Pre-tightening device of expansion sleeve

Abstract

The utility model relates to the technical field of expansion sleeves, in particular to a pre-tightening device of an expansion sleeve, which comprises an expansion outer sleeve, an expansion component is arranged in the expansion outer sleeve, a central shaft is arranged in the expansion component, the expansion component comprises a mounting ring, an expansion cylinder and an early warning device, the expansion cylinder extends into the expansion outer sleeve, and the central shaft is arranged in the expansion cylinder. The installation ring is fixedly connected to one end of the expansion cylinder, the early warning device is arranged on the installation ring, expansion gaps are formed in one side of the expansion cylinder and one side of the installation ring, the early warning device is arranged on the upper surfaces of the expansion gaps, and a plurality of first through holes are formed in the installation ring; the device has the beneficial effects that the expansion degree of the expansion sleeve can be effectively and flexibly controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion sleeves, in particular to a pre-tightening device for an expansion sleeve. Background Art

[0002] The expansion sleeve is a commonly used mechanical connection component, widely used in various mechanical equipment. The pre-tightening device of the expansion sleeve is to ensure that the expansion sleeve can provide sufficient clamping force during operation to ensure the reliability of the connection.

[0003] In the prior art, most expansion sleeves use a sleeve and screws to provide early warning. Since the sleeve is usually selected in a fixed manner, the degree of early warning is always the same. However, this type of early warning cannot flexibly control the degree of expansion of the expansion sleeve. Therefore, the present invention proposes a pre-tightening device for an expansion sleeve to solve the above problem. Utility Model Content

[0004] The purpose of the present utility model is to provide a pre-tightening device for an expansion sleeve, so as to solve the problem that most of the early warnings proposed in the above background technology cannot flexibly control the degree of expansion of the expansion sleeve.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pre-tightening device for an expansion sleeve, comprising: an expansion sleeve, an expansion assembly is arranged in the expansion sleeve, a center axis is arranged in the expansion assembly, the expansion assembly comprises a mounting ring, an expansion cylinder and an early warning device, the expansion cylinder extends into the expansion sleeve, the mounting ring is fixedly connected to one end of the expansion cylinder, the early warning device is arranged on the mounting ring, an expansion gap is arranged on one side of the expansion cylinder and one side of the mounting ring, the early warning device is arranged on the upper surface of the expansion gap, and a plurality of first through holes are opened on the mounting ring.

[0006] Preferably, the early warning device includes a fixed block, a connecting rod, a fixed wheel and a rotating wheel, the two fixed blocks are fixedly mounted on the mounting ring, the two fixed blocks are arranged on both sides of the expansion gap, the connecting rod passes through the two fixed blocks and is slidingly connected to them, the fixed wheel is fixedly connected to one end of the connecting rod, and the rotating wheel is sleeved on the other end of the connecting rod and is threadedly connected to it.

[0007] Preferably, a plurality of protrusions are provided on both the rotating wheel and the fixed wheel.

[0008] Preferably, the inner walls of the expansion cylinder and the mounting ring are both provided with a second notch, and a second screw is provided on one side of the second notch. The second screw passes through the mounting ring and is slidably connected thereto, and the bottom of the second screw extends into the expansion sleeve and is threadedly connected thereto.

[0009] Preferably, a second slit is provided on one side of the expansion sleeve, a third notch is provided on the inner wall of the expansion sleeve, a plurality of first threaded holes are provided on the upper surface of the expansion sleeve, a plurality of sliding grooves are provided on the lower surface of the expansion sleeve, and the sliding grooves are connected to the first threaded holes.

[0010] Preferably, the expansion sleeve and the expansion component are connected by a first screw, the first screw passes through the first through hole and is slidably connected thereto, the bottom of the first screw extends into the first threaded hole and is threadedly connected thereto, and a pre-tightening block is fixedly installed on the bottom of the first screw, and the pre-tightening block is slidably connected in the slide groove.

[0011] Preferably, a first notch is opened on one side of the central axis, and a clamping block is installed in the first notch.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model is provided with an early warning device, which can control the tightness of the mounting ring by rotating the rotating wheel, thereby flexibly controlling the expansion degree of the expansion cylinder. The device effectively makes it possible to flexibly control the expansion degree of the expansion sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the expansion assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the new expansion jacket of the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the pre-tightening device of the utility model;

[0018] Figure 5 This is a schematic diagram of the disassembled structure of the first screw and the expansion sleeve of the utility model.

[0019] In the figure: 1. Expansion sleeve; 2. Expansion assembly; 3. First screw; 4. Center axis; 5. First notch; 6. Mounting ring; 7. Expansion cylinder; 8. Expansion gap; 9. Second notch; 10. Second screw; 11. Pre-tightening device; 12. First through hole; 13. First threaded hole; 14. Third notch; 15. Second gap; 16. Fixed block; 17. Connecting rod; 18. Fixed wheel; 19. Rotating wheel; 20. Raised block; 21. Slide groove; 23. Pre-tightening block; 24. Block. DETAILED DESCRIPTION

[0020] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "one," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] For the purpose of simplicity and illustration, the principles of the embodiments are described primarily with reference to examples. In the following description, many specific details are provided to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures are not described in detail to avoid unnecessarily obscuring the understanding of these embodiments. In addition, all embodiments may be used in combination with each other.

[0024] Example 1

[0025] See also Figure 1 、 Figure 2 and Figure 4The utility model provides a technical solution: a pre-tightening device 11 of a tightening sleeve, comprising: an expansion sleeve 1, an expansion assembly 2 is provided in the expansion sleeve 1 for controlling the expansion degree of the mounting ring 6, a central shaft 4 is provided in the expansion assembly 2, the central shaft 4 passes through the expansion cylinder 7 and is clamped therewith, the expansion assembly 2 comprises a mounting ring 6, an expansion cylinder 7 and a warning device, the expansion cylinder 7 extends into the expansion sleeve 1, the expansion cylinder 7 and the expansion sleeve 1 are tightly fitted together, the mounting ring 6 is fixedly connected to one end of the expansion cylinder 7, the warning device is provided on the mounting ring 6, the warning device is used to control the tightness of the mounting ring 6 for easy installation and use, an expansion gap 8 is provided on one side of the expansion cylinder 7 and one side of the mounting ring 6, the expansion gap 8 is the key to whether the expansion cylinder 7 can expand, the warning device is provided on the upper surface of the expansion gap 8, and can be activated by turning the screw of the warning device, and a plurality of first through holes 12 are opened on the mounting ring 6, which are convenient for use when fixing and controlling.

[0026] The early warning device includes a fixed block 16, a connecting rod 17, a fixed wheel 18 and a rotating wheel 19. The two fixed blocks 16 are fixedly mounted on the mounting ring 6. The two fixed blocks 16 are exactly the same. The two fixed blocks 16 are arranged on both sides of the expansion gap 8. The connecting rod 17 spans the upper surface of the expansion gap 8. The connecting rod 17 passes through the two fixed blocks 16 and is slidably connected thereto. One end of the connecting rod 17 is provided with a thread. The fixed wheel 18 is fixedly connected to one end of the connecting rod 17. The inner side of the rotating wheel 19 is provided with a thread. The rotating wheel 19 is sleeved on the other end of the connecting rod 17 and is threadedly connected thereto. A plurality of protrusions 20 are provided on the rotating wheel 19 and the fixed wheel 18. The protrusions 20 are intended to increase the friction during rotation so that the rotating wheel 19 is not easy to slip when rotating.

[0027] In actual use, the fixed wheel 18 can be controlled by one hand to prevent it from rotating, and the rotating wheel 19 can be rotated with the other hand to adjust the size of the expansion gap 8. The size of the expansion gap 8 can reflect the degree of expansion of the expansion cylinder 7. When the rotating wheel 19 is close to the fixed wheel 18, the two fixed blocks 16 are close to each other and drive the expansion gap 8 to become smaller. When the rotating wheel 19 is away from the fixed wheel 18, the two fixed blocks 16 are away from each other, and the expansion gap 8 becomes larger.

[0028] Example 2

[0029] See also Figure 1-Figure 5On the basis of embodiment 1, the inner walls of the expansion cylinder 7 and the mounting ring 6 are both provided with a second notch 9. The second notch 9 is for placing the block 24. A second screw 10 is provided on one side of the second notch 9. The top of the second screw 10 is provided with a hexagonal slot. When the second screw 10 is tightened, it can just press the block 24 placed in the second notch 9 so that it cannot move. In this way, the central shaft 4 can be clamped and driven to rotate. The second screw 10 passes through the mounting ring 6 and is slidably connected thereto. The bottom of the second screw 10 extends into the expansion sleeve 1 and is threadedly connected thereto. The top wall of the second screw 10 must be aligned with the mounting ring 6. Tightly fitting, a second gap 15 is provided on one side of the expansion sleeve 1. When installed, the second gap 15 and the expansion gap 8 can be on the same plane. A third notch 14 is provided on the inner wall of the expansion sleeve 1. The third notch 14 is also for placing the block 24. A plurality of first threaded holes 13 are provided on the upper surface of the expansion sleeve 1. Threads are provided in the first threaded holes 13. A plurality of slide grooves 21 are provided on the lower surface of the expansion sleeve. Several slide grooves 21 and several threaded holes are matched one by one. The slide grooves 21 are connected to the first threaded holes 13. The bottom of each first screw 3 can pass through the first threaded hole 13 and extend into the slide groove 21.

[0030] The expansion sleeve 1 and the expansion component 2 are connected by a first screw 3. The first screw 3 passes through the first through hole 12 and is slidably connected thereto. Several first screws 3 are arranged on both sides of the second notch 9 and the expansion gap 8. The bottom of the first screw 3 extends into the first threaded hole 13 and is threadedly connected thereto. A pre-tightening block 23 is fixedly installed on the bottom of the first screw 3. The pre-tightening block 23 is used to prevent the expansion cylinder 7 from detaching from the expansion sleeve 1 during use. The presence of the pre-tightening block 23 makes it difficult for the two to detach. The pre-tightening block 23 is slidably connected to the slide groove 21.

[0031] The expansion cylinder 7 of this device is configured to have a thickness that gradually decreases from top to bottom, and similarly, the thickness of the expansion sleeve 1 gradually increases from top to bottom. In this way, the tighter the two are fitted together, the more the first screw 3 is inserted, and the greater the degree of expansion. During use, if the two are about to separate from each other, the pre-tightening block 23 will be stuck in the slide groove 21, so that the two are relaxed but not separated, which plays a certain early warning role.

[0032] Example 3

[0033] See also Figure 1On the basis of the second embodiment, a first notch 5 is opened on one side of the central shaft 4, and a clamping block 24 is installed in the first notch 5. The placement of the clamping block 24 is achieved by the joint action of the first notch 5, the second notch 9 and the third notch 14, and the clamping block 24 is fixed in this position by a second screw 10. When the central shaft 4 rotates, the expansion sleeve will be driven to rotate through the clamping block 24.

[0034] When the rotating wheel 19 is moved away from the fixed wheel 18, the two fixing blocks 16 move away from each other. At this time, the expansion gap 8 becomes larger, and the more the first screw 3 is extended, the greater the degree of expansion. During use, if the two are about to separate from each other, the pre-tightening block 23 will be stuck in the slide groove 21, so that the two are relaxed but not separated, which plays a certain warning role. The placement of the card block 24 is achieved by the joint action of the first notch 5, the second notch 9 and the third notch 14, and the card block 24 is fixed in this position by the second screw 10. When the center shaft 4 rotates, the expansion sleeve will be driven to rotate through the card block 24.

[0035] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-tightening device for an expansion sleeve, comprising: An expansion sleeve (1) is characterized in that: an expansion assembly (2) is provided in the expansion sleeve (1), a central axis (4) is provided in the expansion assembly (2), the expansion assembly (2) includes a mounting ring (6), an expansion cylinder (7) and an early warning device, the expansion cylinder (7) extends into the expansion sleeve (1), the mounting ring (6) is fixedly connected to one end of the expansion cylinder (7), the early warning device is provided on the mounting ring (6), an expansion gap (8) is provided on one side of the expansion cylinder (7) and one side of the mounting ring (6), the early warning device is provided on the upper surface of the expansion gap (8), and a plurality of first through holes (12) are provided on the mounting ring (6).

2. The pre-tightening device of the expansion sleeve according to claim 1, characterized in that: The pre-tightening device (11) comprises a fixed block (16), a connecting rod (17), a fixed wheel (18) and a rotating wheel (19), wherein the two fixed blocks (16) are fixedly mounted on the mounting ring (6), the two fixed blocks (16) are arranged on both sides of the expansion gap (8), the connecting rod (17) passes through the two fixed blocks (16) and is slidably connected thereto, the fixed wheel (18) is fixedly connected to one end of the connecting rod (17), and the rotating wheel (19) is sleeved on the other end of the connecting rod (17) and is threadedly connected thereto.

3. The pre-tightening device of the expansion sleeve according to claim 2, characterized in that: A plurality of protrusions (20) are provided on both the rotating wheel (19) and the fixed wheel (18).

4. The pre-tightening device of a expansion sleeve according to claim 1, characterized in that: The inner walls of the expansion cylinder (7) and the mounting ring (6) are both provided with a second notch (9), and a second screw (10) is provided on one side of the second notch (9). The second screw (10) passes through the mounting ring (6) and is slidably connected thereto, and the bottom of the second screw (10) extends into the expansion sleeve (1) and is threadedly connected thereto.

5. The pre-tightening device of the expansion sleeve according to claim 4, characterized in that: A second slit (15) is provided on one side of the expansion sleeve (1), a third notch (14) is provided on the inner wall of the expansion sleeve (1), a plurality of first threaded holes (13) are provided on the upper surface of the expansion sleeve, a plurality of slide grooves (21) are provided on the lower surface of the expansion sleeve, and the slide grooves (21) are connected to the first threaded holes (13).

6. The pre-tightening device of the expansion sleeve according to claim 5, characterized in that: The expansion sleeve (1) and the expansion component (2) are connected by a first screw (3), the first screw (3) passes through the first through hole (12) and is slidably connected thereto, the bottom of the first screw (3) extends into the first threaded hole (13) and is threadedly connected thereto, and a pre-tightening block (23) is fixedly installed at the bottom of the first screw (3), and the pre-tightening block (23) is slidably connected in the slide groove (21).

7. The pre-tightening device of the expansion sleeve according to claim 6, characterized in that: A first notch (5) is provided on one side of the central axis (4), and a clamping block (24) is installed in the first notch (5).

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