High-speed heavy-load cross-shaped universal coupling

Abstract

The utility model discloses a high-speed heavy-load cross-shaped universal coupling which comprises a first connecting flange, a first cross-shaped bag, a second connecting flange, a second cross-shaped bag, a spline sleeve and a spline shaft assembly, the spline sleeve is connected with the spline shaft assembly, the other end of the spline sleeve is connected with the upper end and the lower end of the first cross-shaped bag, and the second cross-shaped bag is connected with the second cross-shaped bag. The left and right ends of the first cross bag are connected with the first connecting flange; the other end of the spline shaft assembly is connected with the upper end and the lower end of a second cross-shaped bag, and the left end and the right end of the second cross-shaped bag are connected with second connecting flanges. By the adoption of the structure, the cross-shaped universal coupling has good effects on the two aspects of heavy load and high speed.

Description

Technical Field

[0001] The utility model relates to the technical field of universal couplings, and more specifically to a high-speed and heavy-load cross universal coupling. Background Art

[0002] Universal couplings are important components for transmitting torque, and have high precision, strong load-bearing capacity, high speed, and certain angular displacement capabilities. Existing universal couplings cannot take into account both high speed and heavy load. Utility Model Content

[0003] The utility model aims to provide a high-speed heavy-load universal coupling, so as to solve the technical problems in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A high-speed and heavy-loaded universal cross coupling comprises: a first connecting flange, a first cross bag, a second connecting flange, a second cross bag, a spline sleeve, and a spline shaft, wherein the spline sleeve and the spline shaft are connected, the other end of the spline sleeve is connected to the upper and lower ends of the first cross bag, and the left and right ends of the first cross bag are connected to the first connecting flange; the other end of the spline shaft is connected to the upper and lower ends of the second cross bag, and the left and right ends of the second cross bag are connected to the second connecting flange.

[0006] In some embodiments, the first cross bag includes: an oil cup, a retaining ring, a bearing sleeve, a bearing, and a crosshead. The other end of the spline sleeve is connected to the upper and lower ends of the first cross bag, including installing the upper and lower ends of the crosshead into the first connecting flange, and then installing the bearing, bearing sleeve, retaining ring, and oil cup in sequence. The function of the retaining ring is to prevent radial movement of the crosshead, and the function of the oil cup is to add grease.

[0007] In some embodiments, the left and right ends of the first cross bag are connected to the first connecting flange, including installing the left and right ends of the crosshead into the other end of the spline shaft, and then installing the bearing, bearing sleeve, retaining ring, and oil cup in sequence. The function of the retaining ring is to prevent radial movement of the crosshead, and the function of the oil cup is to add grease.

[0008] In some embodiments, torque is transmitted through a rectangular spline pair consisting of a spline sleeve and a spline shaft, the spline pair is centered on the outer diameter of a 12-spline shaft, and torque is transmitted through the rectangular spline key side.

[0009] In some embodiments, the spline shaft is composed of a spline shaft, a tube, and a fork, which are heat-shrink-fitted and welded with an interference fit of 0.05-0.1 mm; a fluorescent ring band is designed next to the weld.

[0010] In some embodiments, grooves for placing balancing blocks are arranged on the outer circle composed of the spline sleeve and the spline shaft. The two side surfaces of the groove are configured as inclined surfaces to match the left balancing block and the right balancing block of the balancing block composition. The middle joint surface of the left and right balancing blocks is drilled and tapped and fastened with screws.

[0011] In some embodiments, the angles of the inclined surfaces on both sides of the groove are 10°; and the cross section of the groove is narrow at the top and wide at the bottom.

[0012] In some embodiments, the right end seal of the universal coupling is assembled on the right end face of the spline sleeve by positioning the sealing sleeve, bolts and nuts. The right end of the sealing sleeve has a sealing groove with an O-ring installed, and the inner hole of the O-ring slides on the outer circle of the spline shaft.

[0013] In some embodiments, the left end of the universal coupling is sealed by placing the end cover into the groove of the spline sleeve, tapping the edge and riveting it, so that the grease is sealed at the left end.

[0014] In some embodiments, the crosshead is made of 20CrMnTi, a die forging, and adopts a carburizing and quenching process. The carburizing layer depth is 1.2-1.6mm and the hardness is 56-60HRC. This ensures that the crosshead surface has sufficient strength and the toughness inside the crosshead is guaranteed; the spline sleeve is a die forging, made of 42CrMo, with a tempering hardness of 240-300HBS, which improves the strength of the spline sleeve as a whole.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] By adopting the structure of the utility model, the cross universal coupling can have better effects in both heavy load and high speed. The heavy-duty carrier now connects the main force-bearing parts of the flange, crosshead, spline sleeve, and spline shaft to improve the strength of the parts to improve the heavy-load performance of the coupling as a whole; the structure provided by the application can reduce the spline pair matching clearance of the spline shaft and the spline sleeve to achieve the high-speed performance of the universal coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a schematic structural diagram of a high-speed and heavy-loaded universal coupling according to the present embodiment;

[0018] Figure 2 It is a parts diagram of the first cross package of this embodiment;

[0019] Figure 3 is a schematic diagram of a first cross bag of this embodiment;

[0020] Figure 4 Schematic diagram of the spline sleeve and spline shaft of this embodiment;

[0021] Figure 5Schematic diagram of the spline shaft composition of this embodiment;

[0022] Figure 6 is a schematic diagram of the composition of the balancing block of this embodiment;

[0023] Illustration: 1-connecting flange, 2-connecting bolt M20x60, 3-nut M20, 4-retaining ring, 5-cross bag, 6-balance block assembly, 7-spline sleeve, 8-bolt M10x35, 9-nut M10, 10-sealing sleeve, 11-sealing O-ring, 12-spline shaft assembly, 14-end cover, 15-oil cup, 17-bearing sleeve, 18-bearing, 19-crosshead, 20-spline shaft, 21-tube, 22-fork, 23-left balance block, 24-right balance block, 25-screw, 26-fluorescent ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0029] The following will be combined Figure 1-Figure 6 , a high-speed heavy-loaded universal coupling according to the embodiment of the present application is described in detail. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0030] Embodiment 1:

[0031] See also Figure 1-Figure 6 A high-speed and heavy-loaded universal cross coupling comprises: a first connecting flange 1, a first cross bag 5, a second connecting flange, a second cross bag, a spline sleeve 7, and a spline shaft assembly 12, wherein the spline sleeve and the spline shaft assembly are connected, the other end of the spline sleeve is connected to the upper and lower ends of the first cross bag, and the left and right ends of the first cross bag are connected to the first connecting flange; the other end of the spline shaft assembly is connected to the upper and lower ends of the second cross bag, and the left and right ends of the second cross bag are connected to the second connecting flange.

[0032] The utility model uses two end connection flanges to be fixed by connecting bolts M20x60 2 and nuts M20 3 to transmit the power of the left end to the flange, transmit it to the spline sleeve through the first cross bag, transmit it to the spline shaft through the spline sleeve spline pair, and then transmit it to the second connection flange at the right end through the second cross bag, and then fix it by bolts and nuts. The power of the left end is transmitted to the right end flange. Due to the parallel mode, the input and output torques of the left and right ends can be transmitted without loss.

[0033] The first cross bag includes: an oil cup 15, a retaining ring 4, a bearing sleeve 17, a bearing 18, and a crosshead 19. The other end of the spline sleeve is connected to the upper and lower ends of the first cross bag, including installing the upper and lower ends of the crosshead into the first connecting flange, and then installing the bearing, the bearing sleeve, the retaining ring, and the oil cup in sequence. The function of the retaining ring is to prevent the radial movement of the crosshead, and the function of the oil cup is to add grease.

[0034] The left and right ends of the first cross bag are connected to the first connecting flange, including installing the left and right ends of the cross head into the other end of the spline shaft, and then installing the bearing, bearing sleeve, retaining ring, and oil cup in sequence, the retaining ring is used to prevent the radial movement of the cross head, and the oil cup is used to add grease. The assembly structure and sequence of the second cross bag are the same as those of the first cross bag.

[0035] The crosshead is made of 20CrMnTi, a die forging, and adopts carburizing and quenching technology. The carburizing layer depth is 1.2-1.6mm and the hardness is 56-60HRC. This ensures that the crosshead has sufficient strength and toughness.

[0036] In some embodiments, the torque is transmitted through a rectangular spline pair consisting of a spline sleeve and a spline shaft. The spline sleeve is a die forging made of 42CrMo with a quenched and tempered hardness of 240-300HBS, thus ensuring the strength requirements of the spline sleeve.

[0037] The spline pair is centered on the outer diameter of the spline shaft to ensure smooth operation, and the torque is transmitted on the rectangular spline key side. The spline specifications are 10 (teeth)-125 (outer diameter) x102 (inner diameter) x18 (key width).

[0038] The spline shaft of the utility model is composed of a spline shaft 20, a tube 21 and a fork 22 (all made of 40Cr) which are heat-fitted and welded with an interference fit of 0.05-0.1mm, thereby ensuring strength requirements and reducing weight, which is particularly important in high-speed and heavy-loaded universal couplings.

[0039] The spline part is tempered and milled, and then high-frequency treated, with a hardness of 45-55HRC to ensure the strength and wear resistance of the spline part.

[0040] In addition, in order to facilitate maintenance observation or inspection of weld quality, a fluorescent ring band 26 is designed 5 mm next to the weld to facilitate later use and maintenance, greatly improve visibility, and be able to promptly detect weld quality problems to prevent major accidents.

[0041] In some embodiments, a groove for placing the balancing block assembly 6 is arranged on the outer circle of the spline sleeve and the spline shaft, and the two side surfaces of the groove are configured as inclined surfaces to match the left balancing block 23 and the right balancing block 24 of the balancing block assembly. The middle joint surface between the left and right balancing blocks is drilled and tapped, and fastened by screws 25.

[0042] In some embodiments, the angles of the inclined surfaces on both sides of the groove are 10°; and the cross section of the groove is narrow at the top and wide at the bottom.

[0043] In some embodiments, the outer circle composed of the spline sleeve and the spline shaft of the utility model is provided with a groove for placing the balance block. The two sides of the groove are turned into a 10° inclined surface and the left balance block and the right balance block composed of the balance block. The middle joint surface of the left and right balance blocks is drilled and tapped M10-7H. After the screws are tightened, the lower end is pressed against the inner and outer circles of the groove composed of the spline sleeve or the spline shaft. The tighter the pressing, the more the left and right balance blocks will move upward, and the left and right balance blocks will be tightly fitted on the inclined surface without loosening. This combined balance block is very convenient for later debugging and maintenance, and can avoid the occurrence of cracks due to stress concentration caused by welding. At the same time, it is convenient and reliable to disassemble. In some embodiments, the crosshead is made of 20CrMnTi, a die forging, using a carburizing and quenching process, with a carburizing layer depth of 1.2-1.6mm and a hardness of 56-60HRC; the spline sleeve is a die forging, made of 42CrMo, with a quenching and tempering hardness of 240-300HBS.

[0044] The right end seal of the utility model is assembled on the right end face of the spline sleeve by positioning the sealing sleeve 10, bolt M10x35 8, and nut M10 9. The right end of the sealing sleeve has a sealing groove, which is equipped with an O-ring 11. The inner hole of the O-ring slides on the outer circle of the spline shaft to seal the grease. This structure avoids the possibility of leakage and environmental pollution caused by rectangular rubber seals, and is more reliable and durable. The left end seal of the utility model is placed in the groove of the spline sleeve by placing the end cover 14, knocking the edge and riveting it, so that the grease is sealed at the left end.

[0045] The technical parameters of the cross universal coupling are as follows:

[0046] Rated torque: 40000N.m

[0047] Maximum speed: 2600r / min

[0048] Length: 2000±50mm;

[0049] Ambient temperature: -25℃~+50℃

[0050] Relative humidity: ≤100%

[0051] Altitude: ≤2000m

[0052] Able to withstand wind, salt spray, dust, etc.

[0053] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed and heavy-load universal coupling, characterized in that: include: The first connecting flange, the first cross bag, the second connecting flange, the second cross bag, the spline sleeve and the spline shaft are composed, wherein the spline sleeve and the spline shaft are connected, the other end of the spline sleeve is connected to the upper and lower ends of the first cross bag, and the left and right ends of the first cross bag are connected to the first connecting flange; the other end of the spline shaft is connected to the upper and lower ends of the second cross bag, and the left and right ends of the second cross bag are connected to the second connecting flange; The first cross pack includes: an oil cup, a retaining ring, a bearing sleeve, a bearing, and a cross head. The other end of the spline sleeve is connected to the upper and lower ends of the first cross pack. The retaining ring is used to prevent the radial movement of the cross head. The oil cup is used to add grease. The left and right ends of the first cross pack are connected to the first connecting flange, the retaining ring is used to prevent the radial movement of the cross head, and the oil cup is used to add grease; The torque is transmitted through a rectangular spline pair consisting of a spline sleeve and a spline shaft. The spline pair is centered on the outer diameter of the 12-spline shaft and the torque is transmitted through the rectangular spline key side. The outer circle composed of the spline sleeve and the spline shaft is provided with a groove for placing the balancing blocks. The two side surfaces of the groove are configured as inclined surfaces to match the left balancing block and the right balancing block of the balancing block. The middle joint surface of the left and right balancing blocks is drilled and tapped and fastened by screws.

2. A high-speed and heavy-load universal coupling according to claim 1, characterized in that: The angles of the inclined surfaces on both sides of the groove are 10°; the cross section of the groove is narrow at the top and wide at the bottom.

3. The high-speed and heavy-load universal coupling according to claim 1, characterized in that: The right end seal of the universal coupling is positioned and assembled on the right end face of the spline sleeve through a sealing sleeve, bolts and nuts. The right end of the sealing sleeve is provided with a sealing groove, which is equipped with an O-ring, and the inner hole of the O-ring slides on the outer circle of the spline shaft.

4. The high-speed and heavy-load universal coupling according to claim 1, characterized in that: The left end of the universal coupling is sealed by placing the end cover into the groove of the spline sleeve, tapping the edge and riveting it, so that the grease is sealed at the left end.

5. The high-speed and heavy-load universal coupling according to claim 1, characterized in that: The crosshead is made of 20CrMnTi, and the die forging of the crosshead adopts carburizing and quenching process, with a carburizing layer depth of 1.2-1.6mm and a hardness of 56-60HRC; the spline sleeve is a die forging, made of 42CrMo, with a quenching and tempering hardness of 240-300HBS.

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