Hydraulic telescopic universal coupling

Abstract

The utility model discloses a hydraulic telescopic universal coupling, and belongs to the technical field of couplings. The problem that in the prior art, a coupler is inconvenient to adjust and stretch is solved. Comprising a spline fork head shaft, the spline fork head shaft is provided with a hydraulic cylinder mounting hole in the axial direction of the spline fork head shaft, a hydraulic cylinder is arranged in the hydraulic cylinder mounting hole, a fixing plate is arranged at an orifice, close to the front end of the hydraulic cylinder, of the hydraulic cylinder mounting hole, and a front end cover of the hydraulic cylinder is fixedly arranged on the fixing plate which is provided with a piston hole. The end, close to the fixing plate, of the spline fork head shaft is slidably sleeved with a spline sleeve, a piston rod of the hydraulic cylinder penetrates through the piston hole to be fixedly connected with the spline sleeve, and the end, away from the spline sleeve, of the spline fork head shaft and the fixed end of the spline sleeve are both provided with universal joints which are movably connected with flange fork heads through connecting pieces. An oil inlet and return connector of the hydraulic cylinder is communicated with the hydraulic valve through an oil pipe. The hydraulic telescopic universal coupling is used for adjusting the expansion and contraction of the coupling, and the automatic expansion and contraction of the coupling can be conveniently realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings, and in particular relates to a hydraulic telescopic universal coupling. Background Art

[0002] During the installation and disassembly process of the traditional telescopic universal coupling, it is necessary to use manual or crane external forces to push and pull the spline pair to achieve the telescopic of the universal coupling. This method requires the use of tools or external forces to drag the universal coupling, which is time-consuming and labor-intensive, and inconvenient to install and disassemble. When the coupling is used for vertical installations such as vertical roll mills, the connecting equipment at both ends of the coupling bears additional axial force for a long time, which affects the service life of related equipment. In order to facilitate the replacement of working rolls, an additional coupling lifting mechanism is added to lift the coupling to achieve telescopic, which occupies limited equipment space and affects the layout of the rolling mill equipment. When replacing the hydraulic cylinder or the hydraulic cylinder seal, it is necessary to open the flanges at both ends, and then remove the bolts at both ends before dragging the hydraulic cylinder out for replacement, which is inconvenient to disassemble and assemble. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a hydraulic telescopic universal coupling, which is convenient for realizing automatic telescopic movement of the coupling.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model discloses a hydraulic telescopic universal coupling, comprising a spline fork shaft, the spline fork shaft is provided with a hydraulic cylinder mounting hole extending along its axial direction, a hydraulic cylinder is arranged in the hydraulic cylinder mounting hole, a fixing plate is arranged at an opening of the hydraulic cylinder mounting hole close to the front end of the hydraulic cylinder, a front end cover of the hydraulic cylinder is fixedly arranged on the fixing plate, the fixing plate is provided with a piston hole, a sliding sleeve is provided with a spline sleeve at one end of the spline fork shaft close to the fixing plate, a piston rod of the hydraulic cylinder is fixedly connected to the spline sleeve through the piston hole, a universal joint is arranged at one end of the spline fork shaft away from the spline sleeve and a fixed end of the spline sleeve, the universal joint is movably connected with a flange fork through a connecting piece, and the oil inlet and return joints of the hydraulic cylinder are connected to a hydraulic valve through an oil pipe.

[0006] Furthermore, the spline fork shaft is provided with an oil inlet and return joint hole, and the oil inlet and return joint passes through the oil inlet and return joint hole and extends out of the spline fork shaft to communicate with the hydraulic valve through the oil pipe.

[0007] Furthermore, the oil pipe is a steel pipe.

[0008] Furthermore, the universal joint is a cross-axis universal joint, the connecting piece is a cross bag, and the cross-axis universal joint is movably connected to the corresponding flange fork through the cross bag.

[0009] Furthermore, a protective cover is provided at one end of the spline fork shaft away from the spline sleeve, and the sliding end of the spline sleeve is sleeved in the protective cover.

[0010] Further, the spline sleeve is provided with a connecting plate, the connecting plate is provided with an end cover mounting hole, the end cover mounting hole is provided with an end cover, the end cover includes a cover body, one end of the cover body is provided with a cover edge, the cover body is sleeved in the end cover mounting hole, the cover edge covers the edge of the end cover mounting hole, the cover body is provided with a piston rod mounting hole, the inner side wall of one end of the piston rod mounting hole close to the cover edge is provided with an annular clamp mounting groove, the outer side wall of the piston rod of the hydraulic cylinder is provided with an annular groove, the hydraulic The piston rod of the cylinder passes through the piston rod mounting hole, the groove is provided with a semicircular clamp matching therewith, the clamp is sleeved in the clamp mounting groove, the end cover is provided with a pressure cover, the pressure cover is provided with an end cover mounting groove, the cover edge is sleeved in the end cover mounting groove, the pressure cover is fixedly connected with the connecting plate bolts, the cover body, the cover edge, and one end of the clamp close to the pressure cover are flush, and the inner bottom wall of the end cover mounting groove is in contact with the end faces of the cover body, the cover edge, and one end of the clamp close to the pressure cover.

[0011] Furthermore, guide blocks are provided in the hydraulic cylinder near the rear end cover and the middle position thereof, and the guide blocks are provided with guide holes along the axial direction of the hydraulic cylinder, and the piston rod of the hydraulic cylinder can be slidably inserted into the guide holes.

[0012] The beneficial effects of the utility model are:

[0013] The utility model provides a hydraulic telescopic universal coupling, which is used to adjust the telescopic coupling. An axial hydraulic cylinder is arranged inside the spline fork shaft, and a spline sleeve is slidably sleeved on one end of the spline fork shaft close to the front end of the hydraulic cylinder. The piston rod of the hydraulic cylinder is fixedly connected to the spline sleeve, and the hydraulic cylinder is connected to the hydraulic valve. By operating the control valve of the hydraulic valve, the amount and pressure of the hydraulic oil in the two oil chambers of the hydraulic cylinder are changed, the piston of the hydraulic cylinder is adjusted to move back and forth toward the two oil chambers, and the telescopic movement of the piston rod of the hydraulic cylinder is automatically adjusted, driving the spline sleeve to slide back and forth along the axial direction of the spline fork shaft, thereby realizing the telescopic movement of the universal coupling, and no manual adaptation tool is required to mechanically adjust the telescopic movement of the universal coupling, thereby reducing the damage to the universal coupling caused by external forces and tools, saving time and labor, improving work efficiency, and extending the service life of the universal coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a partial cross-sectional view of a hydraulic telescopic universal coupling provided by an embodiment of the utility model;

[0016] Figure 2 It is a cross-sectional view of a hydraulic telescopic universal coupling provided by an embodiment of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of a hydraulic cylinder provided in an embodiment of the utility model;

[0018] Figure 4 is a radial cross-sectional view of a hydraulic cylinder provided by an embodiment of the utility model;

[0019] Figure 5 It is an assembly diagram of a gland, an end cover, a clamp, a connecting plate, and a piston rod provided in an embodiment of the utility model.

[0020] Figure numerals: flange fork 1, cross bag 2, spline fork shaft 3, steel pipe 4, hydraulic valve 5, hydraulic cylinder 6, piston rod 601, spline sleeve 7, universal joint 8, pressure cover 9, bolt 10, end cover 11, clamp 12, connecting plate 13, fixing plate 14, protective cover 15, guide block 16, oil inlet and return joint 17. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, this embodiment provides a hydraulic telescopic universal coupling, including a spline fork shaft 3, the spline fork shaft 3 is provided with a hydraulic cylinder mounting hole along its axial direction, a hydraulic cylinder 6 is arranged in the hydraulic cylinder mounting hole, a fixing plate 14 is provided at the opening of the hydraulic cylinder mounting hole near the front end of the hydraulic cylinder 6, the front end cover of the hydraulic cylinder 6 is fixedly arranged on the fixing plate 14, the fixing plate 14 is provided with a piston hole, a spline sleeve 7 is slidingly sleeved at one end of the spline fork shaft 3 near the fixing plate 14, a piston rod 601 of the hydraulic cylinder 6 is fixedly connected to the spline sleeve 7 through the piston hole, a universal joint 8 is provided at one end of the spline fork shaft 3 away from the spline sleeve 7 and a fixed end of the spline sleeve 7, the universal joint 8 is movably connected to the flange fork 1 through a connecting piece, and the oil inlet and return joint 17 of the hydraulic cylinder 6 is connected to the hydraulic valve 5 through an oil pipe. The extension length of the piston rod 601 of the hydraulic cylinder 6 is less than the length of the spline sleeve 7, ensuring that the spline sleeve 7 will not slip off the spline fork shaft 3. The hydraulic valve 5 can be fixedly arranged on the side wall of the spline fork shaft 3 by bolts. The hydraulic cylinder mounting hole is a through hole or a blind hole. When the hydraulic cylinder mounting hole is a through hole, fixing plates 14 are arranged at both ends of the hydraulic cylinder mounting hole.

[0024] The hydraulic telescopic universal coupling based on the above structure is used to adjust the telescopic coupling. An axial hydraulic cylinder 6 is arranged inside the spline fork shaft 3, and a spline sleeve 7 is slidably sleeved on one end of the spline fork shaft 3 close to the front end of the hydraulic cylinder 6. The piston rod 601 of the hydraulic cylinder 6 is fixedly connected to the spline sleeve 7, and the hydraulic cylinder 6 is connected to the hydraulic valve 5. By operating the control valve of the hydraulic valve 5, the amount and pressure of the hydraulic oil in the two oil chambers of the hydraulic cylinder 6 are changed, and the piston of the hydraulic cylinder 6 is adjusted to move back and forth toward the two oil chambers, and the telescopic movement of the piston rod 601 of the hydraulic cylinder 6 is automatically adjusted, driving the spline 7 sleeve to slide back and forth along the axial direction of the spline fork shaft 3, thereby realizing the telescopic movement of the universal coupling, and no manual adaptation tool is required to mechanically adjust the telescopic movement of the universal coupling, reducing the damage to the universal coupling caused by external forces and tools, saving time and labor, improving work efficiency, and extending the service life of the universal coupling. The hydraulic telescopic universal coupling of the present application is used for vertical installations such as vertical roller mills to eliminate the axial force of the equipment connected at both ends of the universal coupling, improve the stress condition of related equipment, and extend the service life of the equipment.

[0025] As an implementation method, Figure 1 , Figure 3 , Figure 4 As shown, the spline yoke shaft 3 is provided with an oil inlet and return joint hole, and the oil inlet and return joint 17 passes through the oil inlet and return joint hole and extends out of the spline yoke shaft 3 to communicate with the hydraulic valve 5 through the oil pipe.

[0026] The oil inlet and return joint 17 extends through the oil inlet and return joint hole to extend the spline fork shaft 3 and communicate with the hydraulic valve 5, which is convenient for disassembly and installation of the oil inlet and return joint 17 and the oil pipe, and is convenient for later maintenance.

[0027] As an implementation method, Figure 1 As shown, the oil pipe is a steel pipe 4.

[0028] The oil pipe is made of steel pipe 4, which has the characteristics of corrosion resistance, wear resistance, high safety factor, can adapt to different working environments, and is easy to install and arrange.

[0029] As an implementation method, Figure 1 As shown, the universal joint 8 is a cross-axis universal joint, the connecting piece is a cross bag 2, and the cross-axis universal joint is movably connected to the corresponding flange fork 1 through the cross bag 2.

[0030] The cross-axis universal joint has a compact structure, large angle compensation capability, large load-bearing capacity, high transmission efficiency, stable transportation, low noise, and convenient assembly and maintenance. It improves the load-bearing capacity and transmission efficiency of the coupling and facilitates assembly and maintenance of the coupling.

[0031] As an implementation method, Figure 1 , Figure 2 As shown, a protective cover 15 is provided at one end of the spline yoke shaft 3 away from the spline sleeve 7 , and the sliding end of the spline sleeve 7 is sleeved in the protective cover 15 .

[0032] The protective cover 15 protects and prevents dust from entering the spline fork shaft 3 and damaging it. The protective cover 15 effectively protects the entire spline fork shaft 3 in combination with the spline sleeve 7.

[0033] As an implementation method, Figure 1 , Figure 2 , Figure 5As shown, the spline sleeve 7 is provided with a connecting plate 13, the connecting plate 13 is provided with an end cover mounting hole, the end cover mounting hole is provided with an end cover 11, the end cover 11 includes a cover body, one end of the cover body is provided with a cover edge, the cover body is sleeved in the end cover mounting hole, the cover edge covers the edge of the end cover mounting hole, the cover body is provided with a piston rod mounting hole, the inner side wall of one end of the piston rod mounting hole close to the cover edge is provided with an annular clamp mounting groove, the outer side wall of the piston rod 601 of the hydraulic cylinder 6 is provided with an annular groove, the piston rod of the hydraulic cylinder 6 601 passes through the piston rod mounting hole, and the groove is provided with a semicircular clamp 12 that cooperates with it. The clamp 12 is sleeved in the clamp mounting groove, and the end cover 11 is provided with a pressure cover 9, and the pressure cover 9 is provided with an end cover mounting groove. The cover edge is sleeved in the end cover mounting groove, and the pressure cover 9 is fixedly connected with the connecting plate 13 by bolts 10. The cover body, the cover edge, and the clamp 12 are flush with one end of the pressure cover 9, and the inner bottom wall of the end cover mounting groove is in contact with the end faces of the cover body, the cover edge, and the clamp 12 close to one end of the pressure cover 9.

[0034] When installing the hydraulic cylinder 6, put the rear end of the hydraulic cylinder 6 into the hydraulic cylinder mounting hole, the front end of the hydraulic cylinder 6 is bolted to the fixing plate 14, the cover body of the end cover 11 is sleeved in the end cover mounting hole of the connecting plate 13, the piston rod 601 of the hydraulic cylinder 6 is extended and passes through the piston rod mounting hole of the cover body, the connecting ends of the two semicircular clamps 12 and the piston rod 601 are clamped in the annular groove of the piston rod 601, the piston rod 601 of the hydraulic cylinder 6 is contracted, and the semicircular clamps 12 and The connecting end of the cover body is embedded in the card installation groove, and the pressure cover 9 is covered on the end cover 11. The cover edge of the end cover 11 is embedded in the end cover installation groove. The pressure cover 9 and the connecting plate 13 are provided with matching screw holes. The bolts 10 pass through the corresponding screw holes and are tightened to fix the pressure cover 9 and the connecting plate 13. The piston rod 601 of the hydraulic cylinder 6 is fixedly connected to the spline sleeve 7. The inner bottom wall of the installation groove fits and presses the cover body, the cover edge, the card 12, and the piston rod 601, and the fixed connection is more stable and reliable. When disassembling, loosen the bolt 10 to remove the pressure cover 9, the piston rod 601 extends, and the card 12 extends out of the card installation groove. Remove the card 12, which is very convenient. Then remove the bolts connecting the front end of the hydraulic cylinder 6 and the fixed plate 14, and the hydraulic cylinder 6 can be taken out, which is convenient for the later disassembly and maintenance of the hydraulic cylinder 6.

[0035] As an implementation method, Figure 2 As shown, guide blocks 16 are provided in the hydraulic cylinder 6 near its rear end cover and the middle position. The guide block 16 is provided with a guide hole along the axial direction of the hydraulic cylinder 6. The piston rod 601 of the hydraulic cylinder 6 can be slidably inserted into the guide hole.

[0036] The guide block 16 guides the piston rod 601 of the hydraulic cylinder 6. The piston rod 601 moves back and forth along the guide hole, driving the spline sleeve 7 to achieve the extension and retraction of the coupling. The piston of the hydraulic cylinder 6 and the guide block 16 are located on both sides of the hydraulic cylinder 6. The guide block 16 is located at the rear side of the middle position of the hydraulic cylinder 6, and the piston of the hydraulic cylinder 6 is located at the front side of the middle position of the hydraulic cylinder 6.

[0037] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present invention, which should be included in the protection scope of the present invention.

Claims

1. A hydraulic telescopic universal coupling, comprising a splined fork shaft (3), characterized in that: The spline fork shaft (3) is provided with a hydraulic cylinder mounting hole extending along its axial direction, a hydraulic cylinder (6) is arranged in the hydraulic cylinder mounting hole, a fixing plate (14) is arranged at the opening of the hydraulic cylinder mounting hole close to the front end of the hydraulic cylinder (6), a front end cover of the hydraulic cylinder (6) is fixedly arranged on the fixing plate (14), the fixing plate (14) is provided with a piston hole, a spline sleeve (7) is slidingly sleeved at one end of the spline fork shaft (3) close to the fixing plate (14), a piston rod (601) of the hydraulic cylinder (6) passes through the piston hole and is fixedly connected to the spline sleeve (7), a universal joint (8) is arranged at one end of the spline fork shaft (3) away from the spline sleeve (7) and a fixed end of the spline sleeve (7), the universal joint (8) is movably connected to the flange fork (1) through a connecting piece, and the oil inlet and return joint (17) of the hydraulic cylinder (6) is connected to the hydraulic valve (5) through an oil pipe.

2. A hydraulic telescopic universal coupling according to claim 1, characterized in that: The spline fork shaft (3) is provided with an oil inlet and return joint hole, and the oil inlet and return joint (17) passes through the oil inlet and return joint hole and extends out of the spline fork shaft (3) to communicate with the hydraulic valve (5) through the oil pipe.

3. A hydraulic telescopic universal coupling according to claim 2, characterized in that: The oil pipe is a steel pipe (4).

4. The hydraulic telescopic universal coupling according to claim 1, characterized in that: The universal joint (8) is a cross-axis universal joint, the connecting piece is a cross bag (2), and the cross-axis universal joint is movably connected to the corresponding flange fork (1) via the cross bag (2).

5. The hydraulic telescopic universal coupling according to claim 1, characterized in that: A protective cover (15) is provided at one end of the spline fork shaft (3) away from the spline sleeve (7), and the sliding end of the spline sleeve (7) is sleeved in the protective cover (15).

6. The hydraulic telescopic universal coupling according to claim 1, characterized in that: The spline sleeve (7) is provided with a connecting plate (13), the connecting plate (13) is provided with an end cover mounting hole, the end cover mounting hole is provided with an end cover (11), the end cover (11) comprises a cover body, one end of the cover body is provided with a cover edge, the cover body is sleeved in the end cover mounting hole, the cover edge covers the edge of the end cover mounting hole, the cover body is provided with a piston rod mounting hole, the inner side wall of one end of the piston rod mounting hole close to the cover edge is provided with an annular clamp mounting groove, the outer side wall of the piston rod (601) of the hydraulic cylinder (6) is provided with an annular groove, the piston rod (601) of the hydraulic cylinder (6) passes through The piston rod mounting hole, the groove is provided with a semicircular clamp (12) matched therewith, the clamp (12) is sleeved in the clamp mounting groove, the end cover (11) is provided with a pressure cover (9), the pressure cover (9) is provided with an end cover mounting groove, the cover edge is sleeved in the end cover mounting groove, the pressure cover (9) is fixedly connected with the connecting plate (13) by bolts (10), the cover body, the cover edge and the clamp (12) are flush with one end of the pressure cover (9), and the inner bottom wall of the end cover mounting groove is in contact with the end surface of the cover body, the cover edge and the clamp (12) close to one end of the pressure cover (9).

7. The hydraulic telescopic universal coupling according to claim 1, characterized in that: The hydraulic cylinder (6) is provided with guide blocks (16) near its rear end cover and at the middle position. The guide blocks (16) are provided with guide holes along the axial direction of the hydraulic cylinder (6). The piston rod (601) of the hydraulic cylinder (6) can be slidably inserted into the guide holes.

Images