Expansion bolt for mounting air conditioner outdoor unit

Abstract

The embodiment of the application provides an expansion bolt for air conditioner outdoor unit installation, and relates to the technical field of post anchoring of buildings. The expansion bolt for air conditioner outdoor unit installation comprises an expansion screw rod, a nut is threadedly sleeved on the surface of the expansion screw rod, a positioning rod is fixed to the lower end of the expansion screw rod, a pressure hole head is fixed to the lower end of the positioning rod, a linkage plate is slidably inserted into the pressure hole head, a fixed point block is fixed to the side surface of the linkage plate, an adjusting rod is fixed to the upper end of the linkage plate, and a plurality of groups of hinged rods are fixed to the side surface of the adjusting rod in a circular center array mode. The device can simultaneously avoid shaking or loosening caused by too large gap between the bolt and the hole during high-altitude installation operation, thereby significantly shortening the positioning and adjusting time of a single bolt, reducing the rework probability caused by bolt loosening in the later period, and improving the use efficiency and reliability of equipment installation to a certain extent.

Description

Technical Field

[0001] This invention belongs to the field of post-construction anchoring technology, and particularly relates to an expansion bolt for installing an air conditioner outdoor unit. Background Technology

[0002] The safe and stable installation of air conditioner outdoor units is a crucial foundation for ensuring the long-term reliable operation of air conditioning systems. When installing air conditioner outdoor units on building exterior walls, expansion bolts are commonly used as the main load-bearing fasteners. These bolts achieve anchoring through mechanical expansion within drilled holes in the wall using expansion sleeves, bearing the combined effects of the outdoor unit's own weight, operational vibrations, and wind loads.

[0003] In existing technology (publication number CN101526099B, patent application titled "Expansion Bolt"), tightening the nut on the bolt opens several expansion plates, the thickness of which can be arbitrarily increased as needed to improve the strength of the expansion bolt. However, in implementing this technical solution, at least the following problems were found in the existing technology: When using expansion bolts to install air conditioner outdoor units, given that most air conditioner outdoor units are installed at high altitudes, they may sway during long-term operation due to equipment vibration, wind loads, or other external forces. If the swaying problem is not addressed in time, it can easily cause the expansion bolts to loosen, requiring the equipment to be repositioned or reinstalled. This not only increases maintenance costs but also reduces the safety and efficiency of the equipment installation process. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art: traditional expansion bolts do not have a stable limiting installation function, which leads to the expansion bolts being prone to loosening, falling off, or displacement during installation. Therefore, this application proposes an expansion bolt for installing an air conditioner outdoor unit.

[0005] To achieve the above objectives, the specific technical solution of the present invention is as follows: a nut is fixed to the upper end of the expansion screw, a nut is threaded onto the surface of the expansion screw, a positioning rod is fixed to the lower end of the expansion screw, and a pressure head is fixed to the lower end of the positioning rod. A connecting plate is slidably inserted inside the pressure head, and a fixed block is fixed to the side of the connecting plate. An adjusting rod is fixed to the upper end of the connecting plate, and multiple sets of hinge rods are fixed to the side of the adjusting rod in a circular array. A rotating plate is hinged to the middle position of the hinge rod, and a locking block is hinged to the other end of the rotating plate. An expansion sleeve is slidably fitted onto the surface of the expansion screw and the positioning rod, and multiple sets of anti-slip strips are fixed to the upper end of the expansion sleeve in a linear array.

[0006] Preferably, a protective plate is fixed to the lower end of the nut, and the surface of the protective plate is in contact with the surface of one end of the nut. When the equipment is not in use, the friction of the nut can be reduced by the cooperation of the protective plate, thereby improving the service life of the equipment.

[0007] Preferably, a washer is slidably fitted on the surface of the expansion screw, and a washer is fixed at the lower outer position of the washer. The inner surface of the lower end of the washer is in contact with the upper end of the expansion sleeve, and the upper surface of the washer is in contact with the lower surface of the nut. When the washer is moved to the surface of the bracket, the washer is simultaneously in contact with the surface of the bracket, which can increase its friction and at the same time avoid the washer from twisting or deforming due to long-term fixed equipment.

[0008] Preferably, the fixed point blocks are provided in multiple sets, and a limit ring is fixed at the lower position of the multiple sets of fixed point blocks. The upper surface of the limit ring is in contact with the lower surface of the pressing head. The bottom end of the fixed point block is conical. When the multiple sets of fixed point blocks are in contact with the bottom surface of the drill hole, they can automatically center themselves. When the upper end of the fixed point block is in contact with the lower surface of the pressing head, it can avoid the situation where the fixed point block completely enters the interior and causes inconvenience in centering, thereby improving the stability of the equipment to a certain extent.

[0009] Preferably, a positioning block is slidably engaged with the upper end of the fixed point block, and a T-shaped block is fixed at one end of the positioning block. The T-shaped block is slidably inserted into the T-shaped groove opened at the upper end of the fixed point block. The contact positions of the fixed point block and the positioning block are both inclined. When moving upward, the T-shaped block moves inside the T-shaped groove, thereby driving it to be inserted outward into the side of the drill hole.

[0010] Preferably, the inside of the pressure head has multiple sets of reserved slots arranged in a circular array, and the surface of the reserved slots is in contact with the surface of the positioning block. When the positioning block moves, it can be in contact with the surface of the reserved slots, making the positioning block more stable when moving.

[0011] Preferably, the surface of the adjusting rod is slidably inserted into the interior of the positioning rod, and the upper side of the positioning rod is provided with multiple sets of positioning grooves, and the surface of the positioning grooves is in contact with the surface of the locking block. When the surface of the locking block and the surface of the positioning groove are in contact, the movement direction of the locking block can be restricted.

[0012] Preferably, the front end of the locking block is provided with a limiting block, and the width of the limiting block is smaller than the width of the locking block. The connection between the locking block and the limiting block is at an obtuse angle. Through the above operation, the locking block can be more convenient to adjust its position. When one end of the rotating plate moves upward, it can extend outward. According to the design of the obtuse angle at the connection, it can rotate clockwise while extending outward.

[0013] Preferably, a buffer slope is provided at the connection between the pressing head and the positioning rod, and the diameter of the pressing head is larger than the diameter of the expansion sleeve. When the inner wall surface of the lower end of the pressing head is in contact with the buffer slope, the equipment can be simultaneously limited and tightened.

[0014] Preferably, the lower end of the expansion sleeve has multiple sets of sliding grooves, and the position of the sliding grooves corresponds to the locking block. The surface of the sliding groove is in contact with the surface of the limiting block. The upper end of the sliding groove has a limiting groove, and the surface of the limiting groove is in contact with the tail end surface of the locking block. When the expansion sleeve slides on the surface of the positioning rod, the limiting block slides inside the sliding groove. When the surface of the locking block is in contact with the surface of the limiting groove, the positions of the positioning rod and the expansion sleeve can be fixed synchronously.

[0015] The expansion bolt for installing an air conditioner outdoor unit according to the present invention has the following advantages: 1. This type of expansion bolt for installing an air conditioner outdoor unit involves first smoothly inserting the integral component, consisting of an expansion bolt and a positioning rod, into a pre-drilled mounting hole. After the front end of the unit is precisely positioned, the adjusting shim is moved to ensure that the outer surface of the matching washer is completely and tightly fitted against the mounting surface of the air conditioner bracket. Subsequently, the tightening nut is rotated at the threaded end of the expansion bolt. By gradually tightening the nut, the unit's position is reliably fixed, thereby enhancing the overall connection strength and load-bearing capacity of the bracket. This installation method effectively ensures the stability of the air conditioner outdoor unit during installation or long-term use, significantly improving the unit's vibration and displacement resistance, and further enhancing the safety and durability of the installation structure.

[0016] 2. This type of expansion bolt for air conditioner outdoor unit installation, when the expansion bolt drives the positioning rod and the pressing head into the drilled hole, after the bottom of the positioning block is in contact with the bottom of the drilled hole, the T-shaped block can move upward, thereby driving the positioning block to move outward through the pre-reserved groove surface and insert into the drilled hole, thus effectively restricting and fixing the position of the air conditioner outdoor unit mounting bracket. This process can simultaneously avoid shaking or loosening of the equipment during high-altitude installation operations, thus significantly shortening the positioning and adjustment time of a single bolt. In batch installation operations, it can effectively improve the overall installation speed of the equipment, while reducing the probability of rework due to loose bolts later, and to a certain extent improving the efficiency and reliability of equipment installation.

[0017] 3. This type of expansion bolt for installing an air conditioner outdoor unit allows the fixed block to move upward simultaneously, causing the connecting plate to move the adjusting rod upward. This, in turn, causes the hinge rod to move upward, resulting in the rotating plate extending outward and the locking block moving outward. Simultaneously, the locking block enters the limiting groove at the upper end of the slide groove. Through this series of linked operations, the relative positions of the expansion bolt, the positioning rod, and the expansion sleeve are effectively fixed, ensuring the overall structural integrity. This design, by optimizing the mechanical transmission and locking mechanism, significantly improves the stability and reliability of the equipment during installation, reduces the risk of displacement due to vibration or external forces, and improves installation efficiency and safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an expansion bolt structure for installing an air conditioner outdoor unit according to the present invention; Figure 2 This is a schematic diagram of the initial state of the expansion screw of the present invention; Figure 3 This is an exploded view of the nut, bolt, and washer structure of the present invention; Figure 4 This is a cross-sectional view of the initial state of the pressure head structure of the present invention; Figure 5 This is an exploded view of the fixed-point block and positioning block structure of the present invention; Figure 6 This is a schematic diagram of the initial state of the adjusting rod structure of the present invention; Figure 7 This is a schematic diagram of the initial state of the rotating plate and locking block structure of the present invention; Figure 8 This is an exploded view of the rotating plate and locking block structure of the present invention; Figure 9 This is a top view of the expansion sleeve structure of the present invention; Figure 10 This is a front view of the expansion bolt structure for installing an air conditioner outdoor unit according to the present invention.

[0020] The markings in the diagram are as follows: 1. Expansion screw; 2. Nut; 3. Protective plate; 4. Nut; 5. Washer; 6. Gasket; 7. Positioning rod; 8. Pressing head; 9. Connecting plate; 10. Fixed block; 11. Limiting ring; 12. Positioning block; 13. T-block; 14. Reserved groove; 15. Adjusting rod; 16. Hinge rod; 17. Rotating plate; 18. Locking block; 19. Expansion sleeve; 20. Slide groove; 21. Anti-slip strip. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1-3 As shown, an expansion bolt for installing an outdoor unit of an air conditioner according to the present invention includes an expansion bolt 1, a nut 2 fixed to the upper end of the expansion bolt 1, a nut 4 threadedly fitted onto the surface of the expansion bolt 1, a protective plate 3 fixed to the lower end of the nut 2, and the surface of the protective plate 3 fitting against one end surface of the nut 4, a washer 5 slidably fitted onto the surface of the expansion bolt 1, and a washer 6 fixed to the outer position of the lower end of the washer 5, the inner position of the lower end of the washer 5 fitting against the upper end of the expansion sleeve 19, and the upper surface of the washer 5 fitting against the lower surface of the nut 4; When the equipment is not in use, the protective plate 3, together with the nut 4 and the screw cap 2, forms an effective protection mechanism, thereby preventing the contact surface of the screw cap 2 from continuous friction and wear due to long-term contact with the nut 4. The operator can move the washer 5 to a designated position on the surface of the bracket. At this time, the washer 6 will move accordingly and fit tightly against the surface of the bracket. This fit not only significantly enhances the friction between the equipment and the surface of the bracket, but also further improves the overall stability and safety of the equipment installation.

[0023] Furthermore, the use of washer 5 plays a crucial role. When nut 4 is rotated on the surface of expansion screw 1 until its end face contacts one end surface of washer 5, washer 5 effectively disperses the pressure on nut, thus preventing deformation or surface wear of nut 4 during tightening. This protective mechanism not only extends the service life of nut 4 to a certain extent and reduces the frequency of replacement and maintenance, but also achieves integrated installation through the coordination and cooperation of the above operations. This integrated installation method not only simplifies the operation steps but also significantly speeds up the installation process, thereby improving the overall efficiency and work performance of the equipment.

[0024] like Figures 4-6As shown, the lower end of the expansion screw 1 is fixed with a positioning rod 7, and the lower end of the positioning rod 7 is fixed with a pressing head 8. A connecting plate 9 is slidably inserted inside the pressing head 8, and a fixed block 10 is fixed on the side of the connecting plate 9. Multiple sets of fixed blocks 10 are provided. A limit ring 11 is fixed below the multiple sets of fixed blocks 10, and the upper surface of the limit ring 11 is in contact with the lower surface of the pressing head 8. The bottom end of the fixed block 10 is conical. A positioning block 12 is slidably engaged inside the upper end of the fixed block 10, and a T-shaped block 13 is fixed at one end of the positioning block 12. The T-shaped block 13 is slidably inserted into the T-shaped groove opened at the upper end of the fixed block 10. The contact positions of the fixed block 10 and the positioning block 12 are both inclined. Multiple sets of reserved grooves 14 are opened in a circular array inside the pressing head 8, and the surface of the reserved groove 14 is in contact with the surface of the positioning block 12. When the device is placed inside a pre-drilled hole, the lower end of the positioning block 10 at its bottom can precisely and tightly fit the inner surface of the bottom of the hole. As the operator continues to push the device downwards smoothly, the positioning block 10, under the push of the reaction force at the bottom of the hole, can be retracted upwards along the preset track inside the pressing head 8. At this time, with the shape matching between the outer inclined surface of the positioning block 10 and the inner inclined surface of the positioning block 12, the positioning block 12 moves outwards smoothly under the action of the inclined surface thrust, and is then precisely inserted into the side of the hole. Through the above series of linked operations, the installation position of the device can be quickly and firmly fixed, effectively preventing the device from shifting during subsequent installation.

[0025] When the fixed block 10 moves upward to the preset appropriate position, the upper surface of its outer limiting ring 11 will completely fit with the lower surface of the pressing head 8, thereby forming a limit and preventing the fixed block 10 from moving excessively and deviating from the preset track. Through the cooperation of the T-shaped block 13 and the T-shaped groove inside the pressing head 8, not only can the linear stability of the fixed block 10 and the positioning block 12 during the movement be greatly improved, but the positioning block 12 can also be effectively prevented from falling or being displaced unexpectedly during the movement, ensuring the reliability of the entire installation process.

[0026] With the tapered shape of the lower end of the positioning block 10, when the equipment is slowly inserted into the drill hole, its tapered lower end can form a perfect planar fit with the inner surface of the bottom of the drill hole. Utilizing the self-centering characteristic of the tapered structure, the equipment is guided to automatically adjust to the center position of the hole, thereby realizing automatic centering of the equipment, significantly reducing the positioning difficulty for operators and improving installation efficiency.

[0027] like Figures 7-10As shown, an adjusting rod 15 is fixed to the upper end of the connecting plate 9, and multiple sets of hinged rods 16 are fixed to the side of the adjusting rod 15 in a circular array. A rotating plate 17 is hinged to the middle position of the hinged rod 16, and a locking block 18 is hinged to the other end of the rotating plate 17. An expansion sleeve 19 is slidably sleeved on the surface of the expansion screw 1 and the positioning rod 7, and multiple sets of anti-slip strips 21 are fixed to the upper end of the expansion sleeve 19 in a linear array. The adjusting rod 15 is slidably inserted into the interior of the positioning rod 7. Multiple sets of positioning grooves are opened on the upper side of the positioning rod 7, and the surface of the positioning groove is flush with the locking block 18. The surfaces of the locking block 18 and the positioning rod 7 are in contact with each other. The front end of the locking block 18 is provided with a limiting block, and the width of the limiting block is smaller than the width of the locking block 18. The connection between the locking block 18 and the limiting block is at an obtuse angle. The connection between the pressing head 8 and the positioning rod 7 is provided with a buffer slope. The diameter of the pressing head 8 is larger than the diameter of the expansion sleeve 19. The lower end of the expansion sleeve 19 is provided with multiple sets of sliding grooves 20, and the position of the sliding grooves 20 corresponds to the locking block 18. The surface of the sliding groove 20 is in contact with the surface of the limiting block. The upper end of the sliding groove 20 is provided with a limiting groove, and the surface of the limiting groove is in contact with the tail end surface of the locking block 18. When multiple sets of fixed blocks 10 move upward synchronously under the reaction force at the bottom of the drill hole, they drive the connecting plate 9 to slide smoothly along the preset track inside the pressing head 8, thereby causing the adjusting rod 15 fixedly connected to the upper end of the connecting plate 9 to move precisely upward along the axial direction. When the equipment is idle and not installed, the rotating plate 17 is naturally tilted under the combined action of its own gravity and the hinge structure. Its tilt angle is adapted to the reserved space inside the pressing head 8. When the adjusting rod 15 moves upward under the drive of the connecting plate 9, it will simultaneously pull multiple sets of hinge rods 16 arranged in a circular array to lift upward. The other end of the hinge rod 16 pushes one end of the rotating plate 17 to rotate upward synchronously around the hinge point. At this time, the originally tilted rotating plate 17 gradually rotates to a horizontal state, and through the hinge structure at its end, it drives the locking block 18 to extend smoothly outward along the radial direction of the expansion sleeve 19. At this time, the outer surface of the locking block 18 and the inner surface of the preset limiting groove on the inner wall of the expansion sleeve 19 form a tight fit, completing the initial positioning.

[0028] When the adjusting rod 15 moves upward, the expansion screw 1, the positioning rod 7, and the pressing head 8 move downward synchronously under the action of the threaded transmission linkage. At this time, the limiting block slides smoothly along the axial direction on the surface of the slide groove 20 to ensure the consistency of the movement of each component. While the locking block 18 extends outward, the position of the limiting groove corresponds to the position of the locking block 18 synchronously through the preset mechanical linkage. The surface of the locking block 18 and the limiting groove are completely fitted, thereby firmly fixing the axial and radial positions of the expansion sleeve 19 and preventing it from shifting during subsequent installation.

[0029] With the help of the anti-slip strip 21, the static friction between the expansion sleeve 19 and the side of the drill hole can be significantly increased, effectively improving the pull-out resistance of the equipment in the hole. When the pressing head 8 moves upward, it will cause the lower end of the expansion sleeve 19 to come into contact with the buffer slope and generate a squeezing force. This squeezing force is transmitted through the slope to cause the lower end of the expansion sleeve 19 to expand outward, thereby forming a tight engagement with the inner wall of the drill hole, realizing a secondary stable fixation between the equipment and the drill hole.

[0030] By using different width designs for the limiting groove and locking block 18, they can fit into the surface of the sliding groove 20 or the limiting groove at the lower end of the expansion sleeve 19 according to the needs of the actual installation scenario, flexibly adapting to drilling holes of different diameters, further enhancing the versatility and installation flexibility of the equipment.

[0031] The working principle of an expansion bolt for installing an air conditioner outdoor unit is as follows: First, the expansion bolt is placed inside the drilled hole. When the lower ends of multiple sets of fixing blocks 10 are in contact with the lower surface of the drilled hole, they can automatically center themselves according to the shape of the fixing blocks 10. Then, the expansion bolt is tapped, and the fixing blocks 10 are pressed downwards by the force, thereby driving the positioning block 12 to move outwards through the surface of the reserved groove 14. At this time, the positioning block 12 can be inserted into the side of the drilled hole, and the position of the expansion bolt can be fixed. When the fixed block 10 moves upward, it simultaneously drives the connecting plate 9 and the adjusting rod 15 to move upward. At this time, the multiple sets of hinge rods 16 located at the upper end of the adjusting rod 15 move upward simultaneously, driving one end of the rotating plate 17 to move upward. This operation makes the rotating plate 17 horizontal in its overall direction. At the same time, the other end of the rotating plate 17 extends outward. Through the above operation, the locking block 18 extends outward and rotates clockwise. At this time, the rotating plate 17 drives the locking block 18 to move outward inside the positioning groove. When the expansion bolt is struck, the lower surface of the expansion sleeve 19 can fit with the connection position of the positioning rod 7 and the pressing head 8. At the same time, the extrusion force causes the expansion bolt to be limited to the inner wall of the drill hole. At this time, the position of the limiting groove corresponds to the position of the positioning groove, thereby fixing the position of the locking block 18. At this time, the position of the expansion sleeve 19 is fixed. Then, the moving washer 5 drives the surface of the washer 6 to fit with the surface of the bracket. Then, the expansion bolt 1 is rotated and the nut 4 is tightened. At this time, the expansion bolt is firmly bonded to the bracket used by the air conditioner outdoor unit.

[0032] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An expansion bolt for installing an outdoor unit of an air conditioner, comprising an expansion bolt (1), characterized in that: The upper end of the expansion screw (1) is fixed with a nut (2), the surface of the expansion screw (1) is threaded with a nut (4), the lower end of the expansion screw (1) is fixed with a positioning rod (7), and the lower end of the positioning rod (7) is fixed with a pressing head (8). The inside of the pressing head (8) is slidably inserted with a connecting plate (9), and the side of the connecting plate (9) is fixed with a fixed block (10). The upper end of the connecting plate (9) is fixed with an adjusting rod (15), and the side of the adjusting rod (15) is fixed with multiple sets of hinge rods (16) in a circular array. The middle position of the hinge rod (16) is hinged with a rotating plate (17), and the other end of the rotating plate (17) is hinged with a locking block (18). The surfaces of the expansion screw (1) and the positioning rod (7) are slidably fitted with an expansion sleeve (19), and the upper end of the expansion sleeve (19) is fixed with multiple sets of anti-slip strips (21) in a linear array.

2. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The lower end of the nut (2) is fixed with a protective plate (3), and the surface of the protective plate (3) is in contact with one end surface of the nut (4).

3. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The expansion screw (1) is slidably fitted with a gasket (5), and a washer (6) is fixed at the lower outer position of the gasket (5). The inner position of the lower end of the gasket (5) is in contact with the upper end of the expansion sleeve (19), and the upper surface of the gasket (5) is in contact with the lower surface of the nut (4).

4. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The fixed point block (10) is provided in multiple sets, and a limit ring (11) is fixed at the lower position of the multiple sets of fixed point blocks (10). The upper surface of the limit ring (11) is in contact with the lower surface of the pressure head (8), and the bottom end of the fixed point block (10) is conical.

5. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The upper end of the fixed block (10) is slidably engaged with the positioning block (12), and one end of the positioning block (12) is fixed with a T-shaped block (13). The T-shaped block (13) is slidably inserted into the T-shaped groove opened at the upper end of the fixed block (10). The contact positions of the fixed block (10) and the positioning block (12) are both inclined.

6. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The inside of the pressure head (8) has multiple sets of reserved slots (14) arranged in a circular array, and the surface of the reserved slots (14) is in contact with the surface of the positioning block (12).

7. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The surface of the adjusting rod (15) is slidably inserted into the interior of the positioning rod (7). The upper side of the positioning rod (7) has multiple sets of positioning grooves, and the surface of the positioning grooves is in contact with the surface of the locking block (18).

8. The expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The locking block (18) has a limiting block at its front end, and the width of the limiting block is smaller than the width of the locking block (18). The connection between the locking block (18) and the limiting block is at an obtuse angle.

9. An expansion bolt for installing an air conditioner outdoor unit according to claim 8, characterized in that: The connection between the pressing head (8) and the positioning rod (7) is provided with a buffer slope, and the diameter of the pressing head (8) is larger than the diameter of the expansion sleeve (19).

10. An expansion bolt for installing an air conditioner outdoor unit according to claim 1, characterized in that: The lower end of the expansion sleeve (19) is provided with multiple sets of sliding grooves (20), and the position of the sliding grooves (20) corresponds to the locking block (18). The surface of the sliding grooves (20) is in contact with the surface of the limiting block. The upper end of the sliding grooves (20) is provided with a limiting groove, and the surface of the limiting groove is in contact with the tail end surface of the locking block (18).

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