Rotating shaft anti-loosening structure

Abstract

The utility model discloses a rotating shaft anti-loosening structure which comprises a support and a roller and further comprises a rotating shaft, the two sides of the roller are connected with connecting rods through wheel shafts, and the top ends of the connecting rods are connected with the support through the rotating shaft. The rotating shaft comprises a pressing rivet shaft, a gland and a plurality of connecting screws; one end of the pressing rivet shaft is fixedly connected with the connecting rod through a riveting technology, the riveted end of the pressing rivet shaft is of a non-circular structure, the other end of the pressing rivet shaft penetrates through the support, and the end, penetrating through the support, of the pressing rivet shaft is connected with the gland through the connecting screw. The rotating shaft is composed of the pressing rivet shaft, the gland and the connecting screws, one end of the pressing rivet shaft is fixedly connected with the connecting rod through the riveting technology to ensure that the pressing rivet shaft cannot rotate after being riveted, and the other end of the pressing rivet shaft penetrates through the shaft hole in the support to be connected with the gland through the connecting screws. Rotation torque borne by the gland cannot cause rotation and looseness of the screw.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating shafts, in particular to a rotating shaft anti-loosening structure. Background Art

[0002] In various mechanical devices and equipment, the rotating shaft is a common and key component, and its function is to realize the transmission and support of rotational motion. However, in practical applications, the loosening of the rotating shaft often has a serious impact on the normal operation of the equipment. Existing rotating shaft connection structures usually adopt simple threaded connection, key connection or interference fit and other methods; during long-term use, these connection methods are prone to loosening due to factors such as vibration, temperature change, and load change. For example, under the action of vibration, the friction between the threads of the threaded connection may gradually decrease, causing the threads to loosen; the key in the key connection may lose its effective fixation on the rotating shaft due to long-term impact and wear; the interference fit may reduce the interference amount due to material fatigue and thermal expansion and contraction, thereby causing the rotating shaft to loosen;

[0003] The common structure of connecting the roller and the bracket is that the roller is connected to the connecting rod through the wheel axle, and the connecting rod is connected to the bracket through the rotating shaft. The rotating shaft of the prior art is connected to the threaded hole on the connecting rod by a screw passing through the through hole of the bracket. In the existing connection method between the roller and the connecting rod, the screw is easy to rotate during the rotation of the connecting rod around the rotating shaft, which can easily cause the connection to loosen, resulting in a connection gap between the connecting rod and the bracket that is too large and cannot be used normally. Therefore, there is an urgent need for a rotating shaft anti-loosening structure that can prevent the bracket and the connecting rod from loosening. Utility Model Content

[0004] The utility model aims to provide a shaft anti-loosening structure, aiming to improve the problem that the screws are easy to rotate during the rotation of the existing connecting rod around the shaft, which can easily cause the connection to loosen, resulting in a connection gap between the connecting rod and the bracket being too large and unable to be used normally.

[0005] The utility model is achieved in this way:

[0006] A rotating shaft anti-loosening structure includes a bracket and a connecting rod, and also includes a rotating shaft, the top end of the connecting rod is connected to the bracket through the rotating shaft; the rotating shaft includes a riveted shaft, a pressure cover and multiple connecting screws; one end of the riveted shaft is fixedly connected to the connecting rod through a riveting process, the riveted end of the riveted shaft is a non-circular structure, the other end of the riveted shaft passes through the bracket, and the end of the riveted shaft that passes through the bracket is connected to the pressure cover through a connecting screw.

[0007] Furthermore, a cylindrical shaft head is provided at one end of the riveted shaft passing through the bracket, a shaft head end face is provided on the side of the cylindrical shaft head facing outward, a plurality of threaded holes are evenly arranged on the shaft head end face, and a positioning boss is provided in the middle of the shaft head end face.

[0008] Furthermore, a screw through hole is provided at the position of the pressure cover aligned with the threaded hole, and a positioning hole is provided in the middle of the pressure cover. The connecting screw passes through the screw through hole and is threadedly connected to the threaded hole. Thread glue is applied between the connecting screw and the threaded hole of the rivet shaft.

[0009] Furthermore, the distance between the center of each connecting screw and the center of the rotating shaft is the same, which is used to ensure that when the connecting rod rotates around the rotating shaft, the friction rotation torque generated by the pressure cover and the bracket will not be transmitted to the connecting screw.

[0010] Furthermore, a hexagonal structure is provided on the side of the riveting shaft, and the hexagonal structure is riveted in the connecting rod.

[0011] Furthermore, the other end of the connecting rod is rotatably connected to the roller via a wheel axle.

[0012] Furthermore, shaft holes are provided at positions aligned with the rotating shaft on both sides of the bracket, and one end of the shaft hole facing outward is a concave structure with a step.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The rotating shaft of the utility model is composed of a riveted shaft, a gland and connecting screws. One end of the riveted shaft is fixedly connected to the connecting rod through a riveting process to ensure that it will not rotate after riveting. The other end of the riveted shaft passes through the shaft hole on the bracket and is connected to the gland through multiple connecting screws. Since multiple screws are used for connection, the rotational torque applied to the gland will not cause the screws to rotate loose. It has the obvious advantages of simple structure, reliable connection, good anti-loosening effect and low cost.

[0015] 2. The utility model has thread glue applied between the connecting screw and the threaded hole of the riveting shaft, which can improve the anti-loosening effect in a vibration environment and further improve the connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model installed on the bracket and the connecting rod;

[0017] Figure 2 yes Figure 1 Schematic diagram of the structure in the main perspective;

[0018] Figure 3 yes Figure 2 Section view in AA plane;

[0019] Figure 4 yes Figure 1 Schematic diagram of the decomposition structure;

[0020] Figure 5 yes Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 6 This is a schematic diagram of the structure of the connecting rod and the rotating shaft in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the bracket in the utility model;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the pressure riveting shaft in the utility model;

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the pressure cover in the utility model.

[0025] In the figure: 1, bracket; 11, shaft hole; 2, roller; 3, connecting rod; 4, axle; 5, rotating shaft; 51, riveted shaft; 511, cylindrical shaft head; 512, hexagonal structure; 513, shaft head end face; 514, threaded hole; 515, positioning boss; 52, pressure cover; 521, screw through hole; 522, positioning hole; 53, connecting screw. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a rotating shaft anti-loosening structure includes a bracket 1 and a roller 2, and also includes a rotating shaft 5. The roller 2 is connected to a connecting rod 3 on both sides through a wheel axle 4, and the top of the connecting rod 3 is connected to the bracket 1 through the rotating shaft 5; this structure is convenient for the roller 2 to rotate and also convenient for fixing the wheel axle 4. The rotating shaft 5 includes a riveting shaft 51, a pressure cover 52 and a plurality of connecting screws 53; one end of the riveting shaft 51 is fixedly connected to the connecting rod 3 through a riveting process, and this structure can prevent the riveting shaft 51 and the connecting rod from loosening. The riveted end of the riveting shaft 51 is a non-circular structure, usually with a hexagonal cross-section, to ensure that the riveting shaft 51 will not rotate relative to the connecting rod 3 after riveting. The other end of the riveting shaft 51 passes through the bracket 1, and the end of the riveting shaft 51 passing through the bracket 1 is connected to the pressure cover 52 through a connecting screw 53; this structure is convenient for the rotating shaft 5 to be connected to the bracket 1 through the pressure cover 52.

[0029] like Figure 7 As shown, shaft holes 11 are provided on both sides of the bracket 1 in alignment with the rotating shaft 5, and an inner concave structure with a step is provided at the outer end of the shaft hole 11, and the diameter of the inner concave structure is larger than the diameter of the pressure cover; this structure facilitates the pressure cover 52 to be pressed into the shaft hole 11 to avoid the pressure cover bulging outward, and then the pressure cover 52 is stably connected to the riveting shaft 51 by bolts to ensure that the connecting rod 3 is stably connected to the bracket 1.

[0030] like Figure 6 and Figure 8 As shown, a hexagonal structure 512 is provided on the side of the riveting shaft 51, and the hexagonal structure 512 is riveted in the connecting rod 3; this structure facilitates the riveting shaft 51 to be stably connected to the top of the connecting rod 3. A cylindrical shaft head 511 is provided at one end of the riveting shaft 51 that passes through the bracket 1. The cylindrical shaft head 511 is convenient for passing through the bracket 1 and for connecting the pressure cover 52 to the bracket 1. A shaft head end face 513 is provided on the side of the cylindrical shaft head 511 facing outward. The shaft head end face 513 facilitates the matching of the pressure cover 52 to facilitate the connection of the pressure cover 52 to the riveting shaft 51. A plurality of threaded holes 514 are evenly arranged on the shaft head end face 513. The threaded holes 514 are convenient for matching the connecting screws 53, so as to facilitate the fixing of the pressure cover 52. A positioning boss 515 is provided in the middle of the shaft head end face 513. The positioning boss 515 facilitates the accurate installation of the pressure cover 52.

[0031] like Figure 8 As shown, the gland 52 is provided with a screw through hole 521 at the position aligned with the threaded hole 514, and the screw through hole 521 is convenient for the connection screw 53 to pass through the gland 52. A positioning hole 522 is provided in the middle of the gland 52, and the positioning hole 522 is convenient for the gland 52 to be stably sleeved on the positioning boss 515. The connection screw 53 passes through the screw through hole 521 and is threadedly connected to the threaded hole 514. Thread glue is applied between the connection screw 53 and the threaded hole 514 of the rivet shaft 51, which can improve the anti-loosening effect in a vibration environment and further improve the connection reliability.

[0032] like Figure 4 As shown, the distance between the center of each connecting screw 53 and the center of the rotating shaft 5 is the same, which is used to ensure that when the connecting rod 3 rotates around the rotating shaft 5, the friction rotation torque generated by the pressure cover 52 and the bracket 1 will not be transmitted to the connecting screw 53.

[0033] Working principle: The roller 2 is connected to the connecting rod 3 through the axle 4 according to the use requirements; then the top of the connecting rod 3 and the riveting shaft 51 are riveted together; then the cylindrical shaft head 511 is passed through the shaft hole 11, and the pressure cover 52 is fixed on the cylindrical shaft head 511 through the connecting screws 53. This structure can ensure that when the connecting rod 3 rotates around the rotating shaft 5, the friction rotation torque generated by the pressure cover 52 and the bracket 1 will not be transmitted to these connecting screws 53, so the rotation of the connecting rod 3 relative to the rotating shaft 5 will not cause the connecting screws 53 to loosen, ensuring that the connecting screws 53 can always tightly connect the pressure cover 52 and the riveting shaft 51 together, which has the obvious advantages of simple structure, reliable connection, good anti-loosening effect and low cost. Compared with the prior art, the rotating shaft 5 of the present application is composed of a riveted shaft 51, a pressure cover 52 and connecting screws 53. One end of the riveted shaft 51 is fixedly connected to the connecting rod 3 through a riveting process to ensure that it will not rotate after riveting. The other end of the riveted shaft 51 passes through the axial hole 11 on the bracket 1 and is connected to the pressure cover 52 through multiple connecting screws 53. Since multiple screws are used for connection, the rotational torque applied to the pressure cover 52 will not cause the screws to rotate loose.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotating shaft anti-loosening structure, comprising a bracket (1) and a connecting rod (3), characterized in that: It also includes a rotating shaft (5), and the top end of the connecting rod (3) is connected to the bracket (1) through the rotating shaft (5); the rotating shaft (5) includes a riveting shaft (51), a pressure cover (52) and a plurality of connecting screws (53); one end of the riveting shaft (51) is fixedly connected to the connecting rod (3) through a riveting process, and the riveted end of the riveting shaft (51) is a non-circular structure, and the other end of the riveting shaft (51) passes through the bracket (1); the end of the riveting shaft (51) passing through the bracket (1) is connected to the pressure cover (52) through a connecting screw (53).

2. A rotating shaft anti-loosening structure according to claim 1, characterized in that: One end of the riveting shaft (51) passing through the bracket (1) is provided with a cylindrical shaft head (511), and the side of the cylindrical shaft head (511) facing outward is provided with a shaft head end surface (513), a plurality of threaded holes (514) are evenly arranged on the shaft head end surface (513), and a positioning boss (515) is provided in the middle of the shaft head end surface (513).

3. A rotating shaft anti-loosening structure according to claim 2, characterized in that: The pressure cover (52) is provided with a screw through hole (521) at a position aligned with the threaded hole (514), and a positioning hole (522) is provided in the middle of the pressure cover (52). The connecting screw (53) passes through the screw through hole (521) and is threadedly connected to the threaded hole (514). Thread glue is applied between the connecting screw (53) and the threaded hole (514) of the rivet shaft (51).

4. A rotating shaft anti-loosening structure according to claim 3, characterized in that: The distance between the center of each connecting screw (53) and the center of the rotating shaft (5) is the same, which is used to ensure that when the connecting rod (3) rotates around the rotating shaft (5), the friction rotation torque generated by the pressure cover (52) and the bracket (1) will not be transmitted to the connecting screw (53).

5. The anti-loosening structure of a rotating shaft according to claim 1, characterized in that: A hexagonal structure (512) is provided on the side of the riveting shaft (51), and the hexagonal structure (512) is riveted in the connecting rod (3).

6. The anti-loosening structure of a rotating shaft according to claim 1, characterized in that: The other end of the connecting rod is rotationally connected to the roller (2) via a wheel axle (4).

7. The anti-loosening structure of a rotating shaft according to claim 1, characterized in that: Axial holes (11) are provided at positions aligned with the rotating shaft (5) on both sides of the bracket (1), and one end of the axial hole (11) facing outward is a concave structure with a step.

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