Elastic pin coupling
By using a limiting groove and a limiting protrusion in the flexible pin coupling, quick disassembly and replacement are achieved after the pin breaks, which solves the problem of low maintenance efficiency in the existing technology and improves the maintenance efficiency of the equipment.
Patent Information
- Application Number
- CN202522382686.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-11-10
AI Technical Summary
Existing flexible pin couplings are difficult to disassemble and replace quickly after the pin breaks, resulting in low equipment maintenance efficiency.
A flexible pin coupling was designed. By setting a coupling plate between the back wheel on the motor side and the back wheel on the powder feeder side, and using the matching connection of the limiting groove and the limiting protrusion, a radial unidirectional assembly anti-disengagement limiting structure is realized, so that the coupling plate can be removed radially when the pin breaks, simplifying the replacement process.
It improves equipment maintenance efficiency, avoids disassembly operations caused by stuck elastic pins, and simplifies the replacement process of pins and coupling plates.
Smart Images
Figure CN224679937U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a coupling technical field especially relates to a kind of elastic pin coupling. BACKGROUND
[0002] In the transmission system of industrial equipment, coupling is used to connect driving shaft and driven shaft to transmit torque and compensate displacement. Elastic pin coupling is widely used in boiler powder feeder and other material conveying equipment because it has certain buffering, damping and overload protection effect.
[0003] The existing elastic pin coupling will break when the motor is overloaded due to the jamming of the powder feeder during operation, thereby protecting the motor. However, the broken pin is often stuck in the gap of the backrest wheel due to deformation, and cannot be removed through the original pin hole. Only the motor or powder feeder can be disassembled, and the replacement process is complicated and time-consuming, affecting the efficiency of equipment operation.
[0004] Therefore, an elastic pin coupling that allows easy disassembly and replacement of the pin or coupling piece after the pin breaks, and has high equipment maintenance efficiency, needs to be designed. SUMMARY
[0005] The utility model aims at the defects and deficiencies of prior art, provides an elastic pin coupling, which at least solves one of the above technical problems, has the advantages of easy disassembly and replacement of the pin or coupling piece after the pin breaks, and high equipment maintenance efficiency.
[0006] To achieve the above-mentioned purpose, the utility model provides an elastic pin coupling, comprising: A motor-side backrest wheel is connected with the driving shaft; A powder feeder-side backrest wheel is connected with the driven shaft; A coupling piece is arranged between the motor-side backrest wheel and the powder feeder-side backrest wheel, and is connected with the motor-side backrest wheel through an elastic pin; Wherein, the side of the powder feeder-side backrest wheel away from the driving shaft cooperates with the side of the coupling piece away from the motor-side backrest wheel, one is provided with a radial extending limiting groove, and the other is provided with a limiting convex part matched with the limiting groove, The limiting groove has two ends opening, and the groove width gradually decreases from one end to the other end along the radial direction, to form a one-way radial assembly anti-disengagement limiting structure.
[0007] Optionally, the limiting groove is arranged on the powder feeder-side backrest wheel, and the limiting convex part is arranged on the coupling piece, so that the coupling piece is radially assembled from the end with larger groove width and is limited and fixed.
[0008] Optionally, the limiting groove has a rectangular, trapezoidal, dovetail-shaped or arc-shaped cross-sectional shape, and the limiting protrusion has a shape matching the limiting groove.
[0009] Optionally, the coupling piece has a first pin hole on each side of the limiting protrusion, and the two first pin holes are symmetrical and located on a diameter line of the coupling piece.
[0010] Optionally, the motor-side backrest wheel has two pairs of second pin holes matching the first pin holes and arranged in a circumferential array outside the shaft center.
[0011] Optionally, the coupling piece has an observation hole in the outer periphery, the observation hole is in communication with the first pin hole, and the observation hole is perpendicular to the axis of the first pin hole.
[0012] Optionally, the motor-side backrest wheel has a first annular protruding column at one end facing away from the coupling piece for assembly of a driving shaft, the powder feeder-side backrest wheel has a second annular protruding column at one end facing away from the coupling piece for assembly of a driven shaft, and the first annular protruding column and the second annular protruding column have key grooves in the inner holes.
[0013] Compared with the prior art, the advantages of the present application are: The elastic pin coupling device sets a coupling piece between the motor-side backrest wheel and the powder feeder-side backrest wheel, connects the coupling piece with the motor-side backrest wheel through elastic pins, and connects the coupling piece with the motor-side backrest wheel through the cooperation of the limiting groove and the limiting protrusion extending in the radial direction and gradually decreasing in groove width, thereby achieving the anti-disengagement limiting function of one-way assembly in the radial direction. The structure makes the coupling piece stable in connection and difficult to disengage during operation. When the elastic pin is broken due to overload, the coupling piece can be taken out in the radial direction, thereby increasing the back gap between the motor-side backrest wheel and the powder feeder-side backrest wheel, quickly replacing the elastic pin or the coupling piece, avoiding the disassembly operation caused by the jamming of the elastic pin, and improving the efficiency of equipment maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.
[0015] Figure 1 FIG. 1 is a structural schematic view of an elastic pin coupling device according to an embodiment of the present application; Figure 2It is the side view structural schematic diagram of the elastic pin coupling of the embodiment of the utility model; Figure 3 For Figure 2 The cross section view along A-A line in the middle; Figure 4 For Figure 2 The cross section view along B-B line in the middle; Figure 5 It is the exploded structural schematic diagram of the elastic pin coupling of the embodiment of the utility model under one visual angle; Figure 6 It is the exploded structural schematic diagram of the elastic pin coupling of the embodiment of the utility model under another visual angle; Mark explanation 100-elastic pin coupling; 1-motor side backrest wheel; o2-second pin hole; 11-first annular convex column; a-key groove; 2-powder feeder side backrest wheel; b-limiting groove; 21-second annular convex column; 3-coupling piece; 31-limiting convex part; o1-first pin hole; o3-observation hole; 4-elastic pin; 5-driving shaft; 6-driven shaft; 7-key block. Specific implementation
[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.
[0017] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential" and the like of the utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the first, second and the like are only for distinguishing the same or similar structures, and do not mean a certain special limitation on the arrangement order or connection relationship.
[0018] Please refer to Figures 1 to 6The utility model embodiment provides a kind of elastic pin coupling 100, comprising: motor side backrest wheel 1, powder feeder side backrest wheel 2 and coupling piece 3.
[0019] Motor side backrest wheel 1 is connected with driving shaft 5, and powder feeder side backrest wheel 2 is connected with driven shaft 6.Coupling piece 3 is arranged between motor side backrest wheel 1 and powder feeder side backrest wheel 2, and is connected with motor side backrest wheel 1 by elastic pin 4.The side of powder feeder side backrest wheel 2, which is away from driving shaft 5, cooperates with the side of coupling piece 3, which is away from motor side backrest wheel 1.Among them, the side of powder feeder side backrest wheel 2, which is away from driving shaft 5, is equipped with the limit groove b extending along the radial direction, and the side of coupling piece 3, which is away from motor side backrest wheel 1, is equipped with the limit protrusion 31 matched with limit groove b.The both ends of limit groove b are open, and the groove width gradually decreases along the radial direction from one end to the other end, so that coupling piece 3 is loaded along the radial direction from the end with larger groove width and is limited and fixed, thereby forming the anti-disengagement limit cooperation structure of the radial one-way assembly.
[0020] Of course, in another embodiment, limit groove b can be arranged on coupling piece 3, and limit protrusion 31 is correspondingly arranged on powder feeder side backrest wheel 2;To realize the same one-way assembly and anti-disengagement limit effect.
[0021] When working normally, elastic pin 4 can limit the radial displacement of coupling piece 3, motor side backrest wheel 1 and powder feeder side backrest wheel 2 clamp coupling piece 3 to limit the axial displacement of coupling piece 3, and the cooperation of limit groove b and limit protrusion 31 limits the circumferential displacement, so that coupling piece 3 is connected stably with motor side backrest wheel 1 and powder feeder side backrest wheel 2, and is not easy to disengage;When elastic pin 4 is broken due to overload, coupling piece 3 can be taken out along the radial direction, thereby increasing the backlash between motor side backrest wheel 1 and powder feeder side backrest wheel 2, so that elastic pin 4 or coupling piece 3 can be replaced quickly, and the disassembly operation caused by the jamming of elastic pin 4 is avoided, and the efficiency of equipment maintenance is improved.
[0022] Optionally, please refer to Figures 3 to 6 In the embodiment, the cross-sectional shape of limit groove b is rectangular, and the shape of limit protrusion 31 is also rectangular, matched with limit groove b.It can be understood that, in other embodiments, the cross-sectional shape of limit groove b can also be rectangular, trapezoidal, dovetail-shaped or arc-shaped groove.Here is not specifically limited.
[0023] Optionally, please refer to Figure 5 And Figure 6In the embodiment, the coupling piece 3 is provided with a first pin hole o1 on each side of the limiting protrusion 31, and the two first pin holes o1 are symmetrical and located on the diameter line of the coupling piece 3. The motor side backrest wheel 1 is provided with two pairs of second pin holes o2 matching the first pin hole o1 on the outer circumferential array of the shaft. In this way, the elastic pin 4 is arranged in a pair of first pin holes o1 and one pair of second pin holes o2 to realize the connection between the motor side backrest wheel 1 and the coupling piece 3. The other pair of second pin holes o2 is used as a backup. If the original pair of second pin holes o2 cannot be inserted into the pin due to wear and jam, etc., the pair of second pin holes o2 can be used as a backup. Of course, in other embodiments, the motor side backrest wheel 1 can be provided with one, three or more pairs of second pin holes o2 matching the first pin hole o1 on the outer circumferential array of the shaft. Herein, no specific limitation is made.
[0024] Optionally, please refer to Figure 4 and Figure 6 In the embodiment, the coupling piece 3 is provided with an observation hole o3 on the outer periphery, the observation hole o3 is in communication with the first pin hole o1, and is perpendicular to the axis of the first pin hole o1. In this way, the pin installation alignment is more convenient, and the pin state is easy to observe.
[0025] Optionally, please refer to Figure 5 and Figure 6 In the embodiment, the motor side backrest wheel 1 has a first annular protruding column 11 on the end facing away from the coupling piece 3 for assembling the driving shaft 5; the powder feeder side backrest wheel 2 has a second annular protruding column 21 on the end facing away from the coupling piece 3 for assembling the driven shaft 6; and the inner hole of the first annular protruding column 11 and the second annular protruding column 21 is provided with a key groove a. In this way, the driving shaft 5 of the motor is assembled in the shaft hole of the first annular protruding column 11 through the key block 7; and the driven shaft 6 of the powder feeder is assembled in the shaft hole of the second annular protruding column 21 through the key block 7, realizing the coaxial connection of the motor driving shaft 5 and the powder feeder driven shaft 6.
[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An elastomeric pin coupling, characterized by, include: The motor side has a back wheel that connects to the drive shaft. The powder feeder has a side-mounted wheel that is connected to the driven shaft. A coupling plate is disposed between the motor-side backrest wheel and the powder feeder-side backrest wheel, and is connected to the motor-side backrest wheel by an elastic pin; The side of the powder feeder's back wheel facing away from the drive shaft and the side of the coupling plate facing away from the motor's back wheel cooperate with each other. One side has a radially extending limiting groove, and the other side has a limiting protrusion that cooperates with the limiting groove. The limiting groove is open at both ends, and the groove width gradually decreases from one end to the other in the radial direction to form a radially unidirectional assembly anti-detachment limiting fit structure.
2. The elastomeric bushing coupling of claim 1, wherein, The limiting groove is provided on the side back wheel of the powder feeder, and the limiting protrusion is provided on the coupling plate, so that the coupling plate is installed radially from the end with the larger groove width and the limiting and fixing is achieved.
3. The elastomeric bushing coupling of claim 1, wherein, The cross-sectional shape of the limiting groove is rectangular, trapezoidal, dovetail-shaped, or arc-shaped, and the shape of the limiting protrusion matches the limiting groove.
4. The elastomeric bushing coupling of claim 2, wherein, The coupling plate has a first pin hole on each side of the limiting protrusion, and the two first pin holes are symmetrical and located on the diameter line of the coupling plate. The motor side back wheel has at least one pair of second pin holes that match the first pin holes arranged in a circumferential array on the outer side of the shaft.
5. The elastomeric bushing coupling of claim 4, wherein, The motor-side back wheel has two pairs of second pin holes arranged in a circular array on the outer side of the shaft, which match the first pin hole.
6. The elastomeric bushing coupling of claim 4, wherein, The coupling plate has an observation hole on its outer periphery. The observation hole is connected to the first pin hole and is perpendicular to the axis of the first pin hole.
7. The elastomeric bushing coupling of claim 1, wherein, The motor-side back wheel has a first annular protrusion at the end facing away from the coupling plate for assembling the drive shaft; the powder feeder-side back wheel has a second annular protrusion at the end facing away from the coupling plate for assembling the driven shaft; and keyways are provided on the inner holes of the first annular protrusion and the second annular protrusion.