Mounting screw capable of adjusting length of screw rod

Abstract

The utility model relates to the technical field of installation screws, in particular to an installation screw with adjustable screw length, which comprises an installation screw sleeve, the installation screw sleeve comprises a first screw sleeve and a second screw sleeve, the first screw sleeve and the second screw sleeve are coaxially aligned, the first screw sleeve is provided with a first screw, and the second screw sleeve is provided with a second screw. The thread directions of the first screw rod and the second screw rod are opposite; the first screw can be in threaded fit with the first threaded sleeve to axially move, and the second screw can be in threaded fit with the second threaded sleeve to axially move. A third screw rod is formed at the bottom of the first screw rod; a third screw hole matched with the third screw rod is axially formed in the second screw sleeve; when the distance between two objects is large, the first threaded rod and the second threaded rod can be rotated, the first threaded rod can be in threaded fit with the first threaded sleeve to axially move, the second threaded rod can be in threaded fit with the second threaded sleeve to axially move, the overall length direction of the mounting screw is changed, and therefore the mounting screw can be suitable for connection of different distances; bolts with other sizes do not need to be replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to installation screw technical field especially, it relates to a kind of installation screw of adjustable screw rod length. BACKGROUND

[0002] Bolt is a kind of mechanical parts, need to cooperate with bolt cap, for fastening two objects with through hole, this connection form is called bolt connection, if nut is spun from bolt, again can make the two objects separate, so bolt connection is belong to detachable connection, is common fastening workpiece in life, applied in each field, bolt is easy to disassemble after installation, and use range is very wide, is the tool commonly used in various mechanical connections.

[0003] When the distance of two adjacent objects needing bolt is long, other size bolt is needed to be replaced for connection, and use is not changed. INVENTION CONTENTS

[0004] The utility model discloses a kind of installation screw of adjustable screw rod length to the deficiency of prior art.

[0005] To achieve the above object, the technical scheme of the utility model is as follows:

[0006] A kind of installation screw of adjustable screw rod length, including installation screw sleeve, installation screw sleeve includes the first screw sleeve in top and the second screw sleeve in bottom, the first screw sleeve and the second screw sleeve are coaxially aligned, the first screw sleeve is installed with first screw rod, the second screw sleeve is installed with second screw rod, the thread direction of first screw rod and second screw rod is opposite;First screw rod can be axially moved with the first screw sleeve thread cooperation, second screw rod can be axially moved with the second screw sleeve thread cooperation;First screw rod bottom is formed with third screw rod, the second screw sleeve is axially formed with the third screw hole matched with third screw rod.

[0007] Further: installation screw sleeve includes the side connecting strip connected between the first screw sleeve and the second screw sleeve, the number of side connecting strip is more than two, and equidistantly arranged in the periphery of first screw sleeve and second screw sleeve in ring shape.

[0008] Further: side connecting strip includes first connecting strip and second connecting strip, wherein first connecting strip is integrally connected with first screw sleeve, and second connecting strip is integrally connected with second screw sleeve.

[0009] Further: sliding connection structure is provided between first connecting strip and second connecting strip.

[0010] Further: sliding connection structure includes guide rod installed in the bottom of first connecting strip and guide hole formed in second connecting strip, and guide rod can axially slide in guide hole in a guided manner.

[0011] Further, the second connecting strip is axially formed with a limiting slot communicated with the guide hole, and the guide rod is provided at the end with a limiting block sliding in the limiting slot.

[0012] Further, the first screw rod top is formed with a circular ring connecting piece.

[0013] Further, the second screw rod bottom is formed with a hook piece.

[0014] The first screw rod top is connected with one of the objects, and the second screw rod is connected with the other object, so that the two spaced objects can be connected. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of the mounting screw.

[0016] Fig. 2 It is another structural schematic view of the mounting screw.

[0017] Fig. 3 It is a sectional structural schematic view of the mounting screw.

[0018] The reference signs include:

[0019] 1 - mounting screw,

[0020] 11 - first screw, 12 - second screw, 13 - first screw rod, 14 - second screw rod, 15 - third screw,

[0021] 16 - third screw hole, 17 - circular ring connecting piece, 18 - hook piece,

[0022] 2 - side connecting strip,

[0023] 21 - first connecting strip, 22 - second connecting strip, 23 - guide rod, 24 - guide hole, 25 - limiting slot,

[0024] 26 - limiting block. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below in combination with the drawings.

[0026] For example, Figs. 1-3As shown, the mounting screw with adjustable screw length comprises a mounting screw sleeve 1, the mounting screw sleeve 1 comprises a first screw sleeve 11 at the top and a second screw sleeve 12 at the bottom, the first screw sleeve 11 and the second screw sleeve 12 are coaxially aligned, the first screw sleeve 11 is provided with a first screw rod 13, the second screw sleeve 12 is provided with a second screw rod 14, the screw thread direction of the first screw rod 13 is opposite to that of the second screw rod 14; the first screw rod 13 can be axially moved in threaded cooperation with the first screw sleeve 11, and the second screw rod 14 can be axially moved in threaded cooperation with the second screw sleeve 12.

[0027] The top of the first screw rod 13 is connected with one of the objects, and the second screw rod 14 is connected with the other object, so that the two spaced objects can be connected, when the distance between the two objects is large, the first screw rod 13 and the second screw rod 14 can be rotated, the first screw rod 13 can be axially moved in threaded cooperation with the first screw sleeve 11, and the second screw rod 14 can be axially moved in threaded cooperation with the second screw sleeve 12, so that the overall length direction of the mounting screw changes, so that it can be applied to connection of different distances without replacing other size bolts.

[0028] In addition, the bottom of the first screw rod 13 is formed with a third screw rod 15, and the second screw sleeve 12 is axially formed with a third screw hole 16 matched with the third screw rod 15; the first screw rod 13 and the second screw rod 14 can be connected through the threaded connection mode of the third screw rod 15 and the third screw hole 16, which can reduce the radial swing of the first screw rod 13 and the second screw rod 14, and ensure the overall structural stability.

[0029] Preferably, the top of the first screw rod 13 is formed with a circular ring connecting piece 17, and the top of the first screw rod 13 can be connected with one of the objects through the circular ring connecting piece 17, so as to increase the connection mode.

[0030] Preferably, the bottom of the second screw rod 14 is formed with a hook piece 18, and the top of the second screw rod 14 can be connected with the other object through the hook piece 18, so as to increase the connection mode.

[0031] The mounting screw sleeve 1 comprises a side connecting strip 2 connected between the first screw sleeve 11 and the second screw sleeve 12, the number of the side connecting strip 2 is two or more, and the side connecting strip 2 is arranged in a ring shape at the periphery of the first screw sleeve 11 and the second screw sleeve 12 at equal intervals; the side connecting strip 2 comprises a first connecting strip 21 and a second connecting strip 22, wherein the first connecting strip 21 is integrally connected with the first screw sleeve 11, and the second connecting strip 22 is integrally connected with the second screw sleeve 12. Ensure the stability of the structure.

[0032] The sliding connection structure is arranged between the first connecting strip 21 and the second connecting strip 22, and comprises a guide rod 23 arranged at the bottom of the first connecting strip 21 and a guide hole 24 formed in the second connecting strip 22, the guide rod 23 being axially slidably guided in the guide hole 24.

[0033] Further, the second connecting strip 22 is axially formed with a limiting groove 25 communicated with the guide hole 24, and the guide rod 23 is arranged with a limiting block 26 slidably arranged in the limiting groove 25; when the first connecting strip 21 and the second connecting strip 22 are slidably connected, the limiting block 26 arranged at the end of the guide rod 23 only slides in the limiting groove 25, and the guide rod 23 cannot be separated from the guide hole 24, thereby preventing the first connecting strip 21 and the second connecting strip 22 from being separated from each other.

[0034] As can be seen from the above, the utility model has the excellent characteristics as described above, and can improve the performance of the prior art and has practicality, and becomes a product with high practical value.

[0035] The above is only the preferred embodiment of the utility model, and for the ordinary skilled in the art, the specific implementation and application range can be changed according to the thought of the utility model, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An installation screw with adjustable screw length, comprising an installation screw sleeve, characterized in that: The mounting screw sleeve comprises a first screw sleeve at the top and a second screw sleeve at the bottom, the first screw sleeve and the second screw sleeve are coaxially aligned, the first screw sleeve is provided with a first screw rod, the second screw sleeve is provided with a second screw rod, the screw thread directions of the first screw rod and the second screw rod are opposite; the first screw rod can axially move in thread cooperation with the first screw sleeve, the second screw rod can axially move in thread cooperation with the second screw sleeve; the bottom of the first screw rod is formed with a third screw rod, the second screw sleeve is axially formed with a third screw hole matched with the third screw rod.

2. The adjustable screw length mounting screw of claim 1, wherein: The mounting screw sleeve comprises a side connecting strip connected between the first screw sleeve and the second screw sleeve, the number of the side connecting strip is two or more, and the side connecting strip is arranged in a ring shape at the periphery of the first screw sleeve and the second screw sleeve at equal intervals.

3. A set screw with adjustable screw length according to claim 2, characterized in that: The side connecting strip comprises a first connecting strip and a second connecting strip, wherein the first connecting strip is integrally connected with the first screw sleeve, and the second connecting strip is integrally connected with the second screw sleeve.

4. The adjustable screw length mounting screw of claim 3, wherein: A sliding connection structure is arranged between the first connecting strip and the second connecting strip.

5. The adjustable screw length mounting screw of claim 4, wherein: The sliding connection structure comprises a guide rod mounted at the bottom of the first connecting strip and a guide hole formed in the second connecting strip, the guide rod can axially slide in the guide hole in a guided manner.

6. A set screw with adjustable screw length according to claim 5, characterized in that: The second connecting strip is further axially formed with a limiting slot communicated with the guide hole, and the end of the guide rod is provided with a limiting block sliding in the limiting slot.

7. The adjustable screw length mounting screw of claim 1, wherein: The top of the first screw rod is formed with a circular ring connecting piece.

8. The adjustable screw length mounting screw of claim 1, wherein: The bottom of the second screw rod is formed with a hook piece.

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