CN-224214260-U - Hydraulic drive type variable compression ratio piston connecting rod assembly

CN224214260UCN 224214260 UCN224214260 UCN 224214260UCN-224214260-U

Abstract

The utility model relates to the technical field of engine components for vehicles and discloses a hydraulic drive type piston connecting rod component with a variable compression ratio, which comprises a piston upper body and a piston lower body, wherein the piston upper body and the piston lower body are mutually clamped, a cylindrical cavity in the middle of the piston upper body and the piston lower body is used as a main oil cavity, a connecting rod is arranged at the bottom end of the piston lower body, an elastic component is connected between the piston upper body and the piston lower body, the elastic component comprises a first fixed ring, a second fixed ring and a first spring, a connecting frame and a second connecting frame are respectively arranged at the top end of the first fixed ring and the bottom end of the second fixed ring, and the first spring is arranged between the first connecting frame and the second connecting frame.

Inventors

SHI YUBAO
CAO BINGXIN
LU HONGKUN
ZHU ZHICHENG

Assignees

九江职院产教融合发展有限公司

Dates

Publication Date: 20260508
Application Date: 20250711

Claims (6)

1. The hydraulic drive type variable compression ratio piston connecting rod assembly comprises a piston upper body (1) and a piston lower body (2), wherein the piston upper body (1) and the piston lower body (2) are clamped with each other, a cylindrical cavity in the middle of the piston upper body (1) and the piston lower body (2) is a main oil cavity (20), a connecting rod (3) is arranged at the bottom end of the piston lower body (2), the hydraulic drive type variable compression ratio piston connecting rod assembly is characterized in that an elastic assembly is connected between the piston upper body (1) and the piston lower body (2), the elastic assembly comprises a first fixed ring (4), a second fixed ring (5) and a first spring (10), a first connecting frame (16) and a second connecting frame (17) are respectively arranged at the top end of the first fixed ring (4) and the bottom end of the second fixed ring (5), a first positioning column (6) and a second positioning column (7) are respectively arranged between the first connecting frame (16) and the second connecting frame (17), a first positioning hole (8) and a second positioning hole (9) are respectively formed in the first fixed ring (4) and the second fixed ring (5) respectively, the clamping frame is characterized in that the top end of the first fixing ring (4) and the bottom end of the second fixing ring (5) are both connected with the clamping frame (11) in a sliding mode, clamping grooves (12) are formed in the outer walls of the first positioning column (6) and the second positioning column (7), and the clamping frame (11) is clamped in the clamping grooves (12).
2. The hydraulic driving type piston connecting rod assembly with variable compression ratio according to claim 1, wherein the number of the first positioning column (6), the second positioning column (7), the first positioning hole (8) and the second positioning hole (9) is four, and the first positioning column (6) and the second positioning column (7) are respectively matched with the first positioning hole (8) and the second positioning hole (9).
3. A hydraulically driven variable compression ratio piston rod assembly according to claim 1, characterized in that the clamping frame (11) is adapted to the clamping groove (12).
4. The hydraulic driving type variable compression ratio piston connecting rod assembly according to claim 1, wherein a limit sliding block (13) is installed on the outer wall of the clamping frame (11), limit sliding grooves (14) are formed in the outer walls of the first fixing ring (4) and the second fixing ring (5), the limit sliding block (13) is slidably connected with the limit sliding groove (14), a limit rod (21) is installed on the inner wall of the limit sliding groove (14), the limit rod (21) movably penetrates through the limit sliding block (13), a second spring (15) is arranged on the outer wall of the limit rod (21) in a surrounding mode, and the second spring (15) is installed between one side of the limit sliding block (13) and the inner wall of the limit sliding groove (14).
5. The hydraulic driving type variable compression ratio piston connecting rod assembly according to claim 1, wherein a hanging rope (18) is arranged on the outer wall of the clamping frame (11), and hanging rods (19) are arranged on the outer walls of the first fixed ring (4) and the second fixed ring (5).
6. A hydraulically driven variable compression ratio piston rod assembly according to claim 5, characterized in that the material of the suspension string (18) is an elastic material.

Description

Hydraulic drive type variable compression ratio piston connecting rod assembly Technical Field The utility model belongs to the technical field of engine assemblies for vehicles, and particularly relates to a hydraulic drive type variable compression ratio piston connecting rod assembly. Background The compression ratio of an automobile refers to the degree to which the engine mixture is compressed, expressed as the ratio of the total cylinder volume before compression to the cylinder volume after compression (i.e., the combustion chamber volume). The compression ratio has a great relation with the engine performance, and the typical low-pressure compression ratio means that the compression ratio is 10 or less, the high compression ratio is 10 or more, and the higher the compression ratio is, the greater the power of the engine is. Generally, under the condition that other designs of the engine are unchanged, the higher the compression ratio is, the higher the vehicle power is, the higher the efficiency is, and the better the fuel economy is; According to the Chinese patent publication No. CN105626258B, a hydraulic drive type variable compression ratio piston connecting rod assembly is disclosed, and the size of the internal volume of a main oil cavity is changed through hydraulic drive, so that the compression ratio of an engine is changed, the operation is reliable, and the response is rapid; But in this technical scheme's extension spring both ends only through convex flat key card go into the recess of seting up on piston lower part of the body and the piston upper part of the body, accomplish the installation fixed to extension spring, and convex flat key possesses limit structure in the recess, leads to convex flat key to slide out from the recess easily, makes extension spring be difficult to realize stable to the piston lower part of the body and the piston upper part of the body connect fixedly to influence the normal regulation of compression ratio, therefore, we propose a hydraulic drive formula variable compression ratio piston connecting rod assembly. Disclosure of utility model In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that: the utility model provides a variable compression ratio piston connecting rod assembly of hydraulic drive, includes piston upper body and piston lower body, piston upper body and piston lower body each other block, cylinder cavity in the middle of piston upper body and the piston lower body is the main oil pocket, the connecting rod is installed to piston lower body bottom, be connected with elastic component between piston upper body and the piston lower body, elastic component includes solid fixed ring one, solid fixed ring two and spring one, gu fixed ring one installs respectively at the top and solid fixed ring two bottom and connects frame one and connecting frame two, spring one installs between connecting frame one and connecting frame two, locating column one and locating column two are installed respectively at piston lower body top and piston upper body bottom, locating column one and locating column two are seted up locating hole one and locating hole two respectively on solid fixed ring two, gu fixed ring one top and solid fixed ring two bottom all sliding connection have the card frame, locating column one and locating column two outer walls all have seted up the draw-in groove, the draw-in groove. As a preferred embodiment of the utility model, the number of the first positioning column, the second positioning column, the first positioning hole and the second positioning hole is four, the first positioning column and the second positioning column are respectively matched with the first positioning hole and the positioning Kong Erxiang, and the first positioning column and the second positioning column are arranged to respectively limit the first fixing ring and the second fixing ring. As a preferred embodiment of the present utility model, the clamping frame is adapted to the clamping groove, and the clamping frame is arranged to be clamped into the clamping groove, so that the first fixing ring and the second fixing ring can be fixed. As a preferred implementation mode of the utility model, the outer wall of the clamping frame is provided with the limit sliding blocks, the outer walls of the first fixing ring and the second fixing ring are respectively provided with the limit sliding grooves, the limit sliding blocks are in sliding connection with the limit sliding grooves, the inner wall of the limit sliding grooves is provided with the limit rod, the limit rod movably penetrates through the limit sliding blocks, the outer wall of the limit rod surrounds the second spring, the second spring is arranged between one side of the limit sliding blocks and the inner wall of the limit sliding grooves, and the limit rod is arranged to limit the limit sliding blocks and the second spring, so that