Anti-loose threaded fastening disc spring

Abstract

The utility model belongs to disc spring technical field especially is a kind of thread fastening disc spring of anti-loosening, including the disc spring main part by the stacking of multiple elastic units, further include: support disc;Mounting column, the mounting column is through the disc spring main part, the outer wall of the mounting column is fixed with multiple limit convex strip that distributes evenly along the circumference, the disc spring main part is in and is equipped with the first clamping groove compatible with the limit convex strip;Movable disc, the movable disc is located the top of the disc spring main part;Limit disc;And the locking bolt that is through the limit disc and is with the thread hole thread cooperation;In the utility model, by the cooperation of limit convex strip and clamping groove, the rotation of disc spring main part is limited, solves the loosening problem under high-frequency vibration, improves stability and buffering performance;Disc spring main part uses the cooperation of support disc, mounting column, movable disc, limit disc and locking bolt to realize installation, and installation is convenient, and stability is high.

Description

Technical Field

[0001] This utility model belongs to the field of disc spring technology, specifically relating to a threaded fastening disc spring that prevents loosening. Background Technology

[0002] Disc springs are a special type of spring that resembles a circular washer in shape. They can provide sufficient elastic extension by stacking a considerable number of disc springs. Due to their variable stiffness characteristics and compact installation, they are widely used in the machinery industry, petroleum industry, automotive industry, and aerospace industry.

[0003] Disc springs are typically installed by passing a pin through their central shaft hole, and then secured with screws.

[0004] For example, in the prior art, Chinese utility model patent with authorization announcement number CN222315760U discloses "a disc spring with overload protection function", which includes a mounting assembly and a disc spring. The mounting assembly includes a mounting column and a positioning base. The mounting column is fixedly installed on the top of the positioning base, and the disc spring is inserted into the outside of the mounting column. The mounting assembly also includes a force-bearing cover, which is inserted into the top of the mounting column.

[0005] While existing disc springs, including those mentioned above, can meet general usage requirements, the mounting post is directly inserted into the disc spring, and there is a lack of necessary limiting structure between the disc spring and the mounting post. This makes the disc spring prone to rotation or loosening during use, especially in high-frequency vibration operation scenarios. The disc spring generates high-frequency compression / reset, and the different washers of the disc spring can easily become misaligned and loose, affecting the cushioning performance of the disc spring.

[0006] To address the aforementioned problems, this application proposes a threaded fastening disc spring to prevent loosening. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a threaded fastening disc spring that prevents loosening, featuring ease of use and high stability.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a threaded fastening disc spring for preventing loosening, comprising a disc spring body composed of multiple stacked elastic units, and further comprising:

[0009] A support plate for supporting the disc spring body;

[0010] A mounting post fixed to the top surface of the support plate and having a threaded hole, the mounting post penetrating the disc spring body, a plurality of circumferentially evenly distributed limiting protrusions fixed on the outer wall of the mounting post, and a first slot adapted to the limiting protrusions being opened in the disc spring body;

[0011] A movable disc is fitted onto the mounting post, and the movable disc is located at the top of the disc spring body;

[0012] A limiting plate located at the top of the movable plate and connected to the mounting column; and

[0013] A locking bolt that passes through the limiting plate and engages with the threaded hole.

[0014] Preferably, the movable disc has a central hole through which the mounting post passes, and a second slot adapted to the limiting protrusion is provided in the central hole.

[0015] Preferably, the inner wall of the central hole abuts against the outer wall of the mounting post, and the inner wall of the second slot abuts against the outer wall of the limiting protrusion.

[0016] Preferably, at least three limiting protrusions are evenly distributed circumferentially, and the width of the first slot is equal to the width of the limiting protrusion, the length of the first slot is greater than the length of the limiting protrusion, and the diameter of the mounting post is smaller than the inner diameter of the disc spring body.

[0017] Preferably, the initial length of the disc spring body is equal to the length of the mounting post.

[0018] Preferably, the mounting column is detachably mounted to the top of the support plate using a fastener.

[0019] Preferably, the fastener includes:

[0020] Multiple countersunk screws are evenly distributed circumferentially. The support plate has a countersunk hole, and the bottom end of the mounting post has a threaded groove. The countersunk screws pass through the countersunk hole and are threaded into the threaded groove.

[0021] Preferably, the elastic unit consists of two symmetrically fitted elastic pads, and the top and bottom surfaces of the elastic pads are both planes.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] In this invention, the rotation of the disc spring body is restricted by the cooperation of the limiting protrusion and the slot, which solves the loosening problem under high frequency vibration and improves stability and buffering performance. The disc spring body is installed by the cooperation of the support plate, mounting column, movable plate, limiting plate and locking bolt, which is convenient to install and has high stability.

[0024] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0028] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the elastic unit in this utility model.

[0030] In the diagram: 1. Disc spring body; 11. Elastic unit; 111. First slot; 12. Elastic washer; 2. Support plate; 21. Countersunk hole; 3. Mounting post; 31. Threaded hole; 32. Limiting protrusion; 33. Threaded groove; 4. Movable plate; 41. Center hole; 42. Second slot; 5. Limiting plate; 6. Locking bolt; 7. Countersunk screw. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-4 The present invention provides the following technical solution: a threaded fastening disc spring for preventing loosening, comprising a disc spring body 1 composed of multiple elastic units 11 stacked together, and further comprising: a support plate 2 for supporting the disc spring body 1, a mounting post 3 fixed to the top surface of the support plate 2 and having a threaded hole 31, a movable plate 4 sleeved on the mounting post 3, a limiting plate 5 located on the top of the movable plate 4 and connected to the mounting post 3, and a locking bolt 6 passing through the limiting plate 5 and threadedly engaged with the threaded hole 31.

[0033] Furthermore, by Figure 1As shown in this embodiment, the mounting post 3 penetrates the disc spring body 1. Multiple circumferentially distributed limiting protrusions 32 are fixed on the outer wall of the mounting post 3. The disc spring body 1 has a first slot 111 that matches the limiting protrusions 32. The movable disk 4 is located at the top of the disc spring body 1. With the above scheme, in use, the disc spring body 1 is first fitted onto the mounting post 3 by engaging the limiting protrusions 32 on the outer wall of the mounting post 3 through the first slot 111 inside. Since the limiting protrusions 32 are evenly distributed circumferentially and match the first slot 111, the circumferential rotation of the disc spring body 1 relative to the mounting post 3 is restricted, so that it can only move along the axial direction of the mounting post 3. The support disk 2 provides a stable support base for the disc spring body 1, ensuring the installation reference of the entire structure.

[0034] Next, the movable disc 4 is fitted onto the mounting post 3, so that it is located at the top of the disc spring body 1. The limiting disc 5 is connected to the top of the mounting post 3. The locking bolt 6 passes through the limiting disc 5 and is threaded into the threaded hole 31 of the mounting post 3. When tightening is required, the locking bolt 6 is turned clockwise. Since the locking bolt 6 is threaded into the threaded hole 31, as the locking bolt 6 is screwed in, the limiting disc 5 will apply downward pressure to the movable disc 4.

[0035] When the movable disc 4 is subjected to pressure, it will transmit the force to the disc spring body 1, causing the disc spring body 1 to be compressed. The elastic force generated by the stacking of multiple elastic units 11 will react upward on the movable disc 4 and the limiting disc 5, forming a preload force to ensure the stability of the disc spring body 1.

[0036] After tightening, the continuous elastic force generated by the disc spring body 1 can effectively offset the influence of external vibration, impact and other factors on the locking bolt 6, and prevent the locking bolt 6 from loosening due to vibration.

[0037] Meanwhile, because the disc spring body 1 is restricted from circumferential rotation by the limiting protrusion 32 and the first slot 111, the movable disc 4 can only move axially on the mounting post 3 and cannot rotate circumferentially. The threaded engagement between the locking bolt 6 and the threaded hole 31, as well as the limiting effect of the limiting disc 5, make the entire structure effectively constrained in both the circumferential and axial directions. When the locking bolt 6 is subjected to a torque that attempts to loosen, the elastic force of the disc spring body 1 will always maintain pressure on the movable disc 4 and the limiting disc 5, thereby increasing the friction between the locking bolt 6 and the threaded hole 31 and preventing the rotation of the locking bolt 6, thus achieving the effect of preventing loosening. This structural design, through the dual action of mechanical limiting and elastic preload, ensures the stability and reliability of the threaded connection under complex working conditions, thereby ensuring the stability of the disc spring body 1 during installation and the reliability of its operation.

[0038] Preferably, by Figure 1As shown in this embodiment, the movable disk 4 is provided with a central hole 41 through which the mounting post 3 passes, and a second slot 42 adapted to the limiting protrusion 32 is provided in the central hole 41. With the above solution, when in use, the limiting protrusion 32 cooperates with the disc spring body 1 through the first slot 111, and at the same time forms an axial sliding and circumferential fixed constraint relationship with the movable disk 4 through the second slot 42, so that the movable disk 4 and the disc spring body 1 are rigidly limited in the circumferential direction.

[0039] This dual-limit design eliminates the rotational freedom of both relative to the mounting post 3, avoiding the problem of uneven preload caused by circumferential movement of components in traditional spring structures. When the locking bolt 6 is subjected to external vibration excitation, the movable disc 4 and the disc spring body 1 cannot generate relative torsion, effectively preventing the loosening tendency caused by the accumulation of circumferential displacement of the threaded pair, and further improving stability.

[0040] Preferably, by Figure 1 As shown, in this embodiment, the inner wall of the central hole 41 abuts against the outer wall of the mounting post 3, and the inner wall of the second slot 42 abuts against the outer wall of the limiting protrusion 32. With the above solution, during use, the tight abutment between the inner wall of the central hole 41 and the outer wall of the mounting post 3, combined with the fitting constraint of the inner wall of the second slot 42 on the outer wall of the limiting protrusion 32, eliminates the radial gap between the movable disc 4 and the mounting post 3. This gapless fit enables the movable disc 4 to obtain high-precision guidance when moving axially, significantly improving the coaxiality of the disc spring body 1 during the extension and retraction process.

[0041] Preferably, by Figure 1 As shown in this embodiment, there are at least three limiting protrusions 32 evenly distributed along the circumference, and the width of the first slot 111 is equal to the width of the limiting protrusion 32, the length of the first slot 111 is greater than the length of the limiting protrusion 32, and the diameter of the mounting post 3 is smaller than the inner diameter of the disc spring body 1. By adopting the above scheme, the off-center load problem that may be caused by single-point or double-point limiting is avoided during use.

[0042] The design of the first slot 111 having a length greater than the length of the limiting protrusion 32 provides a guide space for the axial movement of the disc spring body 1, while limiting its circumferential rotation range. When the disc spring body 1 is compressed, the axial deformation of the elastic unit 11 is quantitatively controlled by the length difference between the first slot 111 and the limiting protrusion 32.

[0043] The design of mounting post 3 having a diameter smaller than the inner diameter of disc spring body 1 provides free space for radial expansion of disc spring body 1 during compression, avoiding edge stress concentration caused by radial expansion of its conical surface when disc spring body 1 is compressed.

[0044] Preferably, by Figure 1As shown in this embodiment, the initial length of the disc spring body 1 is equal to the length of the mounting post 3. After adopting the above scheme, when in use, after assembly, due to the presence of the movable plate 4, the movable plate 4 has a thickness, which enables the disc spring body 1 to generate a preload force on the movable plate 4.

[0045] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the mounting column 3 is detachably mounted on the top of the support plate 2 using a fastener. With the above solution, it is convenient to replace the damaged support plate 2 or mounting column 3 during use, and it is also easy to assemble the entire structure.

[0046] Optionally, by Figures 1-3 As shown in this embodiment, the fastener includes: a plurality of countersunk screws 7 evenly distributed along the circumference, a countersunk hole 21 on the support plate 2, and a threaded groove 33 at the bottom end of the mounting post 3. The countersunk screws 7 pass through the countersunk hole 21 and are threaded into the threaded groove 33. With the above solution, in use, the support plate 2 and the mounting post 3 are assembled by a plurality of countersunk screws 7 evenly distributed along the circumference. The assembly is convenient, the stability is high, and it is also easy to replace the damaged support plate 2 or mounting post 3.

[0047] Preferably, by Figure 1 , Figure 2 and Figure 4 As shown in this embodiment, the elastic unit 11 is composed of two symmetrically fitted elastic pads 12, and the top and bottom surfaces of the elastic pads 12 are both planes. With the above solution, when in use, the planar structure of the elastic pads 12 is completely orthogonal to the stacking direction of the disc spring body 1, forming a mirror-symmetrical force structure, so that the radial expansion force generated by each elastic unit 11 during compression cancels each other out, avoiding the lateral component force caused by the conical inclination of the traditional single elastic unit 11.

[0048] Components not described in detail in this article are existing technologies.

[0049] The working principle and usage process of this utility model: When using the disc spring body 1 of this utility model, the disc spring body 1 is first fitted onto the mounting post 3 by engaging the limiting protrusion 32 on the outer wall of the mounting post 3 through the first slot 111 inside it. Since the limiting protrusion 32 is evenly distributed along the circumference and is adapted to the first slot 111, the circumferential rotation of the disc spring body 1 relative to the mounting post 3 is restricted, so that it can only move along the axial direction of the mounting post 3. The support plate 2 provides a stable support base for the disc spring body 1, ensuring the installation reference of the entire structure.

[0050] Next, the movable disc 4 is fitted onto the mounting post 3, so that it is located at the top of the disc spring body 1. The limiting disc 5 is connected to the top of the mounting post 3. The locking bolt 6 passes through the limiting disc 5 and is threaded into the threaded hole 31 of the mounting post 3. When tightening is required, the locking bolt 6 is turned clockwise. Since the locking bolt 6 is threaded into the threaded hole 31, as the locking bolt 6 is screwed in, the limiting disc 5 will apply downward pressure to the movable disc 4.

[0051] When the movable plate 4 is subjected to pressure, it will transmit the force to the disc spring body 1, causing the disc spring body 1 to be compressed. The elastic force generated by the stacking of multiple elastic units 11 will react upward on the movable plate 4 and the limiting plate 5, forming a preload force to ensure the stability of the disc spring body 1.

[0052] After tightening, the continuous elastic force generated by the disc spring body 1 can effectively offset the influence of external vibration, impact and other factors on the locking bolt 6, and prevent the locking bolt 6 from loosening due to vibration.

[0053] Meanwhile, since the disc spring body 1 is restricted from circumferential rotation by the limiting protrusion 32 and the first slot 111, the movable disc 4 can only move axially on the mounting column 3 and cannot rotate circumferentially. The threaded engagement of the locking bolt 6 and the threaded hole 31, as well as the limiting effect of the limiting disc 5, make the whole structure effectively constrained in both the circumferential and axial directions.

[0054] When the locking bolt 6 is subjected to an attempt to loosen, the elastic force of the disc spring body 1 will always maintain pressure on the movable disc 4 and the limiting disc 5, thereby increasing the friction between the locking bolt 6 and the threaded hole 31, preventing the locking bolt 6 from rotating, thus achieving the effect of preventing loosening. This structural design, through the dual action of mechanical limiting and elastic preload, ensures the stability and reliability of the threaded connection under complex working conditions, thereby ensuring the stability of the disc spring body 1 during installation and the reliability of its operation.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A threaded fastening disc spring for preventing loosening, comprising a disc spring body (1) composed of multiple elastic units (11) stacked together, characterized in that, Also includes: Support plate (2) for supporting the disc spring body (1); A mounting post (3) is fixed to the top surface of the support plate (2) and has a threaded hole (31). The mounting post (3) passes through the disc spring body (1). Multiple limiting protrusions (32) are fixed on the outer wall of the mounting post (3) and are evenly distributed in the circumferential direction. A first slot (111) that matches the limiting protrusions (32) is opened in the disc spring body (1). A movable disc (4) is fitted onto the mounting post (3), and the movable disc (4) is located on top of the disc spring body (1); A limiting plate (5) located on top of the movable plate (4) and connected to the mounting column (3); and A locking bolt (6) passes through the limiting plate (5) and is threaded into the threaded hole (31).

2. A threaded fastener disc spring to prevent loosening according to claim 1, characterized in that: The movable plate (4) is provided with a central hole (41) through which the mounting post (3) passes, and a second slot (42) adapted to the limiting protrusion (32) is provided in the central hole (41).

3. A threaded fastener disc spring to prevent loosening according to claim 2, characterized in that: The inner wall of the central hole (41) abuts against the outer wall of the mounting post (3), and the inner wall of the second slot (42) abuts against the outer wall of the limiting protrusion (32).

4. A thread fastening disc spring according to claim 1, wherein: At least three limiting protrusions (32) are evenly distributed circumferentially, and the width of the first slot (111) is equal to the width of the limiting protrusions (32), the length of the first slot (111) is greater than the length of the limiting protrusions (32), and the diameter of the mounting post (3) is smaller than the inner diameter of the disc spring body (1).

5. A threaded fastener disc spring to prevent loosening according to claim 1, characterized in that: The initial length of the disc spring body (1) is equal to the length of the mounting post (3).

6. A threaded fastener disc spring to prevent loosening according to claim 1, characterized in that: The mounting post (3) is detachably mounted on the top of the support plate (2) using fasteners.

7. A threaded fastener disc spring to prevent loosening according to claim 6, characterized in that: The fastener includes: Multiple countersunk screws (7) are evenly distributed along the circumference. The support plate (2) is provided with countersunk holes (21). The bottom end of the mounting post (3) is provided with a threaded groove (33). The countersunk screws (7) pass through the countersunk holes (21) and are threaded into the threaded groove (33).

8. A threaded fastener disc spring to prevent loosening according to claim 1, characterized in that: The elastic unit (11) is composed of two symmetrically fitted elastic pads (12), and the top and bottom surfaces of the elastic pads (12) are both planes.

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