Hydraulic clamp for rough machining of left steering knuckle

Abstract

The utility model discloses a left steering knuckle rough machining hydraulic clamp which is characterized in that the left steering knuckle rough machining hydraulic clamp comprises a clamp body, a first end positioning nail, a second end positioning nail and a third end positioning nail which are arranged in a triangular mode are arranged on the clamp body, and a vertically-lifting edge cutting positioning pin is arranged on the connecting line between the first end positioning nail and the third end positioning nail. A side positioning seat is arranged on the clamp body, a horizontally-arranged positioning screw is arranged on the side positioning seat, pressing plates are correspondingly arranged above the first end positioning nail, the second end positioning nail and the third end positioning nail, and a horizontally-moving side pressing head is arranged in the right opposite direction of the positioning screw. The device has the advantages that the liftable trimming positioning pin is used for positioning the center bearing hole of the left steering knuckle, complete positioning is achieved through the three end positioning nails and the side positioning nails, the trimming positioning pin sinks during machining, and therefore the end face and the inner circle face of the bearing hole can be machined; the supporting strength is improved by arranging the auxiliary supports, and workpiece deformation is avoided.

Description

Technical Field

[0001] The utility model relates to the field of machining fixtures, in particular to a hydraulic fixture for rough machining of a left steering knuckle. Background Art

[0002] The steering knuckle, also known as the "ram's horn", is one of the important parts in the automobile steering axle. It can make the car run stably and sensitively transmit the driving direction. The function of the steering knuckle is to transmit and bear the front load of the car, support and drive the front wheels to rotate around the kingpin to turn the car. When the car is in driving state, it is subjected to variable impact loads, therefore, it is required to have very high strength.

[0003] The left steering knuckle is a part used for steering the left front wheel of a car. It is made into a blank by die casting or forging, and then the bearing hole, end face and other connection holes are machined by the machining center. The blank of the steering knuckle has a special-shaped structure, so it is difficult to clamp and position it. Whether the fixture is designed reasonably during the machining process determines the quality of the parts. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a hydraulic clamp for rough machining of a left steering knuckle, which can achieve orderly positioning and clamping and has high clamping stability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic clamp for rough machining of a left steering knuckle, characterized in that it comprises a clamping body, on which a first end positioning pin, a second end positioning pin and a third end positioning pin arranged in a triangle are provided, a vertically lifting chamfering positioning pin is provided on the connecting line between the first end positioning pin and the third end positioning pin, a side positioning seat is provided on the clamping body, a horizontally arranged positioning screw is provided on the side positioning seat, pressure plates are correspondingly provided above the first end positioning pin, the second end positioning pin and the third end positioning pin, and a horizontally movable side pressure head is provided in the direction opposite to the positioning screw.

[0007] Furthermore, an auxiliary support assembly is disposed on the clamp body, and a first lever clamping cylinder is correspondingly disposed above the auxiliary support assembly.

[0008] Furthermore, the lower ends of the first end positioning nail, the second end positioning nail and the third end positioning nail all have threaded sections, which are threadedly connected to the clamp body through the threaded sections, and the threaded sections are provided with locking nuts.

[0009] Furthermore, the pressing plate is driven by a second lever pressing cylinder.

[0010] Furthermore, the side pressure head is arranged on the clamp body through a straight-moving oil cylinder.

[0011] Furthermore, the auxiliary support assembly includes a vertically arranged elastic support column and a horizontally arranged locking mechanism, and the locking mechanism is driven by a cylinder.

[0012] Furthermore, the outer circumferential surface of the chamfered positioning pin is a conical surface, and the lower end of the chamfered positioning pin is connected to a lifting cylinder, and the lifting cylinder is arranged on the clamp body.

[0013] The beneficial effects of the utility model include: using a liftable chamfered locating pin to locate the center bearing hole of the left steering knuckle, and achieving complete positioning through three end locating pins and side locating pins; the chamfered locating pin sinks during processing, so that the end face and inner surface of the bearing hole can be machined; and the support strength is improved by setting auxiliary supports to avoid deformation of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 Top view of the . DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0017] A kind of Figure 1-2 The left steering knuckle rough machining hydraulic clamp shown in the figure includes a clamp body 1, on which are arranged a first end positioning nail 2, a second end positioning nail 3, and a third end positioning nail 4 in a triangular arrangement. The first end positioning nail 2, the second end positioning nail 3, and the third end positioning nail 4 have threaded sections at their lower ends, which are threadedly connected to the clamp body 1 through the threaded sections. The threaded sections are provided with locking nuts 12. The height of the end positioning nails can be accurately adjusted by threaded connection. After adjustment, the height is locked by the locking nuts 12. In this embodiment, the height of the first end positioning nail 2 is 57.1 mm, the height of the second end positioning nail 3 is 80.5 mm, and the height of the third end positioning nail 4 is 120 mm. The three end positioning nails support three positions at the bottom of the left steering knuckle respectively. A vertically raised and lowered chamfered positioning pin 5 is provided on the line between the first end positioning nail 2 and the third end positioning nail 4, which is used to locate the center bearing hole of the left steering knuckle.

[0018] A side positioning seat 6 is provided on the clamp body 1, and a horizontally arranged positioning screw 7 is provided on the side positioning seat 6 for positioning the side of the left steering knuckle. A pressure plate 8 is provided above the first end positioning nail 2, the second end positioning nail 3 and the third end positioning nail 4, and the pressure plate 8 is driven by the second lever clamping cylinder 13 to achieve the clamping of the left steering knuckle in the up and down directions. A horizontally movable side pressure head 9 is provided in the direction opposite to the positioning screw 7, and the side pressure head 9 is provided on the clamp body 1 through a straight oil cylinder 14, so as to press the left steering knuckle against the positioning screw 7.

[0019] The outer circumferential surface of the chamfering positioning pin 5 is a conical surface, and the lower end of the chamfering positioning pin 5 is connected to a lifting cylinder 16, which is arranged on the clamp body 1. When positioning the workpiece, the lifting cylinder 16 drives the chamfering positioning pin 16 to rise so as to achieve center positioning. After the clamping is completed, the chamfering positioning pin 16 is lowered during machining for avoidance.

[0020] In order to ensure that the position to be processed will not be deformed due to machining force during machining, an auxiliary support assembly 10 is provided on the clamp body 1 of this embodiment, and a first lever clamping cylinder 11 is correspondingly provided above the auxiliary support assembly 10 for clamping the workpiece.

[0021] The auxiliary support assembly 10 includes a vertically arranged elastic support column 15 and a horizontally arranged locking mechanism. The locking mechanism is driven by an oil cylinder. During clamping, the elastic support column 15 can adaptively adjust the support height according to the shape of the workpiece. When the workpiece is clamped, the height of the elastic support column 15 is limited by the locking mechanism so that it can form a fixed support effect, thereby cooperating with the first lever clamping cylinder 11 to achieve workpiece clamping.

[0022] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A hydraulic fixture for rough machining of a left steering knuckle, characterized in that: The invention comprises a clamp body (1), wherein the clamp body (1) is provided with a first end positioning pin (2), a second end positioning pin (3), and a third end positioning pin (4) arranged in a triangle, a vertically lifting chamfered edge positioning pin (5) is provided on the connecting line between the first end positioning pin (2) and the third end positioning pin (4), the clamp body (1) is provided with a side positioning seat (6), a horizontally arranged positioning screw (7) is provided on the side positioning seat (6), and pressure plates (8) are correspondingly provided above the first end positioning pin (2), the second end positioning pin (3), and the third end positioning pin (4), and a horizontally movable side pressure head (9) is provided in the direction opposite to the positioning screw (7).

2. A hydraulic fixture for rough machining of a left steering knuckle according to claim 1, characterized in that: An auxiliary support assembly (10) is arranged on the clamp body (1), and a first lever clamping cylinder (11) is correspondingly arranged above the auxiliary support assembly (10).

3. The hydraulic fixture for rough machining of a left steering knuckle according to claim 1, characterized in that: The first end positioning nail (2), the second end positioning nail (3) and the third end positioning nail (4) all have threaded sections at their lower ends, and are threadedly connected to the clamp body (1) via the threaded sections, and the threaded sections are provided with locking nuts (12).

4. The hydraulic fixture for rough machining of a left steering knuckle according to claim 1, characterized in that: The pressure plate (8) is driven by a second lever clamping cylinder (13).

5. The hydraulic fixture for rough machining of a left steering knuckle according to claim 1, characterized in that: The side pressure head (9) is arranged on the clamp body (1) via a straight-moving oil cylinder (14).

6. The hydraulic fixture for rough machining of a left steering knuckle according to claim 2, characterized in that: The auxiliary support assembly (10) comprises a vertically arranged elastic support column (15) and a horizontally arranged locking mechanism, wherein the locking mechanism is driven by an oil cylinder.

7. The hydraulic fixture for rough machining of a left steering knuckle according to claim 1, characterized in that: The outer circumferential surface of the chamfered positioning pin (5) is a conical surface, and the lower end of the chamfered positioning pin (5) is connected to a lifting cylinder (16), and the lifting cylinder (16) is arranged on the clamp body (1).

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