Fishbone type tensioning device

Abstract

The utility model discloses a fishbone type tensioning device which is characterized in that the fishbone type tensioning device comprises a fixing unit, a linkage rod unit, an upper wheel rod, a lower wheel rod, a tensioning wheel and a traction unit, and the upper wheel rod and the lower wheel rod are arranged on the two sides of a chain to be tensioned respectively; the upper wheel rod and the lower wheel rod enable the tension wheels in bearing connection with the resistance ends of the upper wheel rod and the lower wheel rod to clamp the chain from the two sides according to the lever principle; fulcrums of the upper wheel rod and the lower wheel rod are hinged to the fixing frame through fixing units; the power end of the upper wheel rod and the power end of the lower wheel rod are both hinged to the linkage rod unit, and the traction unit is arranged on the linkage rod unit. The linkage rod unit is used for pulling the power end of the upper wheel rod and the power end of the lower wheel rod under the action of the pulling unit, so that the tensioning wheels on the two sides of the chain clamp the chain, and the tensioning effect is achieved. The utility model discloses a fishbone type tensioning device in various forms, which is respectively adaptive to different sites, can be adaptive to both narrow sites and spacious sites, and is applicable to various working environments.

Description

Technical Field

[0001] The utility model relates to the field of mechanical transmission, in particular to a herringbone type tensioning device. Background Art

[0002] During mechanical transmission, the chain is prone to loosening. When it is subjected to alternating loads, it will cause considerable impact force and vibration. At this time, the chain needs to be tightened. Generally, the chain is tightened by applying a fixed force to the chain through a tensioning device. Once the assembled tensioning device is fixed and installed, it is difficult to adjust its pre-tightening force; the chain will continue to be in a tense state. This situation will not only affect the life of the chain, but also make the chain here unable to transport loads, which will limit the entire mechanical equipment. Utility Model Content

[0003] In order to solve the problems existing in the background technology, the utility model provides a herringbone tensioning device which can adjust the tensioning force and pass the load.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A herringbone tensioning device: comprising an upper wheel rod, a lower wheel rod, a fixing unit, a linkage rod unit, a tensioning wheel, and a pulling unit, wherein:

[0006] The upper wheel rod and the lower wheel rod are respectively arranged on the upper and lower sides of the chain to be tensioned, and the tensioning wheels whose resistance ends are respectively connected to the tensioning wheels by bearings clamp the chain from both sides through the lever principle;

[0007] The fixing unit hinges the fulcrums of the upper wheel rod and the lower wheel rod to the fixing frame respectively;

[0008] The connecting rod unit is hinged to the power ends of the upper wheel rod and the lower wheel rod;

[0009] The pulling unit is arranged on the connecting rod unit;

[0010] The connecting rod unit is used to pull the power ends of the upper wheel rod and the lower wheel rod under the action of the pulling unit, so that the tensioning wheels on both sides of the chain clamp the chain to achieve the tensioning effect; the force of clamping the chain is changed by adjusting the pulling force of the pulling unit.

[0011] Preferably, the upper wheel rod is the third wheel rod, and the lower wheel rod is the fourth wheel rod;

[0012] The fixing unit comprises a second supporting column and a third supporting column, one end of the second supporting column and the third supporting column are fixedly connected to the fixing frame, and the other end is hinged to the fulcrum of the third wheel rod and the fourth wheel rod respectively.

[0013] Preferably, the fulcrum of the third wheel rod is located at an end of the third wheel rod away from the tensioner wheel, and the power end of the third wheel rod is located in the middle of the third wheel rod;

[0014] The fulcrum of the fourth wheel rod is located in the middle of the fourth wheel rod, and the power end of the fourth wheel rod is located at an end of the fourth wheel rod away from the tensioner wheel;

[0015] It also includes a third damping buffer, which is in contact with the upper end surface of the third wheel rod and is used to reduce the vibration amplitude of the third wheel rod.

[0016] Preferably, the pulling unit comprises a third spring, one end of the third spring is suspended at the bottom of the linkage rod unit, and the other end is fixed.

[0017] Preferably, the pulling unit comprises a third pulling rope and a third weight, and the third pulling rope hoists the third weight at the bottom of the connecting rod unit.

[0018] Preferably, the fixing unit comprises a first mounting rod, a second mounting rod and a first supporting column;

[0019] The first mounting rod and the second mounting rod are respectively located at the upper and lower sides of the chain, and are fixedly connected to the fixing frame through the first supporting column;

[0020] The upper wheel rod is a first wheel rod, and the lower wheel rod is a second wheel rod;

[0021] The fulcrum of the first wheel rod is hinged to the first mounting rod, and the fulcrum of the second wheel rod is hinged to the second mounting rod.

[0022] Preferably, the linkage rod unit comprises a first linkage rod and a second linkage rod, and the number of the first wheel rods and the second wheel rods are four respectively; the first linkage rod is laterally connected in series with the power ends of the four second wheel rods, and the second linkage rod is laterally connected in series with the power ends of the four first wheel rods; the first linkage rod is used to simultaneously control the four second wheel rods to move in the same direction, and the second linkage rod is used to simultaneously control the four first wheel rods to move in the same direction;

[0023] The first fixed pulley and the second fixed pulley are respectively arranged at both ends of the second connecting rod; the first pulling rope fixing point and the second pulling rope fixing point are respectively arranged at both ends of the first connecting rod, and the positions of the first pulling rope fixing point and the second pulling rope fixing point are respectively adapted to the first fixed pulley and the second fixed pulley.

[0024] Preferably, the pulling unit comprises a first pulling rope, a second pulling rope, a first weight and a second weight;

[0025] One end of the first pulling rope is connected to the first pulling rope fixing point, and the other end passes around the first fixed pulley and then hoists the first heavy object;

[0026] One end of the second pulling rope is connected to the second pulling rope fixing point, and the other end passes around the second fixed pulley to hoist the second heavy object;

[0027] The mass of the first weight is the same as the mass of the second weight, and is used to press the tensioner wheel and the chain tightly through the lever principle.

[0028] Preferably, the pulling unit comprises a first pulling rope, a second pulling rope, a first spring and a second spring;

[0029] One end of the first pulling rope is connected to the first pulling rope fixing point, and the other end is passed around the first fixed pulley and then hoisted to one end of the first spring, and the other end of the first spring is fixed;

[0030] One end of the second pulling rope is connected to the second pulling rope fixing point, and the other end is passed around the second fixed pulley and then hoisted to one end of the second spring, and the other end of the second spring is fixed.

[0031] Preferably, it also includes a first damping buffer and a second damping buffer, the first damping buffer is fitted with the upper end surface of the second connecting rod to reduce the vibration amplitude of the second connecting rod, and the second damping buffer is fitted with the lower end surface of the first connecting rod to reduce the vibration amplitude of the first connecting rod.

[0032] Compared with the prior art, the utility model has the following beneficial effects:

[0033] 1. The herringbone tensioning device of the utility model can adjust the strength of the tensioning wheel by adjusting the mass of the heavy object, thereby reducing the wear of the tensioning wheel on the chain and increasing the service life of the entire system.

[0034] 2. The herringbone tensioning device of the utility model can stop tensioning by removing the weight, and then tighten the chain through other equipment at other positions. The load that needs a straight chain to transport can also pass through the chain within the tensioning range of the utility model. It has a wide range of applications and few limitations.

[0035] 3. The utility model discloses various forms of herringbone tensioning devices, which are respectively suitable for narrow and spacious spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view structural schematic diagram of the first embodiment of the utility model;

[0037] Figure 2 It is a right side structural schematic diagram of the first embodiment of the utility model;

[0038] Figure 3 This is a front view structural schematic diagram of the second embodiment of the utility model when it is tightened;

[0039] Figure 4 It is a right side structural schematic diagram of the second embodiment of the utility model when being tightened;

[0040] Figure 5 It is a front view schematic diagram of the second embodiment of the utility model when a load can be allowed to pass through.

[0041] In the figure, 1. the first connecting rod, 2. the first tensioning wheel, 3. the first damping buffer, 4. the first wheel rod, 5. the first support column, 6. the first mounting rod, 7. the second connecting rod, 7-1. the first fixed pulley, 7-2. the second fixed pulley, 8. the second mounting rod, 9-1. the first weight, 9-2. the second weight, 10. the second wheel rod, 11. the second damping buffer, 12. the second tensioning wheel, 13. the third damping buffer, 14. the third wheel rod, 15. the second support column, 16. the third connecting rod, 17. the third weight, 18. the fourth wheel rod, 19. the third support column. DETAILED DESCRIPTION

[0042] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] The fixing frame mentioned in the embodiment is not within the scope of the present invention. The fixing frame is used to fix the whole set of equipment including the present invention to realize the operation of assembly line production.

[0044] Embodiment 1

[0045] When the installation space of the herringbone tensioner is relatively wide, two or more first tensioners 2 are selected to achieve the chain tensioning effect. Figure 1 and Figure 2 In the illustrated embodiment, a herringbone tensioning device of the present invention is shown which is composed of four groups of first tensioning wheels 2 .

[0046] As shown in the figure, the herringbone tensioning device includes: a first connecting rod 1, a first tensioning wheel 2, a first damping buffer 3, a first wheel rod 4, a first support column 5, a first mounting rod 6, a second connecting rod 7, a first fixed pulley 7-1, a second fixed pulley 7-2, a second mounting rod 8, a first weight 9-1, a second weight 9-2, a second wheel rod 10 and a second damping buffer 11; wherein: the first mounting rod 6 is fixed to the fixing frame through a plurality of first support columns 5; the first support column 5 has a certain length, so that the first mounting rod 6 is at a certain distance from the fixing frame. A plurality of parallel first wheel rods 4 are hinged on the first mounting rod 6. In the present embodiment, there are four first wheel rods 4. Specifically, the fixed end of the first wheel rod 4 is hinged to the first mounting rod 6, and the free ends thereof are respectively connected to the first tensioning wheel 2 with bearings; the second connecting rod 7 is arranged in parallel with the first mounting rod 6, and the second connecting rod 7 is respectively hinged to the same positions of the rod bodies of the four parallel first wheel rods 4. When the second connecting rod 7 moves up and down, the four first wheel rods 4 will be driven to move in the same direction at the same time. The upper edge of the second connecting rod 7 is attached to the first damping buffer 3, and the first damping buffer 3 plays a buffering role when the second connecting rod 7 vibrates up and down.

[0047] In this embodiment, similarly, the second mounting rod 8 is also fixedly connected to the fixing frame through multiple first support columns 5. The second mounting rod 8 is parallel to the first mounting rod 6 and in the same vertical plane; the second mounting rod 8 is hinged to multiple parallel second wheel rods 10. In this embodiment, there are four second wheel rods 10. Specifically, the fixed end of the second wheel rod 10 is hinged to the second mounting rod 8, and the free ends thereof are each connected to a first tensioning wheel 2 with a bearing; the first connecting rod 1 is arranged in parallel with the second mounting rod 8. The first connecting rod 1 is hinged to the same position of the rod body of the four parallel second wheel rods 10 respectively. When the first connecting rod 1 moves up and down, it will drive the four second wheel rods 10 to move in the same direction at the same time. The lower edge of the first connecting rod 1 is attached to a second damping buffer 11, which plays a buffering role when the first connecting rod 1 vibrates up and down.

[0048] A first fixed pulley 7-1 and a second fixed pulley 7-2 are provided at both ends of the first connecting rod 1; a first pulling rope fixing point and a second pulling rope fixing point are respectively provided at both ends of the first connecting rod 1; the first pulling rope fixing point and the first fixed pulley 7-1 are adapted to each other, and the second pulling rope fixing point and the second fixed pulley 7-2 are adapted to each other; one end of the first pulling rope is fixed at the first pulling rope fixing point, and the other end passes around the first fixed pulley 7-1 and then hangs down and is connected to the first weight 9-1; one end of the second weight rope is fixed at the second pulling rope fixing point, and the other end passes around the second fixed pulley 7-2 and then hangs down and is connected to the second weight 9-2. Under the action of the first weight 9-1 and the second weight 9-2, the second connecting rod 7 and the first connecting rod 1 move relative to each other, driving the four first wheel rods 4 and the four second wheel rods 10 and a total of eight first tensioning wheels 2 connected thereto to move; the eight first tensioning wheels 2 are distributed on both sides of the chain and connected to the chain gears according to the first wheel rods 4 or the second wheel rods 10 connected thereto; because the gravity is balanced, the eight tensioning wheels will squeeze the chain, and when the chain is loose, the gravity of the weight is transmitted to the chain to straighten the chains at other positions to avoid production accidents.

[0049] The following is the usage process of this embodiment:

[0050] During the chain transmission process, the first weight 9-1 and the second weight 9-2 of appropriate weight are selected to pull the second connecting rod 7 and the first connecting rod 1 to be parallel, and generate a pulling force on the multiple first wheel rods 4 and the second wheel rods 10; the eight first tension wheels 2 interact with the chain from both sides, and this interaction force and the above-mentioned pulling force are balanced, and the weight of the first weight 9-1 and the second weight 9-2 are adjusted so that the chain outside the scope of this embodiment is always in a straight state. When the chain is loose due to various reasons, the chain within the scope of this embodiment will bend under the force of the first tension wheel 2, so that the loose part of the chain remains within the scope of this embodiment, while the chain outside the scope of this embodiment is still in a straight state.

[0051] If other tensioning devices outside the scope of this embodiment are used to straighten the chain within the scope of this embodiment, in this case, if a load needs to pass on the chain and this load must be transported on the straightened chain; this embodiment can also allow this load to pass smoothly.

[0052] For the first weight 9-1 or the second weight 9-2, springs can be used instead to play the same role. Specifically, a first pulling rope is passed around the first fixed pulley 7-1 and then connected to one end of the first spring, and the other end of the first spring is fixed; a second pulling rope is passed around the second fixed pulley 7-1 and then connected to one end of the second spring, and the other end of the second spring is fixed; the first spring and the second spring are used to pull the second connecting rod 7 and the first connecting rod 1 closer to achieve a tensioning effect.

[0053] Embodiment 2

[0054] like Figure 3 and Figure 4 As shown, when the installation position of the herringbone tensioner is relatively narrow, a set of second tensioning wheels 12 is selected to achieve the chain tensioning function.

[0055] The herringbone tensioning device of the second embodiment includes a second tensioning wheel 12, a third damping buffer 13, a third wheel rod 14, a second support column 15, a third connecting rod 16, a third weight 17, a fourth wheel rod 18 and a third support column 19; wherein,

[0056] One end of the second support column 15 is hinged to the fixed end of the third wheel rod 14, and the other end is fixedly connected to the fixing frame; one end of the third support column 19 is hinged to the middle part of the rod body of the fourth wheel rod 18, and the other end is fixedly connected to the fixing frame; the fourth wheel rod 18 is located below the third wheel rod 14;

[0057] The middle part of the fourth wheel rod 18 is hinged by the third support column 19, and its two ends are divided into an active end and a driven end; the driven end is connected to the second tensioner 12 by a bearing; one end of the third linkage rod 16 is hinged to the active end, and the other end of the third linkage rod 16 is hinged to the middle part of the third wheel rod 14;

[0058] The fixed end of the third wheel rod 14 is hinged to the second support column 15 , the middle part can move under the drive of the third linkage rod 16 , and the free end is connected to the second tensioner wheel 12 by a bearing.

[0059] The third linkage rod 16 is also connected to a third weight 17 through a third pulling rope. The third weight 17 pulls the third linkage rod 16 through gravity, and the third linkage rod 16 pulls the third wheel rod 14 and the fourth wheel rod 18 through its two ends; and the two second tensioning wheels 12 on the third wheel rod 14 and the fourth wheel rod 18 are brought close to each other, so that the chain between the two second tensioning wheels 12 is clamped to achieve a tensioning effect; the third damping buffer 13 is in contact with the upper end surface of the moving end of the third wheel rod 14, and is used to play a buffering role when the third wheel rod 14 vibrates up and down.

[0060] The following is the usage process of this embodiment:

[0061] During the chain transmission process, a third weight 17 of appropriate weight is selected to make the two second tension wheels 12 and the chain interact with each other. The chain outside the scope of this embodiment is always in a straight state. When the chain is loose due to various reasons, the chain within the scope of this embodiment will bend under the force of the second tension wheel 12, so that the loose part of the chain remains within the scope of this embodiment, while the chain outside the scope of this embodiment is still in a straight state. Figure 3 shown.

[0062] like Figure 5 As shown, if other tensioning devices outside the scope of this embodiment are used to straighten the chain within the scope of this embodiment, in this case, if a load needs to pass through the chain and this load must be transported on the straightened chain; this embodiment can also allow this load to pass smoothly.

[0063] The third weight 17 in the above two embodiments can be replaced by a spring. Specifically, one end of the third spring is hoisted at the bottom of the linkage rod unit and the other end is fixed. The third spring is used to make the two second tensioning wheels 12 on the third wheel rod 14 and the fourth wheel rod 18 approach each other, so that the chain between the two second tensioning wheels 12 is clamped to achieve a tensioning effect.

Claims

1. A herringbone tensioning device, characterized in that: It includes an upper wheel rod, a lower wheel rod, a fixing unit, a linkage rod unit, a tensioning wheel, and a pulling unit, wherein: The upper wheel rod and the lower wheel rod are respectively arranged on the upper and lower sides of the chain to be tensioned, and the tensioning wheels whose resistance ends are respectively connected to the tensioning wheels by bearings clamp the chain from both sides through the lever principle; The fixing unit hinges the fulcrums of the upper wheel rod and the lower wheel rod to the fixing frame respectively; The connecting rod unit is hinged to the power ends of the upper wheel rod and the lower wheel rod; The pulling unit is arranged on the connecting rod unit; The connecting rod unit is used to pull the power ends of the upper wheel rod and the lower wheel rod under the action of the pulling unit, so that the tensioning wheels on both sides of the chain clamp the chain to achieve the tensioning effect; the force of clamping the chain is changed by adjusting the pulling force of the pulling unit.

2. The herringbone tensioning device according to claim 1, characterized in that: The upper wheel rod is a third wheel rod (14), and the lower wheel rod is a fourth wheel rod (18); The fixing unit comprises a second support column (15) and a third support column (19), one end of the second support column (15) and the third support column (19) are fixedly connected to the fixing frame, and the other end is hinged to the fulcrum of the third wheel rod (14) and the fourth wheel rod (18) respectively.

3. The herringbone tensioning device according to claim 2, characterized in that: The fulcrum of the third wheel rod (14) is located at an end of the third wheel rod (14) away from the tension wheel, and the power end of the third wheel rod (14) is located in the middle of the third wheel rod (14); The fulcrum of the fourth wheel rod (18) is located in the middle of the fourth wheel rod (18), and the power end of the fourth wheel rod (18) is located at an end of the fourth wheel rod (18) away from the tensioner wheel; It also comprises a third damping buffer (13), which is in contact with the upper end surface of the third wheel rod (14) and is used to reduce the vibration amplitude of the third wheel rod (14).

4. The herringbone tensioning device according to claim 3, characterized in that: The pulling unit comprises a third spring, one end of which is suspended at the bottom of the linkage rod unit, and the other end of which is fixed.

5. The herringbone tensioning device according to claim 3, characterized in that: The pulling unit comprises a third pulling rope and a third weight (17), and the third pulling rope suspends the third weight (17) at the bottom of the connecting rod unit.

6. The herringbone tensioning device according to claim 1, characterized in that: The fixing unit comprises a first mounting rod (6), a second mounting rod (8) and a first supporting column (5); The first mounting rod (6) and the second mounting rod (8) are respectively located on the upper and lower sides of the chain, and are fixedly connected to the fixing frame via the first supporting column (5); The upper wheel rod is a first wheel rod (4), and the lower wheel rod is a second wheel rod (10); The fulcrum of the first wheel rod (4) is hinged to the first mounting rod (6), and the fulcrum of the second wheel rod (10) is hinged to the second mounting rod (8).

7. The herringbone tensioning device according to claim 6, characterized in that: The linkage rod unit comprises a first linkage rod (1) and a second linkage rod (7); the number of the first wheel rods (4) and the number of the second wheel rods (10) are four respectively; the first linkage rod (1) is laterally connected in series with the power ends of the four second wheel rods (10), and the second linkage rod (7) is laterally connected in series with the power ends of the four first wheel rods (4); the first linkage rod (1) is used to simultaneously control the four second wheel rods (10) to move in the same direction, and the second linkage rod (7) is used to simultaneously control the four first wheel rods (4) to move in the same direction; A first fixed pulley (7-1) and a second fixed pulley (7-2) are respectively arranged at both ends of the second connecting rod (7); a first pulling rope fixing point and a second pulling rope fixing point are respectively arranged at both ends of the first connecting rod (1), and the positions of the first pulling rope fixing point and the second pulling rope fixing point are respectively adapted to the first fixed pulley (7-1) and the second fixed pulley (7-2).

8. The herringbone tensioning device according to claim 7, characterized in that: The pulling unit comprises a first pulling rope, a second pulling rope, a first weight (9-1) and a second weight (9-2); One end of the first pulling rope is connected to the first pulling rope fixing point, and the other end passes around the first fixed pulley (7-1) and then hoists the first heavy object (9-1); One end of the second pulling rope is connected to the second pulling rope fixing point, and the other end passes around the second fixed pulley (7-2) and then hoists the second heavy object (9-2); The mass of the first weight (9-1) is the same as the mass of the second weight (9-2), and is used to press the tension wheel and the chain tightly through the lever principle.

9. The herringbone tensioning device according to claim 7, characterized in that: The pulling unit includes a first pulling rope, a second pulling rope, a first spring and a second spring; One end of the first pulling rope is connected to the first pulling rope fixing point, and the other end passes around the first fixed pulley (7-1) and then hangs one end of the first spring, and the other end of the first spring is fixed; One end of the second pulling rope is connected to the second pulling rope fixing point, and the other end passes around the second fixed pulley (7-2) and then hoisted to one end of the second spring, and the other end of the second spring is fixed.

10. The herringbone tensioning device according to claim 7, characterized in that: It also comprises a first damping buffer (3) and a second damping buffer (11), wherein the first damping buffer (3) is fitted with the upper end surface of the second connecting rod (7) to reduce the vibration amplitude of the second connecting rod (7), and the second damping buffer (11) is fitted with the lower end surface of the first connecting rod (1) to reduce the vibration amplitude of the first connecting rod (1).

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