A bolt dismounting device based on negative pressure adsorption

Abstract

The application provides a bolt dismounting device based on negative pressure adsorption, which comprises a rotary driving source, a sleeve in transmission connection with the rotary driving source, and an ejection component installed in the sleeve. An engaging inner hole is arranged at the end of the sleeve, which is used for engaging with the outer circumferential surface of the nut of the bolt to be dismounted. The end of the ejection component is telescopically arranged in the engaging inner hole. An air suction through hole and an air suction channel are arranged in the sleeve. The outer end of the air suction through hole is in communication with the outside. The inner end of the air suction through hole is in communication with the engaging inner hole through the air suction channel. The air suction through hole is eccentric to the sleeve along the rotation direction of the sleeve when the bolt to be dismounted is loosened. The sleeve adsorbs the bolt to be dismounted during the rotation of the sleeve driven by the rotary driving source. The bolt to be dismounted is automatically dismounted simply and reliably, the external hook is not additionally arranged, the time for occupying the beat is reduced, and the loosening, jamming and other failure faults of the external hook are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of precast pile production technology, and in particular to a bolt disassembly device based on negative pressure adsorption. Background Technology

[0002] In the field of industrial automation, during the manufacturing process of prestressed concrete pipe piles, head plate and tail plate assemblies are respectively installed at both ends of the reinforcing cage. The head plate and tail plate assembly consists of a head plate and an end plate fixed together by several hexagonal bolts, and the tail plate and tail plate assembly consists of a tail plate and an end plate fixed together by several hexagonal bolts. The head plate and tail plate are used to assist in the production of the pipe pile. After the prestressed concrete pipe pile is formed, the head plate and tail plate installed at both ends need to be disassembled automatically. During the automated disassembly of the head plate and tail plate, the hexagonal bolts fixing the head plate and end plate, as well as the tail plate and end plate, must first be removed; then, for automated conveying requirements, these hexagonal bolts are dropped to the designated position.

[0003] In the prior art, the structure of the bolt removal equipment used for removing external hexagonal bolts during the production of prestressed concrete pipe piles is as follows: Figure 1 and Figure 2 As shown, the existing bolt removal equipment mainly includes an air wrench 100, a sleeve 200 installed at the output end of the air wrench 100, and a movable external claw 300. The specific disassembly process is as follows: The sleeve 200 is fitted over the nut of the external hexagonal bolt 400; the pneumatic wrench 100 drives the sleeve 200 to rotate, causing the sleeve 200 to rotate along with the external hexagonal bolt 400, thereby loosening the external hexagonal bolt 400 until the threaded portion of the external hexagonal bolt 400 is completely disengaged from the fastened component (head plate or tail plate); the external claw 300 hooks onto the nut of the external hexagonal bolt 400; the bolt disassembly device retracts as a whole, thereby pulling the external hexagonal bolt 400 out of the through hole of the fastened component (head plate or tail plate); the external claw 300 resets, thereby loosening the external hexagonal bolt 400; the sleeve 200 is equipped with an ejector component, which ejects the external hexagonal bolt 400 from the sleeve 200, causing it to fall into a designated position, thus completing the automatic bolt disassembly.

[0004] However, in existing bolt removal equipment, the hooking and loosening actions of the external claws need to be controlled separately, which takes up cycle time and is not conducive to improving the bolt removal efficiency. Furthermore, it is affected by the vibration of the pneumatic wrench, which can easily cause loosening, jamming and other failures, increasing the number of equipment maintenance points. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a bolt disassembly device based on negative pressure adsorption, which can automatically disassemble the bolts to be disassembled simply and reliably without adding additional hooks or bolt loosening actions.

[0006] To achieve the above objectives, the present invention provides a bolt removal device based on negative pressure adsorption, comprising a rotary drive source and a sleeve connected to the rotary drive source. The sleeve has an engagement inner hole at its end, which engages with the outer circumferential surface of the nut of the bolt to be removed. The bolt removal device based on negative pressure adsorption further includes an ejector component installed in the sleeve, the end of which is retractably placed in the engagement inner hole. The sleeve has a suction through hole and a suction channel. The outer end of the suction through hole communicates with the outside, and the inner end of the suction through hole communicates with the engagement inner hole through the suction channel. The suction through hole is eccentric to the sleeve along the rotation direction of the sleeve when the bolt to be removed is loosened.

[0007] The preferred embodiment of the above technical solution is as follows: the ejector component is a spring extending axially along the bolt to be removed, one end of the spring is fixed in the sleeve, and the other end of the spring is placed in the engagement inner hole;

[0008] When the nut of the bolt to be removed is accommodated in the engagement bore, the spring is in a compressed state and abuts against the nut of the bolt to be removed.

[0009] The preferred embodiment of the above technical solution is as follows: several fixing screws are screwed into the sleeve, and the inner end of the fixing screws abuts against the outer periphery of the spring.

[0010] The preferred embodiment of the above technical solution is as follows: the sleeve has an inner mounting hole, the spring is retractably accommodated in the inner mounting hole, one end of the inner mounting hole extends to the engagement inner hole; the inner mounting hole constitutes the suction channel, and the inner end of the suction through hole extends to the inner mounting hole.

[0011] The preferred embodiment of the above technical solution is: there are several suction holes, and the several suction holes are evenly arranged along the circumference of the sleeve.

[0012] The preferred embodiment of the above technical solution is: the rotary drive source is a pneumatic gun, and the output end of the pneumatic gun is detachably connected to the sleeve.

[0013] The preferred embodiment of the above technical solution is as follows: the bolt disassembly device based on negative pressure adsorption further includes a connecting pin and pins that can be plugged into and detachably assembled at both ends of the connecting pin. The output end of the air gun is provided with a connecting shaft section. The connecting shaft section is inserted into the sleeve. The connecting pin is inserted into the connecting shaft section and the sleeve. The two pins abut against the outer periphery of the sleeve respectively.

[0014] The preferred embodiment of the above technical solution is: the connecting shaft segment is a square shaft segment, and the sleeve is provided with a square connecting hole that is adapted to the connecting shaft segment.

[0015] The preferred embodiment of the above technical solution is as follows: the bolt disassembly device based on negative pressure adsorption further includes an elastic rubber ring, which is fixed on the bottom surface of the meshing inner hole.

[0016] As described above, the bolt disassembly device based on negative pressure adsorption of the present invention has the following beneficial effects:

[0017] In this application, the front end of the sleeve can be fitted over and engaged with the nut of the bolt to be removed. Driven by a rotary drive source, the sleeve drives the bolt to rotate, thereby automatically loosening the bolt. In particular, after the threaded portion of the bolt is unscrewed from the fastened part, the rotary drive source continues to drive the sleeve and the bolt to rotate, creating a negative pressure at the engagement inner hole through the suction hole and suction channel. This reliably causes the sleeve to adhere to the nut of the bolt, thus reliably pulling the bolt out of the fastened part. Afterward, the rotary drive source stops operating, the negative pressure at the engagement inner hole disappears, and the bolt is removed from the engagement inner hole and falls off under the action of the ejector component. Therefore, this application utilizes the sleeve's built-in meshing inner hole, suction through hole, and suction channel to allow the sleeve to adhere to the bolt being removed during the rotation driven by the rotary drive source. This enables simple and reliable automatic removal of the bolt, eliminating the need for additional external claws. This simplifies the structure, reduces cycle time, improves bolt removal efficiency, and effectively avoids the loosening and jamming failures that are common with external claws. Attached Figure Description

[0018] Figure 1 and Figure 2 A schematic diagram illustrating the process of removing external hexagonal bolts using existing bolt removal equipment.

[0019] Figure 3 This is a schematic diagram of the bolt disassembly device based on negative pressure adsorption according to this application.

[0020] Figure 4 for Figure 3 A sectional view along line AA.

[0021] Figure 5 for Figure 3 Exploded view.

[0022] Figures 6a to 6e This is a schematic diagram of the working process of the bolt disassembly device based on negative pressure adsorption in this application.

[0023] Figure 7 for Figure 6d BB-direction sectional view.

[0024] Figure 8 for Figure 6d A structural diagram from another perspective.

[0025] Figure 9 for Figure 6e A structural diagram from another perspective.

[0026] ( Figure 8 and Figure 9 The fastened components have all been omitted.

[0027] Component designation explanation

[0028] 10 Rotary drive source

[0029] 11 Connecting shaft segment

[0030] 20 sleeves

[0031] 21 Meshing Inner Hole

[0032] 22 air intake holes

[0033] 23. Air intake channel

[0034] 24. Install inner hole

[0035] 30 Ejector Components

[0036] 31 Spring

[0037] 40 Fixing Screws

[0038] 50 connecting pins

[0039] 60 pins

[0040] 70 Elastic Rubber Ring

[0041] 80 bolts removed

[0042] 81 Nut

[0043] 91 Headboard

[0044] 92 Tailgate

[0045] 93 end plate

[0046] 94 Threaded hole Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0048] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0049] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0051] This invention provides a bolt removal device based on negative pressure adsorption, hereinafter referred to as a bolt removal device, used to remove bolts from fastened components. In the following embodiments, such as... Figures 6a to 6e As shown, the bolt to be removed is defined as the bolt to be removed 80, which is an external hexagonal bolt. The fastened components are the head plate 91 and tail plate 92 at both ends of the prestressed concrete pipe pile. The head plate 91 and tail plate 92 are each fixed to the outer end of the end plate 93 by several bolts to be removed 80. In addition, the axial direction of the bolt to be removed 80 is defined as the front-back direction, and the direction in which the bolt to be removed 80 is removed from the fastened component is the rear direction.

[0052] like Figures 3 to 5As shown, the bolt removal device based on negative pressure adsorption involved in this application includes a rotary drive source 10, a sleeve 20 driven by the rotary drive source 10, and an ejector component 30 installed in the sleeve 20. The front end of the sleeve 20 has a front-to-back extending engagement inner hole 21, which can accommodate the nut 81 of the bolt 80 to be removed and can engage with the outer peripheral surface of the nut 81. The front end of the ejector component 30 is telescopically placed in the engagement inner hole 21, and the front end of the ejector component 30 has a telescopic amount at least in the front-to-back direction. The sleeve 20 has a suction through hole 22 and a suction channel 23. The outer end of the suction through hole 22 communicates with the outside, and the inner end of the suction through hole 22 communicates with the engagement inner hole 21 via the suction channel 23. In particular, as... Figure 6d and Figure 7 As shown, the suction through hole 22 is eccentrically set. The eccentricity of the suction through hole 22 is as follows: the suction through hole 22 is eccentric to the sleeve 20 in the direction of rotation of the sleeve 20 when the bolt 80 is loosened. For example, if the sleeve 20 is in the counterclockwise direction when the bolt 80 is loosened, the radial through hole that is concentric with the sleeve 20 and extends radially along the sleeve 20 is shifted by a preset eccentric distance in the counterclockwise direction to form the eccentrically set suction through hole 22. Conversely, if the sleeve 20 is in the clockwise direction when the bolt 80 is loosened, the radial through hole that is concentric with the sleeve 20 and extends radially along the sleeve 20 is shifted by a preset eccentric distance in the clockwise direction to form the eccentrically set suction through hole 22.

[0053] The process of removing the bolts 80 using the above-mentioned bolt removal equipment is as follows: 1. If Figure 6a As shown, the nut 81 of the removed bolt 80 faces rearward, and the threaded portion of the removed bolt 80 passes through the through hole in the head plate 91 or tail plate 92 and is tightened in the threaded hole 94 of the end plate 93. 2. As Figure 6b As shown, the bolt removal device moves forward until the front end of the sleeve 20 is fitted onto the nut 81 of the bolt 80 to be removed. The nut 81 of the bolt 80 is then also accommodated in the engaging inner hole 21 of the sleeve 20, and the two engage. 3. As... Figure 6b As shown, the rotary drive source 10 actuates, driving the sleeve 20 to rotate at high speed. The rotation direction of the sleeve 20 driven by the rotary drive source 10 is the same as the rotation direction of the bolt 80 when it is unscrewed from the threaded hole 94 of the end plate 93. The sleeve 20, through the engagement of the inner hole 21 with the nut 81 of the bolt 80, drives the bolt 80 to rotate, thereby loosening the bolt 80 and unscrewing it from the threaded hole 94 of the end plate 93. Figure 6c As shown. 4. The rotary drive source 10 drives the sleeve 20 to continue rotating at high speed in the same direction. The high-speed rotating sleeve 20 will create negative pressure in the suction hole 22 and the suction channel 23, that is, negative pressure and suction will be formed at the meshing inner hole 21 at the front end of the sleeve 20, as shown. Figure 6d , Figure 7 and Figure 8 As shown, the sleeve 20 reliably engages the nut 81 of the bolt 80 when rotating it; thus, when the bolt removal device moves backward, it reliably pulls the bolt 80 out of the through hole in the head plate 91 or tail plate 92. 5. When the rotation drive source 10 stops, the negative pressure at the meshing inner hole 21 disappears, as... Figure 6e and Figure 9 As shown, the ejector component 30 causes the bolt 80 to be removed from the engagement hole 21 and fall off.

[0054] In summary, this application achieves the following sequential actions by using the rotary drive source 10 to drive the rotation of the sleeve 20, and by utilizing the sleeve 20's own meshing inner hole 21, suction through hole 22, and suction channel 23: loosening the bolt 80 to be removed, using negative pressure to attract the bolt 80 to be removed, and moving the bolt 80 to be removed backward. This application eliminates the need for external hooks and pulls the bolt 80 from the fixed part simply and reliably without adding extra actions, thereby achieving simple and reliable automatic disassembly of the bolt 80. This reduces the time occupied by the cycle time, improves the bolt disassembly efficiency, and effectively avoids the loosening and jamming failures that are easily caused by external hooks.

[0055] Furthermore, such as Figure 4 and Figure 5 As shown, the ejector component 30 is a spring 31, which extends back and forth along the axial direction of the bolt 80 to be removed. The rear end of the spring 31 is fixed in the sleeve 20, and the front end of the spring 31 is placed in the engagement inner hole 21. When the nut 81 of the bolt 80 to be removed is accommodated in the engagement inner hole 21, the spring 31 is in a compressed state, and the front end of the spring 31 abuts against the nut 81 of the bolt 80 to be removed. Thus, when the rotation drive source 10 stops operating, the negative pressure in the engagement inner hole 21 disappears, and the spring 31 can drive the bolt 80 to move forward, ejecting the bolt 80 from the engagement inner hole 21. Preferably, several fixing screws 40 are screwed into the sleeve 20, and the inner ends of the fixing screws 40 abut against the outer periphery of the spring 31, thereby fixing the rear end of the spring 31 in the sleeve 20.

[0056] Furthermore, such as Figure 4 , Figure 5 and Figure 7As shown, the sleeve 20 has an inner mounting hole 24, which extends straight back and forth and is coaxial with the sleeve 20. The spring 31 is accommodated in the inner mounting hole 24, which can extend and retract back and forth. The front end of the inner mounting hole 24 extends to the engagement inner hole 21. In this embodiment, the inner mounting hole 24 is used as the aforementioned suction channel 23, so the inner end of the suction through hole 22 extends to the inner mounting hole 24, thereby simplifying the internal structure of the sleeve 20 and reducing the processing cost of the sleeve 20. In addition, there are several suction through holes 22 in the sleeve 20, and the specific number is opened according to actual needs. The several suction through holes 22 are evenly arranged along the circumference of the sleeve 20. Figure 7 In the embodiment shown, the sleeve 20 has two suction holes 22.

[0057] Furthermore, in this embodiment, the rotary drive source 10 is an air wrench, and the output end of the air wrench is detachably connected to the sleeve 20. The wall of the meshing inner hole 21 at the front end of the sleeve 20 has a toothed surface structure, which can better mesh with the nut 81 of the bolt 80 being removed. Because the front end of the sleeve 20 and the nut 81 of the bolt 80 will frequently impact and rub against each other during the loosening of the bolt 80, the front end of the sleeve 20 is easily worn, making the sleeve 20 a consumable part. Thus, by detachably installing the sleeve 20 at the output end of the air wrench, the sleeve 20 can be replaced in a timely manner, ensuring that the sleeve 20 reliably drives the bolt 80 to rotate.

[0058] Furthermore, the preferred structure for the detachable connection of the sleeve 20 is as follows: Figures 3 to 5 As shown, the bolt removal device based on negative pressure adsorption also includes a connecting pin 50 and pins 60 detachably mounted at both ends of the connecting pin 50. The output end of the air wrench is provided with a connecting shaft section 11, which is inserted into the rear end of the sleeve 20. The connecting pin 50 is inserted radially into the connecting shaft section 11 and the sleeve 20. The two pins 60 abut against the outer periphery of the sleeve 20, thereby detachably connecting the sleeve 20 to the connecting shaft section 11 at the front end of the air wrench. Preferably, the connecting shaft section 11 is a square shaft section, and the sleeve 20 is provided with a square connecting hole that matches the connecting shaft section 11, which can play a positioning role when installing the sleeve 20.

[0059] Furthermore, such as Figure 4 and Figure 5 As shown, the bolt removal device based on negative pressure adsorption also includes an elastic rubber ring 70, which is fixed to the bottom surface of the engagement inner hole 21. In this embodiment, the elastic rubber ring 70 is fixed as follows: a groove is formed on the bottom surface of the engagement inner hole 21 by the sleeve 20, and the elastic rubber ring 70 is embedded in the groove by its own elasticity. When the bolt 80 to be removed is adsorbed in the engagement inner hole 21, as... Figure 6dAs shown, the rear end face of the nut 81 of the bolt 80 being removed abuts against the elastic rubber ring 70. The elastic rubber ring 70 increases the airtightness between the sleeve 20 and the end face of the nut 81 of the bolt 80 being removed, thereby strengthening the suction force generated by the negative pressure and more reliably adsorbing the bolt 80 being removed.

[0060] The working principle of the bolt removal equipment with the above structure is as follows.

[0061] I. For example Figure 6a As shown, the nut 81 of the removed bolt 80 faces backward, and the threaded portion of the removed bolt 80 passes through the through hole of the head plate 91 or the tail plate 92 and is tightened in the threaded hole 94 of the end plate 93.

[0062] II. Figure 6b As shown, the bolt removal device moves forward until the nut 81 of the bolt 80 to be removed is accommodated in the engaging inner hole 21 at the front end of the sleeve 20.

[0063] III. Figure 6b As shown, the pneumatic wrench drives the sleeve 20 to rotate at high speed, and the sleeve 20 drives the bolt 80 to be removed to rotate together, thereby loosening the bolt 80 and unscrewing it backward from the threaded hole 94 of the end plate 93, as shown. Figure 6c As shown.

[0064] Fourth, the air wrench drives the sleeve 20 to continue rotating at high speed in the same direction. The air wrench rotates at approximately 3500 rpm, causing a negative pressure to form within the suction hole 22 and suction channel 23 of the high-speed rotating sleeve 20. This, in turn, creates negative pressure and suction at the meshing inner hole 21 at the front end of the sleeve 20. As the sleeve 20 rotates, it creates a suction force that attracts the bolt 80 and its nut 81. Figure 6d , Figure 7 and Figure 8 As shown, the elastic rubber ring 70 further enhances the airtightness between the sleeve 20 and the end face of the nut 81 of the bolt 80 being removed, strengthening the suction force generated by the negative pressure. This suction force is greater than the forward pushing force of the spring 31, thereby reliably allowing the sleeve 20 to adhere to the rear end face of the nut 81 of the bolt 80 being removed. Subsequently, when the bolt removal device moves backward, it reliably pulls the bolt 80 being removed backward from the through hole of the head plate 91 or tail plate 92.

[0065] 5. When the pneumatic wrench stops rotating, the sleeve 20 also stops rotating. The negative pressure inside the sleeve 20 disappears, and therefore the negative pressure at the meshing inner hole 21 also disappears. Figure 6e and Figure 9 As shown, under the action of the spring 31 pushing forward, the bolt 80 to be removed moves forward from the engagement inner hole 21, and then the bolt 80 to be removed disengages from the sleeve 20 and falls to the designated position.

[0066] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A bolt disassembly device based on negative pressure adsorption, comprising a rotary drive source (10) and a sleeve (20) tractively connected to the rotary drive source (10), wherein the end of the sleeve (20) is provided with an engagement inner hole (21) for engaging with the outer circumferential surface of the nut (81) of the bolt (80) to be disassembled, characterized in that: It also includes an ejector component (30) installed in the sleeve (20), the end of which is telescopically placed in the engagement inner hole (21). The sleeve (20) has a suction through hole (22) and a suction channel (23). The outer end of the suction through hole (22) is connected to the outside, and the inner end of the suction through hole (22) is connected to the engagement inner hole (21) through the suction channel (23). The suction through hole (22) is eccentric to the sleeve (20) in the direction of rotation of the sleeve (20) when the bolt (80) is loosened.

2. The bolt disassembly device based on negative pressure adsorption according to claim 1, characterized in that: The ejector component (30) is a spring (31) extending axially along the bolt (80) being removed. One end of the spring (31) is fixed in the sleeve (20), and the other end of the spring (31) is placed in the engagement inner hole (21). When the nut (81) of the bolt (80) to be removed is accommodated in the engagement bore (21), the spring (31) is in a compressed state and abuts against the nut (81) of the bolt (80) to be removed.

3. The bolt disassembly device based on negative pressure adsorption according to claim 2, characterized in that: Several fixing screws (40) are screwed into the sleeve (20), and the inner end of the fixing screws (40) abuts against the outer periphery of the spring (31).

4. The bolt disassembly device based on negative pressure adsorption according to claim 2, characterized in that: The sleeve (20) has an installation inner hole (24), and the spring (31) is telescopically accommodated in the installation inner hole (24). One end of the installation inner hole (24) extends to the engagement inner hole (21). The installation inner hole (24) constitutes the air suction channel (23), and the inner end of the air suction through hole (22) extends to the installation inner hole (24).

5. The bolt disassembly device based on negative pressure adsorption according to claim 1 or 4, characterized in that: There are several suction holes (22), and the several suction holes (22) are evenly arranged along the circumference of the sleeve (20).

6. The bolt disassembly device based on negative pressure adsorption according to claim 1, characterized in that: The rotary drive source (10) is a pneumatic cannon, and the output end of the pneumatic cannon is detachably connected to the sleeve (20).

7. The bolt disassembly device based on negative pressure adsorption according to claim 6, characterized in that: It also includes a connecting pin (50) and pins (60) that are pluggably mounted on both ends of the connecting pin (50). The output end of the air gun is provided with a connecting shaft section (11). The connecting shaft section (11) is inserted into the sleeve (20). The connecting pin (50) is inserted into the connecting shaft section (11) and the sleeve (20). The two pins (60) respectively abut against the outer periphery of the sleeve (20).

8. The bolt disassembly device based on negative pressure adsorption according to claim 7, characterized in that: The connecting shaft segment (11) is a square shaft segment, and the sleeve (20) is provided with a square connecting hole that is adapted to the connecting shaft segment (11).

9. The bolt disassembly device based on negative pressure adsorption according to claim 1, characterized in that: It also includes an elastic rubber ring (70), which is fixed on the bottom surface of the engagement inner hole (21).

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