CN217152596U - Two-way screw fastening mechanism - Google Patents
Two-way screw fastening mechanism Download PDFInfo
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- CN217152596U CN217152596U CN202123104280.5U CN202123104280U CN217152596U CN 217152596 U CN217152596 U CN 217152596U CN 202123104280 U CN202123104280 U CN 202123104280U CN 217152596 U CN217152596 U CN 217152596U
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- mortise
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- wedge
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Abstract
The utility model discloses a two-way screw fastening mechanism, which comprises a stepped screw, a mortise and tenon wedge, a first nut, a second nut and a gasket, wherein the stepped screw comprises a first-step screw matched with the first nut and a second-step screw matched with the second nut, the screwing directions of the first-step screw and the second-step screw are opposite, the first nut is provided with a first nut mortise and tenon mounting hole along the axial direction, the second nut is provided with a second nut mortise and tenon mounting hole along the axial direction, the side part of the first nut is provided with a mortise and tenon opening, the side part of the second nut is provided with a second nut opening, the mortise and tenon wedge comprises a mortise and tenon wedge body, the side part of the mortise and tenon wedge body is provided with a first wedge and a second wedge, after the mortise and tenon wedge is arranged into the first nut mortise and tenon mounting hole and the second mortise mounting hole, the first oblique wedge block can form mortise and tenon joint fit with the mortise and tenon joint opening, and has a trace amount of interference fit. The utility model discloses a two-way screw thread fastening structure combines tenon fourth of twelve earthly branches tapered wedge locking device, can not take place not hard up receiving the impact vibrations down, and the locking reliability is high.
Description
Technical Field
The utility model belongs to the technical field of the fastener, especially, relate to a two-way screw thread fastening device.
Background
At present, a common thread fastening structure is that a standard one-way coarse thread piece penetrates through two or more connected pieces, then the two or more connected pieces are connected and fastened in a matched mode through nuts and bolts or screws, and the fastening piece rotates in a one-way mode during assembly and is fastened through pretightening force. Such a screw fastening structure is not highly reliable in a state where vibration intensity is large and vibration is frequent. Especially, when a fastener made of a low-strength material is adopted, due to the fact that the material is soft, thread slipping is easily caused by excessive pretightening force, and the unidirectional thread matching structure is easily loosened under frequent vibration frequency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel two-way screw fastening mechanism can carry out quick fastening and dismantlement through conventional instrument, equipment, need not purpose-made instrument, equipment, easy operation, and fastening structure is firm, reliable to there is certain flexible flexibility.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a bidirectional screw fastening mechanism comprises a stepped screw, a mortise and tenon wedge, a first nut, a second nut and a gasket,
the stepped screw comprises a first-order thread matched with a first nut and a second-order thread matched with a second nut, the screwing directions of the first-order thread and the second-order thread are opposite, a first nut mortise and tenon mounting hole is formed in the first nut along the axial direction, a second nut mortise and tenon mounting hole is formed in the second nut along the axial direction, a mortise and tenon opening is formed in the lateral portion of the first nut, a second nut opening is formed in the lateral portion of the second nut, the mortise and tenon wedge comprises a mortise and tenon wedge body, a first wedge block and a second wedge block are arranged on the lateral portion of the mortise and tenon wedge body, the tenon and mortise wedge block rotates by a preset angle after being installed into the first nut mortise and tenon mounting hole and the second nut mortise and tenon mounting hole, and tenon-mortise cooperation can be formed between the first wedge block and the mortise and tenon opening.
Furthermore, the surface of the mortise and tenon opening is provided with a first wedge surface, and the end surface of the first wedge opposite to the first wedge surface is provided with a second wedge surface matched with the first wedge surface.
Furthermore, after the tenon-and-mortise tapered wedge is installed in the first nut tenon-and-mortise mounting hole and the second nut tenon-and-mortise mounting hole, the first tapered wedge surface and the second tapered wedge surface can form tenon-and-mortise fit after rotating by 90 degrees.
Further, a relief groove is arranged between the first-step thread and the second-step thread.
Further, the gasket is installed in the tool withdrawal groove.
Furthermore, the number of the mortise and tenon wedges is multiple.
Furthermore, the top end face of the mortise and tenon wedge is provided with an inner hexagonal wrench hole.
Furthermore, the first wedge blocks and the second wedge blocks respectively comprise two first wedge blocks and two second wedge blocks which are respectively and symmetrically arranged on two sides of the mortise and tenon wedge body.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) when the mechanism is used for locking the connected piece, special tools are not needed, and conventional tools are only needed;
(2) the locking mechanism has the working mode that the bidirectional thread fastening structure is combined with the tenon-mortise inclined wedge locking device, so that the locking mechanism cannot be loosened under impact vibration and has extremely high locking reliability;
(3) the mechanism is particularly suitable for a fastening mechanism made of low-strength materials which cannot bear overlarge pretightening force.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is the installation schematic diagram of the two-way screw fastening mechanism of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
FIG. 3 is a schematic view of a stepped screw structure.
Fig. 4 is a schematic perspective view of the first nut.
Fig. 5 is a front view of the first nut.
Fig. 6 is a side view of the first nut.
Fig. 7 is a schematic view of a three-dimensional structure of a mortise and tenon wedge.
Fig. 8 is a first perspective view of the mortise and tenon wedge.
Fig. 9 is a second perspective view of the mortise and tenon wedge.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
With reference to fig. 1-9, a bidirectional screw fastening mechanism comprises a stepped screw 1, a mortise and tenon wedge 2, a first nut 3, a second nut 5 and a gasket 4,
the stepped screw 1 comprises a first-step thread 10 matched with a first nut 3 and a second-step thread 11 matched with a second nut 5, the screwing directions of the first-step thread 10 and the second-step thread 11 are opposite, a first nut mortise and tenon mounting hole 30 is axially formed in the first nut 3, a second nut mortise and tenon mounting hole is axially formed in the second nut 5, a first inclined wedge block 20 and a second inclined wedge block 22 are arranged on the side portion of the first nut 3, a second nut opening is formed in the side portion of the second nut 5, the mortise and tenon inclined wedge 2 comprises a mortise and tenon inclined wedge body 24, a first inclined wedge block 20 and a second inclined wedge block 22 are arranged on the side portion of the mortise and tenon inclined wedge body 24, the mortise and tenon inclined wedge 2 is rotated by a preset angle after being arranged in the first nut mortise and tenon mounting hole 30 and the second nut mortise mounting hole, the first inclined wedge block 20 can form inclined fit with a wedge face 32 at the position of the mortise and tenon opening 31, and has a slight interference fit.
Specifically, with reference to fig. 4 to 6, a first wedge surface 32 is disposed on a surface of the mortise and tenon opening 31, an end surface of the first wedge 20 opposite to the first wedge surface 32 is configured as a second wedge surface 21 matched with the first wedge surface 32, and the second nut 5 may also be configured as the first nut 3.
Specifically, after the mortise and tenon tapered wedge 2 is installed in the first nut mortise and tenon mounting hole 30 and the second nut mortise and tenon mounting hole, the first tapered wedge face 32 can form mortise and tenon matching with the second tapered wedge face 21 by rotating 90 degrees.
Specifically, a relief groove 12 is provided between the first step thread 10 and the second step thread 11 to isolate the first step thread 10 from the second step thread 11.
Specifically, the shim 4 is mounted in the relief groove 12.
Specifically, the number of the mortise and tenon tapered wedges 2 is multiple.
Specifically, the top end face of the mortise and tenon wedge 2 is provided with an inner hexagonal wrench hole 23.
Specifically, with reference to fig. 7 to 9, the first tapered wedge 20 and the second tapered wedge 22 respectively include two first tapered wedges 20 and two second tapered wedges 22, and the two first tapered wedges 20 and the two second tapered wedges 22 are respectively symmetrically disposed on two sides of the mortise and tenon tapered wedge body 24.
During assembly, the stepped screw penetrates into the first connected piece 6 and the second connected piece 7, the large-diameter second nut 5 is screwed into the second-step thread 11, then the adjusting clamping gasket 4 is installed, and then the small-diameter first nut 3 is installed to clamp the whole mechanism. The number of the adjusting gaskets 4 can be increased or decreased according to the size of the connected piece. The nut is fastened and then is loaded into the mortise and tenon tapered wedge 2, an inner hexagonal wrench is adopted to rotate the mortise and tenon tapered wedge for 90 degrees, the longitudinal degree of freedom is locked in the long dimension direction of the mortise and tenon position, the second tapered wedge surface 21 and the first tapered wedge surface 32 of the first nut are mutually tightly matched to limit the transverse degree of freedom, the whole structure is quite firm, and the quantity of the mortise and tenon tapered wedges 2 can be increased to 2-6 according to the fastening requirement. When unlocking, firstly adopting an inner hexagonal wrench to loosen the mortise and tenon wedge 2 in the opposite direction, then unlocking the small-diameter nut in sequence, taking out the adjusting clamping gasket, and finally unlocking the large-diameter nut. The whole fastening system is disassembled.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A bidirectional screw fastening mechanism is characterized by comprising a stepped screw (1), a mortise and tenon wedge (2), a first nut (3), a second nut (5) and a gasket (4),
the stepped screw (1) comprises a first-step thread (10) matched with a first nut (3) and a second-step thread (11) matched with a second nut (5), the screwing directions of the first-step thread (10) and the second-step thread (11) are opposite, a first nut mortise and tenon mounting hole (30) is formed in the first nut (3) along the axial direction, a second nut mortise and tenon mounting hole is formed in the second nut (5) along the axial direction, a mortise and tenon opening (31) is formed in the side portion of the first nut (3), a second nut opening is formed in the side portion of the second nut (5), the mortise and tenon wedge (2) comprises a mortise and tenon wedge body (24), a first wedge block (20) and a second wedge block (22) are arranged in the side portion of the mortise and tenon wedge body (24), and the mortise and tenon wedge (2) is installed in the first mortise and tenon mounting hole (30) and the second mortise mounting hole, and when the first inclined wedge block (20) rotates by a preset angle, the first inclined wedge block and the mortise and tenon opening (31) can form mortise and tenon joint matching.
2. The mechanism of claim 1, wherein the surface of the mortise and tenon opening (31) is provided with a first wedge surface (32), and the end surface of the first wedge (20) opposite to the first wedge surface (32) is provided with a second wedge surface (21) matched with the first wedge surface (32).
3. The two-way threaded fastening mechanism according to claim 2, wherein the mortise and tenon wedge (2) is rotated 90 degrees after being installed in the first nut mortise and tenon mounting hole (30) and the second nut mortise and tenon mounting hole, and the first wedge surface (32) and the second wedge surface (21) can form mortise and tenon matching.
4. A mechanism according to claim 3, wherein a relief (12) is provided between the first step thread (10) and the second step thread (11).
5. The mechanism according to claim 4, characterized in that the shim (4) is mounted in the undercut (12).
6. The mechanism according to claim 1, characterized in that said tapered mortise and tenon wedges (2) are plural in number.
7. The bidirectional threaded fastening mechanism according to claim 1, wherein the top end face of the mortise and tenon wedge (2) is provided with a hexagon socket wrench hole (23).
8. The tightening mechanism according to claim 1, characterized in that the first and second wedges (20, 22) are two, and the two first and second wedges (20, 22) are symmetrically disposed on two sides of the mortise and tenon wedge body (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123104280.5U CN217152596U (en) | 2021-12-11 | 2021-12-11 | Two-way screw fastening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123104280.5U CN217152596U (en) | 2021-12-11 | 2021-12-11 | Two-way screw fastening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217152596U true CN217152596U (en) | 2022-08-09 |
Family
ID=82684714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123104280.5U Active CN217152596U (en) | 2021-12-11 | 2021-12-11 | Two-way screw fastening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217152596U (en) |
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2021
- 2021-12-11 CN CN202123104280.5U patent/CN217152596U/en active Active
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