CN219404169U - Bolt mounting tool - Google Patents

Abstract

The utility model belongs to the technical field of mechanical assembly, and discloses a bolt installation tool which comprises a bracket, a first screw, a second screw and a limiting piece. The bracket is provided with a first connecting part and a second connecting part which are oppositely arranged; the first screw rod is in threaded connection with the first connecting part, and the end part of the first screw rod can be matched with the head part of the first bolt to be installed; the second screw rod is in threaded connection with the second connecting part, and the end part of the second screw rod can be matched with the head part of the second bolt to be installed; the limiting piece is detachably connected to the support, and when the first screw rod and the second screw rod move towards the direction close to each other, the limiting piece is used for limiting movement of the first bushing matched with the first bolt to be installed and movement of the second bushing matched with the second bolt to be installed. The bolt installation tool can realize one-time installation of two groups of opposite bolts in a narrow space, greatly reduces the bolt installation difficulty caused by heavier components and inconvenience in coordination, and improves the installation quality of the bolts.

Description

Bolt mounting tool

Technical Field

The utility model relates to the technical field of mechanical assembly, in particular to a bolt installation tool.

Background

In the assembly process, the fasteners are mainly divided into two categories, namely bolts and rivets, and the bolts are commonly used for detachable structural connection parts. For joints which need repeated disassembly and assembly and bear larger loads, bolt connection is mostly adopted. When the bolts are installed, the bolts should be pushed in along the axes of the holes, and when the bolts are difficult to install, auxiliary tools (such as copper bars or plastic hammers) can be adopted to drive the bolts in along the axes of the holes.

In the assembly process of the aircraft, the common bolts in the open space are assembled by tools such as a socket or a spanner, and the like, so that the operation is simple and convenient, and the construction efficiency is high. In a narrow space region, such as the connection of an inner flap cabin box section assembly and an inner flap cabin cover plate assembly of a wing, two connectors are respectively provided with a bolt, and two opposite bolt assemblies comprise washers, nuts, cotter pins and floating flat bushings. Because the space limitation is very large and the components are heavy, the joint is inconvenient to dock, so that only one person can prop against the floating flat bushing, and the other person can strike the bolt head by using a copper rod or a plastic hammer to drive the bolt along the axis of the hole, and finally, two groups of coaxial bolts are respectively installed. The assembly mode has the problems of inconvenient tool use, difficult force application, complicated installation and low efficiency, and seriously influences the assembly quality and the assembly efficiency of the aircraft.

Accordingly, there is a need for a bolt installation tool that addresses the above-described problems.

Disclosure of Invention

The utility model aims to provide a bolt installation tool which can realize one-time installation of two groups of opposite bolts in a narrow space, greatly reduce the bolt installation difficulty caused by heavier components and inconvenience in coordination, and improve the bolt installation quality.

To achieve the purpose, the utility model adopts the following technical scheme:

a bolt installation tool comprising:

the bracket is provided with a first connecting part and a second connecting part which are oppositely arranged;

the first screw rod is in threaded connection with the first connecting part, and the end part of the first screw rod can be matched with the head part of the first bolt to be installed;

the second screw rod is in threaded connection with the second connecting part, and the end part of the second screw rod can be matched with the head part of a second bolt to be installed;

and the limiting piece is detachably connected to the bracket, and when the first screw rod and the second screw rod move towards directions close to each other, the limiting piece is used for limiting the movement of the first bushing matched with the first to-be-installed bolt and the movement of the second bushing matched with the second to-be-installed bolt.

Optionally, the locating part includes first cushion and the second cushion that the interval set up, first cushion with first connecting portion is just right, the second cushion with second connecting portion is just right, offer first constant head tank and second constant head tank on the support, first cushion can insert in the first constant head tank, the second cushion can insert in the second constant head tank.

Optionally, the end face of the first cushion block, facing the first screw rod, is used for abutting against the first bushing and deviating from the side face of the first bolt to be installed, a first avoiding hole is formed in the first cushion block in a penetrating mode, the first avoiding hole and the first screw rod are coaxially arranged, and the rod portion of the first bolt to be installed can penetrate through the first avoiding hole;

the second cushion block faces the end face of the second screw rod and is used for propping against the second bushing to deviate from the side face of the second bolt to be installed, a second avoiding hole is formed in the second cushion block in a penetrating mode, the second avoiding hole and the first screw rod are coaxially arranged, and the rod portion of the second bolt to be installed can penetrate through the second avoiding hole.

Optionally, the limiting piece further includes a first top block, the first top block includes a first limiting portion and a first installation portion that are connected, a diameter of the first limiting portion is greater than a diameter of the first installation portion, the first top block further includes a first through hole penetrating through the first limiting portion and the first installation portion, the first through hole is coaxial with the first avoiding hole, the first installation portion is in threaded connection with the first avoiding hole, an end portion of the first installation portion extends out of the first avoiding hole and can be in butt joint with the first bushing, and the first limiting portion is in butt joint with an end face of the first cushion block, which faces away from the first screw rod;

the locating part still includes the second kicking block, the second kicking block is including the second spacing portion and the second installation department that link to each other, the diameter of second spacing portion is greater than the diameter of second installation department, the second kicking block still including running through the second spacing portion with the second through-hole of second installation department, the second through-hole with the hole is dodged to the second is coaxial, second installation department threaded connection in the hole is dodged to the second, the tip of second installation department stretches out the hole is dodged to the second, can with second bush butt, the spacing portion butt of second in the second cushion deviates from the terminal surface of second screw rod.

Optionally, a first positioning hole is formed in the bottom of the first positioning groove in a penetrating manner, a first connecting hole is formed in a position, corresponding to the first positioning hole, of the first cushion block, and a first connecting bolt is sequentially connected to the first positioning hole and the first connecting hole in a threaded manner;

the tank bottom of the second positioning groove is penetrated and provided with a second positioning hole, a second connecting hole is arranged at a position on the second cushion block corresponding to the second positioning hole, and a second connecting bolt is sequentially connected with the second positioning hole and the second connecting hole in a threaded manner.

Optionally, the first screw rod further comprises a first adapter sleeve, the first screw rod comprises a first limit head, a first thread section and a first connector which are connected in sequence, the first thread section is in threaded connection with the first connector, and the first adapter sleeve is movably connected to the first connector and can be matched with the head of the first bolt to be installed;

still include the second switching sleeve, the second screw rod is including the second limit head, second screw thread section and the second connector that connect gradually, the second screw thread section with second connecting portion threaded connection, second switching sleeve swing joint in the second connector can with the head cooperation of second waiting the installation bolt.

Optionally, the first adapter sleeve comprises a first adapter part and a first adapting part which are connected, the first adapter part is movably sleeved outside the first connector, and the first adapting part can be matched with the head part of the first bolt to be installed;

the second adapter sleeve comprises a second adapter part and a second adapting part which are connected, the second adapter part is movably sleeved outside the second connector, and the second adapting part can be matched with the head part of the second bolt to be installed.

Optionally, a first cavity is formed in the first connection portion, a first threaded hole communicated with the first cavity is further formed in the first connection portion, the first screw further comprises a first transition section arranged between the first threaded section and the first connection head, the diameter of the first transition section is smaller than that of the first connection head, the first connection head can be in threaded connection with the first threaded hole, and the first connection head can also extend into the first cavity;

the second connecting part is internally provided with a second cavity, the second connecting part is also provided with a second threaded hole communicated with the second cavity, the second screw rod further comprises a second transition section arranged between the second threaded section and the second connector, the diameter of the second transition section is smaller than that of the second connector, the second connector can be in threaded connection with the second threaded hole, and the second connector can also extend into the second cavity.

Optionally, the diameter of the first positioning head is larger than the diameter of the first threaded section, and the diameter of the first threaded section is not smaller than the diameter of the first connecting head;

the diameter of the second limiting head is larger than that of the second threaded section, and the diameter of the second threaded section is not smaller than that of the second connector.

Optionally, the bracket is U-shaped, C-shaped or V-shaped.

The utility model has the beneficial effects that:

the utility model provides a bolt installation tool which comprises a bracket, a first screw rod, a second screw rod and a limiting piece. When the screw is used, the first screw and the second screw are screwed to proper lengths respectively, and then the head of the first bolt to be installed is matched with the end part of the first screw, and the head of the second bolt to be installed is matched with the end part of the second screw; and finally, continuously screwing the first screw rod and the second screw rod until the first bolt to be installed and the second bolt to be installed are respectively screwed to the installation positions. In the installation of two sets of bolts, first screw rod and second screw rod are to the direction motion that is close to each other, and first bush with first wait to install bolt complex and second bush with second wait to install bolt complex can be spacing by the locating part, prevent it to take place to remove to accomplish the disposable installation of two sets of opposite directions bolts smoothly, easy operation has greatly reduced the bolt installation degree of difficulty because of spare part is heavier and coordinate inconvenient bringing each other, has promoted the installation quality of bolt. Meanwhile, the bolt installation tool is detachable in integral structure, convenient to install and operate in a narrow space, and convenient to detach after two groups of bolts are installed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a bolt installation tool according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a bolt installation tool provided by an embodiment of the present utility model;

FIG. 3 is a side view of a bolt installation tool provided in an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a first screw and a first adapter sleeve provided by an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a stent provided by an embodiment of the present utility model;

fig. 6 is a cross-sectional view of a first head block provided by an embodiment of the present utility model.

In the figure:

1. a bracket; 11. a first connection portion; 12. a second connecting portion; 13. a first positioning groove; 131. a first positioning hole; 14. a second positioning groove; 141. a second positioning hole;

2. a first screw; 21. a first positioning head; 22. a first thread segment; 23. a first connector; 24. a first transition section;

3. a second screw;

4. a limiting piece; 41. a first pad; 411. a first avoidance hole; 412. a first connection hole; 42. a second cushion block; 43. a first top block; 431. a first limit part; 432. a first mounting portion; 433. a first through hole; 44. a second top block; 45. a first connecting bolt; 46. a second connecting bolt;

51. a first adapter sleeve; 511. a first transfer section; 5111. a first cavity; 5112. a first threaded hole; 512. a first adapting section; 52. the second adapter sleeve.

Detailed Description

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The embodiment provides a bolt installation tool, which is mainly used for installing two groups of opposite bolts. As shown in fig. 1 to 3, the bolt installation tool includes a bracket 1, a first screw 2, a second screw 3, and a stopper 4.

Wherein the bracket 1 has a first connection portion 11 and a second connection portion 12 disposed opposite to each other. The first screw 2 is screwed with the first connecting portion 11, and an end portion of the first screw 2 can be fitted with a head portion of a first bolt to be mounted. The second screw 3 is in threaded connection with the second connecting portion 12, and the end portion of the second screw 3 can be matched with the head portion of the second bolt to be mounted. The limiting piece 4 is detachably connected to the bracket 1, and when the first screw rod 2 and the second screw rod 3 move towards each other, the limiting piece 4 is used for limiting the movement of the first bushing matched with the first bolt to be installed and the movement of the second bushing matched with the second bolt to be installed.

That is, in use, the bolt installation tool is first screwed to the appropriate length of the first screw 2 and the second screw 3, respectively, and then the head of the first bolt to be installed is fitted to the end of the first screw 2, and the head of the second bolt to be installed is fitted to the end of the second screw 3; finally, the first screw rod 2 and the second screw rod 3 are continuously screwed until the first bolt to be installed and the second bolt to be installed are respectively screwed to the installation positions. In the installation of two sets of bolts, first screw rod 2 and second screw rod 3 move to the direction that is close to each other, with first bush of waiting to install bolt complex and with second bush of waiting to install bolt complex can be spacing by locating part 4, prevent it to take place to remove to accomplish the disposable installation of two sets of opposite directions bolts smoothly, easy operation has greatly reduced the bolt installation degree of difficulty because of spare part is heavier and coordinate inconvenient bringing each other, has promoted the installation quality of bolt. Meanwhile, the bolt installation tool is detachable in integral structure, convenient to install and operate in a narrow space, and convenient to detach after two groups of bolts are installed.

With continued reference to fig. 1 and 2, the bracket 1 further includes a support portion for connecting the first connection portion 11 and the second connection portion 12. In the present embodiment, the support portion, the first connection portion 11, and the second connection portion 12 are of an integral structure. Further, the thickness of the first connection portion 11 and the thickness of the second connection portion 12 are both greater than the thickness of the support portion to ensure structural strength.

Specifically, as shown in fig. 2 and 5, in the present embodiment, the bracket 1 is U-shaped, and can avoid the installed parts during operation, thereby making full use of space. Alternatively, the bracket 1 may be C-shaped or V-shaped.

As shown in fig. 1 and 2, the stopper 4 includes a first pad 41 and a second pad 42 arranged at intervals. The first cushion block 41 is opposite to the first connecting portion 11, and the first cushion block 41 is used for abutting against a first bushing matched with the first bolt to be installed. The second cushion block 42 is opposite to the second connecting portion 12, and the second cushion block 42 is used for abutting against a second bushing matched with a second bolt to be installed. By changing the distance between the first cushion block 41 and the second cushion block 42, the bolt installation tool can adapt to the installation of two groups of bolts with different installation distances, and the applicability is improved.

Specifically, referring to fig. 2, the end face of the first head block 41 facing the first screw 2 is for abutting against the side face of the first bush facing away from the first bolt to be mounted. The first cushion block 41 is provided with a first avoiding hole 411 in a penetrating mode, the first avoiding hole 411 and the first screw rod 2 are coaxially arranged, and the first avoiding hole 411 can be formed in the rod portion of the first bolt to be installed in a penetrating mode. The first screw rod 2 is rotated, the first bolt to be installed can be driven to linearly move along the axial direction, and the first avoiding hole 411 is used for avoiding the rod portion of the first bolt to be installed. Correspondingly, the end face of the second spacer block 42 facing the second threaded rod 3 serves to bear against the side of the second bushing facing away from the second bolt to be mounted. The second cushion block 42 is provided with a second avoidance hole in a penetrating mode, the second avoidance hole and the first screw rod 2 are coaxially arranged, and the second avoidance hole can be formed in a penetrating mode through the rod portion of the second to-be-mounted bolt. And the second screw rod 3 is rotated to drive the second to-be-mounted bolt to linearly move along the axial direction, and the second avoidance hole is used for avoiding the rod part of the second to-be-mounted bolt.

Referring again specifically to fig. 1-3, the limiter 4 further includes a first top piece 43 and a second top piece 44. The first top block 43 includes a first limiting portion 431 and a first mounting portion 432 that are connected, the first top block 43 further includes a first through hole 433 penetrating through the first limiting portion 431 and the first mounting portion 432, the first through hole 433 is coaxial with the first avoiding hole 411, and the first mounting portion 432 is in threaded connection with the first avoiding hole 411. The end of the first mounting portion 432 protrudes out of the first escape hole 411, and can abut against the first bushing, and the first stopper portion 431 abuts against the end surface of the first pad 41 facing away from the first screw 2. The diameter of the first limiting portion 431 is larger than that of the first mounting portion 432 to perform a limiting function. The end surface of the first mounting part 432 protruding out of the first escape hole 411 is stuck with a rubber gasket to avoid abrasion.

Accordingly, the second top block 44 has the same structure and function as the first top block 43. The second ejector block 44 comprises a second limiting portion and a second mounting portion which are connected, the diameter of the second limiting portion is larger than that of the second mounting portion, the second ejector block 44 further comprises a second through hole penetrating through the second limiting portion and the second mounting portion, the second through hole is coaxial with the second avoidance hole, the second mounting portion is in threaded connection with the second avoidance hole, the end portion of the second mounting portion extends out of the second avoidance hole and can be in butt joint with the second bushing, and the second limiting portion is in butt joint with the end face of the second cushion block 42, which faces away from the second screw 3.

More specifically, as shown in fig. 1 and 3, in this embodiment, the first to-be-installed bolt and the second to-be-installed bolt are two sets of opposite bolts coaxially arranged at the connection position of the wing inner flap cabin box section assembly and the inner flap cabin cover plate assembly, and then the first screw 2, the first avoidance hole 411, the second screw 3 and the second avoidance hole are coaxially arranged.

Alternatively, as shown in fig. 2, 3 and 5, the bracket 1 is provided with a first positioning groove 13 and a second positioning groove 14. The first pad 41 can be inserted into the first positioning groove 13, and the second pad 42 can be inserted into the second positioning groove 14. The first cushion block 41 and the second cushion block 42 are connected with the bracket 1 in a plugging manner, so that the installation and the replacement are convenient.

Preferably, referring to fig. 5 and 6, the groove bottom of the first positioning groove 13 is provided with a first positioning hole 131, and the first cushion block 41 is provided with a first connecting hole 412 at a position corresponding to the first positioning hole 131. The first connecting bolt 45 is sequentially screwed to the first positioning hole 131 and the first connecting hole 412, and the first connecting bolt 45 plays a role in locking the first pad 41. Similarly, the bottom of the second positioning groove 14 is provided with a second positioning hole 141, and the second cushion block 42 is provided with a second connecting hole at a position corresponding to the second positioning hole 141. The second connecting bolt 46 is sequentially screwed to the second positioning hole 141 and the second connecting hole, and the second connecting bolt 46 plays a role in locking the second cushion block 42.

As shown in fig. 1-4, in this embodiment, the bolt installation tool further includes a first adapter sleeve 51 and a second adapter sleeve 52. The first adapter sleeve 51 is connected to the end of the first screw 2, capable of being fitted with the head of a first bolt to be mounted. The second adapter sleeve 52 is connected to the end of the second threaded rod 3 and can be fitted with the head of the second bolt to be mounted.

Specifically, the first screw 2 includes a first stopper 21, a first thread section 22, and a first connector 23, which are sequentially connected. The first threaded section 22 is screwed with the first connection 11 and the first adapter sleeve 51 is movably connected to the first adapter 23. The first adapter sleeve 51 can be pivoted on the first threaded spindle 2 by a certain angle, so that the adaptation of the first adapter sleeve 51 to the screw part to be mounted is improved. Correspondingly, the second screw 3 comprises a second limit head, a second thread section and a second connector which are connected in sequence. The second threaded section is in threaded connection with the second connecting portion 12, and the second adapter sleeve 52 is movably connected to the second connector. The second adapter sleeve 52 can be pivoted on the second threaded spindle 3 by a certain angle, so that the adaptation of the second adapter sleeve 52 to the screw part to be mounted is increased.

Referring still specifically to fig. 4, the first adapter sleeve 51 includes a first adapter 511 and a first adapter 512 connected. The first connecting portion 511 is movably sleeved outside the first connecting head 23, and the first adapting portion 512 can be matched with the head portion of the first bolt to be installed. The first adapting portion 512 is configured according to the head characteristics of the first bolt to be mounted so as to adapt to different bolts to be mounted. The first transferring portion 511 is provided with a first cavity 5111 therein, and the first transferring portion 511 is further provided with a first threaded hole 5112 communicating with the first cavity 5111. The first screw 2 further comprises a first transition section 24 arranged between the first thread section 22 and the first connection head 23, the diameter of the first transition section 24 being smaller than the diameter of the first connection head 23, the first connection head 23 being threadably connectable to the first threaded bore 5112, the first connection head 23 being further extendable into the first cavity 5111. In the installation, the first connector 23 is first screwed into the first threaded hole 5112, and then the first connector 23 is further screwed until the first connector 23 is completely inserted into the first cavity 5111. Because the diameter of the first transition section 24 is smaller than that of the first connecting head 23, when the first connecting head 23 extends into the first cavity 5111, a larger gap exists at the connection position of the first threaded hole 5112 and the first transition section 24, so that the first connecting portion 511 can swing at a certain angle at the end of the first screw rod 2.

Accordingly, the connection structure of the second adapter sleeve 52 and the second screw 3 is the same as the connection structure of the first adapter sleeve 51 and the first screw 2. The second adapter sleeve 52 includes a second adapter portion and a second adapter portion connected. The second adapting part is movably sleeved outside the second connector, and the second adapting part can be matched with the head of the second bolt to be installed. A second cavity is arranged in the second switching part, and a second threaded hole communicated with the second cavity is further formed in the second switching part. The second screw 3 further comprises a second transition section arranged between the second thread section and the second connector, the diameter of the second transition section is smaller than that of the second connector, the second connector can be in threaded connection with the second threaded hole, and the second connector can also extend into the second cavity.

Optionally, with continued reference to fig. 4, the diameter of the first retaining head 21 is greater than the diameter of the first flight 22 to provide a retaining effect on the first screw 2. The first threaded section 22 has a diameter greater than or equal to the diameter of the first connector 23, facilitating the passage of the first connector 23 through a threaded hole in the first connector 11. Likewise, the diameter of the second retaining head is greater than the diameter of the second threaded section, which is greater than or equal to the diameter of the second connector.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Bolt mounting tool, its characterized in that includes:

a bracket (1) having a first connection portion (11) and a second connection portion (12) which are disposed opposite to each other;

the first screw rod (2) is in threaded connection with the first connecting part (11), and the end part of the first screw rod (2) can be matched with the head part of a first bolt to be installed;

the second screw rod (3) is in threaded connection with the second connecting part (12), and the end part of the second screw rod (3) can be matched with the head part of a second bolt to be installed;

and the limiting piece (4) is detachably connected to the bracket (1), and when the first screw (2) and the second screw (3) move towards each other, the limiting piece (4) is used for limiting the movement of the first bushing matched with the first to-be-installed bolt and the movement of the second bushing matched with the second to-be-installed bolt.

2. The bolt installation tool according to claim 1, wherein the limiting piece (4) comprises a first cushion block (41) and a second cushion block (42) which are arranged at intervals, the first cushion block (41) is opposite to the first connecting portion (11), the second cushion block (42) is opposite to the second connecting portion (12), a first positioning groove (13) and a second positioning groove (14) are formed in the support (1), the first cushion block (41) can be inserted into the first positioning groove (13), and the second cushion block (42) can be inserted into the second positioning groove (14).

3. The bolt installation tool according to claim 2, wherein the end face of the first cushion block (41) facing the first screw (2) is used for abutting against the side face of the first bushing, which faces away from the first bolt to be installed, a first avoidance hole (411) is formed in the first cushion block (41) in a penetrating manner, the first avoidance hole (411) and the first screw (2) are coaxially arranged, and the rod part of the first bolt to be installed can penetrate through the first avoidance hole (411);

the second cushion block (42) faces the end face of the second screw (3) and is used for propping against the second bushing to deviate from the side face of the second bolt to be installed, a second avoiding hole is formed in the second cushion block (42) in a penetrating mode, the second avoiding hole is coaxial with the first screw (2), and the rod portion of the second bolt to be installed can penetrate through the second avoiding hole.

4. A bolt installation tool according to claim 3, wherein the limiting piece (4) further comprises a first top block (43), the first top block (43) comprises a first limiting part (431) and a first installation part (432) which are connected, the diameter of the first limiting part (431) is larger than that of the first installation part (432), the first top block (43) further comprises a first through hole (433) penetrating through the first limiting part (431) and the first installation part (432), the first through hole (433) is coaxial with the first avoiding hole (411), the first installation part (432) is in threaded connection with the first avoiding hole (411), the end part of the first installation part (432) extends out of the first avoiding hole (411) and can be abutted with the first bushing, and the first limiting part (431) is abutted with the end face of the first cushion block (41) facing away from the first screw (2);

the limiting piece (4) further comprises a second top block (44), the second top block (44) comprises a second limiting part and a second installation part which are connected, the diameter of the second limiting part is larger than that of the second installation part, the second top block (44) further comprises a second through hole which penetrates through the second limiting part and the second installation part, the second through hole is coaxial with the second avoidance hole, the second installation part is in threaded connection with the second avoidance hole, the end part of the second installation part extends out of the second avoidance hole and can be in butt joint with the second bushing, and the second limiting part is in butt joint with the second cushion block (42) and is away from the end face of the second screw rod (3).

5. The bolt installation tool according to claim 2, wherein a first positioning hole (131) is formed in the bottom of the first positioning groove (13) in a penetrating manner, a first connecting hole (412) is formed in a position, corresponding to the first positioning hole (131), on the first cushion block (41), and a first connecting bolt (45) is sequentially screwed into the first positioning hole (131) and the first connecting hole (412);

the bottom of the second positioning groove (14) is provided with a second positioning hole (141) in a penetrating mode, the position, corresponding to the second positioning hole (141), of the second cushion block (42) is provided with a second connecting hole, and the second connecting bolt (46) is sequentially connected with the second positioning hole (141) and the second connecting hole in a threaded mode.

6. The bolt installation tool according to claim 1, further comprising a first adapter sleeve (51), wherein the first screw (2) comprises a first limit head (21), a first thread section (22) and a first connecting head (23) which are connected in sequence, wherein the first thread section (22) is in threaded connection with the first connecting part (11), and the first adapter sleeve (51) is movably connected to the first connecting head (23) and can be matched with the head of the first bolt to be installed;

the second screw rod (3) comprises a second limiting head, a second thread section and a second connector which are sequentially connected, the second thread section is in threaded connection with the second connecting portion (12), and the second switching sleeve (52) is movably connected to the second connector and can be matched with the head of the second to-be-mounted bolt.

7. The bolt installation tool according to claim 6, wherein the first adapter sleeve (51) comprises a first adapter part (511) and a first adapting part (512) which are connected, the first adapter part (511) is movably sleeved outside the first connector (23), and the first adapting part (512) can be matched with the head of the first bolt to be installed;

the second adapter sleeve (52) comprises a second adapter part and a second adapting part which are connected, the second adapter part is movably sleeved outside the second connector, and the second adapting part can be matched with the head part of the second bolt to be installed.

8. The bolt installation tool according to claim 7, wherein a first cavity (5111) is provided in the first connection portion (511), a first threaded hole (5112) communicating with the first cavity (5111) is further provided in the first connection portion (511), the first screw (2) further comprises a first transition section (24) provided between the first threaded section (22) and the first connection head (23), the diameter of the first transition section (24) is smaller than the diameter of the first connection head (23), the first connection head (23) is in threaded connection with the first threaded hole (5112), and the first connection head (23) can also extend into the first cavity (5111);

the second connecting part is internally provided with a second cavity, the second connecting part is also provided with a second threaded hole communicated with the second cavity, the second screw (3) further comprises a second transition section arranged between the second threaded section and the second connector, the diameter of the second transition section is smaller than that of the second connector, the second connector can be in threaded connection with the second threaded hole, and the second connector can also extend into the second cavity.

9. Bolt installation tool according to claim 6, wherein the diameter of the first limit head (21) is larger than the diameter of the first threaded section (22), the diameter of the first threaded section (22) being not smaller than the diameter of the first connection head (23);

the diameter of the second limiting head is larger than that of the second threaded section, and the diameter of the second threaded section is not smaller than that of the second connector.

10. Bolt installation tool according to any one of claims 1-9, wherein the bracket (1) is U-shaped, C-shaped or V-shaped.