Chain tensioning device

Abstract

The utility model relates to the technical field of tensioning devices, in particular to a chain tensioning device which comprises a mast, one end of the mast is fixedly connected with a mast bottom plate through bolts, the inner wall of the mast is fixedly connected with four guide rail plates, and the guide rail plates are located at the positions, close to one end of the mast bottom plate, of the mast. The four guide rail plates are located at the four corners of the mast respectively, and supporting plates are jointly connected between the two guide rail plates on the upper side and the two corresponding guide rail plates on the lower side in a sliding mode. The positions of the supporting plate and the tensioning wheel relative to the mast bottom plate are adjusted through the lead screw, the chain can be effectively tensioned without any operation on the chain, the adjustment amplitude can be arbitrary according to the lead screw, operation is easy, time and labor are saved, and working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to a tensioning device, in particular to a chain tensioning device, and belongs to the technical field of chain tensioning. Background Art

[0002] A chain is generally an assembly of identical or identically spaced components connected in series in the form of a kinematic pair. Chains are widely used in many fields. For example, in mechanical transmission, chains can transfer power from one rotating component to another. Chain transmission is a mechanical transmission method that can work stably in harsh environments, is not prone to failure, can transmit greater power and torque, can ensure precise transmission ratios, and can be used in a variety of different mechanical devices.

[0003] Chains are often used in various mechanical devices. After the mechanical device has been used for a period of time, the chain will wear and loosen after a long period of transmission, resulting in a decrease in the tension of the chain. The chain needs to be tightened. The traditional processing method is generally to disassemble the next section of the chain and then connect the openings. In this process, tightening the chain is rather cumbersome, time-consuming and labor-intensive, which increases downtime and greatly reduces work efficiency.

[0004] Therefore, it is urgent to improve the chain tensioner to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a chain tensioning device, which drives the screw rod to move in the direction close to the mast base plate by rotating No. 1 nut, the screw rod drives the tensioning body to move, the tensioning body drives the support plate to slide on the guide plate, the support plate drives the pin shaft to move in the direction of the mast base plate, the pin shaft moves toward the mast base plate to tighten the chain, so that the chain can be tightened. The chain tensioning device is easy and quick to adjust, and the position of the support plate and the tensioning wheel relative to the mast base plate is adjusted by the screw rod. The chain can be effectively tightened without any operation on the chain, and the adjustment range can be arbitrarily adjusted according to the screw rod. The operation is simple, time-saving and labor-saving, and work efficiency is greatly improved.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include: comprising a mast, one end of the mast is fixedly connected to the mast base plate by bolts, four guide plates are fixedly connected to the inner wall of the mast, the guide plate is located at one end of the mast close to the mast base plate, the four guide plates are respectively located at the four corners of the mast, and the two upper guide plates are respectively slidably connected to the two corresponding lower guide plates with a support plate.

[0007] Preferably, a pin shaft and a tensioning body are commonly fixedly connected on one side of the two support plates close to each other, the tensioning body is located between the pin shaft and the mast base plate, both ends of the pin shaft respectively extend to the outside of the side walls of the two support plates away from each other, and a fixed shaft is fixedly connected to both side walls of the tensioning body close to the support plates, and one end of the fixed shaft away from the tensioning body extends to the outside of the side walls of the support plates away from each other.

[0008] Preferably, a screw rod is fixedly connected to one side wall of the tensioning body, the screw rod is located at the center of the tensioning body, one end of the screw rod extends to the outside of the side wall of the mast base plate away from the mast and is threadedly connected with a No. 1 nut and a No. 2 nut, one end of the No. 1 nut contacts the side wall of the mast base plate away from the mast, the other end of the No. 1 nut contacts one end of the No. 2 nut, and the other end of the screw rod extends to the outside of the other side of the tensioning body.

[0009] Preferably, a tension wheel is rotatably connected to the outer wall of the pin shaft via a bearing, the tension wheel is centrally placed with respect to the pin shaft, and the tension wheel is located between the two support plates.

[0010] Preferably, a through hole No. 1 is provided on the upper surface of the mast, and the through hole No. 1 is located above the tensioning wheel. An end of the mast away from the mast bottom plate is fixedly connected to a fixing plate.

[0011] Preferably, a No. 2 through hole and a No. 3 through hole are opened on a side wall of one side of the fixing plate, the inner bottom wall of the No. 2 through hole is flush with the upper surface of the mast, and the inner bottom wall of the No. 3 through hole is flush with the inner bottom wall of the mast.

[0012] Preferably, a chain is engaged on the outer wall of the pin shaft, one end of the chain passes through the No. 1 through hole and through the No. 2 through hole along the upper surface of the mast, and the other end of the chain passes through the No. 3 through hole along the inner bottom wall of the mast and is connected to one end of the chain passing through the No. 2 through hole.

[0013] The utility model has at least the following beneficial effects:

[0014] 1. By rotating the No. 1 nut, the screw rod is driven to move toward the direction close to the mast base plate, the screw rod drives the tensioner to move, the tensioner drives the support plate to slide on the guide plate, the support plate drives the pin shaft to move toward the direction of the mast base plate, the pin shaft moves toward the mast base plate to tighten the chain, so that the chain can be tightened. This chain tensioning device is easy and quick to adjust. The position of the support plate and the tensioning wheel relative to the mast base plate is adjusted by the screw rod. The chain can be effectively tightened without any operation on the chain. The adjustment range can be arbitrarily adjusted according to the screw rod. The operation is simple, time-saving and labor-saving, and work efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A three-dimensional schematic diagram provided for the utility model;

[0017] Figure 2 The utility model provides Figure 1 The enlarged schematic diagram at A in the middle;

[0018] Figure 3 The utility model provides a cross-sectional view Figure 1 Schematic diagram;

[0019] Figure 4 The utility model provides a cross-sectional view Figure 2 Schematic diagram;

[0020] Figure 5 This is a partial schematic diagram provided by the utility model.

[0021] In the figure, 1, mast; 11, guide plate; 12, through hole No. 1; 13, fixed plate; 14, through hole No. 2; 15, through hole No. 3; 2, mast bottom plate; 3, support plate; 4, pin shaft; 41, tensioner wheel; 5, tensioner; 51, fixed shaft; 52, screw rod; 53, nut No. 1; 54, nut No. 2; 6, chain. DETAILED DESCRIPTION

[0022] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] like Figure 1-Figure 5As shown, in the chain tensioning device provided by the present embodiment, one end of the mast 1 is fixedly connected to the mast bottom plate 2 by bolts, four guide plates 11 are fixedly connected to the inner wall of the mast 1, the guide plate 11 is located at one end of the mast 1 close to the mast bottom plate 2, the four guide plates 11 are respectively located at the four corners of the mast 1, the two upper guide plates 11 are respectively connected to the two corresponding lower guide plates 11 by a support plate 3, the two support plates 3 are fixedly connected to the pin shaft 4 and the tensioner 5 on the side close to each other, the tensioner 5 is located at the pin shaft Between the shaft 4 and the mast base plate 2, both ends of the pin shaft 4 extend to the outside of the side walls of the two support plates 3 that are away from each other. The side walls of the tensioner 5 close to the support plate 3 are fixedly connected with fixed shafts 51. The end of the fixed shaft 51 away from the tensioner 5 extends to the outside of the side walls of the support plates 3 that are away from each other. The mast base plate 2 is used to cooperate with the No. 1 nut 53 and the screw rod 52 to drive the tensioner 5 to move. The guide plate 11 provides support for the sliding of the support plate 3. The pin shaft 4 is used to support the tensioner wheel 41. The tensioner 5 is used to drive the support plate 3 to move.

[0024] Secondly, if Figure 1 as well as Figure 3 As shown, a screw rod 52 is fixedly connected to one side wall of the tensioner 5, and the screw rod 52 is located at the center of the tensioner 5. One end of the screw rod 52 extends to the outside of the side wall of the mast base plate 2 away from the mast 1 and is threadedly connected with a No. 1 nut 53 and a No. 2 nut 54. One end of the No. 1 nut 53 contacts the side wall of the mast base plate 2 away from the mast 1, and the other end of the No. 1 nut 53 contacts one end of the No. 2 nut 54. The other end of the screw rod 52 extends to the outside of the other side of the tensioner 5. The screw rod 52 and the No. 1 nut 53 are used to adjust the distance of the tensioner 5 relative to the mast base plate 2, and the No. 2 nut 54 is used to lock the position of the No. 1 nut 53.

[0025] Further, such as Figure 1 as well as Figure 3 As shown, a tensioner wheel 41 is rotatably connected to the outer wall of the pin shaft 4 via a bearing. The tensioner wheel 41 is placed centrally with respect to the pin shaft 4 and is located between the two support plates 3 . The tensioner wheel 41 is used to connect the chain 6 .

[0026] Furthermore, if Figure 1 as well as Figure 4As shown, a through hole No. 12 is provided on the upper surface of the mast 1, and the through hole No. 12 is located above the tensioning wheel 41. A fixing plate 13 is fixedly connected to one end of the mast 1 away from the mast base plate 2. A through hole No. 2 14 and a through hole No. 3 15 are provided on a side wall of the fixing plate 13. The inner bottom wall of the through hole No. 2 14 is flush with the upper surface of the mast 1, and the inner bottom wall of the through hole No. 3 15 is flush with the inner bottom wall of the mast 1. The through hole No. 12, the through hole No. 2 14 and the through hole No. 3 15 are used to pass the chain 6 to provide support for the connection between the two ends of the chain 6.

[0027] Furthermore, Figure 1 as well as Figure 4 As shown, a chain 6 is meshed on the outer wall of the pin shaft 4, one end of the chain 6 passes through the No. 1 through hole 12 and passes through the No. 2 through hole 14 along the upper surface of the mast 1, and the other end of the chain 6 passes through the No. 3 through hole 15 along the inner bottom wall of the mast 1 and is connected to one end of the chain 6 passing through the No. 2 through hole 14.

[0028] like Figure 1-Figure 5 As shown, the principle of the chain tensioner provided in this embodiment is as follows: when using this chain tensioner, loosen the No. 2 nut 54 and loosen it in the opposite direction for a certain distance, tighten the No. 1 nut 53, and under the action of the mast base plate 2, the No. 1 nut 53 drives the screw rod 52 to move in the direction of the mast base plate 2, and the screw rod 52 drives the tensioner 5 and the fixed shaft 51 to move in the direction of the mast base plate 2. The tensioner 5 and the fixed shaft 51 drive the support plate 3 to move in the direction of the mast base plate 2. Under the action of the support plate 3, the pin shaft 4 and the tensioning wheel 41 move in the direction of the mast base plate 2. Under the action of the tensioning wheel 41 and the pin shaft 4, the chain 6 will be driven to move in the direction of the mast base plate 2, and then the chain 6 will be tightened. When the chain 6 is tightened, lock the No. 2 nut 54 to fix the position of the No. 1 nut 53.

[0029] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0030] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0031] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A chain tensioner, comprising a mast (1), characterized in that: One end of the mast (1) is fixedly connected to a mast base plate (2) by bolts, and four guide rail plates (11) are fixedly connected to the inner wall of the mast (1), the guide rail plate (11) is located at one end of the mast (1) close to the mast base plate (2), and the four guide rail plates (11) are respectively located at four corners of the mast (1), and a support plate (3) is slidably connected between the two upper guide rail plates (11) and the two corresponding lower guide rail plates (11), and the two support plates ( 3) are fixedly connected to a pin shaft (4) and a tensioning body (5) on one side close to each other, the tensioning body (5) is located between the pin shaft (4) and the mast bottom plate (2), the two ends of the pin shaft (4) respectively extend to the outside of the side walls of the two support plates (3) that are away from each other, the side walls of the tensioning body (5) close to the support plate (3) are fixedly connected to a fixed shaft (51), and the end of the fixed shaft (51) away from the tensioning body (5) extends to the outside of the side walls of the support plates (3) that are away from each other.

2. A chain tensioner according to claim 1, characterized in that: A screw rod (52) is fixedly connected to a side wall of one side of the tensioning body (5), and the screw rod (52) is located at the center of the tensioning body (5). One end of the screw rod (52) extends to the outside of the side wall of the mast base plate (2) away from the mast (1) and is threadedly connected to a first nut (53) and a second nut (54). One end of the first nut (53) contacts the side wall of the mast base plate (2) away from the mast (1), and the other end of the first nut (53) contacts one end of the second nut (54). The other end of the screw rod (52) extends to the outside of the other side of the tensioning body (5).

3. A chain tensioner according to claim 2, characterized in that: A tension wheel (41) is rotatably connected to the outer wall of the pin shaft (4) via a bearing. The tension wheel (41) is placed centrally with respect to the pin shaft (4). The tension wheel (41) is located between the two support plates (3).

4. A chain tensioner according to claim 3, characterized in that: A through hole No. 1 (12) is provided on the upper surface of the mast (1), the through hole No. 1 (12) being located above the tensioning wheel (41), and a fixing plate (13) is fixedly connected to one end of the mast (1) away from the mast bottom plate (2).

5. A chain tensioner according to claim 4, characterized in that: A second through hole (14) and a third through hole (15) are provided on a side wall of one side of the fixing plate (13); the inner bottom wall of the second through hole (14) is flush with the upper surface of the mast (1); and the inner bottom wall of the third through hole (15) is flush with the inner bottom wall of the mast (1).

6. A chain tensioner according to claim 5, characterized in that: A chain (6) is meshed on the outer wall of the pin shaft (4); one end of the chain (6) passes through the No. 1 through hole (12) and passes through the No. 2 through hole (14) along the upper surface of the mast (1); the other end of the chain (6) passes through the No. 3 through hole (15) along the inner bottom wall of the mast (1) and is connected to the end of the chain (6) passing through the No. 2 through hole (14).

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