CN216279280U - Unidirectional coupling damping belt wheel - Google Patents
Unidirectional coupling damping belt wheel Download PDFInfo
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- CN216279280U CN216279280U CN202122215271.7U CN202122215271U CN216279280U CN 216279280 U CN216279280 U CN 216279280U CN 202122215271 U CN202122215271 U CN 202122215271U CN 216279280 U CN216279280 U CN 216279280U
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Abstract
The utility model discloses a one-way coupling damping belt wheel which comprises a belt wheel, a pivot shaft sleeved in the belt wheel, a first annular bulge fixed at the rear end of the pivot shaft, a clutch device for damping and a support assembly arranged at the front end of the belt wheel, wherein the support assembly consists of a dynamic sealing cover, a pressing plate, a disc spring and a support plate which are sequentially arranged from front to back; the utility model innovatively omits a bearing part, and the support plate, the disc spring, the pressure plate and the dynamic sealing cover jointly form a bearing function part, so that compared with the traditional generator damping belt pulley, the utility model greatly saves the cost on the premise of ensuring the corresponding function of the bearing.
Description
Technical Field
The utility model relates to the technical field of automobile generators, in particular to a one-way coupling damping belt wheel.
Background
The automobile generator is the main power supply of the automobile, and when the engine runs normally, the generator supplies power to the electric equipment and charges the storage battery. Along with the improvement of automobile power demand, the requirement for generator power generation gradually rises, and what bring along with it is that the increase of the inertia of generator, rotational speed are high, can't respond in the twinkling of an eye, easily cause and skid between generator band pulley and the belt, produce noise, vibration scheduling problem.
In order to reduce the vibration amplitude transmitted to the generator rotor by the belt pulley, the front end of the generator rotor is provided with a vibration reduction belt pulley. Most generator damping belt wheels on the market support the rotation of a pivot through a bearing, keep the center position of the shaft fixed and reduce the friction coefficient in the movement process. The bearing is a lightweight part in modern mechanical equipment.
Disclosure of Invention
The utility model aims to provide a one-way coupling damping belt wheel, which is used for reducing the cost of the belt wheel on the premise of realizing the function of a bearing.
The technical scheme adopted by the utility model for solving the problems is as follows:
a one-way coupling damper pulley comprising:
a pulley in which a first circular through hole is provided;
the pivot is sleeved in the first circular through hole, a first annular bulge is fixed at the rear end of the pivot, a second annular bulge is fixed at the front end of the pivot, and the pivot, the first circular through hole and the first annular bulge are coaxial;
the clutch device drives the pivot shaft to rotate along a second rotating direction when the belt pulley rotates around the axis in the second rotating direction; when the pulley rotates in a first direction about the axis, the pivot does not rotate; wherein the first and second directions of rotation are opposite;
a third annular bulge extending inwards is arranged at the rear end of the inner wall of the first circular through hole, the first annular bulge is positioned on the front side of the third annular bulge, the first annular bulge and the third annular bulge are abutted against each other, and the outer side surface of the third annular bulge is in running fit with the inner wall of the first circular through hole;
the front end of the inner wall of the first circular through hole is provided with a supporting component, the supporting component consists of a dynamic sealing cover, a pressing plate, a disc spring and a supporting plate which are sequentially arranged from front to back, a second circular through hole is formed in the supporting component, the second circular through hole sequentially penetrates through the dynamic sealing cover, the pressing plate, the disc spring and the supporting plate, the front end of the pivot is sleeved in the second circular through hole, and the outer side surface of the front end of the pivot is in rotating fit with the inner wall of the second circular through hole;
the size of the cross section of the second annular bulge is larger than that of the cross section of the second circular through hole.
Further specifically, the clutch device includes:
the torsional spring and the annular body are positioned in the first circular through hole, and both the torsional spring and the annular body are sleeved on the outer side surface of the pivot;
when the belt pulley rotates in the second steering direction around the axis, the belt pulley is in interference fit with the torsion spring and drives the torsion spring to rotate in the second steering direction, the torsion spring is in interference fit with the annular body and drives the annular body to rotate in the second steering direction, and the annular body drives the pivot to rotate in the second steering direction.
Further specifically, the annular body and the pivot are coaxial, and the outer side face of the annular body is in running fit with the first circular through hole.
Further specifically, the annular body is located between the support assembly and the second annular bulge, and the front end face of the annular body abuts against the support assembly, and the rear end face of the annular body abuts against the first annular bulge.
Further specifically, an annular bulge is arranged on the rear end face of the annular body, the rear end part of the torsion spring is fixed on the inner wall of the first circular through hole, the front end part of the torsion spring is wound on the outer side face of the annular bulge, and an opening penetrating through the annular bulge is arranged in the annular bulge;
when the torsion spring rotates relative to the annular body along the second rotation direction, the end head of the front end part of the torsion spring can penetrate into the opening.
Further specifically, the end of the front end of the torsion spring is bent inwards.
Further specifically, a first spiral step is arranged on the front end face of the second annular bulge, and a second spiral step is arranged on the rear end face of the annular body;
when the annular body rotates relative to the pivot in a first rotating direction, the spigot of the second spiral step is meshed with the groove of the first spiral step.
Further specifically, the dynamic sealing cover and the outer side surface of the support plate are in sealing connection with the inner wall of the first circular through hole.
Further specifically, the unidirectional coupling damper pulley further includes: and the part of the pivot shaft positioned at the rear side of the second annular bulge is hermetically sleeved in the sealing ring, and the outer side surface of the sealing ring is hermetically connected with the inner wall of the second annular bulge.
Further specifically, a thrust washer is pressed on the annular body, a central hole of the thrust washer is formed, and an inner hole of the thrust washer is in interference fit with the pivot.
The utility model has the following beneficial effects:
the utility model innovatively omits a bearing part, and the support plate, the disc spring, the pressure plate and the dynamic sealing cover jointly form a bearing function part, so that compared with the traditional generator damping belt pulley, the utility model greatly saves the cost on the premise of ensuring the corresponding function of the bearing.
Drawings
FIG. 1 is a cross-sectional view of the internal structure of a one-way coupling damper pulley;
FIG. 2 is an exploded schematic view of a one-way coupling damper pulley;
FIG. 3 is a schematic view of the structure of the pivot;
FIG. 4 is a schematic structural view of a torsion spring;
FIG. 5 is a schematic view of the construction of the annular body;
fig. 6 is a schematic structural view of the dynamic sealing cover.
Wherein: 1-belt pulley, 2-sealing ring, 3-pivot, 310-thread, 320-second annular bulge, 3210-first spiral step, 3220-groove, 4-first annular bulge, 5-torsion spring, 6-annular body, 610-annular bulge, 620-opening, 6210-second spiral step, 6220-spigot, 7-thrust washer, 8-supporting plate, 9-pressing plate, 10-disc spring, 11-dynamic sealing cover, 1110-dynamic sealing cover inner ring, 12-first circular through hole, 13-third annular bulge.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.
If the utility model is described in terms of orientations (e.g., up, down, left, right, front, back, outside, inside, etc.), the orientation involved needs to be defined, for example, "for clarity of presentation of the positions and orientations described within the utility model, with reference to the operator of the instrument, the end proximal to the operator being the proximal end and the end distal to the operator being the distal end. "or defined with reference to the paper surface, the refrigerator depth direction, and the like. Of course, if the positional relationship between the two is defined by cross-reference at the time of the subsequent description, it may not be defined here.
The utility model aims to provide a one-way coupling damping belt wheel to reduce the cost on the premise of realizing the bearing function.
The technical scheme adopted by the utility model is as follows:
a one-way coupling damping belt pulley comprises a belt pulley 1, a pivot shaft 3, a clutch device A and a support assembly B.
The two ends of the pulley 1 are defined, the "front" shown in fig. 1 is the front end of the pulley 1, and the "rear" shown in fig. 1 is the rear end of the pulley 1.
Definitions hereinafter "first steering" and "second steering" are respectively the directions of rotation marked in fig. 3, and are just an example, i.e. when the first steering is clockwise, the second steering is counter-clockwise; when the first steering is counterclockwise, the second steering is clockwise, and the first and second steering are not particularly limited in practical application.
As shown in fig. 1, 2 and 3, a first circular through hole 12 is provided in the pulley 1.
The pivot 3 is sleeved in the first circular through hole 12, a first annular bulge 4 is fixed at the rear end of the pivot 3, a second annular bulge 320 is fixed at the front end of the pivot 3, and the pivot 3, the first circular through hole 12 and the first annular bulge 4 are coaxial.
The center of first annular arch 4 can be provided with the spline through-hole, first annular arch 4 is made by wear-resisting material, can save the bush from this, can be general with first annular arch 4 design, the size of pivot 3 can be adjusted the design as required, has improved the holistic flexibility of use of pivot 3.
As shown, the pivot shaft 3 is provided with a through hole, in which a thread 310 may be provided, the thread 310 being used for connecting a generator shaft. Said first annular projection 4 is detached from the pivot shaft 3 when the pivot shaft 3 is not connected to the generator shaft, and the pivot shaft 3 and the first annular projection 4 are fixed together when the pivot shaft 3 is connected to the generator shaft.
The clutch device A comprises a torsion spring 5 and an annular body 6, the torsion spring 5 and the annular body 6 are located in a first circular through hole 12, and the torsion spring 5 and the annular body 6 are both sleeved on the outer side face of the pivot shaft 3. The annular body 6 is coaxial with the pivot 3, and the outer side surface of the annular body 6 is rotationally matched with the first circular through hole 12. When the belt pulley 1 rotates in the second steering direction around the axis, the belt pulley 1 is in interference fit with the torsion spring 5 and drives the torsion spring 5 to rotate in the second steering direction, the torsion spring 5 is in interference fit with the annular body 6 and drives the annular body 6 to rotate in the second steering direction, and the annular body 6 drives the pivot shaft 3 to rotate in the second steering direction.
The annular body 6 is located between the support component B and the second annular projection 320, and the front end face of the annular body 6 abuts against the support component B and the rear end face abuts against the first annular projection 4.
As shown in fig. 4 and 5, an annular protrusion 610 is disposed on a rear end surface of the annular body 6, an end of a front end portion of the torsion spring 5 is bent inward, the rear end portion of the torsion spring 5 is fixed to an inner wall of the first circular through hole 12, the front end portion is wound around an outer side surface of the annular protrusion 610, and an opening 620 penetrating through the annular protrusion 610 is disposed in the annular protrusion 610. When the torsion spring 5 rotates in the second rotation direction relative to the annular body 6, the end of the front end of the torsion spring 5 can penetrate into the opening 620.
The front end face of the second annular protrusion 320 is provided with a first spiral step 3210, and the rear end face of the annular body 6 is provided with a second spiral step 6210.
When the annular body 6 rotates relative to the pivot 3 in a first rotation direction, the spigot 6220 of the second spiral step 6210 is engaged with the groove 3220 of the first spiral step 3210; when the pulley 1 rotates around the axis in a second rotating direction, the clutch device A drives the pivot shaft 3 to rotate in the second rotating direction; when the pulley 1 rotates in a first direction about the axis, the pivot shaft 3 does not rotate; wherein the first and second directions of rotation are opposite.
The rear end of the inner wall of the first circular through hole 12 is provided with a third annular protrusion 13 extending inwards, the first annular protrusion 4 is located on the front side of the third annular protrusion 13, the first annular protrusion 4 and the third annular protrusion 13 are abutted against each other, and the outer side surface of the third annular protrusion 13 is matched with the inner wall of the first circular through hole 12 in a rotating mode.
The annular body 6 is pressed with a thrust washer 7, the center of the thrust washer 7 is provided with a hole, and the inner hole of the thrust washer 7 is in interference fit with the pivot 3. The thrust washer 7 is used for limiting the axial direction and the circumferential direction.
When the engine works, the engine generates load and transmits the load through the belt, the load is transmitted to the belt pulley 1, at the moment, the belt pulley 1 rotates according to the second rotation direction, the torsion spring 5 is in interference fit with the belt pulley 1, the load is transmitted to the torsion spring 5 through the belt pulley 1, the torsion spring 5 is in interference fit with the annular body 6, the torque is transmitted to the annular body 6, the spigot 6220 of the annular body 6 is meshed with the groove 3220 on the pivot shaft 3, and finally the torque is transmitted to the pivot shaft 3, so that the pivot shaft 3 rotates together with the belt pulley 1.
When the engine stops working, the pulley 1 and the pivot shaft 3 generate a speed difference to generate two opposite rotating directions, the pulley 1 rotates according to the first rotating direction, the pivot shaft 3 rotates according to the first rotating direction to cause the deformation and contraction of the torsion spring 5, the pivot shaft 3 does not rotate together with the pulley 1, and when the rotating speed of the crankshaft is the same as that of the generator shaft, the torsion spring 5 starts to interfere with the pulley 1 again, and the torsion spring 5 and the pulley 1 start to rotate in the same direction.
This makes it possible to: when pulley 1 rotates according to the first direction of rotation, pivot 3 and therefore pulley 1 as a whole rotate according to the first direction of rotation; when pulley 1 rotates in the second direction of rotation, pivot shaft 3 does not rotate with pulley 1. The clutch device A reduces the influence of crankshaft vibration on the generator, absorbs torsional vibration and moment impact, prolongs the service life of the generator and reduces noise generated in the vibration process.
The support component B is arranged at the front end of the inner wall of the first circular through hole 12, the support component B consists of a dynamic sealing cover 11, a pressing plate 9, a disc spring 10 and a support plate 8 which are sequentially arranged from front to back, a second circular through hole is formed in the support component B, the second circular through hole sequentially penetrates through the dynamic sealing cover 11, the pressing plate 9, the disc spring 10 and the support plate 8, the front end of the pivot shaft 3 is sleeved in the second circular through hole, and the outer side surface of the front end of the pivot shaft 3 is in rotating fit with the inner wall of the second circular through hole; the dynamic sealing cover 11 and the outer side surface of the supporting plate 8 are connected with the inner wall of the first circular through hole 12 in a sealing mode.
The dynamic sealing cover 11 is made of rubber. Alternatively, only the inner ring 1110 of the dynamic seal cover 11 may be made of rubber. As long as the dynamic seal cap 11 can achieve rotation.
The size of the cross section of the second annular protrusion 320 is larger than that of the second circular through hole.
The sealing ring 2, the part of the pivot 3 located at the rear side of the second annular bulge 320 is hermetically sleeved in the sealing ring 2, and the outer side surface of the sealing ring 2 is hermetically connected with the inner wall of the second annular bulge 320.
The dynamic sealing cover 11 is coaxial with the pivot shaft 3, the dynamic sealing cover 11 is in interference fit with the belt pulley 1, and the torsion spring damping assembly is sleeved in the middle of the pivot shaft 3.
The center of the support plate 8 is provided with a through hole, the diameter of the through hole is larger than the outer diameter of the pivot shaft 3, the support plate 8 and the pivot shaft 3 are coaxially arranged, and the support plate 8 is arranged on the thrust washer 7.
A parallel space is formed by the supporting plate 8 and the pressing plate 9, axial pretightening force is generated by the disc spring 10, and the dynamic sealing cover 11 supports the belt pulley 1.
In order to prolong the service life of the whole belt wheel, grease is injected into the inner cavity of the product. The dynamic seal cap 11 may also function to prevent oil leakage.
The design scheme of the utility model innovatively omits a bearing part, and the support plate 8, the pressure plate 9, the disc spring 10 and the dynamic sealing cover 11 together form a bearing function part, so that compared with the traditional generator damping belt pulley, the utility model greatly saves the cost on the premise of not influencing the function.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A unidirectional coupling damper pulley, comprising:
a pulley (1) in which a first circular through hole (12) is provided;
the hinge (3) is sleeved in the first circular through hole (12), a first annular bulge (4) is fixed at the rear end of the hinge (3), a second annular bulge (320) is fixed at the front end of the hinge (3), and the hinge (3), the first circular through hole (12) and the first annular bulge (4) are coaxial;
a clutch device (B) for driving the pivot shaft (3) to rotate in a second direction of rotation when the pulley (1) rotates in the second direction of rotation about the axis; when the pulley (1) rotates around the axis in a first steering direction, the pivot (3) does not rotate; wherein the first and second directions of rotation are opposite;
a third annular bulge (13) extending inwards is arranged at the rear end of the inner wall of the first circular through hole (12), the first annular bulge (4) is positioned on the front side of the third annular bulge (13), the first annular bulge (4) and the third annular bulge (13) are abutted against each other, and the outer side surface of the third annular bulge (13) is in running fit with the inner wall of the first circular through hole (12);
the front end of the inner wall of the first circular through hole (12) is provided with a supporting component (A), the supporting component (A) consists of a dynamic sealing cover (11), a pressing plate (9), a disc spring (10) and a supporting plate (8) which are sequentially arranged from front to back, a second circular through hole is formed in the supporting component (A), the second circular through hole sequentially penetrates through the dynamic sealing cover (11), the pressing plate (9), the disc spring (10) and the supporting plate (8), the front end of the pivot (3) is sleeved in the second circular through hole, and the outer side face of the front end of the pivot (3) is in rotating fit with the inner wall of the second circular through hole;
the size of the cross section of the second annular bulge (320) is larger than that of the cross section of the second circular through hole.
2. The unidirectional coupling damper pulley according to claim 1, characterized in that said clutching device (B) comprises:
the hinge comprises a torsion spring (5) and an annular body (6), wherein the torsion spring (5) and the annular body (6) are positioned in a first circular through hole (12), and the torsion spring (5) and the annular body (6) are sleeved on the outer side surface of a pivot (3);
when the belt pulley (1) rotates around the axis in the second steering mode, the belt pulley (1) is in interference fit with the torsion spring (5) and drives the torsion spring (5) to rotate along the second steering mode, the torsion spring (5) is in interference fit with the annular body (6) and drives the annular body (6) to rotate along the second steering mode, and the annular body (6) drives the pivot (3) to rotate along the second steering mode.
3. The unidirectional coupling damper pulley of claim 2, wherein:
the annular body (6) and the pivot (3) are coaxial, and the outer side face of the annular body (6) is in running fit with the first circular through hole (12).
4. The unidirectional coupling damper pulley of claim 2, wherein:
the annular body (6) is located between the supporting component (A) and the second annular bulge (320), and the front end face of the annular body (6) abuts against the supporting component (A) and the rear end face abuts against the first annular bulge (4).
5. The unidirectional coupling damper pulley of claim 4, wherein:
an annular bulge (610) is arranged on the rear end face of the annular body (6), the rear end part of the torsion spring (5) is fixed on the inner wall of the first circular through hole (12), the front end part of the torsion spring is wound on the outer side face of the annular bulge (610), and an opening (620) penetrating through the annular bulge (610) is arranged in the annular bulge (610);
when the torsion spring (5) rotates relative to the annular body (6) along a second rotation direction, the end head of the front end part of the torsion spring (5) can penetrate into the opening (620).
6. The unidirectional coupling damper pulley of claim 5, wherein:
the end of the front end part of the torsion spring (5) is bent inwards.
7. The unidirectional coupling damper pulley of claim 2, wherein:
a first spiral step (3210) is arranged on the front end face of the second annular bulge (320), and a second spiral step (6210) is arranged on the rear end face of the annular body (6);
when the annular body (6) rotates relative to the pivot (3) in a first rotating direction, the spigot (6220) of the second spiral step (6210) is meshed with the groove (3220) of the first spiral step (3210).
8. The unidirectional coupling damper pulley according to claim 1, wherein:
the outer side surfaces of the dynamic sealing cover (11) and the supporting plate (8) are in sealing connection with the inner wall of the first circular through hole (12).
9. The unidirectional coupling damper pulley of claim 1, further comprising:
the sealing ring (2), the pivot (3) is located the airtight cover of the part of the rear side of second annular arch (320) and is located in sealing ring (2), the lateral surface of sealing ring (2) and the inner wall sealing connection of second annular arch (320).
10. The unidirectional coupling damper pulley of claim 2, wherein:
the anti-thrust washer is characterized in that a thrust washer (7) is pressed on the annular body (6), a hole is formed in the center of the thrust washer (7), and an inner hole of the thrust washer (7) is in interference fit with the pivot (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122215271.7U CN216279280U (en) | 2021-09-14 | 2021-09-14 | Unidirectional coupling damping belt wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122215271.7U CN216279280U (en) | 2021-09-14 | 2021-09-14 | Unidirectional coupling damping belt wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216279280U true CN216279280U (en) | 2022-04-12 |
Family
ID=81064004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122215271.7U Active CN216279280U (en) | 2021-09-14 | 2021-09-14 | Unidirectional coupling damping belt wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216279280U (en) |
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2021
- 2021-09-14 CN CN202122215271.7U patent/CN216279280U/en active Active
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