I-spool automatic tensioning mechanism

Abstract

The automatic tensioning mechanism of the I-shaped wheel of the present invention comprises a main shaft, which comprises a main body and an insertion part, wherein the main body has a first space inside, and the insertion part has a second space inside, a rotating rod is provided at one end of the main body, one end of the rotating rod is arranged in the first space, and the other end extends from the opening end of the first space, a long pull rod runs through the first space and the second space, one end of the long pull rod is threadedly connected to the end of the rotating rod, and the other end is connected to the tensioning shaft head, an tensioning spring is provided on the outside of the long pull rod in the first space, one end of the tensioning spring contacts the bottom surface of the first space, and the other end contacts the end surface of the rotating rod, and the insertion part comprises an integrally arranged connecting part, a frustum part and a cylindrical part in sequence, one end of the connecting part is fixedly connected to the main body, a step part is provided between the connecting part and the frustum part, the farther the frustum is from the main body, the smaller the radius is, and a tensioning sleeve is sleeved on the cylindrical part. The present invention can quickly realize the tensioning and clamping of the I-shaped wheel, and the structure is simple and practical.

Description

Technical Field

[0001] The invention relates to automatic expansion, in particular to an automatic expansion mechanism for an I-shaped wheel. Background Art

[0002] The wire take-up machine equipment is mainly used for wire take-up in the production process of optical fiber and cable; wire take-up in the production process of series wire, twisted pair and cabling of data communication cable; it is also suitable for wire take-up of radio frequency cable, high braiding machine, high twisting machine, extruder and winding machine, etc. of electric wire and cable, and has a wide range of uses.

[0003] At the same time, in actual production, we found that when two I-spools are placed in parallel to achieve automatic disc changing without stopping, the distance between the two I-spools is large, and sometimes the idle wheel at the back cannot be wound. By placing the two I-spools in series, the bottom surfaces of the two I-spools can be pulled to a very close distance, which greatly reduces the probability of this situation. The traditional clamping method, with the two sides fixed on the top, occupies a lot of space on both sides of the I-spool axis and has a relatively complex structure, making it more difficult to change the disc in series with the I-spools. Summary of the invention

[0004] In order to solve the problem of complex structure of the traditional clamping method of the I-shaped wheel, the present invention provides an automatic tensioning mechanism for the I-shaped wheel to solve the above problem.

[0005] The automatic tensioning mechanism of an I-shaped wheel of the present invention comprises a hollow main shaft, wherein the main shaft comprises an integral main body and an insertion part, wherein the main body has a first space inside, and the insertion part has a second space inside, wherein the first space and the second space are two through-going cylindrical spaces with different bottom radii, wherein the bottom radius of the first space is greater than the bottom radius of the second space, and the bottom surfaces of the first space and the second space are concentrically arranged, wherein a rotating rod is arranged at one end of the main body, wherein one end of the rotating rod is arranged in the first space, and the other end extends out from the opening end of the first space, wherein a long pull rod extends through the first space and the second space, wherein one end of the long pull rod extends into the first space and is threadedly connected to the end of the rotating rod, and the other ... first space and the second space are connected. The end extends out from the open end of the second space and is connected to a tensioning shaft head. A tensioning spring is provided on the outside of the long pull rod in the first space. One end of the tensioning spring contacts the bottom surface of the first space, and the other end contacts the end surface of the rotating rod. The insertion part comprises an integral connecting part, a frustum part and a cylindrical part in sequence. One end of the connecting part is fixedly connected to the main body. A step part is provided between the connecting part and the frustum part. The farther the frustum part is from the main body, the smaller the radius is. A tensioning sleeve is provided on the cylindrical part. It also includes a cylinder, which is used to loosen and tighten by telescoping the cylinder. When the cylinder is extended, it pushes the rotating rod and the long pull rod to drive the tensioning shaft head to move forward. When the cylinder is retracted, the top driven by the cylinder is out of contact with the rotating rod.

[0006] Specifically, a guide device is provided between the cylindrical portion and the expansion sleeve to guide the expansion sleeve to move axially along the cylindrical portion. The guide device includes a guide key and a keyway cooperating with the guide key. The guide key is arranged on the cylindrical portion, and the keyway is arranged on the inner wall of the expansion sleeve.

[0007] Furthermore, a traction disk is provided at one end of the main body close to the insertion portion, the main body is arranged perpendicular to the traction disk, and a plurality of limit devices are circumferentially arranged on the traction disk to prevent the I-shaped wheel from rotating along the insertion portion, each limit device includes a telescopic rod, a limit head and a first return spring arranged in the traction disk, the telescopic rod is parallel to the main axis, one end of the telescopic rod is fixedly connected to the traction disk, and the other end is fixedly connected to the limit head, a first return spring is provided on the telescopic rod, one end of the first return spring is in contact with the limit head, and the other end is in contact with the traction disk.

[0008] In order to make the expansion shaft head and the long pull rod move in linkage, the expansion shaft head and the long pull rod are fixed by an elastic cylindrical pin.

[0009] Specifically, a second reset spring for resetting the expansion sleeve is provided between the expansion sleeve and the step portion.

[0010] The expansion shaft head is in the shape of a frustum.

[0011] The beneficial effects of the present invention are as follows: (1) It can quickly realize the expansion and clamping of the I-shaped wheel, and the structure is simple and practical. (2) The inner hole cantilever clamping only needs to be operated on one side of the I-shaped wheel axis, which saves space and is convenient for placing two I-shaped wheels in series. (3) The traction disc can not only prevent the I-shaped wheel from moving in the circumferential direction when not in operation, and the line cannot be pulled tight, but also limit the depth of the main shaft inserted into the inner hole of the I-shaped wheel. (4) According to different situations, the size of the expansion force can be adjusted by rotating the thread between the long pull rod and the rotating rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the structure of the automatic expansion mechanism of the I-shaped wheel of the present invention.

[0013] In the figure: 1-main body; 2-insertion part; 3-first space; 4-second space; 5-rotary rod; 6-long pull rod; 7-expansion shaft head; 8-expansion spring; 9-expansion sleeve; 10-guide device; 11-traction disk; 12-limiting device; 13-telescopic rod; 14-limiting head; 15-first return spring; 16-elastic cylindrical pin; 17-second return spring; 21-connecting part; 22-cone part; 23-cylindrical part; 24-step part. DETAILED DESCRIPTION

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0015] like Figure 1 As shown, the automatic tensioning mechanism of the I-shaped wheel of the present invention comprises a hollow main shaft, which comprises an integral main body 1 and an inserting part 2. The main body 1 has a first space 3 inside, and the inserting part 2 has a second space 4 inside. The first space 3 and the second space 4 are two through cylindrical spaces with different bottom radii. The bottom radius of the first space 3 is greater than the bottom radius of the second space 4, and the bottom surfaces of the first space 3 and the second space 4 are concentrically arranged. A rotating rod 5 is arranged at one end of the main body 1. One end of the rotating rod 5 is arranged in the first space 3, and the other end extends from the opening end of the first space 3. A long pull rod 6 runs through the first space 3 and the second space 4. One end of the long pull rod 6 extends into the first space 3 and is threadedly connected to the end of the rotating rod 5, and the other end extends from the second space The open end of 4 extends outward and is connected with a tightening shaft head 7. A tightening spring 8 is arranged on the outer side of the long pull rod 6 in the first space 3. One end of the tightening spring 8 contacts the bottom surface of the first space 3, and the other end contacts the end surface of the rotary rod 5. The insertion portion 2 is sequentially integrally provided with a connecting portion 21, a frustum portion 22 and a cylindrical portion 23. One end of the connecting portion 21 is fixedly connected to the main body 1. A step portion 24 is provided between the connecting portion 21 and the frustum portion 22. The farther the frustum portion 22 is from the main body 1, the smaller the radius. An expansion sleeve 9 is sleeved on the cylindrical portion 23. It also includes a cylinder, which is used to loosen and tighten by telescoping the cylinder. When the cylinder is extended, it pushes the rotary rod 5 and the long pull rod 6, driving the tightening shaft head 7 to move forward. When the cylinder is retracted, the top driven by the cylinder is out of contact with the rotary rod 5.

[0016] A guide device 10 is provided between the cylindrical portion 23 and the expansion sleeve 9 to guide the expansion sleeve 9 to move axially along the cylindrical portion 23. The guide device 10 includes a guide key and a keyway cooperating with the guide key. The guide key is provided on the cylindrical portion 23, and the keyway is provided on the inner wall of the expansion sleeve 9.

[0017] A traction disk 11 is provided at one end of the main body 1 close to the insertion portion 2. The main body 1 is arranged perpendicular to the traction disk 11. A plurality of limit devices 12 are arranged circumferentially on the traction disk 11 to prevent the I-shaped wheel from rotating along the insertion portion 2. Each limit device 12 includes a telescopic rod 13, a limit head 14 and a first return spring 15 arranged in the traction disk 11. The telescopic rod 13 is parallel to the main axis, one end of the telescopic rod 13 is fixedly connected to the traction disk 11, and the other end is fixedly connected to the limit head 14. A first return spring 15 is provided on the telescopic rod 13, one end of the first return spring 15 is in contact with the limit head 14, and the other end is in contact with the traction disk 11.

[0018] In order to make the expansion shaft head 7 and the long pull rod 6 move in linkage, the expansion shaft head 7 and the long pull rod 6 are fixed by an elastic cylindrical pin 16 .

[0019] A second return spring 17 for returning the expansion sleeve 9 is provided between the expansion sleeve 9 and the step portion 24. The expansion shaft head 7 is in a frustum shape.

[0020] Working principle: Before use, the tightening force can be adjusted by rotating the rotary rod 5 according to the actual situation, and the cylinder can be extended and retracted for loosening and tightening. When the cylinder is extended, it pushes the rotary rod 5 and the long pull rod 6, driving the tightening shaft head 7 to move forward, and the tightening sleeve 9 shrinks toward the middle along with the inclined surface of the tightening shaft head 7 and the frustum 22, and the I-shaped wheel is loosened; when the cylinder retracts, the top driven by the cylinder disengages from the contact with the rotary rod 5, and the tightening shaft head 7 and the long pull rod 6 automatically retract under the action of the tightening spring 8, and the tightening shaft head 7 also retracts, and the tightening sleeve 9 also climbs along with the inclined surface on the tightening shaft head 7 and the frustum 22, and the I-shaped wheel is tightened. In the tightened state, the cylinder is completely out of contact with the main shaft, and the operation is safer and more reliable.

[0021] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An automatic expansion mechanism for an I-shaped wheel, characterized in that: It comprises a hollow main shaft, which comprises an integral main body and an insertion part, wherein the main body has a first space inside, and the insertion part has a second space inside, the first space and the second space are two cylindrical spaces with different bottom radii that are connected, the bottom radius of the first space is larger than the bottom radius of the second space, and the bottom surfaces of the first space and the second space are concentrically arranged, a rotating rod is arranged at one end of the main body, one end of the rotating rod is arranged in the first space, and the other end extends from the opening end of the first space, a long pull rod passes through the first space and the second space, one end of the long pull rod extends into the first space and is threadedly connected to the end of the rotating rod, and the other end extends from the second space The open end of the space extends out and is connected with a tensioning shaft head, a tensioning spring is provided on the outside of the long pull rod in the first space, one end of the tensioning spring contacts the bottom surface of the first space, and the other end contacts the end surface of the rotating rod, the insertion part comprises an integral connecting part, a frustum part and a cylindrical part in sequence, one end of the connecting part is fixedly connected to the main body, a step part is provided between the connecting part and the frustum part, the radius of the frustum part is smaller as it is farther away from the main body, and a tensioning sleeve is provided on the cylindrical part; it also includes a cylinder, which is used to loosen and tighten by telescoping the cylinder, when the cylinder is extended, it pushes the rotating rod and the long pull rod, driving the tensioning shaft head to move forward, when the cylinder is retracted, the top driven by the cylinder is out of contact with the rotating rod.

2. The automatic tensioning mechanism for an I-shaped wheel according to claim 1, characterized in that: A guide device is provided between the cylindrical part and the expansion sleeve to guide the expansion sleeve to move axially along the cylindrical part. The guide device includes a guide key and a keyway matched with the guide key. The guide key is arranged on the cylindrical part, and the keyway is arranged on the inner wall of the expansion sleeve.

3. The automatic tensioning mechanism for an I-shaped wheel according to claim 2, characterized in that: A traction disk is provided at one end of the main body close to the insertion part, the main body is arranged perpendicular to the traction disk, and a plurality of limit devices are circumferentially arranged on the traction disk to prevent the I-shaped wheel from rotating along the insertion part, each limit device comprises a telescopic rod, a limit head and a first return spring arranged in the traction disk, the telescopic rod is parallel to the main axis, one end of the telescopic rod is fixedly connected to the traction disk, and the other end is fixedly connected to the limit head, a first return spring is provided on the telescopic rod, one end of the first return spring is in contact with the limit head, and the other end is in contact with the traction disk.

4. The automatic tensioning mechanism for an I-shaped wheel as claimed in claim 3, characterized in that: The expansion shaft head and the long pull rod are fixed by an elastic cylindrical pin.

5. The automatic tensioning mechanism for an I-shaped wheel as claimed in claim 4, characterized in that: A second reset spring for resetting the expansion sleeve is arranged between the expansion sleeve and the step portion.

6. The automatic tensioning mechanism for an I-shaped wheel according to claim 5, characterized in that: The expansion shaft head is in the shape of a frustum.

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