to form a certain size of welding spot at the position of the limit point part 162 as shown in Figure 3 above , The size and height of the welding spot shall be subject to the clamping of the limiting main body 161, which is not limited by the present invention. Optionally, use a grinding wheel or an angle grinder to smooth out the solder joint and/or paint it with anti-rust paint so that it is less likely to scratch other objects or operators, and less likely to rust. In addition, optionally, the limiting point part 162 may also be formed by a nut mounted on a metal plate through screws, and the size of the nut is determined to be able to lock the rotation of the limiting main body 161 . Here, only two optional structures of the limiting point component 162 are given, but the present invention does not limit the specific form of the limiting point component 162 .

As mentioned above, when the seat-mounted function of the pay-off pulley 100 of the present utility model is fixed on the cross arm of the utility pole tower, its hook 120 is in an unused state. In this case, the described hook 120 may Rotate around the rotating shaft 130, yet, because the limit point part 162 is positioned on the metal plate directly above the end face 131 of the rotating shaft 130, so when the hook 120 rotates, the limit point welded on the end face 131 of the rotating shaft 130 directly below When the main body 161 rotates clockwise or counterclockwise to 90 degrees at most, it is blocked by the limit point part 162, so that the hook 120 can only be limited to rotate within the range of 90 degrees left and right, and will not Rotate to below the rotating shaft 130, so it will not touch the wires located on the wheel groove of the pulley 110, so as not to damage the wires, ensuring the safety of the construction process.

Utilize this utility model, by installing limiter 160 at one end of the rotation shaft 130 of the hook 120 of the pay-off pulley 100, the rotation angle of the hook 120 of the pay-off pulley 100 is limited within the range of 90° left and right, which can solve the problem of release. The problem that the hook 120 scratches the wire when the wire pulley 100 is installed in the seat is used.

The pay-off pulley (or the limiting device of the pay-off pulley) of the present utility model is made by following method 400:

In step S410, measure the size of the diameter of the rotating shaft of the hook of the pay-off pulley;

In step S420, the ring made of metal corresponding to the diameter of the rotating shaft of the hook is divided into two along its diameter to obtain a half ring, such as a flat ring with a round hole (such as a flat washer) . For example, split the ring in two using snips or a hacksaw;

In step S430, adjust the hook of the pay-off pulley so that it maintains a vertical upward position, and on the end face of one end of the rotating shaft of the hook (the end face on the side that does not have a comprehensive metal plate), mark the center of the hook through the center of the end face. the axis and the diameter of the axis of rotation perpendicular to the axis of the hook;

In step S440, place the half ring obtained in step S420 directly below the rotation shaft, and weld the half ring to the rotation shaft of the hook by electric welding;

In step S450, welding spot is welded by electric welding at the position of the axis of the hook marked in step S430 that is directly above the end surface of the rotation shaft of the hook, that is, a limiting point component is formed. Preferably, use a grinding wheel or an angle grinder to smooth out the solder joints and apply an anti-rust paint.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

In addition, what is described above is only the principles and preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, several other modifications can be made on the basis of the principle of the utility model, and these modifications are also deemed to fall within the protection scope of the utility model.

In addition, those skilled in the art can understand that the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

Claims (9)

1. pulley block, including pulley, hook, rotary shaft, connecting portion and for pulley block is fixed on a certain position Fixing device, wherein,

Described connecting portion includes two pieces of metallic plates, and one end of two pieces of metallic plates of described connecting portion is solid by screw rod and screw respectively Due to the two ends of described pulley, described screw rod passes the central axis of described pulley and enables described pulley around described screw rod certainly By rotating, the other end of two pieces of metallic plates of described connecting portion is linked together by described rotary shaft, and described rotary shaft is parallel In the central axis of described pulley and can rotate relative to described connecting portion, at one of two metallic plates of described connecting portion Position upper, between described rotary shaft and described pulley is provided with hinge；Described hook is perpendicularly fixed at institute by screw State the centre position of rotary shaft, it is characterised in that described pulley block also includes:

Stopping means, it includes spacing main body and limits the limit point parts of amplitude that described spacing main body rotates, wherein,

Described limit point parts are arranged on the metallic plate relative with the metallic plate with hinge, described spacing main body and described limit Site parts are positioned at same side；

Described spacing main body is positioned at the underface of the end face of described rotary shaft when described hook keeps position vertically upward And weld together with lower one side of something of described end face, the side that described spacing main body is welded with described end face and described end face are in shape Adapt on shape, and the upper surface of described spacing main body is positioned at the axle center by described rotary shaft and is perpendicular to described hook axis Straight line on；

Described limit point parts are positioned on the metallic plate of side, spacing main body place when described hook keeps position vertically upward And above the end face of described rotary shaft on center position and against described end face.

Pulley block the most according to claim 1, it is characterised in that described spacing main body is made by metal.

Pulley block the most according to claim 1 and 2, it is characterised in that when the end face of described rotary shaft is circle, institute State spacing main body by the spacing semi-ring adapted with the end face of described rotary shaft.

Pulley block the most according to claim 1 and 2, it is characterised in that described spacing main body is to keep at described hook Be fixed on two cross bars of the end face both sides of described rotary shaft during position vertically upward, said two cross bar be positioned at one straight On line and this straight line is through the end face center of described rotary shaft and the axis that is perpendicular to described hook.

Pulley block the most according to claim 1 and 2, it is characterised in that described spacing main body is to keep at described hook Two cross bars of the both sides of the described rotary shaft part of the end face near described rotary shaft, institute it is fixed on during position vertically upward State two cross bars to be positioned on straight line and this straight line is through the axle center of described rotary shaft and the axis that is perpendicular to described hook.

Pulley block the most according to claim 1 and 2, it is characterised in that described spacing main body is to keep at described hook Run through described rotary shaft during position vertically upward and be fixed on the horizontal stroke of the position near its end face of described rotary shaft On the straight line of bar, axle center that described cross bar is located across described rotary shaft and the axis that is perpendicular to described hook.

Pulley block the most according to claim 1 and 2, it is characterised in that described limit point parts are by having predetermined altitude Metal welding point formed, the metal solder joint of described predetermined altitude can limit the rotational steps of described spacing main body.

Pulley block the most according to claim 1 and 2, it is characterised in that described limit point parts are for being fixed on described gold Belong to the nut on plate.

Pulley block the most according to claim 8, it is characterised in that described nut is fixedly mounted on described gold by screw Belong on plate.