CN114179016A - Fastening device for internal angle spiral fastener - Google Patents

Abstract

The invention provides a fastening device for an internal angle spiral fastener, which comprises an adjusting head and a power piece; the adjusting head is provided with a through adjusting hole which is arranged along the axial direction, and the adjusting hole is provided with a threaded part with the diameter gradually reduced from the first end to the second end of the adjusting head; the adjusting head is composed of a plurality of radial positioning pieces, the radial positioning pieces are circumferentially arranged around the axis of the adjusting head, the outer side surface of each positioning piece is provided with an inner angle abutting surface, and the inner side surface forms a curved surface structure forming the adjusting hole; the power part is provided with a locking head, the diameter of the locking head is gradually reduced from a first end to a second end, the outer side wall of the locking head is provided with external threads, and the locking head and the threaded part can form matching. By rotating the power part, the radial positioning parts forming the adjusting head can be driven to move outwards, so that the adjusting head is matched with inner-angle spiral fasteners such as inner hexagon bolts of various specifications and the like, and a large number of wrenches are not needed.

Description

Fastening device for internal angle spiral fastener

Technical Field

The invention relates to the technical field of mechanical part installation, in particular to a fastening device for an internal angle spiral fastener.

Background

The inner angle screw fastener, i.e. a fastening connection object with an inner angle interface, is usually rotated around an axis by applying force to the inner angle interface part in the installation process, and is connected with other objects by utilizing threads of the inner angle interface part, common objects of the type include inner hexagon bolts, inner pentagon bolts, inner quadrangle bolts and the like, and the outer angle fastener opposite to the inner hexagon bolt is rotated by applying force from the peripheral part, such as a common hexagon nut. When the socket head cap is installed, the end part of an inner hexagon wrench with a regular hexagon section is usually inserted into the groove, the end part and the groove form clamping fit, then, force is applied to the inner hexagon wrench, the inner hexagon wrench drives the inner hexagon bolt to rotate around a shaft, and therefore rotary installation is achieved.

Present hexagon socket head cap spanner many forms the suit with hexagon socket head cap screw, and the commonality is poor, because the interior angle interface specification of the hexagon socket head cap screw of different models differs, make the bolt of a model all need correspond the spanner of a specific model, when the bolt of multiple specification is installed to needs, then need use the spanner of different models respectively, because the process of changing the spanner wastes time and energy, the efficiency of construction can seriously descend, and the spanner of a large amount of different models is comparatively inconvenient when carrying, also loses easily. The patent document with the application number of CN201711049772.4 provides a flexible monkey spanner of interior hexagonal, and this flexible monkey spanner of interior hexagonal establishes the hexagonal of multiple different models connects the cover in proper order, establishes the hexagonal of minor bore joint cover in the hexagonal of heavy-calibre connects, will correspond the hexagonal of specification and connect to stretch out and use according to actual need to solve the poor shortcoming of general interior hexagonal spanner commonality. Although the invention patent improves the universality of the inner hexagonal wrench to a certain extent, the defects still exist, and the technical scheme for solving the problems is that a plurality of hexagonal joints are arranged, the inner hexagonal bolt needing to be installed must correspond to one of the plurality of hexagonal joints, otherwise, the construction cannot be carried out. Therefore, the application range of the wrench corresponds to the number of the arranged hexagonal joints, when the number of the arranged hexagonal joints is too small, the better universality cannot be achieved, and when the number of the hexagonal joints is too large, the wrench structure becomes complicated and heavy.

Disclosure of Invention

In order to solve the problems, the invention provides a fastening device for an inner angle spiral fastener, which can freely adjust the caliber size of an inner angle joint within a certain range, instead of simply combining various types of hexagonal joints as shown in the prior art, thereby greatly improving the universality of the fastening device and the construction efficiency when the fastener is installed.

In order to achieve the purpose, the invention adopts the following technical scheme.

A fastening device for an internal angle helical fastener comprises an adjusting head and a power piece; the adjusting head is provided with a through adjusting hole which is arranged along the axial direction, and the adjusting hole is provided with a threaded part with the diameter gradually reduced from the first end to the second end of the adjusting head; the adjusting head is composed of a plurality of radial positioning pieces, the radial positioning pieces are circumferentially arranged around the axis of the adjusting head, the outer side surface of each positioning piece is provided with an inner angle abutting surface, and the inner side surface forms a curved surface structure forming the adjusting hole; the power part is provided with a locking head, the diameter of the locking head is gradually reduced from a first end to a second end, the outer side wall of the locking head is provided with external threads, and the locking head and the threaded part can form matching.

The invention realizes the effect of freely adjusting the caliber size of the inner angle joint mainly through the adjusting head which can extend and expand outwards. The adjusting head is composed of a plurality of uniformly distributed radial positioning pieces, specifically, when the adjusting head is of a hexagonal structure, the adjusting head is assembled by six uniformly distributed radial positioning pieces, when the adjusting head is of a pentagonal structure, the adjusting head is composed of five uniformly distributed radial positioning pieces, and so on. A plurality of radial setting elements use petal column structure to arrange around the central axis circumference of adjusting the head, and the lateral surface of each radial setting element has one and is used for forming butt complex interior angle butt face with one of them side of the interior angle interface of fastener, and interior hexagon bolt is taken as an example, and interior angle interface of interior hexagon bolt has six sides, then constitutes six radial setting elements of adjusting the head and form the butt with one of them side respectively to form the cooperation structure of adjusting head and interior angle interface. When facing the inner angle interfaces with different calibers, the adjusting head is composed of six independent radial positioning pieces, and the radial positioning pieces can extend and move towards the direction far away from the central axis, so that the size of the outline of the adjusting head is changed, and the adjusting head is finally matched with the inner angle interfaces. In particular, the extension movement of the radial positioning element is effected by the power element. The middle part of the adjusting head is provided with an adjusting hole along the axial direction, the adjusting hole is provided with a threaded part with a gradually reduced diameter and an internal thread, the power part is provided with a locking head with a gradually reduced diameter and an external thread, after the locking head is matched with the adjusting hole, the locking head is rotated, the locking head provides radial pressure towards the peripheral outer side for the adjusting head, and under the action of the radial pressure, the radial positioning piece is far away from the central axis of the adjusting head and gradually disperses, so that the external outline size of the adjusting head is increased, and the adjusting head is matched with the internal angle interface; after the locking head is matched with the inner angle interface, the inner angle spiral fastener can be driven to rotate by continuously rotating the locking head, so that spiral installation is realized. For the internal angle screw fasteners with different shapes, adjusting heads with different surface numbers are selected, for example, the adjusting head consisting of six radial positioning pieces is adopted when the internal hexagon bolt is installed, the adjusting head consisting of five radial positioning pieces is adopted when the internal hexagon bolt is installed, and the like.

The fastening device also comprises an adjusting head connecting piece; the adjusting head connecting piece is provided with a plurality of guide parts extending out along the radial direction, and the number of the guide parts is consistent with that of the radial positioning pieces; the adjusting hole further comprises a positioning part arranged at a position close to the second end, a radial guide groove is formed at a position corresponding to the positioning part of each radial positioning part, and the radial positioning parts can be in sliding connection with the guide parts through the guide grooves. Adjust first connecting piece and form the structure of similar snowflake through the guide part that radially stretches out, the guide part is from the branch structure that the middle part of adjusting the first connecting piece formed and radial setting element quantity equals to the outside, radial setting element then forms the guide way in the medial surface, guide part and guide way cooperation back, radial setting element can form sliding connection with adjusting first connecting piece, radial setting element can be followed the guide part and moved towards the direction of keeping away from and adjust first axis and slide, a plurality of radial setting element correspond to be installed on the guide part of adjusting the first connecting piece after, can form the adjusting head subassembly that uses adjusting the first connecting piece as central structure.

Furthermore, the power piece also comprises a power main rod, and the lower end of the power main rod is connected with the first end of the locking head.

Furthermore, the power main rod is connected with at least two power push rods perpendicular to the power main rod. The power push rod can drive the power main rod to rotate, so that the locking head rotates.

Furthermore, the power push rod is movably connected with the power main rod, and the power push rod can be rotatably folded to be parallel to the power main rod. Because the power push rod is compared in the perpendicular outside extension of power mobile jib, consequently can occupy great space, adopt swing joint's method to set up the power push rod and can fold the power push rod to closely be parallel with the power mobile jib subsides in non-user state, make things convenient for fastener's accomodating. It should be noted that the parallel is not limited to perfect parallel, but describes a state where the power main rod and the power push rod are approximately aligned and close to each other.

Furthermore, the fastening device also comprises a reinforcing member; the power member is provided with a mounting cavity which axially penetrates through the power main rod and the locking head, the reinforcing member can be installed in the mounting cavity in a matching way, and the lower end of the reinforcing member can extend out of the second end of the locking head; a first clamping part is formed at the lower end of the reinforcing part, and a first matching groove matched with the first clamping part is formed in the middle of the adjusting head connecting piece; the upper end of reinforcement forms second joint portion, and second joint portion can form the joint cooperation with the power mobile jib.

The lower extreme of reinforcement stretches out from the second end of locking head, form the joint with adjusting the first connecting piece, the upper end then forms the joint with the power mobile jib, rotate to suitable position when the locking head makes and adjusts the head and form the butt with the interior angle interface, when rotating the locking head through the power mobile jib, adjust the head except receiving the drive power that the locking head provided, still receive the drive power of transmitting the first connecting piece of regulation through the reinforcement, the resultant force of two drive powers will make and adjust the head and drive interior angle helical fastening spare when rotatory more laborsaving.

Furthermore, a circular central matching area is arranged in the middle of the first matching groove, and a plurality of clamping matching areas which are radially distributed are communicated with the outer sides of the periphery of the central matching area; first joint portion include round bar-shaped reinforcement main part and connect a plurality of first card strips in the reinforcement main part outside all around, every joint strip homoenergetic forms with a joint cooperation district and corresponds.

Furthermore, the second clamping part comprises a round rod-shaped reinforcing part main body and a plurality of second clamping strips connected to the outer side of the periphery of the reinforcing part main body; the inner side wall of the placement cavity is provided with a plurality of second matching grooves which can be matched with the second clamping strips, and each second clamping strip corresponds to one second matching groove.

Furthermore, an adjusting cap is movably mounted at the upper end of the reinforcing member, the adjusting cap can be adjusted and moved along the axial direction of the reinforcing member, and the caliber of the adjusting cap is larger than that of the accommodating cavity.

Through the setting of adjusting the cap, the relative position of adjustable reinforcement in settling the intracavity, and then the position of the first joint portion of adjusting the reinforcement lower extreme makes first joint portion and adjusts between the head connecting piece joint more perfect.

In summary, the following beneficial effects can be achieved by applying the technical scheme of the invention:

1. the adjusting head formed by combining a plurality of radial positioning pieces is matched with the inner angle interface of the inner angle spiral fastener, and the adjusting head can smoothly adjust the caliber size within an allowable range, so that the adjusting head can be matched with any middle inner angle spiral fastener within the range, the application range is greatly expanded, and the defects of low efficiency, time consumption and labor consumption of tools such as a conventional inner hexagonal wrench and the like in the use process are avoided.

2. The invention applies radial pressure to the adjusting head through the locking head, so that the inner angle abutting surface of the outer side surface of the radial positioning piece can be tightly abutted with the side wall of the inner angle connector, a stronger locking effect is formed between the adjusting head and the fastening piece, the adjusting head is not easy to fall off from the inner angle connector when the adjusting head is rotated, and the operation is more convenient.

3. The plurality of radial positioning pieces forming the adjusting head are connected through the adjusting head connecting piece, the adjusting head connecting piece can play a role in guiding the movement of the radial positioning pieces, so that the outline of the adjusting head extends more uniformly, the adjusting head connecting piece can be used for pre-assembling the radial positioning pieces into the adjusting head before the fastener is installed, and the adjusting head can be conveniently clamped into an inner angle interface of the fastener.

4. According to the invention, the adjusting head connecting piece and the power main rod are in stressed connection through the reinforcing piece, the radial positioning piece is simultaneously subjected to the driving force provided by the locking head and the adjusting head connecting piece, and the overall structure is more labor-saving.

5. The power push rod arranged on the power main rod is movably connected with the power main rod, and the power push rod can rotate to be close to the power main rod in parallel, so that the space occupation of the device in a non-use state is reduced, and the device is convenient to store.

Drawings

FIG. 1 is a schematic view showing the overall structure of a fastening device according to embodiment 1;

FIG. 2 is an exploded view of the fastening device in example 1;

FIG. 3 is a schematic view of an adjusting head in embodiment 1;

FIG. 4 is a schematic structural view of a power element in embodiment 1;

FIG. 5 is a schematic view showing a structure of a reinforcing member and an adjusting head connecting member according to embodiment 1;

FIG. 6 is a schematic view of an adjusting head in embodiment 2;

in the figure, 1-an adjusting head, 2-a power part, 3-a reinforcing part, 4-an adjusting head connecting part, 11-a radial positioning part, 21-a locking head, 22-a power main rod, 23-a power push rod, 24-a placing cavity, 111-a thread part, 112-a positioning part, 113-a guide groove, 114-an inner angle abutting surface, 241-a second matching groove, 31-a first clamping part, 32-a second clamping part, 33-an adjusting cap, 311-a first clamping strip, 321-a second clamping strip, 41-a guide part and 42-a first matching groove.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to examples and the accompanying drawings.

Example 1

As shown in fig. 1 to 5, the fastening device for the internal-angle helical fastener provided by the embodiment includes four relatively independent parts: adjusting head 1, power part 2, reinforcement 3 and adjusting head connecting piece 4.

The adjusting head 1 is equally divided into six identical radial positioning elements 11 along the axial tangent plane, and the radial positioning elements 11 are arranged around the horizontal circumference of the central axis of the adjusting head. A through adjusting hole is formed in the middle of the adjusting head, the adjusting hole is divided into a threaded part 111 and a positioning part 112, the threaded part 111 is provided with internal threads, the hole diameter is gradually reduced from the first end (upper end) to the second end (lower end) of the adjusting head to form a conical surface structure, the positioning part is an unthreaded hole without threads, six guide grooves 113 are formed in the inner side wall of the positioning part, the guide grooves are arranged around the horizontal circumference of the central axis of the adjusting head, and each radial positioning part 11 is provided with one guide groove 113; the trend of the guide groove is in the radial direction far away from the central axis of the adjusting head. The lateral wall of radial setting element 11 has two interior angle butt faces 114, and two interior angle butt faces form an outer apex angle, and this outer apex angle can be embedded into the interior apex angle department of the interior angle interface of fasteners such as hexagon socket head cap screw to form the butt with the interior angle interface, when the outer apex angle of six radial setting elements respectively with the interior apex angle formation butt of six interior angle interfaces, adjust the head can form the connection of certain intensity with the fastener, adjust the head and can not drop easily from the interior angle interface. During the in-service use, need put into the interior angle interface with the regulation head in advance, carry out subsequent operation again, because the regulation head comprises six independent radial setting elements, consequently can form loose structure after directly putting into the interior angle interface, be unfavorable for subsequent operation, consequently adopt one to adjust first connecting piece 4 and connect the regulation head in this embodiment, make it form a relatively stable overall structure. Specifically, the adjusting head connector 4 has six guiding portions 41 extending radially outward, and the guiding portions can be matched with the guiding grooves 113 on the radial positioning members, so that the six radial positioning members can be slidably mounted on the adjusting head connector by the matching action of the guiding portions and the guiding grooves, and a complete adjusting head assembly is formed. When the external size of the adjusting head is increased by the outward extending movement of the radial positioning piece, the guide part can enable the radial positioning piece to move towards the fixed direction, and the deformation of the whole structure of the adjusting head is avoided.

The power part 2 comprises a locking head 21 which is relatively positioned at the lower part, a power main rod 22 which is vertically arranged and connected with the first end (upper end) of the locking head, and a power push rod 23 which is transversely arranged and vertical to the power main rod. Wherein, the locking head is used for applying radial drive to adjusting the head and makes radial setting element outwards extend and remove, and first external dimension is adjusted in the increase to after the interior angle interface formation butt of adjusting head and fastener, provide radial locking power, make radial setting element and interior angle interface form inseparable butt. Specifically, the caliber of the locking head is gradually reduced from the first end to the second end to form a conical surface structure, and the conical surface structure of the locking head has the same taper as that of the conical surface structure of the thread part; the outer side wall of the locking head is provided with an external thread structure which can form a corresponding with the internal thread of the thread part. The power push rod is used for conveniently exerting external force on the device to enable the adjusting head to drive the fastener to rotate, the power main rod plays a role in force conduction, force at the power push rod is transmitted to the locking head, the locking head acts on the adjusting head, and finally the adjusting head acts on the fastener. Specifically, power push rod and power mobile jib adopt the swing joint mode, if the pivot is connected, power push rod is rotatable to the parallel state of hugging closely with the power mobile jib, avoids the space to occupy, convenient storage. The middle part of the power part is also provided with a placement cavity which axially penetrates through the power main rod and the locking head, and the placement cavity is used for mounting the reinforcing part 3.

Reinforcement 3 is shaft-like structure, and its lower extreme is equipped with first joint portion 31, and the upper end is equipped with second joint portion 32, and first joint portion can form the locking with regulation head connecting piece 4 and be connected, and second joint portion can form the locking with power mobile jib 22 and be connected to make the power mobile jib pass through the reinforcement application of force in adjusting head connecting piece. Specifically, first joint portion 31 includes cylindrical reinforcement main part and sets up six first card strips 311 in the reinforcement main part outside all around, and every first card strip all sets up along the axial, and six first card strips are arranged around reinforcement central axis horizontal circumference, and is relative, adjusts the middle part of first connecting piece 4 and forms first cooperation groove, and first cooperation groove middle part can hold the reinforcement main part, and the outside then forms six gear latch tooth's notch around the middle part, and each first card strip homoenergetic forms the joint with a notch. Likewise, the second joint portion includes cylindrical reinforcement main part and sets up six second card strips 321 in the reinforcement main part outside all around, and is relative, is equipped with second cooperation groove 241 on the inside wall of settling chamber 24, and second cooperation groove 241 includes six bar notches along the axial trend, and each bar notch all corresponds with a second card strip 321. An adjusting cap 33 is also arranged at the uppermost end of the reinforcing member, the adjusting cap is spirally connected with the reinforcing member, and the relative position of the adjusting cap on the reinforcing member can be adjusted through rotation.

Specific methods of use of the invention are provided below: (1) installing six radial positioning pieces 11 on the adjusting head connecting piece 4 to form a complete adjusting head 1; (2) placing the adjusting head 1 into an inner corner interface of the fastener; (3) the locking head 21 of the power part 2 is abutted into the adjusting hole in the middle of the adjusting head from the upper part, the external thread of the locking head is matched with the internal thread of the adjusting hole, then the locking head is rotated through the power push rod, and along with the rotation of the locking head, the radial positioning part is uniformly moved and unfolded outwards under the guiding action of the adjusting head connecting part until the radial positioning part is abutted against the inner angle port; (4) inserting a reinforcing member from the upper end of a mounting cavity of the power main rod, enabling a first clamping part at the lower end of the reinforcing member and a first matching groove at the middle part of a regulating head connecting member to form clamping fit, enabling a second clamping part at the upper end of the reinforcing member and a second matching groove on the inner side wall of the mounting cavity to form clamping fit, and properly adjusting a regulating cap at the uppermost end of the reinforcing member; (5) continuing to rotate the fastener through the power push rod until the mounting strength standard is met; (6) the power push rod is reversely pushed to separate the adjusting head from the locking head, and all the components are disassembled in sequence, so that the installation of the fastener is completed.

Example 2

The general structure of this embodiment is the same as that of embodiment 1, except that the structure of the adjusting head and the radial positioning member is slightly different. As shown in fig. 6, the dividing manner of the adjusting head in this embodiment is different from that in fig. 3, the outer sidewall of the radial positioning element obtained by the dividing method shown in fig. 6 only has one inner corner abutting surface 114, and each radial positioning element abuts against one side edge of the inner corner interface instead of the inner corner in actual use.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims (9)

1. A fastening device for an internal angle helical fastener, characterized by: comprises an adjusting head (1) and a power part (2); the adjusting head is provided with an adjusting hole which penetrates through along the axial direction, and the adjusting hole is provided with a threaded part (111) with the diameter gradually reduced from the first end to the second end of the adjusting head; the adjusting head (1) is composed of a plurality of radial positioning pieces (11), the radial positioning pieces (11) are horizontally and circumferentially arranged around the axis of the adjusting head (1), and the outer side surface of each radial positioning piece (11) is at least provided with an inner angle abutting surface (114); the power part (2) is provided with a locking head (21), the diameter of the first end to the second end of the locking head (21) is gradually reduced to form a conical structure, and an external thread capable of being matched with the thread part (111) is arranged on the outer side wall of the conical structure.

2. A fastening device for an internal angle helical fastener, as set forth in claim 1, wherein: the fastening device also comprises an adjusting head connecting piece (4); the adjusting head connecting piece (4) is provided with a plurality of guide parts (41) extending along the radial direction, and the number of the guide parts (41) is consistent with that of the radial positioning pieces (11); the adjusting hole further comprises a positioning part (112) arranged at a position close to the second end of the adjusting head, the inner side wall of the positioning part (112) is provided with a plurality of guide grooves (113), the guide grooves (113) are horizontally and circumferentially arranged around the central axis of the adjusting head, and each radial positioning piece (11) is provided with one guide groove (113); the guide groove (113) and the guide part (41) can form sliding connection.

3. A fastening device for an internal angle helical fastener, as claimed in claim 2, wherein: the power piece also comprises a power main rod (22), and the lower end of the power main rod (22) is connected with the first end of the locking head (21).

4. A fastening device for an internal angle helical fastener according to claim 3, wherein: the power main rod (22) is connected with at least two power push rods (23) which are vertical to the power main rod.

5. A fastening device for an internal angle helical fastener according to claim 4, wherein: the power push rod (23) is movably connected with the power main rod (22), and the power push rod can be rotatably folded to be parallel to the power main rod.

6. A fastening device for an internal angle helical fastener according to claim 3, wherein: the fastening device further comprises a reinforcement (3); the power member (2) is provided with a placement cavity (24) which axially penetrates through the power main rod (22) and the locking head (21), the reinforcing member (3) can be installed in the placement cavity (24) in a matching mode, and the lower end of the reinforcing member (3) can extend out of the second end of the locking head (21); a first clamping part (31) is formed at the lower end of the reinforcing part (3), and a first matching groove (42) matched with the first clamping part (31) is formed in the middle of the adjusting head connecting piece; the upper end of reinforcement (3) forms second joint portion (32), power mobile jib (22) on be equipped with second joint portion forms complex second cooperation groove (241).

7. A fastening device for an internal angle helical fastener according to claim 6, wherein: the first clamping portion (31) comprises a round rod-shaped reinforcing part main body and a plurality of first clamping strips (311) connected to the outer side of the periphery of the reinforcing part main body.

8. A fastening device for an internal angle helical fastener according to claim 6, wherein: the second clamping part (32) comprises a round rod-shaped reinforcing part main body and a plurality of second clamping strips (321) connected to the outer side of the periphery of the reinforcing part main body; the second fitting groove (341) includes a plurality of bar-shaped notches formed on the inner side wall of the mounting cavity (24), and each of the second locking strips (321) corresponds to one of the bar-shaped notches.

9. A fastening device for an internal angle helical fastener according to claim 8, wherein: the upper end of the reinforcing member is also provided with an adjusting cap (33) which is movably connected, the adjusting cap can be axially adjusted and moved along the reinforcing member, and the caliber of the adjusting cap is larger than that of the accommodating cavity (24).

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