Tensioning mechanism, synchronous pulley transmission device and belt conveyor

Abstract

The utility model relates to the technical field of synchronous pulley tensioning, in particular to a tensioning mechanism, a synchronous pulley transmission device and a belt conveyor. A supporting piece in the tensioning mechanism is used for being in transmission connection with a transmission shaft, a first synchronous belt wheel is provided with a strip-shaped hole, the strip-shaped hole extends in the radial direction of the first synchronous belt wheel, the circle center of an arc at one end of the strip-shaped hole coincides with the circle center of the first synchronous belt wheel, the supporting piece penetrates through the strip-shaped hole, and the first synchronous belt wheel is in sliding fit with the supporting piece. The first synchronous belt wheel has an eccentric state and a tensioning state, the tensioning mechanism achieves rapid tensioning of the synchronous cog belt, and the consistency of the tensioning degree is good. The utility model further provides a synchronous pulley transmission device, and the synchronous cog belt can be quickly assembled, disassembled and tensioned by the aid of the tensioning mechanism. The utility model further provides a belt conveyor, and the conveying efficiency of workpieces is improved by arranging the synchronous pulley transmission device.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronous pulley tensioning, in particular to a tensioning mechanism, a synchronous pulley transmission device and a belt conveyor. Background Art

[0002] In cigarette production, cigarette packs are mainly transported by belt conveyors. The transmission components on the belt conveyor are the key components connecting the reducer and the cigarette pack conveyor belt. Among them, the installation of the synchronous toothed belt is crucial, which directly carries the power transmission.

[0003] The existing synchronous toothed belt tensioning is adjusted by adjusting the position of the reducer mounting bracket, thereby adjusting the center distance between the two synchronous pulleys. However, due to the structure of the components, it is difficult to accurately measure the center distance between the two pulleys during adjustment. Moreover, it is difficult for each operator to ensure consistent tensioning when installing the synchronous toothed belt, which may cause the synchronous toothed belt to be over-tensioned or over-loose. Excessive tension or excessive looseness of the synchronous toothed belt will cause abnormal wear of the contact part of the outer peripheral surface of the pulley, abnormal wear of the pulley teeth, and abnormal operating noise. In severe cases, it will directly affect the transmission of the belt conveyor, causing the cigarette packs to be unable to be transported normally, and even causing the entire packaging unit to stop operating. Therefore, it is necessary to replace the abnormally worn synchronous toothed belt and synchronous pulley. However, during replacement, the same toothed belt tensioning problem is faced again. This vicious cycle repeats, which not only causes waste of spare parts, but also seriously affects production efficiency. Therefore, there is an urgent need for a tensioning mechanism to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a tensioning mechanism to facilitate the tensioning of a synchronous toothed belt and ensure an appropriate tensioning degree.

[0005] Another object of the present invention is to provide a synchronous belt transmission device, which facilitates the rapid disassembly and tensioning of the synchronous toothed belt by providing the above-mentioned tensioning mechanism.

[0006] The third object of the present utility model is to provide a belt conveyor, which improves the conveying efficiency of workpieces by providing the above-mentioned synchronous pulley transmission device.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] Tensioning mechanism, including:

[0009] A support member, used for transmission connection with the transmission shaft;

[0010] A first synchronous pulley is provided with a strip hole on the first synchronous pulley, and the strip hole extends radially along the first synchronous pulley, and the center of the arc at one end of the strip hole coincides with the center of the first synchronous pulley, and the support member is passed through the strip hole, and the first synchronous pulley slides with the support member, and the first synchronous pulley has an eccentric state and a tensioned state, and the eccentric state is that the center of the first synchronous pulley is spaced apart from the axis of the transmission shaft, and the tensioned state is that the center of the first synchronous pulley coincides with the axis of the transmission shaft, and when the first synchronous pulley is in the tensioned state, the first synchronous pulley and the support member are relatively fixed, so that the first synchronous pulley drives the support member to rotate.

[0011] Furthermore, the first synchronous pulley is provided with a first limiting groove, the first limiting groove is located on the two side edges of the strip hole, the extension direction of the first limiting groove is consistent with the extension direction of the adjustment hole, and the support member is provided with a boss, and the first limiting groove and the boss are slidably fitted.

[0012] Furthermore, a first through hole is provided on the first synchronous pulley, and a second through hole is provided on the support member. When the first synchronous pulley is in the tensioned state, a fastener is sequentially passed through the first through hole and the second through hole to fix the first synchronous pulley and the support member relatively.

[0013] Furthermore, the support member includes a first support portion and a second support portion, the first support portion is passed through the strip hole, the first support portion is used for transmission connection with the transmission shaft, the second support portion is fixed on both sides of the first support portion, one side of the second support portion is in contact with the first synchronous pulley, and the second through hole is provided on the second support portion.

[0014] Furthermore, the tensioning mechanism further includes a retaining spring, the first supporting portion is provided with a second limiting groove, the retaining spring is located in the second limiting groove, and the first synchronous pulley is located between the retaining spring and the second supporting portion.

[0015] Furthermore, the second through hole is a threaded hole, and the fastener is a screw, which passes through the first through hole and is screwed to the threaded hole.

[0016] Furthermore, the first supporting portion and the second supporting portion are an integrally formed structure.

[0017] Furthermore, the tensioning mechanism further includes two retaining rings, which are symmetrically arranged on both sides of the first synchronous pulley.

[0018] The synchronous pulley transmission device comprises a second synchronous pulley, a synchronous toothed belt and a tensioning mechanism as described in any of the above schemes, wherein the first synchronous pulley and the second synchronous pulley are connected by the synchronous toothed belt.

[0019] The belt conveyor comprises a driving member, a conveyor belt and the synchronous pulley transmission device as described above, wherein the driving member is in transmission connection with the synchronous pulley transmission device, and the synchronous pulley transmission device drives the conveyor belt to move through the transmission shaft.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a tensioning mechanism, which includes a support member and a first synchronous pulley. The support member is used for transmission connection with a transmission shaft. The first synchronous pulley is provided with a strip hole, which extends radially along the first synchronous pulley. The center of the arc at one end of the strip hole coincides with the center of the first synchronous pulley. The support member is inserted into the strip hole. The first synchronous pulley and the support member are slidably engaged. The first synchronous pulley has an eccentric state and a tensioned state. The eccentric state is when the center of the first synchronous pulley is spaced from the axis of the transmission shaft. The tensioned state is when the center of the first synchronous pulley coincides with the axis of the transmission shaft. The first synchronous pulley and the support member are relatively fixed so that the first synchronous pulley drives the support member to rotate. By providing the strip hole on the first synchronous pulley, the tensioning mechanism enables the first synchronous pulley to be in an adjustable state, thereby achieving rapid tensioning of the synchronous toothed belt and good tension consistency.

[0022] The utility model also provides a synchronous belt pulley transmission device, which has the functions of transmitting power and tensioning at the same time by arranging a tensioning mechanism, avoids the need for additional tensioning mechanism, and realizes the rapid disassembly and tensioning of the synchronous toothed belt.

[0023] The utility model also provides a belt conveyor, which ensures that the synchronous toothed belt is properly tensioned by arranging a synchronous pulley transmission device, reduces the wear of the synchronous toothed belt and the first synchronous pulley and the second synchronous pulley, and improves the conveying efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a tensioning mechanism provided by an embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of the eccentric state of the first synchronous pulley provided by an embodiment of the present utility model;

[0026] Figure 3 This is a structural schematic diagram of the first synchronous pulley in a tensioned state provided by an embodiment of the present utility model;

[0027] Figure 4This is a schematic structural diagram of a first synchronous pulley provided in an embodiment of the present utility model;

[0028] Figure 5 It is a structural schematic diagram of the support member provided by an embodiment of the utility model.

[0029] In the picture:

[0030] 1. Support member; 11. Boss; 12. First support portion; 121. Second limiting groove; 13. Second support portion; 131. Second through hole; 2. First synchronous pulley; 21. Strip hole; 22. First limiting groove; 23. First through hole; 3. Fastener; 4. Circlip; 5. Retaining ring; 6. Second synchronous pulley; 7. Synchronous toothed belt. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] The following combination Figure 1-Figure 5 The technical solution of the utility model is described in detail through specific implementation methods.

[0039] In order to facilitate the rapid disassembly and tensioning of the synchronous toothed belt, the embodiment of the present invention provides a synchronous pulley transmission device, which includes a second synchronous pulley 6, a synchronous toothed belt 7 and a tensioning mechanism, wherein the tensioning mechanism includes a support member 1 and a first synchronous pulley 2, the first synchronous pulley 2 and the second synchronous pulley 6 are connected by a synchronous toothed belt 7, the support member 1 is used to be connected to the transmission shaft, the first synchronous pulley 2 is provided with a strip hole 21, the strip hole 21 extends along the radial direction of the first synchronous pulley 2, and the strip hole The center of the arc at one end of 21 coincides with the center of the first synchronous pulley 2, the support member 1 is inserted into the strip hole 21, the first synchronous pulley 2 and the support member 1 slide together, the first synchronous pulley 2 has an eccentric state and a tensioned state, the eccentric state is that the center of the first synchronous pulley 2 is spaced apart from the axis of the transmission shaft, the tensioned state is that the center of the first synchronous pulley 2 coincides with the axis of the transmission shaft, and when the first synchronous pulley 2 is in the tensioned state, it is relatively fixed to the support member 1, so that the first synchronous pulley 2 drives the support member 1 to rotate.

[0040] Specifically, when the synchronous toothed belt 7 needs to be replaced, it is sleeved over the outer rings of the first and second synchronous pulleys 2 and 6. The support member 1 is inserted through the strip hole 21 provided on the first synchronous pulley 2, and the center of the circle of the first synchronous pulley 2 is spaced apart from the axis of the drive shaft, that is, the first synchronous pulley 2 is in an eccentric state. When the drive shaft is rotated, the first synchronous pulley 2 rotates with the drive shaft and slides relative to the support member 1. The center distance between the first and second synchronous pulleys 2 and 6 gradually increases. At the same time, the synchronous toothed belt 7 is continuously tightened, generating a force on the first synchronous pulley 2. When the center of mass of the first synchronous pulley 2 rotates above the center of the circle, the added weight of the first synchronous pulley 2 ends the eccentric state of the first synchronous pulley 2, and the center of the circle of the first synchronous pulley 2 coincides with the axis of the drive shaft. At this point, the first synchronous pulley 2 is in a tensioned state, and the synchronous toothed belt 7 is completely tensioned. By providing a strip-shaped hole 21 on the first synchronous pulley 2, the tensioning mechanism allows for an adjustable center distance between the first and second synchronous pulleys 2, 6. This allows for rapid tensioning of the synchronous toothed belt 7 with consistent tensioning. This synchronous pulley transmission device simultaneously transmits power and provides tensioning, eliminating the need for an additional tensioning mechanism and enabling rapid assembly, disassembly, and tensioning of the synchronous toothed belt 7.

[0041] Furthermore, the center of the arc at one end of the strip hole 21 coincides with the center of the first synchronous pulley 2. When installing the synchronous toothed belt 7, the center of the other end of the strip hole 21 coincides with the axis of the transmission shaft. At this time, the center distance between the first synchronous pulley 2 and the second synchronous pulley 6 is minimized, which can facilitate the installation of the synchronous toothed belt 7.

[0042] Furthermore, a first through hole 23 is provided on the first synchronous pulley 2, and a second through hole 131 is provided on the support member 1. When the first synchronous pulley 2 is in a tensioned state, the fastener 3 is sequentially passed through the first through hole 23 and the second through hole 131, so that the first synchronous pulley 2 and the support member 1 are relatively fixed, thereby allowing the first synchronous pulley 2 to drive the support member 1 to rotate. Optionally, the second through hole 131 is a threaded hole, and the fastener 3 is a screw. The screw passes through the first through hole 23 and is screwed to the threaded hole to relatively fix the first synchronous pulley 2 and the support member 1. In this embodiment, there are two first through holes 23, and the two first through holes 23 are symmetrically arranged on both sides of the strip hole 21. The first through hole 23, the second through hole 131 and the screw are arranged in a one-to-one correspondence to ensure that the first synchronous pulley 2 and the support member 1 are reliably fixed in the tensioned state. It should be noted that the number of first through holes 23 is set according to the working conditions and is not specifically limited here.

[0043] Furthermore, if Figure 4 and Figure 5As shown, the first synchronous pulley 2 is provided with a first limiting groove 22, which is located on both side edges of the strip hole 21. The extension direction of the first limiting groove 22 is consistent with the extension direction of the strip hole 21. The support member 1 is provided with a boss 11, and the first limiting groove 22 and the boss 11 are slidably engaged. In this embodiment, there are two first limiting grooves 22, and the two first limiting grooves 22 are respectively located on the edges between the two end arcs of the strip hole 21. The extension direction is consistent with the extension direction of the strip hole 21. Correspondingly, there are two bosses 11. The first limiting groove 22 and the boss 11 are slidably engaged, and the first synchronous pulley 2 slides along the extension direction of the first limiting groove 22, ensuring that the first synchronous pulley 2 does not rotate relative to the support member 1 during the sliding process.

[0044] Furthermore, the support member 1 includes a first support portion 12 and a second support portion 13. The first support portion 12 is provided through the strip-shaped hole 21 and is in transmission connection with the transmission shaft. The second support portion 13 is fixedly provided on both sides of the first support portion 12. One side of the second support portion 13 abuts against the first synchronous pulley 2. The second through hole 131 is provided on the second support portion 13. The second support portion 13 abuts against one side of the first synchronous pulley 2, so that the first synchronous pulley 2 and the first support portion 12 are tightly fitted at the contact point. The screws are used to fix them, ensuring the smooth rotation of the support member 1 driven by the first synchronous pulley 2.

[0045] Furthermore, the tensioning mechanism also includes a retaining spring 4. The first support portion 12 is provided with a second limiting groove 121. The retaining spring 4 is located in the second limiting groove 121. The first synchronous pulley 2 is located between the retaining spring 4 and the second support portion 13. In this embodiment, the second support portion 13 is located at one end of the first support portion 12, and the second limiting groove 121 is located at the other end of the first support portion 12. The portion of the first support portion 12 between the second limiting groove 121 and the second support portion 13 is passed through the strip hole 21. The retaining spring 4 is installed in the first limiting groove 22. The retaining spring 4 and the second support portion 13 work together to prevent the first synchronous pulley 2 from falling off the support member 1 when sliding along the first limiting groove 22.

[0046] Furthermore, a keyway is provided on the first support portion 12 , in which a key is installed. The support member 1 and the transmission shaft are connected via the key, thereby ensuring the stability of power transmission between the support member 1 and the transmission shaft.

[0047] Optionally, the first support portion 12 and the second support portion 13 are integrally formed, which facilitates processing and ensures the consistency of the performance of the support member 1. The first support portion 12 and the second support portion 13 can be processed by CNC machining, which is not specifically limited here.

[0048] To prevent the synchronous toothed belt 7 from deviating from the first synchronous pulley 2 during transmission, the tensioning mechanism further includes two retaining rings 5, which are symmetrically arranged on either side of the first synchronous pulley 2. In this embodiment, the two retaining rings 5 ​​are fixedly connected to the first synchronous pulley 2 by screws, and the edges of the two retaining rings 5 ​​extend beyond the outer circumference of the first synchronous pulley 2, thereby preventing the synchronous toothed belt 7 from deviating from the first synchronous pulley 2 during transmission.

[0049] The present invention also provides a belt conveyor for conveying cigarette packs, comprising a drive member, a conveyor belt, and a synchronous pulley transmission device. The drive member is in transmission connection with the synchronous pulley transmission device, which drives the conveyor belt via a transmission shaft. In this embodiment, the second synchronous pulley 6 is a driving pulley, the first synchronous pulley 2 is a driven pulley, and a tensioning mechanism is provided on the driven pulley. The drive member is in transmission connection with the second synchronous pulley 6, driving the second synchronous pulley 6 to rotate. The second synchronous pulley 6 transmits power to the first synchronous pulley 2 via a synchronous toothed belt 7. The first synchronous pulley 2 is in transmission connection with the transmission shaft, which is in transmission connection with the conveyor belt, thereby driving the conveyor belt to move, thereby conveying cigarette packs on the belt conveyor. By providing the synchronous pulley transmission device, the belt conveyor ensures that the synchronous toothed belt 7 is properly tensioned, reduces wear on the synchronous toothed belt, the first synchronous pulley 2, and the second synchronous pulley 6, and improves the conveying efficiency of cigarette packs.

[0050] In some other embodiments, the first synchronous pulley 2 is the driving pulley, the second synchronous pulley 6 is the driven pulley, and the tensioning mechanism is provided on the driving pulley. A driving member is in transmission connection with the first synchronous pulley 2, which drives the first synchronous pulley 2 to rotate. The first synchronous pulley 2 transmits power to the second synchronous pulley 6 via a synchronous toothed belt 7. The second synchronous pulley 6 is in transmission connection with the drive shaft, which is in transmission connection with the conveyor belt, thereby driving the conveyor belt to transport cigarette packs on the belt conveyor.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Tensioning mechanism, characterized in that: include: A support member (1) is used for transmission connection with the transmission shaft; A first synchronous pulley (2), wherein a strip hole (21) is provided on the first synchronous pulley (2), wherein the strip hole (21) extends radially along the first synchronous pulley (2), and the center of the arc at one end of the strip hole (21) coincides with the center of the first synchronous pulley (2), and the support member (1) is inserted into the strip hole (21), and the first synchronous pulley (2) and the support member (1) are slidably matched, and the first synchronous pulley (2) has an eccentric state and a tensioned state, wherein the eccentric state is that the center of the first synchronous pulley (2) and the axis of the transmission shaft are spaced apart, and the tensioned state is that the center of the first synchronous pulley (2) and the axis of the transmission shaft coincide with each other, and when the first synchronous pulley (2) is in the tensioned state, the first synchronous pulley (2) and the support member (1) are relatively fixed, so that the first synchronous pulley (2) drives the support member (1) to rotate.

2. The tensioning mechanism according to claim 1, characterized in that: The first synchronous pulley (2) is provided with a first limiting groove (22), the first limiting groove (22) is located on the two side edges of the strip hole (21), the extension direction of the first limiting groove (22) is consistent with the extension direction of the strip hole (21), and the support member (1) is provided with a boss (11), and the first limiting groove (22) and the boss (11) are slidably matched.

3. The tensioning mechanism according to claim 1, characterized in that: The first synchronous pulley (2) is provided with a first through hole (23), and the support member (1) is provided with a second through hole (131). When the first synchronous pulley (2) is in the tensioned state, the fastener (3) is sequentially passed through the first through hole (23) and the second through hole (131) to fix the first synchronous pulley (2) and the support member (1) relative to each other.

4. The tensioning mechanism according to claim 3, characterized in that: The support member (1) comprises a first support portion (12) and a second support portion (13), wherein the first support portion (12) is passed through the strip-shaped hole (21), and the first support portion (12) is used for transmission connection with the transmission shaft, and the second support portion (13) is fixed on both sides of the first support portion (12), one side of the second support portion (13) is in contact with the first synchronous pulley (2), and the second through hole (131) is provided on the second support portion (13).

5. The tensioning mechanism according to claim 4, characterized in that: The tensioning mechanism further comprises a retaining spring (4), the first supporting portion (12) is provided with a second limiting groove (121), the retaining spring (4) is located in the second limiting groove (121), and the first synchronous pulley (2) is located between the retaining spring (4) and the second supporting portion (13).

6. The tensioning mechanism according to claim 3, characterized in that: The second through hole (131) is a threaded hole, and the fastener (3) is a screw, which passes through the first through hole (23) and is screwed to the threaded hole.

7. The tensioning mechanism according to claim 4, characterized in that: The first supporting portion (12) and the second supporting portion (13) are an integrally formed structure.

8. The tensioning mechanism according to any one of claims 1 to 7, characterized in that: The tensioning mechanism further comprises two retaining rings (5), and the two retaining rings (5) are symmetrically arranged on both sides of the first synchronous pulley (2).

9. Synchronous belt pulley transmission device, characterized in that: It comprises a second synchronous pulley (6), a synchronous toothed belt (7) and a tensioning mechanism according to any one of claims 1 to 8, wherein the first synchronous pulley (2) and the second synchronous pulley (6) are connected by transmission via the synchronous toothed belt (7).

10. Belt conveyor, characterized in that, It comprises a driving member, a conveyor belt and the synchronous pulley transmission device according to claim 9, wherein the driving member is in transmission connection with the synchronous pulley transmission device, and the synchronous pulley transmission device drives the conveyor belt to move through the transmission shaft.

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