CN104088716B - A kind of piston of automobile - Google Patents

Abstract

The present invention relates to an automobile part, in particular to an automobile piston, comprising a piston body. The top of the piston body is the piston top, the bottom is the piston skirt, the middle part is the piston pin seat, and the outer ring surface of the piston top is provided with There are several annular grooves, piston rings are arranged in the annular grooves, a piston pin is arranged in the piston pin seat, a positioning hole is provided on the lower surface of the piston pin, and a positioning hole is provided on the piston pin seat. Corresponding position of the piston pin hole, the piston pin hole is provided with a positioning assembly, the positioning assembly includes a positioning rod and a spring, one end of the spring is fixed to one end of the positioning rod, and the other end is connected to the positioning rod. The bottom of the piston pin clamping hole is fixed, and the positioning rod is inserted in the positioning hole on the piston pin. The beneficial effect of the present invention is: the piston realizes the positioning and fixing of the piston pin and the piston pin seat through the positioning assembly on the piston seat and the positioning hole on the piston pin, and avoids relative sliding of the piston pin during use.

Description

a car piston

technical field

The invention relates to an automobile part, in particular to an automobile piston.

Background technique

The piston is the central part of the car engine and plays an extremely important role in the operation of the entire engine. The piston is connected with the connecting rod during use, and cooperates with the connecting rod to realize the piston movement of the piston and provide power. The connection between the piston and the connecting rod is realized by the piston pin passing through the small end bushing hole of the connecting rod. During the movement of the piston, the piston pin and the small end bushing hole of the connecting rod may slide relative to each other, and the piston The pin may move to both sides of the piston pin seat, and one end of the piston pin even protrudes from the piston pin seat, rubbing against the inner wall of the cylinder when the piston moves, and damaging the cylinder.

Contents of the invention

The technical problem to be solved by the present invention is to provide an automobile piston, so that the piston pin and the piston pin seat can be fixed and positioned better, so as to avoid the relative sliding between the piston pin and the piston pin seat, thereby affecting the performance of the piston.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an automobile piston, comprising a piston body, the top of the piston body is the piston top, the bottom is the piston skirt, the middle part is the piston pin seat, and the outer ring surface of the piston top is There are several annular grooves on the top, piston rings are arranged in the annular grooves, a piston pin is arranged in the piston pin seat, a positioning hole is provided on the lower surface of the piston pin, and a piston pin is provided on the piston pin seat. There is a piston pin holding hole corresponding to the position of the positioning hole, and a positioning assembly is arranged in the piston pin holding hole, the positioning assembly includes a positioning rod and a spring, and one end of the spring is fixed to one end of the positioning rod , the other end is fixed to the bottom of the piston pin hole, and the positioning rod is inserted into the positioning hole on the piston pin.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the piston pin is provided with two or more than two positioning holes, and the piston pin seat is provided with the same number of piston pin locking holes as the positioning holes.

Further, the piston ring is a circular ring with discontinuities, a groove is provided on one end of the piston ring, and a protrusion matching the groove is provided on the other end.

Further, the groove is a U-shaped groove.

Further, the width of the U-shaped groove is one-third of the thickness of the piston ring, and the thickness of the protrusion is one-third of the thickness of the piston ring.

The beneficial effect of the invention is: the piston realizes the positioning and fixing of the piston pin and the piston pin seat through the positioning assembly on the piston seat and the positioning hole on the piston pin, and avoids relative sliding of the piston pin during use. The setting of two or more positioning holes and matching positioning components makes the positioning effect better. The two ends of the piston ring are respectively provided with U-shaped grooves and protrusions matching the grooves, which avoids the existence of an open gap channel on the piston ring after the piston ring is arranged in the piston groove, and the width of the U-shaped groove The setting that the thickness of the protrusion is one-third of the thickness of the piston ring is one-third of the thickness of the ring can ensure the strength of both ends of the piston ring.

Description of drawings

Fig. 1 is the structural representation of a kind of automobile piston of the present invention, and piston top is not sectioned among the accompanying drawings, and other parts are sectional views;

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Piston body, 2. Piston top, 3. Piston skirt, 4. Piston pin seat, 5. Annular groove, 6. Piston ring, 7. Piston pin, 8. Piston pin clamping hole, 9. Positioning hole, 10 , positioning rod, 11, spring, 12, groove, 13, bump.

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figure 1, the present invention includes a piston body 1, the top of the piston body 1 is the piston top 2, the bottom is the piston skirt 3, the middle part is the piston pin seat 4, and the outer ring surface of the piston top 2 is provided with There are several annular grooves 5, piston rings 6 are arranged in the annular grooves 5, a piston pin 7 is arranged in the piston pin seat 4, and a positioning hole 9 is arranged on the lower surface of the piston pin 7. The piston pin seat 4 is provided with a piston pin holding hole 8 corresponding to the position of the positioning hole 9, and a positioning assembly is arranged in the piston pin holding hole 8, and the positioning assembly includes a positioning rod 10 and a spring 11. One end of the spring 11 is fixed to one end of the positioning rod 10 , and the other end is fixed to the bottom of the piston pin hole 8 , and the positioning rod 10 is inserted into the positioning hole 9 on the piston pin 7 .

A preferred technical solution is: the piston pin 7 is provided with two or more than two positioning holes 9 , and the piston pin seat 4 is provided with the same number of piston pin locking holes 8 as the positioning holes 9 . The piston ring 6 is a discontinuous circular ring. A groove 12 is provided on one end of the piston ring 6 , and a protrusion 13 matching the groove 12 is provided on the other end. The groove 12 is a U-shaped groove 12, the width of the U-shaped groove 12 is one-third of the thickness of the piston ring 6, and the thickness of the protrusion 13 is three-thirds of the thickness of the piston ring 6. one-third.

The piston passes through the positioning assembly on the piston seat and the positioning hole 9 on the piston pin 7 to realize the positioning and fixing of the piston pin 7 and the piston pin seat 4, so as to avoid relative sliding of the piston pin 7 during use. The setting of two or more positioning holes 9 and matching positioning components makes the positioning effect better. The two ends of the piston ring 6 are respectively provided with a U-shaped groove 12 and a protrusion 13 matched with the groove 12, which avoids the existence of an open gap channel on the piston ring 6 after the piston ring 6 is arranged in the piston groove. The width of the U-shaped groove 12 is one-third of the thickness of the piston ring 6 , and the setting of the thickness of the protrusion 13 is one-third of the thickness of the piston ring 6 can ensure the strength of both ends of the piston ring 6 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (5)

1. a kind of automobile piston, comprises piston body (1), and the top of described piston body (1) is piston top (2), and the bottom is piston skirt (3), and middle part is piston pin seat (4), and described Several annular grooves (5) are arranged on the outer ring surface of the piston top (2), and piston rings (6) are arranged in the annular grooves (5), and a piston pin is arranged in the piston pin seat (4). (7), the lower surface of the piston pin (7) is provided with a positioning hole (9), and the piston pin seat (4) is provided with a piston pin clamping hole corresponding to the position of the positioning hole (9) (8), characterized in that a positioning assembly is provided in the piston pin hole (8), and the positioning assembly includes a positioning rod (10) and a spring (11), and one end of the spring (11) is connected to the One end of the positioning rod (10) is fixed, and the other end is fixed to the bottom of the piston pin hole (8), and the positioning rod (10) is inserted in the positioning hole (9) on the piston pin (7). 2. A kind of automobile piston according to claim 1, characterized in that, the piston pin (7) is provided with two or more than two positioning holes (9), and the piston pin seat (4) There are piston pin clamping holes (8) with the same number as the positioning holes (9). 3. A kind of automobile piston according to claim 1 or 2, is characterized in that, described piston ring (6) is the annular ring that has discontinuity, and one end of described piston ring (6) is provided with groove ( 12), the other end is provided with a protrusion (13) matching the groove (12). 4. A kind of automobile piston according to claim 3, characterized in that, the groove (12) is a U-shaped groove. 5. A kind of automobile piston according to claim 4, characterized in that, the width of the U-shaped groove is 1/3rd of the thickness of the piston ring (6), and the thickness of the projection (13) It is one-third of the thickness of the piston ring (6).