Looseness-adjustable crankshaft pulley assembly

Abstract

The utility model discloses a looseness-adjustable crankshaft pulley assembly, which particularly relates to the technical field of automobile parts and comprises a fixing plate, a first belt pulley and a second belt pulley are rotatably mounted on one side of the fixing plate, a transmission belt is sleeved on the first belt pulley and the second belt pulley, and an adjusting mechanism is mounted between the first belt pulley and the second belt pulley. A positioning mechanism is installed at one end of the adjusting mechanism and used for adjusting the tightness of the transmission belt between the first belt wheel and the second belt wheel, and the positioning mechanism is used for limiting the state of the adjusting mechanism. By rotating the adjusting mechanism, the tightness degree of the transmission belt between the belt wheel I and the belt wheel II can be adjusted, so that the purpose of fastening the belt when the tightness degree of the belt is slightly changed is achieved, and when the transmission belt needs to be replaced, the belt can be replaced by rotating the adjusting mechanism. And the belt wheel can be easily detached from the belt wheel I and the belt wheel II.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a loose and adjustable crankshaft pulley assembly. Background Art

[0002] Patent announcement number CN207880022U discloses a crankshaft pulley assembly, including a pulley, a friction plate 1, a shock-absorbing rubber, a wheel hub, a friction plate 2 and a signal disk, wherein the pulley and the wheel hub are connected by the shock-absorbing rubber; a signal disk is pressed on the pulley hub, and the signal disk is provided with missing teeth, and the signal disk with missing teeth rotates synchronously with the crankshaft to provide a speed signal for the engine; a friction plate 1 and a friction plate 2 are installed between the pulley and the signal disk, and the friction plate 1 and the friction plate 2 are installed on the pulley and the signal disk respectively. The utility model can reduce the torsion angle of the engine crankshaft, can read the engine speed, allow a large angular displacement between the pulley and the wheel hub, and can make the belt output more stable; it has the advantages of simple structure and high product integration, and can also reduce the problem of fluctuation in the output speed of the pulley.

[0003] After the belt is installed on the crankshaft pulley, it needs to be tightened by a tensioner to prevent the belt from falling off the crankshaft pulley. The position of the tensioner is generally fixed. After the crankshaft pulley is used for a long time, the tightness of the belt itself will change slightly. At this time, if the tensioner is disassembled and adjusted for the slight change, the process is too cumbersome and complicated. A loose and adjustable crankshaft pulley assembly is proposed to tighten the belt when the tightness of the belt changes slightly. Utility Model Content

[0004] The utility model aims to provide a crankshaft pulley assembly with adjustable looseness.

[0005] The technical problem solved by the utility model is to solve the problem of tightening a belt when the tightness of the belt itself changes slightly.

[0006] The utility model can be implemented through the following technical scheme: a loose and adjustable crankshaft pulley assembly, including a fixed plate, one side of the fixed plate is rotatably mounted with pulley one and pulley two, a transmission belt is sleeved on pulley one and pulley two, an adjustment mechanism is installed between pulley one and pulley two, a positioning mechanism is installed at one end of the adjustment mechanism, the adjustment mechanism is used to adjust the tightness of the transmission belt between pulley one and pulley two, the positioning mechanism is used to limit the state of the adjustment mechanism, the adjustment mechanism is rotated to adjust the tightness of the transmission belt, and then the state of the adjustment mechanism is limited to a state of tightening or relaxing the transmission belt through the positioning mechanism.

[0007] The further technical improvement of the utility model is that the adjusting mechanism includes a first rotating rod rotatably installed on one side of the fixed plate, and a second rotating rod is symmetrically arranged on one side of the fixed plate with the first rotating rod as the center, and a first connecting rod is fixedly installed on the outer peripheral wall of the first rotating rod, and a second connecting rod is fixedly installed on the outer peripheral wall of the second rotating rod, and the two ends of the first connecting rod are respectively slidably connected to the two second connecting rods, and the top and bottom of one end of the second rotating rod are respectively rotatably installed with an outer wheel and an inner wheel, and the first rotating rod is rotated to drive the first connecting rod to drive the two second connecting rods to rotate, and the second connecting rod drives the second rotating rod to rotate, and the rotation of the second rotating rod drives the outer wheel and the inner wheel to respectively fit the outer wall and the inner wall of the transmission belt to squeeze and tighten the transmission belt, and vice versa, the transmission belt is relaxed between the first pulley and the second pulley.

[0008] Furthermore, the outer peripheral wall of the inner wheel is provided with a belt groove matched with the inner wall of the transmission belt, and the belt groove of the inner wheel can limit the movement track of the transmission belt so that it will not slip on the adjustment mechanism.

[0009] Furthermore, the positioning mechanism includes a first pressure plate fixedly connected to one end of the first rotating rod, a pull handle is slidably arranged on the first pressure plate, a second pressure plate is fixedly installed on the pull handle, a plurality of springs are fixedly installed between the first pressure plate and the second pressure plate, positioning plates are fixedly installed at both ends of the pull handle, a plurality of positioning grooves are opened on a side of the fixed plate adjacent to the positioning mechanism, and positioning the positioning plate in the positioning groove can limit the rotation of the adjusting mechanism.

[0010] Furthermore, the shape of the handle is set to be a U-shaped rod, which facilitates the two ends of the handle to be restricted in the positioning groove to restrict the adjustment mechanism.

[0011] Furthermore, the circumference surrounded by the plurality of positioning grooves matches the trajectory of movement of the two ends of the handle when the handle rotates, so that the two ends of the handle can be accurately positioned in the positioning grooves after the handle rotates.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model adjusts the tightness of the transmission belt between the first pulley and the second pulley by rotating the adjusting mechanism, thereby achieving the purpose of tightening the belt when the tightness of the belt itself changes slightly, and when the transmission belt needs to be replaced, it can be easily removed from the first pulley and the second pulley by rotating the adjusting mechanism.

[0014] 2. The utility model sets a positioning mechanism and positions the positioning plates at both ends of the pull handle into the positioning grooves, thereby limiting the rotation of the adjustment mechanism so that the adjustment mechanism will not vibrate when the transmission belt is pulled in the adjustment mechanism, thereby avoiding the shaking of the belt on the adjustment mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0017] Figure 2 It is a structural front view of the utility model;

[0018] Figure 3 This is a disassembled diagram of the adjustment mechanism and positioning mechanism of the utility model.

[0019] In the figure: 1. fixed plate; 2. pulley 1; 3. pulley 2; 4. transmission belt;

[0020] 5. Adjustment mechanism; 51. First rotating rod; 52. Second rotating rod; 53. First connecting rod; 54. Second connecting rod; 55. Outer wheel; 56. Inner wheel;

[0021] 6. Positioning mechanism; 61. First pressing plate; 62. Pull handle; 63. Second pressing plate; 64. Spring; 65. Positioning plate; 66. Positioning groove. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0023] See also Figure 1-3 As shown, this embodiment provides a loose and adjustable crankshaft pulley assembly, including a fixed plate 1, a pulley 2 and a pulley 3 are rotatably mounted on one side of the fixed plate 1, a transmission belt 4 is sleeved between the pulley 2 and the pulley 3, an engine (not shown in the figure) for driving the pulley 2 is mounted on one side of the fixed plate 1, an adjustment mechanism 5 is mounted between the pulley 2 and the pulley 3, a positioning mechanism 6 is mounted on one end of the adjustment mechanism 5, and the power of the engine driving the pulley 2 to rotate is transmitted to the pulley 2 3 through the transmission belt 4, so that the system installed on the pulley 2 3 can operate, and the system can be a generator, a cooling fan, an air conditioning compressor, etc.;

[0024] The adjustment mechanism 5 includes a first rotating rod 51 rotatably mounted on one side of the fixed plate 1, a second rotating rod 52 is rotatably mounted on one side of the fixed plate 1 with the first rotating rod 51 as the center, a first connecting rod 53 is fixedly mounted on the outer peripheral wall of the first rotating rod 51, a second connecting rod 54 is fixedly mounted on the outer peripheral wall of the second rotating rod 52, two ends of the first connecting rod 53 are respectively slidably connected with two second connecting rods 54, an outer wheel 55 and an inner wheel 56 are rotatably mounted on the top and bottom of one end of the second rotating rod 52 away from the fixed plate 1, and a belt groove is provided on the outer peripheral wall of the inner wheel 56;

[0025] The first rotating rod 51 drives the second connecting rod 54 through the first connecting rod 53 to rotate the second rotating rod 52. The rotating second rotating rod 52 changes the deflection angle between the outer wheel 55 and the inner wheel 56. When the transmission belt 4 is arranged between the outer wheel 55 and the inner wheel 56, the transmission belt 4 is affected by the deflection angle, so that the outer side of the transmission belt 4 is attached to the outer wheel 55 and the inner side is attached to the inner wheel 56. By adjusting the deflection angle between the outer wheel 55 and the inner wheel 56, the looseness of the transmission belt 4 on the pulley 1 2 and the pulley 2 3 can be adjusted.

[0026] The positioning mechanism 6 includes a first pressure plate 61 fixedly installed at one end of the first rotating rod 51 away from the fixed plate 1, a pull handle 62 is slidably provided on the first pressure plate 61, and the pull handle 62 is shaped as a U-shaped rod, a second pressure plate 63 is fixedly installed on the pull handle 62, a plurality of springs 64 are fixedly installed between the first pressure plate 61 and the second pressure plate 63, and positioning plates 65 are fixedly installed at both ends of the pull handle 62. A plurality of positioning grooves 66 adapted to the positioning plate 65 are provided on one side of the fixed plate 1 adjacent to the positioning mechanism 6, and the circumference surrounded by the plurality of positioning grooves 66 is adapted to the trajectory of movement of the two ends of the pull handle 62 when the pull handle 62 rotates;

[0027] Pulling the handle 62 drives the second pressure plate 63 to squeeze the spring 64 in the direction of the first pressure plate 61. At this time, the spring 64 is in a stressed state, and the positioning plates 65 at both ends of the handle 62 are disengaged from the positioning grooves 66. Then the handle 62 is rotated to drive the first rotating rod 51 to rotate until the tightness of the transmission belt 4 is adjusted. Then the handle 62 is released. At this time, the stressed state of the spring 64 is released, and the spring 64 squeezes the second pressure plate 63 to drive the positioning plates 65 at both ends of the handle 62 to be positioned in the other two positioning grooves 66, thereby limiting the adjustment mechanism 5.

[0028] When the utility model is in use, the transmission belt 4 is sleeved on the pulley 1 2 and the pulley 2 3, and the upper section and the lower section of the transmission belt 4 are respectively inserted between the two groups of outer wheels 55 and the inner wheels 56, and then the pull handle 62 is pulled out from the pair of positioning grooves 66 at both ends of the pull handle 62, and then the pull handle 62 is rotated to drive the two groups of outer wheels 55 and the inner wheels 56 to tighten the two ends of the transmission belt 4 respectively, so that the tension state of the transmission belt 4 between the pulley 1 2 and the pulley 2 3 reaches a suitable state, and then the pull handle 62 is released, and the pull handle 62 automatically bounces into another pair of positioning grooves 66, limiting the state of the two groups of outer wheels 55 and the inner wheels 56, and then the two groups of outer wheels 55 and the inner wheels 56 tighten the transmission belt 4, which can loosen the transmission belt 4 between the pulley 1 2 and the pulley 2 3, thereby achieving the purpose of adjustable looseness of the transmission belt 4, so that the installation and disassembly of the transmission belt 4 becomes convenient.

[0029] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A loose and adjustable crankshaft pulley assembly, comprising a fixing plate (1), characterized in that: A pulley 1 (2) and a pulley 2 (3) are rotatably mounted on one side of the fixing plate (1); a transmission belt (4) is sleeved on the pulley 1 (2) and the pulley 2 (3); an adjustment mechanism (5) is mounted between the pulley 1 (2) and the pulley 2 (3); a positioning mechanism (6) is mounted at one end of the adjustment mechanism (5); the adjustment mechanism (5) is used to adjust the tightness of the transmission belt (4) between the pulley 1 (2) and the pulley 2 (3); and the positioning mechanism (6) is used to limit the state of the adjustment mechanism (5); The adjusting mechanism (5) comprises a first rotating rod (51) rotatably mounted on one side of the fixing plate (1); a second rotating rod (52) is rotatably mounted on one side of the fixing plate (1) with the first rotating rod (51) as the center; a first connecting rod (53) is fixedly mounted on the outer peripheral wall of the first rotating rod (51); a second connecting rod (54) is fixedly mounted on the outer peripheral wall of the second rotating rod (52); two ends of the first connecting rod (53) are respectively slidably connected to two second connecting rods (54); and outer wheels are rotatably mounted on the top and bottom of one end of the second rotating rod (52). (55) and an inner wheel (56), the positioning mechanism (6) comprises a first pressure plate (61) fixedly connected to one end of the first rotating rod (51), a pull handle (62) is slidably provided on the first pressure plate (61), a second pressure plate (63) is fixedly installed on the pull handle (62), a plurality of springs (64) are fixedly installed between the first pressure plate (61) and the second pressure plate (63), positioning plates (65) are fixedly installed at both ends of the pull handle (62), and a plurality of positioning grooves (66) are provided on one side of the fixed plate (1) adjacent to the positioning mechanism (6).

2. The looseness-adjustable crankshaft pulley assembly according to claim 1, characterized in that: The outer peripheral wall of the inner wheel (56) is provided with a belt groove which matches the inner wall of the transmission belt (4).

3. The looseness-adjustable crankshaft pulley assembly according to claim 1, characterized in that: The handle (62) is shaped as a U-shaped rod.

4. The looseness-adjustable crankshaft pulley assembly according to claim 1, characterized in that: The circumference formed by the plurality of positioning grooves (66) matches the trajectory of movement of the two ends of the handle (62) when the handle (62) rotates.

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