Front shock absorber for a swingarm trike

Abstract

The utility model provides a kind of front shock absorption of swing arm type tricycle, it is related to the technical field of tricycle, mainly for solving the problem that existing swing arm type front shock absorption easily leads to left and right swing and inclination of front wheel.The front shock absorption of the utility model is mainly composed of front fork, swing arm, shock absorber and front wheel axle, left lug and right lug are provided on the front fork, and the clamping structure for circumferentially holding front wheel axle is provided on the swing arm, and the clamping structure is provided with clamping force by bolt.The utility model is provided with the clamping structure for circumferentially holding front wheel axle on swing arm, changes the installation mode of front wheel axle, and front wheel axle will not appear circumferential rotation and axial movement.The clamping structure can rigidly connect left swing arm, right swing arm and front wheel axle together, so that two swing arms can swing synchronously, completely solve the problem that front wheel will appear left and right swing and inclination.In addition, the utility model can naturally adjust the interval of left and right swing arms, avoid the situation that left and right swing arms appear to be retracted or extended.

Description

Technical Field

[0001] This utility model is specifically a rocker arm type front shock absorber for tricycles, relating to the field of tricycle technology. Background Technology

[0002] Currently, there are two main types of front shock absorbers used in three-wheeled motorcycles: linear shock absorbers and rocker arm shock absorbers (also known in the industry as Han's shock absorbers). Linear shock absorbers use the same structure as two-wheeled motorcycle shock absorbers, which suffers from structural inconsistencies and oil leaks, and are only suitable for lightly loaded three-wheeled motorcycles. Rocker arm shock absorbers mainly consist of a front fork, rocker arm, shock absorber, and front wheel axle (for specific structure details, refer to patent CN201559773U). They are characterized by a reasonable structure, high load-bearing capacity, and good shock absorption, making them suitable for various types of three-wheeled motorcycles.

[0003] Referring to Figure 1, the existing rocker arm type front shock absorber has a mounting hole on the left rocker arm 4 and right rocker arm 5. During assembly, the front wheel axle 7 needs to be inserted into the mounting hole and the locking nut 7.3 tightened. The front wheel is installed by axially clamping the front wheel hub 8 and the hub cap 9. However, in actual application, it has been found that after the three-wheeled motorcycle has been driven for a period of time, the front wheel will wobble and tilt, seriously affecting the driving safety of the three-wheeled motorcycle. The reason for this is that during the operation of the three-wheeled motorcycle, in addition to overcoming the load-bearing capacity, the front shock absorber also has to overcome the huge lateral force brought to the front wheel and front shock absorber by vehicle bumps and turns. This lateral force causes the two rocker arms to produce slight swings of different amplitudes, which in turn causes the front wheel axle 7 to rotate slightly and the locking nut 7.3 to loosen. The front wheel will wobble and tilt due to the axial clearance. In addition, a bushing 7.4 for positioning the front wheel is installed on the front wheel axle 7. Due to the error in the machining dimensions, the left rocker arm 4 and the right rocker arm 5 may be retracted or extended, which not only affects the swing of the rocker arm, but also easily causes wear on the hinge joint.

[0004] The patent with authorization announcement number CN205365950U discloses a front wheel axle of a rocker arm type front shock absorber for a three-wheeled vehicle. This patent improves the connection structure between the front wheel axle and the mounting hole. Although this improvement can effectively improve the anti-loosening performance of the locking nut, it is not enough to rigidly connect the two rocker arms to the front wheel axle as one unit and completely solve the problem of left and right swaying and tilting of the front wheel. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a rocker arm type front shock absorber for tricycles, the purpose of which is to completely solve the problem of left and right swaying and tilting of the front wheel in the prior art.

[0006] The present invention adopts the following technical solution: A rocker arm type front shock absorber for a tricycle mainly consists of a front fork, a rocker arm, a shock absorber, and a front wheel axle. The front fork is provided with a left support lug and a right support lug, and the rocker arm is provided with a clamping structure for circumferentially gripping the front wheel axle. The clamping structure is provided with clamping force by bolts.

[0007] Further improvements to the technical solution: The front shock absorber of the rocker arm tricycle mainly consists of a front fork, a left rocker arm, a right rocker arm, a left shock absorber, a right shock absorber, and a front wheel axle. The left shock absorber is hinged between the left support lug and the left rocker arm, and the right shock absorber is hinged between the right support lug and the right rocker arm.

[0008] Further improvements to the technical solution: The front shock absorber of the rocker arm tricycle mainly consists of a front fork, a left shock absorber, a right shock absorber, a U-shaped rocker arm, and a front wheel axle. The left shock absorber is hinged between the left support lug and the left arm of the U-shaped rocker arm, and the right shock absorber is hinged between the right support lug and the right arm of the U-shaped rocker arm.

[0009] Further improvement of the technical solution: The clamping structure is composed of an opening groove and bolts, wherein the bolts are screwed into the opening of the opening groove.

[0010] Further improve the technical solution: The clamping structure is composed of two separate parts connected by bolts.

[0011] Further improvement of the technical solution: The front wheel axle is a stepped axle, with a thicker axle body A and a thinner axle body B.

[0012] Further improve the technical solution: The cross-sectional shape of shaft A and shaft B is circular or polygonal.

[0013] Further improvement to the technical solution: A locking nut is screwed onto the end of shaft B.

[0014] Further improve the technical solution: a hub cover positioning block is set on the clamping structure.

[0015] Further improve the technical solution: The rocker arm is equipped with a hinge joint consisting of a spherical bearing, a spacer and an end cap.

[0016] After implementing the above technical solution, compared with the prior art, the present invention can produce the following beneficial effects: 1. This utility model has a clamping structure on the rocker arm for circumferentially gripping the front wheel axle, which changes the installation method of the front wheel axle and prevents the front wheel axle from rotating circumferentially or moving axially.

[0017] 2. The clamping structure rigidly connects the left and right rocker arms to the front axle, allowing the two rocker arms to swing synchronously. If the lateral force on the front wheel is too large, causing a slight deviation in the swing amplitude of the two rocker arms, the clamping structure of the front axle and the torsional elasticity of the front axle will allow the front wheel to quickly return to center, completely solving the problem of left-right swaying and tilting of the front wheel.

[0018] 3. This utility model can naturally adjust the distance between the left and right rocker arms, avoiding the situation where the left and right rocker arms retract or extend outward. Attached Figure Description

[0019] Figure 1 shows an assembly diagram of the rocker arm, front axle, front hub, and hub cap of an existing rocker arm type front shock absorber.

[0020] Figure 2 shows a schematic diagram of the overall structure of this utility model in Embodiment 1.

[0021] Figure 3 shows an assembly diagram of the left rocker arm, right rocker arm, and front wheel axle.

[0022] Figure 4 shows an exploded view of Figure 3.

[0023] Figure 5 shows a schematic diagram of the front wheel mounting structure.

[0024] Figure 6 shows a cross-sectional schematic diagram of the hinge structure in Figure 3.

[0025] Figure 7 shows a partial structural schematic diagram of the present invention in Embodiment 2.

[0026] Figure 8 shows a schematic diagram of the front wheel axle.

[0027] Figure 9 shows a schematic diagram of the overall structure of this utility model in Embodiment 3.

[0028] Figures 10-11 show the overall structural schematic diagram of the present invention in Embodiment 4.

[0029] In the attached diagram: 1. Front fork; 1.1. Left lug; 1.2. Right lug; 2. Left shock absorber; 3. Right shock absorber; 4. Left swingarm; 4.1. Clamping structure; 4.2. Bolt; 4.3. Positioning block; 4.4. Hinge joint; 4.41. Joint bearing; 4.42. Spacer; 4.43. End cap; 5. Right swingarm; 6. U-shaped swingarm; 7. Front axle; 7.1. Axle body A; 7.2. Axle body B; 7.3. Lock nut; 7.4. Bushing; 8. Front hub; 9. Hub cap. Detailed Implementation

[0030] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] A rocker-arm type front shock absorber for tricycles relates to the field of tricycle technology and is mainly used to solve the problem that existing rocker-arm type front shock absorbers easily cause the front wheel to wobble from side to side. The following is an example illustrating the composition of this utility model. Example 1

[0032] Referring to Figure 2, the front shock absorber of the rocker arm tricycle in this embodiment mainly consists of a front fork 1, a left rocker arm 4, a right rocker arm 5, a left shock absorber 2, a right shock absorber 3, and a front wheel axle 7. A left lug 1.1 and a right lug 1.2 are provided on the front fork 1. The left shock absorber 2 is hinged between the left lug 1.1 and the left rocker arm 4, and the right shock absorber 3 is hinged between the right lug 1.2 and the right rocker arm 5. Unlike existing rocker arms, a clamping structure for circumferentially gripping the front wheel axle 7 is provided at the rear end of the left rocker arm 4 and the right rocker arm 5. This clamping structure is provided with clamping force by bolts.

[0033] Referring to Figures 3 and 4, the clamping structure 4.1 in this embodiment consists of an opening slot and a bolt 4.2. The bolt 4.2 is screwed into the opening of the opening slot. Tightening the bolt 4.2 narrows the opening, thereby locking the front wheel axle 7 within the opening slot. This clamping structure is widely used, often for fixing shaft-like parts. Its characteristics include a large clamping force, making it difficult for shaft-like parts to rotate circumferentially or move axially.

[0034] Unlike existing front axles, the front axle 7 of this invention is a stepped axle, with a thicker diameter axle body A7.1 on the right and a thinner diameter axle body B7.2 on the left. A locking nut 7.3 is screwed to the end of axle body B7.2. Correspondingly, the clamping structure 4.1 on the right rocker arm 5 has a thicker diameter opening groove, while the clamping structure 4.1 on the left rocker arm 4 has a thinner diameter opening groove.

[0035] Referring to Figure 5, a front wheel hub 8 and a hubcap 9 are mounted on the front wheel axle 7. During assembly, the front wheel axle 7 is inserted into the two open slots from right to left. First, tighten the locking nut 7.3, then tighten the bolt 4.2 on the clamping structure of the left rocker arm 4, and finally tighten the bolt 4.2 on the clamping structure of the right rocker arm 5. A positioning block 4.3 is provided on the clamping structure of the left rocker arm 4. The positioning block 4.3 is engaged in the slot of the hubcap 9 to prevent the hubcap 9 from rotating during braking.

[0036] Compared to the mounting structure that uses a 7-axis clamping mechanism for the front axle hub, this mounting structure has the following advantages: 1. The clamping structure has a large clamping force and high reliability, and the bolts are not easy to loosen; 2. The way the front axle is fixed has been changed, so the front axle will not rotate circumferentially or move axially; 3. Axial positioning of the front wheel is achieved by tightening the lock nut, so that the front wheel will not wobble from side to side even if the lock nut is loose; 4. The clamping structure can rigidly connect the left and right rocker arms to the front wheel axle, and the two rocker arms swing synchronously, so that the front wheel will not wobble or tilt. 5. No bushing is needed to adjust the distance between the left and right rocker arms. The distance between the left and right rocker arms can be adjusted naturally during the tightening of the bolts on the right rocker arm clamp structure, avoiding the two rocker arms from retracting or expanding outward.

[0037] Compared to linear front shock absorbers, the advantage of swingarm front shock absorbers is that the swingarm, front wheel (load), and shock absorber form a lever structure. The shock absorber is only subjected to axial force, resulting in better damping and less oil leakage. The hinge structure between the swingarm and the fork is another key aspect of swingarm front shock absorbers. In existing technology, the swingarm and fork are usually hinged using bushings. However, bushings often experience axial movement and radial wobble during use, severely affecting the service life of swingarm front shock absorbers. Therefore, it is necessary to design a more reliable and longer-lasting hinge structure.

[0038] Referring to Figure 6, in this embodiment, a hinge joint 4.4, consisting of a spherical bearing 4.41, a spacer 4.42, and an end cap 4.43, is provided at the front end of the rocker arm. The spacer 4.42 is positioned between the two spherical bearings 4.41, and the end cap 4.43 is positioned on the outer side of the two spherical bearings 4.41. After tightening the bolts, the inner and outer rings of the spherical bearings 4.41 can be axially positioned and pre-tightened to prevent axial clearance in the hinge joint 4.4. Example 2

[0039] Referring to Figures 7 and 8, this embodiment differs from Embodiment 1 in that the cross-sectional shape of axle A7.1 and axle B7.2 on the front wheel axle 7 is hexagonal, and the cross-sectional area of ​​axle A7.1 is larger than that of axle B7.2. Correspondingly, the clamping structure 4.1 on the left rocker arm 4 and the right rocker arm 5 adopts a split bayonet design. The two split bayonets are connected together by bolts 4.2, locking axle A7.1 and axle B7.2 in place. The advantage of this design is that even if bolts 4.2 loosen, they can prevent the front wheel axle 7 from rotating.

[0040] It is worth noting that the cross-sections of shafts A7.1 and B7.2 can also be other shapes that can prevent rotation. Example 3

[0041] In Example 1, the fork tube has two bends and is generally lightning-shaped. The shock absorber, rocker arm, and front wheel axle 7 are located at the lower rear of the fork tube 1.

[0042] Referring to Figure 8. In this embodiment, the fork tube has only one bend. The shock absorber, rocker arm, and front wheel axle 7 are located at the lower front part of the fork 1. Clamping structures 4.1 for circumferentially gripping the front wheel axle 7 are provided on the left rocker arm 4 and the right rocker arm 5. Obviously, this structure can also achieve the same shock absorption effect as in Embodiment 1. Example 4

[0043] Referring to Figures 9 and 10, this embodiment differs from Embodiment 3 in that the front shock absorber of the rocker arm tricycle mainly consists of a front fork 1, a left shock absorber 2, a right shock absorber 3, a U-shaped rocker arm 6, and a front wheel axle 7. The left shock absorber 2 is hinged between the left support lug 1.1 and the left arm of the U-shaped rocker arm 6, and the right shock absorber 3 is hinged between the right support lug 1.2 and the right arm of the U-shaped rocker arm 6. A clamping structure 4.1 for circumferentially gripping the front wheel axle 7 is provided at the ends of the left and right arms.

[0044] Compared to the two independent rocker arms in Examples 1-3, the U-shaped rocker arm 6 is an integral structure, which can force the left and right arms to swing synchronously when the three-wheeled motorcycle is in motion. In particular, the U-shaped rocker arm 6 is connected to the front wheel axle 7 through the clamping structure 4.1 to form a ring-shaped closed body, which can greatly improve the overall rigidity and prevent the front wheel from swaying or tilting.

[0045] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rocker arm type front shock absorber for a tricycle, mainly composed of a front fork, a rocker arm, a shock absorber, and a front wheel axle, wherein a left support lug and a right support lug are provided on the front fork, characterized in that: The rocker arm is equipped with a clamping structure for circumferentially gripping the front wheel axle, and the clamping force is provided by bolts.

2. The rocker arm type front shock absorber for a tricycle as described in claim 1, characterized in that: The front shock absorber of the rocker arm tricycle mainly consists of a front fork, a left rocker arm, a right rocker arm, a left shock absorber, a right shock absorber, and a front wheel axle. The left shock absorber is hinged between the left support lug and the left rocker arm, and the right shock absorber is hinged between the right support lug and the right rocker arm.

3. The rocker arm type front shock absorber for a tricycle as described in claim 1, characterized in that: The front shock absorber of the rocker arm tricycle mainly consists of a front fork, a left shock absorber, a right shock absorber, a U-shaped rocker arm, and a front wheel axle. The left shock absorber is hinged between the left support lug and the left arm of the U-shaped rocker arm, and the right shock absorber is hinged between the right support lug and the right arm of the U-shaped rocker arm.

4. A rocker-arm type front shock absorber for a tricycle as described in claim 1, 2, or 3, characterized in that: The clamping structure consists of an opening slot and bolts, wherein the bolts are screwed into the opening of the opening slot.

5. A rocker-arm type front shock absorber for a tricycle as described in claim 1, 2, or 3, characterized in that: The clamp structure consists of two separate parts connected by bolts.

6. The rocker arm type front shock absorber for a tricycle as described in claim 1, characterized in that: The front axle is a stepped axle, with a thicker axle body A and a thinner axle body B.

7. The rocker arm type front shock absorber for a tricycle as described in claim 6, characterized in that: The cross-sectional shapes of shafts A and B are circular or polygonal.

8. A rocker-arm type front shock absorber for a tricycle as described in claim 6 or 7, characterized in that: A lock nut is screwed onto the end of shaft B.

9. The rocker arm type front shock absorber for a tricycle as described in claim 1, characterized in that: A hub cover positioning block is provided on the clamping structure.

10. The rocker arm type front shock absorber for a tricycle as described in claim 1, characterized in that: The rocker arm is equipped with a hinge joint consisting of a spherical bearing, a spacer, and an end cap.

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