Spline shaft type coupling

Abstract

The utility model relates to the technical field of couplings, and discloses a spline shaft type coupling which comprises an external component and an internal component, the internal component comprises an intermediate shaft and a mounting flange, and the intermediate shaft is detachably connected with the mounting flange; an outer spline is arranged at the other end of the middle shaft, an inner spline is arranged in the outer component, and the outer component and the inner component are in transmission connection through matching of the inner spline and the outer spline. In actual use, the spline shaft type coupling is simple and convenient in overall maintenance operation and high in maintenance efficiency through the detachable intermediate shaft and the mounting flange.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling technical field, concretely relates to a spline shaft type coupling. BACKGROUND

[0002] Diesel engines occupy an irreplaceable market position in the fields of transportation, industrial power generation, and energy supply in remote areas due to their high thermal efficiency, high reliability, and wide adaptability. Their technical advantages enable them to continue to play an important role in infrastructure expansion in developing countries and new energy transformation, especially in heavy machinery, marine power, and hybrid power systems. However, periodic torque fluctuations and vibration problems under complex working conditions require elastic damping couplings for efficient power transmission to absorb impacts, compensate for installation deviations, reduce transmission system noise, reduce bearing and gear fatigue damage, and protect downstream equipment from transient overload damage.

[0003] After existing elastic damping couplings are operated for a long time under high load, the connecting shaft and spring plate inside the coupling frequently come into contact with each other, and continuous friction easily causes parts to wear out, and in severe cases, even damage. Once this happens, the entire coupling needs to be reprocessed and replaced, which consumes a lot of time and effort. This directly leads to low maintenance efficiency of the coupling, making it difficult to meet the urgent needs of users for quick repair and normal operation of the equipment. At the same time, the complex maintenance process significantly increases maintenance costs, including labor costs, material costs, and production losses caused by equipment downtime, which cannot reduce the user's overall cost, thereby greatly affecting the user experience, seriously affecting the market competitiveness of the product and the user's confidence in using related equipment. UTILITARIAN CONTENT

[0004] The utility model intends to provide a spline shaft type coupling to solve the problems of low maintenance efficiency and high maintenance cost of existing couplings.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a spline shaft type coupling, comprising an external component and an internal component, the internal component comprising a middle shaft and a mounting flange, the middle shaft and the mounting flange being detachably connected; the other end of the middle shaft is provided with an external spline, the internal component is provided with an internal spline, and the external component and the internal component are transmissionally connected through the internal spline and the external spline.

[0006] The principle and advantages of the present scheme are as follows:

[0007] 1. Improve the maintenance efficiency of the coupling:

[0008] The external member and the internal member are connected by spline fitting in the scheme, and the internal member is composed of a detachable intermediate shaft and a mounting flange. When the internal member has a problem, i.e. the spline part of the intermediate shaft is rubbed with the reed to cause wear, the maintenance personnel can directly disassemble the intermediate shaft from the mounting flange without complex disassembly, re-manufacturing and assembly of the entire internal member. Different specifications of equipment correspond to different specifications of mounting flanges, but the intermediate shaft is generally applicable to a certain extent. If the hole on the mounting flange needs to meet the same drilling technical requirements during re-manufacturing, the completion time of the new spline shaft will be prolonged to a certain extent. However, the scheme can use the intermediate shaft of the same specification which has been produced to repair and replace, without reprocessing the entire internal member, greatly simplifying the maintenance process and improving the maintenance efficiency.

[0009] 2. Reduce the maintenance cost of the coupling

[0010] The intermediate shaft and the mounting flange are designed as a detachable structure in the scheme. In terms of labor cost, the simplified maintenance process means that the labor hours required for maintenance are greatly reduced, and the maintenance personnel do not need to spend a lot of time on complex overall disassembly and reassembly, reducing the labor cost. In terms of material cost, the damaged parts can be replaced individually, and the intermediate shaft or the mounting flange is a single component, so the manufacturing cost is much lower than the reprocessing cost of the entire internal member, thereby reducing the material procurement cost. In terms of equipment downtime loss, the rapid maintenance process significantly shortens the equipment downtime, reducing the economic loss caused by production stagnation due to equipment downtime. Whether it is a flow line equipment in industrial production or a vehicle or ship in the field of transportation, the reduction of equipment downtime means the improvement of production efficiency and the increase of economic benefits.

[0011] 3. Improve the reliability and stability of the equipment

[0012] The external member and the internal member are connected by spline fitting, which can provide more stable and efficient power transmission. Compared with the traditional connection method, the multi-tooth meshing structure of the spline can better withstand torque and reduce the influence of torque fluctuation and complex working condition vibration on the transmission system, further reducing the fatigue damage of bearings and gears, improving the reliability and stability of equipment operation, and prolonging the overall service life of the equipment.

[0013] Further, a shoulder connection structure is provided between the intermediate shaft and the mounting flange, which includes an outer shoulder and an inner shoulder, and a plurality of connection bolts are uniformly arranged between the two.

[0014] Beneficial effects: In this scheme, through the stop mouth connecting structure, the outer stop mouth and the inner stop mouth are tightly matched to form a circumferential limiting constraint, which can effectively limit the relative displacement of the intermediate shaft and the mounting flange in the circumferential direction. At the same time, the uniformly distributed several connecting bolts further provide axial fastening force. This combination of circumferential limiting and axial fastening greatly enhances the stability of the connection between the intermediate shaft and the mounting flange.

[0015] Secondly, the outer stop mouth and the inner stop mouth are nested with each other, occupying less space, and the uniformly distributed connecting bolts provide fastening force without additional space occupation. This compact structure design enables the coupling to realize stable connection and efficient power transmission in limited space. Moreover, the cooperation of the outer stop mouth and the inner stop mouth and the uniform distribution of the connecting bolts enable the stress to be evenly distributed at the connection site, avoiding stress concentration. This uniform stress distribution greatly improves the fatigue resistance of the connection site.

[0016] Furthermore, the stop mouth connecting structure has a natural centering guide function. When assembling, the outer stop mouth and the inner stop mouth can automatically guide the intermediate shaft and the mounting flange to achieve accurate centering by their precise fit tolerances, greatly simplifying the assembly process, shortening the assembly time, and improving the maintenance efficiency.

[0017] Further, the outer member includes a fixed flange, an intermediate block and a fastening block, and a fixed connection structure is provided between the three, including a plurality of annularly distributed fixed bolts; the intermediate shaft is provided with a receiving groove at the end of the outer spline, and the fastening block cooperates with the receiving groove to limit the internal member.

[0018] Beneficial effects: When installing the outer member, the fixed flange, the intermediate block and the fastening block are connected by the annularly distributed fixed bolts. This standardized and modular connection method makes the assembly process more orderly and efficient. Assembly personnel only need to tighten the bolts according to the specified order and torque to complete the assembly of the outer member. For the internal member, the cooperation of the receiving groove of the intermediate shaft and the fastening block is simple and intuitive, facilitating quick positioning and installation. In the coupling maintenance process, the assembly time can be significantly shortened, the efficiency can be improved, and the maintenance cost can be reduced.

[0019] Further, the inner stop mouth is provided on the intermediate shaft, and the outer stop mouth is provided on the mounting flange.

[0020] Beneficial effects: On the one hand, since the installation flange is usually large in size and relatively fixed in position, the outer stop is arranged here, and the installation personnel can more easily observe and operate to guide the accurate insertion of the intermediate shaft. If the outer stop is arranged on the intermediate shaft, the intermediate shaft is relatively flexible during operation and is not easy to hold, which will increase the difficulty of alignment and prolong the installation time. On the other hand, the installation flange is usually connected with the fixed part of the equipment, and the outer stop is arranged here, which can better disperse the external forces such as vibration, impact and torque fluctuation from the intermediate shaft to the overall structure of the equipment. If the outer stop is on the intermediate shaft, the dynamic changes of the intermediate shaft during power transmission will make the stress borne by the outer stop more complex and concentrated, which is not conducive to the stability of the connection.

[0021] Further, the outer stop protrudes from the installation flange, the protrusion height of the outer stop is h, the length of the intermediate shaft except the external spline is H, and the ratio of h to H is in the range of 4% to 6%.

[0022] Beneficial effects: The ratio of h to H is limited to be in the range of 4% to 6%, on the one hand, the protruding part of the outer stop can build an extremely effective additional support structure at the connection site, which can effectively share the external forces such as vibration, impact and torque fluctuation transmitted by the intermediate shaft under high load and complex working conditions such as continuous operation of large industrial equipment or operation of engineering machinery in rugged terrain; on the other hand, the protruding part of the outer stop provides a very clear and stable guide path for the inner stop, which can efficiently guide the intermediate shaft to quickly align during assembly, while effectively resisting the deviation caused by improper operation or external interference.

[0023] If the ratio of h to H is less than 4%, the protrusion height of the outer stop is insufficient, and it is difficult to form an effective support structure. When the equipment is running, the connection site cannot fully disperse stress with the help of the outer stop in the face of larger external forces, resulting in excessive stress concentration at the connection site of the intermediate shaft and the installation flange; and during assembly of the intermediate shaft and the installation flange, it is difficult to effectively guide the centering, which reduces the assembly and maintenance efficiency.

[0024] If the ratio of h to H is greater than 6%, the outer stop protrudes too high, which will cause the center of gravity of the connection structure to deviate, and when the equipment is running, it is easy to cause additional shaking; and during assembly, excessive interference phenomenon may occur, which requires additional adjustment of the installation sequence or the addition of auxiliary installation tools. During maintenance, the high outer stop may affect the operation space of the maintenance personnel, for example, during maintenance of the equipment coupling in a narrow space, the high outer stop makes it difficult for the maintenance personnel to use tools, increasing the difficulty and risk of maintenance.

[0025] Further, the protrusion height h of the outer stop is in the range of 5 to 20 mm.

[0026] Beneficial effect: from the aspect of processing difficulty, when the protruding height of the external stop is in the range of 5-20mm, the processing difficulty is in a relatively reasonable interval. For the machining process, this height range does not require special long tools or high-precision deep hole machining equipment. If the protruding height of the external stop is too small, the precision requirement of the processing equipment is extremely high during the machining process. Because the size is too small, a slight deviation of the tool can cause the size of the external stop to not meet the requirements, increasing the cost of material scrap. If the protruding height of the external stop is too high, the processing difficulty increases significantly. For turning, a long tool is needed, and long tools are prone to vibration during machining, affecting the machining precision.

[0027] From the aspect of structural strength, the above range allows the external stop to form a good structural strength with the mounting flange. The protruding part of the external stop can uniformly transmit force to the mounting flange when bearing external force, enhancing the strength of the entire connection structure. If h is less than 5mm, the external stop has limited effect on the structural strength enhancement of the mounting flange; when h is greater than 20mm, the external stop protrudes too high, making the stress condition of the mounting flange complex. The external stop protrudes too high, which may cause stress concentration phenomenon at the connection with the mounting flange when bearing external force.

[0028] From the aspect of maintenance cost, when the equipment is maintained, the size of the external stop is moderate, allowing maintenance personnel to conveniently perform disassembly, inspection, and replacement operations. If h is less than 5mm, the external stop does not protrude obviously, making it difficult for maintenance personnel to quickly locate and operate the connection part during maintenance. When h is greater than 20mm, the external stop protrudes too high, occupying too much space during maintenance and affecting the operation space of the maintenance personnel.

[0029] Further, the diameter of the intermediate shaft is D, the wall thickness between the internal stop and the intermediate shaft is d, and the ratio of d to D is in the range of 3%-5%.

[0030] Beneficial effects: within the above ratio range, when the intermediate shaft is subjected to external forces such as torque, vibration and impact, the inner stop can effectively share the load with the intermediate shaft, so that the stress is evenly distributed. If the ratio is less than 3%, it means that the wall thickness between the inner stop and the intermediate shaft is too thin. When the equipment is running and subjected to a larger external force, the thin wall thickness cannot withstand the stress, and cracks are easily generated at the connection between the inner stop and the intermediate shaft, which may further expand to cause structural failure. Moreover, due to the thin wall thickness, deformation problems may occur during processing, whether it is cutting force during turning or tool extrusion during boring, which may cause uncontrollable deformation of the thin-walled structure, resulting in difficulty in ensuring the dimensional accuracy. If the ratio is greater than 5%, it will cause the weight of the intermediate shaft to increase significantly. In some weight-sensitive equipment, the heavy intermediate shaft will increase the overall load of the engine, reduce energy utilization efficiency, and affect the engine performance. During equipment operation, the weight of the intermediate shaft will generate a larger inertial force, especially during equipment start-stop and speed change, the change of the inertial force may cause vibration and impact of the coupling, affecting the stable operation of the equipment.

[0031] Secondly, the wall thickness ratio range of 3%-5% helps to improve the stability of the coupling during use. The stable structural strength of the intermediate shaft and the inner stop and the good assembly accuracy enable the coupling to effectively resist various interference forces during equipment operation and maintain stable power transmission.

[0032] Further, the size of the wall thickness d is in the range of 4-16 mm.

[0033] Beneficial effects: when the wall thickness d is in the range of 4-16 mm, a stable and reliable structural foundation can be built for the intermediate shaft and the inner stop. For common power transmission working conditions, this wall thickness is sufficient to enable the inner stop to effectively share the torque, vibration and impact with the intermediate shaft, so that the stress is evenly distributed.

[0034] The wall thickness range of 4-16 mm avoids the processing problems caused by too thin or too thick walls. Compared with a wall thickness of less than 4 mm, the problem of thin-walled structure deformation during processing and difficulty in ensuring dimensional accuracy does not occur. Compared with a wall thickness of more than 16 mm, the problem of the need for high-power equipment during processing, fast tool wear, hole deflection during boring and multiple processing does not occur, thereby effectively ensuring the smooth progress of the processing technology.

[0035] Further, the number of fixed bolts is A, the number of connecting bolts is a, and the ratio of a to A is in the range of 1 / 2-2 / 3.

[0036] Beneficial effects: The fixed bolts are mainly responsible for stably connecting the external components, and the connecting bolts play a key role in the connection between the intermediate shaft and the mounting flange. Within the ratio range, the synergistic effect of the two types of bolts can ensure that each component is evenly stressed and has good synchronicity when transmitting torque, effectively reducing energy loss during power transmission and improving the overall operation efficiency of the equipment. The fixed bolts and the connecting bolts form a stable stress system in the connection structure. When the equipment operates and generates external force, a reasonable number of fixed bolts can evenly transmit the stress of the external components to the mounting base, and the connecting bolts ensure the stable connection between the intermediate shaft and the mounting flange. Within the ratio range, the number of the two types of bolts cooperates with each other, so that the stress of the entire connection structure in each direction can be effectively dispersed, thereby enhancing the connection stability.

[0037] In addition, during the manufacturing process, a reasonable number of bolts reduces unnecessary material waste and reduces raw material costs. At the same time, due to the improved assembly convenience, the assembly time is shortened, and the labor cost is also reduced accordingly. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is an overall structure schematic diagram of the coupling of the embodiment of the utility model.

[0039] Figure 2 It is an overall structure schematic diagram of the internal component of the embodiment of the utility model.

[0040] Figure 3 It is an explosion structure schematic diagram of the internal component of the embodiment of the utility model.

[0041] Figure 4 It is a structure schematic diagram of the intermediate shaft of the embodiment of the utility model.

[0042] Figure 5 It is a structure schematic diagram of the mounting flange of the embodiment of the utility model. DETAILED DESCRIPTION

[0043] The following will be further described in detail through specific embodiments:

[0044] The reference signs in the drawings of the specification include: mounting flange 1, intermediate shaft 2, external spline 3, internal stop 4, external stop 5, transition layer 6, accommodating groove 7, connecting bolt 8, gasket 9, fixed flange 10, intermediate block 11, fastening block 12, fixed bolt 13.

[0045] The embodiment is basically as shown in the accompanying drawings: Figures 1-5

[0046] ​The spline shaft type coupling comprises an external member and an internal member, the internal member comprises a middle shaft 2 and a mounting flange 1, the middle shaft 2 and the mounting flange 1 are detachably connected; the other end of the middle shaft 2 is provided with an external spline 3, the internal member is internally provided with an internal spline, and the external member and the internal member are drivingly connected through the internal spline and the external spline 3.

[0047] The external member comprises a fixing flange 10, a middle block 11 and a fastening block 12, and the fixing flange 10, the middle block 11 and the fastening block 12 are provided with a fixed connection structure, the fixed connection structure comprises a plurality of fixed bolts 13 arranged in a ring shape and uniformly distributed; the middle shaft 2 is provided with a receiving groove 7 at the end of the external spline 3, and the fastening block 12 is matched with the receiving groove 7 to axially limit the internal member.

[0048] The middle shaft 2 and the mounting flange 1 are provided with a stop opening connection structure, the stop opening connection structure comprises an external stop opening 5 and an internal stop opening 4, the depth of the internal stop opening 4 is slightly greater than the protruding height of the external stop opening 5, the internal stop opening 4 is arranged on the middle shaft 2, the external stop opening 5 is arranged on the mounting flange 1 and is provided with a transition layer 6 between the external stop opening 5 and the mounting flange 1, the edge of the transition layer 6 is circularly transitioned to protect the stop opening connection structure between the mounting flange 1 and the middle shaft 2 and enhance the structural stability; the external stop opening 5 and the internal stop opening 4 are both provided with bolt holes, the bolt holes are provided with connecting bolts 8, the connecting bolts 8 are arranged in a ring shape and uniformly distributed around the axis of the middle shaft 2, the middle shaft 2 and the mounting flange 1 are detachably connected through the stop opening connection structure and the connecting bolts 8, and each connecting bolt 8 is provided with a gasket 9 to reduce the friction damage of the connecting bolt 8 to the internal member and prolong the service life of the bolt.

[0049] As shown in Figure 4 The external stop opening 5 protrudes from the mounting flange 1, the protruding height of the external stop opening 5 is h, the length of the middle shaft 2 except the external spline 3 is H, and the ratio of h to H is in the range of 4% to 6%. Preferably, the ratio of h to H in the embodiment is 5%, and the size of the protruding height h of the external stop opening 5 is in the range of 5 to 20 mm, that is, when the calculated value of h is less than 5 mm, h is 5 mm, and when the calculated value of h is greater than 20 mm, h is 20 mm.

[0050] The ratio of h to H is limited in the range of 4% to 6% by the above setting, on the one hand, the protruding part of the external stop opening 5 can build an extremely effective additional support structure at the connection part, which can efficiently share the external force such as vibration, impact and torque fluctuation transmitted by the middle shaft 2 under high load and complex working conditions such as continuous operation of large industrial equipment or operation of engineering machinery in rugged terrain; on the other hand, the protruding part of the external stop opening 5 provides a very clear and stable guide path for the internal stop opening 4, which can efficiently guide the middle shaft 2 to quickly align during the assembly process, and effectively resist the deviation caused by improper operation or external force interference.

[0051] As shown in Figure 5As shown, the diameter of the intermediate shaft 2 is D, the wall thickness between the inner stop 4 and the intermediate shaft 2 is d, and the ratio of d to D is in the range of 3% to 5%. Preferably, the ratio of d to D in the embodiment is 4%, and the wall thickness d is in the range of 4 to 16 mm, that is, when the calculated value of d is less than 4 mm, d is 4 mm, and when the calculated value of d is greater than 16 mm, d is 16 mm.

[0052] Under the above ratio range, when the intermediate shaft 2 is subjected to external forces such as torque, vibration and impact, the inner stop 4 can effectively share the load with the intermediate shaft 2 to evenly distribute the stress. Moreover, the wall thickness ratio range of 3% to 5% helps to improve the stability of the coupling during use, the stable structural strength of the intermediate shaft 2 and the inner stop 4, and the good assembly precision, so that the coupling can effectively resist various interference forces during equipment operation and maintain stable power transmission.

[0053] The number of fixing bolts 13 is A, the number of connecting bolts 8 is a, the ratio of a to A is in the range of 1 / 2 to 2 / 3, and the number of fixing bolts 13 and connecting bolts 8 is 8 to 16. Too few cannot guarantee the stability of the connection, and too many increases material waste. The above arrangement makes the ring-shaped distribution of the fixing bolts 13 and the connecting bolts 8 more synchronized and uniform, so as to ensure that each component is evenly stressed and has good synchronicity when transmitting torque, effectively reducing energy loss during power transmission and improving the overall operation efficiency of the equipment.

[0054] Through the above embodiment, when the internal components have problems, that is, the outer spline 3 part of the intermediate shaft 2 rubs against the spring leaf and causes wear, maintenance personnel can directly disassemble the intermediate shaft 2 from the mounting flange 1. Although different specifications of equipment correspond to different specifications of mounting flange 1, the intermediate shaft 2 is to some extent universally applicable, and the present scheme can use the same specification of intermediate shaft 2 that has been produced for repair and replacement, without the need to rework the entire internal components, greatly simplifying the maintenance process and improving the maintenance efficiency. At the same time, the damaged parts can be replaced individually, and the intermediate shaft 2 or the mounting flange 1 is a single component, and its manufacturing cost is much lower than the reworking cost of the entire internal components, thereby reducing the material procurement cost.

[0055] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application. The scope of protection claimed in the present application should be subject to the content of its claims, and the specific implementation in the specification can be used to explain the content of the claims.

Claims

1. A spline shaft type coupling characterized by: The outer member and the inner member include an intermediate shaft and a mounting flange, which are detachably connected; the other end of the intermediate shaft is provided with external splines, and the inner member is internally provided with internal splines; the outer member and the inner member are transmissionally connected through the cooperation of the internal splines and the external splines.

2. A spline shaft type coupling according to claim 1, characterized in that: The intermediate shaft and the mounting flange are provided with a stop connection structure, which includes an external stop and an internal stop, and a plurality of connection bolts are uniformly arranged between the external stop and the internal stop.

3. A spline shaft type coupling according to claim 1, characterized in that: The outer member includes a fixing flange, an intermediate block and a fastening block, and a fixing connection structure is arranged between the three, including a plurality of fixing bolts arranged in a ring shape and uniformly.

4. A spline shaft type coupling according to claim 2, characterized in that: The intermediate shaft is provided with a receiving groove at the end of the external splines, and the fastening block cooperates with the receiving groove to limit the inner member.

5. A spline shaft type coupling according to claim 4, characterized in that: The internal stop is arranged on the intermediate shaft, and the external stop is arranged on the mounting flange.

6. A spline shaft type coupling according to claim 5, characterized in that: The external stop protrudes from the mounting flange, and the protruding height of the external stop is h, the length of the intermediate shaft except the external splines is H, and the ratio of h to H is in the range of 4% to 6%.

7. A spline shaft type coupling according to claim 4, characterized in that: The protruding height h of the external stop is in the range of 5 to 20 mm.

8. A spline shaft type coupling according to claim 7, characterized in that: The diameter of the intermediate shaft is D, the wall thickness between the internal stop and the intermediate shaft is d, and the ratio of d to D is in the range of 3% to 5%.

9. A spline shaft type coupling according to claim 3, characterized in that: The wall thickness d is in the range of 4 to 16 mm. The number of the fixing bolts is A, the number of the connection bolts is a, and the ratio of a to A is in the range of 1 / 2 to 2 / 3.

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