CN112228441A

CN112228441A - Screw rod

Info

Publication number: CN112228441A
Application number: CN201910637150.6A
Authority: CN
Inventors: 禤豪兵
Original assignee: Haisiguang Electronics Co ltd
Current assignee: Haisiguang Electronics Co ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2021-01-15
Anticipated expiration: 2039-07-15
Also published as: CN112228441B

Abstract

The application provides a screw, which comprises a rod part, a head part and an operation cap which are fixedly connected in sequence, wherein the rod part comprises an installation part, the head part is provided with an installation hole matched with the installation part, and the installation part and the installation hole are circumferentially fixed through a first circumferential limiting mechanism; the head is far away from one side of pole portion and has the counter bore, utilizes set screw with the diapire of counter bore and the tip fixed connection of the installation department of pole portion, realizes the axial connection of head and pole portion. The side of the head part, which is far away from the rod part, is provided with a counter bore, and the bottom wall of the counter bore is fixedly connected with the end part of the mounting part of the rod part by using a fixing screw, so that the axial connection between the head part and the rod part is realized, and the head part and the rod part can be prevented from falling off; when the operation cap and the head are installed, the operation cap covers the opening of the counter bore to prevent the fixing screw from being exposed, the operation cap and the head are circumferentially fixed through the second circumferential limiting mechanism, and an operator can drive the whole rod part to rotate through the head when driving the operation cap to rotate around the axis of the rod part.

Description

Screw rod

Technical Field

The application relates to the technical field of communication product accessories, in particular to a screw.

Background

The optical module is composed of optoelectronic devices, a functional circuit, an optical interface and the like, the optical module is used for photoelectric conversion, a transmitting end converts an electric signal into an optical signal, and a receiving end converts the optical signal into the electric signal after the optical signal is transmitted through an optical fiber. As a photoelectric conversion component, an optical module is an important component of a communication product.

In the prior art, when an optical module is mounted in a communication product, a screw rod is usually required to fix the optical module. Referring to fig. 1, fig. 1 is a schematic structural diagram of a screw in the prior art; the screw comprises a rod part 1 and a head part 2, wherein the rod part 1 and the head part 2 are fixedly installed, specifically, the rod part 1 is provided with an installation part 12, the head part 2 is provided with an installation hole which is sleeved on the outer side of the installation part 12, and the installation part 12 is matched with the installation hole to enable the rod part 1 and the head part 2 to be circumferentially fixed. The side of the head 2 away from the rod 1 has a threaded hole, the corresponding mounting portion 12 of the rod 1 also has a threaded hole, and the head 2 and the rod 1 are axially fixed by the fixing screw 3, so that the screw can be mounted and dismounted by rotating the head.

In the prior art, the head part can be manually rotated to detach the screw rod, or the head part 2 is provided with the straight groove 22, so that the fixing screw 3 is positioned at the bottom of the straight groove 22, and the screw rod can be installed and detached by the aid of a tool corresponding to the straight groove 22. In order to construct safely, prevent that the screwdriver from following the roll-off of straight line groove 22, the accident takes place, and the unable style of calligraphy screwdriver that uses of prior art, consequently, the screw rod among the prior art can't use the screwdriver to install and dismantle, and installation and dismantlement efficiency are lower, and in addition, set screw leaks outward, leads to the maloperation easily, demolishs set screw, leads to the module to be difficult to demolish.

Disclosure of Invention

The application provides a screw rod to avoid the set screw of screw rod to be demolishd by the maloperation, improve the reliability of screw rod.

The application particularly provides a screw for mounting an optical module of a communication product, and the screw particularly comprises a rod part, a head part and an operating cap; specifically, the rod part is fixedly connected with the head part, and the head part is fixedly connected with the operating cap, when the fixed connection of the head part and the rod part is realized, the rod part comprises an installation part, the head part is provided with an installation hole matched with the installation part, and the installation hole is matched with the installation part, so that a first circumferential limiting mechanism is formed, the circumferential fixation of the head part and the rod part is realized, and the head part can drive the rod part to rotate when rotating around the axis of the rod part; meanwhile, a counter bore is formed in one side, away from the rod part, of the head part, and the bottom wall of the counter bore is fixedly connected with the end part of the mounting part of the rod part through a fixing screw, so that the axial connection between the head part and the rod part is realized, and the head part and the rod part can be prevented from falling off; in order to prevent the misoperation of the fixing screws for connecting the head part and the rod part by an operator, when the operation cap and the head part are installed, the operation cap covers the opening of the counter bore to prevent the fixing screws from being exposed, and the operation cap and the head part are circumferentially fixed through the second circumferential limiting mechanism, so that the operator can drive the whole rod part to rotate by driving the operation cap to rotate around the axis of the rod part. In the embodiment, the fixing screw is covered in the counter bore by the operation cap, so that the situation that the fixing screw is detached by misoperation can not occur to a user, and the reliability of the screw rod is improved.

Of course, in an implementation manner, in order to enable the screw rods to be assembled and disassembled in batches through the screwdriver, when the operation cap is specifically arranged, one side, away from the rod portion, of the operation cap is provided with a groove, and the groove can be a cross groove, a plum blossom groove, an inner hexagonal groove or a cross groove. Set up above-mentioned fluting at the operation cap, this fluting structure is comparatively complicated, can criticize the head at the spacing electricity in the plane of the axial direction of perpendicular to pole portion to the operation cap after the fluting can utilize the electricity to criticize the rotation, utilizes the electricity to criticize drive pole portion, consequently, pole portion in this embodiment can utilize the electricity to criticize and install and dismantle, improves operating efficiency.

When the axial fixing of the operation cap and the head is realized, the specific fixing mode is not limited, in one realization mode, one side of the operation cap, which faces to the counter bore, is provided with a mounting bulge, and the mounting bulge of the operation cap is in interference fit with the counter bore so as to realize the circumferential fixing of the operation cap and the head; as the operating cap is mainly stressed in the circumferential direction when in use. Therefore, the interference fit installation can also meet the strength requirement of axial fixation.

In another mode of realizing the axial fixation of the operation cap and the head, an installation bulge is arranged on one side, facing the counter bore, of the operation cap, and the side wall, provided with the counter bore, of the head and the installation bulge, provided with the operation cap, of the operation cap can be connected through a limiting part, so that the circumferential limitation of the operation cap and the head is realized.

When specifically setting up above-mentioned locating part, the concrete structure of locating part does not do the restriction, and in a specific technical scheme, the locating part can be the pin, and is corresponding, and the lateral wall and the installation arch of the counter bore of head have the cotter hole, and above-mentioned pin is installed in above-mentioned cotter hole to realize the installation of head and operation cap. Of course, the axial direction of the pin hole can intersect with the axial line of the rod part, so that circumferential fixation between the operating cap and the head part can be better realized.

When specifically setting up above-mentioned pin, can make pin and cotter hole interference fit, the surface of pin has the annular knurl structure to this technical scheme can improve the reliability of being connected of pin and head and operation cap.

In another specific technical scheme, the limiting member may also be a screw, and correspondingly, the side wall of the counter bore of the head and/or the mounting protrusion has a threaded hole, and the screw is in threaded fit with the threaded hole to mount the head and the operating cap. Of course, the axial direction of the threaded hole may intersect the axis of the shank.

Specifically, when the screw is provided, the screw can be a slotted flat-end set screw, so that the end of the screw is not exposed from the edge of the head, and the outer wall structure of the screw can be simplified.

In another specific technical scheme, the limiting part can also be a rivet, correspondingly, the side wall of the counter bore of the head and the mounting protrusion are provided with rivet holes, and the rivet penetrates through the side wall of the counter bore and the rivet holes of the mounting protrusion to fix the head and the operating cap, so that the mounting of the head and the operating cap is realized.

When the first circumferential limiting mechanism is specifically realized, various implementation modes can be provided, in one implementation mode, the mounting part is provided with a protrusion extending along the radial direction, the mounting hole is provided with a groove matched with the protrusion, and the protrusion extends into the groove to form the first circumferential limiting mechanism; in another implementation mode, the mounting hole is provided with a protrusion extending along the radial direction, the mounting part is provided with a groove matched with the protrusion, and the protrusion extends into the groove to form a first circumferential limiting mechanism; in another implementation manner, the mounting portion has a first limiting surface, the mounting hole has a second limiting surface, the first limiting surface and the second limiting surface are adapted to form a first circumferential limiting mechanism, and the first limiting surface and the second limiting surface can be flat surfaces or curved surfaces and can be designed as required.

When the second circumferential limiting mechanism is specifically realized, various implementation manners can be provided, in one implementation manner, the mounting protrusion is provided with a protrusion extending along the radial direction, the counter bore is provided with a groove matched with the protrusion, and the protrusion extends into the groove to form the second circumferential limiting mechanism; in another implementation mode, the counter bore is provided with a protrusion extending along the radial direction, the mounting protrusion is provided with a groove matched with the protrusion, and the protrusion extends into the groove to form a second circumferential limiting mechanism; in another implementation manner, the mounting protrusion has a third limiting surface, the counter bore has a fourth limiting surface, the third limiting surface is adapted to the fourth limiting surface to form a second circumferential limiting mechanism, and the first limiting surface and the second limiting surface may be planar or curved, and may be designed as required.

When the mounting protrusion is specifically arranged, the cross-sectional shape of the mounting protrusion perpendicular to the axial direction of the rod part includes a square shape, a kidney-shaped shape or a polygon shape. In this embodiment, the installation arch has the spacing effect of better circumference to be favorable to improving the fixed effect of circumference between head and the operation cap.

In a specific technical scheme, the operation cap can be a stainless steel powder metallurgy die-casting operation cap. The stainless steel powder metallurgy die-casting operation cap has higher strength and lower manufacturing cost.

Drawings

FIG. 1 is a schematic view of a screw of the prior art;

FIG. 2 is an exploded view of a screw according to an embodiment of the present application;

FIG. 3 is a schematic view of a screw in an embodiment of the present application;

fig. 4 is a schematic view of another screw in use in the embodiment of the present application.

Reference numerals:

0-optical module.

1-a rod part;

11-a threaded portion;

12-a mounting portion;

121-a first stop wall;

2-a head;

21-counter bore;

22-a straight slot;

3-fixing screws;

4-operating the cap;

41-mounting a projection;

411-a second limiting wall;

42-slotting;

5-a limiting part;

51-a pin;

52-screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, such as "one or more", unless the context clearly indicates otherwise. In the following embodiments, the terms "circumferential direction" and "axial direction" are measured with respect to a screw, the rotation direction of which is the circumferential direction, and the direction perpendicular to the circumferential direction is the axial direction.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

The screw rod that this application embodiment provided can be applied to the communication product, specifically can be applied to the fixed mounting of optical module in the communication product. In the prior art, when an optical module is installed, a screw rod and a floating nut on a single plate need to be connected to fix the optical module, for convenience of installation, the screw rod comprises a rod part and a head part, a first end of the rod part is provided with a threaded part, and the head part is installed at a second end. When the screw is used, the second end of the head of the screw is fixed with the module, the head is installed, the first end of the rod part is screwed into the floating nut of the installation part, so that the optical module is fixed, and when the screw is detached, the rotating head can be used for driving the screw to detach the optical module.

In the screw of the prior art shown in fig. 1, when the head 2 is mounted, the screw is fixed by the fixing screw 3, and in order to prevent the screw from being removed, if the head 2 is provided with a cross groove, the head 2 is removed by a cross screwdriver, the fixing screw may be removed, and the head 2 is separated from the rod 1, so that the head 2 is provided with a straight groove 22, and the cross groove cannot be formed, which makes it difficult to operate the screw by using the screwdriver in the prior art. In addition, the fixing screw may leak, which may cause an operator to malfunction.

As shown in fig. 2 and 3, fig. 2 shows a screw structure schematic diagram in the embodiment of the present application; fig. 3 shows a screw usage state diagram in an embodiment of the present application, and the embodiment of the present application provides a screw that can be applied to a fixed mounting of an optical module 0, and specifically, the screw may include a rod portion 1 and a head portion 2 that are detachably connected, where a first end of the rod portion 1 has a threaded portion 11, and a second end has a mounting portion 12, and the mounting portion 12 is connected with the head portion 2. When specifically setting up the connection structure between installation department 12 and the head 2, can make head 2 have a mounting hole (not shown in the figure), this mounting hole and installation department 12 adaptation make installation department 12 stretch into in the mounting hole, have first circumferential stop gear between installation department 12 and the mounting hole, and is specific, this first circumferential stop gear can be: the mounting part 12 is provided with a first limiting wall 121, the first limiting wall 121 is matched with a hole wall corresponding to the mounting hole, the mounting part 12 and the head part 2 can be circumferentially fixed, and the head part 2 is circumferentially rotated, so that when the head part rotates around the axis of the rod part, the head part 2 can drive the rod part 1 to circumferentially rotate; the side of the head 2 far away from the rod part 1 is provided with a counter bore 21, a mounting wall (not shown in the figure) is arranged between the counter bore 21 and the mounting hole, one side of the mounting part 12 facing the mounting wall is also provided with a threaded hole, the mounting wall is provided with a through hole or a threaded hole, and a fixing screw 3 passes through the through hole or the threaded hole of the mounting wall and is screwed into the threaded hole of the mounting part 12, so that the mounting part 12 is fixed on the mounting wall along the axial direction of the rod part 1, further the axial fixing of the rod part 1 and the head part 2 is realized, further the falling-off between the head part and the rod part can be prevented. Above-mentioned screw rod still includes the operation cap 4 with 2 fixed connection of head, this operation cap 4 is installed in above-mentioned counter bore 21, the opening that covers counter bore 21 is in order to prevent that set screw from exposing, thereby prevent that operating personnel from carrying out the maloperation to set screw 3 who connects head 2 and pole portion 1, when specifically setting up operation cap 4 and head 2, can make and have this second circumferential stop gear between operation cap 4 and the head, in order to realize that the circumference between operation cap 4 and the head is fixed, and then operating personnel can drive whole pole portion 1 rotation through head 2 when the drive operation cap 4 is rotatory around the axis of pole portion 1. In this embodiment, the operation cap 4 covers the fixing screw 3 in the counter bore 21, so that the user does not have the situation of detaching the fixing screw 3 by misoperation, which is beneficial to improving the reliability of the screw rod.

With reference to fig. 2 and fig. 3, in order to enable the screw rod to be assembled and disassembled in batch by using the screwdriver, when the operation cap 4 is specifically disposed, a slot 42 may be disposed on a side surface of the operation cap 4 away from the rod portion 1, specifically, the slot may be a cross slot, a quincuncial slot, an inner hexagonal slot or a cross slot, the slot 42 is disposed on the operation cap 4, the slot 42 has a relatively complex structure, and the screwdriver head may be limited in a plane perpendicular to an axial direction of the rod portion 1, so that the slotted operation cap 4 may rotate by using the screwdriver to drive the rod portion 1 by using the screwdriver, and therefore, the rod portion 1 in this embodiment may be assembled and disassembled by using the screwdriver, and the operation efficiency may be improved. In the embodiment shown in fig. 3 and 4, the recess 42 provided in the surface of the operating cap 4 on the side remote from the shaft 1 is embodied as a cross recess.

In particular, in order to realize the fixed mounting between the operating cap and the head, the operating cap 4 may have a mounting protrusion 41 adapted to the counterbore 21, and the second circumferential limiting mechanism is located between the mounting protrusion 41 and the counterbore 21, and specifically, the second circumferential limiting mechanism may be: the mounting protrusion 41 is provided with a second limiting wall 411, and after the mounting protrusion 41 is mounted in the counter bore 21, the mounting protrusion is matched with the corresponding bore wall of the counter bore 21, so that the circumferential fixation of the operating cap 4 and the head 2 can be realized; and then the side wall of the counter bore 21 and the side wall of the mounting boss 41 are provided with the limiting piece 5, the limiting piece 5 passes through the side wall of the counter bore 21 and the side wall of the mounting boss 41, and the axial direction of the limiting piece 5 is intersected with that of the rod part 1, namely is not parallel, so that the axial fixation of the operating cap 4 and the head part 2 can be realized.

With reference to fig. 2 and fig. 3, when the limiting member 5 is disposed, the axial direction of the limiting member 5 may be perpendicular to the axial direction of the rod portion 1, in this embodiment, the limiting effect of the limiting member 5 may be improved, and the connection reliability between the operating cap 4 and the head portion 2 may be improved.

With reference to fig. 2 and fig. 3, when the limiting member 5 is specifically disposed, the specific structure of the limiting member 5 is not specifically limited, in an optional embodiment, the limiting member 5 may be a pin 51, a screw 52 or a rivet, or may be another limiting structure.

In a specific embodiment, the limiting member 5 is a pin 51, and correspondingly, the side wall of the counterbore 21 of the head 2 and the mounting protrusion 41 of the operating cap 4 are provided with pin holes, so that the pin 51 passes through the pin holes, thereby achieving axial fixation of the head 2 and the mounting protrusion 41, and further, the circumferential fixation effect of the head 2 and the mounting protrusion 41 can be improved. When the pin 51 is specifically arranged, the pin 51 can penetrate through the side wall of the counter bore 21 of the head 2 and the mounting protrusion 41 of the operating cap 4, so that the connection between the head 2 and the operating cap 4 is more reliable, and the pin 51 can be knocked from one side to the other side conveniently to detach the pin 51.

In the specific arrangement of the pin 51, the pin 51 may be interference-fitted into the pin hole, and more specifically, the outer wall of the pin 51 may have a knurled structure, thereby improving the reliability of the connection between the pin 51 and the head 2 and the operation cap 4. It is also possible to provide the central portion of the pin 51 with a knurled structure, at least one end of the pin 51 having a light-bar portion. In this embodiment, the diameter of polished rod part is less than the diameter of pin 51 middle part annular knurl structure to during the installation, can make during polished rod inserts the pin hole earlier, can play the effect of direction, make the regional and the pin hole interference fit of pin 51 middle part annular knurl structure again, realize the installation of pin 51 and pin hole. In a specific embodiment, the two ends of the pin 51 may have the polished rod portion, so that the installation direction of the pin 51 does not need to be distinguished when the pin 51 is installed, and the installation efficiency of the pin can be improved.

Referring to fig. 4, fig. 4 is a diagram illustrating another screw rod in an embodiment of the present application. In another specific embodiment, the limiting member 5 may also be a screw 52, and the screw penetrates through the head 2 and the operating cap 4, so that the head 2 and the mounting boss 41 can be axially fixed, and further, the circumferential fixing effect of the head 2 and the mounting boss 41 can be improved. In this solution, the screw 52 is used as the limiting member 5, so as to connect the head 2 and the operation cap 4, thereby facilitating the installation and the removal. Corresponding to the screws 52, the side wall of the counter bore 21 of the head 2 and the mounting protrusion 41 of the operation cap 4 may have screw mounting holes, specifically, at least one of the screw mounting holes is a threaded hole, and the others are through holes, or both of the screw mounting holes are threaded holes, so that the screws 52 are screwed into the threaded holes, thereby completing the mounting of the screws. When only one of the screw mounting holes is a threaded hole and the rest are through holes, the manufacturing process of the head and the operating cap is simpler; when the screw mounting holes are all threaded holes, the mounting reliability of the screws is good.

With reference to fig. 4, when the screw 52 is specifically arranged, at least two side walls of the screw 52 opposite to the counter bore 21 may form a limiting structure, so as to improve the limiting effect between the head 2 and the operation cap 4. Specifically, the screw 52 may be a slotted flat-end set screw, in this embodiment, the slotted flat-end set screw 52 of the slot 42 is easy to mount and dismount, and the end of the slotted flat-end set screw does not expose the edge of the head 2, so that the external structure of the screw rod can be simplified, and the slotted flat-end set screw is not easy to be dismounted by mistake.

In another specific embodiment, the limiting member 5 may also be a rivet, and correspondingly, the side wall of the counterbore 21 of the head 2 and the mounting protrusion 41 of the operating cap 4 have rivet holes, so that the rivet is mounted in the rivet holes, thereby achieving axial fixation of the head 2 and the mounting protrusion 41, and further, the circumferential fixation effect of the head 2 and the mounting protrusion 41 may also be improved by this scheme.

When the first limiting wall 121 is specifically provided, the first limiting wall 121 may be a planar limiting wall, and the planar limiting wall is parallel to the axis of the rod portion 1, so that the planar limiting wall may be directly formed by cutting the rod portion 1 during manufacturing. In a specific embodiment, the mounting portion 12 of the rod portion 1 may have a first limiting wall 121, so that the mounting portion 12 and the head portion 2 can be circumferentially fixed. In another specific embodiment, the mounting portion 12 of the rod portion 1 may have two first limiting walls 121, and the two first limiting walls 121 are arranged in parallel, which may improve the circumferential fixing effect of the mounting portion 12 and the head portion 2.

In another embodiment, in order to realize the axial fixation of the operating cap and the head, the mounting lug of the operating cap and the counter bore of the head can be in interference fit. As the operating cap is mainly stressed in the circumferential direction when in use. Therefore, the interference fit installation can also meet the strength requirement of axial fixation. In other embodiments, according to application requirements, the operation cap can be bonded, welded or clamped with the head, and a proper fixing mode can be selected according to actual product requirements, materials and the like.

When the first circumferential limiting mechanism is specifically realized, various realization modes can be provided. In one implementation, the mounting portion has a protrusion extending in a radial direction, the mounting hole has a groove adapted to the protrusion, and specifically, the groove may have an opening facing the rod portion, so that the protrusion may extend into the groove from the opening, thereby forming a first circumferential limiting mechanism; in another implementation, the mounting hole may have a protrusion extending in a radial direction, the mounting portion may have a groove adapted to the protrusion, and the groove may have an opening facing the head portion, so that the protrusion may extend into the groove from the opening to form a first circumferential limiting mechanism; in another implementation, the mounting portion has a first limiting surface, the mounting hole has a second limiting surface, the first limiting surface and the second limiting surface are adapted to form a first circumferential limiting mechanism, the first limiting surface and the second limiting surface can be flat surfaces or curved surfaces, and when the first limiting surface and the second limiting surface are flat surfaces, the manufacturing process is simple and the limiting effect is good. When the first circumferential limiting mechanism is selected, the design can be carried out according to requirements.

When the second circumferential limiting mechanism is specifically implemented, various implementations are possible, and in one implementation, the mounting protrusion has a protrusion extending in the radial direction, and the counter bore has a groove adapted to the protrusion, specifically, the groove may have an opening facing the operating cap, so that the protrusion may extend into the groove from the opening, thereby forming the second circumferential limiting mechanism; in another implementation, the counter bore may further have a protrusion extending in a radial direction, the mounting protrusion has a groove adapted to the protrusion, and specifically, the groove may have an opening facing the head, so that the protrusion may extend into the groove from the opening to form a second circumferential limiting mechanism; in another implementation, the mounting protrusion has a third limiting surface, the counter bore has a fourth limiting surface, and the third limiting surface is adapted to the fourth limiting surface to form a second circumferential limiting mechanism. When the second circumferential limiting mechanism is selected, the design can be carried out according to requirements.

When the mounting projection 41 is specifically provided, the specific shape of the mounting projection 41 is not limited, and the cross-sectional shape of the mounting projection 41 perpendicular to the axial direction of the shaft portion 1 may be a square, a kidney circle, or a polygon. Specifically, referring to fig. 3 and 4, when the cross-sectional shape of the mounting protrusion 41 is square, the axial fixing effect between the head 2 and the operating cap 4 is good, and the manufacturing process is simple, which is beneficial to reducing the cost of the screw.

In the above embodiment, the manufacturing process of the operation cap 4 is not specifically limited, and in a specific implementation manner, the operation cap 4 may be a stainless steel powder metallurgy die-casting operation cap 4, and the stainless steel powder metallurgy die-casting process is used to manufacture the operation cap 4, so that the strength of the operation cap 4 can be improved, the manufacturing process is simple, and the cost is low.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A threaded rod comprising a rod portion, a head portion, a set screw and an operating cap, wherein:

the rod part is provided with an installation part, the head part is provided with an installation hole matched with the installation part, the installation part extends into the installation hole, and the installation part and the installation hole are circumferentially fixed through a first circumferential limiting mechanism;

a counter bore is formed in one side, far away from the rod part, of the head part, the head part and the rod part are axially fixed through the fixing screw, and a nut of the fixing screw is located in the counter bore;

the operation cap covers the opening of the counter bore and is circumferentially fixed with the head through a second circumferential limiting mechanism.

2. The screw of claim 1, wherein a mounting protrusion is arranged on a side of the operating cap facing the counterbore, and the mounting protrusion is in interference fit with the counterbore to fixedly connect the operating cap with the head.

3. The screw according to claim 1, wherein a mounting protrusion is arranged on one side of the operating cap facing the counter bore, and the side wall of the counter bore is connected with the mounting protrusion through a limiting member.

4. The screw of claim 3, wherein the retaining member comprises a pin, the counterbore side wall and the mounting boss having pin holes with axes that intersect the axis of the shank, the pin extending through the counterbore side wall and the mounting boss having pin holes to secure the head to the operator cap.

5. The screw of claim 4, wherein the outer wall surface of the pin has a knurled configuration.

6. The screw of claim 3, wherein the retainer comprises a screw, the counterbore side wall and/or the mounting boss has a threaded hole whose axial direction intersects with the axis of the shaft portion, and the screw is in threaded engagement with the counterbore side wall and the threaded hole provided in the mounting boss.

7. The screw of claim 6, wherein the screw comprises a slotted flat end set screw.

8. The screw of claim 3, wherein the retainer comprises a rivet, the counterbore sidewall and the mounting boss having rivet holes, the rivet extending through the counterbore sidewall and the mounting boss having rivet holes to secure the head to the operating cap.

9. The screw of claim 1, wherein the side of the operating cap away from the stem has a cross slot, a quincuncial slot, an internal hexagonal slot, or a cross slot.

10. The screw of claim 1, wherein the first circumferential stop mechanism comprises a protrusion at the mounting portion and a groove at the mounting hole, the protrusion fitting with the groove; alternatively, the first and second electrodes may be,

the first circumferential limiting mechanism comprises a groove positioned on the mounting part and a bulge positioned on the mounting hole, and the bulge is matched with the groove; alternatively, the first and second electrodes may be,

first circumferential limiting mechanism is including being located the first spacing face of installation department with be located the spacing face of second of mounting hole, first spacing face with the cooperation of the spacing face of second.

11. The screw of claim 1, wherein the second circumferential stop mechanism comprises a projection on the mounting boss and a groove on the counterbore, the projection mating with the groove; alternatively, the first and second electrodes may be,

the second circumferential limiting mechanism comprises a groove positioned on the mounting boss and a boss positioned on the counter bore, and the boss is matched with the groove; alternatively, the first and second electrodes may be,

the second circumferential limiting mechanism comprises a third limiting plane positioned on the mounting protrusion and a fourth limiting plane positioned on the counter bore, and the third limiting plane is matched with the fourth limiting plane.

12. The screw of claim 11, wherein the mounting boss has a cross-sectional shape perpendicular to the axial direction of the shank portion that includes a square shape, a kidney-round shape, or a polygonal shape.

13. The screw of any one of claims 1 to 12, wherein the operating cap comprises a stainless steel powder metallurgy die cast operating cap.