Tuned mass damper and motorcycle thereof

Abstract

The utility model belongs to the technical field of motorcycles, and particularly relates to a tuned mass damper and a motorcycle thereof, the tuned mass damper comprises a damping guide main body and a tuned mass hammer body axially moving in an inner cavity of the damping guide main body, and two ends of the tuned mass hammer body are respectively and elastically matched with the inner cavity of the damping guide main body through tuning springs. One end of an inner cavity of the damping guide body is axially and movably connected with an adjusting seat, the tuning spring on the corresponding side abuts against the position between the adjusting seat and the tuning mass hammer body, and an adjusting assembly arranged on the damping guide body drives the adjusting seat to move axially. The tuned mass hammer is simple in structure and ingenious and reasonable in design, the adjusting base is driven by the adjusting assembly to conduct axial displacement so that the swing amplitude space of the tuned mass hammer body and the elastic compression amount of the two tuning springs can be directly changed, and then the damping effect can be adjusted.

Description

Technical fields:

[0001] This utility model belongs to the field of motorcycle technology, specifically referring to a tuned mass damper and its motorcycle. Background technology:

[0002] Tuned mass dampers, also known as tuned mass shock absorbers or tuned mass absorbers, were initially used as vibration control devices in high-rise buildings, bridges, and other large structures. In recent years, through cross-disciplinary technology borrowing and development, there have been designs applying tuned mass dampers to motor vehicles. A Dutch patent publication (NL2016884A) discloses a front fork assembly, front fork comprising the same, and motorcycle. This invention application describes a front fork assembly that includes a tuned mass damper fixedly attached to the non-spring portion of a telescopic unit. As shown in the accompanying drawings of the specification document, the tuned mass damper includes a mass element capable of oscillating motion parallel to the longitudinal axis.

[0003] When the motorcycle is in normal operation, the tuned mass damper can resonate with the motorcycle body through the longitudinal oscillation motion of the mass element in conjunction with the damping spring, thereby absorbing and dissipating the vibration energy of the motorcycle body, reducing the vibration response of the motorcycle body, and thus reducing the vibration and bumps during motorcycle operation, ensuring stable motorcycle operation and riding experience.

[0004] However, the damping effect of the aforementioned tuned mass damper mainly relies on the damping springs mounted on both sides of the mass element. The magnitude of the compression and rebound forces of the damping springs directly affects the damping effect of the tuned mass damper. The actual damping requirements of a motorcycle are influenced by a combination of factors, such as the motorcycle model, road conditions, racing performance, and daily driving. Therefore, it is evident that tuned mass dampers with fixed damping effects after leaving the factory are far from meeting actual needs. Summary of the Invention:

[0005] The purpose of this invention is to provide a tuned mass damper with a simple structure, ingenious and reasonable design. By adjusting the components, the adjusting seat is driven to make axial displacement, so as to directly change the swing amplitude space of the tuned mass hammer and the elastic compression of the two tuning springs, thereby realizing the adjustment of the damping and shock absorption effect.

[0006] This utility model is implemented as follows:

[0007] A tuned mass damper includes a damping guide body and a tuned mass hammer that moves axially within the cavity of the damping guide body. Both ends of the tuned mass hammer are elastically engaged with the cavity of the damping guide body via tuning springs. An adjusting seat is axially movably connected to one end of the cavity of the damping guide body. The tuning spring on the corresponding side abuts against the adjusting seat and the tuned mass hammer. An adjusting assembly mounted on the damping guide body drives the adjusting seat to move axially.

[0008] In the aforementioned tuned mass damper, the damping guide body is a cylindrical structure, and both ends of the damping guide body are equipped with fixed end caps. The adjustment assembly includes an adjustment spindle, which passes through and is movably fitted onto one of the fixed end caps. The inner end of the adjustment spindle is connected to an adjustment seat, and the outer end is connected to a power source for transmission.

[0009] In the aforementioned tuned mass damper, the adjusting main shaft includes an adjusting shaft rotatably fitted on a fixed end cover. The outer end of the adjusting shaft is connected to a power source for transmission. The inner end of the adjusting shaft and the outer end of the adjusting push rod rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjusting push rod is threadedly fitted to the fixed end cover. The inner end of the adjusting push rod is connected to an adjusting seat. The rotation of the adjusting shaft drives the adjusting push rod to rotate and move axially.

[0010] In the aforementioned tuned mass damper, the power source is an adjusting cap fitted on the outer end of the adjusting shaft. The tail end of the fastening screw passes through the adjusting cap and is screwed onto the outer end of the adjusting shaft to achieve a fixed fit between the adjusting cap and the adjusting shaft.

[0011] In the aforementioned tuned mass damper, the adjusting shaft is rotatably fitted onto the central through hole of the fixed end cover via a bushing or bearing. A radial through hole is provided on the diameter of the adjusting shaft, and positioning steel balls are placed at both ends of the radial through hole. A compression spring is provided inside the radial through hole, with its two ends respectively abutting against the corresponding positioning steel balls. An even number of positioning grooves that allow the positioning steel balls to partially enter are evenly distributed circumferentially on the side wall of the central through hole of the fixed end cover.

[0012] In the aforementioned tuned mass damper, the outer end of the adjusting push rod has a linear linkage groove, and the inner end of the adjusting shaft is a linear structure that can be axially inserted into the linear linkage groove.

[0013] In the aforementioned tuned mass damper, the inner end of the adjusting spindle is fitted through the adjusting seat, and the adjusting spindle located on the inner and outer sides of the adjusting seat is respectively provided with a limit snap ring and a positioning step surface, forming a positioning space for axially fixing the adjusting seat between the limit snap ring and the positioning step surface.

[0014] In the above-mentioned tuned mass damper, the end face of the tuned mass hammer extends outward along its axial direction to form a mounting protrusion, which is fitted with the corresponding end of the tuning spring.

[0015] Alternatively, the end face of the tuning mass hammer may be recessed inward to form a mounting groove, which allows the corresponding end of the tuning spring to be inserted and fitted.

[0016] In the aforementioned tuned mass damper, one or more adjusting shims are stacked along the axial direction of the tuned mass hammer in the mounting groove, and the corresponding end of the tuning spring abuts against the outermost adjusting shim.

[0017] Another objective of this utility model is to provide a motorcycle, including a body, including a tuned mass damper as described in any of the above claims, wherein a fixed bracket is provided on the body, and the outer wall of the damping guide body is detachably connected to the fixed bracket.

[0018] The outstanding advantages of this utility model compared to the prior art are:

[0019] This utility model has a simple structure, ingenious and reasonable design. By adjusting the components, the adjusting seat is driven to move axially, thereby directly changing the swing amplitude of the tuning mass hammer and the elastic compression of the two tuning springs, thus achieving the adjustment of the damping and shock absorption effect. Attached image description:

[0020] Figure 1 This is a perspective view of the tuned mass damper assembly with a fixed bracket according to this utility model.

[0021] Figure 2 This is a cross-sectional view of the tuned mass damper assembly of this utility model with a fixed bracket.

[0022] In the diagram: 1. Damping guide body; 2. Tuning mass hammer; 3. Tuning spring; 4. Adjusting seat; 5. Fixed end cap; 6. Adjusting spindle; 7. Adjusting shaft; 8. Adjusting push rod; 9. Adjusting cap; 10. Fastening screw; 11. Positioning ball; 12. Compression spring; 13. Limiting snap ring; 14. Assembly protrusion; 15. Assembly groove; 16. Adjusting shim; 17. Fixed bracket. Detailed implementation method:

[0023] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2:

[0024] A tuned mass damper includes a damping guide body 1 and a tuned mass hammer 2 that moves axially within the cavity of the damping guide body 1. Both ends of the tuned mass hammer 2 are elastically engaged with the cavity of the damping guide body 1 via tuning springs 3. An adjusting seat 4 is axially movably connected to one end of the cavity of the damping guide body 1. The tuning spring 3 on the corresponding side abuts against the adjusting seat 4 and the tuned mass hammer 2. An adjusting assembly mounted on the damping guide body 1 drives the adjusting seat 4 to move axially.

[0025] This utility model has a simple structure, ingenious and reasonable design. By adjusting the components, the adjusting seat 4 is driven to move axially, thereby directly changing the swing amplitude of the tuning mass hammer 2 and the elastic compression of the two tuning springs 3, thus achieving the adjustment of the damping and shock absorption effect.

[0026] Furthermore, the specific fitting structure of the adjustment component on the damping guide body 1 is as follows: the damping guide body 1 is a cylindrical structure, and both ends of the damping guide body 1 are equipped with fixed end caps 5. The adjustment component includes an adjustment main shaft 6, which passes through and is movably fitted on one of the fixed end caps 5. The inner end of the adjustment main shaft 6 is connected to the adjustment seat 4, and the outer end is connected to the power source for transmission.

[0027] The adjusting main shaft 6 can be an integral shaft structure, directly driven by the power source to perform axial extension and retraction. In this embodiment, the adjusting main shaft 6 includes an adjusting shaft 7 rotatably fitted on the fixed end cover 5. The outer end of the adjusting shaft 7 is connected to the power source for transmission. The inner end of the adjusting shaft 7 and the outer end of the adjusting push rod 8 rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjusting push rod 8 is threadedly fitted to the fixed end cover 5. The inner end of the adjusting push rod 8 is connected to the adjusting seat 4. That is, the adjusting shaft 7 rotates to drive the adjusting push rod 8 to rotate and move axially.

[0028] The power source can be a servo motor for electronic control. In this embodiment, to reasonably control costs, manual operation is adopted: the power source is an adjusting cap 9 mounted on the outer end of the adjusting shaft 7. The tail end of the fastening screw 10 passes through the adjusting cap 9 and is screwed onto the outer end of the adjusting shaft 7 to achieve a fixed fit between the adjusting cap 9 and the adjusting shaft 7. That is, the operator rotates the adjusting cap 9 to drive the adjusting shaft 7 to rotate synchronously.

[0029] Meanwhile, to facilitate rotational adjustment by the operator, the adjusting shaft 7 is rotatably fitted onto the central through hole of the fixed end cover 5 via a bushing or bearing. A radial through hole is formed on the diameter of the adjusting shaft 7, with positioning steel balls 11 placed at both ends of the radial through hole. A compression spring 12, with its two ends respectively abutting against the corresponding positioning steel ball 11, is installed inside the radial through hole. An even number of positioning grooves, allowing partial entry of the positioning steel balls 11, are evenly distributed circumferentially on the side wall of the central through hole of the fixed end cover 5. This design and fit between the positioning grooves and the positioning steel balls 11 allows the adjusting shaft 7 to form multiple adjustment positions during rotation. That is, during rotation, the positioning steel ball 11 can separate from the previous positioning groove and enter the next positioning groove, simultaneously providing feedback force to the operator to indicate that the next adjustment position has been entered.

[0030] Furthermore, in order to enable the adjusting push rod 8 to rotate synchronously with the adjusting shaft 7 and move axially relative to it, the outer end of the adjusting push rod 8 is provided with a straight linkage groove, and the inner end of the adjusting shaft 7 is a straight structure that can be axially inserted into the straight linkage groove.

[0031] Furthermore, the inner end of the adjusting spindle 6 is fitted through and into the adjusting seat 4, and the adjusting spindle 6 located on the inner and outer sides of the adjusting seat 4 is respectively provided with a limiting snap ring 13 and a positioning step surface, forming a positioning space for axially fixing the adjusting seat 4 between the limiting snap ring 13 and the positioning step surface. That is, in this embodiment, the inner end of the adjusting push rod 8 is fitted through and into the adjusting seat 4, and the limiting snap ring 13 and the positioning step surface are also correspondingly provided on the adjusting push rod 8.

[0032] In order to ensure that the tuning spring 3 can be stably fitted on the tuning mass hammer 2, in this embodiment, the end face structure of the tuning mass hammer 2 facing the adjustment seat 4 is as follows: the end face of the tuning mass hammer 2 extends outward along its axial direction to form an assembly protrusion 14, which is used for the corresponding end of the tuning spring 3 to be fitted. The corresponding adjustment seat 4 is also provided with an assembly protrusion, and the corresponding end of the tuning spring 3 is fitted on the assembly protrusion.

[0033] The end face structure of the tuning mass hammer 2 away from the adjustment seat 4 is as follows: the end face of the tuning mass hammer 2 is recessed inward to form an assembly groove 15, which is used for the corresponding end of the tuning spring 3 to be inserted and engaged. The corresponding fixed end cover 5 is also provided with an assembly groove 15 for the corresponding end of the tuning spring 3 to be inserted and engaged.

[0034] In addition, in order to further adjust the damping and shock absorption effect of the tuned mass damper, one or more adjusting shims 16 are stacked along the axial direction of the tuned mass hammer 2 in the mounting groove 15, and the corresponding end of the tuning spring 3 abuts against the outermost adjusting shim 16.

[0035] The aforementioned tuned mass damper is mounted on a motorcycle, which includes a chassis and the tuned mass damper. A fixed bracket 17 is provided on the chassis, and the outer wall of the damping guide body 1 is detachably connected to the fixed bracket 17. Furthermore, the fixed bracket 17 can be a clamp structure, securely fastened to the outer wall of the damping guide body 1 using fasteners, thereby achieving quick assembly and disassembly of the tuned mass damper from the motorcycle chassis.

[0036] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A tuned mass damper, comprising a damping guide body (1) and a tuned mass hammer (2) axially movable within the cavity of the damping guide body (1), wherein both ends of the tuned mass hammer (2) are elastically engaged with the cavity of the damping guide body (1) via tuning springs (3), characterized in that: An adjusting seat (4) is axially movably connected to one end of the inner cavity of the damping guide body (1). The tuning spring (3) on the corresponding side abuts between the adjusting seat (4) and the tuning mass hammer (2). The adjusting seat (4) is driven to move axially by the adjusting component set on the damping guide body (1).

2. A tuned mass damper according to claim 1, characterized in that: The damping guide body (1) is a cylindrical structure, and both ends of the damping guide body (1) are equipped with fixed end caps (5). The adjustment assembly includes an adjustment spindle (6), which passes through and is movably fitted on one of the fixed end caps (5). The inner end of the adjustment spindle (6) is connected to the adjustment seat (4), and the outer end is connected to the power source.

3. A tuned mass damper according to claim 2, characterized in that: The main adjusting shaft (6) includes an adjusting shaft (7) rotatably fitted on the fixed end cover (5). The outer end of the adjusting shaft (7) is connected to the power source for transmission. The inner end of the adjusting shaft (7) and the outer end of the adjusting push rod (8) rotate synchronously in the circumference and slide relative to each other in the axial direction. The adjusting push rod (8) is threadedly fitted to the fixed end cover (5). The inner end of the adjusting push rod (8) is connected to the adjusting seat (4). The adjusting shaft (7) rotates to drive the adjusting push rod (8) to rotate and move axially.

4. A tuned mass damper according to claim 3, characterized in that: The power source is an adjusting cap (9) fitted on the outer end of the adjusting shaft (7). The tail end of the fastening screw (10) passes through the adjusting cap (9) and is screwed onto the outer end of the adjusting shaft (7) to achieve a fixed fit between the adjusting cap (9) and the adjusting shaft (7).

5. A tuned mass damper according to claim 3, characterized in that: The adjusting shaft (7) is rotatably fitted on the central through hole of the fixed end cover (5) via a bushing or bearing. A radial through hole is provided on the diameter of the adjusting shaft (7). A positioning steel ball (11) is placed at both ends of the radial through hole. A compression spring (12) is provided in the radial through hole, with its two ends abutting against the corresponding positioning steel ball (11). An even number of positioning grooves that allow the positioning steel ball (11) to partially enter are evenly distributed on the side wall of the central through hole of the fixed end cover (5).

6. A tuned mass damper according to claim 3, characterized in that: The outer end of the adjusting push rod (8) has a straight linkage groove, and the inner end of the adjusting shaft (7) is a straight structure that can be axially inserted into the straight linkage groove.

7. A tuned mass damper according to claim 2, characterized in that: The inner end of the adjusting spindle (6) is fitted through the adjusting seat (4), and the adjusting spindle (6) located on the inner and outer sides of the adjusting seat (4) is respectively provided with a limit snap ring (13) and a positioning step surface, and a positioning space is formed between the limit snap ring (13) and the positioning step surface to fix the adjusting seat (4) axially.

8. A tuned mass damper according to claim 1, characterized in that: The end face of the tuning mass hammer (2) extends outward along its axial direction to form a mounting protrusion (14), which is fitted to the corresponding end of the tuning spring (3). Alternatively, the end face of the tuning mass hammer (2) is recessed inward to form a mounting groove (15), which is used for the corresponding end of the tuning spring (3) to be inserted and fitted.

9. A tuned mass damper according to claim 8, characterized in that: One or more adjusting shims (16) are stacked in the assembly groove (15) along the axial direction of the tuning mass hammer (2), and the corresponding end of the tuning spring (3) abuts against the outermost adjusting shim (16).

10. A motorcycle, comprising a chassis, characterized in that: The device includes a tuned mass damper as described in any one of claims 1-9, wherein a fixed bracket (17) is provided on the vehicle body, and the outer wall of the damping guide body (1) is detachably connected to the fixed bracket (17).

Images