Hydraulic expansion sleeve stable in connection

Abstract

The invention discloses a hydraulic expansion sleeve stable in connection, and relates to the technical field of expansion sleeves, the hydraulic expansion sleeve comprises a left shaft sleeve, a right shaft sleeve, a rotating shaft and a serpentine spring, the outer side of the left shaft sleeve is sleeved with a left sleeve shell, the outer side of the right shaft sleeve is sleeved with a right sleeve shell, and the hydraulic expansion sleeve further comprises a fixing assembly arranged in the left shaft sleeve and the right shaft sleeve; a hydraulic assembly is arranged on one side of the interior of the left shaft sleeve, and a hydraulic assembly is arranged on one side of the interior of the right shaft sleeve. The left connecting part is fixedly connected to one side of the left shaft sleeve, the right connecting part is fixedly connected to the side, close to the left shaft sleeve, of the right shaft sleeve, and the fixing assembly comprises a groove and a mounting sleeve. Therefore, the abutting friction force between the expansion sleeve and the shaft sleeve and the connecting shaft is weakened, and the connecting effect and the using stability of the expansion sleeve coupler are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of expansion sleeves, in particular to a hydraulic expansion sleeve with a stable connection. Background Art

[0002] Couplings are used to connect two shafts in transmission equipment to transmit torque. Traditional couplings and shafts are generally connected by key or interference fit. Key or interference fit connections are generally installed by heating the coupling during installation, and a puller is required for disassembly. Installation and disassembly are time-consuming and labor-intensive. One existing technology uses expansion sleeves to achieve cold installation. The expansion sleeves are installed on the opposite end faces of the two half couplings to improve installation convenience.

[0003] For example, an improved expansion sleeve type serpentine spring coupling with publication number CN203516504U is characterized in that an outer ring, a first inner ring, a second inner ring and bolts are provided in the active joint and the driven joint, the outer wall of the outer ring is cylindrical, and an isolation belt is provided in the middle of the inner wall of the outer ring. The inner walls on both sides of the isolation belt are conical with a larger outer side and a smaller inner side and are symmetrical, and a first inner ring and a second inner ring are provided on both sides of the isolation belt inside the outer ring. The bolts pass through the first inner ring and the isolation belt in turn and are threadedly connected to the second inner ring. The side walls of the outer ring, the first inner ring and the second inner ring are provided with notches along the busbar direction, which facilitates installation and disassembly while the interference tension connection is firm and reliable. However, the expansion sleeve is only fixed by bolts. After long-term use, there may be an unstable connection between the bolts and the expansion sleeve, which causes the abutment friction between the expansion sleeve and the shaft sleeve and the connecting shaft to be weakened, thereby reducing the connection effect and use stability of the expansion sleeve coupling, and has certain limitations.

[0004] Therefore, we propose a hydraulic expansion sleeve with a stable connection to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic expansion sleeve with a stable connection, so as to solve the problem that when only fixed by bolts, the connection between the bolts and the expansion sleeve may be unstable after long-term use, thereby causing the abutment friction force between the expansion sleeve and the shaft sleeve and the connecting shaft to be weakened, thereby reducing the connection effect and use stability of the expansion sleeve coupling.

[0006] To achieve the above object, the present invention provides the following technical solution: a hydraulic expansion sleeve with stable connection, comprising a left shaft sleeve, a right shaft sleeve, a rotating shaft and a serpentine spring, wherein the outer side of the left shaft sleeve is sleeved with a left sleeve shell, and the outer side of the right shaft sleeve is sleeved with a right sleeve shell; Also includes: A fixed component is arranged inside the left shaft sleeve and the right shaft sleeve, wherein a hydraulic component is arranged on one side of the interior of the left shaft sleeve, and a hydraulic component is arranged on one side of the interior of the right shaft sleeve; The left connecting part is fixedly connected to one side of the left shaft sleeve, the right shaft sleeve is fixedly connected to the right connecting part on one side close to the left shaft sleeve, and the serpentine spring is clamped and installed inside the left connecting part and the right connecting part; The fixing assembly comprises a groove and a mounting sleeve, a fixing bolt is symmetrically mounted on one side of the mounting sleeve, the fixing bolt is slidably connected to the mounting sleeve, an expansion sleeve body is mounted on the inner side of the groove, the outer side of the mounting sleeve close to the expansion sleeve body is conical and tilted upward along the direction of the fixing bolt, the bottom of the expansion sleeve body is tilted, a thread groove is provided inside the expansion sleeve body, and the fixing bolt is threadedly connected to the thread groove; A connecting block is fixedly connected to the side of the expansion sleeve body away from the fixing bolt, the top of the connecting block is inclined, a sliding groove is provided on the side of the left sleeve close to the left connecting part, a sliding rod is fixedly connected to the inside of the sliding groove laterally, the connecting block is slidably connected to the sliding rod, a connecting plate is installed on one side of the left connecting part, and an elastic tooth block is fixedly connected to the side of the connecting plate close to the connecting block; The connecting block is fixedly connected to a mounting block on one side away from the connecting plate, a vertical groove is provided on one side inside the mounting block, a bottom rod is slidably connected to the lower part of the vertical groove, a bottom pressure block is fixedly connected to one end of the bottom rod away from the connecting block, a spring 1 is sleeved on the outer side of the bottom rod, the top of the spring 1 is fixedly connected to the mounting block, a side rod is slidably connected to one side of the vertical groove, and an abutment plate is symmetrically fixedly connected to the inner side wall of the groove; The outer side of the side rod is sleeved with a second spring, and the second spring is located outside the mounting block. The top of the bottom rod is inclined, and the side of the side rod close to the bottom rod is inclined. The side rod is in contact with the bottom rod, and a conical portion is fixedly connected to the side of the mounting sleeve close to the expansion sleeve body.

[0007] Preferably, the groove is opened in a circle, the fixing bolts are arranged in an array, a plurality of the expansion sleeve bodies are arranged in the array, the expansion sleeve bodies are not less than four, and the inclination angle of the bottom of the expansion sleeve body is the same as the inclination angle of the installation sleeve.

[0008] By adopting the above technical solution, when the expansion sleeve body moves, the expansion sleeve body drives the connecting block to slide on the sliding rod, and the inclined portion at one end of the connecting block moves on the elastic tooth block. The elastic tooth block can limit the connecting block. The movement of the connecting block will also drive the installation block at the bottom to move, so that the side rods on both sides can be tightly pressed against the tapered portion. The pressing portion of the side rods is made of rubber, thereby further improving the blocking effect of the expansion sleeve body and improving the connection stability of the rotating shaft.

[0009] Preferably, the connecting block is slidably connected to the slide groove, the connecting block is L-shaped, the connecting plate is fixedly connected to the left connecting part by bolts, and the number of the connecting plates corresponds to the connecting block.

[0010] By adopting the above technical solution, the elastic tooth block plays a locking role, thereby limiting the expansion sleeve body and preventing the expansion sleeve body from retreating, further improving the tightening effect of the expansion sleeve body. During subsequent disassembly, the bolts on the connecting plate can be unscrewed to remove the connecting plate.

[0011] Preferably, the mounting blocks are symmetrically arranged, two mounting blocks are arranged, the spring 1 is located outside the mounting block, and the bottom end of the spring 1 is fixedly connected to the top of the bottom pressure block.

[0012] By adopting the above technical solution, due to the conical inclined surface of the conical part, the bottom pressure block is squeezed and lifted, the bottom pressure block compresses spring 1, and the bottom pressure block drives the bottom rod to rise, and the top end of the bottom rod squeezes the inclined surface of one end of the side rod to increase the abutting friction force.

[0013] Preferably, the bottom of the bottom pressure block is arc-shaped, the bottom of the bottom pressure block fits against the outer side of the conical portion, a stop block is fixedly connected to the side of the side rod away from the bottom rod, one end of the spring two is fixedly connected to the mounting block, and the other end of the spring two is fixedly connected to the stop block.

[0014] By adopting the above technical solution, when the expansion sleeve body and the installation sleeve are tightly abutted, the side rods on both sides are tightly abutted against the tapered portion, and the side rod abutting portion is made of rubber, thereby further improving the blocking effect on the expansion sleeve body.

[0015] Preferably, the abutment plates are symmetrically arranged on both sides of the connection block, and the distance between two adjacent side rods is not less than the width dimension of the expansion sleeve body.

[0016] By adopting the above technical solution, the expansion sleeve body can slide between the connecting blocks without blocking the movement of the expansion sleeve body.

[0017] Preferably, the rotating shaft fits in with the interior of the mounting sleeve, and the rotating shaft fits in with the inner wall of the tapered portion.

[0018] By adopting the above technical solution, it is convenient to tighten and fix the rotating shaft through the installation sleeve and the tapered part.

[0019] Preferably, the hydraulic assembly includes an annular tube and a one-way valve, the annular tube is located inside the groove on one side close to the connecting block, the inner ring of the annular tube is tightly abutted against the outer side of the conical portion, the top side of the annular tube is connected to a connecting tube, and the connecting tube passes through the left casing and is connected to an oil filling port.

[0020] By adopting the above technical solution, the assembly of the coupling is completed, and then the left sleeve and the right sleeve are respectively put on the left shaft sleeve and the right shaft sleeve, and after fixing them with bolts, hydraulic oil is added through the oil filling port. The injected hydraulic oil enters the annular tube, which is convenient for further tightening the tapered part.

[0021] Preferably, the connecting pipe is communicated with the annular pipe, the one-way valve is installed on one side of the upper portion of the connecting pipe, and the one-way valve is located on the outer side of the left casing.

[0022] By adopting the above technical solution, the one-way valve can be unidirectional to avoid the backflow of hydraulic oil.

[0023] Compared with the prior art, the present invention has the following beneficial effects: a fixing assembly is provided, and when the expansion sleeve body moves, the expansion sleeve body drives the connecting block to slide on the sliding rod, and the inclined portion at one end of the connecting block moves on the elastic tooth block, and the elastic tooth block can limit the connecting block, thereby limiting the expansion sleeve body, preventing the expansion sleeve body from retreating, and further improving the tightening effect of the expansion sleeve body. The movement of the connecting block will also drive the installation block at the bottom to move, so that the side rods on both sides can be pressed against the tapered portion, and the pressing portion of the side rod is made of rubber, thereby further improving the blocking effect of the expansion sleeve body, improving the connection stability of the rotating shaft, and also improving the use effect of the device; 1. A fixing component is provided. By tightening the fixing bolt, the fixing bolt is threadedly connected with the thread groove, so that the expansion sleeve body moves toward the installation sleeve, the expansion sleeve body tightens the left shaft sleeve and the installation sleeve, and the installation sleeve presses the rotating shaft to realize the installation and fixation of the rotating shaft. The bottom surface of the expansion sleeve body is set in an arc shape, which is convenient for close contact with the installation sleeve. When the expansion sleeve body moves, the expansion sleeve body drives the connecting block to slide on the slide rod, and the inclined part of one end of the connecting block moves on the elastic tooth block. The elastic tooth block can limit the connecting block, thereby limiting the expansion sleeve body to prevent the expansion sleeve body from retreating, further improving the tensioning effect of the expansion sleeve body, and the movement of the connecting block will also drive the installation block at the bottom to move, and the installation block slides on the tapered part. Due to the tapered shape of the tapered part The inclined surface causes the bottom pressure block to be squeezed and raised, and the bottom pressure block compresses spring 1, and the bottom pressure block drives the bottom rod to rise, and the top end of the bottom rod squeezes the inclined surface of one end of the side rod, so that the side rod moves outward until the expansion sleeve body and the installation sleeve are tightly abutted, and the side rods on both sides are tightly abutted against the tapered part, and the side rod abutting part is made of rubber material, thereby further improving the blocking effect of the expansion sleeve body, improving the connection stability of the rotating shaft, and also improving the use effect of the device, and solving the problem that the bolt and the expansion sleeve may be unstable after long-term use when only fixed by bolts, thereby causing the abutment friction between the expansion sleeve and the shaft sleeve and the connecting shaft to be weakened, reducing the connection effect and use stability of the expansion sleeve coupling; 2. A hydraulic assembly is provided. After the rotating shafts on both sides are installed through the fixing assembly, the left connecting part and the corresponding right connecting part are fitted together, and then the serpentine spring is installed inside the left connecting part and the right connecting part to complete the assembly of the coupling. Then the left sleeve and the right sleeve are respectively sleeved on the left shaft sleeve and the right shaft sleeve. After fixing them with bolts, hydraulic oil is added through the oil filling port. The one-way valve can conduct unidirectionally to avoid the backflow of hydraulic oil. The injected hydraulic oil enters the annular tube, which is located on the outer ring of the tapered part. The hydraulic oil presses the tapered part through the annular tube, thereby assisting in improving the pressing force of the tapered part and making the connection of the expansion sleeve body more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of the left shaft sleeve of the present invention; Figure 2 It is a schematic diagram of the three-dimensional overall structure of the present invention; Figure 3 It is a schematic diagram of the overall explosion structure of the present invention; Figure 4 This is a schematic diagram of the installation structure of the serpentine spring of the present invention; Figure 5 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 6 For the present invention Figure 1 The enlarged structural diagram at B in the middle; Figure 7 This is a schematic diagram of the abutment plate installation structure of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the mounting block of the present invention; Fig. 9 For the present invention Figure 7 The enlarged structural diagram at C in the middle; Fig.10 This is a schematic diagram of the three-dimensional structure of the installation sleeve of the present invention; Fig.11 It is a schematic diagram of the installation structure of the expansion sleeve body of the present invention.

[0025] In the figure: 1. left sleeve; 2. right sleeve; 3. rotating shaft; 4. left sleeve shell; 5. right sleeve shell; 6. fixing assembly; 61. groove; 62. mounting sleeve; 63. fixing bolt; 64. expansion sleeve body; 65. connecting block; 66. slide groove; 67. slide rod; 68. connecting plate; 69. elastic tooth block; 610. mounting block; 611. vertical groove; 612. bottom rod; 613. bottom pressure block; 614. spring 1; 615. side rod; 616. spring 2; 617. abutment plate; 618. threaded groove; 619. tapered part; 7. hydraulic assembly; 71. annular tube; 72. connecting pipe; 73. one-way valve; 74. oil filling port; 8. left connecting part; 9. right connecting part; 10. serpentine spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-11 The present invention provides a technical solution: a hydraulic expansion sleeve with a stable connection, comprising a left sleeve 1, a right sleeve 2, a rotating shaft 3 and a serpentine spring 10, the outer side of the left sleeve 1 is sleeved with a left sleeve shell 4, and the outer side of the right sleeve 2 is sleeved with a right sleeve shell 5; A fixing assembly 6 is arranged inside the left shaft sleeve 1 and the right shaft sleeve 2; The left connecting part 8 is fixedly connected to one side of the left shaft sleeve 1, and the right connecting part 9 is fixedly connected to the side of the right shaft sleeve 2 close to the left shaft sleeve 1, and the serpentine spring 10 is clamped and installed inside the left connecting part 8 and the right connecting part 9; The fixing assembly 6 includes a groove 61 and a mounting sleeve 62. A fixing bolt 63 is symmetrically installed on one side of the mounting sleeve 62. The fixing bolt 63 is slidably connected to the mounting sleeve 62. An expansion sleeve body 64 is installed on the inner side of the groove 61. The outer side of the mounting sleeve 62 close to the expansion sleeve body 64 is conical and tilted upward along the direction of the fixing bolt 63. The bottom of the expansion sleeve body 64 is tilted. A threaded groove 618 is opened inside the expansion sleeve body 64. The fixing bolt 63 is threadedly connected to the threaded groove 618. The groove 61 is circular, the fixing bolts 63 are arranged in an array, a plurality of expansion sleeve bodies 64 are arranged in an array, and there are no less than four expansion sleeve bodies 64 . The inclination angle of the bottom of the expansion sleeve body 64 is the same as the inclination angle of the installation sleeve 62 .

[0028] The rotating shaft 3 fits in with the interior of the mounting sleeve 62 , and the rotating shaft 3 fits in with the inner wall of the tapered portion 619 .

[0029] A connecting block 65 is fixedly connected to the side of the expansion sleeve body 64 away from the fixing bolt 63, and the top of the connecting block 65 is inclined. A sliding groove 66 is provided on the side of the left sleeve 1 close to the left connecting part 8, and a sliding rod 67 is fixedly connected to the inside of the sliding groove 66 in the horizontal direction. The connecting block 65 is slidably connected to the sliding rod 67, and a connecting plate 68 is installed on one side of the left connecting part 8. An elastic tooth block 69 is fixedly connected to the side of the connecting plate 68 close to the connecting block 65.

[0030] The connecting block 65 is slidably connected to the slide groove 66 . The connecting block 65 is L-shaped. The connecting plate 68 is fixedly connected to the left connecting part 8 by bolts. The number of the connecting plates 68 corresponds to that of the connecting block 65 .

[0031] A mounting block 610 is fixedly connected to one side of the connecting block 65 away from the connecting plate 68, a vertical groove 611 is provided on one side of the inner part of the mounting block 610, a bottom rod 612 is slidably connected to the lower part of the vertical groove 611, a bottom pressure block 613 is fixedly connected to one end of the bottom rod 612 away from the connecting block 65, a spring 614 is sleeved on the outer side of the bottom rod 612, a top end of the spring 614 is fixedly connected to the mounting block 610, a side rod 615 is slidably connected to one side of the vertical groove 611, and an abutment plate 617 is symmetrically fixedly connected to the inner side wall of the groove 61.

[0032] The mounting blocks 610 are symmetrically arranged. Two mounting blocks 610 are arranged. The spring 1 614 is located outside the mounting block 610 . The bottom end of the spring 1 614 is fixedly connected to the top of the bottom pressure block 613 .

[0033] The outer side of the side rod 615 is sleeved with a spring 2 616, which is located outside the mounting block 610. The top of the bottom rod 612 is tilted, and the side of the side rod 615 close to the bottom rod 612 is tilted. The side rod 615 is in contact with the bottom rod 612, and the mounting sleeve 62 is fixedly connected with a conical portion 619 on one side close to the expansion sleeve body 64.

[0034] The bottom of the bottom pressure block 613 is arc-shaped, and the bottom of the bottom pressure block 613 fits against the outer side of the conical portion 619. The side rod 615 is fixedly connected with a stop block on the side away from the bottom rod 612. One end of the spring 616 is fixedly connected to the mounting block 610, and the other end of the spring 616 is fixedly connected to the stop block.

[0035] The abutment plates 617 are symmetrically arranged on both sides of the connection block 65 , and the distance between two adjacent side rods 615 is not less than the width dimension of the expansion sleeve body 64 .

[0036] Embodiment 1: Figure 1-2 and Figure 5-11 As shown, a fixing component 6 is provided. When the device is used, the rotating shaft 3 is first inserted into the interior of the left shaft sleeve 1 and the right shaft sleeve 2, and the mounting sleeve 62 is inserted into the groove 61, and the mounting sleeve 62 is sleeved on the outer side of one end of the rotating shaft 3, so that the expansion sleeve body 64 is located between the left shaft sleeve 1 and the mounting sleeve 62, and the position of the expansion sleeve body 64 is adjusted to correspond to the fixing bolt 63 on the mounting sleeve 62, and then the fixing bolt 63 is tightened, and the fixing bolt 63 is threadedly connected with the thread groove 618, so that the expansion sleeve body 64 moves toward the mounting sleeve 62, and the expansion sleeve body 64 tightens the left shaft sleeve 1 and the mounting sleeve 62, and the mounting sleeve 62 presses the rotating shaft 3 to realize the installation and fixation of the rotating shaft 3. The bottom surface of the expansion sleeve body 64 is arc-shaped, which is convenient for close contact with the mounting sleeve 62.

[0037] When the expansion sleeve body 64 moves, the expansion sleeve body 64 drives the connecting block 65 to slide on the slide rod 67. The inclined portion at one end of the connecting block 65 moves on the elastic tooth block 69. The elastic tooth block 69 can limit the connecting block 65, thereby limiting the expansion sleeve body 64 to prevent the expansion sleeve body 64 from retreating, further improving the tightening effect of the expansion sleeve body 64. The movement of the connecting block 65 will also drive the bottom mounting block 610 to move. The mounting block 610 slides on the tapered portion 619. Due to the tapered inclined surface of the tapered portion 619, the bottom pressure block 613 is squeezed and lifted, and the bottom pressure block 613 compresses the spring 1 614.

[0038] The bottom pressure block 613 will drive the bottom rod 612 to rise, and the top end of the bottom rod 612 will squeeze the inclined surface of one end of the side rod 615, so that the side rod 615 moves outward until the expansion sleeve body 64 and the installation sleeve 62 are tightly abutted, and the side rods 615 on both sides are tightly abutted against the tapered portion 619. The abutting portion of the side rod 615 is made of rubber, which further improves the blocking effect on the expansion sleeve body 64, improves the connection stability of the rotating shaft 3, and also improves the use effect of the device, and solves the problem that the connection between the bolts and the expansion sleeve may be unstable after long-term use when only fixed by bolts, thereby causing the abutment friction between the expansion sleeve and the shaft sleeve and the connecting shaft to be weakened, thereby reducing the connection effect and use stability of the expansion sleeve coupling.

[0039] A hydraulic component 7 is disposed on one side of the interior of the left sleeve 1 , and a hydraulic component 7 is disposed on one side of the interior of the right sleeve 2 .

[0040] The hydraulic assembly 7 includes an annular tube 71 and a one-way valve 73. The annular tube 71 is located inside the groove 61 on one side close to the connecting block 65. The inner ring of the annular tube 71 is tightly pressed against the outer side of the conical portion 619. A connecting tube 72 is connected to the top side of the annular tube 71. The connecting tube 72 passes through the left housing 4 and is connected to an oil filling port 74.

[0041] The connecting pipe 72 is connected to the annular pipe 71 . The one-way valve 73 is installed on one side of the upper portion of the connecting pipe 72 . The one-way valve 73 is located on the outer side of the left housing 4 .

[0042] Embodiment 2: Figure 3-4 As shown, a hydraulic component 7 is provided. After the rotating shafts 3 on both sides are installed through the fixing components 6, the left connecting part 8 and the corresponding right connecting part 9 are fitted together, and then the serpentine spring 10 is installed inside the left connecting part 8 and the right connecting part 9 to complete the assembly of the coupling.

[0043] The left sleeve 4 and the right sleeve 5 are respectively sleeved on the left shaft sleeve 1 and the right shaft sleeve 2, and fixed with bolts, and then hydraulic oil is added through the oil filling port 74. The one-way valve 73 can be unidirectional to avoid the backflow of the hydraulic oil. The injected hydraulic oil enters the annular tube 71, and the annular tube 71 is located on the outer ring of the tapered part 619. The hydraulic oil presses the tapered part 619 through the annular tube 71, thereby helping to increase the pressing force of the tapered part 619, making the connection of the expansion sleeve body 64 more stable.

[0044] Working principle: When using the device, first, Figure 1-11 As shown, the rotating shaft 3 is inserted into the interior of the left shaft sleeve 1 and the right shaft sleeve 2, and the mounting sleeve 62 is inserted into the groove 61, and the mounting sleeve 62 is sleeved on the outer side of one end of the rotating shaft 3, so that the expansion sleeve body 64 is located between the left shaft sleeve 1 and the mounting sleeve 62, and the position of the expansion sleeve body 64 is adjusted to correspond to the fixing bolt 63 on the mounting sleeve 62, and then the fixing bolt 63 is tightened, and the fixing bolt 63 is threadedly connected with the thread groove 618, so that the expansion sleeve body 64 moves toward the mounting sleeve 62, and the expansion sleeve body 64 tightens the left shaft sleeve 1 and the mounting sleeve 62, and the mounting sleeve 62 presses the rotating shaft 3 to achieve the installation and fixation of the rotating shaft 3, and the bottom surface of the expansion sleeve body 64 is arc-shaped, which is convenient for close contact with the mounting sleeve 62.

[0045] When the expansion sleeve body 64 moves, the expansion sleeve body 64 drives the connecting block 65 to slide on the slide rod 67. The inclined portion at one end of the connecting block 65 moves on the elastic tooth block 69. The elastic tooth block 69 can limit the connecting block 65, thereby limiting the expansion sleeve body 64 to prevent the expansion sleeve body 64 from retreating, further improving the tensioning effect of the expansion sleeve body 64. The movement of the connecting block 65 will also drive the installation block 610 at the bottom to move, and the installation block 610 slides on the tapered portion 619.

[0046] Due to the conical inclined surface of the conical portion 619, the bottom pressure block 613 is squeezed and lifted, and the bottom pressure block 613 compresses the spring 1 614, and the bottom pressure block 613 drives the bottom rod 612 to rise, and the top end of the bottom rod 612 squeezes the inclined surface of one end of the side rod 615, so that the side rod 615 moves outward until the expansion sleeve body 64 and the installation sleeve 62 are tightly pressed together, and the side rods 615 on both sides are pressed together with the conical portion 619, and the pressing part of the side rod 615 is made of rubber, thereby further improving the blocking effect on the expansion sleeve body 64 and improving the connection stability of the rotating shaft 3.

[0047] After the rotating shafts 3 on both sides are installed through the fixing components 6, the left connecting part 8 and the corresponding right connecting part 9 are fitted together, and then the serpentine spring 10 is installed inside the left connecting part 8 and the right connecting part 9 to complete the assembly of the coupling, and then the left sleeve 4 and the right sleeve 5 are respectively sleeved on the left shaft sleeve 1 and the right shaft sleeve 2. After fixing them with bolts, hydraulic oil is added through the oil filling port 74. The one-way valve 73 can be unidirectional to avoid the backflow of hydraulic oil. The injected hydraulic oil enters the annular tube 71, and the annular tube 71 is located on the outer ring of the tapered part 619. The hydraulic oil presses the tapered part 619 through the annular tube 71, thereby helping to increase the clamping force of the tapered part 619, making the connection of the expansion sleeve body 64 more stable.

[0048] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic expansion sleeve with a stable connection, comprising a left shaft sleeve (1), a right shaft sleeve (2), a rotating shaft (3) and a serpentine spring (10), wherein the outer side of the left shaft sleeve (1) is sleeved with a left sleeve shell (4), and the outer side of the right shaft sleeve (2) is sleeved with a right sleeve shell (5); It is characterized in that Also includes: A fixing component (6) is arranged inside the left shaft sleeve (1) and the right shaft sleeve (2), wherein a hydraulic component (7) is arranged on one side inside the left shaft sleeve (1), and a hydraulic component (7) is arranged on one side inside the right shaft sleeve (2); A left connecting portion (8) is fixedly connected to one side of the left shaft sleeve (1); a right connecting portion (9) is fixedly connected to one side of the right shaft sleeve (2) close to the left shaft sleeve (1); and the serpentine spring (10) is mounted in engagement with the inside of the left connecting portion (8) and the right connecting portion (9); The fixing assembly (6) comprises a groove (61) and a mounting sleeve (62); a fixing bolt (63) is symmetrically mounted on one side of the mounting sleeve (62); the fixing bolt (63) is slidably connected to the mounting sleeve (62); an expansion sleeve body (64) is mounted on the inner side of the groove (61); the outer side of the mounting sleeve (62) close to the expansion sleeve body (64) is conically arranged and tilted upward along the direction of the fixing bolt (63); the bottom of the expansion sleeve body (64) is tilted; a thread groove (618) is provided inside the expansion sleeve body (64); and the fixing bolt (63) is threadedly connected to the thread groove (618); A connecting block (65) is fixedly connected to the side of the expansion sleeve body (64) away from the fixing bolt (63), the top of the connecting block (65) is inclined, a sliding groove (66) is provided on the side of the left shaft sleeve (1) close to the left connecting portion (8), a sliding rod (67) is fixedly connected to the inside of the sliding groove (66) in a transverse manner, the connecting block (65) is slidably connected to the sliding rod (67), a connecting plate (68) is installed on one side of the left connecting portion (8), and an elastic tooth block (69) is fixedly connected to the side of the connecting plate (68) close to the connecting block (65); A mounting block (610) is fixedly connected to one side of the connecting block (65) away from the connecting plate (68); a vertical groove (611) is provided on one side of the interior of the mounting block (610); a bottom rod (612) is slidably connected to the lower part of the vertical groove (611); an end of the bottom rod (612) away from the connecting block (65) is fixedly connected to a bottom pressure block (613); a spring 1 (614) is sleeved on the outer side of the bottom rod (612); a top end of the spring 1 (614) is fixedly connected to the mounting block (610); a side rod (615) is slidably connected to one side of the vertical groove (611); and an abutment plate (617) is symmetrically fixedly connected to the inner side wall of the groove (61); The outer side of the side rod (615) is sleeved with a second spring (616), the second spring (616) is located outside the mounting block (610), the top of the bottom rod (612) is inclined, the side of the side rod (615) close to the bottom rod (612) is inclined, the side rod (615) is in contact with the bottom rod (612), and the mounting sleeve (62) is fixedly connected with a conical portion (619) on one side close to the expansion sleeve body (64).

2. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The groove (61) is opened in a circular shape, the fixing bolts (63) are arranged in an array, a plurality of expansion sleeve bodies (64) are arranged in an array, the number of the expansion sleeve bodies (64) is not less than four, and the inclination angle of the bottom of the expansion sleeve body (64) is the same as the inclination angle of the installation sleeve (62).

3. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The connecting block (65) is slidably connected to the slide groove (66); the connecting block (65) is L-shaped; the connecting plate (68) is fixedly connected to the left connecting portion (8) by means of bolts; the number of the connecting plates (68) corresponds to the number of the connecting blocks (65).

4. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The mounting blocks (610) are symmetrically arranged, two mounting blocks (610) are arranged, the spring one (614) is located outside the mounting block (610), and the bottom end of the spring one (614) is fixedly connected to the top of the bottom pressure block (613).

5. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The bottom of the bottom pressure block (613) is arranged in an arc shape, and the bottom of the bottom pressure block (613) fits with the outer side of the conical portion (619); a side of the side rod (615) away from the bottom rod (612) is fixedly connected to a stop block; one end of the second spring (616) is fixedly connected to the mounting block (610), and the other end of the second spring (616) is fixedly connected to the stop block.

6. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The abutment plates (617) are symmetrically arranged on both sides of the connection block (65), and the distance between two adjacent side rods (615) is not less than the width dimension of the expansion sleeve body (64).

7. A hydraulic expansion sleeve with a stable connection according to claim 1, characterized in that: The rotating shaft (3) fits in contact with the interior of the mounting sleeve (62), and the rotating shaft (3) fits in contact with the inner wall of the tapered portion (619).

8. The hydraulic expansion sleeve with stable connection according to claim 1, characterized in that: The hydraulic assembly (7) comprises an annular tube (71) and a one-way valve (73). The annular tube (71) is located inside the groove (61) on one side close to the connecting block (65). The inner ring of the annular tube (71) is tightly abutted against the outer side of the conical portion (619). A connecting tube (72) is connected to one side of the top of the annular tube (71). The connecting tube (72) passes through the left casing (4) and is connected to an oil filling port (74).

9. A hydraulic expansion sleeve with a stable connection according to claim 8, characterized in that: The connecting pipe (72) is connected to the annular pipe (71), and the one-way valve (73) is installed on one side of the upper part of the connecting pipe (72). The one-way valve (73) is located outside the left casing (4).

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