Tooth-shaped chain and tensioning device thereof

Abstract

The utility model relates to the technical field of tensioning devices, in particular to a tooth-shaped chain and a tensioning device thereof. According to the technical scheme, the tensioning device of the tooth-shaped chain mainly aims at solving the problems that when a chain is loosened, transmission accuracy is lowered, normal operation of a whole transmission system is affected, meanwhile, the chain slides on a chain wheel, excessive abrasion of the chain wheel and the chain is caused, and the service life is shortened. Comprising two groups of positioning chain wheels for supporting the tooth-shaped chain, an adjusting chain wheel and a clamping block, the lifting mechanism is used for limiting when the adjusting chain wheel and the clamping block move, the lifting mechanism comprises an L-shaped mounting plate and a positioning shaft fixedly connected to the side face of the mounting plate, and the adjusting chain wheel is rotationally connected to the positioning shaft. The tensioning degree of the chain body can be freely adjusted, accurate transmission is guaranteed, normal operation of a whole transmission system is maintained, abrasion of the positioning chain wheel and the chain body is reduced, and the service life is prolonged.

Description

Technical Field

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

[0002] A toothed chain is a mechanical transmission device used to transmit power and torque. It consists of a series of gears (or sprockets), and these gears are interconnected by a toothed chain. Toothed chains are widely used in many mechanical systems, such as automotive engines, bicycles, industrial machinery, printing machines, construction machinery and other fields. During the operation of the toothed chain, insufficient tension may cause the chain to become loose. When the chain is slack, it will lead to a decrease in the accuracy of transmission, and even cause the chain to fall off or the teeth to disengage, thus affecting the normal operation of the entire transmission system. At the same time, it causes the chain to slip on the sprocket, resulting in excessive wear of the sprocket and the chain, and shortening their service life. In view of this, the utility model proposes a toothed chain and its tensioning device. Summary of the Utility Model

[0003] The purpose of the utility model is to address the problems in the background art that when the chain is slack, it will lead to a decrease in the accuracy of transmission, affect the normal operation of the entire transmission system, and at the same time cause the chain to slip on the sprocket, resulting in excessive wear of the sprocket and the chain and shortening the service life, and to propose a toothed chain and its tensioning device.

[0004] On the one hand, the utility model proposes a tensioning device for a toothed chain, which includes two groups of positioning sprockets for supporting the toothed chain, and also includes an adjusting sprocket and a clamping block; a lifting mechanism for limiting the movement of the adjusting sprocket and the clamping block, the lifting mechanism includes an L-shaped mounting plate and a positioning shaft fixedly connected to the side of the mounting plate, the adjusting sprocket is rotatably connected to the positioning shaft, and the clamping block is mounted on the mounting plate; an acting component for driving the adjusting sprocket and the clamping block to move to adjust the tension; an adjusting mechanism for driving the acting component to work.

[0005] Optionally, the lifting mechanism further includes a limiting rod, a limiting cylinder, and a backing plate. A plurality of groups of limiting rods are fixedly connected to the side of the mounting plate away from the adjusting sprocket. The outer circle of the limiting rod is slidably sleeved with a limiting cylinder, and the bottom of the limiting cylinder is fixedly connected with a backing plate.

[0006] Optionally, the acting component includes a threaded rod, a threaded sleeve, and a fixing frame. The threaded rod is rotatably connected to the bottom of the mounting plate, the threaded sleeve is threadedly connected to the threaded rod, and fixing frames are fixedly connected to both sides of the threaded sleeve. The two groups of fixing frames are respectively fixedly connected to the two groups of limiting cylinders, and the two groups of fixing frames are symmetrically arranged.

[0007] Optionally, the adjusting mechanism includes a slide rail, a slider, and a moving frame. The two slide rails are respectively fixedly connected to one side of the two limiting cylinders close to the threaded rod. A slider is slidably connected in the slide rail. The slider is connected to the slide rail in a T-shaped structure. The U-shaped moving frame is fixedly connected to the two sliders.

[0008] Optionally, the adjusting mechanism further includes a first rotating sleeve, a rotating rod, a first bevel gear, and a second bevel gear. A first rotating sleeve is arranged in the moving frame. A rotating rod is rotatably connected in the first rotating sleeve. One end of the rotating rod close to the threaded rod is fixedly connected with a first bevel gear. The bottom end of the threaded rod is fixedly connected with a second bevel gear. The first bevel gear meshes with the second bevel gear.

[0009] Optionally, the adjusting mechanism further includes a second rotating sleeve and a synchronous plate. A second rotating sleeve is rotatably connected to the threaded rod. A synchronous plate is fixedly connected to the second rotating sleeve. The L-shaped synchronous plate is fixedly connected to the moving frame.

[0010] On the other hand, the present invention also provides a chain body. The chain body is adjusted and tensioned by the above-mentioned toothed chain tensioning device. The positioning sprocket and the adjusting sprocket are both meshed with the chain body.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] Through the arrangement of the positioning sprocket, the present invention supports the chain body, so that the positioning sprocket drives the chain body to move when rotating to achieve conveying or transmission.

[0013] Furthermore, through the arrangement of the acting component, when the threaded rod rotates, it is threadedly connected with the threaded sleeve. Thus, the threaded rod pushes the mounting plate to move. The mounting plate moves smoothly under the limiting action of the limiting rod and the limiting cylinder, realizing the adjustment of the position of the adjusting sprocket and the clamping block, and thus adjusting the tension of the chain body to ensure the normal operation of the chain body.

[0014] Furthermore, through the arrangement of the adjusting mechanism, when the rotating rod rotates, the first bevel gear meshes with the second bevel gear, avoiding the inconvenience of operation when rotating below the threaded rod and facilitating the adjustment operation.

[0015] In summary, the present invention can freely adjust the tension of the chain body, ensure accurate transmission, maintain the normal operation of the entire transmission system, reduce the wear of the positioning sprocket and the chain body, and increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a toothed chain and its tensioning device is given.

[0017] Figure 2 It is a schematic cross-sectional structure diagram of an adjusting sprocket;

[0018] Figure 3 It is a schematic structure diagram of an acting component;

[0019] Figure 4 It is a schematic disassembled structure diagram of an adjusting mechanism.

[0020] Reference numerals:

[0021] 1. Positioning sprocket; 2. Chain body; 3. Adjusting sprocket; 4. Clamping block;

[0022] 5. Lifting mechanism; 51. Mounting plate; 52. Positioning shaft; 53. Limiting rod; 54. Limiting cylinder; 55. Cushion plate;

[0023] 6. Acting component; 61. Threaded rod; 62. Threaded sleeve; 63. Fixed frame;

[0024] 7. Adjusting mechanism; 71. Slide rail; 72. Slide block; 73. Moving frame; 74. First rotating sleeve; 75. Rotating rod; 76. First bevel gear; 77. Second bevel gear; 78. Second rotating sleeve; 79. Synchronization plate. Detailed implementation manners

[0025] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. 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 present invention to be protected, but only represents the selected embodiments of the present invention.

[0027] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment

[0030] As Figure 1 shown, a tensioning device for a toothed chain proposed by the present utility model includes two groups of positioning sprockets 1 for supporting the toothed chain, and further includes an adjusting sprocket 3 and a clamping block 4. The clamping block 4 is used to position the position of the chain body 2, and the adjusting sprocket 3 and the clamping block 4 adjust the tension of the chain body 2 when moving.

[0031] Further, please refer to Figures 2 - 4 , the above tensioning device includes a lifting mechanism 5 for limiting the movement of the adjusting sprocket 3 and the clamping block 4. The lifting mechanism 5 includes an L-shaped mounting plate 51 and a positioning shaft 52 fixedly connected to the side of the mounting plate 51. The adjusting sprocket 3 is rotatably connected to the positioning shaft 52, so that the adjusting sprocket 3 rotates in place. The clamping block 4 is mounted on the mounting plate 51, and the clamping block 4 moves synchronously with the mounting plate 51. The lifting mechanism 5 further includes a limiting rod 53, a limiting cylinder 54, and a backing plate 55. A plurality of groups of limiting rods 53 are fixedly connected to the side of the mounting plate 51 away from the adjusting sprocket 3. The outer ring of the limiting rod 53 is slidably sleeved with the limiting cylinder 54 for limiting the movement of the mounting plate 51 when moving, so that the movement of the mounting plate 51 is stable. The bottom of the limiting cylinder 54 is fixedly connected with a backing plate 55, and the backing plate 55 can be fixed on the ground by fasteners or welded to the bottom plate, so that the position of the mounting plate 51 is stable.

[0032] Furthermore, the above tensioning device includes an acting component 6 for driving the adjusting sprocket 3 and the clamping block 4 to move to adjust the tension force. The acting component 6 includes a threaded rod 61, a threaded sleeve 62, and a fixing frame 63. The threaded rod 61 is rotatably connected to the bottom of the mounting plate 51, and the threaded rod 61 drives the mounting plate 51 to move when moving. The threaded rod 61 is threadedly connected with the threaded sleeve 62. Both sides of the threaded sleeve 62 are fixedly connected with fixing frames 63, and the two groups of fixing frames 63 are respectively fixedly connected with the two groups of limiting cylinders 54, and the two groups of fixing frames 63 are symmetrically arranged. The position of the threaded sleeve 62 is fixed, so that the threaded rod 61 can move along its own length direction when rotating, that is, it can move up and down.

[0033] Specifically, the above-mentioned tensioning device further includes an adjusting mechanism 7 for driving the acting component 6 to work. The adjusting mechanism 7 includes a slide rail 71, a slider 72, and a moving frame 73. The two groups of slide rails 71 are respectively fixedly connected to one side of the two groups of limiting cylinders 54 close to the threaded rod 61, and the position of the slide rail 71 is fixed. A slider 72 is slidably connected in the slide rail 71. The slider 72 is connected to the slide rail 71 in a T-shaped structure, and the movement of the slider 72 is stable. The U-shaped moving frame 73 is fixedly connected to the two groups of sliders 72, so that the moving frame 73 can move smoothly. The adjusting mechanism 7 further includes a first rotating sleeve 74, a rotating rod 75, a first bevel gear 76, and a second bevel gear 77. A first rotating sleeve 74 is arranged in the moving frame 73, and the first rotating sleeve 74 is fixed in the moving frame 73. A rotating rod 75 is rotatably connected in the first rotating sleeve 74, and the rotating rod 75 rotates in place in the first rotating sleeve 74. One end of the rotating rod 75 close to the threaded rod 61 is fixedly connected with a first bevel gear 76, and the first bevel gear 76 rotates synchronously with the rotating rod 75. The bottom end of the threaded rod 61 is fixedly connected with a second bevel gear 77. The first bevel gear 76 meshes with the second bevel gear 77. When the first bevel gear 76 rotates, it drives the second bevel gear 77 to rotate synchronously, thereby realizing the rotation of the threaded rod 61. The adjusting mechanism 7 further includes a second rotating sleeve 78 and a synchronizing plate 79. A second rotating sleeve 78 is rotatably connected to the threaded rod 61, and the threaded rod 61 rotates in place in the second rotating sleeve 78. Thus, when the threaded rod 61 moves upward, it drives the second rotating sleeve 78 to move upward synchronously. A synchronizing plate 79 is fixedly connected to the second rotating sleeve 78, and the synchronizing plate 79 moves synchronously with the second rotating sleeve 78. The L-shaped synchronizing plate 79 is fixedly connected to the moving frame 73. When the synchronizing plate 79 moves, it drives the moving frame 73 to move. The moving frame 73 slides under the limiting action of the slider 72 and the slide rail 71, so that the first bevel gear 76 and the second bevel gear 77 are always meshed.

[0034] The present utility model further provides a toothed chain, which includes a chain body 2. The tension of the toothed chain is adjusted by using the above-mentioned toothed chain tensioning device. The positioning sprocket 1 and the adjusting sprocket 3 are both meshed with the chain body 2, which is convenient for adjusting the tension of the chain body 2 between the positioning sprockets 1 when the adjusting sprocket 3 moves.

[0035] In this embodiment, a wrench is used to rotate the rotating rod 75. The rotating rod 75 rotates in place in the first rotating sleeve 74, and at the same time drives the first bevel gear 76 to rotate. When the first bevel gear 76 rotates, it meshes with the second bevel gear 77, thereby driving the threaded rod 61 to rotate under the limiting action of the second rotating sleeve 78. Since the threaded rod 61 is threadedly connected to the threaded sleeve 62 and the position of the threaded sleeve 62 is fixed by the fixing bracket 63, the threaded rod 61 can move downward when rotating, and at the same time drives the mounting plate 51 and the second rotating sleeve 78 to move downward simultaneously. At this time, the second rotating sleeve 78 and the synchronization plate 79 move downward synchronously, and at the same time drive the moving frame 73 to move downward. The moving frame 73 moves smoothly under the limiting action of the slide rail 71 and the slider 72. Thus, the first bevel gear 76 and the second bevel gear 77 are always meshed, and the adjustment can be continuously carried out. At the same time, when the mounting plate 51 moves downward, it drives the limiting rod 53 to slide downward in the limiting cylinder 54, so that the movement of the mounting plate 51 is stable. At this time, the adjusting sprocket 3 and the clamping block 4 move downward synchronously, so that the chain body 2 moves downward at the position between the adjusting sprocket 3 and the clamping block 4, thereby adjusting the tension of the chain body 2, ensuring accurate transmission, maintaining the normal operation of the entire transmission system, reducing the wear of the positioning sprocket 1 and the chain body 2, and increasing the service life.

[0036] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A tensioning device for a silent chain, comprising two groups of positioning sprockets (1) for supporting the silent chain, characterized in that, It further includes: an adjusting sprocket (3) and a clamping block (4); a lifting mechanism (5) for limiting the movement of the adjusting sprocket (3) and the clamping block (4). The lifting mechanism (5) includes an L-shaped mounting plate (51) and a positioning shaft (52) fixedly connected to the side of the mounting plate (51). The adjusting sprocket (3) is rotatably connected to the positioning shaft (52), and the clamping block (4) is mounted on the mounting plate (51); an acting component (6) for driving the adjusting sprocket (3) and the clamping block (4) to move to adjust the tension; an adjusting mechanism (7) for driving the acting component (6) to work.

2. The tensioning device for a silent chain according to claim 1, characterized in that, The lifting mechanism (5) further includes a limiting rod (53), a limiting cylinder (54), and a backing plate (55). A plurality of groups of limiting rods (53) are fixedly connected to the side of the mounting plate (51) away from the adjusting sprocket (3). The outer circle of the limiting rod (53) is slidably sleeved with a limiting cylinder (54), and the bottom of the limiting cylinder (54) is fixedly connected with a backing plate (55).

3. The tensioning device for a silent chain according to claim 2, characterized in that, The acting component (6) includes a threaded rod (61), a threaded sleeve (62), and a fixing frame (63). The threaded rod (61) is rotatably connected to the bottom of the mounting plate (51). The threaded sleeve (62) is threadedly connected to the threaded rod (61). Fixing frames (63) are fixedly connected to both sides of the threaded sleeve (62). The two fixing frames (63) are respectively fixedly connected to the two limiting cylinders (54), and the two fixing frames (63) are symmetrically arranged.

4. A tensioning device for a toothed chain according to claim 3, characterized in that, The adjusting mechanism (7) includes a slide rail (71), a slider (72), and a moving frame (73). The two slide rails (71) are respectively fixedly connected to the sides of the two limiting cylinders (54) close to the threaded rod (61). The slider (72) is slidably connected in the slide rail (71). The slider (72) and the slide rail (71) are connected in a T-shaped structure. The U-shaped moving frame (73) is fixedly connected to the two sliders (72).

5. A tensioning device for a toothed chain according to claim 4, characterized in that, The adjusting mechanism (7) further includes a first rotating sleeve (74), a rotating rod (75), a first bevel gear (76), and a second bevel gear (77). A first rotating sleeve (74) is arranged in the moving frame (73). The rotating rod (75) is rotatably connected in the first rotating sleeve (74). A first bevel gear (76) is fixedly connected to the end of the rotating rod (75) close to the threaded rod (61). A second bevel gear (77) is fixedly connected to the bottom end of the threaded rod (61). The first bevel gear (76) meshes with the second bevel gear (77).

6. A tensioning device for a toothed chain according to claim 5, characterized in that, The adjusting mechanism (7) further includes a second rotating sleeve (78) and a synchronizing plate (79). A second rotating sleeve (78) is rotatably connected to the threaded rod (61). The synchronizing plate (79) is fixedly connected to the second rotating sleeve (78). The L-shaped synchronizing plate (79) is fixedly connected to the moving frame (73).

7. A silent chain, characterized in that, It includes a chain body (2). The chain body (2) is adjusted for tension using the toothed chain tensioning device according to any one of claims 1-6. The positioning sprocket (1) and the adjusting sprocket (3) are both engaged with the chain body (2).

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