CN219262902U - Expansion nail with expansion block - Google Patents

Abstract

The utility model discloses an expansion nail with an expansion block, wherein at least one end of an inner cavity is provided with a first opening, the first opening is used for screwing in a screw, and the expansion block is arranged in the inner cavity; the side wall of the sleeve is provided with a plurality of expansion openings, the expansion openings are communicated with the inner cavity, the expansion openings are arrayed along the circumferential direction of the section of the sleeve, and the expansion openings are arranged around the expansion block. Compared with the prior art, the expansion block and the expansion opening are arranged in the technical scheme, so that the expansion block expands after being extruded, and meanwhile, the wall of the casing pipe around the expansion block is driven to bend and expand; the expansion block not only improves the expansion range of the sleeve, but also prevents the sleeve from being propped against rebound by the wall body after expansion, prevents the expansion nails from loosening, and further improves the stability of the expansion nails for fixing objects.

Description

Expansion nail with expansion block

Technical Field

The utility model relates to an expansion nail or a thermal insulation nail, in particular to an expansion nail with expansion blocks.

Background

Expansion bolts, also known as expansion bolts, are a common fixing member used in the construction field. The existing expansion screws are mainly divided into two main categories: firstly, arranging a plurality of cutting slits on the peripheral surface of an expansion pipe, when the expansion pipe is used, firstly placing the expansion pipe into a mounting hole, then screwing a screw into the expansion pipe, and as the screw is screwed into the expansion pipe, expanding the expansion pipe from the cutting slits by the rear end of the screw, wherein the outer surface of the expanded part of the expansion pipe is contacted with the wall of the mounting hole so as to fasten the screw into the mounting hole; secondly, a plurality of cutting slits are formed in one end, far away from the hole, of the expansion pipe, the rear end of the screw rod is provided with a spherical end, when the expansion pipe is used, the screw rod sleeved with the expansion pipe is placed into the installation hole, the front end of the expansion pipe is propped against the outside of the installation hole, then the screw rod is pulled out from the outside of the installation hole, and finally the spherical end on the screw rod enters the inside of the expansion pipe to prop up the rear end of the expansion pipe, so that the screw rod is fixedly arranged in the installation hole.

The common expansion screw is divided into a screw part and an expansion part, the screw is detached firstly to fix the expansion part when the expansion screw is used, then the screw penetrates through the expansion part to be fixed for a plurality of times, the conventional expansion screw is not very reliable in fixation, unstable in fixation and very easy to loosen, and if the load has larger vibration, the loosening can occur.

Disclosure of Invention

For this reason, it is desirable to provide an expansion nail having an expansion block to improve the stability of the fixed object of the expansion nail.

To achieve the above object, the present utility model provides an expansion nail having an expansion block, comprising: a casing and an expansion block; the sleeve is provided with an inner cavity, at least one end of the inner cavity is provided with a first opening, the first opening is used for screwing in a screw, the first opening is a screw screwing inlet, and the expansion block is arranged in the inner cavity; two or more expansion ports are arranged on the side wall of the sleeve, the two or more expansion ports are communicated with the inner cavity, the expansion ports are arrayed along the circumferential direction of the section of the sleeve, two adjacent expansion port gap partitions are expansion strips, the expansion ports are arranged around the expansion block, and the expansion ports are used as expansion contact points;

the expansion nail with the expansion block comprises an expansion device formed by combining a sleeve and the expansion block, and further comprises a screw, wherein the screw is screwed in through a first opening of the expansion device, when the screw is screwed in or penetrates through the expansion device, the expansion block is extruded to expand to the periphery, and the expansion strip is expanded outwards along with the expansion block, so that the drawing resistance is improved.

Further, the inflation port comprises one or more notches, the one or more notches are arranged on the inflation port, and the notches are used as inflation points for inflation.

Further, the sleeve is a metal sleeve, and the metal sleeve is a seamless metal sleeve or a seamed metal sleeve.

Further, the expansion block is a wood and bamboo fiber expansion block;

or the expansion block is a carbonized wood and bamboo expansion block;

or the expansion block is a nylon expansion block;

or the expansion block comprises: a plurality of expansion bars; the expansion strips are arranged along the length direction of the sleeve, and are arrayed along the width direction of the sleeve;

or the expansion assembly is made of metal materials, and can be expanded or extruded to cause the expansion strip to expand when the screw is screwed in.

Further, a baffle is further arranged on the sleeve, the baffle is a stop block, a support bar or a support bar, the baffle is fixedly arranged on the inner wall of the tail end of the sleeve, the baffle is arranged at one end of the expansion block, which is far away from the first opening, and the baffle is used for preventing the expansion block from sliding downwards when being extruded by a screw.

Further, when the baffle that sets up on the sleeve pipe is bracing piece or support bar, the sleeve pipe on be equipped with two first through-holes, two first through-holes set up relatively, just two first through-holes are arranged in the expansion piece is kept away from first open one end, two are arranged in respectively at the bracing piece both ends on the first through-hole, the bracing piece sets up of bending, the bracing piece is used for preventing the expansion piece is down sliding when receiving the screw extrusion, bracing piece or support bar tear open the elasticity branch strip that generates after the curved setting, open tensile effect when combining with the pore wall, still open sleeve pipe positioning effect when want to precession screw, make things convenient for the screw precession more.

Further, threads or/and a plurality of second through holes are formed in the inner wall of the sleeve, the second through holes are arrayed on the sleeve and generate internal threads, and the threads or/and the internal threads are used for enabling screws to pass through occlusion and screwing.

Further, the thread height of the thread arranged on the inner wall of the sleeve is unequal or/and the aperture of the internal thread generated by the arrangement of the second through hole arranged on the sleeve is different, and when the screw is screwed into the thread or/and the internal thread on the inner wall of the sleeve, the corresponding thread height of the thread is unequal or the external expansion force of the internal thread with different aperture is unequal.

Further, the device also comprises a disc; the disc is arranged above the first opening, and is a metal disc or a nylon disc, and the disc is connected with the sleeve or/and fixed through screw connection.

Further, the sleeve is provided with a reverse branch which is integrated with the sleeve and used for improving the tensile force and the pulling force of the expansion nail.

Compared with the prior art, the technical scheme is characterized in that the expansion block is expanded after being extruded by the arrangement of the expansion block and the expansion opening, and meanwhile, the casing pipe wall (namely the expansion strip) around the expansion block is driven to be bent and expanded; the expansion block not only improves the expansion range of the sleeve, but also prevents the sleeve from being propped against rebound by the wall body after being expanded, prevents the expansion nails from loosening, and further improves the stability of the expansion nail fixing object.

The expansion block has the advantages that when the expansion block adopts a wood block or a bamboo block, carbonization treatment is carried out, and when the expansion block subjected to carbonization treatment is used, the expansion block is not easy to age and deteriorate due to the carbonization treatment, so that the expansion block is safer and firmer to apply, has extremely low cost and is more practical.

The external expansion device has the advantages that the internal threads are formed by arranging threads with unequal thread heights of threads arranged on the inner wall of the sleeve or/and different apertures of the second through holes arranged on the sleeve, and when the screw threads pass through the threads with unequal thread heights or/and the internal threads formed by arranging the second through holes with different apertures, the external expansion forces of the corresponding parts of the screws passing through the second through holes with unequal thread heights or different apertures are unequal. Through this function, can arrange the line tooth or/and the second through-hole of arranging from big to small aperture from low to high from screw inlet end to tail end at the sleeve pipe, can form the tail end and expand more and the interior big outside little anti-pulling force effect that screw inlet end expanded less when using the screw to advance, it is noted that the sleeve pipe of this scheme is the slotted sleeve pipe, conveniently expands, combines the expansion piece system to use again, and the effect can be better.

Drawings

FIG. 1 is an assembly view of the sleeve, expansion block, circle and screw;

FIG. 2 is a cross-sectional view of the sleeve;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a view showing the structure of the sleeve and the disc.

Reference numerals illustrate:

1. a sleeve; 2. an expansion block; 3. a disc; 4. a screw; 5. an expanding strip is introduced; 6. a slit;

11. an inner cavity; 12. a first opening; 13. an expansion port; 14. a second through hole; 15. a first through hole;

131. and (5) a notch.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 to 4, the present utility model provides an expansion nail having an expansion block, which can be used as an expansion nail or a heat insulation nail, the expansion nail of the present utility model comprising: a casing 1 and an expansion block 2; the sleeve 1 has an inner cavity 11, and at least one end of the inner cavity 11 has a first opening 12. The expansion nail with the expansion block comprises an expansion device formed by combining a sleeve and the expansion block, and further comprises a screw (which can be a self-tapping screw), wherein the first opening 12 is used for screwing in the screw 4, and the expansion block 2 is arranged in the inner cavity; two or more expansion openings 13 are arranged on the side wall of the sleeve 1, the two or more expansion openings 13 are communicated with the inner cavity 11, the expansion openings 13 are arrayed along the circumferential direction of the section of the sleeve 1, or the expansion openings 13 are arrayed along the circumferential direction of the section of the sleeve 1, two adjacent expansion openings 13 are mutually independent, and the expansion openings 13 are arranged around the expansion block 2. Adjacent two draw the expansion port mutually independent, adjacent two draw expansion port clearance interval and be drawing expansion strip 5, a plurality of draw the expansion port around the expansion block sets up, draw the expansion port as the expansion draw the contact point use, the priority is followed and is drawn the expansion port department to expand promptly when expanding. The expansion nail with the expansion block is an expansion device formed by combining a sleeve and the expansion block, a screw is screwed in through a first opening of the expansion device, when the screw is screwed in or penetrates through the part of the expansion device where the expansion block is arranged, the expansion block is extruded to expand to the periphery, and the expansion strip 5 is expanded outwards along with the expansion block, so that the drawing resistance is improved.

In certain embodiments, the inflation port 13 includes one or more indentations 131, the one or more indentations 131 being disposed on the inflation port 13. When the number of the notches 131 is plural, the notches 131 may be disposed on two sides of the expansion opening 13, and the notches 131 on two opposite sides of two adjacent expansion openings 13 are spaced, and the notches are used as expansion points. The sleeve 1 may be a cylindrical sleeve 1 or a conical sleeve 1; preferably, the sleeve 1 is a cylindrical sleeve 1; in some embodiments the side wall of the sleeve 1 is provided with a slit 6 (as shown in fig. 1), i.e. the sleeve of the utility model may be a slit metal sleeve, in some embodiments also a seamless metal sleeve. Preferably a slotted metal sleeve, so that the sleeve of the utility model can be formed by one-step stamping, thereby reducing the cost. When the screw 4 is screwed into the slit, the sleeve 1 can be easily spread to the periphery, namely the corresponding hole is dead, the sleeve is opened to the expanding effect through the slit 6, and can be tightly meshed with the hole wall when the screw is screwed in, so that the drawing resistance is directly improved. Threads are arranged on the inner wall and the outer wall of the sleeve 1 and are used for improving the tensile pulling force of the expansion nail.

It should be further noted that the expansion block 2 is disposed at the bottom of the inner cavity 11, i.e., at the end of the inner cavity 11 away from the first opening 12; when the screw 4 is screwed out from the first opening 12 and presses the expansion block 2, the expansion block 2 expands to the surrounding, thereby pressing the sleeve 1 and driving the sleeve 1 to expand to the surrounding; the bottom of the inner cavity 11 is filled by the arrangement of the expansion block 2, so that the space redundancy in expansion is reduced, and the screw 4 directly acts on the inner wall of the casing 1 by extruding the expansion block 2; the initiation of the expansion strip 5 is better; in the conventional expansion nail, after the screw 4 is screwed into the inner cavity 11, the inner cavity 11 is filled first, and then the inner wall of the sleeve 1 is extruded, that is, the screw directly acts on the sleeve, and the expansion force or expansion range is limited. The space between the inner cavity 11 and the inner wall of the sleeve 1 is filled by the expansion block through the arrangement of the expansion block 2, and the expansion block can be better expanded to the periphery through the extrusion of screw screwing force. It should be further noted that the expansion port 13 penetrates through the sidewall of the casing 1, and a plurality of expansion ports 13 are disposed around the expansion block 2; the length of the expansion opening 13 is arranged along the length direction of the sleeve 1, and a plurality of expansion openings 13 are uniformly distributed; each of the two sides of the expansion opening 13 is provided with one or more notches 131, the notches 131 are symmetrically arranged on the two sides of the expansion opening 13, the multiple notches 131 connected to the same expansion opening 13 are not directly conducted with each other, and the multiple notches 131 positioned on one side of the expansion opening 13 are spaced at a certain distance. It should be further noted that the plurality of notches 131 located on different inflation ports 13 are not conductive to each other; due to the provision of the indentations 131, the location of the indentations 131 with respect to the expansion bead 5 is weak, where the expansion block 2 will easily expand outwards when it expands; the inner cavity 11 around a certain section provided with the expansion opening 13 is an expansion area.

It should be further noted that, in practice, the screw 4 passes through the first opening 12 and enters the inner cavity 11, the upper half of the sleeve 1 is expanded by pressing the inner wall of the sleeve 1, the screw 4 is screwed in continuously, when the screw 4 is screwed in to press the expansion block 2, the screw 4 presses the expansion block 2 to expand the expansion block 2 explosively, and the expansion strip 5 of the sleeve also expands together; the sleeve 1 begins to expand just as the screw 4 presses the expansion block 2.

According to the technical scheme, through the arrangement of the expansion block 2, the expansion opening 13 and the notch 131, the expansion block 2 expands after being extruded, and meanwhile, the expansion strips 5 of the sleeve 1, which are positioned around the expansion block 2, are driven to bend and expand; the expansion block 2 not only improves the acting force and expansion range of the expansion strip 5, but also prevents the sleeve 1 from being propped against rebound by the wall body after expansion, prevents the expansion nails from loosening, and further improves the stability of the expansion nail fixing object.

In some embodiments, to further increase the expansion range of the distal end of the cannula 1, in some embodiments, the expansion block 2 is positioned at an end of the lumen 11 distal from the first opening 12; of course, in some embodiments, the expansion block 2 may be disposed at an end of the inner cavity 11 near the first opening 12, that is, the screw 4 starts to press the expansion block 2 after being screwed into the casing 1. It should also be noted that, in order to increase the rigidity of the sleeve 1 itself, to prevent the sleeve 1 from being damaged when the screw 4 is screwed in, thereby affecting the fixing quality, the sleeve 1 is preferably a metal sleeve 1; of course, in some embodiments, the sleeve 1 may be made of other materials, and the sleeve 1 and the expansion block 2 are not integrally formed.

Referring to fig. 2 and 3, in order to prevent the expansion block 2 from moving downward when being pressed, and ensure that the screw 4 can be screwed into or embedded into the expansion block 2 to achieve the expansion effect, in some embodiments, the expansion block 2 is a wood, bamboo fiber expansion block 2 or a nylon expansion block 2; or the expansion block comprises: a plurality of expansion bars; the expansion strips are arranged along the length direction of the sleeve, and are arrayed along the width direction of the sleeve. Preferably, the wood and bamboo fiber expansion blocks can be carbonized wood blocks and bamboo blocks, and when the expansion blocks subjected to carbonization treatment are used, the expansion blocks are not easy to age and deteriorate due to the carbonization treatment, so that the expansion blocks are safer and firmer to apply, have extremely low cost and are more practical. It should be noted that, the expansion block 2 may further include a plurality of expansion strips, a plurality of expansion strips are disposed along the length direction of the casing 1, that is, a plurality of expansion strips are disposed vertically, and a plurality of expansion strips are arranged in a compact array. Or the expansion block 2 is an expansion assembly made of metal materials, and can be expanded or extruded to cause expansion of the expansion strips when the screw is screwed in. The expansion strips vertically arranged prevent the expansion block 2 from sliding downwards when being extruded, specifically, when the screw 4 is screwed into the expansion block 2, the tip of the screw 4 is inserted into the gaps between the expansion strips, the expansion strips are extruded to the periphery of the screw 4 through continuous penetration of the screw 4, and the expansion direction of the expansion strips is perpendicular to the screwing direction of the screw 4.

In some implementations, the other end of the lumen 11 has a second opening. The second opening is far away from the first opening 12, and a slit 6 which is convenient for the expansion of the sleeve 1 is also arranged on the sleeve 1 around the second opening, and can be communicated from the first opening 12 to the second opening; specifically, when the screw 4 is screwed to the second opening, the sleeve 1 is pressed by the screw 4 to be opened outwards, and the slit facilitates the opening of the sleeve 1.

In some implementations, a baffle is further disposed on the sleeve 1, the baffle is fixedly disposed on an inner wall of the sleeve 1, and the baffle is disposed at an end of the expansion block 2 away from the first opening 12, and is used for preventing the expansion block 2 from sliding downward when being extruded by the screw 4. When screwing into the expansion block 2, the expansion block 2 will slide downward, and in order to prevent the expansion block 2 from sliding downward, the baffle is disposed at an end of the expansion block 2 away from the first opening 12; specifically, when the expansion block 2 slides downward, the baffle will abut under the expansion block 2, giving the expansion block 2 an upward force; thus, the expansion block can be ensured to expand at the set position.

Of course, in other embodiments, the sleeve 1 is further provided with a support rod and two first through holes 15, the two first through holes are oppositely disposed, the two first through holes are disposed at one end of the expansion block 2 away from the first opening 12, two ends of the support rod are disposed on the two first through holes respectively, the support rod is bent, and the support rod is used for preventing the expansion block 2 from sliding downwards when being extruded by the screw 4. The arrangement of the first through hole and the support rod further improves the engagement effect of the expansion nail and the hole wall while preventing the expansion block 2 from moving downwards, and prevents the sleeve 1 from rotating along with the screw 4; specifically, the tail end of the sleeve 1 is provided with the first through hole 15, a supporting rod is implanted in the first through hole 15, the supporting rod is a metal strip or a metal spring rod, and the supporting rod after implantation is exposed at the supporting strips at the two sides of the sleeve and is bent. When the expansion block 2 is extruded by the screwing force of the screw screwing, the support rod plays a role in resisting, and the expansion block 2 is ensured to expand in a set area. The first through hole 15 may be a round hole or a square hole, etc. which is convenient for the supporting rod to pass through, and a stamping process may be adopted.

The supporting rod can also be opened to the meshing effect with Kong Biqi which is preset, specifically, when the screw is screwed in, the outer wall of the sleeve 1 is not rotated simultaneously with the screw because of the meshing effect of the supporting rod and the hole wall, and the positioning effect is started, so that the screw is more convenient to screw in.

Referring to fig. 4, in some embodiments, the disc 3 is also included; the disc 3 is placed over the first opening 12, and the disc 3 is a metal disc 3 or a nylon disc 3. The disc 3 is disposed at one end of the sleeve 1 near the first opening 12, and the disc 3 is a nylon disc 3 or a metal disc 3. It should be noted that, the disc 3 is a fixed disc 3, and the fixed disc 3 increases the contact area between the head of the screw 4 and the wall or the object to be fixed, so as to prevent the head of the screw 4 from sinking into the wall or the object to be fixed; meanwhile, the contact surface between the screw 4 head and the wall body or the fixed object is increased, so that the screw 4 head is prevented from penetrating through the surface of the object to be fixed in the moving process. The disc 3 is connected with the sleeve 1 or/and fixed through screw connection, and the disc 3 and the sleeve 1 can be of an integral structure or a discrete structure.

In some embodiments, threads or/and a plurality of second through holes 14 are further disposed on the inner wall of the sleeve 1, the plurality of second through holes 14 are arranged on the sleeve 1 in an array manner, the plurality of second through holes 14 are communicated with the inner cavity 11, and the plurality of second through holes are arranged on the sleeve in an array manner and generate internal threads. The screw thread or/and the internal screw thread are used for screwing the screw through occlusion. The second through hole 14 penetrates through the side wall of the sleeve 1, that is, the second through hole 14 is communicated with the inner cavity 11; when the screw 4 is screwed into the sleeve 1, the threads on the outer side wall of the screw rod are meshed with the threads or the second through hole 14, and meanwhile, the friction force between the second through hole 14 and the hole wall is increased, so that the tensile pulling force of the expansion nail is improved.

In some embodiments, the thread height of the thread arranged on the inner wall of the sleeve is unequal or/and the aperture of the internal thread generated by the arrangement of the second through hole arranged on the sleeve is different, and when the screw is screwed into the thread or/and the internal thread on the inner wall of the sleeve, the corresponding thread height of the thread is unequal or the external expansion force of the internal thread with different aperture is unequal. By unequal expansion forces, the tensile pull-out force of the expansion nail can be improved. Preferably, the sleeve can be provided with the second through holes from low to high thread or from large to small aperture from the screw inlet end to the tail end, when the screw is screwed in, the effect of resisting the pulling force of the tail end expanding more and the screw inlet end expanding less and the inner large and outer small can be formed, and the sleeve in the scheme is a seamed sleeve, is convenient to expand and is used in combination with an expansion block system, so that the effect can be better.

The sleeve 1 is externally provided with a reverse branch, the reverse branch is integrated with the sleeve, namely, one-time stamping forming can be adopted, and the direction of the reverse branch points to the top end from the bottom end of the sleeve 1 and is used for improving the tensile pulling force effect of the expansion nail.

It should be noted that, when the expansion block is an expansion assembly made of metal material, the expansion block can be expanded or extruded to expand the expansion strip when the screw is screwed in; the expansion assembly can be composed of metal support strips, the metal support strips can be folded, the head end and the tail end of the support strips face the end of the screw driver inlet, and the expansion assembly can be arranged at any place as long as the expansion assembly can expand or be extruded to expand the expansion strips when the screw driver is screwed in.

It should be noted that the product has many holes, multiple expansion openings, notches and the like, and is complicated to process, in fact, otherwise, the product preferably adopts a metal plate, a die corresponding to key parts such as the opening, the expansion opening, the notch, the screw thread and the like is preset, the preset product metal plate is rapidly punched through the die, then the predicted product metal plate is looped into a metal seamed sleeve, and the metal seamed sleeve has the application conditions of the utility model.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solution, directly or indirectly, to other relevant technical fields, all of which are included in the scope of the utility model.

Claims (10)

1. An expansion nail having an expansion block, comprising: a casing and an expansion block; the sleeve is provided with an inner cavity, at least one end of the inner cavity is provided with a first opening, the first opening is used for screwing in a screw, the first opening is a screw screwing inlet, and the expansion block is arranged in the inner cavity; two or more expansion ports are arranged on the side wall of the sleeve, the two or more expansion ports are communicated with the inner cavity, the expansion ports are arrayed along the circumferential direction of the section of the sleeve, two adjacent expansion port gap partitions are expansion strips, the expansion ports are arranged around the expansion block, and the expansion ports are used as expansion contact points;

the expansion nail with the expansion block comprises an expansion device formed by combining a sleeve and the expansion block, and further comprises a screw, wherein the screw is screwed in through a first opening of the expansion device, when the screw is screwed in or penetrates through the expansion device, the expansion block is extruded to expand to the periphery, and the expansion strip is expanded outwards along with the expansion block, so that the drawing resistance is improved.

2. An expansion pin with expansion block according to claim 1, wherein said expansion port comprises one or more indentations, said one or more indentations being placed on said expansion port, said indentations being used as expansion points for expansion.

3. An expansion nail with expansion blocks according to claim 1, wherein the sleeve is a metal sleeve, and the metal sleeve is a seamless metal sleeve or a seamed metal sleeve.

4. An expansion nail with expansion blocks according to claim 1, wherein the expansion blocks are wood and bamboo fiber expansion blocks;

or the expansion block is a carbonized wood and bamboo expansion block;

or the expansion block is a nylon expansion block;

or the expansion block comprises: a plurality of expansion bars; the expansion strips are arranged along the length direction of the sleeve, and are arrayed along the width direction of the sleeve;

or the expansion assembly is made of metal materials, and can be expanded or extruded to cause the expansion strip to expand when the screw is screwed in.

5. The expansion nail with expansion block according to claim 1 or 4, wherein a baffle is further arranged on the sleeve, the baffle is a stop block, a support bar or a support bar, the baffle is fixedly arranged on the inner wall of the tail end of the sleeve, the baffle is arranged at one end of the expansion block, which is far away from the first opening, and the baffle is used for preventing the expansion block from sliding downwards when being extruded by a screw.

6. The expansion nail with expansion block according to claim 5, wherein when the baffle plate arranged on the sleeve is a supporting rod or a supporting bar, two first through holes are arranged on the sleeve, the two first through holes are oppositely arranged, the two first through holes are arranged at one end of the expansion block, which is far away from the first opening, the two ends of the supporting rod are respectively arranged on the two first through holes, the supporting rod is bent, the supporting rod is used for preventing the expansion block from sliding downwards when being extruded by a screw, and the elastic supporting bar generated after the supporting rod or the supporting bar is detached and bent is combined with a hole wall to play a tensile role, and when the screw is to be screwed in, the sleeve positioning role is started, so that the screw is more convenient to screw in.

7. The expansion nail with the expansion block according to claim 1, wherein threads or/and a plurality of second through holes are arranged on the inner wall of the sleeve, the second through holes are arrayed on the sleeve and generate internal threads, and the threads or/and the internal threads are used for screwing through occlusion by a screw.

8. The expansion nail with expansion block according to claim 7, wherein the thread height of the thread arranged on the inner wall of the sleeve is unequal or/and the aperture of the internal thread generated by the arrangement of the second through holes arranged on the sleeve is different, and when the screw is screwed into the thread or/and the internal thread on the inner wall of the sleeve, the corresponding thread height of the thread is unequal or the external expansion force of the internal thread with different aperture is unequal.

9. The expansion nail with expansion block according to claim 1, further comprising a disc; the disc is arranged above the first opening, and is a metal disc or a nylon disc, and the disc is connected with the sleeve or/and fixed through screw connection.

10. An expansion nail with expansion block according to claim 1 or 9, wherein the sleeve is provided with a reverse branch which is integrated with the sleeve and is used for improving the pulling and pulling resistance of the expansion nail.

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