Collapsible expansion anchor

Abstract

This utility model provides a detachable expandable fixing device, including: a T-shaped sleeve, an expansion mechanism, an operating mechanism, steel balls, and a guide groove. The expansion mechanism is axially slidable inside the T-shaped sleeve and allows circumferential rotation relative to the T-shaped sleeve. One end of the expansion mechanism extending out of the T-shaped sleeve is an expansion section, and the other end is connected to the operating mechanism. Multiple expansion plates are provided at the end of the T-shaped sleeve near the expansion section. The expansion section allows the operating mechanism to move towards the expansion plates of the T-shaped sleeve and compress the expansion plates to expand and deform. A chamber is provided at the other end of the T-shaped sleeve, and a guide groove is provided on the inner wall of the chamber. A steel ball is provided on the outer wall of the portion of the operating mechanism located in the chamber. The steel ball slides along the guide groove. The expansion mechanism and the operating mechanism are restricted from moving relative to the T-shaped sleeve by the steel ball moving to the locking position of the guide groove. This application requires no tools; installation and disassembly can be performed directly by simply rotating the operating mechanism.

Description

Technical Field

[0001] This utility model relates to the field of machined parts, and more specifically, to a detachable expandable fixing device. Background Technology

[0002] During the machining process, when it is necessary to temporarily fix the parts to brackets or packaging boxes for transportation, equipment, and testing, bolts and nuts are usually used for fixing. Both fixing and removing bolts and nuts require manual operation with tools, and for important parts, fixing bolts and nuts may also damage the mounting surface. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a detachable expansion-type fixing device.

[0004] According to the present invention, a detachable expansion-type fixing device includes: a T-shaped sleeve, an expansion mechanism, an operating mechanism, steel balls, and a guide groove.

[0005] The expansion mechanism is slidably installed in the T-shaped sleeve along the axial direction and is allowed to rotate circumferentially relative to the T-shaped sleeve. One end of the expansion mechanism extending out of the T-shaped sleeve is an expansion section, and the other end is connected to the operating mechanism. The end of the T-shaped sleeve near the expansion section is provided with multiple expansion plates. The expansion section allows the expansion plate to be moved toward the expansion plate end of the T-shaped sleeve by pulling the operating mechanism and squeezed to expand and deform the expansion plate.

[0006] The other end of the T-shaped sleeve is provided with a chamber, the inner wall of which is provided with a guide groove. The outer wall of the part of the operating mechanism located in the middle of the chamber is provided with a steel ball, which slides along the guide groove. The expansion mechanism and the operating mechanism are restricted from moving relative to the T-shaped sleeve by the steel ball moving to the locking position of the guide groove.

[0007] Preferably, the T-shaped sleeve has a T-shaped structure with multiple expansion plates at one end, a sleeve in the middle, and a chamber at the other end;

[0008] The outer wall of the chamber is threaded.

[0009] Preferably, the expansion mechanism is a rod-shaped structure with an inverted conical expansion section at one end, a connecting rod in the middle, and a screw at the other end;

[0010] The connecting rod section of the expansion mechanism slides along the sleeve section of the T-shaped sleeve, and the screw section of the expansion mechanism is located in the cavity of the T-shaped sleeve and is threadedly connected to the operating mechanism.

[0011] Preferably, one end of the operating mechanism is a frustum section and the other end is a cylindrical section. The frustum section of the operating mechanism is connected to the expansion mechanism and slides along the inner wall of the chamber of the T-shaped sleeve.

[0012] Preferably, a limiting device is threaded onto one end of the chamber of the T-shaped sleeve, and a limiting baffle is provided on the side of the limiting device away from the expansion section of the expansion mechanism. The limiting baffle has a through hole in the middle that allows the cylindrical section of the operating mechanism to pass through, and the diameter of the through hole is smaller than the diameter of the frustum section of the operating mechanism.

[0013] Preferably, the frustum section of the operating mechanism is provided with a spring groove for accommodating a spring on one side facing the T-shaped sleeve expansion plate, with one end of the spring located in the spring groove and the other end abutting against the inner wall of the bottom surface of the chamber.

[0014] Preferably, the guide groove includes: a first transverse groove, a first longitudinal groove, a second transverse groove, and a second longitudinal groove;

[0015] One end of the first transverse groove is connected to one end of the first longitudinal groove, the other end of the first longitudinal groove is connected to one end of the second transverse groove, the other end of the second transverse groove is connected to one end of the second longitudinal groove, and the other end of the second longitudinal groove extends toward the chamber in a direction away from the expansion plate.

[0016] Preferably, the first longitudinal groove and the second longitudinal groove are parallel to the axial direction of the T-shaped sleeve, and the first transverse groove and the second transverse groove are inclined at an angle to the direction perpendicular to the axial direction of the T-shaped sleeve.

[0017] Preferably, the first locking position is when the steel ball is located at one end of the first transverse groove away from the first longitudinal groove, and the multiple expansion plates are in a gathered state.

[0018] When the steel ball is located at one end of the second transverse groove connecting to the second longitudinal groove and is partially in the second longitudinal groove, it is in the second locking position, and the multiple expansion plates are in an expanded state.

[0019] Preferably, the T-shaped sleeve is made of resin, and the multiple expansion plates are separated from each other. When the expansion plates are in an expanded state, they undergo elastic deformation.

[0020] The expansion mechanism is made of metal.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This application uses a resin T-shaped sleeve to contact the fixed parts. For important parts, it will not cause surface damage and can play a certain role in buffering and shock absorption.

[0023] 2. This application requires no tools; installation and disassembly can be performed directly by simply rotating the operating mechanism.

[0024] 3. This application has a locking mechanism that prevents it from being released due to accidental contact. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a half-sectional view of the expansion-type fixing device;

[0027] Figure 2 Schematic diagram of the transition from the released state to the fixed state;

[0028] Figure 3 This is a schematic diagram illustrating the positional change of the steel ball as it transitions from a released state to a stationary state.

[0029] Figure 4 This is a schematic diagram illustrating the principle of transitioning from a fixed state to a released state.

[0030] Figure 5 This is a schematic diagram showing the position change of the steel ball as it transitions from a fixed state to a released state.

[0031] Figure 6 This is a schematic diagram showing the position change of the steel ball when it enters the second locking position.

[0032] As shown in the figure:

[0033] Detailed Implementation

[0034] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0035] This embodiment utilizes an integrated T-shaped sleeve 1 made of resin material, an expansion plate, and an expansion mechanism 2 made of metal material, so that the metal part serves as a fixing device during product transfer, assembly, and testing without contacting the product. A spring 4 is present in the T-shaped sleeve 1 to achieve automatic clamping and fixing; it can be released by pressing without tools, enabling quick assembly and disassembly. Furthermore, in both the released and fixed states, the operating mechanism 3 can be rotated to enter the locking position of the guide groove 7 to lock the current state.

[0036] like Figure 1 As shown, this embodiment includes: a T-shaped sleeve 1, an expansion mechanism 2, an operating mechanism 3, a spring 4, a limiting device 5, a steel ball 6, and a guide groove 7.

[0037] The expansion mechanism 2 is axially slidably installed inside the T-shaped sleeve 1 and allows circumferential rotation relative to the T-shaped sleeve 1. The T-shaped sleeve 1 has multiple expansion plates at one end, a sleeve in the middle, and a chamber at the other end, with threads on the outer wall of the chamber. The expansion mechanism 2 has an inverted conical expansion section at one end, a connecting rod in the middle, and a screw at the other end; the connecting rod section of the expansion mechanism 2 slides along the sleeve section of the T-shaped sleeve 1, and the screw section of the expansion mechanism 2 is located in the chamber of the T-shaped sleeve 1 and threadedly connected to the operating mechanism 3. A limiting device 5 is threadedly installed at one end of the chamber of the T-shaped sleeve 1. A guide groove 7 is provided on the inner wall of the chamber, and a steel ball 6 is provided on the outer wall of the middle part of the operating mechanism 3. The steel ball 6 slides along the guide groove 7, and the expansion mechanism 2 and the operating mechanism 3 are restricted from moving relative to the T-shaped sleeve 1 by the steel ball 6 moving to the locking position of the guide groove 7. One end of the T-shaped sleeve 1 extending from the expansion mechanism 2 is an expansion section, and the other end is connected to the operating mechanism 3. The end of the T-shaped sleeve 1 near the expansion section is provided with multiple expansion plates. The expansion section allows the expansion plate to be moved toward the expansion plate end of the T-shaped sleeve 1 by pulling the operating mechanism 3 and squeezed to expand and deform the expansion plate.

[0038] One end of the operating mechanism 3 is a frustum section, and the other end is a cylindrical section. The frustum section of the operating mechanism 3 is connected to the expansion mechanism 2 and slides along the inner wall of the chamber of the T-shaped sleeve 1. A spring groove for accommodating the spring 4 is provided on the side of the frustum section of the operating mechanism 3 facing the expansion plate end of the T-shaped sleeve 1. One end of the spring 4 is located in the spring groove, and the other end abuts against the inner wall of the bottom surface of the chamber. A limiting baffle is provided on the side of the limiting device 5 away from the expansion section of the expansion mechanism 2. A through hole is provided in the middle of the limiting baffle, allowing the cylindrical section of the operating mechanism 3 to pass through. The diameter of the through hole is smaller than the diameter of the frustum section of the operating mechanism 3.

[0039] The guide groove 7 includes: a first transverse groove 71, a first longitudinal groove 72, a second transverse groove 73, and a second longitudinal groove 74. One end of the first transverse groove 71 is connected to one end of the first longitudinal groove 72, the other end of the first longitudinal groove 72 is connected to one end of the second transverse groove 73, the other end of the second transverse groove 73 is connected to one end of the second longitudinal groove 74, and the other end of the second longitudinal groove 74 extends towards the chamber away from the expansion piece. The first longitudinal groove 72 and the second longitudinal groove 74 are parallel to the axial direction of the T-shaped sleeve 1, and the first transverse groove 71 and the second transverse groove 73 are inclined at an angle to the direction perpendicular to the axial direction of the T-shaped sleeve 1. When the steel ball 6 is located at the end of the first transverse groove 71 away from the first longitudinal groove 72, it is in the first locking position, and the multiple expansion pieces are in a gathered state; when the steel ball 6 is located at the end of the second transverse groove 73 connected to the second longitudinal groove 74 and is partially in the second longitudinal groove 74, it is in the second locking position, and the multiple expansion pieces are in an expanded state.

[0040] When designing the thickness of the frustum section of the operating mechanism 3 and the position of the steel ball 6, it is necessary to satisfy the following: when the frustum section abuts against the limiting baffle of the limiting device 5 under the action of the spring 4, the steel ball 6 just partially falls into the second longitudinal groove 74, so that when the operating mechanism 3 only performs the pressing or rotating action, it cannot fall into the second longitudinal groove 74, thereby ensuring that the operating mechanism 3 will not change its working state due to accidental contact.

[0041] In one embodiment, the T-shaped sleeve 1 is made of resin, and the multiple expansion plates are separated from each other. When the expansion plates are in an expanded state, they undergo elastic deformation; the expansion mechanism 2 is made of metal.

[0042] Working principle:

[0043] 1. From the released state to the fixed state:

[0044] like Figure 2-3 As shown, due to the restriction of the first transverse groove 71, the steel ball 6 is in the first locking position. At this time, the spring 4 is compressed, the expansion section of the expansion mechanism 2 does not squeeze the expansion plate, and the multiple expansion plates are in a gathered state. At this time, the fixing device can be installed into the through hole of the component and the fixing bracket. Then, the operating mechanism 3 is rotated to move the steel ball 6 to the first longitudinal groove 72. The expansion mechanism 2 is pushed upward under the action of the spring 4, and the expansion mechanism 2 pushes the expansion plate to expand, fixing the component and the fixing bracket. Then, the operating mechanism 3 is rotated again so that the steel ball 6 passes through the second transverse groove 73 and falls into the second longitudinal groove 74 under the action of the spring 4 and the limiting device 5, entering the second locking position, and the fixing device is fixed.

[0045] 2. Transition from working state to releasing state:

[0046] like Figure 4-5 As shown, due to the pressure of the spring 4 and the limiting device 5, the steel ball 6 is in the second locked position, at which point the expansion plate is in an expanded state. Rotating the operating mechanism 3 and pressing it down causes the steel ball 6 to move along the second transverse groove 73 and the first longitudinal groove 72 to the first transverse groove 71, and the expansion plate returns to its converged state. Then, continuing to rotate the operating mechanism 3 causes the steel ball 6 to reach the other end of the first transverse groove 71 and enter the first locked position. The fixing device is then removed, releasing the components from their fixation.

[0047] 3. Guiding mechanism

[0048] like Figure 6As shown, this embodiment uses a first transverse groove 71 and a second transverse groove 73 with a certain angle, so that the rotating operating mechanism 3 can slide upward due to the pressure of the spring 4 in both working states, thus automatically entering the locking position. When entering the fixed state, the steel ball 6 will partially enter the second longitudinal groove 74. When releasing, the operating mechanism 3 needs to be rotated while pressing down, thus ensuring that the operating mechanism 3 will not change its working state due to accidental contact.

[0049] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A detachable inflatable fixing device, characterized in that, include: T-shaped sleeve (1), expansion mechanism (2), operating mechanism (3), steel ball (6) and guide groove (7); The expansion mechanism (2) is axially slidably installed inside the T-shaped sleeve (1) and is allowed to rotate circumferentially relative to the T-shaped sleeve (1). One end of the expansion mechanism (2) extending out of the T-shaped sleeve (1) is an expansion section, and the other end is connected to the operating mechanism (3). The end of the T-shaped sleeve (1) near the expansion section is provided with multiple expansion plates. The expansion section allows the expansion plate to move toward the expansion plate end of the T-shaped sleeve (1) and be squeezed to expand and deform by pulling the operating mechanism (3). The other end of the T-shaped sleeve (1) is provided with a chamber, and the inner wall of the chamber is provided with a guide groove (7). The outer wall of the operating mechanism (3) located in the middle part of the chamber is provided with a steel ball (6). The steel ball (6) slides along the guide groove (7). The expansion mechanism (2) and the operating mechanism (3) are restricted from moving relative to the T-shaped sleeve (1) by moving the steel ball (6) to the locking position of the guide groove (7).

2. The removable expansion anchor of Claim 1, wherein: The T-shaped sleeve (1) is a T-shaped structure with multiple expansion plates at one end, a sleeve in the middle, and a chamber at the other end. The outer wall of the chamber is threaded.

3. The removable inflatable restraint of claim 2, wherein: The expansion mechanism (2) is a rod-shaped structure with an inverted conical expansion section at one end, a connecting rod in the middle, and a screw at the other end. The connecting rod section of the expansion mechanism (2) slides along the sleeve section of the T-shaped sleeve (1), and the screw section of the expansion mechanism (2) is located in the cavity of the T-shaped sleeve (1) and is threadedly connected to the operating mechanism (3).

4. The removable expansion anchor of Claim 1, wherein: The operating mechanism (3) has a frustum section at one end and a cylindrical section at the other end. The frustum section of the operating mechanism (3) is connected to the expansion mechanism (2) and slides along the inner wall of the chamber of the T-shaped sleeve (1).

5. The removable expansion anchor of Claim 4, wherein: A limiting device (5) is threaded onto one end of the chamber of the T-shaped sleeve (1). A limiting baffle is provided on the side of the limiting device (5) away from the expansion section of the expansion mechanism (2). A through hole is provided in the middle of the limiting baffle to allow the cylindrical section of the operating mechanism (3) to pass through. The diameter of the through hole is smaller than the diameter of the frustum section of the operating mechanism (3).

6. The removable expansion anchor of Claim 4, wherein: The frustum section of the operating mechanism (3) is provided with a spring groove for accommodating the spring (4) on one side facing the expansion plate of the T-shaped sleeve (1). One end of the spring (4) is located in the spring groove, and the other end abuts against the inner wall of the bottom surface of the chamber.

7. The removable expansion anchor of Claim 1, wherein: The guide groove (7) includes: a first transverse groove (71), a first longitudinal groove (72), a second transverse groove (73), and a second longitudinal groove (74); One end of the first transverse groove (71) is connected to one end of the first longitudinal groove (72), the other end of the first longitudinal groove (72) is connected to one end of the second transverse groove (73), the other end of the second transverse groove (73) is connected to one end of the second longitudinal groove (74), and the other end of the second longitudinal groove (74) extends toward the chamber in the direction away from the expansion plate.

8. The removable expansion anchor of Claim 7, wherein: The first longitudinal groove (72) and the second longitudinal groove (74) are parallel to the axial direction of the T-shaped sleeve (1), and the first transverse groove (71) and the second transverse groove (73) are inclined at an angle to the direction perpendicular to the axial direction of the T-shaped sleeve (1).

9. The removable expansion anchor of Claim 7, wherein: When the steel ball (6) is located at one end of the first transverse groove (71) away from the first longitudinal groove (72), it is in the first locking position, and the multiple expansion plates are in a gathered state; When the steel ball (6) is located at one end of the second transverse groove (73) connected to the second longitudinal groove (74) and partially in the second longitudinal groove (74), it is in the second locking position, and the multiple expansion plates are in an expanded state.

10. The removable expansion anchor of Claim 9, wherein: The T-shaped sleeve (1) is made of resin material, and the multiple expansion plates are separated from each other. When the expansion plates are in an expanded state, they undergo elastic deformation. The expansion mechanism (2) is made of metal.

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