Combined bolt fastener with shock-absorbing and damping function

Abstract

The present invention discloses a combined bolt fastener with shock-absorbing and damping functions, belonging to the field of fasteners. The combined bolt fastener with shock-absorbing and damping functions of the present invention comprises a fastening bolt, a fastening nut, an intermediate sleeve, a shock-absorbing sleeve, a pressure spring, a first bowl-shaped spring and a second bowl-shaped spring. By arranging the first bowl-shaped spring, the pressure spring, the shock-absorbing sleeve, the intermediate sleeve and the second bowl-shaped spring on the fastening bolt, the shock-absorbing sleeve and the pressure spring are used to realize radial vibration buffering of the bolt, and the bowl-shaped spring is used to realize axial vibration buffering of the bolt, so that the bolt fastener has a good shock-absorbing and damping effect; and the bowl-shaped spring can stably apply a reverse locking force to the fastening nut, so that the bolt fastener is not easy to loosen; in addition, the shock-absorbing sleeve is arranged on the inner side of the intermediate sleeve, and the two ends are closed by the bowl-shaped spring, so that the shock-absorbing sleeve is not easily corroded by the external environment and aged and failed, thereby improving the service life of the bolt fastener.

Description

Technical Field

[0001] The invention relates to a fastener, and more particularly to a combined bolt fastener with shock absorbing and damping functions. Background Art

[0002] Bolt fasteners are a kind of widely used mechanical parts, which mainly play the role of fastening connections. Various bolt fasteners can be seen on various machinery, vehicles, ships, railways, bridges, buildings, tools, instruments and chemical equipment.

[0003] Existing bolt fasteners fasten two or more parts together into a whole. In places with vibration, such as machine tools, vehicles, ships and railways, bolt fasteners will transmit vibrations between parts. Existing anti-loosening bolts can achieve a firm connection between parts, but for some parts that are sensitive to vibration, such as electrical components, existing rigidly connected bolt fasteners will completely transmit vibrations to vibration-sensitive parts. Long-term vibration will not only easily lead to loose connections, but also the vibration cannot be buffered, which can easily cause these parts to be damaged or have their service life reduced due to vibration.

[0004] At present, there are also bolt fasteners with shock-absorbing function. These fasteners usually set a rubber shock-absorbing sleeve between the bolt and the connected parts, and use the shock-absorbing sleeve to achieve radial and axial vibration buffering between the connected parts. However, although the shock-absorbing sleeve design can play a certain shock-absorbing role, its axial buffering amplitude is small, which can easily lead to bolt loosening; and the shock-absorbing sleeve is easily exposed to the external environment, which can easily lead to aging and loss of shock-absorbing function, and has a short service life.

[0005] Based on the above-mentioned problems existing in the existing bolt fasteners and the urgent demand of customers for shock-absorbing bolt fasteners, it is necessary to design a new type of combined bolt fastener. Summary of the invention

[0006] 1. Technical problem to be solved by the invention

[0007] The purpose of the present invention is to overcome the shortcomings of existing bolt fasteners such as poor shock absorption effect, easy loosening and short service life, and to provide a combined bolt fastener with shock absorption and damping function. The technical scheme of the present invention is adopted, by arranging a first bowl-shaped spring, a pressure spring, a shock-absorbing sleeve, an intermediate sleeve and a second bowl-shaped spring on the fastening bolt, utilizing the shock-absorbing sleeve and the pressure spring to realize radial vibration buffering of the bolt, and utilizing the bowl-shaped spring to realize axial vibration buffering of the bolt, so that the bolt fastener has a good shock absorption and damping effect; and the bowl-shaped spring can stably apply a reverse locking force to the fastening nut, so that the bolt fastener is not easy to loosen; in addition, the shock-absorbing sleeve is arranged on the inner side of the intermediate sleeve, and the two ends are closed by the bowl-shaped spring, so that the shock-absorbing sleeve is not easily corroded by the external environment and aged and failed, thereby improving the service life of the bolt fastener.

[0008] 2. Technical solution

[0009] In order to achieve the above object, the technical solution provided by the present invention is:

[0010] The invention discloses a combined bolt fastener with a shock-absorbing and damping function, comprising a fastening bolt, a fastening nut, an intermediate sleeve, a shock-absorbing sleeve, a pressure spring, a first bowl-shaped spring and a second bowl-shaped spring. The fastening bolt comprises a screw rod and a locking cap head at one end of the screw rod. The first bowl-shaped spring, the pressure spring, the shock-absorbing sleeve, the intermediate sleeve and the second bowl-shaped spring are sequentially sleeved on the screw rod. One end of the pressure spring abuts against the inner side of the first bowl-shaped spring, and the other end abuts against one end of the shock-absorbing sleeve. The other end of the shock-absorbing sleeve is axially The intermediate sleeve is limited in the middle of the screw, and has a sleeve and an end panel at one end of the sleeve. The sleeve is sleeved on the outside of the shock-absorbing sleeve, and the bowls of the first bowl-shaped spring and the second bowl-shaped spring are facing inward. The end panel of the intermediate sleeve abuts against the first bowl-shaped spring or the second bowl-shaped spring on the corresponding side when locked, and forms a locking space for locking the connected part between the second bowl-shaped spring or the first bowl-shaped spring on the other side. The fastening nut is screwed on the end of the screw and applies a locking force to the second bowl-shaped spring.

[0011] Furthermore, a through hole is provided in the center of the screw, a flower groove is provided at the end of the screw that cooperates with the fastening nut, a pull rod bolt is passed through the through hole, one end of the pull rod bolt is provided with an expansion cap head that cooperates with the end of the screw, and the other end is passed through the locking cap head and is provided with a tightening nut.

[0012] Furthermore, a clamping groove is provided in the middle of the screw rod, and a limiting clamping spring for axially limiting the shock-absorbing sleeve is provided in the clamping groove.

[0013] Furthermore, the shock-absorbing sleeve is a rubber sleeve.

[0014] 3. Beneficial effects

[0015] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0016] (1) A combined bolt fastener with a shock-absorbing and damping effect of the present invention comprises a fastening bolt, a fastening nut, an intermediate sleeve, a shock-absorbing sleeve, a pressure spring, a first bowl-shaped spring and a second bowl-shaped spring. By arranging the first bowl-shaped spring, the pressure spring, the shock-absorbing sleeve, the intermediate sleeve and the second bowl-shaped spring on the fastening bolt, the shock-absorbing sleeve and the pressure spring are used to realize radial vibration buffering of the bolt, and the bowl-shaped spring is used to realize axial vibration buffering of the bolt, so that the bolt fastener has a good shock-absorbing and damping effect; and the bowl-shaped spring can stably apply a reverse locking force to the fastening nut, so that the bolt fastener is not easy to loosen; in addition, the shock-absorbing sleeve is arranged on the inner side of the intermediate sleeve, and both ends are closed by the bowl-shaped spring, so that the shock-absorbing sleeve is not easily corroded by the external environment and aged and failed, thereby improving the service life of the bolt fastener;

[0017] (2) The combined bolt fastener with shock-absorbing and damping function of the present invention utilizes a pressure spring to press against a shock-absorbing sleeve. First, the pressure spring can keep the axial position of the shock-absorbing sleeve stable, so that the shock-absorbing sleeve is not easy to produce axial movement; second, after the bolt fastener is locked, the pressure spring can apply axial pressure to the shock-absorbing sleeve, so that the shock-absorbing sleeve has a tendency to expand radially, so that its radial bearing capacity is stronger; third, when the bolt fastener vibrates radially, the shock-absorbing sleeve deforms radially, forcing the shock-absorbing sleeve material to deform toward one side of the pressure spring. At this time, the pressure spring can compress and store energy, and play a shock-absorbing and damping role together with the shock-absorbing sleeve, consume vibration energy, and make the bolt fastener have better anti-seismic performance;

[0018] (3) A combined bolt fastener with a shock-absorbing and damping function of the present invention has a through hole at the center of the screw rod, a flower-shaped notch at the end of the screw rod that matches the fastening nut, a tie rod bolt passing through the through hole, an expansion cap head that matches the end of the screw rod at one end of the tie rod bolt, and a tightening nut passing through the locking cap head at the other end. The tie rod bolt can be used to expand the end of the screw rod to lock the fastening nut, thereby further preventing the bolt fastener from loosening;

[0019] (4) The combined bolt fastener with shock-absorbing and damping function of the present invention has a slot in the middle of the screw rod, and a limit spring for axially limiting the shock-absorbing sleeve is provided in the slot. The limit spring is used to limit the shock-absorbing sleeve, which has a simple structure and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view of a combined bolt fastener with a shock-absorbing and damping function according to the present invention;

[0021] Figure 2It is a schematic diagram of the combined state of a combined bolt fastener with a shock absorbing and damping function of the present invention;

[0022] Figure 3 It is a cross-sectional view of a combined state of a combined bolt fastener with a shock absorbing and damping function of the present invention;

[0023] Figure 4 The present invention is a schematic diagram of a combined bolt fastener with a shock-absorbing and damping function in use.

[0024] Explanation of the symbols in the schematic diagram:

[0025] 1. Fastening bolt; 1-1. Screw rod; 1-1a. Slot; 1-2. Locking cap head; 1-3. Through hole; 1-4. Flower-shaped notch; 2. Fastening nut; 3. Intermediate sleeve; 3-1. Casing; 3-2. End panel; 4. Shock-absorbing sleeve; 5. Pressure spring; 6. First bowl-shaped spring; 7. Second bowl-shaped spring; 8. Pull rod bolt; 8-1. Expansion cap head; 9. Tension nut; 10. Limiting retaining spring; 11. First connected part; 12. Second connected part. DETAILED DESCRIPTION

[0026] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0027] [Example]

[0028] Combination Figures 1 to 3 As shown, a combined bolt fastener with shock-absorbing and damping function of the present embodiment comprises a fastening bolt 1, a fastening nut 2, an intermediate sleeve 3, a shock-absorbing sleeve 4, a pressure spring 5, a first bowl-shaped spring 6 and a second bowl-shaped spring 7. The fastening bolt 1 comprises a screw rod 1-1 and a locking cap head 1-2 located at one end of the screw rod 1-1. The locking cap head 1-2 preferably adopts an external hexagonal cap head. The screw rod 1-1 is provided with an external thread. The first bowl-shaped spring 6, the pressure spring 5, the shock-absorbing sleeve 4, the intermediate sleeve 3 and the second bowl-shaped spring 7 are sequentially sleeved on the screw rod 1-1. The outer side of the first bowl-shaped spring 6 abuts against the locking cap head 1-2. One end of the pressure spring 5 abuts against the inner side of the first bowl-shaped spring 6, and the other end abuts against the damping sleeve 4. One end of the shock-absorbing sleeve 4 is abutted, and the other end of the shock-absorbing sleeve 4 is axially limited in the middle of the screw 1-1. The middle sleeve 3 has a sleeve 3-1 and an end panel 3-2 located at one end of the sleeve 3-1. The sleeve 3-1 and the end panel 3-2 are integrally formed. The sleeve 3-1 is sleeved on the outside of the shock-absorbing sleeve 4. The bowls of the first bowl-shaped spring 6 and the second bowl-shaped spring 7 are facing inward. The end panel 3-2 of the middle sleeve 3 abuts against the first bowl-shaped spring 6 or the second bowl-shaped spring 7 on the corresponding side when locked, and forms a locking space for locking the connected parts between the second bowl-shaped spring 7 or the first bowl-shaped spring 6 on the other side. The fastening nut 2 is screwed on the end of the screw 1-1 and applies a locking force to the second bowl-shaped spring 7. Figure 2 and Figure 3 As shown, the end panel 3-2 of the intermediate sleeve 3 is located on one side of the first bowl-shaped spring 6, the bowl end of the first bowl-shaped spring 6 is abutted against the end panel 3-2, and a locking space for accommodating the connected part is formed between the end panel 3-2 and the second bowl-shaped spring 7. In this way, when in use, only the fastening nut 2 and the second bowl-shaped spring 7 need to be removed, and there is no need to remove the intermediate sleeve 3. The assembly of the fastening bolt 1 and the intermediate sleeve 3 is inserted into the mounting hole of the connected part, and then the second bowl-shaped spring 7 is installed and locked with the fastening nut 2. During the tightening process of the fastening nut 2, the fastening nut 2 presses the second bowl-shaped spring 7 inwardly, and the locking cap head 1-2 presses the intermediate sleeve 3 inwardly through the first bowl-shaped spring 6, thereby fixing the connected part between the second bowl-shaped spring 7 and the end panel 3-2. The first bowl-shaped spring 6 and the second bowl-shaped spring 7 are deformed to generate axial pressure. When axial vibration occurs, the first bowl-shaped spring 6 and the second bowl-shaped spring 7 can buffer the axial vibration and maintain the reverse locking force on the fastening nut 2 to prevent the fastening nut 2 from loosening; when radial vibration occurs, the radial vibration is transmitted to the shock-absorbing sleeve 4 through the intermediate sleeve 3 to achieve radial vibration buffering of the bolt. The above-mentioned combined bolt fastener is adopted, so that the bolt fastener has a good shock-absorbing and damping effect; and the bowl-shaped spring can stably apply the reverse locking force to the fastening nut, so that the bolt fastener is not easy to loosen; in addition, the shock-absorbing sleeve 4 is arranged on the inner side of the intermediate sleeve 3, and the two ends are closed by the bowl-shaped spring, so that the shock-absorbing sleeve 4 is not easily corroded by the external environment and aged and failed, thereby improving the service life of the bolt fastener. In the above-mentioned combined bolt fastener, the pressure spring 5 can play the following roles: first, the pressure spring 5 can keep the axial position of the shock-absorbing sleeve 4 stable, so that the shock-absorbing sleeve 4 is not prone to axial movement; second, after the bolt fastener is tightened, the pressure spring 5 can apply axial pressure to the shock-absorbing sleeve 4, so that the shock-absorbing sleeve 4 has a tendency to expand radially, making its radial bearing capacity stronger; third, when the bolt fastener vibrates radially, the shock-absorbing sleeve 4 deforms radially, forcing the shock-absorbing sleeve material to deform toward the side of the pressure spring 5. At this time, the pressure spring 5 can compress and store energy, and jointly play a shock-absorbing and damping role with the shock-absorbing sleeve 4, consume vibration energy, and make the bolt fastener have better seismic performance.

[0029] catch Figures 1 to 3As shown, in order to further prevent the combined bolt fastener from loosening, in this embodiment, a through hole 1-3 is provided at the center of the screw rod 1-1, and a flower notch 1-4 is provided at the end of the screw rod 1-1 that matches the fastening nut 2. The flower notches 1-4 can be evenly provided with 4 to 6 lines along the generatrix direction of the screw rod 1-1. A pull rod bolt 8 is passed through the through hole 1-3, and one end of the pull rod bolt 8 is provided with an expansion cap head 8-1 that matches the end of the screw rod 1-1. The inner side of the expansion cap head 8-1 has a certain transition cone surface, and the other end is passed through by the locking cap head 1-2 and is provided with a tightening nut 9. After the above-mentioned fastening nut 2 is locked, the pull rod bolt 8 is pulled by screwing the tightening nut 9, and the flower end of the screw rod 1-1 is expanded and deformed outward by the expansion cap head 8-1, and the fastening nut 2 is locked, so as to further prevent the bolt fastener from loosening. In order to facilitate the assembly and production of the bolt fastener, a clamping groove 1-1a is provided in the middle of the screw rod 1-1. The clamping groove 1-1a is an annular groove structure. A limit spring 10 for axially limiting the shock-absorbing sleeve 4 is provided in the clamping groove 1-1a. The limit spring 10 is used to form a limit boss in the middle of the screw rod 1-1, thereby limiting one end of the shock-absorbing sleeve 4. The structure is simple and easy to assemble. The above-mentioned shock-absorbing sleeve 4 is preferably a rubber sleeve, which can consume vibration energy by utilizing the elastic deformation of the rubber sleeve. It can realize the conversion between radial force and axial force in cooperation with the pressure spring 5, and give full play to the shock-absorbing and buffering effect of the combined bolt fastener.

[0030] like Figure 4 As shown, a combined bolt fastener with a shock-absorbing and damping function in this embodiment, a fastening bolt 1, a first bowl-shaped spring 6, a pressure spring 5, a shock-absorbing sleeve 4 and an intermediate sleeve 3 are combined into an assembly assembly. When in use, firstly, holes are punched on the first connected member 11 and the second connected member 12, so that the inner diameters of the mounting holes on the first connected member 11 and the second connected member 12 are slightly larger than the outer diameter of the sleeve 3-1 of the intermediate sleeve 3, and the above-mentioned assembly assembly is inserted from one side of the mounting holes of the two connected members, so that the sleeve 3-1 of the intermediate sleeve 3 is located in the mounting holes of the connected members, and the end of the screw 1-1 of the fastening bolt 1 extends out from the other side of the mounting hole. , and then the second bowl-shaped spring 7 is sleeved on the end of the screw 1-1 and locked with the fastening nut 2; as the fastening nut 2 is screwed, the first bowl-shaped spring 6 and the second bowl-shaped spring 7 approach each other, clamping the first connected member 11 and the second connected member 12, and at the same time, the first bowl-shaped spring 6 and the second bowl-shaped spring 7 retain a certain deformation elastic force to buffer axial vibration; after the fastening nut 2 is locked, the pull rod bolt 8 is inserted from the end of the screw 1-1 and passes through the locking cap head 1-2 end, and then the tightening nut 9 is screwed on the passing end of the pull rod bolt 8, so that the flower end of the screw 1-1 expands and deforms outward, and the fastening nut 2 is further locked.

[0031] The present invention provides a combined bolt fastener with shock-absorbing and damping functions. A first bowl-shaped spring, a pressure spring, a shock-absorbing sleeve, an intermediate sleeve and a second bowl-shaped spring are arranged on the fastening bolt. The shock-absorbing sleeve and the pressure spring are used to achieve radial vibration buffering of the bolt, and the bowl-shaped spring is used to achieve axial vibration buffering of the bolt, so that the bolt fastener has good shock-absorbing and damping effects. Moreover, the bowl-shaped spring can stably apply a reverse locking force to the fastening nut, so that the bolt fastener is not easy to loosen. In addition, the shock-absorbing sleeve is arranged on the inner side of the intermediate sleeve, and both ends are closed by the bowl-shaped spring, so that the shock-absorbing sleeve is not easily corroded by the external environment and aged and failed, thereby improving the service life of the bolt fastener.

[0032] The present invention and its embodiments are described schematically above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and creatively designs a structure and an embodiment similar to the technical solution without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A combined bolt fastener with shock absorbing and damping function, Features: The invention comprises a fastening bolt (1), a fastening nut (2), an intermediate sleeve (3), a shock absorbing sleeve (4), a pressure spring (5), a first bowl-shaped spring (6) and a second bowl-shaped spring (7); the fastening bolt (1) comprises a screw rod (1-1) and a locking cap head (1-2) located at one end of the screw rod (1-1); the first bowl-shaped spring (6), the pressure spring (5), the shock absorbing sleeve (4), the intermediate sleeve (3) and the second bowl-shaped spring (7) are sequentially sleeved on the screw rod (1-1); one end of the pressure spring (5) abuts against the inner side of the first bowl-shaped spring (6), and the other end abuts against one end of the shock absorbing sleeve (4); the other end of the shock absorbing sleeve (4) is axially limited in the screw rod (1-1). The intermediate sleeve (3) comprises a sleeve (3-1) and an end panel (3-2) located at one end of the sleeve (3-1); the sleeve (3-1) is sleeved on the outer side of the shock-absorbing sleeve (4); the bowls of the first bowl-shaped spring (6) and the second bowl-shaped spring (7) are facing inward; the end panel (3-2) of the intermediate sleeve (3) abuts against the first bowl-shaped spring (6) or the second bowl-shaped spring (7) on the corresponding side when locked, and forms a locking space for locking the connected member between the second bowl-shaped spring (7) or the first bowl-shaped spring (6) on the other side; the fastening nut (2) is screwed on the end of the screw rod (1-1) and applies a locking force to the second bowl-shaped spring (7); The center of the screw rod (1-1) is provided with a through hole (1-3), the end of the screw rod (1-1) matching with the fastening nut (2) is provided with a flower notch (1-4), a pull rod bolt (8) is passed through the through hole (1-3), one end of the pull rod bolt (8) is provided with an expansion cap head (8-1) matching with the end of the screw rod (1-1), and the other end is passed through the locking cap head (1-2) and is provided with a tightening nut (9); A clamping groove (1-1a) is provided in the middle of the screw rod (1-1), and a limiting clamping spring (10) for axially limiting the shock-absorbing sleeve (4) is provided in the clamping groove (1-1a); The shock-absorbing sleeve (4) is a rubber sleeve.

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