One-piece elastic coupling

Abstract

The application provides a one-piece elastic coupling, which comprises a one-piece connecting sleeve and a connecting disc, the connecting sleeve is provided with a spline hole along an axis, the connecting disc is uniformly provided with a plurality of connecting through holes, the webs inside the connecting through holes are uniformly provided with a plurality of through hollow holes, and the connecting disc forms a spoke type or multi-width type web structure through the hollow holes. Preferably, the spline hole penetrates the connecting disc. Preferably, the connecting disc and the connecting sleeve are made of stainless steel. Preferably, the connecting disc and the connecting sleeve are integrally formed by die casting. Compared with the one-piece coupling in the prior art, the connecting sleeve part for axial damping of the application adopts spline connection, can bear a larger torque, has good guiding property, has high centering accuracy, has strong torque transmission capacity, and the spoke type or multi-width type web structure enables the one-piece elastic coupling to have good hardenability after heat treatment, so that the one-piece elastic coupling can be applied to medium and large torque transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of couplings, in particular to an integrally formed elastic coupling. BACKGROUND

[0002] Couplings are generally divided into rigid couplings and flexible couplings (referred to as elastic couplings when elastic elements are used), rigid couplings are used for strict centering of two shafts, and there is no relative displacement during operation, while flexible couplings are more commonly used for places where there is relative displacement between two shafts, and the integrally formed elastic coupling belongs to a kind of elastic coupling, which has a simple structure and achieves the purpose of elastic damping through axial machining of threaded grooves or parallel line grooves, and is mainly used for the connection of shafts with small torque, such as stepper motors and encoders. The connection of shafts with large torque often uses medium and large elastic couplings, which use elastic elements for damping. In order to solve the problem of wear caused by the mutual extrusion of elastic elements, methods such as increasing grease lubrication, pairing plastic rubber and metal friction, and inlaying elastic elements are often used to reduce the wear of elastic elements.

[0003] The prior art has the following disadvantages: the existing integrally formed elastic coupling wants to expand the thickness and be applied to the connection of shafts with large torque, but the strength performance may not meet the requirements due to the limitation of the hardenability of the material, and the hole and groove machining is difficult, so the existing integrally formed elastic coupling is limited in the application of medium and large torque transmission; medium and large elastic couplings can be applied to medium and large torque transmission, but in order to reduce the wear of elastic elements, there are many parts, so the structure of the coupling is relatively complex, the reliability and safety are reduced, and the maintenance operation is complicated. SUMMARY

[0004] The present application aims to: in view of the problems that the integrally formed coupling is limited in the application of medium and large torque transmission, the elastic coupling that can be applied to medium and large torque transmission has a complex structure, low reliability and complicated maintenance, an integrally formed coupling is provided, which has a simple structure and can be applied to medium and large torque transmission.

[0005] In order to achieve the above-mentioned application purpose, the present application provides the following technical scheme:

[0006] The integrally formed elastic coupling comprises an integrally formed connecting shaft sleeve and a connecting disc, the connecting shaft sleeve is provided with a spline hole along the shaft center, the connecting disc is uniformly provided with a plurality of connecting through holes, the web on the inner side of the connecting through hole is uniformly provided with a plurality of through hollow holes, and the connecting disc forms a spoke type or multi-rib web structure through the hollow holes.

[0007] The connecting sleeve is connected with the driving shaft or the driven shaft through the spline hole, the driven shaft or the driving shaft is fixed with the flange plate, the flange plate is fixed with the connecting disc through the bolt and the connecting through hole, the driving shaft is connected with the driven shaft through the spline hole, axial free expansion can be realized, and axial damping effect between the driving shaft and the driven shaft is realized; the abdominal plate is bent, extruded or stretched, radial elastic damping effect between the driving shaft and the driven shaft is realized, compared with the integral coupling in the prior art, the connecting sleeve part for axial damping in the application adopts spline connection, can bear larger torque, has good directivity, high centering accuracy, strong torque transmission capacity, the spoke type or multi-width abdominal plate structure can have good hardenability after heat treatment, and thus can be applied to medium and large torque transmission.

[0008] Preferably, the spline hole penetrates the connecting disc. To improve processing convenience.

[0009] Preferably, the connecting disc and the connecting sleeve are made of stainless steel. The stainless steel material has strong toughness, high corrosion resistance, can be used in harsh environments, and has fire and heat resistance, can resist fouling and maintain strength at high temperature.

[0010] Preferably, the connecting disc and the connecting sleeve are integrally formed by die casting. Die casting can make the coupling have excellent size accuracy, good overall structural strength, and high production efficiency, which is beneficial to batch production.

[0011] Preferably, the hollow hole includes an olive shape and a dumbbell shape, the olive shape and the dumbbell shape are distributed in a circle, the end of the dumbbell close to the center is smaller than the end away from the center, and the olive shape and the dumbbell shape make the spokes form an arc. Each pair of arc-shaped spoke concave surfaces are opposite and connected end to end. When the arc-shaped spokes are extruded or stretched, they are easy to bend and deform, so they have good damping effect; the opposite arrangement of the arc-shaped spokes facilitates the transmission of torque in two directions.

[0012] Preferably, the hollow hole is in a multi-node calabash shape, the calabash nodes gradually increase from the inside to the outside, and the multi-node calabash-shaped hollow hole makes the spokes form a wave shape. The wave shape provides enough space for spoke compression and stretching, which is conducive to realizing radial damping; when the wave-shaped spoke width increases, the torque carrying capacity can be improved, and when the wave-shaped spoke width decreases, the damping effect can be improved.

[0013] Further preferably, the plurality of segments of the pumpkin is composed of two types of pumpkin segments, the two types of pumpkin segments are distributed in a circumferential staggered manner, the number of nodes of the two types of pumpkin segments is different by one segment, and the two adjacent pumpkin segments make the spoke form a wave shape. The wave-shaped spoke is easy to compress and stretch, cooperates with the cavity formed between the two wave-shaped spokes, has excellent radial shock absorption capacity, and is therefore easy to deform when transmitting torque, and is therefore not suitable for transmitting large torque.

[0014] Preferably, each of the plurality of web plates is rectangular with equal width, and the adjacent web plates are connected by two circumferentially extending connecting spokes, the connecting spokes are formed by three radially distributed hollow holes, the middle hollow hole is in the shape of an olive, the short axis of the olive is in the radial direction of the connecting disc, so that the two connecting spokes form a head-to-tail and concave-to-concave structure. The torque is transmitted from the web plate on the connecting shaft sleeve to the web plate on the outer ring through the connecting spokes, regardless of the direction of the torque, half of the spokes bear tensile stress and the other half bear compressive stress, the spokes have strong tensile resistance, the compressed part can be deformed to make it not be easily damaged, and therefore can be applied to medium and large torque transmission; a gap is formed between the web plate and the outer wall of the connecting disc or the connecting shaft sleeve, the gap is used for the offset of the connecting shaft sleeve, so that radial shock absorption is realized, and the resistance is provided by the connecting spokes when the connecting shaft sleeve is offset, the deformation of the arc plate of this structure is small, and therefore the resistance is small, and therefore the radial shock absorption effect is excellent.

[0015] The number of web plates of the plurality of web plates is 8.

[0016] The beneficial effects of the present application are that the stainless steel material has high toughness and corrosion resistance, the structure size precision of the die-casting integrated structure is good, the structure is simple, the reliability is high, the spoke type or multi-web plate structure is easy to heat treat to meet the sufficient hardenability, and therefore has high structural strength to transmit large torque. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic front view of embodiment 1 of the present application;

[0018] Figure 2 It is a structure schematic side view of Figure 1 ;

[0019] Figure 3 It is a structure schematic side view of embodiment 2 of the present application;

[0020] Figure 4 It is a structure schematic side view of embodiment 3 of the present application;

[0021] Figure 5 It is a structure schematic side view of embodiment 4 of the present application.

[0022] Marked in the figure: 1-connection sleeve, 2-connection disc, 3-spline hole, 4-connection through hole, 5-hollow hole. DETAILED DESCRIPTION

[0023] The application will be described in further detail below with reference to the drawings.

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0025] Example 1

[0026] Referring to Figure 1 and Figure 2 , the present embodiment provides a one-piece elastic coupling, comprising a one-piece connection sleeve 1 and a connection disc 2, the connection sleeve 1 is provided with a spline hole 3 along the axis, the connection disc 2 is uniformly distributed with a plurality of connection through holes 4, the web inside the connection through hole 4 is uniformly distributed with a plurality of through hollow holes 5, the connection disc 2 forms a spoke type or multi-width web structure through the hollow holes 5.

[0027] The spline hole 3 penetrates the connection disc 2.

[0028] The connection disc 2 and the connection sleeve 1 are made of stainless steel.

[0029] The connection disc 2 and the connection sleeve 1 are integrally formed by die casting.

[0030] The hollow hole 5 includes an olive shape and a dumbbell shape, the olive-shaped and dumbbell-shaped hollow holes 5 are circumferentially staggered, and the end of the dumbbell close to the center is smaller than the end away from the center, the olive-shaped and dumbbell-shaped hollow holes 5 together make the spokes form an arc, and each pair of the arc-shaped spokes concave surfaces are opposite and connected end to end.

[0031] Example 2

[0032] Referring to Figure 3 Compared with example 1, the hollow hole 5 is in the shape of a multi-node calabash, the calabash nodes gradually increase from inside to outside, and the multi-node calabash-shaped hollow hole 5 makes the spokes form a wave shape.

[0033] Example 3

[0034] Referring to Figure 4 Compared with example 2, the multi-node calabash is composed of two specifications of calabash nodes, the two specifications of calabash nodes are circumferentially staggered, the number of nodes of the two specifications of calabash nodes differs by one node, and the adjacent two kinds of calabash nodes make the spokes form a wave shape.

[0035] Example 4

[0036] Referring to Figure 5 Compared with the embodiment 1, the hollow hole 5 makes the connecting disc 2 form a multi-web structure, each web of the multi-web is rectangular with equal width, and the adjacent webs are connected by two circumferentially extending connecting spokes, the connecting spokes are formed by three radially distributed hollow holes 5, the middle hollow hole 5 is olive-shaped, the short axis of the olive is located in the radial direction of the connecting disc 2, so that the two connecting spokes form a head-to-tail structure with concave surfaces opposite to each other.

[0037] The number of webs of the multi-web is 8.

[0038] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A one-piece molded flexible coupling, characterized in that, The application relates to a connecting shaft sleeve (1) and a connecting disc (2) which are integrally formed, the connecting shaft sleeve (1) is provided with a spline hole (3) along an axis, the connecting disc (2) is uniformly provided with a plurality of connecting through holes (4), a plurality of through hollow holes (5) are uniformly distributed on the webs on the inner sides of the connecting through holes (4), the connecting disc (2) forms a spoke type or multi-width web structure through the hollow holes (5); the spline hole (3) penetrates the connecting disc (2); the connecting disc (2) and the connecting shaft sleeve (1) are made of stainless steel; the connecting disc (2) and the connecting shaft sleeve (1) are integrally formed by die casting; the hollow holes (5) are olive-shaped and dumbbell-shaped, or the hollow holes (5) are multi-sectioned gourd-shaped, or each web of the multi-width web is rectangular with equal width.

2. The integrally formed elastomeric coupling of claim 1, wherein, The olive-shaped and dumbbell-shaped hollow holes (5) are circumferentially staggered, and the dumbbell-shaped hollow hole (5) is smaller at one end close to the center than at the other end away from the center; the olive-shaped and dumbbell-shaped hollow holes (5) jointly make the spokes form arcs; each pair of the arc-shaped spokes has opposite concave surfaces and is connected end to end.

3. The integrally formed elastomeric coupling of claim 1, wherein, The gourd sections gradually increase from the inside to the outside, and the multi-sectioned gourd-shaped hollow holes (5) make the spokes form a wave shape.

4. The integrally formed elastomeric coupling of claim 3, wherein, The multi-sectioned gourd is composed of two specifications of gourd sections, the two specifications of gourd sections are circumferentially staggered, the number of nodes of the two specifications of gourd sections is different by one section, and the adjacent two specifications of gourd sections make the spokes form a wave shape.

5. The integrally formed elastomeric coupling of claim 1, wherein, The adjacent webs are connected through two circumferentially extending connecting spokes, the connecting spokes are formed by three circumferentially extending connecting spokes, the middle connecting spoke is olive-shaped, and the short axis of the olive is located in the radial direction of the connecting disc (2), so that the two connecting spokes form a structure connected end to end and having opposite concave surfaces.

6. The integrally formed elastomeric coupling of claim 5, wherein, The number of webs of the multi-width web is eight.

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