CN-122007946-A - Multi-station hydraulic clamp for passenger car steering knuckle and application method thereof

CN122007946ACN 122007946 ACN122007946 ACN 122007946ACN-122007946-A

Abstract

The application provides a multi-station hydraulic clamp for a steering knuckle of a passenger car, which comprises a base, a common clamping station, a first independent clamping station and a second independent clamping station, wherein the common clamping station is arranged on the side face of the base, the common clamping station comprises a common positioning piece for positioning a middle arm rod part, a common pressing component for pressing the middle arm rod part, a first independent pressing component for pressing a side arm rod part of a left steering knuckle, and a second independent pressing component for pressing a side arm rod part of a right steering knuckle, so that the left steering knuckle or the right steering knuckle clamped at a single time is positioned and fixed and takes a first processing posture to finish the processing of a first part set to be processed, and the first independent clamping station and the second independent clamping station are arranged on the top face of the base in parallel and respectively comprise a positioning mandrel and a pressing component, and the target steering knuckle is positioned and fixed and takes a second processing posture to finish the processing of a second part set to be processed by penetrating an opening hub installation part through the positioning mandrel and pressing components. The production efficiency is improved, the auxiliary time length is reduced, and the machining precision is improved by only clamping twice.

Inventors

ZHANG YUNJUN
ZHU YIN
Ren Xuanyi
DU XIN
WANG ZHANBING
XU SHENGRONG
HU HONGBIN
LI JIAN
SHEN YINAN
XU JIHONG
YANG YUE

Assignees

湖北三环锻造有限公司

Dates

Publication Date: 20260512
Application Date: 20260306

Claims (10)

1. Multi-station hydraulic clamp for passenger car steering knuckle is characterized in that it includes: A base (1); The common clamping station (101) is arranged on the side face of the base (1), and comprises a common positioning piece (61) for positioning the middle arm rod part (501), a common pressing component (71) for pressing the middle arm rod part (501), a first independent pressing component (72) for pressing the side arm rod part (502) of the left knuckle (51) and a second independent pressing component (73) for pressing the side arm rod part (502) of the right knuckle (52), so that the left knuckle (51) or the right knuckle (52) clamped at a single time is positioned and fixed and takes a first processing posture to finish the processing of a first part set to be processed; The first independent clamping station (102) and the second independent clamping station (103) are arranged on the top surface of the base (1) in parallel and respectively comprise a positioning mandrel (8) and a pressing assembly (9), and the positioning mandrel and the pressing assembly are used for enabling the target knuckle to be positioned and fixed and to be in a second machining posture by enabling the opening hub mounting portion (503) to penetrate through the corresponding positioning mandrel (8) and be pressed by the corresponding pressing assembly (9) so as to finish machining of a second part set to be machined.
2. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The shared positioning piece (61) is a floating ball plunger; the floating ball plunger comprises a plunger shell and a ball head which is arranged in the plunger shell and supported by a spring, wherein a positioning groove is formed in the bottom of the middle arm rod part (501) and is used for jacking into the positioning groove under the action of the spring when a target steering knuckle is placed.
3. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The common clamping station (101) further comprises an auxiliary clamping assembly (11); the auxiliary clamping assembly (11) comprises a rotating shaft (111) perpendicular to the side face and a swinging rod (112) perpendicularly hinged to the rotating shaft (111), wherein the rotating shaft (111) is in threaded rotation connection with the side face and is lifted along the length direction of the rotating shaft, and the swinging rod (112) is rotated to be level with the height of the opening hub mounting part (503) and is rotated to be propped against the opening hub mounting part (503) after a target knuckle is placed.
4. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The common clamping station (101) further comprises at least one left independent positioning piece (62) and at least one right independent positioning piece (63); The left independent locating piece (62) is connected with or separated from a locating groove arranged on a side arm rod part (502) of the left steering knuckle (51), and the right independent locating piece (63) is connected with or separated from a locating groove arranged on a side arm rod part (502) of the right steering knuckle (52) so as to be used for respectively matching with the common locating piece (61) to realize locating when the left steering knuckle (51) and the right steering knuckle (52) are placed.
5. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: the common compressing assembly (71), the first independent compressing assembly (72) and the second independent compressing assembly (73) are all hydraulic compressing mechanisms; The hydraulic pressing mechanism comprises a hydraulic cylinder (701), a connecting rod (702) hinged with a piston rod of the hydraulic cylinder (701), and a pressing arm (703) hinged with the connecting rod (702), and is used for pushing the pressing arm (703) to rotate through the connecting rod (702) when the piston rod of the hydraulic cylinder (701) stretches out; The first independent compression assembly (72) and the second independent compression assembly (73) both comprise two hydraulic compression mechanisms and are arranged at corresponding positions of the side surfaces so as to apply compression force to a side arm rod part (502) and an opening hub mounting part (503) of the target knuckle.
6. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The pressing assembly (9) comprises a driving motor arranged in the positioning mandrel (8) and a plurality of pins (91) in transmission connection with the driving motor, the pins (91) are in threaded rotation connection with the surface of the positioning mandrel (8), and the pins (91) are lifted along the length direction of the pins; each pin shaft (91) is hinged with an abutting valve (92) capable of axially rotating, so that the driving motor drives the pin shafts (91) to lift and rotate, and the pin shafts (91) drive the abutting valve (92) to lift and rotate the abutting valve (92) to an opening hub mounting part (503) abutting against a target knuckle, so that limiting and fixing of the target knuckle are achieved.
7. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The first independent clamping station (102) and the second independent clamping station (103) are further provided with a plurality of positioning pins (2), and the opening hub mounting part (503) of the target knuckle is further provided with an opening (10) connected with or separated from the corresponding positioning pin (2).
8. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: The first independent clamping station (102) and the second independent clamping station (103) are also provided with a plurality of auxiliary hydraulic supports (3); The supporting end face of the auxiliary hydraulic supporting piece (3) is parallel to the contact face corresponding to the target knuckle.
9. The multi-station, multi-station hydraulic clamp for a passenger car knuckle of claim 1, wherein: An open hub mounting (503) of a target knuckle fixed to the common clamping station (101) is positioned, and a machining avoidance opening (4) is formed in an area of the open hub mounting, which is axially projected onto the base (1).
10. The application method of the multi-station hydraulic clamp for the steering knuckle of the passenger car is characterized by comprising the following steps of: Providing the multi-station hydraulic clamp for the passenger car steering knuckle according to claim 1; The common locating piece (61) and the common compressing assembly (71) are operated to locate and compress the middle arm rod part (501) of the target steering knuckle, if the target steering knuckle is a left steering knuckle (51), the first independent compressing assembly (72) is operated to compress the side arm rod part (502), if the target steering knuckle is a right steering knuckle (52), the second independent compressing assembly (73) is operated to compress the side arm rod part (502), the target steering knuckle is in a first processing posture, a machine tool is started, and the processing of a first part set to be processed of the target steering knuckle is completed; the method comprises the steps of moving a target knuckle which is processed by a first to-be-processed part set to a corresponding first independent clamping station (102) or second independent clamping station (103), penetrating an opening hub mounting part (503) through a positioning mandrel (8), operating a pressing component (9) to press the target knuckle to enable the target knuckle to be in a second processing posture, and starting a machine tool to complete processing of the second to-be-processed part set of the target knuckle.

Description

Multi-station hydraulic clamp for passenger car steering knuckle and application method thereof Technical Field The invention relates to the technical field of machining, in particular to a multi-station hydraulic clamp for a steering knuckle of a passenger car and a use method thereof. Background The steering knuckle is a key safety component of the automobile, and the left steering knuckle and the right steering knuckle are mirror symmetry structures. For example, a left knuckle generally includes a main structure such as a split hub mounting portion, a center arm lever portion, and a left arm lever portion, and a right knuckle has a split hub mounting portion, a center arm lever portion, and a right arm lever portion (the left arm lever portion and the right arm lever portion may be referred to as side arm lever portions) that are mirror images of the main structure. Because of the complex structure, the processing holes or the processing surfaces are distributed in a plurality of directions in space, and all processing cannot be completed in a single clamping posture. Therefore, production modes of repeated clamping and sequential processing are commonly adopted in the industry. Namely, one knuckle blank can be subjected to clamping and positioning for three or more times on one or more machine tools to gradually finish the processing of all parts. The machining mode has the defects that the machining time of a machine tool is occupied for each clamping, dismounting and repositioning, and the intervention of operators is needed, so that the production efficiency is low, and the auxiliary time is long. Secondly, it is more critical that each re-clamping introduces new positioning errors that can be transferred and accumulated between the processes, resulting in difficult assurance of the machining accuracy and consistency of the final workpiece, and even waste. While there are designs of multi-station jigs, they are typically focused on single-process parallel processing, and do not fundamentally reduce the number of clamping required for a single workpiece. Therefore, how to minimize the clamping frequency of a single workpiece through reasonable clamp structure integration while ensuring the production efficiency has become a technical problem to be solved in the field. Disclosure of Invention The application provides a multi-station hydraulic clamp for a steering knuckle of a passenger car and a use method thereof, which aim to solve the technical problems that the existing clamp is complex in structure and low in integration level, and a single steering knuckle can be completely machined only by three or more clamping processes, so that the production efficiency is low, the auxiliary time is long, accumulated errors are easy to generate in multiple positioning processes, and the machining precision is affected. In a first aspect, an embodiment of the present application provides a multi-station hydraulic clamp for a passenger car knuckle, including: A base; The common clamping station comprises a common positioning piece for positioning the middle arm rod part, a common pressing component for pressing the middle arm rod part, a first independent pressing component for pressing the side arm rod part of the left steering knuckle and a second independent pressing component for pressing the side arm rod part of the right steering knuckle, and is used for positioning and fixing the left steering knuckle or the right steering knuckle which is clamped for a single time and taking a first processing gesture to finish the processing of the first part set to be processed; The first independent clamping station and the second independent clamping station are arranged on the top surface of the base in parallel and respectively comprise a positioning mandrel and a pressing component, so that the target knuckle is positioned and fixed and is in a second machining posture by penetrating the opening hub mounting part through the corresponding positioning mandrel and pressing the corresponding pressing component, and machining of the second part set to be machined is completed. With reference to the first aspect, in one embodiment, the common positioning element is a floating ball plunger; The floating ball plunger comprises a plunger shell and a ball head which is arranged in the plunger shell and supported by a spring, wherein a positioning groove is formed in the bottom of the middle arm rod part, and the ball head is propped into the positioning groove under the action of the spring when the target knuckle is placed. With reference to the first aspect, in one embodiment, the common clamping station further includes an auxiliary clamping assembly; The auxiliary clamping assembly comprises a rotating shaft perpendicular to the side face and a swinging rod perpendicularly hinged with the rotating shaft, wherein the rotating shaft is in threaded rotation connection with the side face and is lifted along the length di