A shafting connection structure capable of resisting transient impact

Abstract

The utility model discloses a kind of shafting connecting structures capable of resisting transient impact, including first rotating shaft and second rotating shaft, the radius of first rotating shaft and second rotating shaft is same, and the splicing of second rotating shaft coaxial line is in the one end of first rotating shaft;First rotating shaft and second rotating shaft are respectively provided with first splicing structure and second splicing structure on the end of mutual approach, when first rotating shaft and second rotating shaft coaxial line are spliced together, first splicing structure and second splicing structure are mutually matched and form several structure cavities, each structure cavity is placed with buffer structure, when relative rotation occurs between first rotating shaft and second rotating shaft, first splicing structure and second splicing structure can make each buffer structure simultaneously occur deformation;By shafting splicing connection, cooperate first splicing structure, second splicing structure and buffer structure on it, ensure the reliability of shafting rotation transmission, resist transient impact by buffer structure, inhibit radial bounce of shafting due to external impact.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission technology, and more specifically, it is a shaft connection structure that can resist transient impacts. Background Technology

[0002] In the field of mechanical transmission, shafts often lack structures to withstand external impacts, leading to radial runout and damage to transmission components. For example, in industrial motors, when a motor is overloaded, the shaft is prone to radial runout due to mechanical vibration, causing abnormal meshing clearance between the shaft and gears, exacerbating gear tooth wear, and even causing gear jamming, thus shortening the motor's lifespan. In wind power equipment, the wind turbine main shaft is easily vibrated by unstable airflows such as gusts and turbulence, resulting in radial runout, which reduces the transmission accuracy between the main shaft and the speed increaser, exacerbates bearing raceway wear, and increases maintenance costs. In the aerospace field, the flaps of fixed-wing aircraft are prone to high-intensity vibrations from takeoff and landing airflows. This vibration is transmitted to the output shaft of the reducer, easily causing radial runout, which leads to increased mechanical wear and shortens the lifespan of the reducer gear train. Currently, most shafts are integrally designed without a buffer structure, making them unable to absorb impact loads. Therefore, the shaft is highly susceptible to radial runout, leading to fatigue fracture and a series of safety accidents. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a shaft connection structure that can resist transient impacts. By splicing and connecting the shafts, and with the first splicing structure, second splicing structure and buffer structure thereon, the reliability of shaft rotation transmission is ensured. The buffer structure resists transient impacts and suppresses radial runout of the shafts due to external impacts.

[0004] Technical Solution: To achieve the above objective, this utility model provides a shaft connection structure capable of resisting transient impacts, comprising a first rotating shaft and a second rotating shaft. The first and second rotating shafts have the same radius, and the second rotating shaft is coaxially spliced ​​to one end of the first rotating shaft. A first splicing structure and a second splicing structure are respectively provided on the ends of the first and second rotating shafts that are close to each other. When the first and second rotating shafts are coaxially spliced ​​together, the first and second splicing structures cooperate with each other to form a plurality of structural cavities. Each of the structural cavities contains a buffer structure. When the first and second rotating shafts rotate relative to each other, the first and second splicing structures can cause each of the buffer structures to deform simultaneously.

[0005] Furthermore, the first splicing structure includes a plurality of first splicing blocks arranged in a circumferential array, each first splicing block having a fan-shaped radial cross-section, and each first splicing block being integrally connected to a first rotating shaft; the second splicing structure includes a plurality of second splicing blocks arranged in a circumferential array, each second splicing block having the same radial cross-section as the first splicing block, and each second splicing block being integrally connected to a second rotating shaft; the number of second splicing blocks is the same as the number of first splicing blocks, and the arc length distance between two adjacent second splicing blocks in the circumferential direction is equal to the arc length distance between two adjacent first splicing blocks in the circumferential direction.

[0006] Furthermore, after the first and second rotating shafts are spliced ​​together along the same axis, the first splicing block and the second splicing block cooperate with each other to form a plurality of structural cavities evenly distributed along the circumferential direction between the first splicing structure and the second splicing structure; each structural cavity is enclosed by the side face of the adjacent first and second splicing blocks that are close to each other and the end face of the first and second rotating shafts that are close to each other, and the shape of each structural cavity is adapted to the shape of the buffer structure, and each buffer structure is installed in the cavity after it is formed.

[0007] Furthermore, each of the buffer structures is a rubber block, and the shape of each buffer structure is a fan-shaped block with the same shape as the first splicing block and the second splicing block; when the buffer structure is installed into the structural cavity, the two sides of the buffer structure are respectively fixedly connected to the side surfaces of the adjacent first splicing block and the second splicing block that are close to each other.

[0008] Furthermore, after the first splicing block, the second splicing block, and the buffer structure are spliced ​​together, the radial cross-sectional outer contours of the three together form a complete and smooth circle; along the circumferential direction, starting from any one of the first splicing blocks, the first splicing block, the buffer structure, and the second splicing block are arranged in sequence; and in the spliced ​​state, the first splicing block, the second splicing block, and the end of each buffer structure near the axis together form a radial deformation reserved cavity located in the splicing center area; the radial deformation reserved cavity is cylindrical and is coaxial with the first and second rotating axes.

[0009] Furthermore, it also includes an axial reserved cavity. In the spliced ​​state, a gap is set between the end face of the first splicing block near the second rotating shaft and the end face of the second rotating shaft near the first rotating shaft, thereby forming a first axial gap; a gap is set between the end face of the second splicing block near the first rotating shaft and the end face of the first rotating shaft near the second rotating shaft, thereby forming a second axial gap; the first axial gap and the second axial gap have the same size, and the two together constitute the axial reserved cavity.

[0010] Beneficial Effects: Compared with existing technologies, the shaft connection structure of this utility model, capable of resisting transient impacts, utilizes a first and second rotating shaft that can be spliced ​​together, along with a first and second splicing structure. This not only ensures stable transmission of shaft rotation torque and reliable transmission, but also provides precise installation and deformation space for the buffer structure. The buffer structure can directly absorb the transient impact energy acting on the shaft, effectively suppressing radial runout caused by external impacts and preventing fatigue fracture due to continuous radial runout. It also reduces abnormal friction and wear between the shaft and surrounding transmission components, extending the service life of the shaft and related transmission components. Furthermore, the radial deformation pre-reserved cavity in the structure provides sufficient deformation accommodation space for the buffer structure under compression, preventing outward expansion of the buffer structure from interfering with transmission. The axial pre-reserved cavity can also cope with axial impacts that the shaft may experience, further enhancing overall impact resistance. It is widely adaptable to various shaft systems in the mechanical transmission field that are susceptible to external impacts, effectively solving the problems of existing integrated shaft systems being unable to absorb impacts and prone to failure due to radial runout. Attached Figure Description

[0011] Figure 1 This is an assembly diagram of a shaft connection structure that can resist transient impacts according to the present invention.

[0012] Figure 2 This is a structural diagram of the first and second rotating shafts in their spliced ​​state.

[0013] Figure 3 A schematic diagram of the structure of the first or second rotating shaft;

[0014] Figure 4 This is a schematic diagram of the buffer structure;

[0015] Figure 5 This is a cross-sectional view of the spliced ​​area along its length.

[0016] Figure 6 This is a cross-sectional view of the spliced ​​area along the axial direction. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-6As shown, a shaft connection structure capable of resisting transient impacts includes a first rotating shaft 1 and a second rotating shaft 2. The first rotating shaft 1 and the second rotating shaft 2 have the same radius, and the second rotating shaft 2 is coaxially spliced ​​to one end of the first rotating shaft 1. In the embodiment of this utility model, the first rotating shaft 1 and the second rotating shaft 2 are the output shafts in the planetary gear reducer structure of the flap system. That is, the output shaft in the planetary gear reducer structure is spliced ​​from the first rotating shaft 1 and the second rotating shaft 2. Since the flap system is a system structure of a fixed-wing aircraft, the arrangement of its components should meet the lightweight and high-strength requirements of the design requirements of fixed-wing aircraft. Therefore, the first rotating shaft 1 and the second rotating shaft 2 are both integrally cast from titanium alloy material (TC18). The end of the first rotating shaft 1 away from the second rotating shaft 2 is provided with a meshing connection structure for cooperating with other components in the planetary gear reducer structure, and the end of the second rotating shaft 2 away from the first rotating shaft 1 is provided with a meshing connection structure for cooperating with the driven component.

[0019] It should be emphasized that, although in the embodiments described in this utility model, the first rotating shaft 1 and the second rotating shaft 2 are formed by splitting the output shaft of the planetary gear reducer structure of the flap system into two parts, that is, the first rotating shaft 1 and the second rotating shaft 2 are different shaft segments of the same shaft; this does not mean that the first rotating shaft 1 and the second rotating shaft 2 can only be set in this way. In other embodiments not described, the first rotating shaft 1 and the second rotating shaft 2 can also be set as two different shafts.

[0020] The first rotating shaft 1 and the second rotating shaft 2 have the same structure, and a first splicing structure 3 and a second splicing structure 4 are respectively provided on the ends of the first rotating shaft 1 and the second rotating shaft 2 that are close to each other. When the first rotating shaft 1 and the second rotating shaft 2 are spliced ​​together on the same axis, the first splicing structure 3 and the second splicing structure 4 cooperate with each other to form a plurality of structural cavities 5. Each of the structural cavities 5 contains a buffer structure 6, and each buffer structure 6 is an elastic component such as a rubber block. The buffer structure 6 can connect the first splicing structure 3 and the second splicing structure 4 together, so that when any one of the first rotating shaft 1 and the second rotating shaft 2 rotates, the other shaft rotates simultaneously and synchronously. When relative rotation occurs between the first shaft 1 and the second shaft 2, that is, when the first shaft 1 or the second shaft 2 vibrates due to vibrations caused by other connected components or other external factors, the first shaft 1 or the second shaft 2 will bear the transient impact caused by these vibrations. Since the buffer structure 6 is an elastic component rather than a rigid component, it cannot completely prevent the first shaft 1 or the second shaft 2 from shaking. When the first shaft 1 or the second shaft 2 shakes, it will cause the positional relationship between the first splicing structure 3 and the second splicing structure 4 to change, thereby changing the size of each structural cavity 5 at the same time. That is, the first splicing structure 3 and the second splicing structure 4 can cause each of the buffer structures 6 to deform at the same time.

[0021] The first splicing structure 3 includes a plurality of first splicing blocks 7 arranged in a circumferential array. The radial cross-section of each first splicing block 7 is fan-shaped, and each first splicing block 7 is integrally connected to the first rotating shaft 1. The second splicing structure 4 includes a plurality of second splicing blocks 8 arranged in a circumferential array. The radial cross-section of each second splicing block 8 is the same as the radial cross-section of the first splicing block 7, and each second splicing block 8 is integrally connected to the second rotating shaft 2. The number of second splicing blocks 8 is the same as the number of first splicing blocks 7, and the arc length distance between two adjacent second splicing blocks 8 in the circumferential direction is equal to that between two adjacent second splicing blocks 7. The first splicing blocks 7 have equal arc length spacing in the circumferential direction; in the embodiment of the present invention, the first splicing structure 3 includes two first splicing blocks 7, and the second splicing structure 4 includes two second splicing blocks 8. After the first rotating shaft 1 and the second rotating shaft 2 are spliced, the first splicing blocks 7 and the second splicing blocks 8 are alternately distributed in the circumferential direction, and a structural cavity 5 is formed between adjacent first splicing blocks 7 and second splicing blocks 8; in the circumferential direction, starting from any one of the first splicing blocks 7, the structural cavities 5, the first splicing blocks 7 and the second splicing blocks 8 are arranged in the order of first splicing block 7, structural cavity 5 and second splicing block 8.

[0022] After the first rotating shaft 1 and the second rotating shaft 2 are spliced ​​together along the same axis, the first splicing block 7 and the second splicing block 8 cooperate with each other to form a plurality of structural cavities 5 evenly distributed along the circumferential direction between the first splicing structure 3 and the second splicing structure 4. Each structural cavity 5 is formed by the side of the adjacent first splicing block 7 and the adjacent end face of the first rotating shaft 1 and the adjacent end face of the second rotating shaft 2. The shape of each structural cavity 5 is adapted to the shape of the buffer structure 6. Each buffer structure 6 is installed in the structural cavity 5 after it is formed. After the buffer structure 6 is installed in the structural cavity 5, the two sides of the buffer structure 6 are fixedly connected to the adjacent side of the first splicing block 7 and the adjacent side face of the second splicing block 8, respectively, so as to ensure that there is no gap between the buffer structure 6 and each splicing block. This ensures that when either the first rotating shaft 1 or the second rotating shaft 2 rotates, the torque can be transmitted from the actively rotating shaft to the passively rotating shaft through the buffer structure 6.

[0023] More specifically, assuming the first rotating shaft 1 is the active rotating shaft, when the first rotating shaft 1 rotates, each of the first splicing blocks 7 rotates synchronously with the first rotating shaft 1, and the first splicing block 7 can transmit the torque generated when the first rotating shaft 1 rotates to the buffer structure 6. Since the buffer structure 6 is a solid rubber block, the buffer structure 6 can transmit the above torque to the second rotating shaft 2, so that the second rotating shaft 2 can rotate synchronously with the first rotating shaft 1; and when the first rotating shaft 1 or the second rotating shaft 2 shakes due to external impact, since the buffer structure 6 is an elastic component rather than a rigid component... Therefore, it cannot completely prevent the first rotating shaft 1 or the second rotating shaft 2 from shaking. As a result, the positional relationship between the first splicing structure 3 and the second splicing structure 4 will change due to shaking, thereby changing the size of each structural cavity 5. This causes the buffer structure 6 to deform. Although the buffer structure 6 cannot completely prevent the first rotating shaft 1 or the second rotating shaft 2 from shaking, it can buffer the floating of the shaking through its own deformation, preventing the shaking from being transmitted between the first rotating shaft 1 and the second rotating shaft 2, thereby preventing the first rotating shaft 1 and the second rotating shaft 2 from jumping due to shaking.

[0024] Each of the buffer structures 6 is a fan-shaped block with the same shape as the first splicing block 7 and the second splicing block 8. After the buffer structure 6 is installed in the structural cavity 5, the two sides of the buffer structure 6 are respectively fixedly connected to the adjacent first splicing block 7 and the adjacent second splicing block 8. The buffer structure 6 is fixedly bonded to the structural cavity 5 by a strong adhesive, that is, the two sides of the buffer structure 6 are fixedly bonded to the adjacent first splicing block 7 and the adjacent second splicing block 8 by a strong adhesive. This ensures that there is no relative sliding between the buffer structure 6 and the first splicing block 7 and the second splicing block 8. When the first rotating shaft 1 and the second rotating shaft 2 rotate relative to each other, the first splicing block 7 or the second splicing block 8 can directly drive the buffer structure 6 to deform.

[0025] After the first splicing block 7, the second splicing block 8, and the buffer structure 6 are spliced ​​together, the radial cross-sectional outer contours of the three together form a complete and smooth circle. The mating area of ​​the first splicing block 7, the second splicing block 8, and the buffer structure 6 is called the splicing area. In the spliced ​​state, the radial cross-section of the splicing area is the same as the radial cross-section of the shaft of the first rotating shaft 1 and the shaft of the second rotating shaft 2. That is, from the circumferential perspective, the splicing area coincides with the contours of the first rotating shaft 1 and the second rotating shaft 2. That is, the outer surfaces of the first splicing block 7, the second splicing block 8, and the splicing area are smooth circumferential surfaces of equal diameter. Although no other structures are set outside the splicing area in the embodiment of this utility model, in actual use, related components may be fitted on the first rotating shaft 1, the second rotating shaft 2, or the splicing area. Therefore, this setting can ensure that the side of the buffer structure 6 away from the axis after splicing will not protrude from the outer contours of the first rotating shaft 1 and the second rotating shaft 2, thereby avoiding interference between the buffer structure 6 and other components fitted on the first rotating shaft 1 or the second rotating shaft 2.

[0026] Furthermore, in the spliced ​​state, the buffer structures 6, the first splicing block 7, and the second splicing block 8 are alternately distributed along the circumferential direction. That is, starting from any one of the first splicing blocks 7 along the circumferential direction, the buffer structures 6, the first splicing blocks 7, and the second splicing blocks 8 are arranged in the order of first splicing block 7, buffer structure 6, and second splicing block 8. The first splicing block 7, the second splicing block 8, and the end of each buffer structure 6 near the axis together form a radial deformation reserved cavity 9 located in the splicing center area. The radial deformation reserved cavity 9 can provide sufficient space to accommodate the radial expansion of the buffer structure 6 under compression, avoiding excessive reaction force generated by the buffer structure 6 due to the inability to release its volume. This allows the buffer structure 6 to fully absorb the shock wave peaks generated by vibration on the first rotating shaft 1 or the second rotating shaft 2 through elastic deformation, significantly reducing the impact load on the first rotating shaft 1 and the second rotating shaft 2 due to vibration. The radial deformation reserved cavity 9 is cylindrical and is coaxial with the first rotating shaft 1 and the second rotating shaft 2.

[0027] It is important to emphasize that because the buffer structure 6 is made of rubber, it will expand towards the non-rigid limiting area due to the compressive force after being compressed. Without the radial deformation pre-reserved cavity 9, when the buffer structure 6 is compressed, it will expand away from the axis, meaning the end of the buffer structure 6 away from the axis will protrude beyond the outer contour of the first rotating shaft 1 and the second rotating shaft 2 due to deformation. If the first rotating shaft 1 or the second rotating shaft 2 is rotating at this time, the area of ​​the buffer structure 6 protruding beyond the outer contour of the first rotating shaft 1 and the second rotating shaft 2 will interfere with other components connected to the first rotating shaft 1 or the second rotating shaft 2. Because the buffer structure 6 is made of rubber, it follows the principle of constant volume under compression, preferentially expanding in the direction of least deformation resistance. The two sides of the buffer structure 6 are fixedly connected to the first splicing block 7 and the second splicing block 8, and are restricted from deforming to the sides by the rigid splicing blocks. The outer side corresponds to the circumferential main space of the shaft system, where the rubber component is larger. Deforming the rubber in this area requires overcoming a greater cohesive force, and the radial deformation pre-reserved cavity 9... The inner region contains less rubber, resulting in lower cohesion and no rigid components constraining it. Therefore, the radial deformation cavity 9 naturally becomes the direction with the least deformation resistance. As a result, the buffer structure 6 will preferentially expand into the radial deformation cavity 9 after being compressed. Thus, the radial deformation cavity 9 can ensure that the buffer structure 6 can fully undergo elastic deformation to absorb the shock wave peak generated by external forces, while also preventing the buffer structure 6 from expanding outward and disrupting the stability of the shaft transmission.

[0028] It also includes an axial reserved cavity 10. In the spliced ​​state, the end face of the first splicing block 7 near the second rotating shaft 2 is separated from the end face of the second rotating shaft 2 near the first rotating shaft 1, thereby forming a first axial gap 11; the end face of the second splicing block 8 near the first rotating shaft 1 is separated from the end face of the first rotating shaft 1 near the second rotating shaft 2, thereby forming a second axial gap 12. The first axial gap 11 and the second axial gap 12 can provide axial movement space for the first splicing block 7 or the second splicing block 8 when the first rotating shaft 1 or the second rotating shaft 2 is subjected to axial impact, avoiding rigid collision between the first splicing block 7 or the second splicing block 8 and the first rotating shaft 1 or the second rotating shaft 2. At the same time, the first axial gap 11 and the second axial gap 12 can also provide deformation space for the small deformation of the buffer structure 6 in the axial direction. The first axial gap 11 and the second axial gap 12 have the same size, and the two together constitute the axial reserved cavity 10.

[0029] The above are the preferred embodiments described in this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A shaft connection structure capable of resisting transient impacts, characterized in that: It includes a first rotating shaft (1) and a second rotating shaft (2), the first rotating shaft (1) and the second rotating shaft (2) have the same radius, and the second rotating shaft (2) is coaxially spliced ​​to one end of the first rotating shaft (1); a first splicing structure (3) and a second splicing structure (4) are respectively provided on the ends of the first rotating shaft (1) and the second rotating shaft (2) that are close to each other. When the first rotating shaft (1) and the second rotating shaft (2) are coaxially spliced ​​together, the first splicing structure (3) and the second splicing structure (4) cooperate with each other to form a number of structural cavities (5). Each of the structural cavities (5) contains a buffer structure (6). When the first rotating shaft (1) and the second rotating shaft (2) rotate relative to each other, the first splicing structure (3) and the second splicing structure (4) can cause each of the buffer structures (6) to deform simultaneously.

2. The shaft connection structure capable of resisting transient impacts according to claim 1, characterized in that: The first splicing structure (3) includes a plurality of first splicing blocks (7) arranged in a circular array. The radial cross section of each first splicing block (7) is fan-shaped, and each first splicing block (7) is integrally connected to the first rotating shaft (1). The second splicing structure (4) includes a plurality of second splicing blocks (8) arranged in a circular array. The radial cross section of each second splicing block (8) is consistent with the radial cross section of the first splicing block (7), and each second splicing block (8) is integrally connected to the second rotating shaft (2). The number of second splicing blocks (8) is consistent with the number of first splicing blocks (7), and the arc length distance between two adjacent second splicing blocks (8) in the circumferential direction is equal to the arc length distance between two adjacent first splicing blocks (7) in the circumferential direction.

3. A shaft connection structure capable of resisting transient impacts according to claim 2, characterized in that: After the first rotating shaft (1) and the second rotating shaft (2) are spliced ​​together along the same axis, the first splicing block (7) and the second splicing block (8) cooperate with each other to form a number of structural cavities (5) evenly distributed along the circumferential direction between the first splicing structure (3) and the second splicing structure (4); each of the structural cavities (5) is formed by the side of the adjacent first splicing block (7) and the second splicing block (8) that are close to each other and the end faces of the first rotating shaft (1) and the second rotating shaft (2) that are close to each other, and the shape of each of the structural cavities (5) is adapted to the shape of the buffer structure (6), and each of the buffer structures (6) is installed in the structural cavity (5) after it is formed.

4. A shaft connection structure capable of resisting transient impacts according to claim 3, characterized in that: Each of the buffer structures (6) is a rubber block, and the shape of each buffer structure (6) is a fan-shaped block with the same shape as the first splicing block (7) and the second splicing block (8). When the buffer structure (6) is installed into the structural cavity (5), the two sides of the buffer structure (6) are respectively fixedly connected to the side surfaces of the adjacent first splicing block (7) and the second splicing block (8) that are close to each other.

5. A shaft connection structure capable of resisting transient impacts according to claim 4, characterized in that: After the first splicing block (7), the second splicing block (8) and the buffer structure (6) are spliced ​​together, the radial cross-sectional outer contours of the three together form a complete and smooth circle; along the circumferential direction, starting from any one of the first splicing blocks (7), the first splicing block (7), the buffer structure (6) and the second splicing block (8) are arranged in sequence; and in the splicing state, the first splicing block (7), the second splicing block (8) and the buffer structure (6) at the end near the axis together form a radial deformation reserved cavity (9) located in the splicing center area; the radial deformation reserved cavity (9) is cylindrical and is coaxial with the first rotating shaft (1) and the second rotating shaft (2).

6. A shaft connection structure capable of resisting transient impacts according to claim 3, characterized in that: It also includes an axial reserved cavity (10). In the splicing state, the end face of the first splicing block (7) near the second rotating shaft (2) is separated from the end face of the second rotating shaft (2) near the first rotating shaft (1), thereby forming a first axial gap (11); the end face of the second splicing block (8) near the first rotating shaft (1) is separated from the end face of the first rotating shaft (1) near the second rotating shaft (2), thereby forming a second axial gap (12); the first axial gap (11) and the second axial gap (12) have the same size, and the two together constitute the axial reserved cavity (10).

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