A kind of anti-vibration bolt and its manufacturing method

Abstract

The present invention discloses an anti-seismic bolt, comprising a screw rod and an expansion sleeve, the screw rod can be screwed together with the expansion sleeve, the front end of the screw rod is provided with an extrusion block, the middle part of the screw rod is connected with a pawl, the rear part of the screw rod is provided with a thread, the front end of the expansion sleeve is provided with a slit, the expansion sleeve is provided with an extrusion rotating mechanism, and the extrusion rotating mechanism is connected with the screw rod. When an earthquake occurs, the wall shakes and the pressing block can be pressed, so that the pressing block undergoes a process of retraction and extension. During the retraction of the pressing block, the screw rod can be driven to rotate, so that the extrusion block at the front end of the screw rod further expands the expansion sleeve, and the expansion sleeve generates an extrusion force on the wall to prevent the expansion sleeve from loosening. The greater the intensity of the earthquake, the greater the extrusion force generated by the expansion sleeve on the wall.

Description

Technical Field

[0001] The present invention relates to the technical field of bolts, and in particular to a shockproof bolt and a manufacturing method thereof. Background Art

[0002] In the field of construction or machinery, connecting bolts for various machines are indispensable. Bolts are mainly used to fix two objects. The bolts currently used include a screw head and a screw rod set under the screw head. In earthquake-prone areas, we find that the bolts connected to the wall often detach with the vibration, causing great losses to people. Cracks are formed around the bolt holes left after the bolts are detached, which are difficult to recover and the bolts are difficult to install back to their original positions. Therefore, it brings a lot of trouble to people. Summary of the invention

[0003] Aiming at the deficiencies in the prior art, the present invention provides a shockproof bolt and a manufacturing method thereof to solve the problems in the prior art.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A shockproof bolt comprises a screw rod and an expansion sleeve. The screw rod can be screwed together with the expansion sleeve. An extrusion block is provided at the front end of the screw rod. A ratchet is connected to the middle of the screw rod. A thread is provided at the rear of the screw rod. A slit is provided at the front end of the expansion sleeve. An extrusion rotation mechanism is provided on the expansion sleeve. The extrusion rotation mechanism is connected to the screw rod.

[0006] Preferably, the extrusion rotation mechanism includes a pressing block, a vertical groove is opened on the expansion sleeve, the pressing block is inserted in the vertical groove, the lower end of the pressing block is an arc structure, the arc structure is gear-connected with the outer side of the gear, and a tooth groove is provided on the inner side of the gear, and the tooth groove can be gear-connected with the ratchet.

[0007] Preferably, gear teeth are protruding from the arc-shaped structure.

[0008] Preferably, the gear is connected to an inner ring of a bearing, and an outer ring of the bearing is connected to an expansion sleeve.

[0009] Preferably, the pressing block is rotatably connected to the expansion sleeve, and a spring is provided between the pressing block and the expansion sleeve.

[0010] Preferably, the extrusion block is a conical extrusion block.

[0011] Preferably, the rear end of the screw rod may be connected to a nut, and the nut is fixed on the expansion sleeve.

[0012] A method for manufacturing a shockproof bolt comprises the following steps:

[0013] Step 1: After the flat steel coil is heated, two rollers extrude the flat steel coil, and a roller is provided with a roller cutter, which cuts the flat steel coil to form slits and vertical grooves during extrusion;

[0014] Step 2: Weld the inner ring of the bearing to the side of the gear;

[0015] Step 3: Weld the outer ring of the bearing to the flat steel coil;

[0016] Step 4: Weld the rotating shaft in the vertical groove, install the spring on the rotating shaft, and insert the pressing block into the rotating shaft so that the arc structure is gear-engaged with the gear;

[0017] Step 5: Roll the flat steel coil into a cylindrical shape and weld its ends to form an expansion sleeve, and then weld the nut to the rear end of the expansion sleeve;

[0018] Step 6: Cut the front end of the screw into a cone to form an extrusion block, and install the pawl on the screw;

[0019] Step 7: Insert the screw into the expansion sleeve and connect the nut to the screw.

[0020] The advantages of the present invention are:

[0021] When an earthquake occurs, the wall shakes and presses the pressing block, causing it to undergo a retraction-extension process. During the retraction of the pressing block, the screw can be driven to rotate, causing the extrusion block at the front end of the screw to further open the expansion sleeve. The expansion sleeve exerts an extrusion force on the wall to prevent the expansion sleeve from loosening. The greater the intensity of the earthquake, the greater the extrusion force exerted by the expansion sleeve on the wall. The design of the present invention is reasonable, meets market demand, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the expansion sleeve structure of the present invention;

[0025] Figure 3 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 3 As shown, an anti-vibration bolt comprises a screw rod 2 and an expansion sleeve 1, wherein the screw rod 2 can be screwed with the expansion sleeve 1, an extrusion block 8 is provided at the front end of the screw rod 2, a ratchet 6 is connected to the middle of the screw rod 2, a thread is provided at the rear of the screw rod 2, a slit 5 is provided at the front end of the expansion sleeve 1, an extrusion rotating mechanism is provided on the expansion sleeve 1, the extrusion rotating mechanism is connected to the screw rod 2, the extrusion rotating mechanism comprises a pressing block 4, a vertical groove is provided on the expansion sleeve 1, the pressing block 4 is inserted in the vertical groove, and the pressing block 4 is provided below The end is an arc-shaped structure, which is gear-engaged with the outer side of the gear 7. A tooth groove is provided on the inner side of the gear 7, and the tooth groove can be gear-engaged with the ratchet 6. The arc-shaped structure is convexly provided with gear teeth. The gear 7 is connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the expansion sleeve 1. The pressing block 4 is rotatably connected to the expansion sleeve 1. A spring is provided between the pressing block 4 and the expansion sleeve 1. The extrusion block 8 is a conical extrusion block 8. The rear end of the screw 2 can be connected to the nut 3, and the nut 3 is fixed on the expansion sleeve 1.

[0028] When in use, insert the screw rod 2 into the expansion sleeve 1 and connect it with the nut 3, rotate the screw rod 2 to make the extrusion block 8 move inward and extrude the expansion sleeve 1, during this process, the pawl 6 is inserted into the tooth groove, the pawl 6 can prevent the screw rod 2 from rotating in the opposite direction, thereby preventing the screw rod 2 from loosening, during an earthquake, if the bolt is loose and the bolt shakes as a whole, the wall can produce an extrusion force on the pressing block 4 and make the pressing block 4 move into the expansion sleeve 1, at this time, the pressing block 4 drives the gear 7 to rotate, and the gear 7 drives the screw rod 2 to rotate under the action of the pawl 6, the extrusion block 8 at the front end of the screw rod 2 moves into the expansion sleeve 1, extruding the expansion sleeve 1, causing the expansion sleeve 1 to further expand, thereby preventing the bolt from loosening.

[0029] A method for manufacturing a shockproof bolt comprises the following steps:

[0030] Step 1: After the flat steel coil is heated, two rollers extrude the flat steel coil, and a roller is provided with a roller cutter, which cuts the flat steel coil to form a slit 5 and a vertical groove during extrusion;

[0031] Step 2: Weld the inner ring of the bearing to the side of the gear 7;

[0032] Step 3: Weld the outer ring of the bearing to the flat steel coil;

[0033] Step 4: Weld the rotating shaft in the vertical groove, install the spring on the rotating shaft, and insert the pressing block 4 into the rotating shaft so that the arc structure is gear-engaged with the gear 7;

[0034] Step 5: Roll the flat steel coil into a cylindrical shape and weld its ends to form an expansion sleeve 1, and then weld the nut 3 to the rear end of the expansion sleeve 1;

[0035] Step 6: Cut the front end of the screw 2 into a cone to form an extrusion block 8, and install the pawl 6 on the screw 2;

[0036] Step 7: Insert the screw rod 2 into the expansion sleeve 1 and connect the nut 3 to the screw rod 2.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A shockproof bolt, characterized in that: The invention comprises a screw rod (2) and an expansion sleeve (1), wherein the screw rod (2) can be screwed to the expansion sleeve (1), an extrusion block (8) is provided at the front end of the screw rod (2), a ratchet (6) is connected to the middle of the screw rod (2), a thread is provided at the rear of the screw rod (2), a slit (5) is provided at the front end of the expansion sleeve (1), and an extrusion rotation mechanism is provided on the expansion sleeve (1), and the extrusion rotation mechanism is connected to the screw rod (2); The extrusion rotation mechanism comprises a pressing block (4), the expansion sleeve (1) is provided with a vertical groove, the pressing block (4) is inserted into the vertical groove, the lower end of the pressing block (4) is an arc-shaped structure, the arc-shaped structure is gear-engaged with the outer side of the gear (7), the inner side of the gear (7) is provided with a tooth groove, and the tooth groove can be gear-engaged with the ratchet (6); The arc-shaped structure is convexly provided with gear teeth; The gear (7) is connected to the inner ring of the bearing, and the outer ring of the bearing is connected to the expansion sleeve (1); The pressing block (4) is rotatably connected to the expansion sleeve (1), and a spring is provided between the pressing block (4) and the expansion sleeve (1); The extrusion block (8) is a conical extrusion block (8); The rear end of the screw rod (2) can be connected to a nut (3), the nut (3) is fixed on the expansion sleeve (1), and the nut (3) is welded to the rear end of the expansion sleeve (1); When in use, the screw rod (2) is inserted into the expansion sleeve (1) and connected to the nut (3). The screw rod (2) is rotated to move the extrusion block (8) inwardly and extrudes the expansion sleeve (1). During this process, the pawl (6) is inserted into the tooth groove. The pawl (6) prevents the screw rod (2) from rotating in the opposite direction, thereby preventing the screw rod (2) from loosening. During an earthquake, if the bolt is loose and the bolt as a whole shakes, the wall generates an extrusion force on the pressing block (4) and causes the pressing block (4) to move into the expansion sleeve (1). At this time, the pressing block (4) drives the gear (7) to rotate. The gear (7) drives the screw rod (2) to rotate under the action of the pawl (6). The extrusion block (8) at the front end of the screw rod (2) moves into the expansion sleeve (1), extruding the expansion sleeve (1) and causing the expansion sleeve (1) to further expand, thereby preventing the bolt from loosening.

2. A method for manufacturing a shockproof bolt, applicable to the shockproof bolt according to claim 1, characterized in that: The steps include: Step 1: After the flat steel coil is heated, two rollers extrude the flat steel coil, and a roller cutter is provided on the rollers. During extrusion, the roller cutter cuts the flat steel coil to form a slit (5) and a vertical groove; Step 2: Weld the inner ring of the bearing to the side of the gear (7); Step 3: Weld the outer ring of the bearing to the flat steel coil; Step 4: Weld the rotating shaft in the vertical groove, install the spring on the rotating shaft, and insert the pressing block (4) into the rotating shaft so that the arc structure is gear-engaged with the gear (7); Step 5: Roll the flat steel coil into a cylindrical shape and weld its ends to form an expansion sleeve (1), and then weld the nut (3) to the rear end of the expansion sleeve (1); Step 6: Cut the front end of the screw rod (2) into a conical shape to form an extrusion block (8), and install the pawl (6) on the screw rod (2); Step 7: Insert the screw rod (2) into the expansion sleeve (1) and connect the nut (3) to the screw rod (2).

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