Multi-point contact sealing piston dust cover and brake
By using a piston dust cover with a multi-point contact seal in the brake, multiple sealing parts are used to seal with the piston and cavity in a multi-point contact seal, forming a multi-layer sealing area, which solves the problem of poor sealing of traditional brakes, achieving better sealing effect and longer service life.
Patent Information
- Application Number
- CN202422632026.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The sealing between the piston and the cavity of a traditional brake is poor, causing debris to enter the cavity, causing rust, motion stagnation and reduced efficiency.
A piston dust cover with multi-point contact seal is adopted. The inner ring of the dust cover is equipped with multiple sealing parts and sealing connections with the piston, and the outer ring is sealing connections with the inner wall of the cavity to form a multi-layer sealing area, and the elastic material and reinforcement frame are used to improve the sealing effect.
It improves the sealing between the piston and the cavity, prevents water, dust and other debris from entering, avoids rust, motion stuck and efficiency reduction, and extends the service life of the product.
Smart Images
Figure CN223136768U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of brakes, and particularly relates to a piston dust cover with multi-point contact sealing and a brake. Background Art
[0002] A brake is a device that has functions such as decelerating, stopping, or maintaining a stopped state of a moving part (or moving machinery), also known as a brake. For a vehicle brake, components such as a piston are arranged in the cavity of the caliper, and the piston moves along the cavity of the caliper. To ensure that the functions and strength of the brake meet the design requirements throughout its life cycle, a dust cover is needed to seal between the piston and the cavity of the caliper, blocking the contact between the inside and outside of the cavity of the caliper body, such as preventing foreign matters such as water and dust from entering the inside of the cavity of the caliper body, and avoiding failure problems such as rusting, movement jamming, and efficiency reduction. However, the traditional dust cover and piston adopt single-point spherical contact sealing or cylindrical surface contact sealing, such as an O-ring seal. Due to factors such as part size accuracy, assembly error, and piston movement, it is easy to cause poor sealing and result in foreign matters entering the inside of the cavity of the caliper body, and then problems such as rusting, movement jamming, and efficiency reduction occur. Summary of the Utility Model
[0003] The purpose of this application is to provide a piston dust cover with multi-point contact sealing and a brake, improving the sealing performance between the piston and the cavity where it moves, preventing foreign matters such as water and dust from entering the inside of the cavity, and avoiding problems such as rusting, movement jamming, and efficiency reduction.
[0004] To solve at least one of the above technical problems, the technical solution of this application is as follows:
[0005] According to the first aspect of this application, there is provided a piston dust cover with multi-point contact sealing for a brake, including: a dust cover body, the dust cover body is annular, the dust cover body is used to be sleeved between the piston of the brake and the cavity where the piston moves, a plurality of sealing parts for sealing connection with the piston are arranged on the inner ring of the dust cover body, the plurality of sealing parts are arranged in sequence along the axial direction of the dust cover body and are all annular, each sealing part is coaxial with the dust cover body and protrudes towards the axis direction of the dust cover body, and the outer ring of the dust cover body is used for sealing connection with the inner wall of the cavity.
[0006] In a possible implementation of the above first aspect, the dust cover body is made of an elastic material, a first annular groove body matching with the inner ring of the dust cover body is arranged on the outer circumferential surface of the piston, and each sealing part is sealingly connected with the bottom surface of the first annular groove body. As the piston reciprocates linearly along the cavity, the inner ring of the dust cover body moves together with the piston and the outer ring of the dust cover body is fixed.
[0007] In a possible implementation of the above first aspect, the inner ring of the dust cover body is connected to its inner ring through a corrugated portion, and the corrugated portion elastically deforms to move the inner ring of the dust cover body while the outer ring of the dust cover body is fixed.
[0008] In a possible implementation of the above first aspect, a second annular groove is provided at the connection between the inner ring of the dust cover body and the corrugated portion, and the second annular groove is coaxial with the dust cover body.
[0009] In a possible implementation of the above first aspect, a first reinforcing skeleton is provided inside the outer ring of the dust cover body, and the first reinforcing skeleton is annular and coaxial with the dust cover body.
[0010] In a possible implementation of the above first aspect, the first reinforcing skeleton is a metal skeleton.
[0011] In a possible implementation of the above first aspect, a limiting portion for cooperating with the cavity is provided on the outer ring of the dust cover body, and a supporting portion for cooperating with the limiting portion is provided on the inner wall of the cavity.
[0012] In a possible implementation of the above first aspect, the limiting portion is annular and coaxial with the cavity.
[0013] In a possible implementation of the above first aspect, a second reinforcing skeleton for cooperating with the supporting portion is provided on the limiting portion.
[0014] According to the second aspect of the present application, a brake is provided, including the piston dust cover with multi-point contact sealing described above.
[0015] The above technical solutions of the present application have at least one of the following beneficial effects:
[0016] According to the piston dust cover with multi-point contact sealing of the present application, the piston dust cover includes an annular dust cover body. When the dust cover body is sleeved between the piston of the brake and the cavity where the piston moves, the inner ring of the dust cover body is hermetically connected to the piston through a plurality of sealing portions, and the outer ring of the dust cover body is hermetically connected to the inner wall of the cavity. The plurality of sealing portions are arranged in sequence along the axial direction of the dust cover body and are all annular. Each sealing portion is coaxial with the dust cover body and protrudes towards the axis direction of the dust cover body, thereby realizing the sealing between the piston and the cavity. Thus, the piston dust cover with multi-point contact sealing of the present application adopts a plurality of sealing portions to make multi-point contact sealing with the piston, forming a multi-layer sealing area, effectively improving the sealing performance between the piston and the cavity, having a good sealing effect, preventing impurities such as water and dust from entering the inside of the cavity, avoiding problems such as rusting, movement jamming and efficiency decline, better protecting the corresponding components, and extending the service life of the product, etc.
[0017] In addition, for the brake according to the present application, the piston dust cover with the above-mentioned multi-point contact seal is adopted. The piston dust cover uses multiple sealing parts to make multi-point contact seals with the piston, forming a multi-layer sealing area, effectively improving the sealing performance between the piston and the cavity, having a good sealing effect, preventing sundries such as water and dust from entering the interior of the cavity, avoiding problems such as rusting, movement jamming, and efficiency decline, better protecting the corresponding components, and extending the service life of the product, etc.
[0018] In addition, in the technical solution of the present application, unless otherwise specifically stated, this technical solution can be implemented by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 It is a partial cross-sectional view of the piston dust cover with multi-point contact seal according to an embodiment of the present application;
[0021] Figure 2 It is a schematic structural diagram of the piston dust cover with multi-point contact seal according to an embodiment of the present application;
[0022] Figure 3 It is an assembly schematic diagram of the piston dust cover with multi-point contact seal according to an embodiment of the present application in the brake;
[0023] Figure 4 For an embodiment of the present application Figure 3 The partial enlarged view at position A.
[0024] Explanation of the reference numerals in the drawings:
[0025] Dust cover body 100; Sealing part 101; Pleated part 102; Second annular groove body 103, Limiting part 104; First reinforcing skeleton 105; Second reinforcing skeleton 106;
[0026] Plier body 200; Cavity 201; Support part 202;
[0027] Piston 300; First annular groove body 301. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0028] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, rather than all of the embodiments, and are only used to explain the present application, not to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.
[0029] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", "bottom", "top", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "superior", "inferior", "main", "secondary", etc. are only used for descriptive purposes and can be simply used to more clearly distinguish different components, rather than indicating or implying relative importance.
[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0031] See Figures 1 to 4 As shown, schematically shown is a piston dust cover with multi-point contact sealing provided according to an embodiment of the present application, including a dust cover body 100.
[0032] Among them, the dust cover body 100 is annular, and the dust cover body 100 is used to be sleeved between the piston 300 of the brake and the cavity 201 where the piston 300 moves. Sealing between the piston 300 and the cavity 201 is achieved through the dust cover body 100. A plurality of sealing portions 101 for sealing connection with the piston 300 are provided on the inner circle of the dust cover body 100. The plurality of sealing portions 101 are arranged in sequence along the axial direction of the dust cover body 100 and are all annular. Each sealing portion 101 is coaxial with the dust cover body 100 and protrudes towards the axis direction of the dust cover body 100. The outer circle of the dust cover body 100 is used for sealing connection with the inner wall of the cavity 201.
[0033] That is to say, the dust cover body 100 is annular. A plurality of sealing portions 101 for sealing connection with the piston 300 are arranged on the inner ring of the dust cover body 100. The outer ring of the dust cover body 100 is used for sealing connection with the inner wall of the cavity 201. The plurality of sealing portions 101 are arranged in sequence along the axial direction of the dust cover body 100 and are all annular. Each sealing portion 101 is coaxial with the dust cover body 100 and protrudes towards the axis direction of the dust cover body 100. Taking Figure 1 as a reference, the plurality of sealing portions 101 make the contact surface between the inner ring of the dust cover body 100 and the piston 300 wavy, forming multiple sealing areas. When the dust cover body 100 is sleeved between the piston 300 of the brake and the cavity 201 where the piston 300 moves, the inner ring of the dust cover body 100 is sealingly connected with the piston 300 through the plurality of sealing portions 101, and the outer ring of the dust cover body 100 is sealingly connected with the inner wall of the cavity 201. The plurality of sealing portions 101 are arranged in sequence along the axial direction of the dust cover body 100 and are all annular. Each sealing portion 101 is coaxial with the dust cover body 100 and protrudes towards the axis direction of the dust cover body 100, so as to realize the sealing between the piston 300 and the cavity 201. In addition, a closed vacuum area can also be formed between two adjacent sealing portions 101 and the piston 300, and the sealing effect is better. It should be noted that there are at least two sealing portions 101, and the plurality of sealing portions 101 are in multi-point contact sealing with the piston 300. The multi-point contact sealing includes contact sealing of two points and more than two points.
[0034] Therefore, the piston dust cover with multi-point contact sealing of the present application adopts multi-point contact sealing of a plurality of sealing portions 101 with the piston 300 to form multiple sealing areas, effectively improving the sealing performance between the piston 300 and the cavity 201, having a good sealing effect, preventing sundries such as water and dust from entering the inside of the cavity 201, avoiding problems such as rusting, movement jamming and efficiency reduction, better protecting the corresponding components, and prolonging the service life of the product, etc.
[0035] In some embodiments, the dust cover body 100 is made of an elastic material, such as a sealing material like rubber. As Figure 4 shown, a first annular groove 301 matching with the inner ring of the dust cover body 100 is arranged on the outer circumferential surface of the piston 300. Each sealing portion 101 is sealingly connected with the bottom surface of the first annular groove 301. The outer ring of the dust cover body 100 and the cavity 201 can adopt an interference fit. As the piston 300 reciprocates linearly along the cavity 201, the inner ring of the dust cover body 100 moves together with the piston 300 and the outer ring of the dust cover body 100 is fixed.
[0036] When the dust cover body 100 is sleeved between the piston 300 of the brake and the cavity 201 where the piston 300 moves, the inner ring of the dust cover body 100 cooperates with the first annular groove 301 of the piston 300, and a plurality of sealing portions 101 are hermetically connected to the bottom surface of the first annular groove 301, and the outer ring of the dust cover body 100 is hermetically connected to the inner wall of the cavity 201. When the piston 300 reciprocates linearly along the cavity 201, since the dust cover body 100 can elastically deform, the inner ring of the dust cover body 100 moves together with the piston 300, and the outer ring of the dust cover body 100 is fixed. Thus, not only can the stable movement of the piston 300 be ensured, but also the sealing effect can be ensured.
[0037] Those skilled in the art can understand that the dust cover body 100 can be made of rubber or other suitable elastic materials in the prior art such as polyurethane.
[0038] In some embodiments, as Figure 1 、 4 shown, the inner rings of the dust cover body 100 are connected by a corrugated portion 102, and the corrugated portion 102 elastically deforms to move the inner ring of the dust cover body 100 and the outer ring of the dust cover body 100 is fixed.
[0039] That is to say, when the piston 300 reciprocates linearly along the cavity 201, the corrugated portion 102 elastically deforms to expand or contract to provide sufficient movement stroke, so that the inner ring of the dust cover body 100 moves together with the piston 300, and the outer ring of the dust cover body 100 is fixed. Thus, it is better to ensure that the inner ring of the dust cover body 100 moves and the outer ring of the dust cover body 100 is fixed, and the structure is more stable and reliable.
[0040] In some embodiments, as Figure 1 、 4 shown, a second annular groove 103 is provided at the connection between the inner ring of the dust cover body 100 and the corrugated portion 102, and the second annular groove 103 is coaxial with the dust cover body 100. Thus, it is convenient for the corrugated portion 102 to elastically deform to expand or contract to provide sufficient movement stroke.
[0041] In some embodiments, as Figure 1 、 4 shown, a first reinforcing skeleton 105 is provided inside the outer ring of the dust cover body 100, and the first reinforcing skeleton 105 is annular and coaxial with the dust cover body 100. Thus, not only the structural strength of the dust cover is improved, but also the outer ring of the dust cover body 100 can be prevented from moving relative to the cavity 201.
[0042] Further, the first reinforcing skeleton 105 is a metal skeleton, such as a steel skeleton. Thus, the structure is more stable, reliable, and has a longer service life. In addition, the first reinforcing skeleton 105 can also be made of a non-metallic material with high structural strength.
[0043] In some embodiments, as Figure 1 , 4 shown, a limiting portion 104 for cooperating with the cavity 201 is provided on the outer ring of the dust cover body 100, and a supporting portion 202 cooperating with the limiting portion 104 is provided on the inner wall of the cavity 201. Among them, the limiting portion 104 can be annular and coaxial with the cavity 201, the supporting portion 202 can be a protrusion, and the limiting portion 104 can form a limiting step cooperating with the supporting portion 202, etc.
[0044] When the dust cover body 100 is sleeved between the piston 300 of the brake and the cavity 201 where the piston 300 moves, the inner ring of the dust cover body 100 is hermetically connected to the piston 300 through a plurality of sealing portions 101, the outer ring of the dust cover body 100 is hermetically connected to the inner wall of the cavity 201, and the limiting portion 104 and the supporting portion 202 cooperate to perform limiting. Thus, not only can the dust cover be limited to prevent relative movement between the outer ring of the dust cover body 100 and the cavity 201, but also the sealing performance between the dust cover and the cavity 201 can be improved.
[0045] In some embodiments, as Figure 1 , 4 shown, a second reinforcing skeleton 106 cooperating with the supporting portion 202 is provided on the limiting portion 104. Among them, the second reinforcing skeleton 106 can be a metal skeleton, such as a steel skeleton, or can also be made of a non-metallic material with high structural strength. Thus, the structural strength is higher, the limiting can be better performed and the relative movement between the outer ring of the dust cover body 100 and the cavity 201 can be prevented, and the sealing performance is also better.
[0046] According to a brake provided by an embodiment of the present application, it includes the piston dust cover with multi-point contact sealing described above. Among them, the brake further includes a piston 300, a caliper body 200, a driving member (not shown), and a friction plate assembly (not shown). A cavity 201 for the piston 300 to move is provided on the caliper body 200. The piston 300 and the cavity 201 are sealed by the piston dust cover. The driving member cooperates with the piston 300, and the piston 300 cooperates with the friction plate assembly. The driving member drives the piston 300 to move along the cavity 201, so that the piston 300 drives the friction plate assembly to brake the corresponding brake disc. The piston 300, the caliper body 200, the driving member, and the friction plate assembly can adopt the corresponding mechanisms of the brakes in the prior art, which will not be elaborated here. The driving member can be a hydraulic mechanism or a lead screw mechanism, etc. The brake can be a floating caliper brake or a fixed caliper brake.
[0047] Therefore, the brake of the present application adopts the above-mentioned piston dust cover with multi-point contact sealing. The piston dust cover adopts a plurality of sealing parts 101 to be in multi-point contact sealing with the piston 300, forming a multi-layer sealing area, effectively improving the sealing performance between the piston 300 and the cavity 201, having a good sealing effect, preventing sundries such as water and dust from entering the interior of the cavity 201, avoiding problems such as rusting, movement jamming and efficiency reduction, better protecting the corresponding components, extending the service life of the product, etc. It is applicable to both floating caliper brakes and fixed caliper brakes, and has a wide application range.
[0048] Based on the above-mentioned embodiments of the present application, in the case of no clear negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.
[0049] The above are only some embodiments of the present application, which are only used to illustrate the technical solutions of the present application and are not intended to limit them. It should be understood that for those of ordinary skill in the art, without departing from the creative concept of the present application, improvements or replacements can be made according to the above description, and all such improvements and replacements should fall within the protection scope of the appended claims of the present application. In this case, all details can be replaced by equivalent elements, and the materials, shapes and dimensions can also be arbitrary.
Claims
1. A piston dust cover with multi-point contact sealing, used for a brake, characterized in that, Comprising: A dust cover body, the dust cover body being annular, the dust cover body being used for sleeving between the piston of the brake and the cavity where the piston moves, a plurality of sealing parts for sealing connection with the piston being arranged on the inner ring of the dust cover body, the plurality of sealing parts being arranged in sequence along the axial direction of the dust cover body and all being annular, each sealing part being coaxial with the dust cover body and protruding towards the axial center direction of the dust cover body, and the outer ring of the dust cover body being used for sealing connection with the inner wall of the cavity.
2. The piston dust cover with multi-point contact seal according to claim 1, characterized in that, The dust cover body is made of an elastic material, a first annular groove body matching with the inner ring of the dust cover body is arranged on the outer circumferential surface of the piston, each of the sealing parts is in sealing connection with the bottom surface of the first annular groove body, and as the piston reciprocates linearly along the cavity, the inner ring of the dust cover body moves together with the piston and the outer ring of the dust cover body is fixed.
3. The piston dust cover with multi-point contact seal according to claim 2, characterized in that, The inner ring of the dust cover body is connected with its inner ring through a corrugated part, and the corrugated part elastically deforms to enable the inner ring of the dust cover body to move and the outer ring of the dust cover body to be fixed.
4. The piston dust cover with multi-point contact sealing according to claim 3, characterized in that, A second annular groove body is arranged at the connection position between the inner ring of the dust cover body and the corrugated part, and the second annular groove body is coaxial with the dust cover body.
5. The piston dust cover with multi-point contact seal according to claim 2, characterized in that, A first strengthening skeleton is arranged inside the outer ring of the dust cover body, the first strengthening skeleton being annular and coaxial with the dust cover body.
6. The piston dust cover with multi-point contact sealing according to claim 5, characterized in that, The first strengthening skeleton is a metal skeleton.
7. The piston dust cover with multi-point contact sealing according to claim 2, characterized in that, A limiting part for matching with the cavity is arranged on the outer ring of the dust cover body, and a supporting part matching with the limiting part is arranged on the inner wall of the cavity.
8. The piston dust cover with multi-point contact sealing according to claim 7, characterized in that, The limiting part is annular and coaxial with the cavity.
9. The piston dust cover with multi-point contact sealing according to claim 8, characterized in that, A second strengthening skeleton matching with the supporting part is arranged on the limiting part.
10. A brake, characterized in that, Including the piston dust cover with multi-point contact sealing according to any one of claims 1 to 9 above.