Hydraulic expansion sleeve with precise pressure control

Abstract

The utility model provides a kind of hydraulic expansion sleeve of accurate pressure control.The hydraulic expansion sleeve of accurate pressure control includes: main body, piston, pressure regulating screw, limit screw, plunger, dust plug, fast insertion hydraulic gauge, the main body is composed of outer sleeve and inner sleeve, the outer sleeve and inner sleeve are welded together, the outer sleeve and inner sleeve form closed annular oil cavity between, one plunger hole is provided on the main body and is communicated with oil cavity, one oil injection hole is provided on the main body and is communicated with plunger hole, at least one piston hole is provided on the main body and is communicated with oil cavity, limit screw is equipped on the main body, the piston hole is communicated with oil cavity, the limit screw is located at the outer end of pressure regulating screw.The hydraulic expansion sleeve of accurate pressure control provided by the utility model has the advantages of simple structure, low manufacturing cost, stable operation, high torque density and accurate pressure control.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic locking technology, and in particular relates to a hydraulic expansion sleeve for precise pressure control. Background Technology

[0002] As a fundamental component of mechanical transmission systems, expansion sleeves are widely used in numerous fields, including packaging machinery, food machinery, light industrial machinery, agricultural machinery, metallurgy and mining, petrochemicals, machine tools, automobiles, weaponry, aviation, and power plants. Traditional mechanical expansion sleeves achieve a tight fit with shafts and hubs by compressing a tapered sleeve, causing the inner wall of the sleeve to contract and the outer wall to expand, thereby generating sufficient friction to transmit loads.

[0003] However, with the development of technology and the progress of industry, the industry has placed higher demands on the smoothness of the operation of the expansion sleeve, the ease of assembly, and the high torque density. Traditional mechanical expansion sleeves suffer from problems such as complex processing and manufacturing, difficult installation and disassembly, and low torque density, making them difficult to meet the current needs of the industry. While existing hydraulic expansion sleeves have solved some of the problems to a certain extent, they cannot precisely control the pressure in the oil chamber. When the pressure is too high, it may cause plastic deformation of the hydraulic expansion sleeve, or even cracking of the oil chamber; when the pressure is too low, insufficient torque may occur, or even failure to lock may occur.

[0004] Therefore, it is necessary to provide a new hydraulic expansion sleeve with precise pressure control to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a hydraulic expansion sleeve that has a simple structure, low manufacturing cost, stable operation, high torque density, and precise pressure control.

[0006] To solve the above-mentioned technical problems, the present invention provides a hydraulic expansion sleeve for precise pressure control, comprising: a main body, a piston, a pressure adjusting screw, a limit screw, a plunger, a dust plug, and a quick-connect hydraulic gauge. The main body is composed of an outer sleeve and an inner sleeve, which are welded together to form a sealed annular oil cavity. The main body has a plunger hole communicating with the oil cavity, an oil injection hole communicating with the plunger hole, at least one piston hole communicating with the oil cavity, and a limit screw located at the outer end of the pressure adjusting screw.

[0007] As a further embodiment of this utility model, the piston hole is composed of a smooth hole and a threaded hole, the smooth hole cooperating with the piston, and the threaded hole cooperating with the pressure adjusting screw.

[0008] As a further embodiment of this utility model, the plunger is provided with a spherical surface that mates with the conical surface of the plunger hole, the plunger is provided with a cylindrical surface that mates with the smooth hole of the plunger hole, the plunger is provided with a sealing ring, and the plunger is provided with a thread that mates with the threaded hole of the plunger hole.

[0009] As a further embodiment of this utility model, the piston is provided with a cylindrical surface that mates with a hole in the piston bore, and the piston is provided with a sealing ring.

[0010] As a further embodiment of this utility model, the quick-connect hydraulic gauge is provided with two sealing rings, and an oil inlet is provided on the quick-connect hydraulic gauge, with the oil inlet located between the two sealing rings. The quick-connect hydraulic gauge is also provided with a vent hole.

[0011] As a further embodiment of this utility model, the dust plug is provided with two sealing rings, an oil outlet is provided on the dust plug and the oil outlet is located between the two sealing rings, and the dust plug is provided with a vent hole.

[0012] Compared with related technologies, the hydraulic expansion sleeve with precise pressure control provided by this utility model has the following beneficial effects: This invention, by incorporating a pressure adjusting screw, piston, and quick-connect hydraulic gauge, can precisely control the pressure within the oil chamber, preventing excessive pressure from causing plastic deformation of the expansion sleeve or cracking of the oil chamber, and insufficient pressure from causing insufficient torque or inability to lock. The overall structure is simple, composed of multiple basic components, resulting in low manufacturing costs. During operation, force is transmitted through the hydraulic medium, ensuring smooth load transfer and high torque density. Furthermore, the processes of oil injection, pressure adjustment, operation, and disassembly are simple, facilitating installation and maintenance, and making it suitable for various industrial fields. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 A three-dimensional structural diagram of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 2 A structural diagram of the main body of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 3 A diagram showing the plunger hole structure of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 4 A diagram showing the piston hole structure of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 5 A piston structure diagram of a hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 6A piston structure diagram of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 7 A structural diagram of a quick-connect pressure gauge for a hydraulic expansion sleeve that provides precise pressure control, as provided by this utility model. Figure 8 A structural diagram of the dust plug for a hydraulic expansion sleeve with precise pressure control provided by this utility model; Figure 9 A schematic diagram showing the oil injection process of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 10 A schematic diagram showing the fitting of the hydraulic expansion sleeve for precise pressure control provided by this utility model during pressure adjustment; Figure 11 A schematic diagram showing the working fit of the hydraulic expansion sleeve for precise pressure control provided by this utility model; Figure 12 A schematic diagram of the disassembly of the hydraulic expansion sleeve for precise pressure control provided by this utility model.

[0015] In the diagram: 1. Main body; 11. Outer sleeve; 12. Inner sleeve; 13. Plunger hole; 131. Conical surface; 132. Smooth hole; 133. Threaded hole; 14. Oil injection hole; 15. Threaded hole; 16. Piston hole; 161. Smooth hole; 162. Threaded hole; 17. Oil chamber; 2. Plunger; 21. Spherical surface; 22. Sealing ring; 23. Cylindrical surface; 24. Thread; 3. Quick-connect hydraulic gauge; 31. Sealing ring; 32. Cylindrical surface; 33. Dial body; 34. Oil inlet; 35. Vent hole; 4. Limit screw; 5. Pressure adjusting screw; 6. Piston; 61. Sealing ring; 62. Cylindrical surface; 7. Dust plug; 71. Sealing ring; 72. Cylindrical surface; 73. Threaded hole; 74. Oil outlet; 75. Vent hole. Detailed Implementation

[0016] Please refer to the following: Figures 1 to 12 The hydraulic expansion sleeve for precise pressure control includes: a main body 1, a piston 6, a pressure adjusting screw 5, a limit screw 4, a plunger 2, a dust plug 7, and a quick-connect hydraulic gauge 3. The main body 1 is composed of an outer sleeve 11 and an inner sleeve 12, which are welded together, forming a closed annular oil cavity 17 between them. The main body 1 has a plunger hole 13 communicating with the oil cavity 17, an oil injection hole 14 communicating with the plunger hole 13, and at least one piston hole 16 communicating with the oil cavity 17. The main body 1 is equipped with a limit screw 4, which communicates with the oil cavity 17. The limit screw 4 is located at the outer end of the pressure adjusting screw 5.

[0017] like Figure 4As shown, the piston hole 16 is composed of a smooth hole 161 and a threaded hole 162. The smooth hole 161 is engaged with the piston 6, and the threaded hole 162 is engaged with the pressure adjusting screw 5.

[0018] like Figure 5 As shown, the plunger 2 is provided with a spherical surface 21 that mates with the conical surface 131 of the plunger hole 13, a cylindrical surface 23 that mates with the open hole 132 of the plunger hole 13, a sealing ring 22, and a thread 24 that mates with the threaded hole 133 of the plunger hole 13.

[0019] like Figure 6 As shown, the piston 6 is provided with a cylindrical surface 62 that mates with the light hole 161 of the piston hole 16, and the piston 6 is provided with a sealing ring 61.

[0020] like Figure 7 As shown, the quick-connect hydraulic gauge 3 is provided with two sealing rings 31, and the quick-connect hydraulic gauge 3 is provided with an oil inlet 34, which is located between the two sealing rings 31. The quick-connect hydraulic gauge 3 is provided with a vent hole 35.

[0021] like Figure 8 As shown, the dust plug 7 is provided with two sealing rings 71, and the dust plug 7 is provided with an oil outlet 74, which is located between the two sealing rings 71. The dust plug 7 is provided with a vent hole 75.

[0022] The working principle of the hydraulic expansion sleeve for precise pressure control provided by this utility model is as follows: When the hydraulic expansion sleeve needs to be filled with oil, turn the pressure adjusting screw 5 outward until it contacts the limit screw 4. First, tighten the plunger 2, and then turn it outward half a turn. The cylindrical surface 23 of the plunger 2 and the smooth hole 132 of the plunger hole 13 are still in a mating state. The spherical surface 21 of the plunger 2 and the conical surface 131 of the plunger hole 13 are separated. The dust plug 7 is connected to the oil chamber 17. After the dust plug 7 is connected to the oil filling pipe, the hydraulic medium enters the oil chamber 17 through the oil filling hole 14. After the hydraulic medium is filled, tighten the plunger 2. The spherical surface 21 of the plunger 2 and the conical surface 131 of the plunger hole 13 are mated. The dust plug 7 is disconnected from the oil chamber 17. Remove the oil filling pipe to complete the oil filling.

[0023] When the hydraulic expansion sleeve needs pressure adjustment, remove the dust plug 7, insert the quick-connect hydraulic gauge 3 into the oil filling hole 14, first tighten the plunger 2, then turn it outward half a turn. The cylindrical surface 23 of the plunger 2 and the smooth hole 132 of the plunger hole 13 are still in a mating state, while the spherical surface 21 of the plunger 2 and the conical surface 131 of the plunger hole 13 are separated. The quick-connect hydraulic gauge 3 is connected to the oil chamber 17. Tighten the pressure adjusting screw 5. Tightening the pressure adjusting screw 5 inward will increase the pressure, and turning it outward will decrease the pressure. Tightening the pressure adjusting screw 5 will drive the piston 6 to move inward / outward, increasing / decreasing the pressure of the hydraulic medium. When the pressure value of the hydraulic gauge 3 reaches the required value, stop turning the pressure adjusting screw 5, tighten the plunger 2, and the spherical surface 21 of the plunger 2 and the conical surface 131 of the plunger hole 13 are fully engaged. The hydraulic gauge 3 is disconnected from the oil chamber 17. Remove the quick-connect hydraulic gauge 3 to complete the pressure adjustment.

[0024] When the hydraulic expansion sleeve is working, after adjusting the pressure, insert the dust plug 7 into the oil filling hole 14. The outer sleeve 11 and the inner sleeve 12 undergo elastic deformation under the pressure of the hydraulic medium. The outer sleeve 11 expands to form an interference fit with the outer hub, and the inner sleeve 12 contracts to form an interference fit with the shaft. This completes the load transfer.

[0025] When the hydraulic expansion sleeve is disassembled, the pressure adjusting screw 5 is turned outward, and the piston 6 moves outward with the pressure adjusting screw 5. The pressure of the hydraulic medium in the oil chamber 17 gradually decreases until it disappears. The outer sleeve 11 and the inner sleeve 12 also quickly and elastically return to their initial state. There is a gap between the hydraulic expansion sleeve and the shaft and outer hub, which can be easily disassembled.

[0026] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A hydraulic expansion sleeve for precise pressure control, characterized in that, include: The system comprises a main body, a piston, a pressure adjusting screw, a limit screw, a plunger, a dust plug, and a quick-connect hydraulic gauge. The main body consists of an outer sleeve and an inner sleeve, which are welded together to form a closed annular oil cavity. The main body has a plunger hole communicating with the oil cavity, an oil injection hole communicating with the plunger hole, at least one piston hole communicating with the oil cavity, and a limit screw located at the outer end of the pressure adjusting screw.

2. The hydraulic expansion sleeve for precise pressure control according to claim 1, characterized in that: The piston hole consists of a smooth hole and a threaded hole. The smooth hole mates with the piston, and the threaded hole mates with the pressure adjusting screw.

3. The hydraulic expansion sleeve for precise pressure control according to claim 1, characterized in that: The plunger is provided with a spherical surface that mates with the conical surface of the plunger hole, a cylindrical surface that mates with the smooth surface of the plunger hole, a sealing ring, and a thread that mates with the threaded hole of the plunger hole.

4. The hydraulic expansion sleeve for precise pressure control according to claim 1, characterized in that: The piston is provided with a cylindrical surface that mates with a hole in the piston bore, and the piston is provided with a sealing ring.

5. A hydraulic expansion sleeve for precise pressure control according to claim 1, characterized in that: The quick-connect hydraulic gauge has two sealing rings, an oil inlet is provided on the quick-connect hydraulic gauge and the oil inlet is located between the two sealing rings, and the quick-connect hydraulic gauge has a vent hole.

6. A hydraulic expansion sleeve for precise pressure control according to claim 1, characterized in that: The dust plug has two sealing rings, an oil outlet is provided on the dust plug and the oil outlet is located between the two sealing rings, and the dust plug has a vent hole.

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