Paying-off tackle capable of adjusting tension

Abstract

The utility model discloses a tension-adjustable paying-off tackle, which relates to the technical field of paying-off tackles, comprises a bracket, a hanging plate arranged on the bracket, and a pulley which is rotatably arranged on the inner side of the bracket through a supporting shaft, and is characterized in that folding arms which are symmetrically distributed are arranged on the side surface of the bracket, and two wire guide wheels are arranged in the folding arms; an adjusting mechanism is installed on the hanging plate, the adjusting mechanism controls the folding arm to fold so that the two wire guide wheels can move, and a plurality of sets of elastic tensioning mechanisms are installed on the folding arm and connected with the corresponding wire guide wheels respectively. The positions of the two wire guide wheels on the front arm and the rear arm are changed through the adjusting mechanism, the tension adjusting requirements in different working scenes are met, the tension can be automatically adjusted according to load changes in combination with the elastic tensioning mechanism, and it is ensured that a wire is always kept in a stable tension state in the pulling process.

Description

Technical Field

[0001] The utility model relates to the technical field of wire-paying pulleys, in particular to a wire-paying pulley with adjustable tension. Background Art

[0002] In the power, communications and other industries, wire-laying pulleys are commonly used tools and equipment. Their main function is to provide necessary support and guidance during the wire pulling and laying process to ensure that the wire can be laid along the predetermined path.

[0003] At present, most of the existing cable-laying pulleys extend and lay the cables through pulleys. However, the cable tension cannot be automatically adjusted according to changes in cable thickness, material, and pulling speed during transportation. As a result, the cable is easily damaged due to excessive tension or becomes loose due to insufficient tension during the pulling and laying process, affecting operating efficiency and cable quality. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to propose a tension-adjustable wire-paying pulley.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A tension-adjustable wire-paying pulley comprises a bracket, a hanging plate mounted on the bracket, and a pulley rotatably arranged inside the bracket via a support shaft. The bracket is provided with symmetrically distributed folding arms, two wire guide pulleys are arranged in the folding arms, an adjustment mechanism is mounted on the hanging plate, the adjustment mechanism controls the folding arms to fold so as to displace the two wire guide pulleys, and multiple sets of elastic tensioning mechanisms are mounted on the folding arms, each of which is connected to a corresponding wire guide pulley.

[0007] Each folding arm includes a forearm and a rear arm, one end of the forearm is hinged to the bracket, and the other end of the forearm is hinged to one end of the rear arm.

[0008] Preferably, both the front arm and the rear arm are provided with through slots, and both ends of the guide wheel pass through the corresponding through slots respectively, and the guide wheel can slide along the length direction of the through slots.

[0009] Preferably, the adjustment mechanism includes a screw rotatably arranged on the hanging plate, a nut is threadedly connected to the outer wall of the screw, a cross bar is fixedly connected to the lower part of the nut, and the end of the rear arm away from the forearm is hinged to the end of the cross bar.

[0010] Preferably, the elastic tensioning mechanism includes a fixed box correspondingly installed on the forearm and the rear arm, a connecting rod is inserted into the side of the fixed box, one end of the connecting rod passes through the fixed box and is fixedly sleeved with a skateboard, the skateboard is slidably arranged in the fixed box, the other end of the connecting rod is fixedly connected to the shaft sleeve, the end of the wire wheel passes through the shaft sleeve and is rotatable between the shaft sleeve, and a compression spring I is fixedly connected between one side of the skateboard and the inner wall of the fixed box.

[0011] Preferably, a baffle is fixedly sleeved on the outer wall of the connecting rod, the baffle is located between the shaft sleeve and the fixed box, and a compression spring II sleeved on the outer side of the connecting rod is fixedly connected between the baffle and the fixed box.

[0012] Preferably, one end of the screw rod away from the hanging plate is fixedly connected to the limiting ring, and when the nut contacts the limiting ring, the lowest point of the wire roller on the forearm is located below the highest point of the pulley.

[0013] Preferably, an adjusting wheel is fixedly sleeved on the outer wall of the screw.

[0014] The folding arm, adjustment mechanism and guide wheel in this application can be symmetrically arranged in two groups on the bracket. This application takes one group as an example.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. In this application, through the cooperation of the screw, nut and cross bar, the rotation of the screw causes the nut to drive the cross bar to move, so that the angle between the rear arm and the forearm can be changed, thereby changing the position of the two wire pulleys on the forearm and the rear arm, meeting the tension adjustment requirements in different working scenarios.

[0017] 2. In the present application, when the wire is pulled, a force is applied to the wire wheel, and the generated force is transmitted from the wire wheel to the shaft sleeve, thereby causing the connecting rod to drive the slide plate and the baffle to generate a movement trend. The slide plate and the baffle act on the compression spring I and the compression spring II respectively. Through the coordinated use of the compression spring I and the compression spring II, the tension can be automatically adjusted according to the load change, ensuring that the wire always maintains a stable tension state during the pulling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model provides a schematic diagram of the three-dimensional structure of a tension-adjustable wire-paying pulley;

[0019] Figure 2 The utility model provides a partial structural diagram of a tension-adjustable wire-paying pulley;

[0020] Figure 3 The utility model provides a partial cross-sectional structural diagram of an elastic tensioning mechanism of a wire-paying pulley with adjustable tension;

[0021] Figure 4The utility model provides a planar schematic diagram of a conductor passing through a tension-adjustable wire-paying pulley.

[0022] Legend: 1. Bracket; 2. Hanging plate; 3. Support shaft; 4. Pulley; 5. Folding arm; 51. Front arm; 52. Rear arm; 53. Through slot; 6. Guide wheel; 7. Adjusting mechanism; 71. Screw; 72. Nut; 73. Cross bar; 74. Limiting ring; 75. Adjusting wheel; 8. Elastic tensioning mechanism; 81. Fixing box; 82. Connecting rod; 83. Slide plate; 84. Bushing; 85. Compression spring I; 86. Baffle; 87. Compression spring II. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] like Figure 1-4 As shown, the utility model provides a tension-adjustable wire-paying pulley, comprising a bracket 1, a hanging plate 2 mounted on the bracket 1, a pulley 4 rotatably arranged on the inner side of the bracket 1 through a support shaft 3, symmetrically distributed folding arms 5 are mounted on the side of the bracket 1, two wire pulleys 6 are arranged in the folding arm 5, an adjusting mechanism 7 is mounted on the hanging plate 2, the adjusting mechanism 7 controls the folding arm 5 to fold so that the two wire pulleys 6 are displaced, a plurality of groups of elastic tensioning mechanisms 8 are mounted on the folding arm 5, and the plurality of groups of elastic tensioning mechanisms 8 are respectively connected to the corresponding wire pulleys 6, each folding arm 5 comprises a forearm 51 and a rear arm 52, one end of the forearm 51 is hinged to the bracket 1, and the other end of the forearm 51 is hinged to one end of the rear arm 52.

[0026] In this embodiment, a through slot 53 is provided on both the front arm 51 and the rear arm 52. The two ends of the wire pulley 6 pass through the corresponding through slots 53 respectively. The wire pulley 6 can slide along the length direction of the through slot 53. The wire pulley 6 has a certain displacement and is used in conjunction with the elastic tensioning mechanism 8.

[0027] In this embodiment, the adjustment mechanism 7 includes a screw rod 71 rotatably arranged on the hanging plate 2, a nut 72 is threadedly connected to the outer wall of the screw rod 71, and a cross bar 73 is fixedly connected to the lower part of the nut 72. The end of the rear arm 52 away from the front arm 51 is hinged to the end of the cross bar 73. The screw rod 71 rotates and the nut 72 is driven by the thread to move along the screw rod 71. The nut 72 drives the cross bar 73 to move to pull the rear arm 52, so that the angle between the rear arm 52 and the front arm 51 changes, thereby realizing the adjustment of the position of the wire wheel 6.

[0028] In this embodiment, the elastic tensioning mechanism 8 includes a fixed box 81 correspondingly installed on the front arm 51 and the rear arm 52. A connecting rod 82 is inserted into the side of the fixing box 81. One end of the connecting rod 82 passes through the fixing box 81 and is fixedly sleeved with a slide plate 83. The slide plate 83 is slidably set in the fixing box 81. The other end of the connecting rod 82 is fixedly connected to a shaft sleeve 84. The end of the wire wheel 6 passes through the shaft sleeve 84 and is rotatable between the shaft sleeve 84. A compression spring I 85 is fixedly connected between one side of the slide plate 83 and the inner wall of the fixing box 81. When the wire acts on the wire wheel 6, the generated force will be transmitted from the wire wheel 6 to the shaft sleeve 84, and then the connecting rod 82 drives the slide plate 83 to act on the compression spring I 85. The compression spring I 85 generates a reverse elastic force to act on the slide plate 83, which can automatically adjust the tension according to the load change, calmly maintain a stable working state, and avoid too low or too high tension due to load fluctuations.

[0029] In this embodiment, a baffle 86 is fixedly sleeved on the outer wall of the connecting rod 82, and the baffle 86 is located between the shaft sleeve 84 and the fixed box 81. A compression spring II 87 sleeved on the outside of the connecting rod 82 is fixedly connected between the baffle 86 and the fixed box 81. When the connecting rod 82 drives the slide plate 83 to act on the compression spring I 85, the connecting rod 82 also drives the baffle 86 to make the compression spring II 87 subject to force, and the compression spring II 87 generates a reverse elastic force acting on the baffle 86, which further cooperates with the compression spring I 85 to automatically adjust the tension according to the load change.

[0030] In this embodiment, the end of the screw 71 away from the hanging plate 2 is fixedly connected to the limiting ring 74. When the nut 72 contacts the limiting ring 74, the lowest point of the wire roller on the forearm 51 is located below the highest point of the pulley 4. The nut 72 is limited by the limiting ring 74 to prevent the nut 72 and the screw 71 from separating, while ensuring that the wire roller on the forearm 51 can always act on the wire.

[0031] In this embodiment, an adjusting wheel 75 is fixedly sleeved on the outer wall of the screw 71, and the adjusting wheel 75 facilitates the rotation of the screw 71. At the same time, the screw 71 can also be electrically driven by installing a motor connected to its end on the hanging plate 2. This is a well-known method in the technical field and will not be elaborated on here.

[0032] How to use and working principle of this device:

[0033] When the device is in use, the wire passes over the pulley 4 and passes around the two wire pulleys 6 in sequence. The screw 71 rotates and the nut 72 moves along the screw 71 through the threaded transmission. The nut 72 drives the cross bar 73 to move, pulling the rear arm 52, so that the angle between the rear arm 52 and the front arm 51 changes. The positions of the two wire pulleys 6 located on the front arm 51 and the rear arm 52 change, and the wire pulleys 6 act on the wire to adjust its tension.

[0034] After the above adjustment is completed, when the wire is pulled, the wire will generate a force on the wire wheel 6, and the generated force will be transmitted from the wire wheel 6 to the shaft sleeve 84, thereby causing the connecting rod 82 to drive the slide plate 83 and the baffle 86 to generate a movement trend. The slide plate 83 and the baffle 86 act on the compression spring I 85 and the compression spring II 87 respectively, and the compression spring I 85 and the compression spring II 87 generate reverse elastic forces and act on the slide plate 83 and the baffle 86 respectively. The tension can be automatically adjusted according to the load change, and a stable working state can be calmly maintained to avoid excessive low or high tension due to load fluctuations.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A tension-adjustable pay-off pulley, comprising a bracket (1), a hanging plate (2) mounted on the bracket (1), and a pulley (4) rotatably arranged on the inner side of the bracket (1) via a support shaft (3), characterized in that: A symmetrically distributed folding arm (5) is installed on the side of the bracket (1), two wire wheels (6) are arranged in the folding arm (5), an adjustment mechanism (7) is installed on the hanging plate (2), the adjustment mechanism (7) controls the folding arm (5) to fold so that the two wire wheels (6) are displaced, and multiple groups of elastic tensioning mechanisms (8) are installed on the folding arm (5), and the multiple groups of elastic tensioning mechanisms (8) are respectively connected to corresponding wire wheels (6); Each folding arm (5) comprises a front arm (51) and a rear arm (52), one end of the front arm (51) is hinged to the bracket (1), and the other end of the front arm (51) is hinged to one end of the rear arm (52).

2. A tension-adjustable pay-off pulley according to claim 1, characterized in that: A through slot (53) is provided on the front arm (51) and the rear arm (52), and two ends of the guide wheel (6) pass through the corresponding through slots (53) respectively, and the guide wheel (6) can slide along the length direction of the through slot (53).

3. A tension-adjustable pay-off pulley according to claim 2, characterized in that: The adjusting mechanism (7) comprises a screw rod (71) rotatably arranged on the hanging plate (2); a nut (72) is threadedly connected to the outer wall of the screw rod (71); a cross bar (73) is fixedly connected to the lower portion of the nut (72); and one end of the rear arm (52) away from the front arm (51) is hinged to the end of the cross bar (73).

4. A tension-adjustable pay-off pulley according to claim 1, characterized in that: The elastic tensioning mechanism (8) comprises a fixing box (81) correspondingly mounted on the front arm (51) and the rear arm (52), a connecting rod (82) is inserted into the side of the fixing box (81), one end of the connecting rod (82) passes through the fixing box (81) and is fixedly sleeved with a slide plate (83), the slide plate (83) is slidably arranged in the fixing box (81), the other end of the connecting rod (82) is fixedly connected with a shaft sleeve (84), the end of the guide wheel (6) passes through the shaft sleeve (84) and is rotatable between the shaft sleeve (84), and a compression spring I (85) is fixedly connected between one side of the slide plate (83) and the inner wall of the fixing box (81).

5. A tension-adjustable pay-off pulley according to claim 4, characterized in that: A baffle (86) is fixedly sleeved on the outer wall of the connecting rod (82), and the baffle (86) is located between the shaft sleeve (84) and the fixed box (81). A compression spring II (87) sleeved on the outer side of the connecting rod (82) is fixedly connected between the baffle (86) and the fixed box (81).

6. A tension-adjustable pay-off pulley according to claim 3, characterized in that: One end of the screw rod (71) away from the hanging plate (2) is fixedly connected to the limiting ring (74). When the nut (72) contacts the limiting ring (74), the lowest point of the wire roller on the forearm (51) is located below the highest point of the pulley (4).

7. A tension-adjustable pay-off pulley according to claim 3, characterized in that: An adjusting wheel (75) is fixedly sleeved on the outer wall of the screw rod (71).

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