Wear-resistant and corrosion-resistant screw rod

Abstract

The utility model discloses a wear-resistant corrosion-resistant screw rod, which comprises a screw rod body, the screw rod body comprises a screw hole section, a thread section and an expansion section, an inner hole is formed in the gravity center of the screw rod body in a penetrating manner, the inner hole penetrates through the screw hole section, the thread section and the expansion section, an inner screw rod is connected in the inner hole, a plurality of split grooves are formed in the expansion section, and the split grooves are formed in the expansion section. The expansion section comprises a plurality of split subsections, the subsections are combined to form the expansion section, internal threads are arranged on the inner sides of the subsections, and the internal threads are matched and connected with the external threads of the inner screw rod; accurate expansion is achieved through cooperation of the inner screw and the expansion section, the abrasion resistance and corrosion resistance are enhanced, through flexible and diversified fastening modes and the controllable expansion function, the stability of the connecting portion is enhanced, the reliability of the overall structure is guaranteed, the defects of a traditional screw in the aspects of abrasion resistance, corrosion resistance, fastening modes and the expansion function are effectively overcome, and the service life of the screw is prolonged. And diversified requirements of modern industrial production and engineering construction can be better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw technology field especially relates to a wear -resisting corrosion -resistant screw. BACKGROUND

[0002] In the field of screw application, screw as a kind of basic and key mechanical parts, is widely used in architecture, machinery manufacturing, chemical industry, food processing and many other industries.In the field of construction, screw is often used to connect and fix building structure components, to ensure the stability of building;In machinery manufacturing, screw can realize accurate transmission and positioning function, and is an important guarantee for the normal operation of various mechanical equipment;In chemical industry, screw plays a key role in conveying, stirring and other process links;In food processing equipment, screw is also used for material conveying and forming.

[0003] However, the existing screw has some deficiencies in practical application.Firstly, the wear resistance and corrosion resistance are poor;In some harsh working environments, such as corrosive medium in chemical production, or high friction working conditions in machinery manufacturing, screw is easy to be corroded or worn, which leads to short service life, frequent replacement of screw not only increases cost, but also affects production efficiency;Secondly, the fastening mode of traditional screw is relatively single, and the adaptability is not strong;For some special installation scene or part needing special fastening effect, traditional screw is difficult to meet the demand, and cannot provide enough fastening force or realize flexible fastening adjustment

[0004] In summary, the existing screw has deficiencies, and needs to be improved to adapt to the diversified needs of modern industrial production and engineering construction. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of wear -resisting corrosion -resistant screw to overcome the deficiencies in prior art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] The application discloses a kind of wear -resisting corrosion -resistant screw, including screw body, the screw body includes screw hole section, thread section and expansion section, the screw body gravity center is through and is provided with inner hole, the inner hole passes through the screw hole section, thread section and expansion section, inner screw is connected in the inner hole, expansion section is provided with a plurality of split grooves, expansion section includes a plurality of split segments, the segment is combined to form the expansion section, the inner side of the segment is provided with internal thread, the internal thread is matched with the external thread of the inner screw and is connected.

[0008] As preferred, the inner wall of the expansion section is conical, the end of the expansion section away from the screw hole section is conical, and the inner screw extends into and approaches the expansion section to drive the expansion section to extend outward.

[0009] As preferred, the screw body is connected with a mounting shell outside, the mounting shell is connected with the threaded segment of the screw body, and a contact end is arranged in the mounting shell and connected with one end of the inner screw.

[0010] As preferred, an expansion slot is arranged on the mounting shell and opposite to the expansion segment, and an expansion moving part is movably arranged in the expansion slot and detachably connected with the outside of the mounting shell.

[0011] As preferred, a mounting thread is arranged outside the threaded segment, and a matched thread is arranged on the mounting shell and matched and connected with the mounting thread.

[0012] As preferred, an expansion sleeve ring is arranged outside the expansion segment and wrapped around the expansion segment, and the expansion sleeve ring is extended with the expansion of the expansion segment when the expansion segment is expanded due to the movement of the inner screw.

[0013] The utility model discloses the beneficial effects of the following:

[0014] (1), realize accurate expansion through the cooperation of inner screw and expansion segment, enhance the wear resistance and corrosion resistance, through flexible and various fastening mode and controllable expansion function, enhance the stability of connecting position, guarantee the reliability of overall structure and so on benefit, effectively solve the deficiency of traditional screw in wear resistance and corrosion resistance, fastening mode and expansion function, better adapt to the diversification demand of modern industrial production and engineering construction.

[0015] The features and advantages of the utility model will be described in detail through embodiments combined with the drawings. DRAWINGS

[0016] Fig. 1 is the three-dimensional structure schematic diagram of the embodiment of the wear-resistant and corrosion-resistant screw of the utility model;

[0017] Fig. 2 is the plane structure cross section schematic diagram of the embodiment of the utility model;

[0018] Fig. 3 is the three-dimensional structure cross section schematic diagram of part structure of the embodiment of the utility model;

[0019] In the drawing: 1, screw body;101, screw hole segment;1011, inner hole;102, threaded segment;1021, mounting thread;103, expansion segment;1031, subsection;1032, split slot;1033, expansion sleeve ring;2, inner screw;3, mounting shell;301, expansion slot. DETAILED DESCRIPTION

[0020] For the purpose, technical scheme and advantages of the utility model to be clearer and more obvious, the following through the drawing and example, the utility model is further explained in detail. But it should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0021] Referring to Figs. 1-3 The utility model discloses a kind of wear-resistant corrosion-resistant screw rods, screw body 1 includes screw hole section 101, threaded section 102 and expansion section 103, overall is slender hollow rod, sleeve, central position is opened with inner hole 1011 along axial direction, this inner hole 1011 is in turn through screw hole section 101, threaded section 102 and expansion section 103.

[0022] Screw hole section 101 is located at one end of screw body 1, mainly used to be connected with external parts by bolt etc. connecting piece, this part is equipped with screw hole structure suitable for bolt.

[0023] Threaded section 102 is located at intermediate portion of screw body 1, and the outside is provided with mounting thread 1021, for being connected and fixed with mounting shell 3.

[0024] Expansion section 103 is located at one end of screw body 1 away from screw hole section 101, its inner wall is conical, and the end away from screw hole section 101 is the top of the cone. Expansion section 103 is evenly provided with a plurality of split grooves 1032 along the circumferential direction, which divides the expansion section 103 into a plurality of segments 1031, and the inner side of the segment 1031 is processed with internal thread. In addition, expansion sleeve ring 1033 is sleeved on the outer side of expansion section 103, which is made of soft rubber material. The purpose is to extend the expansion of the expansion section 103 and evenly stretch. After the expansion of the expansion section 103, the expansion sleeve ring 1033 extends, which enhances the overall strength of the expansion section 103, prevents structural damage caused by excessive expansion, and assists the expansion section 103 to evenly apply expansion force to the surrounding, improving the stability of the expansion effect.

[0025] Inner screw 2 is slender threaded rod, and the external thread is matched with the internal thread on the inner side of the segment 1031 of expansion section 103. The inner screw 2 passes through the inner hole 1011 of the screw body 1, and one end is close to the top of the cone of the expansion section 103.

[0026] Mounting shell 3 is in the form of a cylinder, and is sleeved on the outer side of the threaded section 102 of the screw body 1. The inner wall of the mounting shell 3 is provided with a matching screw thread that matches the mounting thread 1021 of the threaded section 102, thereby achieving a tight connection between the two. The mounting shell 3 is internally provided with a contact end at one end, which is in contact with one end of the inner screw 2.

[0027] Meanwhile, the mounting shell 3 is provided with an expansion groove 301 at a position corresponding to the expansion section 103, and an expansion moving part is movably arranged in the expansion groove 301, and the expansion moving part is detachably connected to the outside of the mounting shell 3, and the expansion moving part comprises an expansion nail, a clamping block and the like.

[0028] The mounting shell 3 is used as an intermediate structure for connection and operation, and the relative position relationship between the inner screw rod 2 and the screw rod body 1 is fixed through the connection with the threaded section 102. The contact end inside is used for transmitting the operation force of the outside to the inner screw rod 2, so that the inner screw rod 2 can move in the inner hole 1011. The expansion groove 301 and the expansion moving part provide a way for the operator to control the expansion of the expansion section 103 from the outside, and the detachable connection mode is convenient for adjustment or replacement according to actual needs.

[0029] Working process

[0030] The mounting shell 3 is screwed with the mounting thread 1021 of the threaded section 102 of the screw rod body 1 through the matching thread, and the mounting shell 3 is rotated to move along the threaded section 102 to the appropriate position, and the connection between the mounting shell 3 and the screw rod body 1 is completed.

[0031] The inner screw rod 2 is moved in the inner hole 1011 to the expansion section 103, and with the movement of the inner screw rod 2, the outer thread interacts with the inner thread of the segmented section 1031, and due to the taper of the inner wall of the expansion section 103, the axial movement of the inner screw rod 2 promotes the segmented section 1031 to expand and extend outward along the split groove 1032; in this process, the expansion sleeve ring 1033 is synchronously extended, helping the expansion section 103 to uniformly apply expansion force to the surrounding structure, tightly fit the surrounding structure, realize expansion fastening, enhance the connection stability of the screw and the mounting position, and further reinforce the connection stability of the mounting shell 3 and the outside through the expansion moving part.

[0032] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wear and corrosion resistant screw, characterized by: The utility model provides a screw rod body (1) including screw hole section (101), thread section (102) and expansion section (103), the screw rod body (1) gravity passes through and is set up with inner hole (1011), the inner hole (1011) passes through screw hole section (101), thread section (102) and expansion section (103), the inner hole (1011) is connected with inner screw rod (2), expansion section (103) is set up with a plurality of split slots (1032), expansion section (103) includes a plurality of split segments (1031), the segment (1031) is combined to form expansion section (103), the inner side of segment (1031) is equipped with internal thread, and the internal thread is connected with the external thread of inner screw rod (2) cooperation.

2. A wear and corrosion resistant screw as claimed in claim 1, wherein: The inner wall of the expansion section (103) is conical, and the end of the expansion section (103) away from the screw hole section (101) is a conical tip. When the inner screw rod (2) extends into and approaches the expansion section (103), the expansion section (103) is driven to extend outward.

3. A wear and corrosion resistant screw as defined in claim 1, wherein: The screw rod body (1) is connected with a mounting shell (3) on the outside, and the mounting shell (3) is connected with the thread section (102) of the screw rod body (1). The mounting shell (3) is provided with a contact end inside, and the contact end is connected with one end of the inner screw rod (2).

4. A wear and corrosion resistant screw as claimed in claim 3, wherein: The mounting shell (3) is provided with an expansion slot (301) on the outside, and the expansion slot (301) is opposite to the expansion section (103). The expansion slot (301) is movably provided with an expansion moving part, and the expansion moving part is detachably connected with the outside of the mounting shell (3).

5. A wear and corrosion resistant screw as defined in claim 3, wherein: The thread section (102) is provided with a mounting thread (1021) on the outside, and the mounting shell (3) is provided with a matching thread. The mounting thread (1021) is connected with the matching thread.

6. A wear and corrosion resistant screw as defined in claim 1, wherein: The expansion section (103) is provided with an expansion sleeve ring (1033) on the outside, and the expansion sleeve ring (1033) wraps the expansion section (103). When the expansion section (103) expands due to the movement of the inner screw rod (2), the expansion sleeve ring (1033) expands with the expansion of the expansion section (103).

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