A new type of hydraulic coupling device

Abstract

The present invention discloses a novel hydraulic coupling device. The key points of its technical solution include a connecting member and coupling sleeves arranged on both sides of the connecting member. The coupling sleeve includes an outer sleeve body connected to the connecting member and an inner wall pressure sleeve arranged inside the outer sleeve body. A pressure oil cavity is provided between the outer sleeve body and the inner wall pressure sleeve. An oil inlet channel and an oil outlet channel respectively communicating with the pressure oil cavity are provided on the outer sleeve body. An oil inlet nozzle is provided in cooperation with the oil inlet channel, and an oil outlet nozzle is provided in cooperation with the oil outlet channel. The present invention provides a novel power transmission element, which has the characteristics of being structurally compact, light in weight, small in moment of inertia, easy to assemble, safe and reliable, and can be flexibly combined with various other elements for use.

Description

Technical Field

[0001] The present invention relates to the technical field of coupling sleeves, and more specifically, it relates to a novel hydraulic coupling device. Background Art

[0002] A coupling sleeve refers to a device that connects two shafts or a shaft and a rotating part, rotates together during the transmission of motion and power, and cannot be disengaged under normal circumstances. Sometimes it is also used as a safety device to prevent the connected parts from bearing excessive loads and play an overload protection role.

[0003] The connection device of the traditional coupling sleeve is connected by a key. Keyways are machined on both the coupling sleeve and the shaft. The coupling sleeve and the shaft are connected by the key. According to the connection requirements, the key also has various types. Moreover, due to the existence of the keyway on the shaft, not only the strength of the shaft is weakened, but also the processing difficulty and cost are increased. In order to make the shaft have sufficient strength, generally, the shaft diameter needs to be increased, resulting in an increase in the usage cost and the volume of the equipment also increases accordingly. For the traditional key connection, the mating surfaces between the shaft and the coupling sleeve mostly adopt interference fit or transition fit. During installation, the coupling sleeve needs to be heated, and during disassembly, a professional puller is required. The installation and disassembly are time-consuming and laborious.

[0004] For the coupling sleeve on the existing hydraulic coupling sleeve, since there is only one installation oil inlet cavity and no disassembly oil inlet cavity, during disassembly, high-pressure hydraulic oil is injected through the oil drain hole, and the axial force is generated after the force acting on the conical surface is decomposed to disassemble the coupling sleeve. This decomposition force is limited. When the coupling sleeve is very large, the disassembly becomes very laborious. If it is used for a period of time, the coupling sleeve weighing several tons can basically not be disassembled. Summary of the Invention

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the present invention is to provide a novel hydraulic coupling device, a novel power transmission element, which has the characteristics of compact structure, light weight, small moment of inertia, easy assembly, safety and reliability, and can be flexibly combined with other various elements for use.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A novel hydraulic coupling device, including a connecting piece and coupling sleeves arranged on both sides of the connecting piece, characterized in that: the coupling sleeve includes an outer sleeve body connected to the connecting piece and an inner wall pressure sleeve arranged inside the outer sleeve body. A pressure oil cavity is provided between the outer sleeve body and the inner wall pressure sleeve. An oil inlet channel and an oil outlet channel respectively communicating with the pressure oil cavity are provided on the outer sleeve body. An oil inlet nozzle is provided in cooperation with the oil inlet channel, and an oil outlet nozzle is provided in cooperation with the oil outlet channel.

[0007] By adopting the above technical solution, hydraulic oil is injected into the pressure oil cavity through the oil inlet nozzle, so that the inner wall pressure sleeve undergoes elastic deformation under the pressure of the hydraulic oil, and the clearance fit between the inner hole of the inner wall pressure sleeve and the mounting shaft becomes an interference fit, realizing the keyless connection between the coupling sleeve and the mounting shaft, without damaging the mating surfaces of the two, improving the installation strength and having higher precision; the hydraulic oil in the pressure oil cavity is discharged through the oil outlet nozzle.

[0008] The present invention is further configured as: a limiting groove is provided on any side portion of the inner wall of the outer sleeve body, and an annular convex block is provided on the other side portion, and the inner wall pressure sleeve is provided with a limiting convex block in cooperation with the limiting groove.

[0009] By adopting the above technical solution, the limiting groove is arranged in accordance with the limiting convex groove, and the pressure oil cavity is formed in cooperation with the annular convex block, which can reduce the stress generated during the deformation of the inner wall pressure sleeve; and the limiting convex block on the inner wall pressure sleeve can be arranged on the side fitting the coupling shaft or on the other side.

[0010] The present invention is further configured as: the limiting groove and the limiting convex block, and the annular convex block and the outer wall of the inner wall pressure sleeve are fixedly fitted through connecting parts.

[0011] By adopting the above technical solution, the connecting parts are two welding joints, which are both arranged at the two ends of the outer sleeve body and the inner wall pressure sleeve, with a simple structure, convenient operation and strong connection stability.

[0012] The present invention is further configured as: the oil inlet nozzle includes an upper oil inlet, a needle valve matching the upper oil inlet, a pressure regulating spring arranged at the lower end of the needle valve, and a lower oil inlet connected to the oil inlet channel.

[0013] By adopting the above technical solution, in the non-use state, the needle valve is pressed against the upper oil inlet under the pressure of the pressure regulating spring, blocking the upper oil inlet. When it is necessary to inject hydraulic oil, the oil inlet nozzle is connected to the nozzle of the oil changing cavity, and the nozzle pushes the needle valve downward. The needle valve also presses down the pressure regulating spring, and the hydraulic oil then flows into the lower oil inlet and enters the pressure oil cavity through the oil inlet channel, realizing the entry of the hydraulic oil, with a simple structure, strong sealing performance and convenient use.

[0014] The present invention is further configured as: a sealing ring is provided on the outer wall of the lower oil inlet nozzle.

[0015] By adopting the above technical solution, the sealing ring is arranged between the oil inlet nozzle and the outer sleeve, improving the sealing effect.

[0016] The present invention is further configured as: the oil inlet nozzle is provided with a convex platform matching the sealing ring, and an elastic member is arranged between the convex platform and the sealing ring, and the material of the elastic member is polyurethane.

[0017] By adopting the above technical solution, the elastic member can relieve the friction between the fuel inlet nozzle and the outer sleeve, preventing damage caused by friction; preferably, the polyurethane elastic member can achieve the effects of wear resistance, oil resistance and shock absorption.

[0018] The present invention is further configured as: the fuel outlet nozzle includes a fuel outlet cavity, an oil stop mechanism cooperating with the fuel outlet cavity, an upper oil discharge channel and a lower oil discharge channel respectively communicating with the fuel outlet cavity, and the lower oil discharge channel communicates with the oil discharge channel.

[0019] The present invention is further configured as: the oil stop mechanism includes an oil stop bead disposed in the fuel outlet cavity, a set screw disposed at the upper end of the oil stop bead, and a sealing screw cooperating with the set screw.

[0020] By adopting the above technical solution, the oil stop bead is used to open and close the lower oil discharge channel, the set screw fixes the oil stop bead disposed in the fuel outlet cavity, blocking the lower oil discharge channel to prevent the hydraulic oil from flowing out; the sealing screw can prevent the set screw from loosening, improving the sealing performance and making the oil stop bead more stable; when the oil stop bead loosens, the hydraulic oil enters the fuel outlet cavity and then flows out from the upper oil discharge channel at the side end, which can avoid accidentally injuring the operator.

[0021] The present invention is further configured as: the upper oil discharge channel is inclined, and a drainage inclined surface is provided at the connection portion between the fuel outlet cavity and the upper oil discharge channel.

[0022] By adopting the above technical solution, the drainage inclined surface can introduce the hydraulic oil in the fuel outlet cavity into the upper oil discharge channel, preventing the hydraulic oil from accumulating in the fuel outlet cavity, and the inclination of the upper oil discharge channel prevents the backflow of the hydraulic oil.

[0023] The present invention is further configured as: dust caps are provided for both the upper fuel inlet and the upper oil discharge channel.

[0024] By adopting the above technical solution, the dust cap includes a cap body and a boss provided at the lower end of the cap body. A through hole is provided in the boss, and an external thread is provided on the outer wall of the boss. Both the upper fuel inlet and the upper oil discharge channel are disposed in the cavity of the outer sleeve. Internal threads cooperating with the external thread are provided on the inner walls of the two cavities. They are fixed by screwing through the threads. The lower end surface of the cap body abuts against the cavity opening, forming a sealed space, which plays a protective role and prevents blockage caused by dust contamination of the two oil ports.

[0025] The present invention has the following advantages: This hydraulic coupling sleeve is connected to the inlet through a manual oil pump. High-pressure oil is pumped into the double-wall pressure chamber. The double-wall pressure sleeve expands under the oil pressure, and the inner wall compresses inward to press tightly against the shaft, so that the flange member generates frictional connection through the pressure sleeve.

[0026] The inner cavity pressure sleeve of this hydraulic coupling sleeve maintains a constant pressure, has good reliability, is convenient for disassembly, installation and maintenance. The hydraulic coupling sleeve is convenient for adjusting torque, and the required ultimate torque can be changed by changing the pressure of the fuel pump.

[0027] This hydraulic coupling sleeve has changed the traditional modes of shaft key coupling, taper and expansion sleeve connection. Its incomparable technical characteristics and advantages have been applied, bringing good effects. Brief Description of the Drawings

[0028] Figure 1 It is the front view of the structure of two coupling sleeves of the present invention installed on the connecting piece;

[0029] Figure 2 It is the front view of the structure of the coupling sleeve of the present invention;

[0030] Figure 3 It is the side view of the structure of the coupling sleeve of the present invention;

[0031] Figure 4 It is the front view of the structure of the oil inlet nozzle of the present invention;

[0032] Figure 5 It is the front view of the structure of the oil outlet nozzle of the present invention;

[0033] In the figure: 1. Connecting piece; 2. Coupling sleeve; 3. Outer sleeve body; 4. Inner wall pressure sleeve; 5. Pressure oil cavity; 6. Oil inlet channel; 7. Oil outlet channel; 8. Oil inlet nozzle; 9. Oil outlet nozzle; 10. Limit groove; 11. Annular convex block; 12. Limit convex block; 13. Upper oil inlet; 14. Needle valve; 15. Pressure regulating spring; 16. Lower oil inlet; 17. Elastic member; 18. Sealing ring; 19. Oil outlet cavity; 20. Upper oil discharge channel; 21. Lower oil discharge channel; 22. Oil stop bead; 23. Set screw; 24. Sealing screw; 25. Drainage inclined surface; 26. Dust cap. Detailed Embodiment

[0034] Refer to Figures 1 to 5As shown, a new type of hydraulic coupling device of the present embodiment comprises a connecting member 1 and a coupling sleeve 2 arranged on both sides of the connecting member 1, the coupling sleeve 2 comprises an outer sleeve body 3 connected to the connecting member 1 and an inner wall pressure sleeve 4 arranged in the outer sleeve body 3, the inner part of the outer sleeve body 3 is hollow, an annular flange is provided at one end, a plurality of through-hole teeth are provided on the annular flange, the through-hole teeth are used to correspond to the through-hole teeth on the connecting member 1, and are fixedly connected by threaded nuts, the inner hole of the outer sleeve body 3 matches with the outer circle of the inner wall pressure sleeve 4, a limiting groove 10 is provided on one side of the inner wall of the outer sleeve body 3, and an annular protrusion 11 is provided on the other side, a limiting protrusion 12 is provided on the side of the inner wall pressure sleeve 4 contacting with the limiting groove 10, and the limiting protrusion 12 can be embedded in the limiting protrusion, because the annular protrusion 11 on the other side of the outer sleeve body 3 abuts on the outer wall of the inner wall pressure sleeve 4, so that the outer sleeve body 3 and the inner wall pressure sleeve 4 are clearance matched, and pressure oil is injected into the gap to form an annular pressure oil chamber 5, thereby realizing a keyless connection.

[0035] A connecting portion is provided on the connecting outer wall between the limiting groove 10 and the limiting protrusion 12, and a connecting portion is provided on the connecting outer wall between the annular protrusion 11 and the inner wall pressure sleeve 4. Both connecting portions are triangularly welded and fixedly connected.

[0036] The outer casing 3 is provided with an oil inlet channel 6 and an oil outlet channel 7 which are respectively connected to the pressure oil chamber 5. An oil inlet nozzle 8 is provided to match the oil inlet channel 6, and an oil outlet nozzle 9 is provided to match the oil outlet channel 7. Hydraulic oil is injected into the oil inlet nozzle 8 and then introduced into the pressure oil chamber 5 through the oil inlet channel 6. The oil inlet nozzle 8 and the oil outlet nozzle 9 are both arranged at the end of the outer casing 3 away from the annular flange. The two oil nozzles are arranged on the same cross-section and are arranged at right angles to the central axis of the outer casing 3. This not only facilitates the in and out operations of the two oil nozzles, but also makes inspection more convenient during the daily maintenance of the equipment.

[0037] The oil inlet nozzle 8 includes an upper oil inlet 13, a needle valve 14 matching the upper oil inlet 13, a pressure regulating spring 15 arranged at the lower end of the needle valve 14, and a lower oil inlet 16 connected to the oil inlet channel 6. The pressure regulating spring 15 can be sleeved on the outer wall of the needle valve 14, or can be arranged at the lower end of the needle valve 14. The opening diameter of the oil inlet 13 is smaller than the diameter of the needle head of the needle valve 14, so that the top of the needle valve 14 can be pressed against the inside of the opening of the upper oil inlet 13. When the pressure regulating spring 15 is compressed, the needle valve 14 moves downward, so that the needle head of the needle valve 14 leaves the opening of the oil inlet 13, forming a gap space for oil inlet, allowing hydraulic oil to enter.

[0038] A sealing ring 18 is disposed on the outer wall of the oil inlet nozzle 8 .

[0039] The oil inlet nozzle 8 is provided with a boss that matches the sealing ring 18, and an elastic member 17 is provided between the boss and the sealing ring 18. The material of the elastic member 17 is polyurethane.

[0040] The oil outlet nozzle 9 includes an oil outlet cavity 19, an oil stop mechanism cooperating with the oil outlet cavity 19, an upper oil discharge channel 20 and a lower oil discharge channel 21 respectively communicating with the oil outlet cavity 19, and the lower oil discharge channel 21 communicates with the oil discharge channel 7.

[0041] The oil stop mechanism includes an oil stop bead 22 arranged in the oil outlet cavity 19, a set screw 23 arranged at the upper end of the oil stop bead 22, and a sealing screw 24 cooperating with the set screw 23.

[0042] The upper oil discharge channel 20 is inclined, and a drainage inclined surface 25 is provided at the connection part between the oil outlet cavity 19 and the upper oil discharge channel 20.

[0043] Dust caps 26 are provided in cooperation with the upper oil inlet 13 and the upper oil discharge channel 20.

[0044] The oil inlet nozzle 8 is in threaded connection and cooperation with the oil inlet channel 6, the oil outlet nozzle 9 and the oil discharge channel 7, which is convenient for disassembly and inspection of the oil inlet nozzle 8 and the oil outlet nozzle 9.

[0045] By adopting the above technical solution, when installing the coupling sleeve 2, the equipment is lifted by an external force, the inner wall pressure sleeve 4 of the coupling sleeve 2 is aligned with the inner hole of the installation shaft, the coupling sleeve 2 is pushed, and the coupling sleeve 2 is sleeved outside the installation shaft. At this time, the coupling sleeve 2 is still in a rotatable state. By rotating the coupling sleeve 2, the dust caps 26 on the coupling sleeve 2 are all rotated out, and the oil inlet nozzle 8 and the oil outlet nozzle 9 are respectively screwed into the upper end of the oil inlet channel 6 and the upper end of the oil discharge channel 7. After the installation is in place, first install the dust cap 26 on the oil outlet nozzle 9, then rotate the oil inlet nozzle 8 upward, manually connect the yellow gun to the oil inlet nozzle 8, and add hydraulic oil to the pressure oil cavity 5 to increase the internal high pressure. The continuous input of the hydraulic oil causes the inner wall pressure sleeve 4 to deform, so that an interference fit is generated between the installation shaft and the inner hole of the inner wall pressure sleeve 4 until the coupling shaft cannot rotate and is firmly fixed on the installation shaft. Finally, the oil changing gun is manually disassembled, the coupling and the installation shaft are locked, and the dust cap 26 of the oil inlet is installed.

[0046] When the coupling needs to be disassembled, first unscrew the dust cap 26 of the oil outlet nozzle 9, then use a wrench to unscrew the sealing screw 24, and then loosen the set screw 23. At this time, the high pressure in the pressure oil cavity 5 will force the hydraulic oil to lift the oil stop bead 22, and the hydraulic oil flows into the oil outlet cavity 19 from the lower oil discharge channel 21 and then flows out from the upper oil discharge channel 20. After the pressure in the pressure oil cavity 5 is released, the pressure inner wall sleeve will recover its elastic deformation, and a gap will appear between the inner hole of the pressure inner wall sleeve and the installation shaft. At this time, the coupling sleeve 2 can be rotated, so that the coupling sleeve 2 can be smoothly disassembled from the installation shaft.

[0047] In addition to the above embodiments, the coupling sleeve connection device of the present invention can also be used in combination with the half coupling of the elastic pin coupling, the external gear shaft sleeve of the elastic pin gear coupling, the half coupling of the elastic sleeve pin coupling, the external gear shaft sleeve of the drum gear coupling, the half coupling of the flange coupling, and the half coupling of the diaphragm coupling.

[0048] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A novel hydraulic coupling device, comprising a connecting member (1) and coupling sleeves (2) arranged on both sides of the connecting member (1), characterized in that: The coupling sleeve (2) includes an outer sleeve body (3) connected to the coupling member (1) and an inner wall pressure sleeve (4) disposed within the outer sleeve body (3). A pressure oil chamber (5) is provided between the outer sleeve body (3) and the inner wall pressure sleeve (4). An oil inlet passage (6) and an oil outlet passage (7) that are respectively communicated with the pressure oil chamber (5) are provided on the outer sleeve body (3). An oil inlet nozzle (8) is provided in cooperation with the oil inlet passage (6), and an oil outlet nozzle (9) is provided in cooperation with the oil outlet passage (7). A limiting groove (10) is provided at any one side end of the inner wall of the outer sleeve body (3), and an annular protrusion (11) is provided at the other side end. A limiting protrusion (12) is provided on the outer wall of the inner wall pressure sleeve (4) in cooperation with the limiting groove (10). The limiting groove (10) and the limiting protrusion (12), and the annular protrusion (11) and the outer wall of the inner wall pressure sleeve (4) are fixedly fitted through connecting portions respectively. The oil inlet nozzle (8) includes an upper oil inlet (13), a needle valve (14) cooperating with the upper oil inlet (13), a pressure regulating spring (15) disposed at the lower end of the needle valve (14), and a lower oil inlet (16) connected to the oil inlet passage (6). A sealing ring (18) is provided on the outer wall of the oil inlet nozzle (8). The oil inlet nozzle (8) is provided with a boss cooperating with the sealing ring (18). An elastic member (17) is provided between the boss and the sealing ring (18). The material of the elastic member (17) is polyurethane. The oil outlet nozzle (9) includes an oil outlet cavity (19), an oil stopping mechanism cooperating with the oil outlet cavity (19), an upper oil discharge passage (20) and a lower oil discharge passage (21) that are respectively communicated with the oil outlet cavity (19). The lower oil discharge passage (21) is communicated with the oil outlet passage (7). The oil stopping mechanism includes an oil stopping bead (22) disposed within the oil outlet cavity (19), a set screw (23) disposed at the upper end of the oil stopping bead (22), and a sealing screw (24) cooperating with the set screw (23). The upper oil discharge passage (20) is inclined. A drainage inclined surface (25) is provided at the connecting portion between the oil outlet cavity (19) and the upper oil discharge passage (20). Dust caps (26) are provided in cooperation with the upper oil inlet (13) and the upper oil discharge passage (20) respectively.

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