Connecting rod type tensioning roller

Abstract

The connecting rod type tensioning roller comprises a main shaft, one end of the main shaft is in threaded connection with an adjusting nut, a plurality of evenly-distributed limiting supports are fixedly assembled on the outer side of the adjusting nut, the ends, away from the adjusting nut, of the multiple limiting supports are each provided with an expansion plate in a hinged mode, and the outer side of the main shaft is slidably sleeved with a sliding guide pipe; the end, away from the adjusting nut, of the sliding guide pipe is fixedly connected with an air cylinder body, multiple evenly-distributed swing connecting rods are hinged between the air cylinder body and the multiple expansion plates, and the side, away from the swing connecting rods, of the air cylinder body is fixedly connected with an air cylinder front cover which is matched with the air cylinder body to form a driving cavity. One end of the spindle away from the adjusting nut is in threaded connection with a positioning nut. According to the connecting rod type tensioning roller disclosed by the invention, the tensioning state is regulated and controlled by adopting a connecting rod moving mode, so that the tensioning roller can tension and support large-diameter and heavy-load products, and meanwhile, the tensioning and supporting diameter range of the tensioning roller is widened.

Description

Technical Field

[0001] The invention belongs to the technical field of tension rollers, and in particular relates to a connecting rod type tension roller. Background Art

[0002] The tensioning roller is a device that can change its own diameter to tighten and support the reel-like components. It is mostly used in the field of winding equipment. Among them, the air shaft is the more common tensioning roller. The air shaft is mainly composed of a shaft, multiple expansion blocks and an expansion core tube. The expansion blocks are ejected under the action of air pressure by conveying compressed air into the shaft, thereby achieving tension support for winding reels with different inner diameters.

[0003] However, with the continuous expansion of production scale, the inner diameter of the product winding drum and the roll diameter are constantly increasing. Due to the compressibility of gas, the expansion block in the air shaft will retract under heavy load. At this time, the expansion block and the expansion core tube will slide relative to each other, which makes the tensioning support function of the expansion block invalid. In addition, the extension stroke of the expansion block in the air shaft is small. As a result, the air shaft has the following problems in actual application: large diameter and heavy load products cannot be stably tensioned and supported, and the tensioning diameter range is small.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a connecting rod type tensioning roller.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a connecting rod type tensioning roller, which can improve the stability and application range of tensioning support for large diameter and heavy load products.

[0007] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a connecting rod type tensioning roller, including a main shaft, one end of the main shaft is threadedly connected with an adjusting nut, and the outer side of the adjusting nut is fixedly equipped with a plurality of evenly distributed limit brackets, and the ends of the plurality of limit brackets away from the adjusting nut are hingedly equipped with expansion plates, and the outer side of the main shaft is slidingly sleeved with a sliding guide, and the end of the sliding guide away from the adjusting nut is fixedly connected with a cylinder body, and a plurality of evenly distributed swing connecting rods are hinged between the cylinder body and the plurality of expansion plates, and the side of the cylinder body away from the swing connecting rod is fixedly connected with a cylinder front cover, and the cylinder front cover and the cylinder body cooperate to form a driving cavity, an air guide channel is opened in the main shaft, and the air guide channel is connected to the driving cavity, and the end of the main shaft away from the adjusting nut is threadedly connected with a positioning nut, and the positioning nut is arranged on the side of the cylinder front cover away from the cylinder body.

[0008] In one or more embodiments of the present invention, a plurality of friction blocks are fixedly connected to the opposite sides of the plurality of expansion plates. By arranging the friction blocks on the outer surface of the expansion plates, the friction force of the outer surface of the friction blocks is improved, and the stability of the tensioning support of the reel by the friction blocks is ensured. A reset spring is arranged between the adjustment nut and the sliding guide tube, and the reset spring is sleeved on the outer side of the main shaft. The compression and release of the reset spring play a role in moving and resetting the sliding guide tube.

[0009] In one or more embodiments of the present invention, a first limit support is hingedly connected to one end of the plurality of limit brackets close to the expansion plate, and the first limit support is fixedly connected to the inner wall of the expansion plate. The first limit support serves to limit the connection between the limit bracket and the expansion plate.

[0010] In one or more embodiments of the present invention, a pair of fixed connection rings are arranged on one side of the sliding guide tube close to the adjusting nut, and the pair of fixed connection rings are fixedly sleeved on the outer side of the sliding guide tube. The fixed connection rings play a role in assembling and fixing the multiple groups of first connection supports. Multiple groups of first connection supports are fixedly connected to the outer sides of the pair of fixed connection rings. The first connection supports play a role in assembling and limiting the auxiliary support rods.

[0011] In one or more embodiments of the present invention, auxiliary support rods are hinged in multiple groups of the first connection supports. Multiple groups of expansion plates are auxiliary supported by the swinging of multiple groups of auxiliary support rods, so as to facilitate the regulation of the tension and expansion state of multiple groups of expansion plates. The auxiliary support rod is hinged at one end away from the first connection support to a second limit support, and the second limit support is fixedly connected to the inner wall of the expansion plate. The second limit support serves to connect the auxiliary support rod and the first connection support.

[0012] In one or more embodiments of the present invention, a connecting piece is fixedly connected between the sliding conduit and the cylinder body. The connecting piece serves to limit the connection between the sliding conduit and the cylinder body. A sealing ring is fixedly mounted on the inner wall of the connecting piece, and the connecting piece and the sealing ring are both sleeved on the outer side of the main shaft. The sealing ring is provided to ensure the sealing of the connection between the connecting piece and the main shaft.

[0013] In one or more embodiments of the present invention, multiple groups of evenly distributed second connection supports are hinged between the multiple swing links and the cylinder body. The swing links and the cylinder body are connected and limited by the multiple groups of second connection supports. The ends of the multiple swing links away from the second connection supports are hinged to third limit supports, and the third limit supports are fixedly connected to the inner wall of the expansion plate. The swing links and the expansion plate are connected and limited by the third limit supports.

[0014] In one or more embodiments of the present invention, an inner stopper is fixedly connected to one end of the cylinder front cover located in the driving cavity, and the inner stopper is slidably assembled on the outer side of the main shaft. The sliding stroke of the cylinder body is adjusted by arranging inner stops of different sizes.

[0015] In one or more embodiments of the present invention, a limiting seal ring is arranged between the inner stopper and the cylinder body, and the limiting seal ring is sleeved on the outer side of the inner stopper. The inner stopper is provided to ensure the sealing performance of the connection between the inner stopper and the cylinder body.

[0016] In one or more embodiments of the present invention, a countersunk head assembly blind hole is provided at one end of the main shaft away from the adjusting nut, the countersunk head assembly blind hole is connected to the air guide passage, and an inflation valve is fixedly installed in the countersunk head assembly blind hole. The air guide passage is blocked and limited by the inflation valve, and at the same time, the air intake and exhaust state of the air guide passage can be controlled.

[0017] Compared with the prior art, the connecting rod type tensioning roller disclosed in the present invention adjusts the tensioning state by moving the connecting rod, so that the tensioning roller can tension and support large-diameter and heavy-load products, and at the same time, the tensioning support diameter range of the tensioning roller is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a front cross-sectional view of a connecting rod type tensioning roller in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0021] Figure 3 It is a partial structural schematic diagram of a connecting rod type tensioning roller in one embodiment of the present invention;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure at B in the middle;

[0023] Figure 5 for Figure 3 Schematic diagram of the structure at C in the middle;

[0024] Figure 6 A partial structural perspective view of a connecting rod type tensioning roller in one embodiment of the present invention;

[0025] Figure 7 It is a three-dimensional diagram of a connecting rod type tensioning roller in one embodiment of the present invention.

[0026] Description of main reference numerals:

[0027] 1-main shaft, 2-adjusting nut, 3-limiting bracket, 4-expansion plate, 5-sliding guide tube, 6-cylinder body, 7-swing connecting rod, 8-cylinder front cover, 9-air guide channel, 10-positioning nut, 11-friction block, 12-reset spring, 13-first limiting support, 14-fixed connecting ring, 15-first connecting support, 16-auxiliary support rod, 17-second limiting support, 18-connecting piece, 19-sealing ring, 20-second connecting support, 21-third limiting support, 22-inner stopper, 23-limiting sealing ring, 24-inflating valve. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, a connecting rod type tensioning roller in one embodiment of the present invention includes a main shaft 1.

[0030] like Figure 1 As shown, one end of the main shaft 1 is threadedly connected with an adjusting nut 2. The limiting bracket 3 is supported, fixed and moved by the adjusting nut 2. At the same time, the winding diameter range of the multiple expansion plates 4 can be adjusted by moving the adjusting nut 2.

[0031] like Figure 1 As shown, a plurality of evenly distributed limiting brackets 3 are fixedly mounted on the outer side of the adjusting nut 2. The plurality of expansion plates 4 are supported and limited by the plurality of limiting brackets 3.

[0032] Specifically, the position limiting bracket 3 of different lengths can be selected according to the actual situation of the inner diameter of the winding drum.

[0033] like Figure 6 As shown, the ends of the plurality of limit brackets 3 facing away from the adjusting nut 2 are hingedly assembled with expansion plates 4, and the tensioning state is controlled by controlling the expansion and contraction states of the plurality of expansion plates 4.

[0034] like Figure 6As shown, the first limit support 13 is hinged at one end of the plurality of limit brackets 3 close to the expansion plate 4, and the first limit support 13 is fixedly connected to the inner wall of the expansion plate 4. The first limit support 13 serves to connect and limit the limit bracket 3 and the expansion plate 4.

[0035] like Figures 3 to 6 As shown, multiple friction blocks 11 are fixedly connected to the opposite sides of the multiple expansion plates 4. By arranging the friction blocks 11 on the outer surface of the expansion plates 4, the friction force of the outer surface of the friction blocks 11 is increased, ensuring the stability of the friction blocks 11 in tensioning and supporting the winding drum.

[0036] like Figures 1 to 4 As shown, the outer sliding sleeve of the main shaft 1 is provided with a sliding guide 5. The cylinder body 6 and the fixed connecting ring 14 are assembled, fixed and moved by the sliding guide 5, so that the fixed connecting ring 14 can be moved by slidingly driving the sliding guide 5, so that the auxiliary support rod 16 can be swung and controlled.

[0037] like Figures 1 to 4 As shown, a pair of fixed connection rings 14 are arranged on one side of the sliding guide tube 5 close to the adjusting nut 2, and the pair of fixed connection rings 14 are fixedly sleeved on the outer side of the sliding guide tube 5. The fixed connection rings 14 play a role in assembling and fixing multiple groups of first connection supports 15. Multiple groups of first connection supports 15 are fixedly connected to the outer sides of the pair of fixed connection rings 14. The first connection supports 15 play a role in assembling and limiting the auxiliary support rods 16.

[0038] like Figure 3 to Figure 4 As shown, auxiliary support rods 16 are hinged in multiple groups of first connection supports 15. Multiple groups of expansion plates 4 are auxiliary supported by the swing of multiple groups of auxiliary support rods 16, so as to facilitate the regulation of the tension and expansion state of multiple groups of expansion plates 4. The auxiliary support rod 16 is hinged at one end away from the first connection support 15 with a second limit support 17, and the second limit support 17 is fixedly connected to the inner wall of the expansion plate 4. The second limit support 17 serves to connect the auxiliary support rod 16 with the first connection support 15.

[0039] like Figure 3 to Figure 4 As shown, a return spring 12 is arranged between the adjustment nut 2 and the sliding guide tube 5, and the return spring 12 is sleeved on the outer side of the main shaft 1. The compression and release of the return spring 12 play a role in moving and resetting the sliding guide tube 5.

[0040] like Figure 1 to Figure 2 As shown, one end of the sliding guide tube 5 away from the adjusting nut 2 is fixedly connected to the cylinder body 6. The cylinder body 6, the swing connecting rod 7 and the main shaft 1 cooperate to form a driving cavity, so that the cylinder body 6 can be driven and controlled by conveying compressed air into the driving cavity.

[0041] like Figures 3 to 5 As shown, a connecting piece 18 is fixedly connected between the sliding guide tube 5 and the cylinder body 6. The connecting piece 18 serves to limit the connection between the sliding guide tube 5 and the cylinder body 6.

[0042] like Figures 3 to 5 As shown, a sealing ring 19 is fixedly mounted on the inner wall of the connecting member 18, and the connecting member 18 and the sealing ring 19 are both sleeved on the outer side of the main shaft 1. The sealing ring 19 is provided to ensure the sealing performance of the connection between the connecting member 18 and the main shaft 1.

[0043] like Figures 3 to 5 As shown, a plurality of evenly distributed swing links 7 are hinged between the cylinder body 6 and the plurality of expansion plates 4. The expansion plates 4 and the cylinder body 6 are connected via the plurality of swing links 7.

[0044] like Figure 1 to Figure 2 As shown, multiple groups of evenly distributed second connection supports 20 are hinged between the multiple swing links 7 and the cylinder body 6. The swing links 7 and the cylinder body 6 are connected and limited by the multiple groups of second connection supports 20.

[0045] like Figure 6 As shown, the ends of the plurality of swing links 7 away from the second connection support 20 are hingedly connected to the third limit support 21, and the third limit support 21 is fixedly connected to the inner wall of the expansion plate 4. The swing link 7 and the expansion plate 4 are connected and limited by the third limit support 21.

[0046] like Figure 1 to Figure 2 As shown, a cylinder front cover 8 is fixedly connected to the side of the cylinder body 6 away from the swing link 7, and the cylinder front cover 8 cooperates with the cylinder body 6 to form a driving cavity. It is convenient to drive the cylinder body 6 by delivering compressed air into the driving cavity, so as to facilitate driving and controlling the sliding guide tube 5.

[0047] like Figure 1 to Figure 2 As shown, one end of the cylinder front cover 8 located in the driving cavity is fixedly connected with an inner stopper 22, and the inner stopper 22 is slidably assembled on the outer side of the main shaft 1. The sliding stroke of the cylinder body 6 is adjusted by arranging inner stoppers 22 of different sizes.

[0048] like Figure 1 to Figure 2 As shown, a limiting seal ring 23 is arranged between the inner stopper 22 and the cylinder body 6, and the limiting seal ring 23 is sleeved on the outer side of the inner stopper 22. The inner stopper 22 is provided to ensure the connection sealing performance between the inner stopper 22 and the cylinder body 6.

[0049] like Figure 1 to Figure 2 As shown, a flow channel 9 is provided in the main shaft 1, and the flow channel 9 is connected with the driving cavity, so that compressed air can be delivered to the driving cavity through the flow channel 9, thereby facilitating the movement and driving of the cylinder body 6.

[0050] Specifically, an inclined air inlet is provided on one side of the air guide channel 9 close to the driving cavity, and compressed air is continuously delivered into the driving cavity through the inclined air inlet so that the cylinder body 6 can drive the sliding guide tube 5 to slide on the outside of the main shaft 1 under the action of air pressure.

[0051] like Figure 1 to Figure 2 As shown, the end of the main shaft 1 away from the adjusting nut 2 is threadedly connected with a positioning nut 10, and the positioning nut 10 is arranged on the side of the cylinder front cover 8 away from the cylinder body 6. The cylinder front cover 8 is limited in movement by threading the positioning nut 10 with the main shaft 1, thereby reducing the risk of slippage of the cylinder body 6 during use.

[0052] Specifically, a countersunk assembly blind hole is provided at one end of the main shaft 1 away from the adjusting nut 2 , and the countersunk assembly blind hole is communicated with the air guide channel 9 .

[0053] like Figure 1 to Figure 2 As shown, a charging valve 24 is fixedly installed in the countersunk assembly blind hole. The air guide channel 9 is blocked and limited by the charging valve 24, and at the same time, the air intake and exhaust state of the air guide channel 9 can be controlled.

[0054] The inflation valve 24 is commercially available and can be directly purchased and used.

[0055] During specific use, when tensioning is required, compressed air is delivered into the air guide channel 9 through the inflation valve 24, and the compressed air is delivered to the driving cavity along the inclined air inlet, so that the cylinder body 6 can drive the sliding guide tube 5 to slide on the outside of the main shaft 1 under the action of air pressure. When the sliding guide tube 5 is sliding, it will drive multiple swing connecting rods 7 and auxiliary support rods 16 to swing, so that multiple expansion plates 4 can drive the friction blocks 11 to move outward under the action of the limit bracket 3, and tensioning and limiting are performed through the expansion of multiple expansion plates 4. After tensioning, the cylinder front cover 8 can be limited by threading the positioning nut 10.

[0056] When retraction is required, the limit bracket 3 must be retracted first, and the air in the driving cavity must be discharged through the inflation valve 24. Subsequently, the sliding guide tube 5 can be reset as the reset spring 12 is released. At the same time, the swing link 7 and the auxiliary support rod 16 will swing synchronously and drive the multiple expansion plates 4 to contract.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Link type tension roller, characterized in that: The invention comprises a main shaft, one end of which is threadedly connected with an adjusting nut, a plurality of evenly distributed limit brackets are fixedly assembled on the outside of the adjusting nut, a plurality of limit brackets are hingedly assembled with expansion plates on one end away from the adjusting nut, a sliding sleeve is slidingly provided on the outside of the main shaft, a sliding guide is fixedly connected with a cylinder body on one end of the sliding guide away from the adjusting nut, a plurality of evenly distributed swing connecting rods are hingedly connected between the cylinder body and the plurality of expansion plates, a cylinder front cover is fixedly connected with a side of the cylinder body away from the swing connecting rod, the cylinder front cover cooperates with the cylinder body to form a driving cavity, an air guide channel is opened in the main shaft, the air guide channel is communicated with the driving cavity, a positioning nut is threadedly connected with an end of the main shaft away from the adjusting nut, and the positioning nut is arranged on a side of the cylinder front cover away from the cylinder body.

2. The connecting rod type tension roller according to claim 1, characterized in that: A plurality of friction blocks are fixedly connected to the opposite sides of the plurality of expansion plates, a return spring is arranged between the adjustment nut and the sliding guide tube, and the return spring is sleeved on the outer side of the main shaft.

3. The connecting rod type tension roller according to claim 1, characterized in that: One end of each of the plurality of limit brackets close to the expansion plate is hinged with a first limit support, and the first limit support is fixedly connected to the inner wall of the expansion plate.

4. The connecting rod type tension roller according to claim 1, characterized in that: A pair of fixed connection rings are arranged on one side of the sliding guide tube close to the adjusting nut. The pair of fixed connection rings are fixedly sleeved on the outer side of the sliding guide tube, and the outer sides of the pair of fixed connection rings are fixedly connected to multiple groups of first connection supports.

5. The connecting rod type tension roller according to claim 4, characterized in that: Auxiliary support rods are hinged in multiple groups of the first connection supports, and one end of the auxiliary support rod away from the first connection support is hinged to a second limit support, and the second limit support is fixedly connected to the inner wall of the expansion plate.

6. The connecting rod type tension roller according to claim 1, characterized in that: A connecting piece is fixedly connected between the sliding guide tube and the cylinder body, a sealing ring is fixedly assembled on the inner wall of the connecting piece, and the connecting piece and the sealing ring are both sleeved on the outer side of the main shaft.

7. The connecting rod type tension roller according to claim 1, characterized in that: Multiple groups of evenly distributed second connecting supports are hinged between the multiple swing links and the cylinder body, and the ends of the multiple swing links away from the second connecting supports are hinged with third limit supports, and the third limit supports are fixedly connected to the inner wall of the expansion plate.

8. The connecting rod type tension roller according to claim 7, characterized in that: One end of the cylinder front cover located in the driving cavity is fixedly connected with an inner stopper, and the inner stopper is slidably assembled on the outer side of the main shaft.

9. The link type tension roller according to claim 8, characterized in that: A limit sealing ring is arranged between the inner stop block and the cylinder body, and the limit sealing ring is sleeved on the outer side of the inner stop block. A countersunk assembly blind hole is opened at the end of the main shaft away from the adjusting nut, and the countersunk assembly blind hole is connected with the air guide channel. An inflation valve is fixedly assembled in the countersunk assembly blind hole.

10. The link type tension roller according to claim 1, characterized in that: An inclined air inlet is provided on one side of the air guide passage close to the driving cavity.

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