Wear-resistant structure of piston

Abstract

The utility model discloses a wear-resistant structure of a piston, the wear-resistant structure is arranged on a piston body, the wear-resistant structure comprises a wear-resistant part, the piston body is sleeved with the wear-resistant part, the outer side wall of the piston body is provided with a fixing groove, the wear-resistant part is provided with a fixing part matched with the fixing groove, the fixing part is embedded into the fixing groove, and the wear-resistant part is made of wear-resistant materials; according to the wear-resistant piston, firstly, the wear-resistant part sleeving mode is adopted, the wear-resistant effect of the piston body is improved, the service life is prolonged, secondly, through cooperation between the fixing part and the fixing groove, the falling-off prevention effect is achieved, and in the axial linear motion process of the piston, the wear-resistant part is not prone to falling off.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic motor technical field, concretely relates to a piston's wear -resisting structure. BACKGROUND

[0002] Pneumatic motor drives piston to carry out linear motion through compressed air, and the linear motion is converted into rotary motion through connecting rod and crankshaft. The piston moves axially and linearly relative to the cylinder. The piston is prone to wear during operation. Therefore, the utility model wants to solve the technical problem of the piston wear. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model wants to solve the technical problem of the piston wear.

[0004] Therefore, a piston's wear -resisting structure, wear -resisting structure installs in the piston body, and the wear -resisting structure includes:

[0005] The wear -resisting piece is sleeved on the piston body, the outer edge wall of the piston body is provided with a fixed groove, the wear -resisting piece is provided with a fixed part matched with the fixed groove, the fixed part is embedded into the fixed groove, and the wear -resisting piece is made of wear -resisting material.

[0006] The fixed groove is a dovetail groove, or the fixed groove is provided with a barb structure, or the fixed groove is provided with a stepped hole.

[0007] The fixed groove is annularly arranged and is distributed at equal intervals on the outer edge wall of the piston body, and the number of the fixed grooves is at least two.

[0008] The fixed groove is a single-head spiral, or the fixed groove is a multi-head spiral.

[0009] The piston body includes a piston part and a mounting part, a mounting groove is arranged between the piston part and the mounting part, and the mounting groove is used to mount a piston ring, and the wear -resisting piece is sleeved on the piston part.

[0010] The upper end of the wear -resisting piece does not exceed the top surface of the piston part, and the lower end of the wear -resisting piece does not exceed the upper end of the mounting groove.

[0011] The piston body is provided with a first through hole, the first through hole penetrates the outer edge wall of the piston body, the wear -resisting piece is provided with a second through hole, and the second through hole and the first through hole are coaxially arranged.

[0012] The wear -resisting piece is integrally injection molded.

[0013] The utility model technical scheme has the following advantages:

[0014] 1. The utility model provides a kind of wear-resistant structure of piston, first adopt the mode of wear-resistant piece cover, improve the wear resistance of piston body, improve service life, second, the cooperation between fixed part and fixed groove, prevent the effect of falling off, so that piston is in axial linear motion process, wear-resistant piece is not prone to falling off.

[0015] 2. The utility model provides a kind of wear-resistant structure of piston, the structure of different fixed groove is realized the anti-falling effect of wear-resistant piece.

[0016] 3. The utility model provides a kind of wear-resistant structure of piston, the cooperation between multiple annular grooves improves the anti-falling effect of wear-resistant piece.

[0017] 4. The utility model provides a kind of wear-resistant structure of piston, the setting of wear-resistant piece increases the wear resistance of piston, forms the friction between wear-resistant piece and cylinder body, and the contact between piston part, mounting part and cylinder body is not caused.This place the size of piston part is greater than the size of mounting part, in actual action process, the outer edge wall of mounting part is not contacted with cylinder body.

[0018] 5. The utility model provides a kind of wear-resistant structure of piston, first through hole, second through hole cooperation forms the fixation of shaft pin.This place shaft pin is used to be connected with crankshaft.

[0019] 6. The utility model provides a kind of wear-resistant structure of piston, integral injection molding specifically refers to, first piston body is placed into mould, then carries out injection, so that wear-resistant piece is formed on the surface of piston part. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0021] Figure 1 It is a kind of wear-resistant structure of piston provided by the utility model for the structure schematic view of the wear-resistant structure of piston;

[0022] Figure 2 It is a kind of wear-resistant structure of piston provided by the utility model for the sectional view of the wear-resistant structure of piston;

[0023] Figure 3 It is another angle sectional view of a kind of wear-resistant structure of piston provided by the utility model;

[0024] Figure 4 It is another form sectional view of a kind of wear-resistant structure of piston provided by the utility model.

[0025] Figure 5 Another form of structure schematic view of the wear-resistant structure of the piston provided by the utility model;

[0026] Figure 6 Another form of structure schematic view of the wear-resistant structure of the piston provided by the utility model.

[0027] Explanation of reference signs:

[0028] 11, piston body; 12, wear-resistant part; 111, fixing groove; 112, piston part; 113, mounting part; 114, mounting groove; 115, first through hole; 121, fixing part; 122, second through hole. DETAILED DESCRIPTION

[0029] The technical solutions of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0030] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the drawings shown, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0033] Embodiment 1

[0034] The embodiment provides a wear-resistant structure of a piston, as shown in the accompanying Figures 1-4 The wear-resistant structure is mounted on the piston body 11, and the wear-resistant structure comprises:

[0035] The wear-resistant part 12 is sleeved on the piston body 11, the outer edge wall of the piston body 11 is provided with a fixing groove 111, the wear-resistant part 12 is provided with a fixing part 121 matched with the fixing groove 111, the fixing part 121 is embedded into the fixing groove 111, the wear-resistant part 12 is made of wear-resistant material, and it is to be explained that the material of the wear-resistant part 12 is different from that of the piston body 11. Firstly, the wear-resistant part 12 is sleeved to improve the wear-resistant effect of the piston body 11 and prolong the service life, and secondly, the cooperation between the fixing part 121 and the fixing groove 111 prevents the wear-resistant part 12 from falling off during the linear motion of the piston in the axial direction.

[0036] Specifically, as shown in the accompanying Figures 2-4 The fixing groove 111 is a dovetail groove, and the dovetail groove is that the bottom surface size of the fixing groove 111 is greater than the top surface size of the fixing groove 111, so that the effect of being large at the bottom and small at the top is formed. Alternatively, the fixing groove 111 is provided with a barb structure, and the barb structure is formed in the axial direction to lock the wear-resistant part 12 and the piston body 11. Alternatively, the fixing groove 111 is provided with a stepped hole, the stepped hole forms a locking of different depths, and the wear-resistant part 12 and the piston body 11 are cooperatively fixed. It should be noted that when the fixing groove 111 is provided with the stepped hole, the fixing part 121 is also provided with a stepped protrusion matched with the stepped hole. Through the structure of the different fixing grooves 111, the anti-falling effect of the wear-resistant part 12 is realized. In addition, the fixing of the wear-resistant part 12 and the piston body 11 can also be realized by means of bolts or adhesion.

[0037] Specifically, the fixing groove 111 is annularly arranged and is distributed at equal intervals on the outer edge wall of the piston body 11, and it should be noted that the imaginary central axis of the fixing groove 111 is coaxially arranged with the imaginary central axis of the piston body 11, that is, the fixing groove 111 is a circular ring structure. The number of the fixing grooves 111 is at least two. Through the cooperation between the plurality of annular grooves, the anti-falling effect of the wear-resistant part 12 is improved. The number of the fixing grooves 111 can be adjusted according to actual requirements.

[0038] Specifically, as shown in the accompanying Figures 5-6 The fixing groove 111 is a single-head spiral, and the single-head spiral specifically refers to that the center line of the fixing groove 111 is a spiral line, forming a spiral structure. Alternatively, the fixing groove 111 is a multi-head spiral, and the multi-head spiral refers to that a plurality of spiral lines are cooperatively composed, which can be two, or three, or more, and can be adjusted according to actual requirements.

[0039] Specifically, as shown in the accompanying Figures 1-4As shown, the piston body 11 comprises a piston part 112 and a mounting part 113, and a mounting groove 114 is arranged between the piston part 112 and the mounting part 113, in the embodiment, the piston part 112 is located at the uppermost position, and the mounting part 113 is located below, and the fixing groove 111 is arranged on the outer edge wall of the piston part 112. The mounting groove 114 is used to mount the piston ring; the wear-resistant part 12 is sleeved on the piston part 112. The arrangement of the wear-resistant part 12 increases the wear resistance of the piston, forms the friction between the wear-resistant part 12 and the cylinder body, and does not cause the contact between the piston part 112, the mounting part 113 and the cylinder body. Here, the size of the piston part 112 is greater than the size of the mounting part 113, and in the actual operation process, the outer edge wall of the mounting part 113 does not contact the cylinder body.

[0040] Specifically, the upper end of the wear-resistant part 12 does not exceed the top surface of the piston part 112; the lower end of the wear-resistant part 12 does not exceed the upper end of the mounting groove 114. In the embodiment, preferably, the upper end of the wear-resistant part 12 is coplanar with the top surface of the piston part 112, and the lower end of the wear-resistant part 12 is coplanar with the upper end of the mounting groove 114, that is, the wear-resistant part 12 is formed to fit the outer surface of the piston part 112.

[0041] Specifically, as shown in the accompanying drawings, Figures 1-4 As shown, the piston body 11 is provided with a first through hole 115 penetrating the outer edge wall of the piston body 11; the wear-resistant part 12 is provided with a second through hole 122 coaxially arranged with the first through hole 115. The first through hole 115 and the second through hole 122 cooperate to form the fixing of the shaft pin. Here, the shaft pin is used to connect with the crankshaft. Here, the size of the first through hole 115 and the size of the second through hole 122 can be equal, or can be adjusted according to actual needs.

[0042] Specifically, the wear-resistant part 12 is integrally injection molded. Integrally injection molding specifically refers to placing the piston body 11 into a mold first, and then injecting glue to form the wear-resistant part 12 on the surface of the piston part 112. In the embodiment, the material of the wear-resistant part 12 is engineering plastic.

[0043] Obviously, the above embodiments are only examples for clear illustration, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A wear-resistant structure for a piston, wherein the wear-resistant structure is installed on the piston body (11), characterized in that, The wear-resistant structure includes: Wear-resistant component (12) is sleeved on piston body (11). The outer side wall of piston body (11) is provided with fixing groove (111). Wear-resistant component (12) is provided with fixing part (121) that cooperates with fixing groove (111). Fixing part (121) is embedded into fixing groove (111). Wear-resistant component (12) is made of wear-resistant material.

2. The wear-resistant structure of the piston according to claim 1, characterized in that, The fixing groove (111) is a dovetail groove; or, the fixing groove (111) is provided with a barb structure; or, the fixing groove (111) is provided with a stepped hole.

3. The wear-resistant structure of the piston according to claim 1, characterized in that, The fixing grooves (111) are arranged in a ring and are distributed at equal intervals on the outer wall of the piston body (11). The number of fixing grooves (111) is at least two.

4. The wear-resistant structure of the piston according to claim 1, characterized in that, The fixing groove (111) is a single-headed spiral; or the fixing groove (111) is a multi-headed spiral.

5. The wear-resistant structure of the piston according to claim 1, characterized in that, The piston body (11) includes a piston part (112) and a mounting part (113). A mounting groove (114) is provided between the piston part (112) and the mounting part (113) for mounting piston rings. The wear-resistant part (12) is sleeved on the piston part (112).

6. The wear-resistant structure of the piston according to claim 5, characterized in that, The upper end of the wear-resistant part (12) does not extend beyond the top surface of the piston part (112); the lower end of the wear-resistant part (12) does not extend beyond the upper end of the mounting groove (114).

7. The wear-resistant structure of the piston according to claim 1, characterized in that, The piston body (11) is provided with a first through hole (115), which penetrates the outer wall of the piston body (11); the wear-resistant part (12) is provided with a second through hole (122), which is coaxial with the first through hole (115).

8. The wear-resistant structure of the piston according to claim 1, characterized in that, The wear-resistant part (12) is integrally injection molded.

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