Coupling device

Abstract

The utility model provides a coupling device, which comprises an inner disc sleeved on the periphery of a spline shaft and in key connection with the spline shaft, and is characterized in that a locking taper sleeve is further fixed on the end face of one side of the inner disc close to the spline shaft, and the inner disc is fixedly connected with the locking taper sleeve through a fixing piece; an inner disc in the prior art is divided into the inner disc and the locking taper sleeve, the inner disc and the locking taper sleeve are in interference fit, the inner disc and the locking taper sleeve are extruded to enable a conical boss of the inner disc to deform through a formed notch, and therefore a spline in the inner disc tightly holds a spline shaft of a motor, and the inner disc cannot axially move on the spline shaft. And the gear backlash is eliminated to a certain extent, so that the impact and abrasion of the spline are favorably reduced, and the service life is prolonged. The transmission torque is transmitted through the spline integrated with the inner disc, safety and reliability are achieved, the axial size of the integrated inner disc during installation is greatly reduced, and the size and the weight of a transmission system can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings between an engine or motor output end and a gearbox input end, and specifically relates to a coupling device. Background Art

[0002] Elastic couplings are widely used in power systems in engineering machinery, vehicles, ships and other fields. They are installed at the output end of the engine. Their functions include: transmitting torque; adjusting the torsional vibration characteristics of the transmission shaft system; compensating for the center displacement of the master and slave shafts caused by vibration and impact; buffering and absorbing vibrations, etc. Therefore, elastic couplings can achieve the purpose of vibration reduction and noise reduction, thereby protecting the operating reliability of the master and slave motors and the entire transmission device.

[0003] Elastic couplings can be classified according to their structure and materials, such as: spring couplings, rubber couplings, elastic pin couplings, elastic sheet couplings, etc.

[0004] like Figure 1 As shown, the existing rubber coupling is mainly composed of an inner disc A1, an outer disc A2, a rubber block A3, a pressure plate A5, etc. The outer disc A2 is assembled on the engine flywheel A7 through a flange A6 and rotates with the flywheel. The inner disc A1 is installed on the gearbox or the range-extending generator spline shaft A4 through the axial spline hole A11 and is pressed by the pressure plate A5, so that the inner disc A1 will not move axially on the spline shaft. The rubber block is embedded in the cavity between the outer disc and the inner disc. When working, the outer disc rotates with the flywheel, and the torque is transmitted to the inner disc through the rubber block. The inner disc drives the gearbox or generator to rotate through the spline engagement to achieve torque transmission.

[0005] In the existing structure, the pressure plate and bolts that tighten the inner disc occupy a large axial space, making the overall size of the transmission system assembly larger, which is not conducive to the layout of the vehicle. In addition, in the existing structure, the inner disc spline and the spline shaft are clearance-matched, and there is a certain tooth side clearance, which is easy to wear the spline during operation and may cause abnormal noise.

[0006] Therefore, there is an urgent need to provide a coupling device to solve the defects and shortcomings in the above-mentioned prior art. Utility Model Content

[0007] In order to solve the defects and shortcomings in the prior art, the utility model provides a coupling device.

[0008] The technical solution provided by the utility model is as follows:

[0009] A coupling device includes an inner disk, which is outermostly arranged on the outer circumference of a spline shaft and is key-connected thereto. The invention is characterized in that a locking cone sleeve is fixed to the end surface of the inner disk close to the spline shaft, and the inner disk and the locking cone sleeve are fixedly connected by a fixing member.

[0010] As a further preferred embodiment of the present invention, a boss is protruding from one side of the inner disk close to the spline shaft, and the outer edge of the boss is tapered.

[0011] As a further preferred embodiment of the present invention, the inner wall of the boss is provided with an internal spline corresponding to the spline shaft.

[0012] As a further preferred embodiment of the present invention, a notch is provided on the outer wall of the boss.

[0013] As a further preferred embodiment of the present invention, the notch passes through the outer wall of the boss.

[0014] As a further preferred embodiment of the present invention, the notch is radially arranged or inclined relative to the axial direction of the boss.

[0015] As a further preferred embodiment of the utility model, a receiving groove is provided between the outer edge of the boss and the inner disk, the axial portion of the locking cone sleeve is located in the receiving groove, and the outer edge of the locking cone sleeve corresponds to the inner wall of the receiving groove.

[0016] As a further preferred embodiment of the present invention, the inner wall of the axial center hole of the locking cone sleeve is configured to be a cone that matches the outer edge of the boss.

[0017] As a further preferred embodiment of the present invention, the locking cone sleeve is sleeved on the outer periphery of the boss and has an interference fit therewith.

[0018] As a further preferred embodiment of the utility model, a plurality of inner disk mounting holes are evenly opened at the bottom of the accommodating groove along the circumferential direction, a plurality of cone sleeve mounting holes are evenly opened at the outer edge of the locking cone sleeve along the circumferential direction, the inner disk mounting holes correspond to the positions of the cone sleeve mounting holes, and the fixing piece passes through the inner disk mounting holes and the cone sleeve mounting holes to realize a fixed connection between the inner disk and the locking cone sleeve.

[0019] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0020] 1) The utility model provides a coupling device, which is achieved by splitting the inner disk in the prior art into an inner disk and a locking cone sleeve, and by using the interference fit between the inner disk and the locking cone sleeve, and by using the slots provided, the inner disk conical boss is deformed by extrusion, so that the inner spline of the inner disk tightly holds the motor spline shaft, so that the inner disk will not move axially on the spline shaft; and the tooth side clearance is eliminated to a certain extent, which is beneficial to reducing the impact and wear of the spline and improving the service life. The transmission torque is transmitted through the spline integrated with the inner disk, which is safe and reliable, greatly reducing the axial size of the integrated inner disk when installed, and is beneficial to reducing the size and weight of the transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a coupling device in the prior art.

[0022] Figure 2 It is a structural schematic diagram of an integrated inner disk in the prior art.

[0023] Figure 3 This is a structural explosion diagram of the coupling device provided by the utility model.

[0024] Figure 4 A side sectional view of the coupling device provided by the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] [First embodiment]

[0029] like Figure 3-4 The figure shows a coupling device provided by the first embodiment of the utility model, including an inner plate 1, which is outermostly arranged on the outer periphery of a spline shaft 4 and is key-connected thereto. The improvement of this embodiment compared with the prior art is that a locking cone sleeve 2 is also fixed to the end face of the inner plate 1 close to the spline shaft 4, and the inner plate 1 and the locking cone sleeve 2 are fixedly connected by a fixing member 3.

[0030] like Figure 3-4 As shown, a boss 11 is protruding from one side of the inner disk 1 close to the spline shaft 4, and an inner spline 12 corresponding to the spline shaft 4 is provided on the inner wall of the boss 11, and the outer edge of the boss 11 is tapered; correspondingly, the inner wall of the axial hole 21 of the locking cone sleeve 2 is set to be tapered to match the outer edge of the boss 11, and the locking cone sleeve 2 is fitted on the outer periphery of the boss 11 and has an interference fit with it. The inner wall taper of the axial hole 21 of the locking cone sleeve 2 and the outer edge taper of the tapered boss 11 of the inner disk 1 are preferably the same taper, but the inner wall small end diameter of the axial hole 21 of the cone sleeve 2 can be set to be smaller than the small end diameter of the outer edge of the tapered boss 11 of the inner disk 1, so as to achieve an interference fit with this structure.

[0031] By splitting the inner disk in the prior art into an inner disk and a locking cone sleeve, the inner disk and the locking cone sleeve are interferingly fit, and the inner splines 12 of the inner disk are squeezed to hold the motor spline shaft 4, so that the inner disk 1 will not move axially on the spline shaft 4.

[0032] As a further preference of this embodiment, a notch 13 is provided on the outer wall of the boss 11, through which the conical boss can be deformed when the locking cone sleeve 2 squeezes the inner disk 1 so that the inner spline of the inner disk can hold the motor spline shaft more tightly, thereby further improving the fixing and positioning effect.

[0033] like Figure 3-4 As shown, the slot 13 in this embodiment passes through the outer wall of the boss 11, and the slot 13 is radially arranged or inclined relative to the axial direction of the boss 11. The radial arrangement is convenient for processing and forming, while the axial inclined arrangement can increase the length of the slot 13 to further improve the degree of deformation, thereby improving the fixing and positioning effect.

[0034] like Figure 3 As shown, a receiving groove 15 is provided between the outer edge of the boss 11 and the inner disk 1, the axial portion of the locking cone sleeve 2 is located in the receiving groove 15, and the outer edge of the locking cone sleeve 2 corresponds to the inner wall of the receiving groove 15, so that the axial and radial positioning of the locking cone sleeve 2 on one side of the inner disk 1 can be easily achieved through the receiving groove 15.

[0035] A plurality of inner disk mounting holes 14 are evenly arranged along the circumferential direction at the bottom of the accommodating groove 15, and a plurality of cone sleeve mounting holes 22 are evenly arranged along the circumferential direction at the outer edge of the locking cone sleeve 2. The positions of the inner disk mounting holes 14 and the cone sleeve mounting holes 22 correspond to each other. After the fixing member 3 passes through the inner disk mounting holes 14 and the cone sleeve mounting holes 22, a fixed connection between the inner disk 1 and the locking cone sleeve 2 is realized.

[0036] During assembly, firstly, the locking cone sleeve 2 is placed on the outer periphery of the spline shaft 4, and then the inner disc 1 is placed on the spline shaft 4 and inserted into the axial center hole 21 of the locking cone sleeve 2. The inner disc 1 is pushed axially to the root of the spline shaft 4, and the chamfer at the end of the inner spline 12 of the inner disc 1 will hit the chamfer of the back cut groove of the spline shaft 4 to form axial positioning. Then, the fixing member 3 (such as a fastening bolt can be selected) is inserted and tightened. During the tightening process, since the inner disc 1 and the locking cone sleeve 2 are interference fit, and the outer wall of the boss 11 is provided with a notch 13, the conical boss 11 of the inner disc 1 is deformed by extrusion, so that the inner spline 12 of the inner disc 1 will hold the motor spline shaft 4 tightly, so that the inner disc 1 will not move axially on the spline shaft 4; and the tooth side clearance is eliminated to a certain extent, which is conducive to reducing the impact and wear of the spline and improving the service life. At the same time, the transmission torque is transmitted through the spline integrated with the inner disc, which is safe and reliable.

[0037] When disassembling, first remove the fixing part 3 that fixes the inner disk 1 and the locking cone sleeve 2, and then screw the bolt into the ejection threaded hole of the inner disk 1. As the bolt is tightened, the bolt presses against the locking cone sleeve 2 to separate the two.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A coupling device, comprising an inner disc (1), the inner disc (1) being externally mounted on the outer circumference of a spline shaft (4) and being key-connected thereto, characterized in that: A locking cone sleeve (2) is also fixed to the end surface of the inner disc (1) on the side close to the spline shaft (4), and the inner disc (1) and the locking cone sleeve (2) are fixedly connected via a fixing member (3).

2. A coupling device according to claim 1, characterized in that: A boss (11) is protrudingly provided on one side of the inner disc (1) close to the spline shaft (4), and the outer edge of the boss (11) is tapered.

3. A coupling device according to claim 2, characterized in that: The inner wall of the boss (11) is provided with an internal spline (12) corresponding to the spline shaft (4).

4. A coupling device according to claim 2, characterized in that: The outer wall of the boss (11) is provided with a notch (13).

5. A coupling device according to claim 4, characterized in that: The notch (13) passes through the outer wall of the boss (11).

6. A coupling device according to claim 4, characterized in that: The notch (13) is arranged radially or inclined relative to the axial direction of the boss (11).

7. A coupling device according to claim 2, characterized in that: An accommodating groove (15) is provided between the outer edge of the boss (11) and the inner disk (1), the axial portion of the locking cone sleeve (2) is located in the accommodating groove (15), and the outer edge of the locking cone sleeve (2) corresponds to the inner wall of the accommodating groove (15).

8. A coupling device according to claim 2, characterized in that: The inner wall of the axial center hole (21) of the locking cone sleeve (2) is arranged to be a cone that matches the outer edge of the boss (11).

9. A coupling device according to claim 8, characterized in that: The locking cone sleeve (2) is externally mounted on the outer periphery of the boss (11) and is interference fit therewith.

10. A coupling device according to claim 7, characterized in that: The bottom of the accommodating groove (15) is uniformly provided with a plurality of inner disk mounting holes (14) along the circumferential direction, and the outer edge of the locking cone sleeve (2) is uniformly provided with a plurality of cone sleeve mounting holes (22) along the circumferential direction. The positions of the inner disk mounting holes (14) and the cone sleeve mounting holes (22) correspond to each other. After the fixing member (3) passes through the inner disk mounting holes (14) and the cone sleeve mounting holes (22), a fixed connection between the inner disk (1) and the locking cone sleeve (2) is achieved.

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