Automobile piston

Abstract

The utility model belongs to the technical field of pistons, and particularly relates to an automobile piston which comprises an outer shell, an inner shell and a piston rod. The inner floating shell is arranged in the mounting hole, and a piston cavity is formed in the inner floating shell; the end limiting ring is arranged on a port of the mounting hole and limits the inner floating shell to slide out of the mounting hole; the plurality of inner buffer plates are uniformly distributed on the inner buffer plates along the circumference, and the inner sides and the outer sides of the inner buffer plates are respectively contacted with the inner wall of the mounting hole and the inner floating shell; and the buffer cushion is arranged between the bottom of the mounting hole and the inner floating shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of pistons, in particular to an automobile piston. Background Art

[0002] At present, automobile braking is basically hydraulic braking, which achieves braking by hydraulically driving the brake pads on the brake caliper to hold the brake disc. Driven by the piston, the brake pads gradually approach the brake disc. At the moment of contact, the brake pads and the brake disc are rigidly combined to complete the braking work. However, during the braking process, the screw and the threaded sleeve in the piston will shake in the piston, thus affecting the overall service life of the piston. Utility Model Content

[0003] The purpose of the utility model is to provide an automobile piston with a simple structure and good floating buffering effect in view of the above-mentioned existing technical problems.

[0004] In view of this, the utility model provides an automobile piston, comprising:

[0005] An outer shell, one end of which is inwardly formed with a mounting hole;

[0006] An inner floating shell, which is arranged in the mounting hole and has a piston cavity;

[0007] An end stop ring, which is arranged on the port of the mounting hole and limits the inner floating shell to slide out of the mounting hole;

[0008] An inner buffer sheet, wherein a plurality of inner buffer sheets are evenly distributed on the inner buffer sheet according to the circumference and inner and outer sides of the inner buffer sheet are respectively in contact with the inner wall of the mounting hole and the inner floating shell;

[0009] A buffer pad is arranged between the bottom of the mounting hole and the inner floating shell.

[0010] In the above technical solution, further, it also includes:

[0011] The inner supporting layer is arranged on the outer wall of the inner floating shell.

[0012] In the above technical solution, further, it also includes:

[0013] A receiving groove, wherein a plurality of receiving grooves are evenly distributed on the inner wall of the mounting hole according to the circumference;

[0014] Each receiving groove is provided with an inner buffer sheet.

[0015] In the above technical solution, further, it also includes:

[0016] A receiving block, wherein a plurality of receiving blocks are evenly distributed on the outer wall of the inner floating shell according to the circumference;

[0017] The number of receiving blocks is equal to the number of receiving grooves, and the receiving blocks are inserted into the receiving grooves and matched with the receiving groove gaps, and the two sides of the inner buffer sheet are respectively against the receiving grooves and the receiving blocks.

[0018] In the above technical solution, further, the cross-section of the receiving groove is arc-shaped, the receiving block is arc-shaped and concave supporting grooves are formed on both sides of the receiving block; the two ends of the inner buffer plate are against the supporting groove, and the middle part is located between the receiving groove and the receiving block.

[0019] In the above technical solution, further, the inner buffer sheet includes:

[0020] External connecting parts, the two external connecting parts are symmetrically arranged and located in the supporting groove;

[0021] An arc-shaped support portion, the arc-shaped support portion connects the two outer receiving portions and is located between the receiving groove and the receiving block;

[0022] A floating gap is formed between the wall surface of the arc-shaped support portion and the side wall of the receiving block, and two sides of the arc-shaped support portion are in contact with two sides of the receiving block.

[0023] In the above technical solution, further, the inner receiving layer includes:

[0024] A buffer layer is formed on the outer wall of the inner floating shell by spraying.

[0025] The beneficial effects of the utility model are:

[0026] 1. The setting of the inner buffer sheet can ensure the floating shock absorption effect between the inner floating shell and the outer shell;

[0027] 2. The cooperation between the receiving block and the receiving groove can ensure that there is no rotational offset between the inner floating shell and the outer shell, and can better transfer torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a longitudinal cross-sectional schematic diagram of the utility model;

[0030] Figure 3 It is a schematic diagram of a transverse section of the utility model;

[0031] Figure 4 It is a partial enlarged view of the transverse cross section of the utility model;

[0032] The markings in the figure are: 1-outer shell, 2-inner floating shell, 3-piston chamber, 4-end limit ring, 5-inner buffer plate, 5a-outer receiving part, 5b-arc-shaped supporting part, 6-inner receiving layer, 7-receiving groove, 8-receiving block, 9-supporting groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0034] Embodiment 1:

[0035] This embodiment provides an automobile piston, comprising:

[0036] An outer shell 1, one end of the outer shell 1 is formed with a mounting hole inwardly;

[0037] An inner floating shell 2, which is arranged in the mounting hole and has a piston chamber 3;

[0038] An end stop ring 4 is arranged on the end of the mounting hole and limits the inner floating shell 2 to slide out of the mounting hole;

[0039] An inner buffer sheet 5, wherein a plurality of inner buffer sheets 5 are evenly distributed on the inner buffer sheet 5 according to the circumference, and inner and outer sides of the inner buffer sheet 5 are respectively in contact with the inner wall of the mounting hole and the inner floating shell 2;

[0040] The buffer pad is arranged between the bottom of the mounting hole and the inner floating shell 2.

[0041] In this embodiment, the piston cavity 3 is formed on the inner floating shell 2. When the piston is damaged, only the corresponding outer shell 1 or the inner floating shell 2 needs to be replaced, thereby reducing the cost of piston maintenance; the setting of the end limit ring 4 ensures the stability of the structure of the inner floating ring fixed in the outer shell 1, and the setting of the inner buffer plate 5 can ensure the floating shock-absorbing effect between the inner floating shell 2 and the outer shell 1, thereby integrating the jitter between the inner screw and the threaded sleeve of the piston and the piston, thereby increasing the overall service life of the brake caliper; and the setting of the buffer pad can play an axial buffering and vibration reduction effect between the outer shell 1 and the inner floating shell 2.

[0042] Embodiment 2:

[0043] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] Also includes:

[0045] The inner receiving layer 6 is arranged on the outer wall of the inner floating shell 2 .

[0046] In this embodiment, the provision of the inner receiving layer 6 can improve the stability of the structure of the inner floating shell 2 , thereby ensuring the overall service life of the inner floating shell 2 .

[0047] Embodiment 3:

[0048] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0049] Also includes:

[0050] A receiving groove 7, wherein a plurality of receiving grooves 7 are evenly distributed on the inner wall of the mounting hole according to the circumference;

[0051] Each receiving groove 7 is provided with an inner buffer sheet 5 .

[0052] In this embodiment, the receiving groove 7 is provided to facilitate the placement of the inner buffer plate 5, thereby ensuring the stability of the overall structure of the piston, and the inner buffer plate 5 can be made of elastic metal.

[0053] Embodiment 4:

[0054] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] Also includes:

[0056] A receiving block 8, wherein a plurality of receiving blocks 8 are evenly distributed on the outer wall of the inner floating shell 2 according to the circumference;

[0057] The number of the receiving blocks 8 is equal to the number of the receiving grooves 7 , and the receiving blocks 8 are inserted into the receiving grooves 7 and are gap-matched with the receiving grooves 7 , and the two sides of the inner buffer sheet 5 are respectively against the receiving grooves 7 and the receiving blocks 8 .

[0058] In this embodiment, the cooperation between the receiving block 8 and the receiving groove 7 can ensure that no rotational offset occurs between the inner floating shell 2 and the outer shell 1, and can better transfer torque, thereby ensuring the practicality of the piston; and the receiving block is inserted into the receiving groove 7 and cooperates with the receiving groove 7 with a clearance, so that the outer floating shell can slightly float radially relative to the outer shell 1; thereby ensuring the overall service life of the piston.

[0059] Embodiment 5:

[0060] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0061] The receiving groove 7 has an arc-shaped cross section, the receiving block 8 is arc-shaped and concave supporting grooves 9 are formed on both sides of the receiving block 8; both ends of the inner buffer sheet 5 are against the supporting grooves 9, and the middle part is located between the receiving groove 7 and the receiving block 8.

[0062] In this embodiment, the setting of the support groove 9 can have a good fixing effect on the inner buffer sheet 5, thereby preventing the inner buffer sheet 5 from being displaced, and the middle part of the inner buffer sheet 5 is located between the receiving groove 7 and the receiving block 8, thereby ensuring a good buffering and floating effect between the outer shell 1 and the inner floating shell 2.

[0063] Embodiment 6:

[0064] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] The inner buffer sheet 5 comprises:

[0066] The two outer receiving parts 5a are symmetrically arranged and located in the supporting groove 9;

[0067] An arc-shaped support portion 5b, the arc-shaped support portion 5b connects the two outer receiving portions 5a and is located between the receiving groove 7 and the receiving block 8;

[0068] A floating gap is formed between the wall surface of the arc-shaped support portion 5 b and the side wall of the receiving block 8 , and two sides of the arc-shaped support portion 5 b are in contact with two sides of the receiving block 8 .

[0069] In this embodiment, the outer receiving portion 5a cooperates with the supporting groove 9 to provide a good supporting effect on the inner buffer plate 5, and the arc-shaped supporting plate is formed between the receiving groove 7 and the receiving block 8, and a floating gap is formed between the wall surface of the arc-shaped supporting portion 5b and the side wall of the receiving block 8, thereby ensuring that the receiving block 8 can achieve a good radial floating effect; thereby improving the overall service life of the piston.

[0070] Embodiment 7:

[0071] This embodiment provides an automobile piston, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0072] The inner supporting layer 6 comprises:

[0073] The buffer layer is formed on the outer wall of the inner floating shell 2 by spraying.

[0074] In this embodiment, the buffer layer is an elastic spray layer formed by spraying a silicon dioxide sol and an aluminum oxide sol bonding slurry containing ceramic particles on the inner floating outer wall, thereby ensuring that the buffer layer has a good elastic buffering effect.

[0075] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An automobile piston, characterized in that: include: An outer shell (1), wherein one end of the outer shell (1) is formed with a mounting hole inwardly; An inner floating shell (2), wherein the inner floating shell (2) is arranged in the mounting hole, and a piston chamber (3) is provided on the inner floating shell (2); An end limiting ring (4), wherein the end limiting ring (4) is arranged on the end of the mounting hole and limits the inner floating shell (2) to slide out of the mounting hole; An inner buffer sheet (5), wherein a plurality of the inner buffer sheets (5) are evenly distributed on the inner buffer sheet (5) along a circumference and two sides of the inner buffer sheet (5) are in contact with the inner wall of the mounting hole and the inner floating shell (2) respectively.

2. An automobile piston according to claim 1, characterized in that: Also includes: An inner supporting layer (6), wherein the inner supporting layer (6) is arranged on the outer wall of the inner floating shell (2).

3. The automobile piston according to claim 1, characterized in that: Also includes: A receiving groove (7), wherein a plurality of the receiving grooves (7) are evenly distributed on the inner wall of the mounting hole along a circumference; Each of the receiving grooves (7) is provided with an inner buffer sheet (5).

4. The automobile piston according to claim 3, characterized in that: Also includes: A receiving block (8), wherein a plurality of the receiving blocks (8) are evenly distributed on the outer wall of the inner floating shell (2) along a circumference; The number of the receiving blocks (8) is equal to the number of the receiving grooves (7), and the receiving blocks (8) are inserted into the receiving grooves (7) and are clearance-matched with the receiving grooves (7), and the two sides of the inner buffer sheet (5) are respectively against the receiving grooves (7) and the receiving blocks (8).

5. The automobile piston according to claim 4, characterized in that: Also includes: The cross section of the receiving groove (7) is arc-shaped, the receiving block (8) is arc-shaped and concave supporting grooves (9) are formed on both sides of the receiving block (8); the two ends of the inner buffer sheet (5) are against the supporting grooves (9), and the middle part is located between the receiving groove (7) and the receiving block (8).

6. The automobile piston according to claim 5, characterized in that: Also includes: The inner buffer sheet (5) comprises: An outer receiving portion (5a), wherein the two outer receiving portions (5a) are symmetrically arranged with respect to each other and are located in the supporting groove (9); An arc-shaped support portion (5b), wherein the arc-shaped support portion (5b) connects the two outer receiving portions (5a) and the arc-shaped support portion (5b) is located between the receiving groove (7) and the receiving block (8); A floating gap is formed between the arc-shaped supporting portion (5b) and the side wall of the receiving block (8).

7. The automobile piston according to claim 2, characterized in that: The inner receiving layer (6) comprises: A buffer layer is formed by spraying on the outer wall of the inner floating shell (2).

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