Chain tensioning mechanism

Abstract

The utility model discloses a chain tensioning mechanism, which relates to the technical field of mechanical equipment and comprises a fixing frame, the outer walls of the front part and the rear part of the fixing frame are fixedly connected with gears I, the opposite sides of the outer walls of the two gears I are meshed with a chain, and the upper surface of the middle part of the fixing frame is fixedly provided with a mounting assembly. Two symmetrical tensioning assemblies are fixedly mounted on the left side and the right side of the mounting assembly, and the inner walls of the two tensioning assemblies are movably connected with the outer walls of the left portion and the right portion of the chain in a sleeving mode correspondingly. According to the chain tensioning mechanism, the two second gears can be installed and fixed to the left side and the right side of the chain through the action of the nuts, the threaded rods, the screws and the installation blocks, then the two second gears continue to move by rotating the nuts, and therefore the two second gears can tension the chain, and the chain tensioning efficiency is improved. And therefore, mounting, fixing and adjusting can be conveniently conducted according to requirements, and the stability of the second gear when the chain is tensioned can be ensured through a limiting plate.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a chain tensioning mechanism. Background Art

[0002] Chain drive is a mechanical transmission that uses the engagement of chain and sprocket teeth to transmit power and motion. The main characteristics of chain drive are: no elastic sliding and slipping, can maintain an accurate average transmission ratio, and have high transmission efficiency (closed chain drive transmission efficiency = 0.95~0.98); the chain does not need to be stretched as tight as a belt, so the axial pressure force is small; it has high power transmission and strong overload capacity; it can work well under low speed and heavy load; it can adapt to harsh environments such as dust, oil, corrosion and high-intensity occasions; in actual use, if the chain tension is too small during the transmission process, chain slippage may occur. Therefore, the chain tension directly affects whether it can operate stably, so a chain tensioning mechanism is needed.

[0003] Chinese patent document CN212959726U discloses a chain tensioning mechanism, including a driven shaft, which is arranged at one end of a bracket, and a U-shaped groove is provided on the side of the bracket corresponding to one end of the driven shaft. Both ends of the driven shaft pass through the U-shaped groove and are adjustable in position within the U-shaped groove. The utility model can adjust the chain tensioning degree by adjusting the position of the transmission shaft, and the adjustment process is time-saving and labor-saving, and has high efficiency. It can avoid the problem of difficult installation of the existing tensioning wheel and has wide applicability.

[0004] The existing technology has the following problems:

[0005] The chain tensioning mechanism is not easy to install when in use, and the tensioning assembly cannot be adjusted well according to the use requirements when in use. In addition, the chain tensioning mechanism cannot play a good protective role when in use, and is prone to damage. Utility Model Content

[0006] The utility model provides a chain tensioning mechanism to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A chain tensioning mechanism includes a fixed frame, the outer walls of the front and rear parts of the fixed frame are fixedly connected to gear one, the opposite sides of the outer walls of the two gear ones are meshed with chains, a mounting assembly is fixedly installed on the upper surface of the middle part of the fixed frame, and two symmetrical tensioning assemblies are fixedly installed on the left and right sides of the mounting assembly, and the inner walls of the two tensioning assemblies are movably connected to the outer walls of the left and right parts of the chain respectively.

[0009] Preferably, the mounting assembly includes a mounting block, the outer wall of the lower part of the mounting block is clamped with the inner wall of the middle part of the fixing frame, the inner cavities of the front and rear parts of the mounting block are threadedly connected with screws, the outer walls of the lower parts of the four screws are respectively threadedly connected with the inner cavity of the fixing frame, the upper and lower parts on the left and right sides of the mounting block are fixedly connected with threaded rods, and the outer walls of the four threaded rods are threadedly connected with nuts.

[0010] Preferably, the two tensioning assemblies include four L-shaped plates, the inner walls of the four L-shaped plates close to the mounting block are movably connected to the outer walls of the four threaded rods respectively, the opposite surfaces of the four L-shaped plates close to the mounting block are overlapped with the side of the four nuts close to the mounting block respectively, the opposite surfaces of the opposite parts of the four L-shaped plates are slidably connected to two U-shaped plates, and the two U-shaped plates are located on the left and right sides of the chain.

[0011] Preferably, one side of the four L-shaped plates close to the mounting block is fixedly connected to a limiting plate, and the outer walls of the four limiting plates are respectively slidably connected to the inner cavity of the mounting block.

[0012] Preferably, the inner walls of the two U-shaped plates are rotatably connected to gear 2, and the opposite surfaces of the outer walls of the two gears 2 are respectively engaged with the left and right sides of the middle part of the chain.

[0013] Preferably, the inner walls of the two L-shaped plates on the same side are slidably connected to a limiting slider, and the opposite surfaces of the two limiting sliders are fixedly connected to the upper and lower sides of the U-shaped plate respectively.

[0014] Preferably, the inner cavity of the limiting slider is movably sleeved with two guide rods, and the left and right sides of the two guide rods are respectively fixedly connected to the inner wall of the L-shaped plate.

[0015] Preferably, the outer walls of the two guide rods are slidably connected with springs, the sides of the two springs close to the mounting block are fixedly connected to the sides of the limiting slider away from the mounting block, and the sides of the two springs away from the limiting slider are fixedly connected to the inner wall of the L-shaped plate.

[0016] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0017] 1. The utility model provides a chain tensioning mechanism, which enables two gears 2 to be installed and fixed to the left and right sides of the chain through the action of nuts, threaded rods, screws and mounting blocks. Then, by rotating the nuts, the positions of the two gears 2 continue to move, so that the two gears 2 can tension the chain, which is convenient for installation, fixing and adjustment according to needs. The limit plate increases the strength between the L-shaped plate and the mounting block and plays a limiting and guiding role, thereby ensuring the stability of the gear 2 when tensioning the chain.

[0018] 2. The utility model provides a chain tensioning mechanism, which, through the action of the guide rod and the spring, allows the limit slider to have a certain buffer space when moving in the inner wall of the L-shaped plate, so that the gear 2 can have a certain buffer when tensioning the chain, thereby providing protection and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the tensioning assembly and the installation assembly of the utility model;

[0023] Figure 5 This is a schematic cross-sectional view of the tensioning assembly of the present invention;

[0024] Figure 6 This is a structural diagram of the limit slider of the utility model.

[0025] In the figure: 1. Fixed bracket; 2. Gear 1; 3. Chain; 4. Mounting assembly; 5. Tensioning assembly; 41. Mounting block; 42. Screw; 43. Threaded rod; 44. Nut; 51. L-shaped plate; 52. Limit plate; 53. U-shaped plate; 54. Gear 2; 55. Limit slider; 56. Guide rod; 57. Spring. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 As shown, a chain tensioning mechanism includes a fixing frame 1, the outer walls of the front and rear portions of the fixing frame 1 are fixedly connected to gears 2, and chains 3 are meshed on opposite sides of the outer walls of the two gears 2. A mounting assembly 4 is fixedly mounted on the upper surface of the middle portion of the fixing frame 1, and two symmetrical tensioning assemblies 5 are fixedly mounted on the left and right sides of the mounting assembly 4. The inner walls of the two tensioning assemblies 5 are movably connected to the outer walls of the left and right portions of the chain 3 respectively.

[0028] First, fix the mounting assembly 4 to the upper surface of the fixing frame 1, then install the two tensioning assemblies 5 to the left and right sides of the mounting assembly 4, and then adjust the positions of the two tensioning assemblies 5 as needed, so that the chain 3 can be tensioned, making it easier for the two gears 2 to drive the chain 3 to rotate.

[0029] like Figure 2 As shown, the mounting assembly 4 includes a mounting block 41. The outer wall of the lower portion of the mounting block 41 is clamped with the inner wall of the middle portion of the fixing frame 1. The inner cavities of the front and rear portions of the mounting block 41 are threadedly connected with screws 42. The outer walls of the lower portions of the four screws 42 are respectively threadedly connected with the inner cavities of the fixing frame 1. The upper and lower portions of the left and right sides of the mounting block 41 are fixedly connected with threaded rods 43. The outer walls of the four threaded rods 43 are threadedly connected with nuts 44.

[0030] By means of the screws 42, the mounting block 41 is fixed to the upper surface of the fixing frame 1, and then the L-shaped plate 51 is passed through the outer wall of the threaded rod 43, so that the side of the gear 2 54 close to the mounting block 41 can engage with the outer wall of the chain 3, and then by rotating the nut 44, the U-shaped plate 53 and the gear 2 54 can be installed to one side of the chain 3 under the action of the two L-shaped plates 51, and then by continuing to rotate the nut 44, the two gears 2 54 can tighten the chain 3, thereby facilitating installation, fixation and adjustment according to needs.

[0031] like Figure 3 As shown, the two tensioning assemblies 5 include four L-shaped plates 51, the inner walls of the four L-shaped plates 51 near the mounting block 41 are movably sleeved with the outer walls of the four threaded rods 43, and the opposite surfaces of the four L-shaped plates 51 near the mounting block 41 are overlapped with the side of the four nuts 44 near the mounting block 41. The opposite surfaces of the opposite parts of the four L-shaped plates 51 are slidably connected to two U-shaped plates 53, and the two U-shaped plates 53 are located on the left and right sides of the chain 3; the inner walls of the two U-shaped plates 53 are rotatably connected to the gear 2 54, and the opposite surfaces of the outer walls of the two gears 54 are respectively engaged with the left and right sides of the middle part of the chain 3;

[0032] Through the action of the two second gears 54, the chain 3 is first restricted while being able to rotate and move normally, thereby not affecting its normal operation.

[0033] like Figure 4 As shown, the four L-shaped plates 51 are fixedly connected to the limiting plates 52 on one side close to the mounting block 41, and the outer walls of the four limiting plates 52 are respectively slidably connected to the inner cavity of the mounting block 41;

[0034] The limiting plate 52 increases the strength between the L-shaped plate 51 and the mounting block 41 while also providing a limiting and guiding function, thereby ensuring the stability of the gear 2 54 when tensioning the chain 3 .

[0035] like Figure 5 As shown, the inner walls of the two L-shaped plates 51 on the same side are slidably connected to the limit sliders 55, and the opposite surfaces of the two limit sliders 55 are fixedly connected to the upper and lower sides of the U-shaped plate 53 respectively;

[0036] Through the action of the two limiting sliders 55 , the U-shaped plate 53 can move left and right between the two L-shaped plates 51 , thereby increasing a certain amount of movement space.

[0037] like Figure 6 As shown, the inner cavity of the limit slider 55 is movably connected to two guide rods 56, and the left and right sides of the two guide rods 56 are respectively fixedly connected to the inner wall of the L-shaped plate 51; the outer walls of the two guide rods 56 are slidably connected to springs 57, and the sides of the two springs 57 close to the mounting block 41 are respectively fixedly connected to the sides of the limit slider 55 away from the mounting block 41, and the sides of the two springs 57 away from the limit slider 55 are respectively fixedly connected to the inner wall of the L-shaped plate 51;

[0038] Through the action of the guide rod 56 and the spring 57, the limit slider 55 can have a certain buffer space when moving in the inner wall of the L-shaped plate 51, so that the gear 2 54 can have a certain buffer when tensioning the chain 3, thereby providing protection and increasing its service life.

[0039] The working principle of the present invention is as follows: first, the mounting block 41 is fixed to the upper surface of the fixing frame 1 by the action of the screw 42, and then the L-shaped plate 51 is passed through the outer wall of the threaded rod 43, so that the side of the gear 2 54 close to the mounting block 41 can engage with the outer wall of the chain 3, and then by rotating the nut 44, the U-shaped plate 53 and the gear 2 54 can be installed to one side of the chain 3 under the action of the two L-shaped plates 51, and the gear 2 54 on the other side is installed at the same time, and then by continuing to rotate the nut 44, the two gears 2 54 can tension the chain 3, wherein the guide rod 56, the limit slider 55 and the spring 57 are used to allow the limit slider 55 to have a certain buffer space when moving in the inner wall of the L-shaped plate 51, so that the gear 2 54 can have a certain buffer when tensioning the chain 3, thereby providing protection.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A chain tensioning mechanism, comprising a fixing frame (1), characterized in that: The outer walls of the front and rear parts of the fixing frame (1) are fixedly connected to a gear (2), and the two opposite sides of the outer walls of the gear (2) are meshed with a chain (3). A mounting assembly (4) is fixedly installed on the upper surface of the middle part of the fixing frame (1), and two symmetrical tensioning assemblies (5) are fixedly installed on the left and right sides of the mounting assembly (4), and the inner walls of the two tensioning assemblies (5) are movably connected to the outer walls of the left and right parts of the chain (3) respectively. The mounting assembly (4) includes a mounting block (41), the outer wall of the lower portion of the mounting block (41) is clamped with the inner wall of the middle portion of the fixing frame (1), the inner cavities of the front and rear portions of the mounting block (41) are threadedly connected with screws (42), the outer walls of the lower portions of the four screws (42) are respectively threadedly connected with the inner cavities of the fixing frame (1), the upper and lower portions of the left and right sides of the mounting block (41) are fixedly connected with threaded rods (43), and the outer walls of the four threaded rods (43) are threadedly connected with nuts (44); The two tensioning assemblies (5) include four L-shaped plates (51), the inner walls of the four L-shaped plates (51) close to the mounting block (41) are respectively movably sleeved with the outer walls of the four threaded rods (43), the opposite surfaces of the four L-shaped plates (51) close to the mounting block (41) are respectively overlapped with the side of the four nuts (44) close to the mounting block (41), and the opposite surfaces of the opposite parts of the four L-shaped plates (51) are slidably connected to two U-shaped plates (53), and the two U-shaped plates (53) are located on the left and right sides of the chain (3).

2. A chain tensioning mechanism according to claim 1, characterized in that: One side of the four L-shaped plates (51) close to the mounting block (41) is fixedly connected to a limiting plate (52), and the outer walls of the four limiting plates (52) are respectively slidably connected to the inner cavity of the mounting block (41).

3. A chain tensioning mechanism according to claim 2, characterized in that: The inner walls of the two U-shaped plates (53) are both rotatably connected to gear 2 (54), and the opposite surfaces of the outer walls of the two gear 2 (54) are respectively engaged with the left and right sides of the middle of the chain (3).

4. A chain tensioning mechanism according to claim 3, characterized in that: The inner walls of the two L-shaped plates (51) on the same side are both slidably connected to a limiting slider (55), and the opposite surfaces of the two limiting sliders (55) are fixedly connected to the upper and lower sides of the U-shaped plate (53) respectively.

5. The chain tensioning mechanism according to claim 4, characterized in that: The inner cavity of the limiting slider (55) is movably sleeved with two guide rods (56), and the left and right sides of the two guide rods (56) are respectively fixedly connected to the inner wall of the L-shaped plate (51).

6. The chain tensioning mechanism according to claim 5, characterized in that: The outer walls of the two guide rods (56) are slidably connected to springs (57), and the sides of the two springs (57) close to the mounting block (41) are fixedly connected to the sides of the limiting slider (55) away from the mounting block (41), and the sides of the two springs (57) away from the limiting slider (55) are fixedly connected to the inner wall of the L-shaped plate (51).

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