Anti-loosening engine belt pulley connecting structure

Abstract

The utility model relates to the technical field of engine transmission structures, in particular to an anti-loosening engine belt pulley connecting structure. According to the technical scheme, the device comprises a clamping ring plate, a device groove is formed in the clamping ring plate, three sets of movable grooves in a circumferential array are formed in the outer side of the clamping ring plate, three sets of abutting plates are arranged in the device groove, connecting rods are fixedly connected to the interiors of the three sets of abutting plates, and the connecting rods are rotationally connected with the device groove; reset mechanisms are arranged on the peripheries of the three sets of abutting plates. The abutting plate is driven by centrifugal force to lock the belt pulley in a self-adaptive mode, the clamping ring plate and the abutting plate form a centrifugal response assembly, the axial pressing force is automatically enhanced along with increase of the rotating speed of the main shaft, and the rotating speed self-adaptive wedge-shaped clamping effect is formed; the reset mechanism ensures lossless decoupling in a shutdown state through an energy storage release circulation function, and the structure converts centrifugal potential energy into a dynamic self-locking load, so that the automation degree of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine transmission structure technology, and in particular to an engine pulley connection structure that prevents loosening. Background Technology

[0002] Engine pulleys are core components of the power transmission system in automobiles and industrial equipment. They are mainly used to transmit the rotational power of the crankshaft to accessories such as water pumps, generators, and air conditioning compressors via belts. When installing existing pulleys, traditional pulleys are mostly fixed by keyway fit or flange bolts.

[0003] However, under long-term alternating loads, pulleys are prone to axial displacement and radial fretting wear. Especially under high-frequency vibration, thermal expansion and impact load conditions, existing structures generally suffer from bolt preload attenuation, which leads to a clearance between the pulley and the shaft end. Therefore, this application proposes an anti-loosening engine pulley connection structure. Utility Model Content

[0004] The purpose of this invention is to address the problem of pulley displacement in the prior art by proposing an engine pulley connection structure that prevents loosening.

[0005] The technical solution of this utility model is as follows: an anti-loosening engine pulley connection structure, including a snap-fit ​​ring plate, a device groove inside the snap-fit ​​ring plate, and three sets of circumferentially arrayed movable grooves outside the snap-fit ​​ring plate. Three sets of abutment plates are arranged inside the device groove, and a connecting rod is fixedly connected inside each of the three sets of abutment plates. The connecting rod is rotatably connected to the device groove. A reset mechanism is arranged around each of the three sets of abutment plates. The reset mechanism is used to drive the abutment plates to swing and reset.

[0006] Optionally, the reset mechanism includes a locking rod and a spring. The locking rod is fixedly connected to the device groove, and the spring is sleeved on the outer side of the locking rod. The end of the spring away from the locking rod is fixedly connected to the contact plate.

[0007] Optionally, the outer periphery of the snap ring plate is provided with an external threaded ring, which is fixedly connected to the snap ring plate. An internal threaded ring is threadedly connected to the outer side of the external threaded ring. A protective mechanism that mates with the internal threaded ring is provided at one end of the snap ring plate near the internal threaded ring. When the internal threaded ring moves, it causes the protective mechanism to form a protrusion.

[0008] Optionally, the protective mechanism includes an inclined block, a sliding groove, a fixed plate, a clamping plate, and a second spring. The sliding groove is located at one end of the clamping ring plate near the internal threaded ring. The inclined block slides inside the sliding groove. The fixed plate is fixed to one end of the clamping ring plate near the internal threaded ring. The clamping plate is fixed to one end of the inclined block away from the external threaded ring. The two ends of the second spring are fixed to the inclined block and the fixed plate, respectively.

[0009] Optionally, the protective mechanism is provided in three sets, which are arranged in a circumferential array at one end of the snap ring plate near the internal threaded ring.

[0010] Optionally, a friction pad is glued to the outside of the contact plate, and the friction pad is made of rubber.

[0011] Optionally, a retaining ring is fixed to one end of the snap ring plate away from the external threaded ring, and the diameter of the retaining ring is larger than the diameter of the snap ring plate.

[0012] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0013] This invention uses centrifugal force to drive the contact plate to adaptively lock the pulley. The locking ring plate and the contact plate form a centrifugal response component, which automatically increases the axial clamping force as the spindle speed increases, forming a speed-adaptive wedge clamping effect. The reset mechanism ensures non-destructive decoupling in the shutdown state through the energy storage and release cycle function. This structure converts centrifugal potential energy into dynamic self-locking load, improving the automation level of the device.

[0014] Furthermore, through the synergistic effect of the threaded linkage and the protective mechanism, an anti-disengagement protection mechanism is formed. The external threaded ring and the internal threaded ring constitute a helical transmission assembly, which triggers the protective mechanism to form a protrusion, forming a mechanical limit barrier, blocking the reset path of the pulley, and improving the stability of the pulley during rotation. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of an anti-loosening engine pulley connection structure;

[0016] Figure 2 A cross-sectional schematic diagram of an anti-loosening engine pulley connection structure;

[0017] Figure 3 for Figure 2 A magnified structural diagram at point A;

[0018] Figure 4 This is a schematic diagram of a localized explosion.

[0019] Figure 5 This is a schematic diagram of the inclined block and spring two.

[0020] Figure 6 This is a schematic diagram of the explosion of the inclined block.

[0021] Reference numerals in the attached drawings: 2. Snap-fit ​​ring plate; 3. Device groove; 4. Movable groove; 5. Abutment plate; 6. Connecting rod; 7. Clamping rod; 8. Spring one; 9. External threaded ring; 10. Internal threaded ring; 11. Inclined block; 12. Slide groove; 13. Fixing plate; 14. Clamping plate; 15. Spring two; 16. Friction pad; 17. Retaining ring. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Example

[0024] like Figures 1-4 As shown, the present invention proposes an anti-loosening engine pulley connection structure, including a snap-fit ​​ring plate 2. First, the snap-fit ​​ring plate 2 is fixed to the main shaft of the engine power using any commercially available installation method, such as welding or flange bolts. It should be noted that the engine main shaft in this embodiment is existing technology and is mature, so it will not be elaborated further. Then, the pulley is fitted onto the outside of the snap-fit ​​ring plate 2 through a keyway connection, thereby achieving the purpose of fixing the pulley.

[0025] Among them, such as Figure 2 and Figure 3 As shown, the snap-fit ​​ring plate 2 has a device groove 3 inside, and three sets of circumferentially arrayed movable grooves 4 are formed on the outer side of the snap-fit ​​ring plate 2. Three sets of abutment plates 5 are arranged inside the device groove 3, and connecting rods 6 are fixedly connected to the interior of each of the three sets of abutment plates 5. The connecting rods 6 are rotatably connected to the device groove 3. When the main shaft rotates, it drives the snap-fit ​​ring plate 2 to rotate. The rotation of the snap-fit ​​ring plate 2 generates centrifugal force. Under the action of centrifugal force, the snap-fit ​​ring plate 2 drives the abutment plates 5 to rotate around the connecting rods 6. The spindle rotates outwards towards the locking ring plate 2. This can be understood by referring to the working principle of centrifugal force. When the contact plate 5 rotates outwards towards the locking ring plate 2, it will pass over the movable groove 4 and apply pressure to the pulley on the outer side of the locking ring plate 2, thus achieving the function of auxiliary fixing. Furthermore, the higher the spindle speed, the greater the centrifugal force, and the automatic increase in the interference fit between the contact plate 5 and the pulley, forming a dynamic self-locking effect of "the higher the speed, the tighter the fit," effectively preventing the pulley from falling off during rotation.

[0026] In addition, such as Figure 2 and Figure 3 As shown, a reset mechanism is provided around the periphery of each of the three sets of contact plates 5. The reset mechanism is used to drive the contact plate 5 to swing and reset. When the contact plate 5 swings, it will drive the reset mechanism to run, so that the reset mechanism is in an energy storage state. When the main shaft stops rotating, the reset mechanism will release potential energy and pull the contact plate 5 to swing back and reset, thereby facilitating the disassembly and maintenance of the pulley.

[0027] It should be noted that, as Figure 3 As shown, the reset mechanism includes a latch 7 and a spring 8. The reset mechanism is described in detail below:

[0028] The locking rod 7 is fixedly connected to the device groove 3. A spring 8 is sleeved on the outer side of the locking rod 7. The end of the spring 8 away from the locking rod 7 is fixedly connected to the contact plate 5. When the contact plate 5 swings, it will cooperate with the locking rod 7 to pull the spring 8, causing the spring 8 to deform and generate elastic potential energy. After the centrifugal swing of the contact plate 5 ends, the spring 8 will release the elastic potential energy and pull the contact plate 5 to swing back and reset.

[0029] Furthermore, such as Figure 5 and Figure 6 As shown, an external threaded ring 9 is provided on the periphery of the snap ring plate 2. The external threaded ring 9 is fixedly connected to the snap ring plate 2. An internal threaded ring 10 is threadedly connected to the outer side of the external threaded ring 9. When the internal threaded ring 10 is rotated, it can move along the outer side of the external threaded ring 9. A protective mechanism that cooperates with the internal threaded ring 10 is provided at one end of the snap ring plate 2 near the internal threaded ring 10. When the internal threaded ring 10 moves, it causes the protective mechanism to form a protrusion. After the internal threaded ring 10 moves a certain distance, it will trigger the protective mechanism to operate. When the protective mechanism is in operation, it will be in a protruding state. At this time, the protective mechanism will block the pulley from the path outside the snap ring plate 2, thereby preventing the pulley from falling off during rotation.

[0030] Among them, such as Figure 5 and Figure 6 As shown, the protective mechanism includes an inclined block 11, a sliding groove 12, a fixing plate 13, a locking plate 14, and a spring 15. The protective mechanism is described in detail below:

[0031] The groove 12 is formed at the end of the snap ring plate 2 near the internal threaded ring 10. The inclined block 11 slides inside the groove 12. After the internal threaded ring 10 moves a certain distance toward the inclined block 11, it will press against the inclined surface of the inclined block 11. The inclined block 11, under pressure, will move along the outside of the groove 12. The fixing plate 13 is fixed to the end of the snap ring plate 2 near the internal threaded ring 10, and the clamping plate 14 is fixed to the end of the inclined block 11 away from the external threaded ring 9. The movement of the inclined block 11 will drive the clamping plate 14 to move, thereby moving the pulley. The reset path is blocked. The two ends of the second spring 15 are fixed to the inclined block 11 and the fixed plate 13 respectively. When the inclined block 11 moves, it will also cooperate with the fixed plate 13 to squeeze the second spring 15, causing the second spring 15 to deform and generate elastic potential energy. When it is necessary to stop the blocking of the pulley by the clamping plate 14, it is only necessary to rotate the internal thread ring 10 in the opposite direction. The internal thread ring 10 will stop blocking the inclined block 11, and the second spring 15 will release elastic potential energy, thereby pushing the inclined block 11 to reset. The reset of the inclined block 11 will then drive the clamping plate 14 to reset and stop the blocking.

[0032] In addition, such as Figure 1 , Figure 5 and Figure 6 As shown, the protective mechanism is provided in three sets, which are arranged in a circumferential array at one end of the snap ring plate 2 near the internal threaded ring 10. The three sets of protective mechanisms can block the pulley from different positions, resulting in better blocking effect. Furthermore, if one set of protective mechanisms is damaged, it will not affect the normal operation of the equipment.

[0033] Furthermore, such as Figure 3 and Figure 4 As shown, a friction pad 16 is glued to the outside of the contact plate 5. The friction pad 16 is made of rubber. The friction pad 16 can increase the friction between the contact plate 5 and the pulley, making it more secure.

[0034] In addition, such as Figure 4 As shown, a retaining ring 17 is fixed to one end of the snap ring plate 2 away from the external threaded ring 9. The diameter of the retaining ring 17 is larger than the diameter of the snap ring plate 2. The retaining ring 17 can block the end of the pulley away from the snap plate 14. At this time, both ends of the pulley are blocked, thus making the rotation more stable.

[0035] In this embodiment, the snap ring plate 2 is first fixed on the main shaft of the engine power unit. Then, the pulley is connected by a keyway and sleeved on the outside of the snap ring plate 2. When the main shaft rotates, it drives the snap ring plate 2 to rotate. The rotation of the snap ring plate 2 generates centrifugal force. Under the action of centrifugal force, the snap ring plate 2 will drive the contact plate 5 to swing outward about the connecting rod 6. At this time, when the contact plate 5 swings outward about the snap ring plate 2, it will pass over the movable groove 4 and apply pressure to the pulley on the outside of the snap ring plate 2, thereby achieving the function of auxiliary fixation. When the contact plate 5 swings, it will cooperate with the snap rod 7 to pull the spring 8, causing the spring 8 to deform and generate elastic potential energy. After the centrifugal swing of the contact plate 5 ends, the spring 8 will release the elastic potential energy and pull the contact plate 5 to swing back and reset.

[0036] When the internal threaded ring 10 is rotated, it can move along the outside of the external threaded ring 9. After moving a certain distance toward the inclined block 11, the internal threaded ring 10 will press the inclined surface of the inclined block 11. The inclined block 11 will move along the outside of the slide groove 12 under force. The movement of the inclined block 11 will drive the clamping plate 14 to move, thereby blocking the reset path of the pulley. When the inclined block 11 moves, it will also cooperate with the fixing plate 13 to compress the second spring 15, causing the second spring 15 to deform and generate elastic potential energy. When it is necessary to stop the clamping plate 14 from blocking the pulley, simply rotate the internal threaded ring 10 in the opposite direction. The internal threaded ring 10 will stop blocking the inclined block 11, and the second spring 15 will release its elastic potential energy, thereby pushing the inclined block 11 to reset. The reset of the inclined block 11 will then drive the clamping plate 14 to reset and stop blocking.

[0037] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A non-loosening engine pulley connection structure, characterized in that: The device includes a snap ring plate (2), which has a device groove (3) inside and three sets of circumferentially arrayed movable grooves (4) on the outside. The device groove (3) has three sets of abutment plates (5) inside. Each of the three sets of abutment plates (5) is fixedly connected to a connecting rod (6), which is rotatably connected to the device groove (3). Each of the three sets of abutment plates (5) has a reset mechanism on its periphery, which is used to drive the abutment plates (5) to swing and then reset.

2. The anti-loosening engine pulley connection structure according to claim 1, characterized in that, The reset mechanism includes a locking rod (7) and a spring (8). The locking rod (7) is fixedly connected to the device groove (3). The spring (8) is sleeved on the outside of the locking rod (7). The end of the spring (8) away from the locking rod (7) is fixedly connected to the contact plate (5).

3. The anti-loosening engine pulley connection structure according to claim 1, characterized in that, The outer periphery of the snap ring plate (2) is provided with an external threaded ring (9), which is fixedly connected to the snap ring plate (2). An internal threaded ring (10) is threadedly connected to the outer side of the external threaded ring (9). A protective mechanism that cooperates with the internal threaded ring (10) is provided at one end of the snap ring plate (2) near the internal threaded ring (10). When the internal threaded ring (10) moves, it drives the protective mechanism to form a protrusion.

4. The anti-loosening engine pulley connection structure according to claim 3, characterized in that, The protective mechanism includes a wedge (11), a slide (12), a fixing plate (13), a clamping plate (14), and a second spring (15). The slide (12) is located at one end of the snap ring plate (2) near the inner threaded ring (10). The wedge (11) slides inside the slide (12). The fixing plate (13) is fixed to one end of the snap ring plate (2) near the inner threaded ring (10). The clamping plate (14) is fixed to one end of the wedge (11) away from the outer threaded ring (9). The two ends of the second spring (15) are fixed to the wedge (11) and the fixing plate (13), respectively.

5. The anti-loosening engine pulley connection structure according to claim 4, characterized in that, The protective mechanism is provided in three sets, which are arranged in a circular array at one end of the snap ring plate (2) near the internal threaded ring (10).

6. The anti-loosening engine pulley connection structure according to claim 1, characterized in that, The outer side of the contact plate (5) is glued with a friction pad (16), which is made of rubber.

7. The anti-loosening engine pulley connection structure according to claim 1, characterized in that, A retaining ring (17) is fixed to one end of the snap ring plate (2) away from the external threaded ring (9), and the diameter of the retaining ring (17) is larger than the diameter of the snap ring plate (2).

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