Rotating shaft sealing structure
By using sealing components and bushing structures in the swing arm mechanism, the problems of connecting shaft wear and debris accumulation are solved, achieving dust and water resistance and improving the working efficiency and stability of the mechanism.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, the swing arm mechanism is prone to accumulating debris during rotation, which can lead to wear and abnormal noise on the connecting shaft, and may even cause it to jam.
The system employs a sealing assembly and bushing structure. The sealing assembly prevents dust and other debris from entering the mating area between the connecting shaft and the swing arm or bracket. The bushing acts as an intermediate layer to reduce direct contact wear and provides stable rotational support through a lubrication layer.
It effectively prevents foreign objects from entering, reduces wear, improves the working efficiency and stability of the mechanism, prevents abnormal noises and jamming, and keeps the inside clean.
Smart Images
Figure CN224033078U_ABST
Abstract
Description
Technical Field
[0001] This specification relates to the field of shaft hole sealing technology, and in particular to a rotating shaft sealing structure. Background Technology
[0002] Currently, automotive pedals generally employ a swing arm mechanism to achieve pedal retraction and extension. This swing arm mechanism typically utilizes a mature four-bar linkage to extend and retract the pedal. Through the coordinated action of two swing arms, which engage with connecting shafts within the bracket mounting holes, the swing arm mechanism drives the pedal to complete its telescopic movement.
[0003] However, in this structure, the swing arm uses a connecting shaft for engagement. During rotation, debris such as dust can easily accumulate at the engagement point, causing wear on the connecting shaft, producing abnormal noise, and even causing the swing arm and connecting shaft to jam.
[0004] Therefore, this specification provides a shaft sealing structure. Summary of the Invention
[0005] This specification provides a shaft sealing structure that solves the problems of wear on the connecting shaft and easy accumulation of debris during rotation in existing technologies.
[0006] The following technical solution is adopted in this specification:
[0007] This specification provides a rotating shaft sealing structure, including: a swing arm, a bracket, and a connecting shaft; the swing arm has a through hole, and the bracket has two mounting holes at its two ends; the connecting shaft is rotatably inserted into the through hole, and its two ends are respectively installed in the two mounting holes; the swing arm is configured to reciprocate relative to the bracket; the connecting shaft and the swing arm are clearance-fitted; sealing components are provided at both ends of the swing arm, and the sealing components are used to prevent dust from entering between the connecting shaft and the swing arm.
[0008] Based on the above technical means, when the swing arm rotates, the sealing component prevents dust and other debris from entering the mating area between the swing arm and the connecting shaft. This not only achieves dust and water protection for the swing arm mechanism, but also avoids abnormal noise caused by the accumulation of debris and prevents wear on the connecting shaft.
[0009] Furthermore, a bushing is fitted onto the connecting shaft, and the bushing is supported between the swing arm and the connecting shaft.
[0010] Based on the aforementioned technical means, the bushing, acting as an intermediate layer between the swing arm and the connecting shaft, effectively reduces wear caused by direct contact between the two. Furthermore, through the bushing, the swing arm can reciprocate relative to the support via the connecting shaft, eliminating the need for additional lubrication between the connecting shaft and the swing arm. Since the swing arm needs to reciprocate relative to the connecting shaft during operation, this movement, without the protection of the bushing, could lead to rapid wear on the surfaces of both the swing arm and the connecting shaft. The bushing provides smoother and more stable rotational support, ensuring smoother movement of the swing arm during swinging, reducing vibration or jamming caused by uneven friction, thereby improving the overall efficiency and stability of the mechanism. When used in conjunction with sealing components, the bushing helps to better prevent the ingress of external debris.
[0011] Furthermore, there are two bushings, located at both ends of the swing arm.
[0012] Based on the aforementioned technical means, the bushings and sealing components work together, located at both ends of the swing arm, forming a double sealing barrier. This further enhances the ability to prevent the ingress of external impurities such as mud and dust, improving overall sealing performance. The bushings' distribution at both ends facilitates the connection shaft's coordination with the swing arm's movement.
[0013] Furthermore, the sealing assembly has two or more annular sealing protrusions on its outer periphery, and each annular sealing protrusion is distributed at intervals along the axial direction of the sealing assembly.
[0014] Based on the aforementioned technical means, the annular sealing protrusions are distributed at intervals along the axial direction of the sealing assembly, providing independent sealing at different axial positions. Regardless of the axial pressure changes generated during the reciprocating swing of the swing arm, these sealing protrusions can function independently, ensuring a consistently stable sealing effect.
[0015] Furthermore, the bracket is provided with a cover plate corresponding to each of the mounting holes.
[0016] Based on the aforementioned technical means, the cover plate can provide additional protection for the end of the connecting shaft and the surrounding structure within the mounting hole, preventing dust, moisture, and other impurities from entering. This helps maintain the cleanliness of internal components and reduces wear or malfunctions caused by external contamination.
[0017] Furthermore, the gap between the connecting shaft and the swing arm is filled with lubricating grease.
[0018] This specification provides a rotating shaft sealing structure, including: a swing arm, a bracket, and a connecting shaft; the swing arm has a through hole, and the bracket has two mounting holes at its two ends; the connecting shaft passes through the through hole and is interference-fitted with the through hole; both ends of the connecting shaft are rotatably mounted in the two mounting holes; the swing arm is configured to reciprocate relative to the bracket; each mounting hole has a sealing component on the side near the swing arm, the sealing component being used to prevent dust from entering between the connecting shaft and the bracket; a bushing is fitted on the connecting shaft, the bushing being supported between the bracket and the connecting shaft.
[0019] Based on the aforementioned technical means, during the rotation of the swing arm, a sealing component prevents dust and other debris from entering the mating area between the bushing and the connecting shaft. This achieves dust and water protection for the swing arm mechanism and also prevents wear on the bushing and connecting shaft. As an intermediate layer between the support and the connecting shaft, the bushing effectively reduces wear caused by direct contact. Since the support needs to reciprocate relative to the connecting shaft during operation, without the protection of the bushing, this movement could lead to rapid wear on the surfaces of both the support and the connecting shaft. The bushing provides smoother and more stable rotational support, ensuring smoother movement of the support during swinging and reducing vibrations or jamming caused by uneven friction, thereby improving the overall working efficiency and stability of the mechanism. When used in conjunction with the sealing component, the bushing helps to better prevent the entry of external debris.
[0020] Furthermore, the bushing is coated with a lubricating layer.
[0021] According to the above-mentioned technical means, through the lubrication layer on the bushing, the swing arm can swing back and forth relative to the bracket via the connecting shaft, without the need for additional lubricating grease between the connecting shaft and the bracket.
[0022] Furthermore, the sealing assembly has two or more annular sealing protrusions on its outer periphery, and each annular sealing protrusion is distributed at intervals along the axial direction of the sealing assembly.
[0023] Based on the aforementioned technical means, the annular sealing protrusions are distributed at intervals along the axial direction of the sealing assembly, providing independent sealing at different axial positions. Regardless of the axial pressure changes generated during reciprocating oscillation, these sealing protrusions can function independently, ensuring a consistently stable sealing effect.
[0024] Furthermore, the bracket is provided with a cover plate corresponding to each of the mounting holes.
[0025] Based on the aforementioned technical means, the cover plate provides additional protection for the connecting shaft end and surrounding structure within the mounting hole, preventing the ingress of dust, moisture, and other impurities. This helps maintain the cleanliness of internal components and reduces wear or malfunctions caused by external contamination. By covering the mounting hole, the cover plate further enhances the overall sealing performance of the device. Especially when working in conjunction with sealing components, it can more effectively prevent the entry of external debris.
[0026] The above-mentioned technical solutions adopted in this specification can achieve the following beneficial effects:
[0027] When the swing arm rotates, the sealing component prevents mud and sand and other debris from entering the mating area between the bushing and the connecting shaft, and seals the lubricating grease in the swing arm to prevent it from evaporating. This not only makes the swing arm mechanism dustproof and waterproof, but also prevents wear on the bushing and connecting shaft. Attached Figure Description
[0028] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings:
[0029] Figure 1 This is a schematic diagram of a rotating shaft sealing structure according to the present invention;
[0030] Figure 2 This is an exploded view of a rotating shaft sealing structure according to the present invention;
[0031] Figure 3 This is a schematic diagram of the internal structure of a rotating shaft sealing structure of the present invention from a first angle;
[0032] Figure 4 This is a schematic diagram of the internal structure of a rotating shaft sealing structure of the present invention from a second angle;
[0033] Figure 5 for Figure 4 A magnified view of the corresponding internal structure.
[0034] Figure label:
[0035] 1-Swing arm; 11-Through hole;
[0036] 2-Bracket; 21, 22-Mounting holes;
[0037] 3-Connecting shaft;
[0038] 4-Sealing assembly; 41-Annular sealing protrusion;
[0039] 5-Bushing;
[0040] 6-Cover plate.
[0041] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without creative effort are within the scope of protection of this application.
[0043] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.
[0044] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0045] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.
[0046] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.
[0047] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0048] Figure 1 The diagram shown is a structural schematic of a vehicle's pedals. Figure 2 for Figure 1 An exploded view of the vehicle's pedals shows two swing arms 1, two brackets 2, and four connecting shafts 3, with each swing arm 1 having two connecting shafts 3 inserted through it.
[0049] Further, Example 1
[0050] refer to Figure 2 and Figure 3 As shown, a pivot sealing structure, which is part of a vehicle pedal, includes a swing arm 1, a bracket 2, and a connecting shaft 3. The swing arm 1 has two through holes 11, and the bracket 2 has two mounting holes 21 and 22 at its two ends respectively. Therefore, the connecting shaft 3 rotatably passes through the through holes 11, and its two ends can be respectively installed in the two mounting holes 21 and 22. In this structure, the swing arm 1 can be configured to reciprocate relative to the bracket 2, thereby achieving the retraction and deployment function of the vehicle pedal.
[0051] The connecting shaft 3 and the swing arm 1 are clearance-fitted, with a gap existing between them. To further prevent dust and other external debris from entering the gap, sealing components 4 are provided at both ends of the swing arm 1. These sealing components 4 prevent dust and other contaminants from entering the space between the connecting shaft and the swing arm (equivalent to the gap).
[0052] like Figure 3 The rotating shaft sealing structure shown prevents dust and other debris from entering the mating area between the swing arm 1 and the connecting shaft 3 when the swing arm 1 rotates, thus achieving dust and water protection for the swing arm mechanism.
[0053] In addition, in one or more embodiments of this specification, the gap between the connecting shaft 3 and the swing arm 1 is filled with lubricating grease. The lubricating grease facilitates the reciprocating swing of the swing arm 1 relative to the bracket 2. Of course, the sealing assembly 4 can be an oil seal assembly to seal the lubricating grease and prevent its evaporation.
[0054] In one or more embodiments of this specification, a bushing 5 is fitted onto the connecting shaft 3, and the bushing 5 supports the swing arm 1 and the connecting shaft 3. The bushing 5, acting as an intermediate layer between the swing arm 1 and the connecting shaft 3, effectively reduces wear caused by direct contact between the two. Furthermore, due to the bushing 5's characteristic of facilitating lubrication between the swing arm 1 and the connecting shaft 3, the swing arm 1 can reciprocate relative to the bracket 2 via the connecting shaft 3, achieving lubrication between the connecting shaft 3 and the swing arm 1 without the need for additional lubricating grease. Since the swing arm 1 needs to reciprocate relative to the connecting shaft 3 during operation, this movement, without the protection of the bushing 5, could lead to rapid wear on the surfaces of the swing arm 1 and the connecting shaft 3. The presence of the bushing 5 provides smoother and more stable rotational support, ensuring smoother movement of the swing arm 1 during swinging, reducing vibration or jamming caused by uneven friction, thereby improving the overall working efficiency and stability of the mechanism. When used in conjunction with the sealing assembly 4, the bushing 5 helps to better retain lubricating grease inside the swing arm 1, preventing leakage and blocking the entry of external debris.
[0055] It is worth noting that there are two bushings 5, located at both ends of the rocker arm 1. The bushings 5 work in conjunction with the sealing assembly 4, forming a double sealing barrier at both ends of the rocker arm 1. This further enhances the ability to prevent the ingress of external impurities such as mud and dust, while also better preventing lubricating grease leakage, thus improving overall sealing performance. The bushings 5 distributed at both ends contribute to the uniform distribution of lubricating grease inside the rocker arm 1. The presence of the bushings 5 at both ends restricts the flow range of the lubricating grease, ensuring it remains concentrated within the through hole 11, thus maintaining good lubrication between the connecting shaft 3 and the rocker arm 1 at all times.
[0056] In one or more embodiments of this specification, the sealing assembly 4 has two or more annular sealing protrusions 41 formed on its outer periphery, and each annular sealing protrusion 41 is spaced apart along the axial direction of the sealing assembly 4. The annular sealing protrusions 41, spaced apart along the axial direction of the sealing assembly 4, can provide independent sealing at different axial positions. Regardless of the axial pressure changes generated during the reciprocating swing of the swing arm 1, these annular sealing protrusions 41 can function independently, ensuring a consistently stable sealing effect.
[0057] In one or more embodiments of this specification, cover plates 6 are provided on the bracket 2 corresponding to mounting holes 21 and 22 to cover the mounting holes 21 and 22 respectively. The cover plates 6 provide additional protection for the connecting shaft end and surrounding structure within the mounting holes, preventing dust, moisture, and other impurities from entering. This helps maintain the cleanliness of internal components and reduces wear or malfunctions caused by external contamination.
[0058] Example 2
[0059] refer to Figure 2 and Figure 4 As shown, a rotating shaft sealing structure includes a swing arm 1, a bracket 2, and a connecting shaft 3. Two through holes 11 are formed on the swing arm 1, and two mounting holes 21 and 22 are correspondingly formed at both ends of the bracket 2. The connecting shaft 3 passes through the through holes 11, and the connecting shaft 3 is interference-fitted with the through holes 11. Both ends of the connecting shaft 3 are rotatably mounted in the two mounting holes 21 and 22, respectively.
[0060] The swing arm 1 is configured to reciprocate relative to the bracket 2. The connecting shaft 3 is clearance-fitted with the bracket 2, and a gap exists between the connecting shaft 3 and the bracket 2 within mounting holes 21 and 22. This gap can be filled with lubricating grease. Each mounting hole 21, 22 has a sealing component 4 on the side closest to the swing arm 1. The sealing component 4 prevents dust from entering between the connecting shaft 3 and the bracket 2, and seals the lubricating grease within the two mounting holes 21, 22 (corresponding to the gap) when filled with lubricating grease, preventing grease evaporation. A bushing 5 is fitted onto the connecting shaft 3, supporting the bracket 2 between the connecting shaft 3 and the connecting shaft 3. Two bushings 5 are provided, located at opposite ends of the connecting shaft 3.
[0061] It is worth noting that, in Figure 3 The gap between the connecting shaft 3 and the bracket 2 is not shown in the image, but this does not affect the existence of a gap filled with lubricating grease between the connecting shaft 3 and the bracket 2, which is not shown due to limitations in the image representation.
[0062] like Figure 4 The rotating shaft sealing structure shown in the figure prevents dust and other debris from entering the mating area between the bracket 2 and the connecting shaft 3 when the rotating shaft 2 rotates at the gap between the bracket 2 and the connecting shaft 3 through the sealing component 4. It can also seal the lubricating grease in the bracket 2 (i.e., the gap) to prevent it from evaporating. This can achieve dust and water protection for the swing arm mechanism, and also prevent abnormal noise after the lubricating grease evaporates, and prevent wear on the connecting shaft 3.
[0063] The bushing 5, acting as an intermediate layer between the bracket 2 and the connecting shaft 3, effectively reduces wear caused by direct contact between the two. Since the bracket 2 needs to reciprocate relative to the connecting shaft 3 during operation, without the protection of the bushing 5, this movement could lead to rapid wear on the surfaces of both the bracket 2 and the connecting shaft 3. The bushing 5 provides smoother and more stable rotational support, ensuring smoother movement of the bracket 2 during its oscillation, reducing vibration or jamming caused by uneven friction, thereby improving the overall efficiency and stability of the mechanism. When used in conjunction with the sealing assembly 4, the bushing 5 helps to better retain lubricating grease inside the bracket mounting hole, preventing leakage and blocking the entry of external debris.
[0064] Furthermore, in one or more embodiments of this specification, a lubricating layer is applied to the bushing 5. Through the lubricating layer on the bushing 5, the swing arm 1 can reciprocate relative to the bracket 2 via the connecting shaft 3, eliminating the need for additional lubricating grease between the connecting shaft 3 and the bracket 2.
[0065] In one or more embodiments of this specification, such as Figure 5 As shown, the sealing assembly 4 has two or more annular sealing protrusions 41 formed on its outer periphery, and the annular sealing protrusions 41 are distributed at intervals along the axial direction of the sealing assembly 4. The effect of forming annular sealing protrusions on the sealing assembly can be referred to the effect of annular sealing protrusions in Embodiment 1 above, and will not be repeated here.
[0066] In one or more embodiments of this specification, the bracket 2 is provided with a cover plate 6 corresponding to each mounting hole 21, 22, and the cover plate 6 can be combined with the sealing assembly 4 to seal the lubricating grease. The cover plate 6 can provide additional protection for the end of the connecting shaft and the surrounding structure inside the mounting hole, preventing dust, moisture and other impurities from entering. This helps to keep the internal components clean and reduce wear or failure caused by external contamination. By covering the mounting hole, the cover plate 6 can further improve the sealing performance of the entire device. Especially when working together with the sealing assembly 4, it can more effectively prevent the evaporation of lubricating grease while preventing the entry of external debris.
[0067] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.
Claims
1. A shaft sealing structure, characterized in that, include: Swing arm (1), bracket (2) and connecting shaft (3); A through hole (11) is formed on the swing arm (1), and two mounting holes (21, 22) are formed at both ends of the bracket (2). The connecting shaft (3) is rotatably inserted into the through hole (11), and both ends of the connecting shaft (3) are respectively installed in the two mounting holes (21, 22); The swing arm (1) is configured to swing back and forth relative to the bracket (2); The connecting shaft (3) and the swing arm (1) are fitted with a clearance. The swing arm (1) is provided with sealing components (4) at both ends. The sealing components (4) are used to prevent dust from entering between the connecting shaft (3) and the swing arm (1).
2. The shaft sealing structure as described in claim 1, characterized in that, A bushing (5) is fitted on the connecting shaft (3), and the bushing (5) is supported between the swing arm (1) and the connecting shaft (3).
3. The shaft sealing structure as described in claim 2, characterized in that, There are two bushings (5), located at both ends of the swing arm (1).
4. The shaft sealing structure as described in claim 1, characterized in that, The sealing assembly (4) has two or more annular sealing protrusions (41) formed on its outer periphery, and each of the annular sealing protrusions (41) is distributed at intervals along the axial direction of the sealing assembly (4).
5. The shaft sealing structure as described in claim 1, characterized in that, The bracket (2) is provided with a cover plate (6) corresponding to each of the mounting holes (21, 22).
6. The shaft sealing structure as described in claim 1, characterized in that, The gap between the connecting shaft (3) and the swing arm (1) is filled with lubricating grease.
7. A shaft sealing structure, characterized in that, include: Swing arm (1), bracket (2) and connecting shaft (3); A through hole (11) is formed on the swing arm (1), and two mounting holes (21, 22) are formed at both ends of the bracket (2). The connecting shaft (3) passes through the through hole (11) and is press-fitted with the through hole (11); the two ends of the connecting shaft (3) are respectively rotatably installed in the two mounting holes (21, 22); The swing arm (1) is configured to swing back and forth relative to the bracket (2); Each of the mounting holes (21, 22) is provided with a sealing component (4) on the side near the swing arm (1). The sealing component (4) is used to prevent dust from entering between the connecting shaft (3) and the bracket (2). A bushing (5) is fitted on the connecting shaft (3), and the bushing (5) is supported between the bracket (2) and the connecting shaft (3).
8. A shaft sealing structure as described in claim 7, characterized in that, The bushing (5) is coated with a lubricating layer.
9. A shaft sealing structure as described in claim 7, characterized in that, The sealing assembly (4) has two or more annular sealing protrusions (41) formed on its outer periphery, and each of the annular sealing protrusions (41) is distributed at intervals along the axial direction of the sealing assembly (4).
10. A shaft sealing structure as described in claim 7, characterized in that, The bracket (2) is provided with a cover plate (6) corresponding to each of the mounting holes (21, 22).