A fastening device for internal angle spiral fasteners

Abstract

The present invention provides a fastening device for internal angle spiral fasteners, the device includes an adjusting head and a power member; the adjusting head has a through adjusting hole arranged along the axial direction, the adjusting hole has a threaded portion with a gradually decreasing aperture from the first end to the second end of the adjusting head; the adjusting head is composed of a plurality of radial positioning members, the radial positioning members are arranged circumferentially around the axis of the adjusting head, the outer side surface of each positioning member has an internal angle abutment surface, and the inner side surface forms a curved surface structure constituting the adjusting hole; the power member has a locking head, the locking head has a gradually decreasing diameter from the first end to the second end, the outer side wall of the locking head has an external thread, and the locking head can form a match with the threaded portion. By rotating the power member of the present invention, the radial positioning members constituting the adjusting head can be driven to move outward, so that the adjusting head can be matched with internal angle spiral fasteners such as hexagon socket bolts of various specifications, without the need for a large number of wrenches.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical parts installation, in particular to a fastening device for internal angle spiral fasteners. Background Art

[0002] Internal angle spiral fasteners, that is, fastening objects with an internal angle interface, are usually installed by applying force to the internal angle interface to make it rotate around the axis, and use the threads it carries to connect with other objects. Common objects of this type include hexagon socket bolts, pentagon socket bolts, and tetrahedron socket bolts. In contrast, external angle fasteners are rotated by applying force from the outer periphery, such as ordinary hexagon nuts. Taking the hexagon socket bolt as an example, its internal angle interface has a groove with a regular hexagonal cross section. When installing, the end of an internal hexagon wrench with a regular hexagonal cross section is usually inserted into the groove so that the end and the groove form a snap fit, and then force is applied to the internal hexagon wrench to drive the internal hexagon bolt to rotate around the axis, thereby achieving rotational installation.

[0003] Most existing hexagon socket wrenches are set with hexagon socket bolts, which have poor versatility. Since the internal angle interface specifications of different types of hexagon socket bolts are different, each type of bolt needs to correspond to a specific type of wrench. When bolts of various specifications need to be installed, different types of wrenches need to be used respectively. Since the process of replacing wrenches is time-consuming and labor-intensive, the construction efficiency will be seriously reduced, and a large number of different types of wrenches are inconvenient to carry and are easy to lose. The patent document with application number CN201711049772.4 provides a hexagon socket telescopic movable wrench, which sets a variety of different types of hexagonal connectors in sequence, sets a small-diameter hexagonal connector in a large-diameter hexagonal connector, and extends and uses the hexagonal connector of the corresponding specification according to actual needs, so as to solve the disadvantage of poor versatility of general hexagon socket wrenches. Although the above invention patent has improved the versatility of the hexagon socket wrench to a certain extent, it still has defects. The technical solution to the problem is to set up multiple hexagon socket joints, and the hexagon socket bolt to be installed must correspond to one of the multiple hexagon socket joints, otherwise the construction cannot be carried out. Therefore, the scope of application of the invention corresponds to the number of hexagon socket joints set. When the number of hexagon socket joints set is too small, good versatility cannot be achieved. When the number of hexagon socket joints is too large, the wrench structure will become complicated and bulky. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a fastening device for an internal angle spiral fastener, which can freely adjust the diameter size of the internal angle joint within a certain range, rather than simply combining multiple types of hexagonal joints as shown in the prior art, thereby greatly improving the versatility of the fastening device and the construction efficiency when installing the fastener. Moreover, since the diameter size can be freely adjusted, the internal angle joint of the present invention and the internal angle interface of the internal angle spiral fastener cooperate more accurately and firmly, making the internal angle spiral fastener less likely to slip when rotating, and easier to install.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] A fastening device for an internal angle spiral fastener, comprising an adjusting head and a power member; the adjusting head has a through adjusting hole arranged along the axial direction, and the adjusting hole has a threaded portion whose aperture gradually decreases from the first end to the second end of the adjusting head; the adjusting head is composed of a plurality of radial positioning members, and the radial positioning members are arranged circumferentially around the axis of the adjusting head, and the outer side surface of each positioning member has an inner angle abutment surface, and the inner side surface forms a curved surface structure constituting the adjusting hole; the power member has a locking head, and the locking head has a diameter gradually decreasing from the first end to the second end, and the outer side wall of the locking head has an external thread, and the locking head can form a match with the threaded portion.

[0007] The present invention mainly achieves the effect of freely adjusting the caliber size of the inner angle joint through an adjusting head that can be extended and expanded outward. The adjusting head is composed of multiple equally divided radial positioning members. Specifically, when the adjusting head is a hexagonal structure, it is assembled by six equally divided radial positioning members. When the adjusting head is a pentagonal structure, it is composed of five equally divided radial positioning members, and so on. Multiple radial positioning members are arranged in a petal-shaped structure around the central axis of the adjusting head. The outer side of each radial positioning member has an inner angle abutting surface for forming an abutment with one side of the inner angle interface of the fastener. Taking the inner hexagon socket bolt as an example, the inner angle interface of the inner hexagon socket bolt has six side surfaces, and the six radial positioning members constituting the adjusting head are respectively abutted with one of the side surfaces, thereby forming a matching structure between the adjusting head and the inner angle interface. When facing inner angle interfaces of different calibers, since the adjusting head is composed of six independent radial positioning members, the radial positioning members can extend and move in a direction away from the central axis, thereby changing the outline size of the adjusting head, and finally matching with the inner angle interface. Specifically, the extension and movement of the radial positioning member is realized by the power member. An adjusting hole is formed in the middle of the adjusting head along the axial direction. The adjusting hole has a threaded portion with a gradually decreasing diameter and an internal thread. The power member has a locking head with a gradually decreasing diameter and an external thread. After the locking head is matched with the adjusting hole, the locking head is rotated. The locking head will provide radial pressure to the adjusting head toward the outside on all sides. Under the action of the radial pressure, the radial positioning member moves away from the central axis of the adjusting head and gradually spreads out, thereby increasing the size of the outer contour of the adjusting head and forming a fit with the inner angle interface; when the locking head and the inner angle interface are matched, continuing to rotate the locking head can drive the inner angle spiral fastener to rotate, thereby realizing spiral installation. For inner angle spiral fasteners of different shapes, adjusting heads with different numbers of faces are selected. For example, when installing a hexagon socket bolt, an adjusting head composed of six radial positioning members is used, and when installing a pentagon socket bolt, an adjusting head composed of five radial positioning members is used, and so on.

[0008] The fastening device also includes an adjusting head connector; the adjusting head connector has a plurality of guide parts extending radially, and the number of the guide parts is consistent with the number of radial positioning parts; the adjusting hole also includes a positioning part arranged near the second end position, and each radial positioning part forms a radial guide groove at a position corresponding to the positioning part, and the radial positioning part can form a sliding connection with the guide part through the guide groove. The adjusting head connector forms a snowflake-like structure through the radially extending guide part, and the guide part forms a branch structure equal to the number of radial positioning parts from the middle part of the adjusting head connector to the outside, and the radial positioning part forms a guide groove on the inner side. After the guide part cooperates with the guide groove, the radial positioning part can form a sliding connection with the adjusting head connector, and the radial positioning part can slide along the direction of the guide part in a direction away from the axis of the adjusting head. After a plurality of radial positioning parts are correspondingly installed on the guide part of the adjusting head connector, an adjusting head assembly with the adjusting head connector as the central structure can be formed.

[0009] Furthermore, the power member further comprises a power main rod, the lower end of which is connected to the first end of the locking head.

[0010] Furthermore, the power main rod is connected to at least two power push rods perpendicular to the power main rod, and the power push rods can drive the power main rod to rotate, thereby causing the locking head to rotate.

[0011] Furthermore, the power push rod is movably connected to the power main rod, and the power push rod can be rotated and folded to be parallel to the power main rod. Since the power push rod is vertically extended outward compared to the power main rod, it will occupy a large space. The power push rod is arranged by a movably connected method so that the power push rod can be folded to be closely parallel to the power main rod when not in use, which is convenient for the storage of the fastening device. It should be noted that the parallel here is not limited to perfect parallelism, but describes a state in which the power main rod and the power push rod are roughly aligned and close to each other.

[0012] Furthermore, the fastening device also includes a reinforcement piece; the power piece has an accommodation cavity which axially passes through the power main rod and the locking head, the reinforcement piece can be installed in the accommodation cavity, and the lower end of the reinforcement piece can extend from the second end of the locking head; the lower end of the reinforcement piece forms a first clamping portion, and the middle part of the adjusting head connecting piece forms a first matching groove which matches with the first clamping portion; the upper end of the reinforcement piece forms a second clamping portion, and the second clamping portion can form a clamping fit with the power main rod.

[0013] The lower end of the reinforcement extends out from the second end of the locking head and forms a snap connection with the adjusting head connecting piece, while the upper end forms a snap connection with the power main rod. When the locking head is rotated to a suitable position so that the adjusting head and the inner angle interface are in abutment, when the locking head is rotated by the power main rod, the adjusting head receives not only the driving force provided by the locking head, but also the driving force transmitted to the adjusting head connecting piece through the reinforcement. The combined force of the two driving forces will make it more labor-saving when the adjusting head drives the inner angle spiral fastener to rotate.

[0014] Furthermore, the first mating groove has a circular central mating area in the middle, and the central mating area is connected to a plurality of snap-fitting areas radially distributed on the outside thereof; the first snap-fitting portion includes a round rod-shaped reinforcement body and a plurality of first snap-fitting strips connected to the outside of the reinforcement body, and each snap-fitting strip can correspond to a snap-fitting area.

[0015] Furthermore, the second clamping portion includes a round rod-shaped reinforcement body and a plurality of second clamping strips connected to the outside of the reinforcement body; the inner wall of the placement cavity is provided with a plurality of second matching grooves that can cooperate with the second clamping strips, and each of the second clamping strips corresponds to a second matching groove.

[0016] Furthermore, an adjusting cap is movably mounted on the upper end of the reinforcement member, and the adjusting cap can be adjusted and moved along the axial direction of the reinforcement member, and the caliber of the adjusting cap is larger than the caliber of the accommodating cavity.

[0017] By setting the adjusting cap, the relative position of the reinforcement piece in the placement cavity can be adjusted, and then the position of the first clamping part at the lower end of the reinforcement piece can be adjusted, so that the clamping between the first clamping part and the adjusting head connector is more perfect.

[0018] In summary, the application of the technical solution of the present invention can achieve the following beneficial effects:

[0019] 1. The present invention uses an adjusting head composed of a plurality of radial positioning members to adapt to the inner angle interface of the inner angle spiral fastener. Since the adjusting head can smoothly adjust the diameter within the allowable range, it can adapt to any inner angle spiral fastener within the range, greatly broadening the scope of application and avoiding the shortcomings of conventional tools such as hexagonal wrenches, such as low efficiency, time-consuming and labor-intensive during use.

[0020] 2. The present 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 form a tight abutment with the side wall of the inner angle interface, so that a strong locking effect is formed between the adjusting head and the fastener. When the adjusting head is rotated, the adjusting head is not easy to fall off from the inner angle interface, and the operation is more convenient.

[0021] 3. In the present invention, multiple radial positioning members constituting the adjusting head are connected by an adjusting head connecting member. The adjusting head connecting member can guide the movement of the radial positioning members, so that the outer contour of the adjusting head can be extended more evenly. Before installing the fastener, the radial positioning members can be pre-assembled into an adjusting head using the adjusting head connecting member, which facilitates the adjustment head to be inserted into the inner angle interface of the fastener.

[0022] 4. The present invention uses a reinforcing member to form a force connection between the adjusting head connecting member and the power main rod, and the radial positioning member is simultaneously driven by the locking head and the adjusting head connecting member, so that the overall structure is more labor-saving.

[0023] 5. The power push rod arranged on the power main rod of the present invention is movably connected with the power main rod, and the power push rod can be rotated to be parallel and close to the power main rod, thereby reducing the space occupied by the device when not in use and facilitating storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the fastening device in Example 1;

[0025] Figure 2 is an exploded view of the fastening device in Example 1;

[0026] Figure 3 This is a schematic diagram of the structure of the regulating head in Example 1;

[0027] Figure 4 It is a schematic diagram of the structure of the power component in Example 1;

[0028] Figure 5 This is a schematic diagram of the structure of the reinforcement member and the adjustment head connector in Example 1;

[0029] Figure 6 This is a schematic diagram of the structure of the regulating head in Example 2;

[0030] In the figure, 1-adjusting head, 2-power member, 3-reinforcing member, 4-adjusting head connecting member, 11-radial positioning member, 21-locking head, 22-power main rod, 23-power push rod, 24-settling cavity, 111-threaded portion, 112-positioning portion, 113-guide groove, 114-inner angle abutment surface, 241-second matching groove, 31-first clamping portion, 32-second clamping portion, 33-adjusting cap, 311-first clamping strip, 321-second clamping strip, 41-guide portion, 42-first matching groove. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below through examples and drawings.

[0032] Example 1

[0033] like Figures 1 to 5 As shown, the fastening device for the inner angle spiral fastener provided in this embodiment includes four relatively independent parts: an adjusting head 1, a power part 2, a reinforcing part 3 and an adjusting head connecting part 4.

[0034] The adjusting head 1 is equally divided into six identical radial positioning members 11 along the axial section, and the radial positioning members 11 are arranged horizontally around the central axis of the adjusting head. A through adjusting hole is formed in the middle of the adjusting head, and the adjusting hole is divided into two parts: a threaded part 111 and a positioning part 112. The threaded part 111 has an internal thread, and the aperture gradually decreases from the first end (upper end) to the second end (lower end) of the adjusting head, forming a conical surface structure. The positioning part is a light hole without threads, and six guide grooves 113 are arranged on the inner side wall of the positioning part. The guide grooves are arranged horizontally around the central axis of the adjusting head, and each radial positioning member 11 has a guide groove 113; the direction of the guide groove is a radial direction away from the central axis of the adjusting head. The outer wall of the radial positioning member 11 has two inner angle abutment surfaces 114, and the two inner angle abutment surfaces form an outer top angle, which can be embedded in the inner top angle of the inner angle interface of the hexagon socket bolt and other fasteners, so as to form abutment with the inner angle interface. When the outer top angles of the six radial positioning members are respectively abutted with the inner top angles of the six inner angle interfaces, the adjustment head can form a connection with the fastener with a certain strength, and the adjustment head will not fall off from the inner angle interface easily. In actual use, it is necessary to insert the adjustment head into the inner angle interface in advance before performing subsequent operations. Since the adjustment head is composed of six independent radial positioning members, it will form a loose structure after being directly placed in the inner angle interface, which is not conducive to subsequent operations. Therefore, in this embodiment, an adjustment head connector 4 is used to connect the adjustment head to form a relatively stable overall structure. Specifically, the adjusting head connecting member 4 has six guide portions 41 extending radially outward, and the guide portions can cooperate with the guide grooves 113 on the radial positioning member, so that the six radial positioning members can be slidably installed on the adjusting head connecting member through the cooperation of the guide portions and the guide grooves with the adjusting head connecting member as the center, and form a complete adjusting head assembly. When the outer dimensions of the adjusting head are increased by the outward extension movement of the radial positioning members, the guide portions can make the radial positioning members move in a fixed direction to avoid deformation of the overall structure of the adjusting head.

[0035] The power member 2 includes a locking head 21 relatively located below, a vertically arranged power main rod 22 connected to the first end (upper end) of the locking head, and a horizontally arranged power push rod 23 perpendicular to the power main rod. Among them, the locking head is used to apply a radial driving force to the adjusting head to make the radial positioning member extend and move outward, increase the external size of the adjusting head, and provide a radial locking force after the adjusting head and the inner angle interface of the fastener are in contact, so that the radial positioning member and the inner angle interface are in close contact. Specifically, the diameter of the locking head gradually decreases from the first end to the second end, forming a conical structure, and the conical structure of the locking head is consistent with the conical structure of the threaded part; the outer wall of the locking head is provided with an external thread structure that can form a corresponding internal thread of the threaded part. The power push rod is used to facilitate the application of external force to the device so that the adjusting head drives the fastener to rotate, and the power main rod plays a role in force transmission, transmitting the force at the power push rod to the locking head, and then the locking head acts on the adjusting head, and finally the adjusting head acts on the fastener. Specifically, the power push rod and the power main rod are connected in an active manner, such as a rotating shaft connection, and the power push rod can be rotated to be parallel and close to the power main rod to avoid space occupation and facilitate storage. A placement cavity axially penetrating the power main rod and the locking head is also provided in the middle of the power member, and the placement cavity is used to install the reinforcement member 3.

[0036] The reinforcement 3 is a rod-shaped structure, with a first clamping portion 31 at its lower end and a second clamping portion 32 at its upper end. The first clamping portion can form a locking connection with the adjustment head connector 4, and the second clamping portion can form a locking connection with the power main rod 22, so that the power main rod can apply force to the adjustment head connector through the reinforcement. Specifically, the first clamping portion 31 includes a columnar reinforcement body and six first clamping strips 311 arranged on the outside of the reinforcement body. Each first clamping strip is arranged axially, and the six first clamping strips are arranged horizontally around the central axis of the reinforcement. In contrast, a first matching groove is formed in the middle of the adjustment head connector 4. The middle of the first matching groove can accommodate the reinforcement body, and six gear-shaped notches are formed around the middle on the outside, and each first clamping strip can be connected to a notch. Similarly, the second clamping part includes a columnar reinforcement body and six second clamping strips 321 arranged on the outer side of the reinforcement body. In contrast, a second matching groove 241 is provided on the inner side wall of the placement cavity 24. The second matching groove 241 includes six strip-shaped notches extending along the axial direction, and each strip-shaped notch corresponds to a second clamping strip 321. An adjustment cap 33 is also provided at the uppermost end of the reinforcement. The adjustment cap is screwed to the reinforcement, and its relative position on the reinforcement can be adjusted by rotation.

[0037] The following is a specific method of using the present invention: (1) six radial positioning members 11 are installed on the adjusting head connecting member 4 to form a complete adjusting head 1; (2) the adjusting head 1 is placed in the inner angle interface of the fastener; (3) the locking head 21 of the power member 2 is pushed from above into the adjusting hole in the middle of the adjusting head, and the external thread of the locking head is matched with the internal thread of the adjusting hole, and then the locking head is rotated by the power push rod. As the locking head rotates, the radial positioning members are evenly moved outward and expanded under the guidance of the adjusting head connecting member until the radial positioning members are aligned with the inner thread of the adjusting hole. The corner interface forms abutment; (4) Insert the reinforcement member from the upper end of the placement cavity of the power main rod, so that the first clamping portion at the lower end of the reinforcement member forms a clamping fit with the first matching groove in the middle of the adjustment head connecting member, and the second clamping portion at the upper end of the reinforcement member forms a clamping fit with the second matching groove on the inner side wall of the placement cavity, and appropriately adjust the adjustment cap at the uppermost end of the reinforcement member; (5) Continue to rotate the fastener through the power push rod until it meets the installation strength standard; (6) Push the power push rod in the reverse direction to separate the adjustment head from the locking head, and disassemble each component in turn to complete the installation of the fastener.

[0038] Example 2

[0039] The general structure of this embodiment is the same as that of Embodiment 1, except that the structures of the adjustment head and the radial positioning member are slightly different. Figure 6 As shown, the segmentation method of the regulating head in this embodiment is similar to Figure 3 There is a difference, Figure 6 The outer wall of the radial positioning member obtained by the segmentation method shown has only one inner corner abutment surface 114. In actual use, each radial positioning member abuts against a side edge of the inner corner interface rather than the inner top corner.

[0040] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A fastening device for internal angle spiral fasteners, Features: The invention comprises an adjusting head (1) and a power member (2); the adjusting head has an adjusting hole which penetrates along the axial direction, the adjusting hole has a threaded portion (111) whose aperture gradually decreases from the first end to the second end of the adjusting head; the adjusting head (1) is composed of a plurality of radial positioning members (11), the radial positioning members (11) are horizontally arranged around the axis of the adjusting head (1), and the outer side surface of each radial positioning member (11) has at least one inner angle abutting surface (114); the power member (2) has a locking head (21), the diameter of the locking head (21) gradually decreases from the first end to the second end to form a conical structure, and the outer wall of the conical structure is provided with a The fastening device further comprises an adjusting head connecting member (4); the adjusting head connecting member (4) is provided with a plurality of guide portions (41) extending radially, the number of the guide portions (41) being the same as the number of the radial positioning members (11); the adjusting hole further comprises a positioning portion (112) arranged near the second end of the adjusting head, the inner side wall of the positioning portion (112) being provided with a plurality of guide grooves (113), the guide grooves (113) being arranged horizontally circumferentially around the central axis of the adjusting head, and each radial positioning member (11) being provided with a guide groove (113); the guide grooves (113) and the guide portions (41) can be shaped The power member (2) further comprises a power main rod (22), the lower end of which is connected to the first end of the locking head (21); the fastening device further comprises a reinforcing member (3); the power member (2) comprises a placement cavity (24) which axially passes through the power main rod (22) and the locking head (21); the reinforcing member (3) can be fitted in the placement cavity (24), and the lower end of the reinforcing member (3) can extend from the second end of the locking head (21); the lower end of the reinforcing member (3) forms a first clamping portion (31), and the middle part of the adjusting head connecting member forms a first matching groove (42) which matches the first clamping portion (31). ; The upper end of the reinforcement (3) forms a second clamping portion (32), and the power main rod (22) is provided with a second matching groove (241) that matches with the second clamping portion; the first clamping portion (31) includes a round rod-shaped reinforcement body and a plurality of first clamping strips (311) connected to the outside of the reinforcement body; the second clamping portion (32) includes a round rod-shaped reinforcement body and a plurality of second clamping strips (321) connected to the outside of the reinforcement body; the second matching groove (341) includes a plurality of strip-shaped notches formed on the inner side wall of the placement cavity (24), and each of the second clamping strips (321) corresponds to one of the strip-shaped notches.

2. A fastening device for an inner angle spiral fastener according to claim 1, Features: The power main rod (22) is connected to at least two power push rods (23) which are perpendicular to the power main rod.

3. A fastening device for an inner angle spiral fastener according to claim 2, Features: The power push rod (23) is movably connected to the power main rod (22), and the power push rod can be rotated and folded to be parallel to the power main rod.

4. A fastening device for an inner angle spiral fastener according to claim 1, Features: A movably connected adjustment cap (33) is also installed on the upper end of the reinforcement piece. The adjustment cap can be adjusted and moved along the axial direction of the reinforcement piece, and the diameter of the adjustment cap is larger than the diameter of the placement cavity (24).

Images