C-shaped universal coupling capable of being quickly disassembled and assembled

Abstract

The invention discloses a C-shaped universal coupling capable of being rapidly disassembled and assembled in the technical field of couplings. The C-shaped universal coupling comprises a transmission shaft assembly, cross shaft assemblies connected to the two ends of the transmission shaft assembly and flange plate assemblies connected to the cross shaft assemblies. The cross shaft assembly comprises a cross joint and positioning sleeves movably arranged at the four ends of the cross joint in a sleeving mode, a pair of positioning sleeves located on the diagonal line is fixedly connected with the transmission shaft assembly, and the other pair of positioning sleeves located on the diagonal line is fixedly connected with the corresponding flange plate assembly. In the assembling process, the flange plate assembly and the external flange plate assembly are fixedly installed at first, then the transmission shaft assembly and the cross shaft assembly are assembled, and finally the assembly body of the transmission shaft assembly and the cross shaft assembly and the flange plate assembly are fixedly installed; disassembly, assembly and maintenance can be facilitated, the risk that the fixing bolts loosen and fall off is reduced, and the labor cost and the use cost can also be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of couplings, and in particular to a C-type universal coupling that can be quickly disassembled and assembled. Background Art

[0002] In the vehicle's transmission system, universal couplings can be used to connect the vehicle drive axle with powertrain gearbox and other components to transmit torque and compensate for axial, radial or angular deviations. Traditional universal couplings often adopt a cross-axis structure, and the installation and disassembly process is cumbersome, especially in small spaces and complex structures, making it difficult to achieve convenient installation and disassembly.

[0003] In order to prevent the flange fixing bolts from loosening and falling off, Figure 1 As shown, the flange fixing bolts on many components that need to be connected by universal couplings on the market are usually included with the flanges at the factory and cannot be removed. Due to the presence of bolts on the flanges at both ends, the installation size requirements for the universal coupling are more stringent. When the universal coupling is used in a narrow space, the expansion and contraction of the coupling is small. The shortened universal coupling interferes with the bolts on the external flange and cannot be directly installed. During installation, it is usually necessary to first fix the input end component on the frame, and then fix the flange at one end of the universal coupling to the input end flange first, and then lift the output end component, and fix the output end flange with its own bolts to the other end of the coupling flange. Installation, disassembly and maintenance are extremely inconvenient, time-consuming and labor-intensive. In addition, due to the influence of the narrow space, the torque socket wrench cannot be used, and only an ordinary wrench can be used for tightening. The torque cannot be guaranteed, and there is a safety hazard of loosening and falling off. When a certain structure of the coupling fails, it is usually necessary to replace the entire coupling, and a single structure cannot be replaced separately, resulting in unnecessary cost increases. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a C-type universal coupling that can be quickly disassembled and assembled, which not only facilitates disassembly and assembly and maintenance, reduces the risk of loosening and falling off of the fixing bolts, but also reduces labor costs and use costs.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions: The present invention provides a C-type universal coupling that can be quickly disassembled and assembled, comprising a transmission shaft assembly, a cross shaft assembly connected to both ends of the transmission shaft assembly, and a flange assembly connected to each of the cross shaft assemblies; the cross shaft assembly comprises a cross member and positioning sleeves movably sleeved on four ends of the cross member, a pair of the positioning sleeves on the diagonal line is fixedly connected to the transmission shaft assembly, and another pair of the positioning sleeves on the diagonal line is fixedly connected to the corresponding flange assembly.

[0006] Optionally, the cross member includes a node body and a journal arranged on the node body in a cross shape, a needle bearing is sleeved on the journal, and the positioning sleeve is sleeved on the needle bearing.

[0007] Optionally, an oil filling nozzle is provided on the joint body, an oil outlet nozzle is provided on the shaft neck, and a lubricating oil channel connecting the oil filling nozzle and the oil outlet nozzle is provided in the cross-section; a sleeve seal and an oil seal are sequentially sleeved on the root of the shaft neck, and the oil seal abuts against the opening of the positioning sleeve.

[0008] Optionally, the transmission shaft assembly and the flange assembly are both provided with a C-shaped yoke on one side relative to the cross shaft assembly, and the C-shaped yoke and the corresponding positioning sleeve are fixedly connected by bolts and screw holes.

[0009] Optionally, two mounting holes are symmetrically arranged on both sides of the positioning sleeve, the screw hole is arranged on the C-shaped yoke, and the mounting hole and the screw hole are arranged opposite to each other; the bolt passes through the mounting hole from one side of the positioning sleeve and is fixedly connected to the screw hole on the C-shaped yoke.

[0010] Optionally, at least two pairs of connection holes are rotationally symmetrically arranged on the flange assembly along its axis, and the connection holes are used for fixing the flange assembly to an external flange assembly via bolts and nuts.

[0011] Optionally, the bolts are coated with thread tightening glue and spring washers are placed during assembly.

[0012] Optionally, the bolts are tightened with a fixed torque in diagonal order during assembly.

[0013] Optionally, the C-shaped yoke and the relative positioning sleeve are also positioned and connected via a concave stop and a convex stop.

[0014] Optionally, the transmission shaft assembly includes a spline shaft and a spline sleeve that are matched and connected, a protective sleeve is provided at the connection between the spline shaft and the spline sleeve, and an oil filling port is provided on the protective sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a C-type universal coupling that can be quickly disassembled and assembled. During assembly, the flange assembly is first fixedly installed with the external flange assembly, and then the transmission shaft assembly and the cross shaft assembly are assembled. Finally, the assembly of the transmission shaft assembly and the cross shaft assembly is fixedly installed with the flange assembly. Based on reasonable structural design and installation sequence, the installation space of each installation step is sufficient, the tightening torque of the flange fixing bolts can be guaranteed, and the safety hazard of loosening and falling of the fixing bolts can be reduced. At the same time, the complexity of manual operation is reduced, time and labor are saved, and labor costs are saved. The various components are connected by bolts and can be quickly disassembled and assembled. When a certain structure in the coupling fails, the failed structure can be replaced separately, saving the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a flange assembly provided by the background technology of the present invention and provided with fixing bolts when shipped from the factory; Figure 2 It is a schematic structural diagram of a C-type universal coupling that can be quickly disassembled and assembled provided by an embodiment of the present invention; Figure 3 1 is an exploded schematic diagram of a C-type universal coupling that can be quickly disassembled and assembled provided by an embodiment of the present invention; Figure 4 is an exploded schematic diagram of a cross shaft assembly provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of a transmission shaft assembly provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of assembling a C-type universal coupling that can be quickly disassembled and assembled provided by an embodiment of the present invention; The markings in the figure are: 1. Transmission shaft assembly; 11. Spline shaft; 12. Spline sleeve; 13. Protective sleeve; 14. Oil filling port; 2. Cross shaft assembly; 21. Cross head; 22. Positioning sleeve; 23. Needle roller bearing; 24. Grease nozzle; 25. Sleeve seal; 26. Oil seal; 27. Mounting hole; 3. Flange assembly; 31. Screw hole; 32. Connecting hole; 33. Concave stopper; 34. Concave stopper; 4. External flange assembly. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1:

[0019] like Figures 1 to 5As shown, an embodiment of the present invention provides a C-type universal coupling that can be quickly disassembled and assembled, including a transmission shaft assembly 1, a cross shaft assembly 2 connected to both ends of the transmission shaft assembly 1, and a flange assembly 3 connected to each cross shaft assembly 2; the cross shaft assembly 2 includes a cross member 21 and positioning sleeves 22 movably mounted on the four ends of the cross member 21, a pair of positioning sleeves 22 on the diagonal line is fixedly connected to the transmission shaft assembly 1, and another pair of positioning sleeves 22 on the diagonal line is fixedly connected to the corresponding flange assembly 3.

[0020] Specifically in this embodiment, the cross 21 includes a joint body and a journal arranged on the joint body in a cross shape, a needle bearing 23 is sleeved on the journal, and a positioning sleeve 22 is sleeved on the needle bearing 23. The needle bearing 23 can withstand a higher load due to its slender rollers and large number. At the same time, the radial structure is compact, so that when its inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest. It is particularly suitable for support structures with limited radial installation dimensions. The needle bearing 23 is applied between the positioning sleeve 22 and the cross 21, which can make the structure compact while ensuring sufficient load capacity and reduce the overall volume occupied by the universal coupling.

[0021] The joint body is provided with an oil injection nozzle 24, the journal is provided with an oil outlet nozzle, and the cross section 21 is provided with a lubricating oil passage connecting the oil injection nozzle 24 and the oil outlet nozzle; the root of the journal is sleeved with a sleeve seal 25 and an oil seal 26 in sequence, and the oil seal 26 abuts against the opening of the positioning sleeve 22. During installation, the sleeve seal 25, the oil seal 26, the needle roller bearing 23, and the positioning sleeve 22 are sequentially installed on the journal of the cross section 21 in sequence, and the lubricating oil can be injected into the cross section 21 from the oil injection nozzle and flow to the surface of the journal to lubricate the needle roller bearing 23. In order to prevent the lubricating oil from flowing out and dust from entering the needle roller bearing 23, the sleeve seal 25 and the oil seal 26 are sleeved on the journal of the cross section 21 to play a sealing and protective role.

[0022] The transmission shaft assembly 1 and the flange assembly 3 are both provided with a C-shaped yoke on one side relative to the cross shaft assembly 2, and the C-shaped yoke and the relative positioning sleeve 22 are fixedly connected by bolts and screw holes. The C-shaped yoke and the relative positioning sleeve are also positioned and connected by a concave stop 33 and a convex stop 34. In an optional embodiment, the concave stop 33 is provided on the C-shaped yoke, and the convex stop 34 is provided on the positioning sleeve 22; in another optional embodiment, the convex stop 34 is provided on the C-shaped yoke, and the concave stop 33 is provided on the positioning sleeve 22.

[0023] Specifically in this embodiment, the cross shaft assembly 2 can be quickly positioned and installed with the flange assembly 3 of the driving and driven ends and the recessed stop 33 on the transmission shaft assembly 1 through the convex stop 34 of the positioning sleeve 22 thereon, which is convenient for installation and disassembly, saving time and effort.

[0024] Two mounting holes 27 are symmetrically arranged on both sides of the positioning sleeve 22, and the screw hole 31 is arranged on the C-shaped yoke, and the mounting holes 27 and the screw holes 31 are arranged opposite to each other; the bolt passes through the mounting holes 27 from one side of the positioning sleeve 22 and is fixedly connected to the screw holes 31 on the C-shaped yoke. In other optional embodiments, the number of mounting holes 27 and screw holes 31 can be increased or decreased as needed, and at the same time, the positions of the mounting holes 27 and the screw holes 31 can be interchanged as needed, that is, the mounting holes 27 are arranged on the C-shaped yoke, and the screw holes 31 are arranged on the positioning sleeve 22.

[0025] At least two pairs of connection holes 32 are rotationally symmetrically arranged on the flange assembly 3 along its axis. The connection holes 32 are used for fixing the flange assembly 3 with an external flange assembly 3 by bolts and nuts.

[0026] Specifically in this embodiment, one side of the flange assembly 3 is a flange structure, the structural type is matched according to the model of the external flange assembly 3, and four through holes are opened on it for fixed connection with the external flange assembly 3, and the other side is a C-shaped yoke, and a concave stopper 33 is opened in the middle of the C-shaped yoke, which is used for rapid positioning and installation with the convex stopper 34 on the positioning sleeve 22 in the cross shaft assembly 2. Two screw holes are opened on both sides of the C-shaped yoke, which are respectively connected and fastened with the mounting holes 27 on both sides of the positioning sleeve 22 through spring washers and bolts. When there is a power take-off device around the flange assembly 3, the length of the flange structure can be extended to form a variable diameter structure to avoid the power take-off device.

[0027] The transmission shaft assembly 1 comprises a spline shaft 11 and a spline sleeve 12 which are matched and connected. A protective sleeve 13 is sleeved at the connection between the spline shaft 11 and the spline sleeve 12 , and an oil filling port 14 is arranged on the protective sleeve 13 .

[0028] Specifically in this embodiment, One side of the spline shaft 11 is a spline shaft body, and the other side is a C-shaped yoke. A concave stopper 33 is provided in the middle of the C-shaped yoke for quick positioning and installation with a convex stopper 34 on the positioning sleeve 22 in the cross shaft assembly 2. Two screw holes are provided on both sides of the C-shaped yoke for fastening and connection with the mounting holes 27 on both sides of the positioning sleeve 22 through spring washers and bolts. One side of the spline sleeve 12 is a spline sleeve body, and the other side is a C-shaped yoke. A concave stopper 33 is provided in the middle of the C-shaped yoke for quick positioning and installation with a convex stopper 34 on the positioning sleeve 22 in the cross shaft assembly 2. Two screw holes are provided on both sides of the C-shaped yoke for fastening and connection with the mounting holes 27 on both sides of the positioning sleeve 22 through spring washers and bolts. After the spline shaft 11 and the spline sleeve 12 are connected, they have a certain amount of expansion and contraction. A protective sleeve 13 is installed at the connection to play a sealing and protective role. The oil filling port 14 is used to fill the transmission shaft assembly 1 with lubricating oil for lubrication.

[0029] like Figure 6As shown, the assembly steps of the C-type universal coupling that can be quickly disassembled and assembled provided by the present invention are as follows: Step S1. Apply thread fastener to the bolts of the external flange assembly at the input end. Then insert the four through holes on the flange structure of the active end flange assembly into the bolts of the external flange assembly at the input end. First, tighten the anti-loosening nuts in diagonal order with a wrench. At this time, there is plenty of installation space. Tighten them with a torque socket wrench according to the specified torque to reduce the risk of the bolts loosening and falling off.

[0030] Step S2, apply thread fastener on the bolts of the output end external flange assembly, then insert the four through holes on the flange structure of the driven end flange assembly into the bolts of the output end external flange assembly, first tighten the anti-loosening nuts in diagonal order with a wrench. At this time, there is plenty of installation space, and tighten them with a torque socket wrench according to the specified torque to reduce the risk of the bolts loosening and falling off.

[0031] Step S3, fill the cross-shaft assembly and the drive shaft assembly with grease through the grease nozzle of the cross-shaft assembly and the grease filling port of the drive shaft assembly, then quickly align the cross-shaft assembly with the concave stop on the C-type yoke in the drive shaft assembly through the positioning convex stop on its positioning sleeve and install it, then apply thread fastener on the bolt, insert the elastic washer into the mounting hole of the positioning sleeve and the C-type yoke screw hole on the drive shaft assembly, first tighten it diagonally with a wrench, and then tighten it with a torque socket wrench to the specified torque.

[0032] Step S4, after the assembly of the transmission shaft assembly and the cross shaft assembly is completed, quickly align the convex stop on the locating sleeve in the assembly with the concave stop in the C-type universal joint fork on the active end flange assembly and the driven end flange assembly, then apply thread fastener on the bolt, add elastic washers and insert them into the mounting holes of the locating sleeve and the screw holes on the C-type yoke of the active and driven end flanges, first tighten diagonally with a wrench, and then tighten with a torque socket wrench according to the specified torque. At this time, the quick disassembly and assembly C-type universal coupling is installed.

[0033] When the coupling needs to be disassembled for maintenance and replacement of faulty parts, first refer to the above step S4 to disassemble the drive shaft assembly and the cross shaft assembly, and then refer to steps S2 and S1 to disassemble the driven end flange assembly and the active end flange assembly from the output end and input end flanges. At this time, the coupling is disassembled.

[0034] When the universal coupling is disassembled and assembled according to the above method, even if the universal coupling is used in a narrow space, the fixing bolts can obtain a larger installation space, thereby ensuring the tightening torque of the bolts and reducing the risk of the bolts loosening and falling off. The installation and disassembly process is simple, saving time, effort and labor costs. When a structure in the universal coupling fails, the failed structure can also be replaced separately, saving the use cost.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, 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, 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 indirectly connected 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 by specific circumstances.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A C-type universal coupling that can be quickly disassembled and assembled, characterized in that: It includes a transmission shaft assembly, a cross shaft assembly connected to both ends of the transmission shaft assembly, and a flange assembly connected to each of the cross shaft assemblies; the cross shaft assembly includes a cross member and positioning sleeves movably mounted on the four ends of the cross member, a pair of the positioning sleeves on the diagonal line is fixedly connected to the transmission shaft assembly, and another pair of the positioning sleeves on the diagonal line is fixedly connected to the corresponding flange assembly.

2. The quickly detachable C-type universal coupling according to claim 1, characterized in that: The cross member comprises a joint body and a journal arranged on the joint body in a cross shape, a needle bearing is sleeved on the journal, and the positioning sleeve is sleeved on the needle bearing.

3. The quickly detachable C-type universal coupling according to claim 2, characterized in that: The joint body is provided with an oil filling nozzle, the journal is provided with an oil outlet nozzle, and the cross-section is provided with a lubricating oil passage connecting the oil filling nozzle and the oil outlet nozzle; the root of the journal is sequentially sleeved with a sleeve seal and an oil seal, and the oil seal abuts against the opening of the positioning sleeve.

4. The quickly detachable C-type universal coupling according to claim 1, characterized in that: The transmission shaft assembly and the flange assembly are both provided with a C-shaped yoke on one side relative to the cross shaft assembly, and the C-shaped yoke and the corresponding positioning sleeve are fixedly connected by bolts and screw holes.

5. The quickly detachable C-type universal coupling according to claim 4, characterized in that: Two mounting holes are symmetrically arranged on both sides of the positioning sleeve, the screw hole is arranged on the C-shaped yoke, and the mounting hole and the screw hole are arranged opposite to each other; the bolt passes through the mounting hole from one side of the positioning sleeve and is fixedly connected to the screw hole on the C-shaped yoke.

6. The quickly detachable C-type universal coupling according to claim 1, characterized in that: The flange assembly is provided with at least two pairs of connection holes rotationally symmetrically along its axis, and the connection holes are used for fixing the flange assembly to an external flange assembly via bolts and nuts.

7. The quickly detachable C-type universal coupling according to claim 5 or 6, characterized in that: When assembling the bolts, thread locking glue is applied and spring washers are placed.

8. The quickly detachable C-type universal coupling according to claim 5 or 6, characterized in that: The bolts are tightened with a fixed torque in diagonal order during assembly.

9. The quickly detachable C-type universal coupling according to claim 4, characterized in that: The C-shaped yoke and the corresponding positioning sleeve are also positioned and connected via a concave stop and a convex stop.

10. The quickly detachable C-type universal coupling according to claim 1, characterized in that: The transmission shaft assembly comprises a spline shaft and a spline sleeve which are matched and connected. A protective sleeve is sleeved at the connection between the spline shaft and the spline sleeve, and an oil filling port is arranged on the protective sleeve.

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