Chain tensioning device

Abstract

The utility model discloses a chain tensioning device which comprises two cross plates, protection plates are connected to the four corners of the two cross plates in a rotating mode, adjusting mechanisms used for adjusting the protection plates are arranged on the two cross plates, two tensioning chain wheels are arranged between the two cross plates, and the two tensioning chain wheels are connected with the two cross plates in a rotating mode. The two cross plates are provided with lifting mechanisms used for lifting the two tensioning chain wheels. According to the chain tensioning device, the chain can be tensioned conveniently and can be protected, and the situation that the chain is disengaged is avoided.

Description

Technical Field

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

[0002] There are many types of chains, but their basic structures are only the following, and the others are all deformations of these types. We can see from the above chain structures that most chains are composed of chain plates, chain pins, bushings and other components. Other types of chains just make different changes to the chain plates according to different needs. Some have scrapers installed on the chain plates, some have guide bearings installed on the chain plates, and some have rollers installed on the chain plates, etc. These are all modifications for use in different application scenarios.

[0003] After the existing chain has been used for a long time, the chain will become loose and easily come off during operation. The chain needs to be adjusted frequently, which is complicated and time-consuming.

[0004] Therefore, we propose a chain tensioning device to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art and proposes a chain tensioning device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A chain tensioning device comprises two cross plates, the four corners of the two cross plates are rotatably connected with protective plates, the two cross plates are provided with adjustment mechanisms for adjusting the protective plates, two tensioning sprockets are provided between the two cross plates, and the two cross plates are provided with lifting mechanisms for lifting the two tensioning sprockets.

[0008] Preferably, the adjusting mechanism comprises four first bidirectional threaded rods, which are arranged between two cross plates, and grooves are provided at the upper and lower ends of the transverse arms of the two cross plates, and the four first bidirectional threaded rods are respectively rotated to pass through the eight grooves, and two threaded blocks are threadedly sleeved on the outsides of the four first bidirectional threaded rods, and the eight threaded blocks are respectively slidably connected to the inner side walls of the eight grooves, and one end of the four first bidirectional threaded rods is rotated to pass through the cross plate and is connected through the first transmission mechanism, and one end of one of the first bidirectional threaded rods is rotated to pass through the cross plate and is coaxially fixedly connected with the first rotating handle, and the ends of the eight threaded blocks away from the bottom of the groove are all rotatably connected to the deflection plate, and the ends of the eight deflection plates away from the thread blocks are respectively rotatably connected to the eight protective plates.

[0009] Preferably, the first transmission mechanism includes four first pulleys, the four first pulleys are coaxially fixedly connected to four first bidirectional threaded rods respectively, and the four first pulleys are connected through synchronous belt transmission.

[0010] Preferably, the two threaded blocks located outside the same first bidirectional threaded rod are both provided with threaded holes matching the first bidirectional threaded rod, and the threads in the two threaded holes have opposite rotation directions.

[0011] Preferably, the lifting mechanism includes two through holes respectively arranged on the two cross plates, and the two through holes are rotatably connected with a second bidirectional threaded rod, the lower ends of the two second bidirectional threaded rods are rotatably passed through the cross plate and are connected through the second transmission mechanism, the upper end of one of the second bidirectional threaded rods is rotatably passed through the cross plate and is coaxially fixedly connected with the second rotating handle, and the two second bidirectional threaded rods are externally threadedly sleeved with lifting blocks, the two lifting blocks are respectively slidably connected to the inner side walls of the two through holes, and the two ends of the two tensioning sprockets are respectively rotatably connected to the four lifting blocks.

[0012] Preferably, the second transmission mechanism comprises two second pulleys, the two second pulleys are respectively coaxially fixedly connected to two second bidirectional threaded rods, and the two second pulleys are connected via a synchronous belt transmission.

[0013] Preferably, the two lifting blocks located outside the same second bidirectional threaded rod are both provided with threaded holes matching the second bidirectional threaded rod, and the threads in the two threaded holes have opposite rotation directions.

[0014] Preferably, the external thread sleeve of the second bidirectional threaded rod is provided with four fastening nuts, the four fastening nuts are located between the two lifting blocks, and the four fastening nuts correspond to the two lifting blocks.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By setting an adjusting mechanism and a lifting mechanism, the second rotating handle drives the two second bidirectional threaded rods to rotate, the two second bidirectional threaded rods drive the four lifting blocks to lift and lower, the four lifting blocks drive the two tensioning sprockets to lift and lower, the chain can be tensioned during the lifting process, and after the tensioning is completed, a plurality of fastening nuts are rotated to tighten the lifting blocks to complete the tensioning of the chain, and the tensioning is relatively convenient, the first rotating handle drives the four first bidirectional threaded rods to rotate, the first bidirectional threaded rod drives the eight threaded blocks to move relatively, the eight threaded blocks drive the protective plate to rotate through the eight deflection plates until they are in a suitable position, and the chain can be protected, and even if the chain is loose when the chain is running, the chain can be prevented from being derailed.

[0017] The utility model is convenient for tensioning the chain and can protect the chain to avoid the chain from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front structural schematic diagram of a chain tensioning device proposed by the utility model;

[0019] Figure 2 This is a front structural perspective view of a chain tensioning device proposed by the utility model;

[0020] Figure 3 The utility model is a side structural perspective view of a chain tensioning device.

[0021] In the figure: 1 cross plate, 2 protective plate, 3 adjustment mechanism, 4 tensioning sprocket, 5 lifting mechanism, 6 first bidirectional threaded rod, 7 groove, 8 threaded block, 9 first transmission mechanism, 10 first rotating handle, 11 deflection plate, 12 first pulley, 13 through hole, 14 second bidirectional threaded rod, 15 second transmission mechanism, 16 second rotating handle, 17 lifting block, 18 second pulley, 19 fastening nut. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0028] Reference Figure 1-3 A chain tensioning device comprises two cross plates 1, and protective plates 2 are rotatably connected at the four corners of the two cross plates 1. The two cross plates 1 are provided with adjustment mechanisms 3 for adjusting the protective plates 2. Specifically, the adjustment mechanism 3 comprises four first bidirectional threaded rods 6, and the four first bidirectional threaded rods 6 are arranged between the two cross plates 1. Grooves 7 are arranged at the upper and lower ends of the transverse arms of the two cross plates 1. The four first bidirectional threaded rods 6 are rotated to pass through the eight grooves 7 respectively, and two threaded blocks 8 are threadedly sleeved on the outside of the four first bidirectional threaded rods 6. It is worth mentioning that the two threaded blocks 8 located outside the same first bidirectional threaded rod 6 are provided with threaded holes matching the first bidirectional threaded rod 6.

[0029] In the utility model, the threads in the two threaded holes have opposite rotation directions, and the eight threaded blocks 8 are respectively slidably connected to the inner walls of the eight grooves 7. One ends of the four first bidirectional threaded rods 6 rotate to penetrate the cross plate 1 and are connected through the first transmission mechanism 9. It should be noted that the first transmission mechanism 9 includes four first pulleys 12, and the four first pulleys 12 are respectively coaxially fixedly connected to the four first bidirectional threaded rods 6. The four first pulleys 12 are connected through synchronous belt transmission, and one end of one of the first bidirectional threaded rods 6 rotates to penetrate the cross plate 1 and is coaxially fixedly connected to the first rotating handle 10. The ends of the eight threaded blocks 8 away from the bottom of the groove 7 are all rotatably connected to the deflection plate 11.

[0030] In the utility model, the ends of the eight deflection plates 11 away from the threaded blocks 8 are rotatably connected to the eight protective plates 2 respectively, two tensioning sprockets 4 are arranged between the two cross plates 1, and the two cross plates 1 are provided with a lifting mechanism 5 for lifting the two tensioning sprockets 4. It should be noted that the lifting mechanism 5 includes two through holes 13 respectively arranged on the two cross plates 1, and the two through holes 13 are rotatably connected with second bidirectional threaded rods 14. The lower ends of the two second bidirectional threaded rods 14 are rotatably passed through the cross plate 1 and are connected through a second transmission mechanism 15. Further, the second transmission mechanism 15 includes two second pulleys 18, and the two second pulleys 18 are coaxially fixedly connected to the two second bidirectional threaded rods 14 respectively, and the two second pulleys 18 are connected through a synchronous belt transmission.

[0031] In the utility model, the upper end of one of the second bidirectional threaded rods 14 rotates to pass through the cross plate 1 and is coaxially fixedly connected with the second turning handle 16. The two second bidirectional threaded rods 14 are both threadedly sleeved with lifting blocks 17. It should be noted that the two lifting blocks 17 located outside the same second bidirectional threaded rod 14 are both provided with threaded holes matching the second bidirectional threaded rod 14. The threads in the two threaded holes have opposite rotation directions. The two lifting blocks 17 are respectively slidably connected to the inner side walls of the two through holes 13, and the two ends of the two tensioning sprockets 4 are respectively rotatably connected to the four lifting blocks 17. It should be noted that the second bidirectional threaded rod 14 is threadedly sleeved with four fastening nuts 19, and the four fastening nuts 19 are located between the two lifting blocks 17, and the four fastening nuts 19 correspond to the two lifting blocks 17.

[0032] In the utility model, the second rotating handle 16 drives the two second bidirectional threaded rods 14 to rotate, the two second bidirectional threaded rods 14 drive the four lifting blocks 17 to lift, the four lifting blocks 17 drive the two tensioning sprockets 4 to lift, the chain can be tensioned during the lifting process, after the tensioning is completed, the multiple fastening nuts 19 are rotated to tighten the lifting blocks 17, and the chain tensioning can be completed, the four first bidirectional threaded rods 6 are driven to rotate by the first rotating handle 10, the first bidirectional threaded rods 6 drive the eight threaded blocks 8 to move relatively, the eight threaded blocks 8 drive the protective plate 2 to rotate through the eight deflection plates 11 until it is in a suitable position, and the chain can be protected.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A chain tensioning device, characterized in that: The invention comprises two cross plates (1), the four corners of the two cross plates (1) are rotatably connected to protective plates (2), the two cross plates (1) are provided with adjustment mechanisms (3) for adjusting the protective plates (2), two tensioning sprockets (4) are provided between the two cross plates (1), and the two cross plates (1) are provided with lifting mechanisms (5) for lifting the two tensioning sprockets (4).

2. A chain tensioning device according to claim 1, characterized in that: The adjustment mechanism (3) comprises four first bidirectional threaded rods (6), which are arranged between two cross plates (1). The upper and lower ends of the transverse arms of the two cross plates (1) are provided with grooves (7). The four first bidirectional threaded rods (6) are respectively rotatably connected to the eight grooves (7). The four first bidirectional threaded rods (6) are respectively threadedly sleeved with two threaded blocks (8). The eight threaded blocks (8) are respectively slidably connected to the inner side walls of the eight grooves (7). One end of the four first bidirectional threaded rods (6) is rotatably connected to the cross plate (1) and is transmission-connected through a first transmission mechanism (9). One end of one of the first bidirectional threaded rods (6) is rotatably connected to the cross plate (1) and is coaxially fixedly connected to a first rotating handle (10). The ends of the eight threaded blocks (8) away from the inner bottom of the groove (7) are all rotatably connected to a deflection plate (11). The ends of the eight deflection plates (11) away from the threaded blocks (8) are respectively rotatably connected to the eight protective plates (2).

3. A chain tensioning device according to claim 2, characterized in that: The first transmission mechanism (9) comprises four first pulleys (12), the four first pulleys (12) are respectively coaxially fixedly connected to four first bidirectional threaded rods (6), and the four first pulleys (12) are connected to each other through a synchronous belt transmission.

4. A chain tensioning device according to claim 2, characterized in that: The two threaded blocks (8) located outside the same first bidirectional threaded rod (6) are both provided with threaded holes matching the first bidirectional threaded rod (6), and the threads in the two threaded holes have opposite rotation directions.

5. A chain tensioning device according to claim 1, characterized in that: The lifting mechanism (5) comprises two through holes (13) respectively arranged on the two cross plates (1), the two through holes (13) are rotatably connected with a second bidirectional threaded rod (14), the lower ends of the two second bidirectional threaded rods (14) are rotatably passed through the cross plate (1) and are transmission-connected through a second transmission mechanism (15), the upper end of one of the second bidirectional threaded rods (14) is rotatably passed through the cross plate (1) and is coaxially fixedly connected with a second rotating handle (16), the outer surfaces of the two second bidirectional threaded rods (14) are threadedly sleeved with lifting blocks (17), the two lifting blocks (17) are respectively slidably connected to the inner side walls of the two through holes (13), and the two ends of the two tensioning sprockets (4) are respectively rotatably connected to the four lifting blocks (17).

6. A chain tensioning device according to claim 5, characterized in that: The second transmission mechanism (15) comprises two second pulleys (18), the two second pulleys (18) are respectively coaxially fixedly connected to two second bidirectional threaded rods (14), and the two second pulleys (18) are connected via a synchronous belt transmission.

7. A chain tensioning device according to claim 5, characterized in that: The two lifting blocks (17) located outside the same second bidirectional threaded rod (14) are both provided with threaded holes matching the second bidirectional threaded rod (14), and the threads in the two threaded holes have opposite rotation directions.

8. A chain tensioning device according to claim 5, characterized in that: The second bidirectional threaded rod (14) is externally threadedly sleeved with four fastening nuts (19), the four fastening nuts (19) are located between the two lifting blocks (17), and the four fastening nuts (19) correspond to the two lifting blocks (17).

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