Fastener installation tool, installation kit and installation method

Abstract

The present invention includes a mounting tool (200), a mounting kit and a mounting method for mounting a fastener (12) into a structure (14). The tool comprises: a housing (202); a first sheath (206) disposed along the first axis (102) and movable relative to the housing (202); a second sheath (208) configured to drive the first sheath to translate relative to the housing (202); a first rotating shaft (210); and the first transmission device (212) and the second transmission device (214) are suitable for respectively driving the first sheath (206) and the second sheath (208) to rotate under the action of rotation of the first rotating shaft. The tool comprises a tube body (204), a first sheath and a second sheath both disposed around the tube body (204); the first axis of rotation extends along a second axis (240), a first distance (242) is spaced between the first axis and the second axis, and the first distance is not zero.

Description

Technical Field

[0001] This invention relates to the assembly of blind hole fasteners, applicable to applications where operation can only be performed from one side of the structure, and particularly to a fastener installation tool, installation kit, and installation method. Background Technology

[0002] This invention includes an installation tool for installing fasteners into a structure. The tool includes: a housing having a front opening aligned along a first axis and a rear opening; a first sleeve adjacent to the front end of the housing and rotatable and translatable relative to the housing along the first axis; a second sleeve adjacent to the rear end of the housing and translatable relative to the housing along the first axis; the second sleeve being configured to drive the first sleeve to translate relative to the housing; a first rotating shaft disposed within the housing; a first transmission device disposed within the housing and connected to the first rotating shaft, adapted to drive the first sleeve to rotate when the first rotating shaft rotates in a first direction; and a second transmission device disposed within the housing and connected to the first rotating shaft, adapted to drive the second sleeve to translate when the first rotating shaft rotates in a second direction opposite to the first direction.

[0003] Such installation tools are described in particular in the European patent document EP3539685 under the applicant's name.

[0004] The operating principle of this installation tool requires that the gripping element (separated from the fastener being installed) must be ejected from the front end of the tool when a new fastener is inserted. Therefore, the gripping element already inserted into the tool may obstruct the gripping of new fasteners. Furthermore, the gripping element may accidentally eject, posing a safety hazard to the operator. Summary of the Invention

[0005] To solve the above problems, the applicant developed the above installation tool: the tool includes a tube body disposed inside a housing and extending along a first axis from an open front end to an open rear end; the tube body is covered with a first sheath and a second sheath; a first rotating shaft extends along a second axis, and the first axis and the second axis are spaced apart by a first distance, and the distance is not zero.

[0006] This installation tool allows the fastener gripping element to be ejected through the rear end of the tool or temporarily stored in the tool's storage compartment.

[0007] According to other advantages of the invention, the installation tool has one or more of the following features, which can be used individually or in various technically feasible combinations: The installation tool also includes a second rotating shaft disposed within the housing and extending along a third axis. This third axis is separated from the first and second axes by a second distance and a third distance, respectively, and both distances are not zero. The second rotating shaft is connected to the first rotating shaft and is simultaneously included in the first and second transmission devices.

[0008] The first transmission device includes a first one-way wheel, which is adapted to drive the first sheath to rotate when the first rotating shaft rotates in a first direction; the second transmission device includes a second one-way wheel and a driving element, which is driven to rotate by the second one-way wheel when the first rotating shaft rotates in a second direction, and the driving element cooperates with the second sheath to realize the translation of the second sheath.

[0009] The first and second one-way wheels are arranged along the first axis; the third axis is parallel to the first axis; the second rotation axis extends along the third axis and connects the first end and the second end, and the first end and the second end are respectively connected to the first one-way wheel and the second one-way wheel.

[0010] The installation tool also includes an electric motor housed within the housing, with a first rotating shaft forming the output shaft of the electric motor.

[0011] The tube is fixed relative to the shell.

[0012] The rear end of the housing is provided with a removable receiving cavity, and the open rear end of the tube body leads to the receiving cavity.

[0013] The present invention also includes an installation kit for installing fasteners into a structure, the fastener comprising: a pin extending along a fastening axis with a head; a gripping element projecting axially beyond the head; and a fracture groove disposed between the head and the gripping element, the fracture groove being capable of fracture upon application of a fracture torque along the fastening axis; the installation kit comprising: the aforementioned installation tool; and an installation head comprising: a hollow body mounted on the front end of the housing of the installation tool and extending along a first axis, the front end having a first front opening for receiving the gripping element of the fastener; and a sleeve disposed within the hollow body, capable of being flush with the hollow body. The sleeve has a second front opening at its front end, aligned axially with the first front opening of the hollow body; the rear end of the sleeve is connected to a first sheath in the installation tool, thereby enabling the first sheath to drive the sleeve to translate and rotate; a retaining device is used to fix the gripping element of the fastener in the second front opening of the sleeve; a tubular element extends along the first axis into the interior of the sleeve and has two open ends; the rear end of the tubular element is connected to the front end of the installation tool tube body; the inner diameter of both the installation head tubular element and the installation tool tube body (from the front end of the tubular element to the rear end of the tube body) is greater than or equal to the maximum radial dimension of the fastener gripping element.

[0014] According to other advantages of the invention, the installation kit has one or more of the following features, which can be used individually or in various technically feasible combinations: The front end of the hollow body of the mounting head also includes a lip that surrounds the first front opening and is capable of contacting a surface surrounding the pin head and substantially perpendicular to the fastening axis.

[0015] This type of fastener also includes a sleeve arranged around the pin, the sleeve being equipped with a flange capable of contacting the head of the pin, the flange including a support surface perpendicular to the fastening axis; the lip of the hollow body substantially coincides with the support surface of the sleeve flange.

[0016] The present invention also includes a method for installing fasteners using the above-described mounting kit. The fastener of this type includes: a pin extending along a fastening axis with a head; a gripping element projecting axially beyond the head; and a fracture groove disposed between the head and the gripping element, the fracture groove being capable of fracture upon application of a fracture torque along the fastening axis. The method includes the following steps: inserting a fastener pin into a drilled hole in a structure, the drilled hole leading to an operable surface of the structure, the pin head being disposed on one side of the operable surface; axially pressing the lip of the hollow mounting head against the structure; inserting a fastener gripping element into a first front opening of the hollow body; locking the gripping element in a second front opening of the sleeve by a locking element; rotating the first rotating shaft of the mounting tool for the first time in a second direction to drive the translation of the first and second sheaths via a second transmission device; rotating the first rotating shaft of the mounting tool for the second time in the first direction to drive the rotation of the first sheath via the first transmission device; continuing the second rotation until the fracture groove of the fastener breaks; and then moving the fastener gripping element from the front end of the tubular element of the mounting head to the rear end of the tube of the mounting tool.

[0017] An advantage of the present invention is that the sleeve of the fastener can be inserted into the drilled hole of the structure simultaneously with the pin; when the lip of the hollow body of the mounting head is axially pressed against the structure, the lip contacts the supporting surface of the sleeve flange. Attached Figure Description

[0018] The present invention will be more clearly understood through the following description, which is only a non-limiting example and should be read in conjunction with the accompanying drawings. The drawings include: Figure 1 This is a side view of the installation kit according to one embodiment of the present invention; Figure 2 , Figure 3 yes Figure 1 Partial cross-sectional view of the installation kit; Figure 4 This is a cross-sectional view of the mounting head according to the first embodiment of the present invention. The mounting head belongs to... Figures 1 to 3 The installation kit shown; Figure 5 This is a cross-sectional view of the mounting head according to the second embodiment of the present invention; Figure 6 yes Figure 5 Exploded view of the mounting head; Figure 7 For use Figures 1 to 3 The diagram shows a cross-sectional view of the fasteners installed using the mounting kit. Detailed Implementation

[0019] Figure 1 An installation kit 10 according to one embodiment of the invention is shown. The installation kit 10 is particularly suitable for mounting fasteners 12 (see...) Figure 1 , Figure 4 and Figure 7 Installed into structure 14 (see Figure 4 The installation of Package 10 will be detailed below.

[0020] Fastener 12 (see) Figure 7 In particular, it includes a fastening rod 16. The fastening rod 16 includes a solid rod body 18 extending along the fastening axis 20 and a head 22 disposed at one end of the rod body. In the illustrated embodiment, the solid rod body 18 is cylindrical and the head 22 is countersunk.

[0021] In the illustrated embodiment, the fastening rod 16 is a threaded pin and also includes an externally threaded section 24 aligned with the solid rod body 18 and located on the opposite side of the head 22. In the following description, the fastening rod 16 will be referred to as "pin 16".

[0022] In the illustrated embodiment, the fastener 12 further includes a gripping element 26, a fracture groove 28, and a sleeve 30.

[0023] The gripping element 26 is integrated with the pin 16 and includes a gripping rod 32 and a gripping knob 34.

[0024] The gripping bar 32 extends along the fastening axis 20, starting from the head 22 of the pin 16, and is located on the opposite side of the solid bar 18.

[0025] The gripping knob 34 is located at one end of the gripping lever 32, on the opposite side of the head 22. The gripping knob 34 forms a radial protrusion relative to the gripping lever 32.

[0026] Preferably, the gripping knob 34 includes a first drive surface 36 arranged around the fastening axis 20. The first drive surface 36 is provided, for example, with a spline groove parallel to the fastening axis 20.

[0027] The gripping element 26 has a maximum radial dimension 38 along a direction perpendicular to the fastening axis 20. In particular, the maximum radial dimension 38 corresponds to the radial dimension of the gripping knob 34.

[0028] A fracture groove 28 is provided between the head 22 of the pin 16 and the gripping rod 32. As described below, the fracture groove 28 is capable of fracturing when a fracture torque is applied around the fastening axis 20, thereby separating the pin 16 and the gripping element 26 from each other.

[0029] The sleeve 30 includes: a tubular body 40, a flange 42, and an internally threaded section 44.

[0030] A tubular body 40 is fitted around the solid shaft 18 of the pin 16 along the fastening axis 20. A flange 42 is adjacent to the first end of the tubular body 40 and is intended to contact the pin head 22. In the illustrated embodiment, the inner surface of the flange 42 is frustoconical and substantially complements the countersunk surface of the head 22.

[0031] The flange includes a support surface 46, which is perpendicular to the fastening axis 20 and forms one end of the flange.

[0032] The internal threaded section 44 is adjacent to the second end of the tubular body 40 and is designed to mate with the external threaded section 24 of the threaded pin.

[0033] In the illustrated embodiment, the tubular cylindrical body 40 is provided with a deformable region 48 (see...). Figure 4 ( ), near the internal thread section 44. As described below, this deformable region 48 is used to form a radial flange when fastener 12 is installed.

[0034] For a fastener 12 similar to the one described above, see the applicant’s patent document EP2894356.

[0035] Structure 14 includes a first surface 50 and a second surface 52, which are generally parallel. In the illustrated embodiment, the first surface 50 and the second surface 52 are planar.

[0036] The structure 14 also has a drilled hole 54 that leads to the first surface 50 and the second surface 52. On the first surface 50 side, the drilled hole 54 has a countersunk hole for receiving the flange 42 of the sleeve 30.

[0037] Figure 1 In the illustrated embodiment, the installation kit 10 includes: an installation head 100, an installation tool 200, and an interface device 300 between the installation head 100 and the installation tool 200.

[0038] In the illustrated embodiment, the mounting head 100, the interface device 300, and the tool 200 are assembled together, as will be described later; and they are aligned along the first axis 102. In the following description, the mounting head 100, the mounting tool 200, and the interface device 300 themselves will be described with reference to the first axis 102.

[0039] Mounting head 100 is found in Figure 1and Figures 3 to 4 . Figure 5 and Figure 6 A variant embodiment of the mounting head 400 is shown, which can be used to replace the mounting head 100 in the mounting kit 10.

[0040] Mounting heads 100 and 400 will be described together below. Identical parts will be designated with the same reference numerals. Mounting head 400 is also considered to extend along the first axis 102.

[0041] Mounting heads 100 and 400 include: a hollow body 110 and 410; a sleeve 112 and 412; a retaining device 114 and 414; a first tubular element 115 and 415; and a second tubular element 116 and 416. In the illustrated embodiment, mounting heads 100 and 400 further include a first compression spring 118 and a second driving surface 119 and 419.

[0042] Hollow bodies 110 and 410 extend along a first axis 102, located between a first end and a second end, hereinafter referred to as the "front end" and the "rear end," respectively. In the illustrated embodiment, hollow bodies 110 and 410 have an external radial surface that is substantially cylindrical of revolution.

[0043] The front end of the hollow bodies 110, 410 includes a first front opening 120 for receiving the gripping element 26 of the fastener 12. In the subsequent description of the mounting kit 10, "front" refers to the direction toward the fastener 12 fitted to the mounting head 100.

[0044] In the illustrated embodiment, the front end of the hollow bodies 110 and 410 further includes a front lip 122, arranged around the first front opening 120 and facing outwards from the hollow body. The front lip 122 forms a flat crown-shaped structure with its plane perpendicular to the first axis 102.

[0045] Preferably, the flat crown-shaped structure formed by the front lip 122 substantially coincides with the support surface 46 of the sleeve flange 42 of the fastener 12. In other words, the front lip 122 and the support surface 46 have closely spaced annular surfaces.

[0046] In a variant not shown, the flat crown-shaped structure formed by the anterior lip 122 may be arranged around the support surface 46 of the flange 42. In other words, the outer diameter of the anterior lip 122 is larger than the outer diameter of the support surface 46.

[0047] In the illustrated embodiment, the front end of the hollow bodies 110 and 410 further includes a limiting member 124 and 424, which is arranged around the first front opening 120 and faces the interior of the hollow body.

[0048] The rear end of the hollow bodies 110 and 410 includes a flange 126 that protrudes radially relative to the outer radial surface of the hollow body.

[0049] Sleeves 112 and 412 are disposed inside hollow bodies 110 and 410, extending along the first axis 102 between the front and rear ends. The front end of sleeves 112 and 412 is provided with a second front opening 130, which is aligned along the axis with the first front opening 120 of the hollow body.

[0050] In the illustrated embodiment, the front end of the sleeves 112 and 412 is further provided with an inner cavity 131 and 431 and an inner annular surface 132 and 432.

[0051] The radial dimensions of the inner cavities 131 and 431 are strictly larger than the radial dimension of the second front opening 130. The inner annular surfaces 132 and 432 are arranged around the second front opening 130 and are located axially between the second front opening 130 and the inner cavities 131 and 431.

[0052] In the illustrated embodiment, the inner annular surfaces 132 and 432 are concave frustum-shaped and gradually expand from the second front opening 130 toward the inner cavities 131 and 431.

[0053] The rear end of sleeves 112, 412 includes a connecting element 133, 433 that connects to a component of installation tool 200, as described below. The connecting element 133, 433 includes, for example, threads provided on the inner surface of the sleeve.

[0054] In optional configurations, such as Figure 3-4 In the mounting head 100 shown, the connecting element 133 includes an intermediate ring 134 for compensating for the diameter difference between the sleeve and the mounting tool.

[0055] Sleeves 112 and 412 can translate and rotate relative to hollow bodies 110 and 410, as detailed below.

[0056] The retaining devices 114, 414 are able to lock the gripping element 26 of the fastener 12 in the second front opening 130 of the sleeve 112, 412.

[0057] Preferably, the holding devices 114, 414 include at least two grippers 135, 435, and more preferably, at least three grippers. The grippers 135, 435 are at least partially disposed within the sleeves 112, 412 and are arranged at an angle around the first axis 102. Each gripper has a hook 136 at its front end.

[0058] In the illustrated embodiment, each gripper includes an outer annular surface 138, 438 disposed near the hook portion 136. More specifically, in the illustrated embodiment, each outer annular surface 138, 438 is shaped as a frustum that complements the inner annular surfaces 132, 432 of the sleeves 112, 412.

[0059] Grippers 135 and 435 can be in an unfolded configuration (not shown) and a retracted configuration (not shown). Figure 3-4 and Figure 5-6 The hooks 136 move radially relative to the hollow bodies 110 and 410, with each hook 136 being closer to the first axis 102 in the retracted configuration than in the unfolded configuration.

[0060] The grippers 135 and 435 are locked to prevent rotation relative to the sleeves 112 and 412, which are adapted to drive the grippers to translate and rotate relative to the hollow bodies 110 and 410.

[0061] The grippers 135 and 435 can translate between the front and rear positions within the sleeves 112 and 412.

[0062] When the grippers 135 and 435 are in the forward position, they are held in a retracted configuration by the sleeves 112 and 412. In the illustrated embodiment, when the grippers are in the forward position, their outer annular surfaces 138 and 438 are in contact with the inner annular surfaces 132 and 432 of the sleeve, thereby keeping the grippers in a retracted configuration.

[0063] When the jaws 135 and 435 are in the rear position, the outer annular surfaces 138 and 438 of each jaw maintain an axial distance from the inner annular surfaces 132 and 432 of the sleeve. The jaws are able to move radially away from each other within the inner cavities 131 and 431 of the sleeve.

[0064] The retaining devices 114 and 414 will be described in detail below.

[0065] First tubular elements 115 and 415 extend along the first axis 102 into sleeves 112 and 412, respectively, with the extension section located between the open front end and the open rear end. The front end of the first tubular elements 115 and 415 is provided with a support surface for contacting the inner surfaces of the grippers 135 and 435, details of which will be described later. The first tubular elements 115 and 415 also include a support surface for the first compression spring 118.

[0066] exist Figure 3 and Figure 4 In the example of the mounting head 100 shown, the rear end of the first tubular element 115 has a support surface for receiving one end of the first compression spring 118. In this example, the support surface is formed by a shoulder within the coronal body located at the rear end of the tubular element. Figure 5In the example of the mounting head 400 shown, the support surface is a flange located at the front end of the first tubular element 415. Other implementations of the support surface are also possible.

[0067] The hooks 136 on the grippers 135 and 435 are axially disposed between the first front opening 120 of the hollow bodies 110 and 410 and the front end of the first tubular elements 115 and 415.

[0068] The second tubular elements 116 and 416 extend along the first axis 102 into the first tubular elements 115 and 415, with the extension section located between the open front end and the open rear end. The front end of the second tubular elements 116 and 416 abuts against the inner surface of the first tubular elements 115 and 415 to form a stop.

[0069] The internal radial dimension of the second tubular elements 116 and 416 from the front end to the rear end is greater than or equal to the maximum radial dimension 38 of the gripping element 26 of the fastener 12.

[0070] Preferably, the second tubular elements 116, 416 include a main inner surface 140, which is substantially cylindrical in shape. More preferably, the radial dimension of the main inner surface 140 is strictly larger than the maximum radial dimension 38 of the gripping element 26.

[0071] The second tubular elements 116 and 416 are fixed in the translational direction relative to the sleeves 112 and 412.

[0072] As described below, sleeves 112 and 412 are adapted to drive the first tubular elements 115 and 415 to translate and rotate relative to the hollow bodies 110 and 410. The first tubular elements 115 and 415 relative to sleeves 112 and 412 and the second tubular elements 116 and 416 can also slide freely under the axial thrust of the grippers 135 and 435.

[0073] A first compression spring 118 is radially arranged between the first tubular elements 115, 415 and the sleeves 112, 412. The first compression spring 118 extends along the first axis 102 and connects the two ends.

[0074] exist Figure 3 and Figure 4 In the example of the mounting head 100 shown, both ends abut against the coronal inner shoulder disposed at the rear end of the first tubular element 115 and the washer 142 disposed on a part of the second tubular element 116, respectively.

[0075] exist Figure 5 In the example of the mounting head 400 shown, both ends abut against the flange disposed at the front end of the first tubular element 115 and the collar 442 surrounding a portion of the first tubular element 415 and the second tubular element 416, respectively. The collar 442 and the sleeve 412 are fixedly connected.

[0076] Therefore, the first tubular elements 115 and 415 can translate along the first axis 102 between a front position and a rear position within the sleeves 112 and 412. In the front position, the first tubular element 115 and 415 are closer to the first front opening 120 of the hollow body; at this time, the first compression spring 118 is in a first compressed state. In the rear position, the first tubular element 115 and 415 are farther from the first front opening 120 of the hollow body; at this time, the first compression spring 118 is in a second compressed state, which is more tightly compressed than in the first compressed state.

[0077] The second drive surfaces 119 and 419 can cooperate with the gripping element 26 of the fastener 12 to drive the gripping element to rotate. More specifically, the second drive surfaces 119 and 419 can be assembled with the first drive surface 36 of the gripping knob 34. The second drive surfaces 119 and 419 will be described in detail below.

[0078] Now we will describe it in more detail. Figure 1 and Figure 3-4 The installation head 100.

[0079] The retaining device 114 of the mounting head 100 includes a ring-shaped clamping body 144 disposed within the sleeve 112 and surrounding the first tubular element 115. The rear end of each gripper 135 is fixedly connected to the clamping body 144.

[0080] Each gripper 135 is elastically deformable between a retracted configuration and an extended configuration. In the illustrated embodiment, the holding device 114 includes six elastically deformable grippers 135.

[0081] The clamping body 144 is locked in the sleeve 112 and cannot be rotated. In the illustrated embodiment, the clamping body 144 has a plane 146 and is fitted onto the sleeve by a key 148, which allows the clamping body 144 to slide axially within the sleeve 112.

[0082] The second tubular element 116 is locked in the clamping body 144 and cannot rotate. In the illustrated embodiment, the outer surface of the crown-shaped component of the clamping body 144 has an axially extending groove. This groove has a semi-circular cross-section and accommodates a circular cross-section rod. The rear portion of the clamping body 144 has an axially extending, semi-circular cross-section groove on a portion of its inner surface. The second tubular element 116 is assembled to the clamping body by the rod. The presence of the rod prevents one element from rotating relative to the other.

[0083] Furthermore, in the mounting head 100, the second drive surface 119 is formed from the front end of the first tubular element 115.

[0084] Now we will describe it in more detail. Figure 5-6 The mounting head is 400.

[0085] The retaining device 414 of the mounting head 400 includes a plurality of tongues 446, each tongue being fixedly connected to a corresponding jaw 435. In the illustrated embodiment, the retaining device 414 includes three jaws 435 and three tongues 446.

[0086] In addition, the front end of the sleeve 412 is provided with a plurality of axial slits 448, which are arranged at an angle along the first axis 102. Each tongue 446 is arranged in an axial slit 448 and can slide within the axial slit, with the sliding space located between the front and rear positions of the corresponding jaw 435.

[0087] In addition, the front end of the first tubular element 415 is provided with a front surface 450; the rear end of each gripper is provided with a rear surface 452, which is capable of sliding radially and contacting the front surface 450.

[0088] The front surface 450 forms a non-zero angle with the first axis 102. Preferably, the front surface 450 forms an angle between 0° and 15° with a plane perpendicular to the first axis 102.

[0089] In the illustrated embodiment, the front surface 450 of the first tubular element 415 is in the shape of a truncated cone, while the rear surface 452 of each gripper 435 is in the shape of a concave cone, the outline of which is generally complementary to the front surface 450.

[0090] Furthermore, in the mounting head 400, the second drive surface 419 is formed by the inner surface of the grippers 435 in a retracted configuration. More specifically, each gripper 435 has an inner surface 454 facing the first axis 102, which forms part of the second drive surface 419.

[0091] Now will be on Figure 1 and Figure 2 The installation tool 200 in the installation kit 10 shown is described.

[0092] The installation tool 200 includes: a housing 202, a tube 204, a first sheath 206 and a second sheath 208, a first rotating shaft 210, a first transmission device 212 and a second transmission device 214. In the illustrated embodiment, the installation tool 200 further includes: a second rotating shaft 216, a motor 218, a circuit 219 connected to the motor, and a first switch 220.

[0093] The housing 202 has an open front end 221 aligned along a first axis 102 and a rear end 222. In the illustrated embodiment, the housing rear end 222 includes a removable receiving cavity 223 arranged along the first axis 102.

[0094] Furthermore, in the illustrated embodiment, the housing 202 includes: a main cavity 224 through which the tube 204 extends; and a handle 225. The handle 225 can be gripped by an operator.

[0095] A tube 204 is disposed within a housing 202 and extends along a first axis 102 between an open front end 226 and an open rear end 228. The front end 226 of the tube 204 projects axially beyond the front end 221 of the housing 202. The rear end 228 of the tube 204 is situated within the housing 202. In the illustrated embodiment, the rear end 228 of the tube 204 opens into a receiving cavity 223.

[0096] In the illustrated embodiment, the tube 204 is fixed relative to the housing 202.

[0097] The internal radial dimension of the tube body 204 from the front end 226 to the rear end 228 is greater than or equal to the maximum radial dimension 38 of the gripping element 26 of the fastener 12. Preferably, the internal radial dimension of the tube body 204 along the first axis 102 remains substantially constant. This internal radial dimension is substantially equal to the radial dimension of the main inner surface 140 of the second tubular elements 116, 416 in the aforementioned mounting heads 100, 400.

[0098] The first sheath 206 is located inside the housing 202 and extends along the first axis 102 between the front end 230 and the rear end 232. The first sheath 206 is arranged around the tube body 204.

[0099] The first sheath 206 is located near the front end 221 of the housing 202. More specifically, the front end 230 of the first sheath 206 protrudes axially beyond the front end 221 of the housing 202 and the front end 226 of the tube 204.

[0100] In the mounting kit 10, the front end 230 of the first sheath 206 is secured to the rear end of the sleeve 112 of the mounting head 100 by a connecting element 133.

[0101] Furthermore, in the mounting kit 10, the front end 230 of the first sheath 206 is arranged around the rear end of the second tubular element 116 of the aforementioned mounting head 100 so that the second tubular element 116 is in communication with the tube body 204 along the first axis 102.

[0102] As detailed below, the first sheath 206 can rotate and translate relative to the housing 202 along the first axis 102.

[0103] The second sheath 208 is located inside the housing 202 and extends along the first axis 102 between the front end 234 and the rear end 236. The second sheath 208 is arranged around the tube body 204.

[0104] The second sheath 208 is closer to the rear end 222 of the housing 202 than the first sheath 206. More specifically, the front end 234 of the second sheath 208 is connected to the rear end 232 of the first sheath 206.

[0105] As detailed below, the second sheath 208 is configured to drive the first sheath 206 to translate relative to the housing along the first axis 102.

[0106] A first rotation axis 210 is disposed within the housing 202 and extends along a second axis 240. A first distance 242, which is not zero, is separated between the first axis 102 and the second axis 240. In the illustrated embodiment, the first axis 102 and the second axis 240 are parallel to each other.

[0107] In the illustrated embodiment, the first rotating shaft 210 is disposed within the main cavity 224 of the housing.

[0108] The first transmission device 212 is disposed inside the housing 202 and connected to the first rotating shaft 210. As detailed below, the first transmission device 212 is adapted to drive the first sheath 206 to rotate under the action of the first rotating shaft 210 rotating in a first direction.

[0109] The second transmission device 214 is disposed inside the housing 202 and connected to the first rotating shaft 210. As detailed below, the second transmission device 214 is adapted to drive the second sheath 208 to translate under the action of the first rotating shaft 210 rotating in a second direction opposite to the first direction.

[0110] The second rotation axis 216 is disposed within the housing 202 and extends along a third axis 244 between the front end 246 and the rear end 248. This third axis is separated from the first axis 102 and the second axis 230 by a second distance 250 and a third distance 252, respectively, and both distances are not zero. Preferably, the third axis 244 is parallel to the first axis 102. In the illustrated embodiment, the third axis 244 is parallel to both the first axis 102 and the second axis 240.

[0111] In the illustrated embodiment, the second rotating shaft 216 is disposed within the main cavity 224 of the housing.

[0112] The first transmission device 212 includes a first gear train 254, a bearing 217, and a first one-way wheel 256.

[0113] The first rotating shaft 210 and the second rotating shaft 216 are connected by the first gear train 254, so that no matter which direction the first rotating shaft 210 rotates, it will drive the second rotating shaft 216 to rotate in the corresponding direction.

[0114] The front end 246 of the second rotating shaft 216 is connected to a bearing 217, which may be, for example, a roller bearing. More specifically, the bearing 217 connects the second rotating shaft 216 to a first one-way wheel 256 disposed on the first sheath 206.

[0115] The first one-way wheel 256 is adapted to drive the first sheath 206 to rotate under the action of the first rotating shaft 210 rotating in the first direction via the first transmission device 212. When the first rotating shaft 210 rotates in the second direction, the first one-way wheel 256 will not drive the first sheath 206 to rotate.

[0116] Furthermore, the second transmission device 214 includes: a first gear train 254, a second gear train 255, a hollow shaft 257, a second one-way wheel 260; and a drive element 262, which is driven to rotate by the second one-way wheel under the rotation of the first rotating shaft 210 in a second direction. The drive element 262 cooperates with the second sheath 208 to cause the second sheath to translate along the first axis.

[0117] The second gear train 255 connects the second rotating shaft 216 to the hollow shaft 257. The hollow shaft 257 is located at the rear of the tube body 204. The second one-way wheel 260 is arranged along the first axis 102 and is located between the hollow shaft 257 and the rear end of the drive element 262. When the first rotating shaft 210 rotates in the first direction, the second one-way wheel 260 does not drive the drive element 262 to rotate.

[0118] In the illustrated embodiment, the drive element 262 is a ball screw. In other embodiments not shown, the drive element 262 may be a threaded pin, a roller screw, or a worm gear.

[0119] The electric motor 218 is an electric motor located within the housing 202, preferably installed in the main cavity 224. In the illustrated embodiment, the first rotating shaft 210 constitutes the output shaft of the electric motor.

[0120] Circuit 219 is connected to motor 218. In the illustrated embodiment, installation tool 200 includes an electronic module 264 that at least partially constitutes circuit 219.

[0121] The first switch 220 is disposed inside the housing 202 and integrated into the circuit 219. The first switch 220 is mechanically available in an open state (e.g., ...). Figure 2 (As shown) Switching between the open and closed states. When the first switch 220 is in the open state, the circuit 219 is cut off.

[0122] Preferably, the first switch 220 includes an elastic sheet 265, which keeps the first switch in the open state when at rest. Applying pressure to the elastic sheet can close the first switch.

[0123] In the illustrated embodiment, the installation tool 200 also includes a power supply 266 for the electric motor, which is connected to the circuit 219. The power supply may be, for example, a battery 266 connected to the housing 202. Preferably, the battery 266 is detachably attached to the handle 225, located opposite the main cavity 224. Therefore, the battery 266 acts as a counterweight to the main cavity, improving the ergonomics of the installation tool 200.

[0124] In addition, in the illustrated embodiment, the installation tool 200 also includes a second switch (not shown) and a trigger 268.

[0125] The second switch is integrated into circuit 219 and can be switched between an open and closed state. When the second switch is in the open state, circuit 219 is disconnected.

[0126] The trigger 268 is mounted on the handle 225 of the housing 202. Preferably, when the operator presses the trigger, the second switch is in the closed state; when the trigger is not pressed, the second switch is in the open state.

[0127] Preferably, when both the first switch 220 and the second switch are closed, the circuit 219 is closed, enabling the battery 266 to supply power to the motor 218.

[0128] The following will be about Figure 1 and Figure 3 The interface device 300 of the installation kit 10 shown will be described.

[0129] The interface device 300 includes: an interface body 302, an assembly ring 304, at least one second compression spring 306, and a contact rod 308. Preferably, as described below, the interface device 300 further includes a pressure sensor (not shown).

[0130] The interface body 302 has a ring structure and extends along the first axis 102 between the front end and the back end.

[0131] The front end of the interface body 302 is provided with a front face 312, which has a crown-shaped structure and is perpendicular to the first axis 102.

[0132] The front end of the interface body 302 is also provided with at least one spring seat 314, the opening of which faces the front 312. Preferably, the front end of the interface body 302 is provided with a plurality of spring seats 314, which are distributed angularly around the first axis 102.

[0133] The interface body 302 is also provided with a through hole 316, which is parallel to the first axis 102. One end of the through hole 316 opens towards the front 312, and the other end opens towards the rear end of the interface body 302.

[0134] The assembly ring 304 has a ring-shaped structure and extends along the first axis 102 between the front and rear ends. The assembly ring 304 is provided with an inner shoulder 318 facing the rear end of the assembly ring.

[0135] The rear end of the assembly ring 304 is connected to the front end of the interface body 302, for example, by means of a threaded / tapping system. The assembly ring 304 thus forms an inner cavity 320, the boundary of which is defined along the first axis 102 by an inner shoulder 318 and the front face 312 of the interface body 302.

[0136] At least one second compression spring 306 is fixed to the interface body 302 and protrudes axially beyond the front face 312. In the illustrated embodiment, the rear end of the second compression spring 306 is inserted into a spring seat 314; if there are multiple spring seats 314, one of them is inserted.

[0137] In the first compressed state, the front end of the second compression spring 306 is located inside the inner cavity 320 and protrudes axially beyond the front surface 312 of the interface body 302. In the second compressed state, the second compression spring 306 is compressed more tightly than in the first compressed state. The front end of the second compression spring is located inside the spring seat 314 and is flush with the front surface 312 of the interface body.

[0138] Preferably, the interface device 300 includes a plurality of second compression springs 306, the rear end of each of the second compression springs being inserted into a spring seat 314.

[0139] The contact rod 308 extends between its front and rear ends in a direction parallel to the first axis 102. The contact rod 308 is disposed within the through hole 316 of the interface body 302 and is axially slidable along the through hole.

[0140] Preferably, the front end of the contact rod 308 is provided with a forward-opening threaded hole for installing a threaded pin 310, so that the flush stroke of the contact rod can be manually adjusted according to the stiffness of the compression spring.

[0141] As described below, the rear end of the contact rod 308 can drive the first switch 220 of the installation tool 200. In the illustrated embodiment, the rear end of the contact rod 308 is provided with a drive arm 324, which is disposed within the housing 202 of the installation tool.

[0142] In addition, the interface device 300 also includes a third compression spring 326 extending in a direction parallel to the first axis 102. The front end of the third compression spring 326 is connected to the rear end of the contact rod 308. The rear end of the third compression spring 326 is supported or fixed to the housing 202 of the installation tool 200.

[0143] Threaded pin 310 is optional and is installed within cavity 322 of contact rod 308. Preferably, as shown... Figure 3 As shown, the threaded pin 310 is fitted into the cavity 322, with the front end of the pin slightly protruding from the front end of the contact rod 308.

[0144] Preferably, the interface body 302 includes at least one strain gauge, and more preferably at least three strain gauges, to form a pressure sensor. The pressure sensor is connected to the electronic module 264 of the mounting tool 200. When the front lip 122 of the mounting head 100 presses against the flange 42 of the sleeve in the insertion hole 54 of the structure, the pin 16 is subjected to tensile force. The pressure sensor measures the tensile force on the pin 16 by measuring the compressive force between the structure 14 and the housing 202 of the mounting tool.

[0145] exist Figure 3 In the first configuration of the mounting kit 10 shown, the flange 126 of the hollow body 110 of the mounting head 100 contacts the inner shoulder 318 of the mounting ring 304; each of the second compression springs 306 is in a first compression state; the front end of the threaded pin 310 or contact rod 308 protrudes axially beyond the front face 312 of the interface body; and the first switch 220 is in the open state.

[0146] In the second configuration (not shown) of the mounting kit 10, the flange 126 of the hollow mounting head contacts the front face 312 of the interface body; the front end of the threaded pin 310 or contact rod 308 contacts the flange 126 and is approximately coplanar with the front face 312; each of the second compression springs 306 is in a second compression state, which is more compressed than the first compression state; and the first switch 220 is in the closed state.

[0147] More specifically, in the first configuration of the mounting kit 10, the third compression spring 326 is in a first compression state; the drive arm 324 of the contact rod 308 maintains a certain distance from the first switch 220 along the first axis 102; in the second configuration of the mounting kit 10, the third compression spring 326 is in a second compression state, which is more compressed than the first compression state; the drive arm 324 of the contact rod 308 presses against the first switch 220, thereby keeping the first switch closed.

[0148] In a variant embodiment of the mounting kit (not shown), the mounting kit does not include the interface device 300; the mounting heads 100, 400 are connected to the mounting tool 200 via an interface nut 500, as shown. Figure 5 As shown. The flange 126 of the hollow body 110, 410 of the mounting head 100, 400 is axially fixed relative to the front end 221 of the housing 202 of the mounting tool.

[0149] This variant of the installation kit includes an interface nut 500, in which the first switch 220 of the installation tool 200 remains permanently closed.

[0150] The method of installing fastener 12 onto structure 14 using mounting kit 10 is now described.

[0151] The installation method specifically includes: first, installation in place; second, driving operation; and third, disassembly and removal.

[0152] For example, the first step of installation can be performed as follows: First, fastener 12 is inserted into drilled hole 54 in structure 14. More precisely, as Figure 4 As shown, the tubular body 40 of the sleeve 30 (containing the pin 16) is inserted into the drill hole 54. The head 22 of the pin 16 and the flange 42 of the sleeve 30 are thus arranged on the first surface 50 side; the deformable region 48 of the tubular body 40 of the sleeve appears on the second surface 52 side.

[0153] The operator then brings the mounting kit 10 close to the gripping element 26 of the fastener 12. The operator presses the trigger 268, thereby closing the second switch of the mounting tool 200; and inserts the gripping knob 34 into the first front opening 120 of the mounting heads 100, 400. The operator positions the mounting kit 10 so that the first axis 102 is aligned with the fastening axis 20.

[0154] At this time, the mounting kit 10 is in the first configuration state described above. In other words, the flange 126 of the mounting heads 100, 400 is in contact with the inner shoulder 318 of the fastening ring 304; and the first switch 220 is in the open state, thereby cutting off the power supply to the motor 218 in the mounting tool 200.

[0155] Subsequently, the operator applies a pushing force toward the structure 14 to the mounting kit 10 along the first axis 102. The gripping knob 34 contacts the hook 136 of the grippers 135, 435 in the retracted configuration.

[0156] As the axial thrust continues, the first compression spring 118 is compressed, and the grippers 135, 435 and tubular elements 116, 416 move from the front position to the rear position. With the gripping knob 34 in contact with the hook 136, the grippers 135, 435 are radially moved from the retracted configuration to the extended configuration. In the first embodiment of the mounting head 100, the grippers 135 elastically deform around the clamping body 144. In the second embodiment of the mounting head 400, the rear surface 452 of each gripper 435 slides radially against the front surface of the first tubular element 115.

[0157] As the axial thrust continues, the hook portion 136 of the gripper passes over the gripping knob 34 and engages with the gripping rod 32. The grippers 135 and 435 then return to their retracted configuration. Simultaneously, the first compression spring 118 is released, and the grippers 135 and 435 and the first tubular elements 115 and 415 move from the rear position to the front position; and the second drive surfaces 119 and 419 of the mounting heads 100 and 400 assemble with the first drive surface 36 of the fastener.

[0158] Thus, the gripping element 26 of the fastener 12 is locked in the sleeve 112, 412 by the retaining devices 114, 414 of the mounting heads 100, 400.

[0159] As the axial thrust continues to be applied, the front lip 122 of the mounting heads 100 and 400 contacts the support surface 46 of the flange 42 of the sleeve 30. The hollow bodies 110 and 410 of the mounting heads 100 and 400 move rearward relative to the mounting tool 200.

[0160] During the backward movement of the hollow bodies 110 and 410, the rear limiting members 124 and 424 of the hollow bodies come into contact with the hooks 136 of the grippers 135 and 435.

[0161] Furthermore, the rearward movement of the hollow bodies 110 and 410 causes the mounting kit 10 to move from the first configuration to the second configuration. In other words, the flange 126 of the hollow bodies 110 and 410 moves rearward into the inner cavity 320 of the clamping ring 304, thereby pushing back the contact rod 308. The drive arm of the contact rod 308 puts the first switch 220 in the closed position, thereby powering the motor 218 of the mounting tool 200.

[0162] At this point, the first step of installation is complete. According to a variant embodiment, the gripping element 26 of the fastener is locked by the retaining devices 114, 414 of the assembly heads 100, 400, and this locking operation is completed before the fastener 12 is inserted into the drilled hole of the structure 14.

[0163] For example, the second step of the drive operation can be performed as follows: Tool 200 initiates the drive process. This process can be executed, for example, by a program stored in electronic module 264. In particular, electronic module 264 is capable of processing signals from pressure sensors to determine the magnitude of the tension; when the tension reaches a preset target value, it controls the first rotating shaft 210 to stop rotating in the second direction, and then controls the first rotating shaft 210 to rotate in the first direction.

[0164] In the first stage of the drive process, the first rotating shaft 210 of the installation tool 200 rotates in the second direction. As a result, the second sheath 208 of the tool 200 is translated backward by the second transmission device 214.

[0165] The second sheath 208 drives the first sheath 206 to move backward while maintaining the axial thrust of the mounting heads 100 and 400 toward the structure 14. The pin 16 of the fastener 12 is thus pulled backward, while the sleeve 30 remains in place through the contact between the front lip 122 and the support surface 46.

[0166] The tension on the pin 16 causes the deformable region 48 of the sleeve 30 to form a radial convex edge on the second surface 52 of the structure 14, as described in document EP2894356.

[0167] In the second stage of the drive process, the motor stops rotating in the second direction; then, the first rotating shaft 210 of the installation tool 200 begins to rotate in the first direction. Therefore, the first sheath 206 of the installation tool 200 is driven to rotate via the first transmission device 212.

[0168] Therefore, the external thread section 24 of the pin 16 is screwed into the internal thread section 44 of the sleeve 30 until the head 22 contacts the flange 42 of the sleeve.

[0169] The first sheath 206 continues to rotate until the torque applied to the gripping element 26 causes the fracture groove 28 to break. Upon fracture, the electronic module 264 controls the motor to stop rotating. This completes the second step of the drive operation. Optionally, during the second step of the drive operation, the pressure sensor measures the compressive force between the hollow mounting head bodies 110, 410 and the interface body 302.

[0170] For example, the third step of disassembly and removal can be carried out as follows: After the fastener 12 breaks at the fracture groove 28, the operator stops applying axial force to the mounting kit 10 toward the structure 14. After separating from the structure 14, the mounting kit 10 changes from the second configuration to the first configuration. Therefore, even if the operator presses the trigger 268, the motor 218 cannot be started unexpectedly.

[0171] The pin 16 and sleeve 30 remain fixed to the structure 14, while the gripping element 26, which is separated from the pin 16, remains in the mounting heads 100 and 400.

[0172] Next, the operator flips the mounting heads 100 and 400 upwards. As a result, the gripping element 26 moves under gravity along the first axis 102, sliding from the front end of the tubular elements 116 and 416 of the mounting heads 100 and 400 to the rear end 228 of the mounting tool tube 204. The gripping element 26 is thus stored in the removable receiving cavity 223, preventing it from being accidentally ejected by the mounting tool 200.

[0173] In a variant embodiment, the gripping element 26 is inserted into the tube 204 of the installation tool 200 by inserting a new fastener 12 into the mounting heads 100, 400.

[0174] According to the modified embodiment of the mounting kit including the interface nut 500 described above, only the second switch of the mounting tool 200 can open and close the circuit 219. Therefore, the starting of the motor 218 depends only on the operator's operation of the trigger 268, and not on the axial pressure of the mounting kit on the structure 14. The aforementioned mounting kit 10, especially the mounting tool 200, allows the gripping element 26 of the fastener 12 to be ejected from the rear of the mounting kit 10 after breakage. Therefore, it is more convenient to insert a new gripping element into the mounting head.

[0175] In addition, the mounting kit 10 allows the gripping element 26 to be temporarily stored in the receiving cavity 223, thereby preventing the gripping element from accidentally popping out and posing a danger to the operator.

[0176] In addition, the electric motor 218 and the battery 266, which may be present, are arranged away from the first axis 102 to improve the ergonomics of the mounting kit 10 by distributing the weight, making it easier for the operator to hold.

Claims

1. An installation tool (200) for installing a fastener (12) into a structure (14), comprising: The housing (202) has an open front end (221) and a rear end (222) aligned along the first axis (102). The first sheath (206), located near the front end (221) of the housing (202), is capable of rotating and translating relative to the housing (202) along the first axis (102); The second sheath (208), located near the rear end (222) of the housing (202), is capable of translating relative to the housing (202) along the first axis (102); the configuration of the second sheath (208) enables the second sheath (208) to drive the first sheath (206) to translate relative to the housing (202); The first rotating shaft (210) is located inside the housing (202); The first transmission device (212) is disposed inside the housing (202) and connected to the first rotating shaft (210), and is adapted to drive the first sheath (206) to rotate when the first rotating shaft (210) rotates in the first direction; The second transmission device (214) is disposed inside the housing (202) and connected to the first rotating shaft (210), and is adapted to drive the second sheath (208) to translate when the first rotating shaft (210) rotates in a second direction opposite to the first direction; Its features are: The installation tool (200) includes a tube (204) disposed within the housing (202) and extending along the first axis (102) between an open front end (226) and an open rear end (228); a first sheath (206) and a second sheath (208) are each arranged around the tube (204); The first rotation axis (210) extends along the second axis (240), and the first axis (102) and the second axis (240) are separated by a first distance (242), and the first distance is not zero.

2. The installation tool (200) according to claim 1 further includes a second rotating shaft (216) disposed within the housing (202) and extending along a third axis (244), the third axis (244) being separated from the first axis (102) and the second axis (240) by a second distance (250) and a third distance (252) respectively, and both the second distance and the third distance are not zero, the second rotating shaft (216) being connected to the first rotating shaft (210) and simultaneously included in the first transmission device (212) and the second transmission device (214).

3. The installation tool (200) according to claim 2, wherein: The first transmission device (212) includes a first one-way wheel (256), which is adapted to drive the first sheath (206) to rotate under the action of the first rotating shaft (210) rotating in the first direction; The second transmission device (214) includes: a second one-way wheel (260); and a drive element (262) that is driven to rotate by the second one-way wheel (260) when the first rotating shaft (210) rotates in the second direction. The drive element (262) cooperates with the second sheath (208) to cause the second sheath (208) to translate.

4. The installation tool (200) according to claim 3, wherein: The first one-way wheel (256) and the second one-way wheel (260) are arranged along the first axis (102); the third axis (244) is parallel to the first axis (102); the second rotating shaft (216) extends along the third axis (244) and connects the first end (246) and the second end (248), and the first end (246) and the second end (248) are respectively connected to the first one-way wheel (256) and the second one-way wheel (260).

5. The installation tool (200) according to any one of the preceding claims further includes an electric motor (218) disposed within the housing (202), wherein the first rotating shaft (210) forms the output shaft of the electric motor.

6. The installation tool (200) according to any one of the preceding claims, wherein, The tube (204) is fixed relative to the shell (202).

7. The installation tool (200) according to any one of the preceding claims, wherein, The rear end (222) of the housing (202) includes a removable receiving cavity (223), and the rear end (228) of the tube (204) opens into the receiving cavity (223).

8. An installation kit (10) for mounting a fastener (12) into a structure (14), the fastener (12) comprising: A pin (16) extending along the fastening axis (20) and having a head (22); a gripping element (26) protruding axially beyond the head (22); and a fracture groove (28) disposed between the head (22) and the gripping element (26), the fracture groove (28) being capable of fracture when a fracture torque is applied along the fastening axis (20); The installation kit (10) includes: an installation tool (200) as described in any of the preceding claims; and an installation head (100) comprising: A hollow body (110) is mounted on the front end (221) of the housing (202) of the installation tool (200) and extends along the first axis (102). The front end of the hollow body (110) is provided with a first front opening (120) for accommodating the gripping element (26) of the fastener (12). A sleeve (112) is disposed in the hollow body (110) and is capable of translation and rotation relative to the hollow body (110). The front end of the sleeve (112) includes a second front opening (130) that is axially flush with the first front opening (120) of the hollow body (110). The rear end of the sleeve (112) is connected to the first sheath (206) of the installation tool (200), so that the first sheath (206) can drive the sleeve (112) to translate and rotate. The retaining device (114) is capable of locking the gripping element (26) of the fastener (12) in the second front opening (130) of the sleeve (112); A tubular element (115, 116, 415, 416) extends along the first axis (102) into the interior of the sleeve (112), between an open front end and an open rear end; the rear end of the tubular element is connected to the front end (226) of the tube body (204) of the installation tool (200); the inner diameter of the tubular element of the mounting head (100) and the tube body (204) of the installation tool (200) from the front end of the tubular element to the rear end (228) of the tube body (204) is greater than or equal to the maximum radial dimension (38) of the gripping element (26) of the fastener (12).

9. The installation kit (10) according to claim 8, wherein: The front end of the hollow body (110) of the mounting head (100) also includes a lip (122) disposed around the first front opening (120) and capable of contacting the surface (46) of the head (22) substantially perpendicular to the fastening axis (20) and surrounding the pin (16).

10. The mounting kit (10) according to claim 9, wherein the fastener (12) further comprises a sleeve (30) arranged around the pin (16), the sleeve (30) being provided with a flange (42) capable of contacting the head (22) of the pin (16), the flange (42) including a support surface (46) perpendicular to the fastening axis (20). in, The lip (122) of the hollow body (110) substantially coincides with the support surface (46) of the flange (42) of the sleeve (30).

11. A method for installing a fastener (12) using the mounting kit (10) of claim 10, the method comprising the steps of: Insert the pin (16) of the fastener (12) into the drill hole (54) of the structure (14), the drill hole (54) leading to the operable surface (50) of the structure (14), the head (22) being located on one side of the operable surface (50); press the lip (122) of the hollow body (110) of the mounting head (100) axially against the structure (14); insert the gripping element (26) of the fastener (12) into the first front opening (120) of the hollow body (110); lock the gripping element (26) in the second front opening (130) of the sleeve (112) by a locking element; The first rotating shaft (210) of the installation tool (200) is rotated for the first time along the second direction so as to drive the first sheath (206) and the second sheath (208) to translate via the second transmission device (214); The first rotating shaft (210) of the installation tool (200) is rotated a second time along the first direction, thereby driving the first sheath (206) to rotate via the first transmission device (212); this second rotation continues until the fracture groove (28) of the fastener (12) breaks; The gripping element (26) of the fastener (12) is moved from the front end of the tubular element (116) of the mounting head (100) to the rear end (228) of the tube body (204) of the mounting tool (200).

12. The method according to claim 11, wherein: The sleeve (30) of the fastener (12) and the pin (16) are simultaneously inserted into the drill hole (54) of the structure (14); and when the lip (122) of the hollow body (110) of the mounting head (100) is pressed against the structure (14) axially, the lip (122) contacts the support surface (46) of the flange (42) of the sleeve (30).

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