tensioning mechanism

Abstract

The utility model discloses a kind of tensioning mechanisms, comprising: with the tensioning body of accommodating cavity, tensioning body is along its circumferential interval arrangement multiple with the through slot of accommodating cavity intercommunication;Multiple tensioning pieces, tensioning piece is slidably arranged in the through slot of tensioning body along radial, the inner end surface of tensioning piece is equipped with first inclined surface, tensioning piece and tensioning body between setting tensioning reset spring that stretches and contracts along radial;Multiple guide pieces, multiple guide pieces interval arrangement are in the outer periphery of tensioning body;Cam piece, cam piece is movably arranged in the accommodating cavity of tensioning body along the axial direction of tensioning body, the outer peripheral surface of cam piece is equipped with second inclined surface with first inclined surface adaptation.The utility model's tensioning piece in reset state, tensioning piece is lower than guide piece, the installation of adhesive tape is facilitated, tensioning piece can also be higher than guide piece, to facilitate the tensioning fixation of compatible multiple adhesive tapes, installation, convenient to change material, can keep stable tension all the time.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical automation technical field, concretely is a kind of tensioning mechanism. BACKGROUND

[0002] The existing tensioning mechanism can only rely on the friction force generated by extrusion and chamfer or external fixation to fix the adhesive tape, so there are problems of unstable adhesive tape fixation or complex installation steps, and when the model of adhesive tape is replaced, the tensioning mechanism also needs to be replaced, which consumes more manpower and material resources. INVENTION CONTENTS

[0003] In order to solve the problems in the prior art, the utility model provides a tensioning mechanism. The guide piece is arranged to guide the placement of the adhesive tape, so that the adhesive tape can be more accurately fastened on the tensioning piece. When the tensioning piece is in the reset state, the tensioning piece is lower than the guide piece, so that the adhesive tape is conveniently installed. The tensioning piece can also extend outwardly along the radial direction of the tensioning body to be higher than the guide piece, so as to tightly fix the adhesive tape outside the space formed by the plurality of tensioning pieces. The tensioning mechanism is compatible with the tensioning and fixation of multiple adhesive tapes, and is convenient to install and replace. The stable tension can be maintained at all times.

[0004] The utility model discloses a tensioning mechanism which comprises a tensioning body, a plurality of guide pieces and a cam member.

[0005] The tensioning mechanism comprises:

[0006] The tensioning body has a hollow accommodating cavity. A plurality of through grooves are arranged at intervals along the circumference of the tensioning body and are in communication with the accommodating cavity. The through grooves extend along the radial direction of the tensioning body to the outer peripheral surface of the tensioning body.

[0007] A plurality of tensioning pieces are arranged in the through grooves of the tensioning body in a sliding manner along the radial direction. The number of the tensioning pieces is consistent with the number of the through grooves. The inner end surface of each tensioning piece is provided with a first inclined surface. The first inclined surface forms an inclined angle with the axial direction of the tensioning body. A tensioning reset spring is arranged between the tensioning piece and the tensioning body and can extend and contract along the radial direction.

[0008] A plurality of guide pieces are arranged at intervals on the outer periphery of the tensioning body.

[0009] The cam member is movably arranged in the accommodating cavity of the tensioning body along the axial direction of the tensioning body. The outer peripheral surface of the cam member is provided with a second inclined surface which is adapted to the first inclined surface.

[0010] When the cam member moves along the axial direction of the tensioning body, the tensioning piece moves along the radial direction of the tensioning body; when the tensioning piece moves to the outermost position along the radial direction of the tensioning body, the height of the tensioning piece is higher than the height of the guide piece; when the tensioning piece moves to the innermost position along the radial direction of the tensioning body, the height of the tensioning piece is lower than the height of the guide piece.

[0011] The number of the guide pieces is consistent with the number of the tensioning pieces, and the guide pieces are located on one side of the tensioning pieces.

[0012] The outer circumferential surface of the tensioning body is in an octagonal structure, and the number of the tensioning pieces and the number of the guide pieces are both four, and the tensioning pieces and the guide pieces are both arranged on the outer circumferential surface of the tensioning body in a spaced manner.

[0013] The guide piece comprises a connecting portion, a bending portion and a supporting portion which are sequentially connected, the bending portion and the connecting portion are at an angle of 120°, the supporting portion is perpendicular to the bending portion, the connecting portion is arranged on the surface of the tensioning body adjacent to the tensioning piece, and the supporting portion is parallel to the tensioning piece.

[0014] The outer end of the tensioning piece and the outer end of the guide piece are both provided with a limiting portion extending along the axial direction of the tensioning body, and the limiting portion of the tensioning piece is provided with a stopper at both ends in the axial direction.

[0015] The tensioning body is provided with a spring groove in communication with the through groove, the spring groove extends to the outer circumferential surface of the tensioning body along the radial direction of the tensioning body, the outer circumferential surface of the tensioning body is provided with a fixed seat at the position of the spring groove, the tensioning piece is provided with a supporting lug, the supporting lug is located on the side close to the central axis of the tensioning body relative to the fixed seat, the supporting lug is provided with a guide column, and the tensioning return spring is sleeved on the guide column and arranged between the fixed seat and the supporting lug.

[0016] The cam member and the tensioning body are provided with a cam return spring extending along the axial direction.

[0017] The front end of the tensioning body is provided with a front cover, the cam return spring is arranged between the front cover and the cam member, and the cam member and the front cover are respectively provided with a first mounting groove and a second mounting groove matched with the cam return spring.

[0018] The rear end of the tensioning body is provided with an extension portion, the extension portion is provided with a shaft sleeve, and the rear end of the cam member is provided with a driving rod matched with the shaft sleeve.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. The setting of the guide piece plays a guiding role for the placement of the adhesive tape, so that the adhesive tape is more accurately fastened on the tensioning piece; and when the tensioning piece is in the reset state, the tensioning piece is lower than the guide piece, thereby facilitating the installation of the adhesive tape; the tensioning piece protrudes outward higher than the guide piece along the radial direction of the tensioning body, so as to tension and fix the adhesive tape outside the space formed by the plurality of tensioning pieces, which can be compatible with the tensioning and fixing of multiple adhesive tapes, is convenient to install and replace, and can always maintain stable tension.

[0021] 2. The limiting part of the tensioning piece is provided with a stop block at both ends in the axial direction, which plays a limiting role for the adhesive tape, so as to avoid the adhesive tape from falling off under the condition of high-speed operation of the motor and large centrifugal force.

[0022] 3. The cam member and the tensioning body are provided with a cam reset spring extending in the axial direction, which facilitates the automatic reset of the cam member, so as to tension and fix the adhesive tape outside the space formed by the plurality of tensioning pieces, thereby adapting to the tensioning and fixing of adhesive tapes of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0023] ATTACHED Figure 1 is a structural schematic view of the utility model.

[0024] ATTACHED Figure 2 is a sectional structure schematic view of the utility model.

[0025] ATTACHED Figure 3 is a structural schematic view of the tensioning body of the utility model.

[0026] ATTACHED Figure 4 is a structural schematic view of the tensioning piece and the cam member of the utility model.

[0027] REFERENCE NUMERALS IN THE DRAWINGS: 1, tensioning body; 11, accommodating cavity; 12, through slot; 13, spring groove; 14, fixed seat; 15, extension part; 16, shaft sleeve; 2, tensioning piece; 21, first inclined surface; 22, limiting part; 23, stop block; 24, supporting lug; 25, guide column; 3, guide piece; 31, connecting part; 32, bending part; 33, supporting part; 4, cam member; 41, second inclined surface; 42, driving rod; 43, first mounting groove; 5, tensioning reset spring; 6, cam reset spring; 7, front cover; 71, second mounting groove. DETAILED DESCRIPTION

[0028] In order to make the technical scheme of the utility model, the technical scheme and the advantages of the utility model more clear, the technical scheme of the utility model embodiment will be clearly and completely described below by combining the drawings of the utility model specific embodiment. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of the utility model.

[0029] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the usual meaning understood by those skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model patent utility model specification and claims do not represent any order, quantity or importance, but are used to distinguish different components. "Including" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, and do not exclude other elements or objects. "Connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect.

[0030] As shown in Figure 1 , Figure 2 The utility model provides a tensioning mechanism, including tensioning body 1, a plurality of tensioning piece 2, a plurality of guide piece 3, cam piece 4.

[0031] The tensioning body 1 has a hollow accommodating cavity 11, and a plurality of through grooves 12 in communication with the accommodating cavity 11 are arranged at the circumference of the tensioning body 1 and extend to the outer circumferential surface of the tensioning body 1 in the radial direction of the tensioning body 1. The number of the tensioning pieces 2 is consistent with the number of the through grooves 12, the tensioning pieces 2 are arranged in the through grooves 12 of the tensioning body 1 in the radial direction and slide in the through grooves 12, and the inner end surface of the tensioning piece 2 is provided with a first inclined surface 21 which is inclined at an angle with respect to the axial direction of the tensioning body 1. A tensioning return spring 5 which can extend and contract in the radial direction is arranged between the tensioning piece 2 and the tensioning body 1. A plurality of guide pieces 3 are arranged at the outer circumference of the tensioning body 1. The cam member 4 is movably arranged in the accommodating cavity 11 of the tensioning body 1 in the axial direction of the tensioning body 1, and the outer circumferential surface of the cam member 4 is provided with a second inclined surface 41 which is adapted to the first inclined surface 21, that is, the inclination of the second inclined surface 41 is consistent with the inclination of the first inclined surface 21. When the cam member 4 moves in the axial direction of the tensioning body 1, the tensioning piece 2 moves in the radial direction of the tensioning body 1. When the tensioning piece 2 moves to the outermost position in the radial direction of the tensioning body 1, the height of the tensioning piece 2 is higher than the height of the guide piece 3. When the tensioning piece 2 moves to the innermost position in the radial direction of the tensioning body 1, the height of the tensioning piece 2 is lower than the height of the guide piece 3.

[0032] In this embodiment, since the second inclined surface 41 of the cam member 4 and the first inclined surface 21 of the tensioning piece 2 abut each other, when the cam member 4 moves in the axial direction of the tensioning body 1, the tensioning piece 2 moves in the radial direction, thereby achieving effective tensioning and relaxation adjustment. Specifically, as shown in Figure 2 the first inclined surface 21 of the tensioning piece 2 and the second inclined surface 41 of the cam member 4 are both outwardly inclined in the inward pushing direction of the cam member 4. When the cam member 4 is inwardly pushed by an external force, the tensioning piece 2 moves to the reset state (moves to the innermost position in the radial direction of the tensioning body 1) under the action of the tensioning return spring 5, at this time, the guide piece 3 is higher than the tensioning piece 2, thereby facilitating the installation of the adhesive tape. After the adhesive tape is placed, the cam member 4 moves reversely, the tensioning piece 2 extends outwardly in the radial direction of the tensioning body 1, and the tensioning piece 2 is higher than the guide piece 3, thereby tensioning and fixing the adhesive tape outside the space formed by the plurality of tensioning pieces 2. The tensioning mechanism of the present application can be compatible with the tensioning and fixing of a plurality of adhesive tapes, and is convenient to install and replace, and can always maintain stable tension.

[0033] Further, the number of the guide pieces 3 is consistent with the number of the tensioning pieces 2, and the guide pieces 3 are located on one side of the tensioning pieces 2, thereby facilitating the installation of the adhesive tape.

[0034] Further, the outer circumferential surface of the tensioning body 1 is octagonal, the tensioning pieces 2 and the guide pieces 3 are both provided in four, and the tensioning pieces 2 and the guide pieces 3 are both arranged on the outer circumferential surface of the tensioning body 1 at intervals, so that the stability and reliability of the tensioning mechanism of the guide pieces 3 and the tensioning pieces 2 are improved, and the tensioning mechanism is ensured to be uniformly stressed when working.

[0035] Further, the guide piece 3 comprises a connecting portion 31, a bending portion 32 and a supporting portion 33 which are sequentially connected, the bending portion 32 and the connecting portion 31 form an angle of 120°, the supporting portion 33 is perpendicular to the bending portion 32, the connecting portion 31 is arranged on the surface of the tensioning body 1 adjacent to the tensioning piece 2, and the supporting portion 33 is parallel to the tensioning piece 2. The guide piece 3 is ensured to play a good guiding and supporting role before the tensioning piece 2 works.

[0036] Further, the outer ends of the tensioning pieces 2 and the guide pieces 3 are both provided with limiting portions 22 extending along the axial direction of the tensioning body 1, the limiting portions 22 of the tensioning pieces 2 are provided with stoppers 23 at both ends in the axial direction, and the stoppers 23 play a limiting role on the adhesive tape, so as to avoid the adhesive tape from being easily caused to fall off under the condition that the motor is high-speed running and the centrifugal force is large.

[0037] Further, the tensioning body 1 is provided with a spring groove 13 which is communicated with the through groove 12 and extends along the radial direction of the tensioning body 1 to the outer circumferential surface of the tensioning body 1, the outer circumferential surface of the tensioning body 1 is provided with a fixing seat 14 at the position of the spring groove 13, the tensioning piece 2 is provided with a supporting lug 24, the supporting lug 24 is located on the side close to the central axis of the tensioning body 1 relative to the fixing seat 14, the supporting lug 24 is provided with a guide column 25, the tensioning return spring 5 is sleeved on the guide column 25 and arranged between the fixing seat 14 and the supporting lug 24. The stability of the action of the tensioning return spring 5 is ensured, so as to ensure the stability of the movement of the tensioning piece 2.

[0038] Further, the cam member 4 and the tensioning body 1 are provided with a cam return spring 6 which is telescopic along the axial direction, so as to facilitate the automatic return of the cam member 4. After the inner pushing force and the outer force of the cam member 4 are recovered, the cam return spring 6 is opened, the cam member 4 is recovered (because the elastic force of the cam return spring 6 is greater than that of the tensioning return spring 5), the tensioning piece 2 extends outward along the radial direction of the tensioning body 1, the tensioning piece 2 extends higher than the guide piece 3, so that the adhesive tape is tightly fixed outside the space formed by the plurality of tensioning pieces 2, and the adhesive tape of different sizes can be tightly fixed.

[0039] Further, the front end of the tensioning body 1 is provided with a front cover 7, the cam return spring 6 is arranged between the front cover 7 and the cam member 4, the cam member 4 and the front cover 7 are respectively provided with a first mounting groove 43 and a second mounting groove 71 which are adapted to the cam return spring 6, so as to ensure the installation stability of the cam return spring 6.

[0040] Further, the rear end of the tensioning body 1 is provided with an extension 15, a shaft sleeve 16 is arranged in the extension 15, the rear end of the cam member 4 is provided with a driving rod 42 adapted to the shaft sleeve 16, and the stability of the movement of the cam member 4 is ensured. The driving rod 42 of the cam member 4 can also be connected to a power mechanism, such as a cylinder, a push rod motor or the like, to drive the cam member 4 to move.

[0041] Those skilled in the art should understand that the above specific embodiments are only examples and not limitations, and various modifications, combinations, partial combinations and replacements can be made to the embodiments of the utility model according to design requirements and other factors, as long as they are within the scope of the appended claims or equivalents, which belong to the protection scope of the utility model.

Claims

1. A tensioning mechanism, characterized in that The tensioning body has a hollow accommodating cavity, a plurality of through grooves in communication with the accommodating cavity are arranged along the circumference of the tensioning body, and the through grooves extend to the outer circumferential surface of the tensioning body along the radial direction of the tensioning body. A plurality of tensioning pieces are arranged in the through grooves of the tensioning body in a sliding manner along the radial direction, the inner end surface of the tensioning piece is provided with a first inclined surface, the first inclined surface is inclined to the axial direction of the tensioning body, and a tensioning reset spring that can stretch and contract along the radial direction is arranged between the tensioning piece and the tensioning body. A plurality of guide pieces are arranged on the outer circumferential surface of the tensioning body. A cam piece is arranged in the accommodating cavity of the tensioning body in a movable manner along the axial direction of the tensioning body, and the outer circumferential surface of the cam piece is provided with a second inclined surface matched with the first inclined surface. When the cam piece moves along the axial direction of the tensioning body, the tensioning piece moves along the radial direction of the tensioning body; when the tensioning piece moves to the outermost position along the radial direction of the tensioning body, the extension height of the tensioning piece is higher than the height of the guide piece; and when the tensioning piece moves to the innermost position along the radial direction of the tensioning body, the extension height of the tensioning piece is lower than the height of the guide piece. The number of the guide pieces is consistent with the number of the tensioning pieces, and the guide pieces are located on one side of the tensioning pieces.

2. The tensioning mechanism of claim 1, wherein, The outer circumferential surface of the tensioning body is in an octagonal structure, and the number of the tensioning pieces and the guide pieces is four, and the tensioning pieces and the guide pieces are arranged on the outer circumferential surface of the tensioning body in a spaced manner.

3. A tensioning mechanism according to claim 2, characterised in that, The guide piece comprises a connecting portion, a bending portion and a supporting portion connected in sequence, the bending portion and the connecting portion are at an angle of 120°, the supporting portion is perpendicular to the bending portion, the connecting portion is arranged on the surface of the tensioning body adjacent to the tensioning piece, and the supporting portion is parallel to the tensioning piece.

4. A tensioning mechanism according to claim 3, characterised in that, The outer end of the tensioning piece and the outer end of the guide piece are provided with a limiting portion extending along the axial direction of the tensioning body, and the limiting portion of the tensioning piece is provided with a stop block at both ends in the axial direction.

5. The tensioning mechanism of claim 1, wherein, The tensioning body is provided with a spring groove in communication with the through groove, the spring groove extends to the outer circumferential surface of the tensioning body along the radial direction of the tensioning body, a fixed seat is arranged at the position of the spring groove on the outer circumferential surface of the tensioning body, a supporting lug is arranged on the tensioning piece, the supporting lug is located on the side close to the central axis of the tensioning body relative to the fixed seat, a guide column is arranged on the supporting lug, the tensioning reset spring is sleeved on the guide column and arranged between the fixed seat and the supporting lug.

6. The tensioning mechanism of claim 1, wherein, A cam reset spring that can stretch and contract along the axial direction is arranged between the cam piece and the tensioning body.

7. The tensioning mechanism of claim 1, wherein, The front end of the tensioning body is provided with a front cover, the cam reset spring is arranged between the front cover and the cam piece, and the cam piece and the front cover are respectively provided with a first mounting groove and a second mounting groove matched with the cam reset spring.

8. A tensioning mechanism according to claim 7, characterised in that, The rear end of the tensioning body is provided with an extension portion, a shaft sleeve is arranged in the extension portion, and the rear end of the cam piece is provided with a driving rod matched with the shaft sleeve.

9. The tensioning mechanism of claim 1, wherein, ​

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