Stainless steel connecting fastener

Abstract

The utility model relates to the technical field of fasteners, in particular to a stainless steel connecting fastener which comprises a bolt body and a nut, the nut comprises a positioning pin and a check block detachably connected with the positioning pin, a threaded hole is formed in the end, away from the positioning pin, of the check block, a mounting groove is formed in the other end of the check block, and an oil injection hole is formed in the bottom of the mounting groove. The stainless steel connecting fastener has the advantages that oil can be conveniently injected, the fastener can be lubricated, the heat generation and adhesion phenomena are reduced, and therefore the disassembly difficulty is lowered.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a stainless steel connecting fastener. Background Technology

[0002] Stainless steel fasteners, due to their material properties, have excellent corrosion resistance and are typically used for fastening expensive machine parts. Bolts, studs, and nuts are the most widely used stainless steel fasteners.

[0003] For example, a stainless steel connecting fastener with publication number "CN219888473U" includes a bolt body and a nut. The nut includes a locating pin, and a stop is fixedly connected to one end of the locating pin. A threaded hole is opened at the end of the stop away from the locating pin, and the threaded hole is threadedly connected to the bolt body, so that one end of the bolt body will not protrude outward, thereby avoiding the problem of one end of the bolt body being exposed to the outside and potentially damaging the bolt body.

[0004] However, the aforementioned document lacks an oil filling structure between the bolt and nut, which means that if the bolt and nut lock up during use, disassembly becomes extremely difficult. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a stainless steel connecting fastener that is easy to inject oil to lubricate the fastener, reduce heat generation and adhesion, and thus reduce the difficulty of disassembly, in order to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stainless steel connecting fastener, comprising a bolt body and a nut, characterized in that: the nut comprises a positioning pin and a stop block detachably connected to the positioning pin, the stop block having a threaded hole at one end away from the positioning pin and an installation groove at the other end, the bottom of the installation groove having an oil injection hole, and the oil injection hole communicating with the threaded hole, and the bottom of the positioning pin having an installation block that inserts into the installation groove.

[0007] The above technical solution, compared with the lack of an oil injection structure in the prior art, allows the positioning pin and the stop block to be detached. When oil injection is required, the positioning pin can be removed and lubricating oil can be injected through the oil injection hole. This lubricates the threaded connection between the threaded hole and the bolt body, reducing heat generation and adhesion during disassembly and lowering the difficulty of disassembly.

[0008] A further feature of this invention is that: the outer wall of the mounting block is provided with at least two mounting cavities, a limiting ball is slidably provided in the mounting cavity, an elastic element is provided between the limiting ball and the mounting cavity, one end of the elastic element abuts against the mounting cavity, and the other end abuts against the limiting ball, and a limiting groove is provided on the inner wall of the mounting groove for the limiting ball to engage.

[0009] Using the above technical solution: During use, after oiling is completed, the oiling hole needs to be covered to prevent dust or foreign objects from entering. At this time, after the mounting block is aligned with the mounting groove and inserted, the limiting ball abuts against the inner wall of the mounting groove and is compressed into the mounting cavity. At this time, the elastic element is compressed. When the positioning pin is inserted downward to a certain position, the limiting ball is located in the limiting groove on the inner wall of the mounting groove. At this time, the force compressing the limiting ball disappears, and the elastic element drives the limiting ball to reset, so that the limiting ball is stuck in the limiting groove, realizing the connection between the positioning pin and the stop block. At the same time, when disassembling, you only need to pull the positioning pin outward with force. Due to the arc surface setting of the limiting ball and the limiting groove, when the positioning pin is pulled upward, the radial force generated at the contact point can compress the limiting ball, thereby causing the limiting ball to disengage from the limiting groove.

[0010] A further feature of this invention is that the outer wall of the block is provided with a plurality of protrusions along its circumference, and the protrusions are evenly distributed at intervals.

[0011] The above technical solution allows the protruding strip to increase the friction between the outer wall of the block and the hole in the item when the block is inserted into the hole, preventing the block from rotating inside the hole and affecting the installation effect.

[0012] A further feature of this invention is that a first washer is provided between the positioning pin and the stop block. The first washer is located at the bottom of the positioning pin, and a first through hole is provided in the middle of the first washer for the stop block to pass through. A first soft pad is provided on the side of the first washer near the stop block.

[0013] The above technical solution is adopted: the first gasket is set to prevent loosening, and the first gasket is provided with a first soft pad to prevent scratching the outer surface of the item. At the same time, the first through hole is set to facilitate installation with the stop block.

[0014] A further feature of this invention is that the bolt body includes a bolt head and a screw connected to the bolt head. The bolt has a threaded portion that is adapted to the threaded hole. A second washer is provided on the side of the bolt head near the screw. The second washer has a second through hole for the screw to pass through. A second soft pad is provided on the side of the second washer near the screw.

[0015] The above technical solution is adopted: the screw is threadedly connected to the threaded part in the stop block to fix the item, while ensuring that one end of the screw does not protrude outwards, thus avoiding the bolt being exposed. In addition, the second washer is provided to prevent loosening, and the second washer is provided with a second soft pad to prevent scratching the outer surface of the item.

[0016] A further feature of this invention is that the end of the screw away from the bolt head is provided with a chamfer, and the stop block located at the opening of the threaded hole is provided with a chamfer corresponding to the chamfer.

[0017] The above technical solution is adopted: by setting the chamfered part and the chamfer, a self-aligning structure is formed. During installation, when the screw is inserted into the threaded hole, the chamfered part and the chamfer guide each other, and it can be easily inserted without precise alignment, which improves installation efficiency, simplifies the installation process, and reduces alignment time.

[0018] A further feature of this invention is that a hexagonal groove is provided on the end of the bolt head away from the screw, and a slot is formed inside the hexagonal groove.

[0019] The above technical solution allows for the use of hexagonal and flathead screwdrivers to disassemble bolts when disassembly is required, enabling the use of multiple disassembly tools.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is an exploded view of the present invention.

[0024] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0025] Figure 5 This is a schematic diagram of the stop block structure of this utility model.

[0026] Figure 6 These are structural schematic diagrams of the fastener of this utility model from different perspectives.

[0027] Labeling Explanation: Bolt body 1, Bolt head 11, Hexagonal groove 111, Slotted groove 112, Screw 12, Threaded part 121, Chamfered part 122, Nut 2, Locating pin 21, Mounting block 212, Mounting cavity 212a, Limiting ball 212b, Elastic element 212c, Stop block 22, Threaded hole 221, Mounting groove 222, Oil injection hole 222a, Limiting groove 222b, Raised bar 223, Chamfer 224, First washer 3, Second washer 4, Item 5. Detailed Implementation

[0028] In the accompanying drawings of this specific embodiment and the disclosed embodiments, only the structures involved in the disclosed embodiments are involved. Other structures can be referred to with ordinary design. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of this utility model, they are protected by patent law.

[0029] like Figure 1-6 The stainless steel fastener shown includes a bolt body 1 and a nut 2. The nut 2 includes a locating pin 21 and a stop block 22 detachably connected to the locating pin 21. The stop block 22 has a threaded hole 221 at one end away from the locating pin 21 and an installation groove 222 at the other end. The bottom of the installation groove 222 has an oil injection hole 222a, which is connected to the threaded hole 221. The bottom of the locating pin 21 has an installation block 212 that is inserted into the installation groove 222.

[0030] like Figure 3-4 The mounting block 212 shown has at least two mounting cavities 212a on its outer wall. A limiting ball 212b is slidably disposed in the mounting cavity 212a. An elastic element 212c is disposed between the limiting ball 212b and the mounting cavity 212a. One end of the elastic element 212c abuts against the mounting cavity 212a and the other end abuts against the limiting ball 212b. A limiting groove 222b is provided on the inner wall of the mounting groove 222 for the limiting ball 212b to engage.

[0031] like Figure 3 The outer wall of the block 22 shown has several protrusions 223 along its circumference, and the protrusions 223 are evenly distributed. For example... Figure 3 A first washer 3 is provided between the positioning pin 21 and the stop block 22. The first washer 3 is located at the bottom of the positioning pin 21, and a first through hole is provided in the middle of the first washer 3 for the stop block 22 to pass through. A first soft pad is provided on the side of the first washer 3 near the stop block 22.

[0032] like Figure 3The bolt body 1 shown includes a bolt head 11 and a screw 12 connected to the bolt head 11. The bolt is provided with a threaded portion 121 that is adapted to the threaded hole 221. A second washer 4 is provided on the side of the bolt head 11 near the screw 12. The second washer 4 is provided with a second through hole for the screw 12 to pass through. A second soft pad is provided on the side of the second washer 4 near the screw 12.

[0033] like Figure 2 The screw 12 shown has a chamfered portion 122 at the end away from the bolt head 11, and the stop block 22 has a chamfered portion 224 corresponding to the chamfered portion 122 at the opening of the threaded hole 221. Figure 6 The bolt head 11 shown has a hexagonal groove 111 on the end away from the screw 12, and a slot 112 is formed in the hexagonal groove 111.

[0034] In use, compared with the prior art which lacks an oiling structure, this utility model, by detachably setting the positioning pin 21 and the stop block 22, allows for easy oiling by simply removing the positioning pin 21 and injecting lubricating oil through the oiling hole 222a. This lubricates the threaded connection between the threaded hole 221 and the bolt body 1, reducing heat generation and adhesion during disassembly and simplifying the process. After oiling, the oiling hole 222a needs to be covered to prevent dust or foreign objects from entering. When the mounting block 212 is inserted into the mounting groove 222, the limiting ball 212b abuts against the inner wall of the mounting groove 222 and is compressed into the mounting cavity 212a. Inside, the elastic element 212c is compressed. When the positioning pin 21 is inserted downward to a certain position, the limiting ball 212b is located in the limiting groove 222b on the inner wall of the mounting groove 222. At this time, the force compressing the limiting ball 212b disappears, and the elastic element 212c drives the limiting ball 212b to reset, so that the limiting ball 212b is stuck in the limiting groove 222b, realizing the connection between the positioning pin 21 and the stop block 22. At the same time, when disassembling, you only need to pull the positioning pin 21 outward with force. Due to the arc surface setting of the limiting ball 212b and the limiting groove 222b, when the positioning pin is pulled upward, the radial force generated at the contact point can compress the limiting ball 212b, thereby causing the limiting ball 212b to disengage from the limiting groove 222b.

Claims

1. A stainless steel connection fastener comprising a bolt body and a nut, characterized by: The nut includes a locating pin and a stop block detachably connected to the locating pin. The stop block has a threaded hole at one end away from the locating pin and an installation groove at the other end. The bottom of the installation groove has an oil injection hole, and the oil injection hole is connected to the threaded hole. The bottom of the locating pin has an installation block that is inserted into the installation groove.

2. The stainless steel connecting fastener according to claim 1, characterized in that: The outer wall of the mounting block is provided with at least two mounting cavities. A limiting ball is slidably provided in the mounting cavity. An elastic element is provided between the limiting ball and the mounting cavity. One end of the elastic element abuts against the mounting cavity and the other end abuts against the limiting ball. A limiting groove is provided on the inner wall of the mounting groove for the limiting ball to engage.

3. A stainless steel connecting fastener according to claim 2, characterized in that: The outer wall of the block is provided with a number of protrusions along its circumference, and the protrusions are evenly distributed at intervals.

4. A stainless steel connecting fastener according to claim 3, characterized in that: A first washer is provided between the positioning pin and the stop block. The first washer is located at the bottom of the positioning pin, and a first through hole is opened in the middle of the first washer for the stop block to pass through. A first soft pad is provided on the side of the first washer near the stop block.

5. A stainless steel connecting fastener according to claim 1, characterized in that: The bolt body includes a bolt head and a screw connected to the bolt head. The bolt has a threaded portion that is adapted to the threaded hole. A second washer is provided on the side of the bolt head near the screw. The second washer has a second through hole for the screw to pass through. A second soft pad is provided on the side of the second washer near the screw.

6. A stainless steel connecting fastener according to claim 5, characterized in that: The screw has a chamfered portion at the end away from the bolt head, and the stop block has a chamfer corresponding to the chamfered portion at the opening of the threaded hole.

7. A stainless steel connecting fastener according to claim 6, characterized in that: The bolt head has a hexagonal groove at the end away from the screw, and a slot is formed inside the hexagonal groove.

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