CN212177704U - Elastic pin tooth type coupling - Google Patents
Elastic pin tooth type coupling Download PDFInfo
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- CN212177704U CN212177704U CN202020892595.7U CN202020892595U CN212177704U CN 212177704 U CN212177704 U CN 212177704U CN 202020892595 U CN202020892595 U CN 202020892595U CN 212177704 U CN212177704 U CN 212177704U
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Abstract
The utility model provides an elastic pin tooth type coupler, which comprises a first side back wheel; the first side back-rest wheel and the second side back-rest wheel are axially spaced; the outer loop forms the first pin hole that supplies first pin installation between outer loop and the first side back wheel, forms the second pin hole that supplies second pin installation between outer loop and the second side back wheel, and the symmetry sets up in axially spaced axial both sides between first pin and second pin and first pin hole and the second pin hole, and first pin includes column body section and the extension section of symmetry setting at column body section both ends. When the pin moves, the torque is still transmitted by the motor side backrest wheel → the first pin → the outer ring → the second pin → the fan side backrest wheel, so that the defect of overlarge fan vibration caused by the movement displacement of the pin is overcome, the service life of the primary fan is prolonged, and the long-period stable operation of the primary fan is effectively guaranteed.
Description
Technical Field
The utility model relates to a shaft coupling, concretely relates to tooth-like shaft coupling of elasticity pin.
Background
The single-suction double-support centrifugal fan is characterized in that the motor and the fan are connected and driven by an elastic pin tooth type coupling. The elastic pin tooth type coupler is a cylindrical pin (currently used nylon pins in our factory) made of a plurality of non-metal materials and is arranged in a involution hole between two half couplers and the inner surface of an outer ring; the torque is transmitted through the pin to realize the coupling transmission of the two half couplings.
Under the ideal state, the elastic pin is relatively fixed in the position of the corresponding half coupling, namely displacement does not occur, and the transmission mode of the torque is as follows in the operation process: the motor-side back wheel 4 → the pin 2 → the outer ring → the pin 1 → the fan-side back wheel 3, thereby realizing the rotation of the motor-driven fan, as shown in fig. 1.
This type of coupling has the following features:
1. the transmission torque is large, the rotation diameter is small under the same torque, the size is small, and the weight is light.
2. Simple structure, less component parts and convenient manufacture.
3. The maintenance is convenient, the service life is longer, and the nylon pin can be replaced by detaching the baffle.
4. The nylon pin is a self-lubricating material, so that lubrication is not needed, lubricating oil is saved, and the working environment is purified.
In actual production, the effect of the coupler is ideal at the initial stage of primary air fan production and use, and the body vibration parameters monitored in the primary air fan operation are relatively small and stable. However, as the running time of the unit goes forward, the nylon pin is under the action of torque for a long time, and the equipment vibrates to continuously wear the cylindrical nylon pin in the butt-jointed hole, so that the size of the pin is reduced, and the nylon pin moves relatively in the running process of the fan, as shown in fig. 2.
When play occurs, the nylon pins that were originally intended to be in the respective coupling halves may touch or even penetrate into the other coupling half. At the moment, in the running process of the fan, the torque can be directly transmitted to the fan side back wheel (the motor side back wheel → the pin 2 → the fan side back wheel) by the motor through the nylon pin, and the torque transmission mode is different from that in the normal state, namely the torque transmission of the whole body is interfered. And because the degree of wearing and tearing of every pin is different for the pin is different with the shaft coupling clearance between closing the hole, and the time that the pin directly transmitted the moment of torsion when taking place the drunkenness is also different, and when taking place multiunit pin drunkenness in the operation, the interference that forms will be bigger, and the performance on the fan is exactly that the vibration value grow at last, influences the steady operation of fan.
Disclosure of Invention
The utility model discloses to prior art's not enough, provide a tooth-like shaft coupling of elasticity pin, the pin can satisfy intensity needs, can not influence the transmission mode of moment of torsion originally again when the pin takes place the drunkenness to the vibration that the great reduction caused by the pin drunkenness. When the pin moves, even if the pin is penetrated to the other half of the coupler, due to the improvement of the size of the pin and the existence of the boss, the pin which moves cannot directly contact the other half of the coupler, namely, the torque is still transmitted by the motor side back rest wheel → the first pin → the outer ring → the second pin → the fan side back rest wheel, the defect that the fan vibrates too much due to the movement of the pin is overcome, the service life of the primary fan is prolonged, and powerful guarantee is provided for the long-period stable operation of the primary fan.
In order to achieve the above object, the utility model provides a following technical scheme: an elastic pin gear coupling comprises a gear shaft, a,
a first side back wheel;
the first side back-rest wheel and the second side back-rest wheel are axially spaced;
the outer loop, form the first pin hole that supplies the installation of first pin between outer loop and the first side back wheel, form the second pin hole that supplies the installation of second pin between outer loop and the second side back wheel, the symmetry sets up in axial spaced axial both sides between first pin and second pin and first pin hole and second pin hole, first pin includes the extension of column section and symmetry setting at column section both ends, the diameter of extension is less than the diameter of column section, the length of first pin hole is A, the length of column section is B, the length of extension is C, satisfy the relation: a- (B + 2C) > C.
In addition to the above, preferably, the material of the first pin and the second pin is PA 66.
On the basis of the above scheme, preferably, the outer side wall of one end of the first side back-rest wheel, which is opposite to the second side back-rest wheel, is provided with a first annular edge which is arranged circumferentially and is provided with a first groove,
the outer side wall of one end of the second side back-rest wheel, which is opposite to the first side back-rest wheel, is provided with a second annular edge which is arranged circumferentially, the second annular edge is provided with a second groove,
the outer ring is provided with a third groove and a fourth groove which are symmetrically arranged, the third groove and the second groove surround to form a first column pin hole, and the second groove surround to form a second column pin hole.
On the basis of the scheme, the outer ring preferably comprises a blocking plate and a ring body, wherein the blocking plate is respectively arranged on two axial sides of the ring body, and covers the first column pin hole and the second column pin hole.
In addition to the above, preferably, the blocking plate is screwed to the ring body.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through setting up the extension section to the both ends of pin, the diameter of extension section is less than the diameter of column body section, usually slightly little can, can satisfy the intensity needs, can not influence the transmission mode of original moment of torsion again when the pin takes place the drunkenness to the vibration that the significantly reduced is caused by the pin drunkenness. Specifically, when the pin play occurs, even if the first pin (second pin) is passed to the second pin hole (first pin hole), due to the improvement of the size of the pin and the existence of the lug boss (extension section), the displaced pin can not directly contact with the other half of the coupling (the first side back-rest wheel or the second side back-rest wheel), the torque transmission is still the first side back-wheel → the first pin → the outer ring → the second pin → the second side back-wheel, even if the first pin and the second pin are in contact, the transmission of torque is maintained as the first side back wheel → the first pin → the outer ring + the second pin → the second side back wheel, the phenomenon of the first side backrest wheel → the first pin → the second side backrest wheel can be avoided, the defect of overlarge vibration caused by the pin shifting displacement can be effectively avoided, the service life of the equipment is prolonged, and the long-period stable operation of the equipment is also effectively guaranteed.
2. The design of extension section is all set up at cylinder section both ends, can assemble wantonly when the pin assembly, need not to consider the direction problem, and the assembling process is swift, convenient.
3. The detachable mode of the outer ring is convenient for disassembly, assembly and maintenance.
Drawings
FIG. 1 is a schematic structural view of a prior art coupling;
FIG. 2 is a schematic view of the FIG. 1 after play;
fig. 3 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention, and herein, detachable fixation means that the original performance of the component is not damaged and can be disassembled.
As shown in fig. 3, the resilient pin tooth coupling, includes,
a first side back wheel 5;
a second side back-rest wheel 6, an axial interval is arranged between the first side back-rest wheel and the second side back-rest wheel;
the outer loop, form the first pin hole 7 that supplies the installation of first pin between outer loop and the first side back wheel, form the second pin hole 8 that supplies the installation of second pin between outer loop and the second side back wheel, the symmetry sets up in axially spaced axial both sides between first pin and second pin and first pin hole and second pin hole, first pin includes that cylinder section 9 and symmetry set up the extension 10 at cylinder section both ends, the diameter of extension is less than the diameter of cylinder section, the length of first pin hole is A, the length of cylinder section is B, the length of extension is C, satisfy the relation: a- (B + 2C) > C.
In the scheme, the extension sections are arranged at the two ends of the pin, the diameter of each extension section is smaller than that of the corresponding cylinder section, and the extension sections are usually slightly smaller, so that the strength requirement can be met, and the transmission mode of the original torque is not influenced when the pin moves, so that the vibration caused by the pin moving is greatly reduced. Specifically, when the pin play occurs, even if the first pin (second pin) is passed to the second pin hole (first pin hole), due to the improvement of the size of the pin and the existence of the lug boss (extension section), the displaced pin can not directly contact with the other half of the coupling (the first side back-rest wheel or the second side back-rest wheel), the torque transmission is still the first side back-wheel → the first pin → the outer ring → the second pin → the second side back-wheel, even if the first pin and the second pin are in contact, the transmission of torque is maintained as the first side back wheel → the first pin → the outer ring + the second pin → the second side back wheel, the phenomenon of the first side backrest wheel → the first pin → the second side backrest wheel can be avoided, the defect of overlarge vibration caused by the pin shifting displacement can be effectively avoided, the service life of the equipment is prolonged, and the long-period stable operation of the equipment is also effectively guaranteed.
Such as: the transmission device is applied to a single-suction double-support centrifugal fan, a motor and the fan are connected and transmitted through an elastic pin tooth type coupler, the pin is penetrated to the other half of the coupler when moving, and due to the improvement of the size of the pin and the existence of a boss, the pin which is displaced can not directly contact the other half of the coupler, namely, the transmission of torque is still the motor side back wheel → the first pin → the outer ring → the second pin → the fan side back wheel.
The first pin and the second pin are made of PA 66.
The outer side wall of one end of the first side back wheel, which is opposite to the second side back wheel, is provided with a first annular edge which is arranged circumferentially and is provided with a first groove,
the outer side wall of one end of the second side back-rest wheel, which is opposite to the first side back-rest wheel, is provided with a second annular edge which is arranged circumferentially, the second annular edge is provided with a second groove,
the outer ring is provided with a third groove and a fourth groove which are symmetrically arranged, the third groove and the second groove surround to form a first column pin hole, and the second groove surround to form a second column pin hole.
The outer ring comprises a blocking plate and a ring body, wherein the blocking plate is respectively arranged on two axial sides of the ring body, and the blocking plate covers the first column pin hole and the second column pin hole.
The blocking plate is fixed on the ring body through threads.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. An elastic pin gear coupling is characterized by comprising,
a first side back wheel;
the first side back-rest wheel and the second side back-rest wheel are axially spaced;
the outer loop, form the first pin hole that supplies the installation of first pin between outer loop and the first side back wheel, form the second pin hole that supplies the installation of second pin between outer loop and the second side back wheel, the symmetry sets up in axial spaced axial both sides between first pin and second pin and first pin hole and second pin hole, first pin includes the extension of column section and symmetry setting at column section both ends, the diameter of extension is less than the diameter of column section, the length of first pin hole is A, the length of column section is B, the length of extension is C, satisfy the relation: a- (B + 2C) > C.
2. The elastomeric pin tooth coupling of claim 1, wherein the first and second pins are made of PA 66.
3. The elastomeric pin tooth coupling of claim 1, wherein the outer side wall of the end of the first side back-wheel opposite the second side back-wheel has a circumferentially disposed first annular rim with a first groove thereon,
the outer side wall of one end of the second side back-rest wheel, which is opposite to the first side back-rest wheel, is provided with a second annular edge which is arranged circumferentially, the second annular edge is provided with a second groove,
the outer ring is provided with a third groove and a fourth groove which are symmetrically arranged, the third groove and the second groove surround to form a first column pin hole, and the second groove surround to form a second column pin hole.
4. The elastomeric pin tooth coupling of claim 3, wherein said outer race includes a closure plate and a ring body, one closure plate being mounted on each axial side of said ring body, said closure plates covering said first and second pin openings.
5. The elastomeric pin tooth coupling of claim 4, wherein the closure plate is threadably secured to the ring body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020892595.7U CN212177704U (en) | 2020-05-25 | 2020-05-25 | Elastic pin tooth type coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020892595.7U CN212177704U (en) | 2020-05-25 | 2020-05-25 | Elastic pin tooth type coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212177704U true CN212177704U (en) | 2020-12-18 |
Family
ID=73789024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020892595.7U Active CN212177704U (en) | 2020-05-25 | 2020-05-25 | Elastic pin tooth type coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212177704U (en) |
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2020
- 2020-05-25 CN CN202020892595.7U patent/CN212177704U/en active Active
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