Chain tensioning mechanism

Abstract

The utility model discloses a chain tensioning mechanism which comprises a screw rod, a chain tensioning device and a chain tensioning device, the screw rod is provided with a first thread area and a second thread area, and the thread direction of the first thread area is opposite to the thread direction of the second thread area; the first tensioning unit comprises a first adjusting plate, a first tensioning wheel and a plurality of first supporting wheels, the first supporting wheels are rotationally connected with the first adjusting plate, the first tensioning wheel is rotationally connected with the first adjusting plate in a position-adjustable mode, the first chain bypasses the first tensioning wheel and the first supporting wheels, and the first adjusting plate is in threaded connection with the first threaded area; the second tensioning unit comprises a second adjusting plate, a second tensioning wheel and a plurality of second supporting wheels, the second supporting wheels are rotationally connected with the second adjusting plate, the second tensioning wheel is rotationally connected with the second adjusting plate in a position-adjustable mode, the second chain bypasses the second tensioning wheel and the second supporting wheels, and the second adjusting plate is in threaded connection with the second threaded area. The adjustment is convenient.

Description

Technical Field

[0001] The utility model generally relates to the field of blister machines, and particularly relates to a chain tensioning mechanism. Background Art

[0002] A blister machine, also known as a thermoplastic forming machine, is a machine that sucks heated and plasticized thermoplastic plastic coils such as PVC, PE, PP, PET, and HIPS into various shaped packaging boxes, frames and other products. Utilizing the vacuum suction generated by a vacuum pump, heat - softened thermoplastic sheets such as PVC and PET are sucked into various shaped vacuum covers, blister trays, bubble shells, etc. through a mold.

[0003] In the prior art, since a blister machine produces products of various specifications, it is necessary to adjust the height of the upper part of the chain to meet the production requirements of different products. The adjustment of the chain height is generally carried out by pressing the chain with a pressing wheel above the chain. When the pressing wheel presses the chain, the tightness of the chain will change. Generally, the position of the screw is adjusted to adaptively adjust the tightness of the chain, and the adjustment is not convenient enough. Summary of the Utility Model

[0004] In view of the above - mentioned defects or deficiencies in the prior art, it is desired to provide a chain tensioning mechanism that is convenient to adjust.

[0005] In a first aspect, the chain tensioning mechanism of the utility model includes:

[0006] A screw, which is provided with a first thread section and a second thread section, and the thread directions of the first thread section and the second thread section are opposite;

[0007] A first tensioning unit, which includes a first adjusting plate, a first tensioning wheel and a plurality of first supporting wheels. The first supporting wheels are rotatably connected to the first adjusting plate, the first tensioning wheel is rotatably connected to the first adjusting plate with an adjustable position, a first chain respectively bypasses the first tensioning wheel and the first supporting wheels, and the first adjusting plate is screwed to the first thread section;

[0008] A second tensioning unit, which includes a second adjusting plate, a second tensioning wheel and a plurality of second supporting wheels. The second supporting wheels are rotatably connected to the second adjusting plate, the second tensioning wheel is rotatably connected to the second adjusting plate with an adjustable position, a second chain respectively bypasses the second tensioning wheel and the second supporting wheels, and the second adjusting plate is screwed to the second thread section.

[0009] According to the technical solution provided by the embodiment of the present application, by adjusting the position of the first tensioning wheel on the first adjusting plate, the first chain is kept in a tensioned state, and by adjusting the position of the second tensioning wheel on the second adjusting plate, the second chain is kept in a tensioned state, and the adjustment is convenient. Brief Description of the Drawings

[0010] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0011] Figure 1 Schematic structural diagram of the chain tensioning mechanism according to an embodiment of the present utility model;

[0012] Figure 2 Schematic structural diagram of the chain tensioning mechanism according to an embodiment of the present utility model;

[0013] Figure 3 Exploded view of the first tensioning unit of the chain tensioning mechanism according to an embodiment of the present utility model. Detailed implementation manners

[0014] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model and are not intended to limit the utility model. Additionally, it should be noted that for the sake of description, only parts related to the utility model are shown in the drawings.

[0015] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0016] Please refer to Figures 1 to 3 , the chain tensioning mechanism of the present utility model includes: a screw rod 100, which is provided with a first thread area 110 and a second thread area 120, and the thread directions of the first thread area 110 and the second thread area 120 are opposite; a first tensioning unit 200, which includes a first adjusting plate 210, a first tensioning wheel 220, and a plurality of first supporting wheels 230. The first supporting wheels 230 are rotatably connected to the first adjusting plate 210, the first tensioning wheel 220 is rotatably connected to the first adjusting plate 210 with an adjustable position, the first chain respectively bypasses the first tensioning wheel 220 and the first supporting wheels 230, and the first adjusting plate 210 is screwed to the first thread area 110; a second tensioning unit 300, which includes a second adjusting plate 310, a second tensioning wheel 320, and a plurality of second supporting wheels 330. The second supporting wheels 330 are rotatably connected to the second adjusting plate 310, the second tensioning wheel 320 is rotatably connected to the second adjusting plate 310 with an adjustable position, the second chain respectively bypasses the second tensioning wheel 320 and the second supporting wheels 330, and the second adjusting plate 310 is screwed to the second thread area 120.

[0017] In an embodiment of the present utility model, the screw rod 100 is provided with a first thread area 110 and a second thread area 120. The thread directions of the first thread area 110 and the second thread area 120 are opposite. The first adjusting plate 210 is screwed to the first thread area 110, and the second adjusting plate 310 is screwed to the second thread area 120. By rotating the screw rod 100, the first adjusting plate 210 and the second adjusting plate 310 can approach or move away from each other synchronously, thereby adjusting the distance between the first adjusting plate 210 and the second adjusting plate 310, that is, adjusting the distance between the first tensioning unit 200 and the second tensioning unit 300, that is, adjusting the distance between the first chain on the first tensioning unit 200 and the second chain on the second tensioning unit 300, so that the plastic suction machine can meet the processing requirements of different products.

[0018] The first tensioning unit 200 includes a first adjusting plate 210, a first tensioning wheel 220 and a plurality of first supporting wheels 230. The first tensioning wheel 220 and the first supporting wheels 230 can jointly support the first chain. Of course, one side of the first chain is located in the first tensioning unit 200, and a structure similar to the first tensioning unit 200 can be provided on the other side of the first chain. By adjusting the position of the first tensioning wheel 220 on the first adjusting plate 210, the first chain can be kept in a tensioned state, which is convenient for adjustment.

[0019] The second tensioning unit 300 includes a second adjusting plate 310, a second tensioning wheel 320 and a plurality of second supporting wheels 330. The second tensioning wheel 320 and the second supporting wheels 330 can jointly support the second chain. Of course, one side of the second chain is located in the second tensioning unit 300, and a structure similar to the second tensioning unit 300 can be provided on the other side of the second chain. By adjusting the position of the second tensioning wheel 320 on the second adjusting plate 310, the second chain can be kept in a tensioned state, which is convenient for adjustment.

[0020] Further, the first adjusting plate 210 is provided with a first waist-shaped hole 211. The first tensioning wheel 220 is rotatably connected to a first adjusting seat 240. The first adjusting seat 240 includes a first stop portion 241, a first sliding portion 242 and a first screwing portion 244. The first sliding portion 242 is placed in the first waist-shaped hole 211. The first screwing portion 244 is screwed with a first fixing nut 245. The first fixing nut 245 and the first stop portion 241 are located on both sides of the first adjusting plate 210. The first fixing nut 245 and the first stop portion 241 jointly clamp the first adjusting plate 210.

[0021] In an embodiment of the present utility model, the first adjusting plate 210 is provided with a first oblong hole 211, and the first sliding portion 242 is placed into the first oblong hole 211. The first sliding portion 242 can slide within the first oblong hole 211, thereby adjusting the relative position between the first adjusting seat 240 and the first adjusting plate 210, that is, adjusting the relative position between the first tensioning wheel 220 and the first adjusting plate 210, so that the first chain remains in a tensioned state. The first screwing portion 244 is screwed with a first fixing nut 245. The first fixing nut 245 and the first stopping portion 241 are located on both sides of the first adjusting plate 210. When adjusting the position of the first adjusting seat 240, rotate the first fixing nut 245 so that the first fixing nut 245 and the first stopping portion 241 loosen the first adjusting plate 210, and the first adjusting seat 240 can move relative to the first adjusting plate 210. At the same time, due to the limitation of the first fixing nut 245 and the first stopping portion 241, the first adjusting seat 240 cannot be separated from the first adjusting plate 210. After the position adjustment of the first adjusting seat 240 is completed, rotate the first fixing nut 245 so that the first fixing nut 245 and the first stopping portion 241 clamp the first adjusting plate 210, thereby fixing the first adjusting seat 240 and the first adjusting plate 210.

[0022] Further, it further includes a first bolt 250. The first bolt 250 passes through one side of the first adjusting plate 210 and enters the first oblong hole 211 and is screwed with the first sliding portion 242. The length direction of the first bolt 250 is consistent with the length direction of the first oblong hole 211. The bolt is screwed with a first adjusting nut 251. The first adjusting nut 251 is located on the side of the first sliding portion 242 opposite to the screw rod 100, and the first adjusting nut 251 abuts against the outer side of the first adjusting plate 210.

[0023] In an embodiment of the present utility model, under the action of the pulling force of the first chain on the first tensioning wheel 220, the first adjusting nut 251 will closely adhere to the outer side of the first adjusting plate 210. When adjusting the position of the first adjusting seat 240, by rotating the first adjusting nut 251, the screwing position of the first adjusting nut 251 on the first bolt 250 is changed to drive the first adjusting seat 240 to move relative to the first adjusting plate 210, thereby adjusting the position of the first tensioning wheel 220 and tensioning the first chain, facilitating the adjustment of the position of the first tensioning wheel 220 and reducing the adjustment difficulty.

[0024] Further, the first sliding portion 242 is provided with a first screw hole 243, and the first bolt 250 is screwed with the first screw hole 243. The first screw hole 243 penetrates through the first sliding portion 242.

[0025] In an embodiment of the present utility model, a first screw hole 243 is provided on the first sliding portion 242, and the first bolt 250 is screwed with the first screw hole 243, facilitating the connection between the first bolt 250 and the first sliding portion 242. The first screw hole 243 penetrates through the first sliding portion 242, facilitating the machining of the first screw hole 243.

[0026] Further, a first gasket 246 is sleeved on the first screwing portion 244, and the first gasket 246 is located between the first screwing portion 244 and the first fixing nut 245.

[0027] In an embodiment of the present utility model, the first gasket 246 can increase the fastening force of the first fixing nut 245, ensuring the reliability of the first fixing nut 245 and the first stop portion 241 for clamping and fixing the first adjusting plate 210.

[0028] Further, a second waist-shaped hole 311 is provided on the second adjusting plate 310. The second tensioning wheel 320 is rotatably connected to the second adjusting seat. The second adjusting seat includes a second stop portion, a second sliding portion, and a second screwing portion. The second sliding portion is placed into the second waist-shaped hole 311. A second fixing nut is screwed on the second screwing portion. The second fixing nut and the second stop portion are located on both sides of the second adjusting plate 310, and the second fixing nut and the second stop portion jointly clamp the second adjusting plate 310.

[0029] In an embodiment of the present utility model, a second waist-shaped hole 311 is provided on the second adjusting plate 310. The second sliding portion is placed into the second waist-shaped hole 311, and the second sliding portion can slide within the second waist-shaped hole 311, thereby adjusting the relative position between the second adjusting seat and the second adjusting plate 310, that is, adjusting the relative position between the second tensioning wheel 320 and the second adjusting plate 310, so that the second chain is kept in a tensioned state. A second fixing nut is screwed on the second screwing portion. The second fixing nut and the second stop portion are located on both sides of the second adjusting plate 310. When adjusting the position of the second adjusting seat, rotate the second fixing nut to loosen the second adjusting plate 310 by the second fixing nut and the second stop portion. The second adjusting seat can move relative to the second adjusting plate 310. At the same time, due to the limitation of the second fixing nut and the second stop portion, the second adjusting seat cannot be separated from the second adjusting plate 310. After the position adjustment of the second adjusting seat is completed, rotate the second fixing nut to clamp the second adjusting plate 310 by the second fixing nut and the second stop portion, thereby fixing the second adjusting seat and the second adjusting plate 310.

[0030] Furthermore, it also includes a second bolt 340, which passes through one side of the second adjustment plate 310, enters the second waist hole 311 and is screwed with the second sliding part. The length direction of the second bolt 340 is consistent with the length direction of the second waist hole 311. The bolt is screwed with a second adjustment nut 341, and the second adjustment nut 341 is located on the side of the second sliding part away from the screw rod 100, and the second adjustment nut 341 is against the outer side of the second adjustment plate 310.

[0031] In the embodiment of the utility model, under the action of the pulling force of the second chain on the second tensioning wheel 320, the second adjusting nut 341 will be close to the outer side of the second adjusting plate 310. When adjusting the position of the second adjusting seat, by rotating the second adjusting nut 341, the threaded position of the second adjusting nut 341 on the second bolt 340 is changed to drive the second adjusting seat to move relative to the second adjusting plate 310, thereby adjusting the position of the second tensioning wheel 320 and tightening the second chain, which makes it easier to adjust the position of the second tensioning wheel 320 and reduces the difficulty of adjustment.

[0032] Furthermore, the second sliding portion is provided with a second screw hole, the second bolt 340 is screwed into the second screw hole, and the second screw hole passes through the second sliding portion.

[0033] In the embodiment of the utility model, the second sliding part is provided with a second screw hole, and the second bolt 340 is screwed with the second screw hole, so as to facilitate the connection between the second bolt 340 and the second sliding part. The second screw hole passes through the second sliding part, so as to facilitate the processing of the second screw hole.

[0034] Furthermore, the second threaded portion is sleeved with a second gasket, and the second gasket is located between the second threaded portion and the second fixing nut.

[0035] In the embodiment of the present utility model, the second gasket can increase the fastening force of the second fixing nut, thereby ensuring the reliability of the second fixing nut and the second stopper clamping and fixing the second adjustment plate 310 .

[0036] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A chain tensioning mechanism, characterized in that, include: A screw rod is provided with a first thread zone and a second thread zone, wherein the thread direction of the first thread zone is opposite to the thread direction of the second thread zone; A first tensioning unit, comprising a first adjusting plate, a first tensioning wheel and a plurality of first supporting wheels, wherein the first supporting wheel is rotatably connected to the first adjusting plate, the first tensioning wheel is rotatably connected to the first adjusting plate in an adjustable position, the first chain passes around the first tensioning wheel and the first supporting wheel respectively, and the first adjusting plate is threadedly connected to the first threaded area; The second tensioning unit includes a second adjustment plate, a second tensioning wheel and a plurality of second support wheels, wherein the second support wheel is rotatably connected to the second adjustment plate, the second tensioning wheel is rotatably connected to the second adjustment plate in an adjustable position, the second chain passes around the second tensioning wheel and the second support wheel respectively, and the second adjustment plate is threadedly connected to the second threaded area.

2. The chain tensioning mechanism according to claim 1, wherein The first adjustment plate is provided with a first waist hole, the first tensioning wheel is rotatably connected to the first adjustment seat, the first adjustment seat includes a first stop portion, a first sliding portion and a first threaded portion, the first sliding portion is inserted into the first waist hole, the first threaded portion is threaded with a first fixing nut, the first fixing nut and the first stop portion are located on both sides of the first adjustment plate, and the first fixing nut and the first stop portion jointly clamp the first adjustment plate.

3. The chain tensioning mechanism according to claim 2, characterized in that, It also includes a first bolt, which passes through one side of the first adjustment plate, enters the first waist hole and is screwed with the first sliding part. The length direction of the first bolt is consistent with the length direction of the first waist hole. The bolt is screwed with a first adjusting nut, which is located on the side of the first sliding part facing away from the screw rod, and the first adjusting nut is against the outer side of the first adjustment plate.

4. The chain tensioning mechanism according to claim 3, characterized in that, The first sliding portion is provided with a first screw hole, the first bolt is screwed into the first screw hole, and the first screw hole passes through the first sliding portion.

5. The chain tensioning mechanism according to claim 2, wherein The first threaded portion is sleeved with a first gasket, and the first gasket is located between the first threaded portion and the first fixing nut.

6. The chain tensioning mechanism according to claim 1, characterized in that, The second adjustment plate is provided with a second waist hole, the second tensioning wheel is rotatably connected to the second adjustment seat, the second adjustment seat includes a second stop portion, a second sliding portion and a second threaded portion, the second sliding portion is inserted into the second waist hole, the second threaded portion is threaded with a second fixing nut, the second fixing nut and the second stop portion are located on both sides of the second adjustment plate, and the second fixing nut and the second stop portion jointly clamp the second adjustment plate.

7. The chain tensioning mechanism according to claim 6, characterized in that, It also includes a second bolt, which passes through one side of the second adjustment plate, enters the second waist hole and is screwed with the second sliding part. The length direction of the second bolt is consistent with the length direction of the second waist hole. The bolt is screwed with a second adjusting nut, and the second adjusting nut is located on the side of the second sliding part facing away from the screw rod, and the second adjusting nut is against the outer side of the second adjustment plate.

8. The chain tensioning mechanism according to claim 7, characterized in that, The second sliding portion is provided with a second screw hole, the second bolt is screwed into the second screw hole, and the second screw hole passes through the second sliding portion.

9. The chain tensioning mechanism according to claim 6, characterized in that, A second gasket is sleeved on the second screwing part, and the second gasket is located between the second screwing part and the second fixing nut.

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