A shock-absorbing connection structure for a beach vehicle

Abstract

This application relates to the field of ATV technology, specifically to a shock-absorbing connection structure for an ATV, including a frame, a suspension, and a shock-absorbing device; the suspension is hinged to the frame, and the shock-absorbing device is disposed between the suspension and the frame, with one end hinged to the suspension and the other end hinged to the frame; the shock-absorbing device includes an inner rod, an outer rod, and a piston; the piston is fixed to the inner rod so that a first floating oil chamber is formed between the piston and a first end of a first channel; a protective member is fixed to the inner rod and slides and seals with the outer rod along the axial direction; the protective member forms a closed second floating oil chamber, which communicates with the first floating oil chamber through a gap; an elastic member is used to provide elastic force so that the inner rod and the outer rod tend to move away from each other along the axial direction; the flow of lubricating oil does not require additional power, but rather partially converts the force generated by the shock-absorbing device during the shock absorption process into energy to propel the flow of lubricating oil.

Description

Technical Field

[0001] This application relates to the field of beach buggy technology, specifically to a shock-absorbing connection structure for a beach buggy. Background Technology

[0002] ATVs, also known as all-terrain vehicles, are a type of transportation that can adapt to various terrains and are widely used in daily life, especially in tourist attractions such as beaches, where they are often used as a means of transportation for tourists.

[0003] Because ATVs often need to travel on complex and bumpy roads, shock absorbers are typically connected to the frame for vibration damping. Generally, the existing ATV shock absorber connection structure involves the suspension hinged to the frame, connecting to the wheel assembly, and the shock absorber connecting between the frame and suspension to support the suspension and provide shock absorption. Currently, the most common ATV shock absorber devices are telescopic rods and springs surrounding the telescopic rods. The telescopic rods act as a connecting component to the frame and also guide the spring's extension and retraction. For details on this ATV shock absorber connection structure, please refer to the following related technologies:

[0004] The shock absorption connection structure of the ATV is disclosed in announcement number CN218703482U.

[0005] A shock absorption structure for an ATV is disclosed in announcement number CN217496314U.

[0006] While this shock-absorbing connection structure can effectively reduce vehicle vibration, it still has shortcomings in practical use. Specifically, its telescopic rod typically consists of two interlocking rods connected by a linear bearing, allowing for axial relative extension and contraction. However, in complex road conditions, such as sandy terrain, ATVs kick up significant amounts of dust during operation. If this dust enters the linear bearing through the joint between the two rods, it affects the smoothness of the relative extension and contraction of the two rods and can also exacerbate wear on the linear bearing, thus reducing its lifespan. Therefore, further improvements are needed.

[0007] Application content

[0008] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide a shock-absorbing connection structure for a beach buggy.

[0009] To achieve the above objectives, this application provides the following technical solution:

[0010] A shock-absorbing connection structure for a beach buggy, characterized in that it includes a frame, a suspension, and a shock-absorbing device; the suspension is hinged to the frame, and the shock-absorbing device is disposed between the suspension and the frame, with one end hinged to the suspension and the other end hinged to the frame.

[0011] The shock absorption device includes:

[0012] Inner rod;

[0013] The outer rod has an axially extending channel inside, the channel including a first channel and a second channel that are axially connected; the inner rod passes through the first channel via a bearing, and there is a gap between the inner rod and the first channel;

[0014] The piston, fixed to the inner rod, can slide axially in a sealed manner in the second channel, so that a first floating oil chamber is formed between the piston and the first end of the first channel;

[0015] The protective component is fixed to the inner rod and sleeved on the outer rod, and slides and seals with the outer rod along the axial direction; the protective component at least partially covers the second end of the first channel and forms a closed second floating oil cavity, the second floating oil cavity communicating with the first floating oil cavity through the gap, so that lubricating oil can flow between the first floating oil cavity and the second floating oil cavity through the gap;

[0016] An elastic element is used to provide an elastic force that causes the inner and outer rods to tend to move away from each other along the axial direction;

[0017] The inner rod and the outer rod, one of which has its outer end hinged to the frame, and the other has its outer end hinged to the suspension.

[0018] Compared with existing technologies, the advantages of this solution are:

[0019] Firstly, this solution incorporates protective components that seal the second end of the first channel, thus blocking the gap between the outer and inner rods. This prevents sand and dust from entering the gap between the outer and inner rods and affecting the bearing's operation when the ATV is traveling on dusty surfaces (such as beaches), thereby improving the bearing's lifespan.

[0020] Secondly, the protective component in this design also forms a second floating oil chamber on the end side of the inner rod, which, together with the first floating oil chamber formed by the piston in the first channel, allows the lubricating oil in the two floating oil chambers to flow back and forth through the gap, thereby lubricating the bearing.

[0021] It is worth noting that the power driving the lubricating oil to flow within the two floating oil chambers is provided by the shock absorber itself, requiring no external power. Specifically:

[0022] When this shock absorber is installed on an ATV, it activates when the vehicle vibrates, causing the inner and outer rods to reciprocate axially. As the inner and outer rods move towards each other, the second floating oil chamber is gradually compressed, while the first floating oil chamber gradually expands, pushing the lubricating oil in the second floating oil chamber through the gap to the first floating oil chamber. Conversely, as the inner and outer rods move away from each other, the first floating oil chamber is gradually compressed, while the second floating oil chamber gradually expands, causing the lubricating oil in the first floating oil chamber to flow through the gap to the second floating oil chamber under its own weight and the piston's thrust. This cycle repeats, propelling the lubricating oil back and forth between the two floating oil chambers to lubricate the bearings.

[0023] As can be seen, in this solution, the flow of lubricating oil does not require additional power; instead, the force generated by the damping device during the damping process is partially converted into energy to propel the flow of lubricating oil.

[0024] Furthermore, it is understandable that flowing lubricating oil has advantages over stagnant lubricating oil in the following ways:

[0025] Firstly, the flowing lubricating oil has a certain hydraulic pressure. Under the action of hydraulic pressure, the lubricating oil can better enter some assembly gaps for lubrication, such as the gaps in the bearing where bearing balls are installed.

[0026] Furthermore, the lubricating oil has a certain scouring force during its flow in the gap between the inner rod and the first channel, which can wash away some oil stains adhering to the outer peripheral wall of the inner rod, preventing the oil stains from accumulating in large quantities on the outer peripheral wall of the inner rod.

[0027] As an optional embodiment of this application, the outer peripheral wall of the inner rod is at least partially recessed inward to form a buffer area; in the initial state, the buffer area is located between the first end of the first channel and the bearing.

[0028] As an optional implementation of this application, the buffer area is arranged around the outer circumference of the inner rod to form a ring-shaped buffer area.

[0029] As an optional embodiment of this application, a diaphragm capable of elastic deformation is fixed on the outer peripheral wall of the inner rod, and the diaphragm closes the opening side of the buffer area.

[0030] As an optional embodiment of this application, the protective component includes a sleeve and a base plate fixed to one end of the sleeve; the sleeve is sleeved over the outside of the outer rod and has a sliding sealing fit with the outer rod; the base plate is located on the opposite side of the second end of the first channel and is fixed to the inner rod to form the second floating oil cavity between the base plate and the second end of the first channel.

[0031] As an optional embodiment of this application, a sealing element is provided between the sleeve and the outer rod to achieve a sliding sealing fit between the sleeve and the outer rod.

[0032] As an optional embodiment of this application, the second channel further includes a pressure relief space; the pressure relief space is isolated from the first floating oil chamber by a piston; the pressure relief space has a pressure relief channel communicating with the external environment.

[0033] As an optional implementation of this application, the pressure relief channel is opened on the side wall of the pressure relief space, or the pressure relief channel is opened on the inner rod, with one end of the pressure relief channel communicating with the pressure relief space and the other end communicating with the external environment.

[0034] As an optional embodiment of this application, the elastic element includes a spring; both the outer rod and the inner rod are provided with stops, the spring is sleeved on the inner rod and the outer rod, and the two ends of the spring are respectively fixed to and / or abut against the two stops; and / or the elastic element includes a spring, the spring is located in the second floating oil cavity and sleeved on the inner rod, and the two ends of the spring are respectively fixed to or abut against the end of the outer rod and the end of the protective member.

[0035] As an optional embodiment of this application, the junction of the first channel and the second channel has a stepped surface that limits the piston to a lower position. In the initial state, under the elastic force of the elastic member, the piston abuts against the stepped surface; and / or the second channel is provided with a limiting block for limiting the piston to a higher position.

[0036] Other advantages and effects of this application are explained in detail in the Detailed Description and Drawings sections. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of this application;

[0038] Figure 2 This is a schematic diagram of the vibration damping device of this application;

[0039] Figure 3 This is an exploded view of the vibration damping device of this application;

[0040] Figure 4 This is a schematic diagram of the protective component of this application assembled with the inner rod.

[0041] Figure 5 This is a cross-sectional view of the outer rod of this application;

[0042] Figure 6 This is a cross-sectional view of the vibration damping device of this application in its initial state;

[0043] Figure 7 This is a cross-sectional view of the piston in the upper limit position of this application;

[0044] Figure 8 for Figure 5 A partial schematic diagram;

[0045] Figure 9 This is a schematic diagram of the deformation process of the diaphragm under stress in this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of this application and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this application.

[0047] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” that indicate orientation or positional relationship are used only for the convenience of describing the embodiments and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Example 1

[0049] ATVs, also known as all-terrain vehicles, are typically equipped with shock absorbers to reduce the bumps and jolting experienced when driving on complex terrain.

[0050] Based on this, please refer to Figure 1 As shown, this embodiment provides a shock-absorbing connection structure for an ATV, mainly including a frame M, a suspension A1, and a shock-absorbing device; wherein, the frame M is the main body of the ATV, one end of the suspension A1 is hinged to the frame M, and the other end is movably connected to the wheel assembly M1 of the ATV; the shock-absorbing device A2 mainly provides shock absorption for the ATV, specifically, one end of the shock-absorbing device A2 is hinged to the frame M, and the other end is hinged to the suspension A1, and the shock-absorbing device A2 supports and absorbs the suspension A1.

[0051] Combination Figure 2-9 As shown, the shock absorption device A2 includes: inner rod 2, outer rod 1, piston 4, protective component 5, and elastic component.

[0052] The inner rod 2 and the outer rod 1 interlock to form an axially extendable telescopic rod structure. In this embodiment, the axial direction can be understood as the length direction of the entire shock absorber, or the axial direction of the inner rod 2 and the outer rod 1. Specifically, in the connection, the outer end of one of the inner rod 2 and the outer rod 1 is hinged to the vehicle frame M, and the outer end of the other is hinged to the suspension A1, for example... Figure 1 The illustration shows a configuration where the outer end of the outer rod 1 is hinged to the frame M, and the outer end of the inner rod 2 is hinged to the suspension A1.

[0053] The elastic element is located between the inner rod 2 and the outer rod 1 to provide elastic force so that the inner rod 2 and the outer rod 1 tend to move away from each other along the axial direction. It can also be understood that in the initial state, that is, when the shock absorber is not subjected to external force, the force exerted by the elastic element on the inner rod 2 and the outer rod 1 is in opposite directions. In some embodiments, the elastic element may be a spring 3.

[0054] by Figure 6 Taking the perspective direction as an example, the force exerted by the elastic element on the outer rod 1 is upward, and the force exerted on the inner rod 2 is downward. When the ATV is bumpy, the inner rod 2 and the outer rod 1 move axially relative to each other against the elastic force of the elastic element (i.e., they contract relative to each other). Then, when the ATV is stable, the elastic element returns to its original position, pushing the inner rod 2 and the outer rod 1 away from each other (i.e., they extend relative to each other), so that the shock absorption device returns to its original position. This alternating action allows the elastic element to absorb the impact force of the ATV when it is bumpy, thus achieving the purpose of shock absorption.

[0055] In other words, when the ATV is traveling on bumpy roads, the shock absorption device is activated to achieve the purpose of shock absorption. During the shock absorption process, the inner rod 2 and the outer rod 1 reciprocate relative to each other along the axial direction. That is, the telescopic rod composed of the inner rod 2 and the outer rod 1 reciprocates and extends, which provides power for the subsequent flow of lubricating oil in this embodiment.

[0056] like Figure 2 and Figure 3 As shown, the outer rod 1 and the inner rod 2 each have a connecting seat at their ends that are far apart from each other. The two connecting seats are used to connect to the vehicle frame.

[0057] For the purpose of differentiation, in this embodiment, the connecting seat at the end of the outer rod 1 is referred to as the first connecting seat 10, and the connecting seat at the end of the inner rod 2 is referred to as the second connecting seat 20.

[0058] In some embodiments, when the shock absorber is installed on the ATV, such as Figure 1 As shown, the inner rod 2 is located below the outer rod 1, that is, the first connecting seat 10 is in a higher position than the second connecting seat 20. The first connecting seat 10 is hinged to the frame M, and the second connecting seat 20 is hinged to the suspension A1.

[0059] In some other alternative embodiments, the inner rod 2 may be located above the outer rod 1, that is, the inner rod 2 is positioned above the outer rod 1. Figure 6 The view shown is rotated 180°, at which point the first connecting seat 10 is in a lower position than the second connecting seat 20; the specific position can be selected according to actual needs.

[0060] like Figure 5 As shown, the outer rod 1 has an axially extending channel inside, wherein the end of the channel away from the first connecting seat 10 is an open structure, which serves as the insertion port for the inner rod 2 to be inserted into the channel.

[0061] The channel includes a first channel 11 and a second channel 12 that are axially connected, that is, the channel forms a first channel 11 and a second channel 12 that are axially connected in sequence along the axial direction, wherein the first channel 11 is located on the side away from the first connecting seat 10.

[0062] like Figure 6 and Figure 7 As shown, the first channel 11 is mainly used as a bearing mounting area for mounting bearings 111. The inner rod 2 passes through the bearings 111 in the first channel 11. The bearings 111 can be linear bearings, and there can be one or more bearings. Preferably, two bearings 111 are used, and the two bearings 111 are arranged sequentially along the axial direction of the first channel 11. The inner rod 2 passes through both bearings 111 and is guided and supported by the two bearings 111.

[0063] In addition, such as Figure 7 As shown, there is a gap 112 between the inner rod 2 and the first channel 11, that is, there is a certain gap 112 between the outer peripheral wall of the inner rod 2 and the peripheral wall of the first channel 11 to allow lubricating oil to flow.

[0064] It is worth noting that when the inner rod 2 and the outer rod 1 extend and retract relative to each other, they mainly rely on the bearing 111 for support and guidance. Therefore, the flexibility of the bearing 111 directly affects the smoothness of the extension and retraction of the telescopic rod. Thus, it is sometimes necessary to add lubricating oil to the bearing 111 to lubricate the bearing 111 and the inner rod 2.

[0065] Based on this, in this embodiment, as Figure 7 As shown, piston 4 is fixed to inner rod 2. For example, piston 4 is directly fixed to the end of inner rod 2 away from second connecting seat 20. In addition, piston 4 is disposed in second channel 12, and its radial cross section is adapted to the radial cross section of second channel 12, so that piston 4 can slide axially in second channel 12 in a sealed manner. Here, sealed sliding can be understood as piston 4 being able to slide axially in second channel 12, and ensuring that during the sliding process, the peripheral wall of piston 4 and the peripheral wall of second channel 12 are always in contact to maintain a seal.

[0066] In this embodiment, the piston 4 can be made of a flexible material such as rubber or silicone. The piston 4 slides in the second channel 12 in a sealed manner by the contact and sliding between the peripheral wall of the piston 4 and the peripheral wall of the second channel 12. Its mating structure is similar to the mating of the piston 4 and the syringe barrel of a syringe.

[0067] like Figure 7As shown, the piston 4 divides the second channel 12 into two isolated spaces. The space closer to the first end of the first channel 11 (which can also be understood as the side closer to the bearing 111) is the first floating oil chamber 121, and the other space constitutes the pressure relief space 122.

[0068] It can also be understood that the first floating oil chamber 121 is formed between the piston 4 and the first end of the first channel 11.

[0069] The first floating oil chamber 121 and the pressure relief space 122 are isolated from each other by the piston 4. It is understood that the volumes of the first floating oil chamber 121 and the pressure relief space 122 are not constant; they are both capable of floating, primarily due to the axial movement of the piston 4. For example, with... Figure 7 Taking the perspective shown as an example, when the piston 4 moves upward, the first floating oil chamber 121 gradually expands and its volume gradually increases, while the pressure relief space 122 gradually compresses and its volume gradually decreases; conversely, when the piston 4 moves downward, the volume of the first floating oil chamber 121 gradually decreases and the volume of the pressure relief space 122 gradually increases.

[0070] The protective component 5 is fixed to the inner rod 2 and is sleeved on the outer rod 1, and slides and seals with the outer rod 1 along the axial direction. In this embodiment, the sliding and sealing fit means that the protective component 5 can slide relative to the outer rod 1 along the axial direction, and can also ensure that its fit position with the outer rod 1 is in a sealed state.

[0071] like Figure 7 As shown, the protective component 5 at least partially covers the second end of the first channel 11 and forms a closed second floating oil cavity 50. The second end of the first channel 11 can also be understood as the end of the first channel 11 that is away from the second channel 12.

[0072] In some embodiments, the second floating oil cavity 50 may be specifically formed as follows: Figure 3 and Figure 7 As shown, the protective component 5 includes a sleeve 51 and a base plate 52 fixed to one end of the sleeve 51; the radial section of the sleeve 51 is adapted to the radial section of the end side of the outer rod 1.

[0073] The base plate 52 is fixed to the end of the sleeve 51 away from the first connecting seat 10 to close that end of the base plate 52, that is, the base plate 52 is located on the opposite side of the second end of the first channel 11. The inner rod 2 is coaxially fixedly inserted through the base plate 52 so that the base plate 52 and the inner rod 2 can move axially synchronously.

[0074] The sleeve 51 is fitted over the outer rod 1 and slides in a sealing fit with the outer rod 1, for example, as... Figure 8As shown, a sealing element 501 is provided between the sleeve 51 and the outer rod 1. The sliding sealing fit between the sleeve 51 and the outer rod 1 is achieved through the sealing element 501. The sealing element 501 can be a sealing ring or a mechanical seal, etc. Taking the sealing ring as an example, it is fixedly nested at the lower end of the outer rod 1 and abuts against the inner circumferential wall of the sleeve 51.

[0075] In order to reduce the friction between the sleeve 51 and the outer rod 1, in some embodiments, the inner peripheral wall of the sleeve 51 and the outer peripheral wall of the outer rod 1 are fitted with a clearance.

[0076] Thus, as Figure 7 As shown, the lower end of the sleeve 51, the bottom plate 52, the inner rod 2, and the outer rod 1 together form the second floating oil cavity 50. The second floating oil cavity 50 is connected to the first floating oil cavity 121 through the gap 112, so that the lubricating oil can flow between the first floating oil cavity 121 and the second floating oil cavity 50 through the gap 112.

[0077] In this embodiment, the first floating oil chamber 121 and the second floating oil chamber 50 mainly serve as storage spaces for lubricating oil. For example, a certain amount of lubricating oil is injected into the second floating oil chamber 50 in advance. Specifically, the amount of oil injected can be: in the initial state, the level of lubricating oil in the second floating oil chamber 50 is preferably at the position of 1 / 2 to 3 / 4 above the bottom of the second floating oil chamber 50. Of course, the second floating oil chamber 50 can also be filled with lubricating oil.

[0078] It is understandable that in this embodiment, the volume of the second floating oil chamber 50 is not constant; it changes with the movement of the inner rod 2. Initially, as... Figure 6 In the state shown, the volume of the second floating oil chamber 50 is at its maximum. As the inner rod 2 moves upward (i.e., retracts into the outer rod 1), the protective member 5 moves upward synchronously, thereby compressing the second floating oil chamber 50 and causing the volume of the second floating oil chamber 50 to gradually decrease. Conversely, when the inner rod 2 moves downward, the volume of the second floating oil chamber 50 gradually increases.

[0079] As can be seen, in this embodiment, the protective component 5 is equivalent to a lower piston, while the piston 4 in the second channel 12 is equivalent to an upper piston; as the ATV moves, the inner rod 2 and the outer rod 1 will extend and retract relative to each other, thereby causing the protective component 5 and the piston 4 to move synchronously, for example:

[0080] by Figure 6Taking the perspective direction as an example, in the initial state, the inner rod 2 and the outer rod 1 are at their maximum relative extension length, at which time the volume of the second floating oil chamber 50 is at its maximum. As the beach buggy bounces, the inner rod 2 moves upward relative to the outer rod 1, thereby driving the protective part 5 to move upward. At the same time, the piston 4 also moves upward in the second channel 12. Thus, the volume of the second floating oil chamber 50 gradually decreases, and the volume of the first floating oil chamber 121 gradually increases. Thus, a pressure difference will gradually form between the first floating oil chamber 121 and the second floating oil chamber 50, making the pressure in the first floating oil chamber 121 less than the pressure in the second floating oil chamber 50. At the same time, the base plate 52 will push the lubricating oil in the first floating oil chamber 121 upward. With the effect of the aforementioned pressure difference, the lubricating oil in the first floating oil chamber 121 can flow into the second floating oil chamber 50 through the gap 112. When the lubricating oil passes through the gap 112, it can contact the bearing 111 to lubricate the bearing 111.

[0081] When the elastic force of spring 3 drives the inner rod 2 and outer rod 1 to reset, that is, as Figure 7 As shown, the inner rod 2 moves downward relative to the outer rod 1, and the protective member 5 moves downward along with the inner rod 2. At the same time, the piston 4 also moves downward synchronously. In this way, the volume of the second floating oil chamber 50 gradually increases, and the volume of the first floating oil chamber 121 gradually decreases. Thus, the lubricating oil in the first floating oil chamber 121, under its own weight and the downward push of the piston 4, gradually flows downward through the gap 112 into the second floating oil chamber 50. During this process, the lubricating oil flowing through the gap 112 can contact the bearing 111 to lubricate the bearing 111.

[0082] As the inner rod 2 and the outer rod 1 move back and forth axially in an alternating manner, the lubricating oil can flow back and forth between the first floating oil chamber 121 and the second floating oil chamber 50 to lubricate the bearing 111.

[0083] It is evident that the flow of lubricating oil does not require additional power; instead, it partially converts the force generated by the damping device during the damping process into kinetic energy that propels the flow of lubricating oil.

[0084] Furthermore, it is understandable that flowing lubricating oil has advantages over stagnant lubricating oil in the following ways:

[0085] Firstly, the flowing lubricating oil has a certain hydraulic pressure. Under the action of hydraulic pressure, the lubricating oil can better enter some assembly gaps for lubrication, such as the gaps in the bearing 111 where the bearing 111 balls are installed.

[0086] Furthermore, during the flow of lubricating oil through the gap 112 between the inner rod 2 and the first channel 11, it has a certain scouring force, which can wash away some oil stains adhering to the outer peripheral wall of the inner rod 2, preventing the oil stains from accumulating in large quantities on the outer peripheral wall of the inner rod 2.

[0087] In this embodiment, the pressure relief space 122 has a pressure relief channel 21 that communicates with the external environment. The significance of setting up the pressure relief channel 21 is as follows:

[0088] The main purpose is to balance the air pressure above piston 4 in the second channel 12, thereby reducing the resistance when piston 4 moves upward; this can be understood as follows:

[0089] like Figure 7 As shown, if there is no pressure relief channel 21, the pressure relief space 122 is equivalent to a closed space. As the piston 4 moves upward, the volume of the pressure relief space 122 gradually decreases, which will cause the air pressure in the pressure relief space 122 to gradually increase, thus generating a large resistance to the piston 4 and hindering the piston 4 from moving upward.

[0090] After the pressure relief channel 21 is set up, the pressure relief space 122 can be connected to the external environment through the pressure relief channel 21, so that the air pressure in the pressure relief space 122 always tends to the external air pressure. In this way, the air pressure in the pressure relief space 122 will not be too high and will not generate a large resistance to the piston 4.

[0091] The pressure relief channel 21 can be specifically formed as follows: Figure 7 As shown, the pressure relief channel 21 is opened on the inner rod 2, and at least part of it extends along the axial direction of the inner rod 2. One end of the pressure relief channel 21 passes through the piston 4 and communicates with the pressure relief space 122, while the other end communicates with the external environment. The end of the pressure relief channel 21 that communicates with the external environment is located outside the protective member 5.

[0092] This design ensures that the pressure relief space 122 is connected to the external environment and allows airflow to pass through the inner rod 2 during the pressure relief process, thus providing some heat dissipation to the inner rod 2.

[0093] For example, when piston 4 moves upward, piston 4 compresses the pressure relief space 122, causing the airflow in the pressure relief space 122 to flow out to the outside environment through the pressure relief channel 21; when piston 4 moves downward, the pressure relief space 122 gradually expands, its volume increases, and its internal air pressure decreases, thereby causing the outside airflow to flow into the pressure relief space 122 through the pressure relief channel 21; this cycle repeats, so that the outside airflow and the airflow in the pressure relief space 122 can continuously flow through the pressure relief channel 21. When the airflow flows through the pressure relief channel 21, it will absorb the heat inside the inner rod 2 to achieve heat dissipation of the inner rod 2.

[0094] Of course, in some other alternative implementations (not shown in the figure), a through hole can be opened on the top sidewall of the pressure relief space 122 as a pressure relief channel 21.

[0095] The specific installation of spring 3 can be any one of the following two forms or a combination of both.

[0096] Form 1: Both the outer rod 1 and the inner rod 2 have stop blocks 7 fixed on their outer peripheral walls, such as... Figure 2 As shown, the spring 3 is sleeved on the inner rod 2 and the outer rod 1, and both ends of the spring 3 are fixed to or abut against the two stops 7 respectively. In the initial state, the spring 3 is in a certain compressed state.

[0097] Form 2 (not shown in the figure): The spring is located in the second floating oil chamber 50 and sleeved on the inner rod 2. The two ends of the spring are fixed or abutted to the end of the outer rod 1 (i.e. the end of the outer rod 1 near the bottom plate 52) and the end of the protective member 5 (i.e. the bottom plate 52), respectively. This installation form allows the spring to be hidden inside the protective member 5.

[0098] In order to keep the inner rod 2 and the outer rod 1 in their initial state, such as Figure 5 As shown, the junction of the first channel 11 and the second channel 12 has a stepped surface 82 that limits the lower position of the piston 4. For example, the radial cross-section of the first channel 11 is smaller than the radial cross-section of the second channel 12, so that the stepped surface 82 is formed between them; in the initial state, as Figure 6 As shown, under the elastic force of the elastic element, the piston 4 abuts against the stepped surface 82 to achieve the lower limit of the piston 4. The lower limit can be understood as restricting the piston 4 from continuing to move downward from the initial position.

[0099] Similarly, in order to limit the maximum stroke of the axial relative contraction between the inner rod 2 and the outer rod 1, i.e., the upper limit of the piston 4, such as... Figure 5 As shown, the second channel 12 is provided with a limiting block 81 for upper limit control of the piston 4. (As indicated...) Figure 7 As shown, when piston 4 moves upward and comes into contact with limit block 81, piston 4 cannot continue to move upward under the restriction of limit block 81, so as to achieve the upper limit.

[0100] Furthermore, to prevent sand and dust from entering the gap between the inner peripheral wall of the sleeve 51 and the outer peripheral wall of the outer rod 1, in some embodiments, such as Figure 3 and Figure 7 As shown, an annular scraper 6 is provided at the top of the sleeve 51. The scraper 6 can be made of rubber and is fixed to the top of the sleeve 51 and sleeved on the outer rod 1. The inner ring of the scraper 6 abuts against the outer peripheral wall of the outer rod 1. At this time, the scraper acts as a seal to reduce the amount of sand and dust entering the aforementioned gap.

[0101] Moreover, the scraper 6 moves axially back and forth with the sleeve 51 to scrape the outer peripheral wall of the outer rod 1, thereby scraping off some sand and dust impurities attached to the outer peripheral wall of the outer rod 1.

[0102] Example 2

[0103] In Example 1, as Figure 4 As shown, the radial cross-sectional area of ​​the first floating oil chamber 121 is smaller than that of the second floating oil chamber 50. Since the piston 4 and the protective member 5 move synchronously in the axial direction, when the protective member 5 and the piston 4 are axially displaced by the same distance, the volume of the second floating oil chamber 50 that is compressed will be greater than the volume of the first floating oil chamber 121 that is expanded. Thus, in the initial state, when the oil volume in the second floating oil chamber 50 is relatively full, the amount of lubricating oil output by the second floating oil chamber 50 per unit time is greater than the amount of oil that the first floating oil chamber 121 can receive. This will result in a large hydraulic pressure (or oil pressure) in the two floating oil chambers, which is not conducive to the relative axial movement of the inner rod 2 and the outer rod 1. If the oil pressure is too high, it may even cause the lubricating oil to be squeezed and leaked from the sealing position of the piston 4 into the pressure relief space 122.

[0104] Based on this, this embodiment is further improved on the basis of embodiment 1:

[0105] In the beach buggy shock absorption device provided in this embodiment, such as Figure 3 As shown, at least part of the outer peripheral wall of the inner rod 2 is recessed inward to form a buffer area 22, and the radially outward side of the buffer area 22 is an open structure.

[0106] And in the initial state, such as Figure 6 As shown, the buffer area 22 is located between the first end of the first channel 11 (i.e., the upper end of the first channel 11) and the bearing 111. This can be understood as follows: if only one bearing 111 is used, then in the initial state, the buffer area 22 is located between the first end of the first channel 11 and the bearing 111; if multiple bearings 111 are used, then in the initial state, the buffer area 22 is located between the first end of the first channel 11 and the bearing 111 closest to the first end of the first channel 11.

[0107] The reason for placing the buffer zone 22 between the first end of the first channel 11 and the bearing 111 is to ensure that the lubricating oil can pass through the entire bearing 111 when flowing between the two floating oil chambers, so as to lubricate the bearing 111.

[0108] The function of the buffer zone 22 is to provide a space for buffering lubricating oil and temporarily receiving lubricating oil. At this time, the oil storage volume on the side where the first floating oil chamber 121 is located is equivalent to the sum of the volume of the first floating oil chamber 121 and the volume of the buffer zone 22. For ease of explanation, this is referred to as the merged oil chamber. In this way, when the inner rod 2 moves axially, the amount of oil output by the first floating oil chamber 121 is basically less than or equal to the amount of oil that the merged oil chamber can receive. This avoids the problem of excessive oil pressure caused by the large difference between the output oil volume and the received oil volume of the two floating oil chambers.

[0109] To increase the volume of cache 22, in some embodiments, such as Figure 3 As shown, the buffer area 22 is formed by wrapping around the outer circumference of the inner rod 2 to form a ring-shaped buffer area 22, which is equivalent to the outer peripheral wall of the inner rod 2 forming a recessed area around it to constitute the buffer area 22.

[0110] Although the buffer zone 22 can buffer the oil, it also has some problems: because the gap 112 between the inner rod 2 and the first channel 11 is small, the oil buffered in the recessed area is difficult to flow out quickly and into the second floating oil chamber 50 when the piston 4 moves downward.

[0111] Therefore, in some embodiments, such as Figure 4 As shown, an elastically deformable diaphragm 23 is fixed to the outer peripheral wall of the inner rod 2, such as a diaphragm 23 made of elastic band material or rubber material; to accommodate the annular buffer area 22, in some embodiments, the diaphragm 23 has a ring-shaped structure, and the diaphragm 23 is fixedly fitted into the buffer area 22 of the inner rod 2, closing the opening side of the buffer area 22, such as... Figure 9 The state shown.

[0112] Thus, when the second floating oil chamber 50 outputs lubricating oil to the first floating oil chamber 121, under the pressure of the lubricating oil, it will drive the diaphragm 23 to deform radially inward toward the interior of the recessed area (e.g., Figure 9 As shown, this recessed area can also provide space to buffer lubricating oil. When the first floating oil chamber 121 outputs lubricating oil to the second floating oil chamber 20, the lubricating oil in the first floating oil chamber 121 will flow downward into the second floating oil chamber 50 under its own weight and the push of the piston 4. During this process, the oil pressure at the diaphragm 23 will decrease, so the diaphragm 23 will begin to return to its original position radially outward under its own elasticity. During the return process, the diaphragm 23 will bulge the oil in the buffer area 22 to accelerate the flow of oil to the second floating oil chamber 50.

[0113] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this application.

Claims

1. A shock-absorbing connection structure for a beach buggy, characterized in that, It includes a frame, a suspension and a shock absorber; the suspension is hinged to the frame, and the shock absorber is located between the suspension and the frame, with one end hinged to the suspension and the other end hinged to the frame; The shock absorption device includes: Inner rod; The outer rod has an axially extending channel inside, the channel including a first channel and a second channel that are axially connected; the inner rod passes through the first channel via a bearing, and there is a gap between the inner rod and the first channel; The piston, fixed to the inner rod, can slide axially in a sealed manner in the second channel, so that a first floating oil chamber is formed between the piston and the first end of the first channel; The protective component is fixed to the inner rod and sleeved on the outer rod, and slides and seals with the outer rod along the axial direction; the protective component at least partially covers the second end of the first channel and forms a closed second floating oil cavity, the second floating oil cavity communicating with the first floating oil cavity through the gap, so that lubricating oil can flow between the first floating oil cavity and the second floating oil cavity through the gap; An elastic element is used to provide an elastic force that causes the inner and outer rods to tend to move away from each other along the axial direction; The inner rod and the outer rod, one of which has its outer end hinged to the frame, and the other has its outer end hinged to the suspension.

2. The shock-absorbing connection structure for a beach buggy according to claim 1, characterized in that, The outer peripheral wall of the inner rod is at least partially recessed inward to form a buffer area; in the initial state, the buffer area is located between the first end of the first channel and the bearing.

3. The shock-absorbing connection structure for a beach buggy according to claim 3, characterized in that, The buffer zone is arranged around the outer circumference of the inner rod to form a ring-shaped buffer zone.

4. A shock-absorbing connection structure for a beach buggy according to claim 2 or 3, characterized in that, A diaphragm capable of elastic deformation is fixed to the outer peripheral wall of the inner rod, and the diaphragm closes the opening side of the buffer area.

5. The shock-absorbing connection structure for a beach buggy according to claim 1, characterized in that, The protective component includes a sleeve and a base plate fixed to one end of the sleeve; the sleeve is fitted over the outside of the outer rod and has a sliding sealing fit with the outer rod; the base plate is located on the opposite side of the second end of the first channel and is fixed to the inner rod to form the second floating oil cavity between the base plate and the second end of the first channel.

6. The shock-absorbing connection structure for a beach buggy according to claim 5, characterized in that, A sealing element is provided between the sleeve and the outer rod to achieve a sliding sealing fit between the sleeve and the outer rod.

7. The shock-absorbing connection structure for a beach buggy according to claim 1, characterized in that, The second channel also includes a pressure relief space; the pressure relief space is isolated from the first floating oil chamber by a piston; the pressure relief space has a pressure relief channel that communicates with the external environment.

8. The shock-absorbing connection structure for a beach buggy according to claim 7, characterized in that, The pressure relief channel is located on the side wall of the pressure relief space or on the inner rod. One end of the pressure relief channel is connected to the pressure relief space, and the other end is connected to the external environment.

9. The shock-absorbing connection structure for a beach buggy according to claim 7, characterized in that, The elastic element includes a spring; both the outer rod and the inner rod are provided with stops, the spring is sleeved on the inner rod and the outer rod, and the two ends of the spring are fixed and / or abut against the two stops respectively; and / or the elastic element includes a spring, the spring is located in the second floating oil chamber and sleeved on the inner rod, and the two ends of the spring are fixed or abut against the end of the outer rod and the end of the protective element respectively.

10. The shock-absorbing connection structure for a beach buggy according to claim 1, characterized in that, The junction of the first channel and the second channel has a stepped surface that limits the piston to a lower position. In the initial state, the piston abuts against the stepped surface under the elastic force of the elastic element; and / or the second channel is provided with a limiting block for limiting the piston to a higher position.

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