Hydraulic automatic clamp for turning double-oil-cylinder crankshaft connecting rod neck

Abstract

The utility model discloses a hydraulic automatic clamp for turning a double-oil-cylinder crankshaft connecting rod neck, and relates to the technical field of metal cutting. A main body is clamp bodies located on the two sides, a machining crankshaft is located between the two clamp bodies, double-hole one-piece oil cylinders and a force increasing mechanism are arranged in an inner cavity of each clamp body, and the two double-hole one-piece oil cylinders share one clamp body; the force increasing mechanism comprises two sets of hinge shafts, two sets of dovetail sliding blocks and two sets of dovetail swing rods which are symmetrical on the left side and the right side, a torsion shaft is arranged in the center of the large end of each dovetail swing rod, the small end of each dovetail swing rod is connected with the corresponding dovetail sliding block, the hinge shafts are arranged in the centers of the dovetail sliding blocks, a beam is connected between the two sets of hinge shafts, and the beam is arranged on a beam shaft in a sleeving mode. And the top end of the cross beam shaft is connected with a double-hole one-piece oil cylinder. The two double-hole one-piece oil cylinders share one oil cylinder body, the pressure of the oil cylinders is the same, the action of the cross beam is synchronous, clamping power generated by the hydraulic oil cylinders is amplified by the force amplifier and converted into torque, and the torque is transmitted to the clamping jaw through the torsion shaft, so that a crankshaft is clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of metal cutting, in particular to a hydraulic automatic clamp for turning a double-cylinder crankshaft connecting rod neck. Background Art

[0002] There are multiple process methods for rough machining and semi-finishing of crankshaft connecting rod necks, which can be achieved by milling and turning. The manufacturer should decide which process method to choose based on the size of the crankshaft specifications, the number of varieties, and the size of the batch. Different process methods will have a direct impact on the manufacturing cost, economic benefits, and product quality of the enterprise.

[0003] The geometric shape of a certain axis diameter or connecting rod neck of the crankshaft is a short cylinder. Turning is undoubtedly the most traditional, economical, simple and reliable process, and is still widely used. However, if the connecting rod neck is turned, the center line of the connecting rod neck must coincide with the center line of the lathe spindle. At this time, the center of the crankshaft deviates from the rotation center of the machine tool spindle. The dynamic balance problem caused by this makes the design of the automatic fixture for turning the crankshaft connecting rod neck very difficult. Utility Model Content

[0004] In order to solve the above problems, that is, to solve the above background technology, how to provide sufficient clamping force in a limited space, overcome the unsafe factors caused by centrifugal force and realize positioning clamping automation, the utility model proposes a double-cylinder crankshaft connecting rod neck turning hydraulic automatic clamp, and the specific technical solution is as follows:

[0005] A double-cylinder hydraulic automatic clamp for turning crankshaft connecting rod necks, wherein the clamp body is a clamp body 1 located on both sides, and the processed crankshaft 7 is located between the two clamp bodies 1. A double-hole one-piece cylinder 9 and a force-increasing mechanism are arranged in the internal cavity of the clamp body 1, and the two double-hole one-piece cylinders 9 share one clamp body 1; the force-increasing mechanism comprises two groups of hinge shafts 15 symmetrical on the left and right sides, two groups of dovetail sliders 11 and two groups of dovetail swing rods 10, the center position of the large end of the dovetail swing rod 10 is the torsion shaft 3, and the small end is connected to the dovetail slider 11, the center position of the dovetail slider 11 is the hinge shaft 15, a crossbeam 12 is connected between the two groups of hinge shafts 15, the crossbeam 12 is sleeved on the crossbeam shaft 13, and can swing up and down, and the top of the crossbeam shaft 13 is connected to the double-hole one-piece cylinder 9; the torsion shaft 3 is partially connected to the clamping jaws 4, and the clamping jaws 4 on both sides clamp the crankshaft 7.

[0006] Furthermore, the clamp is provided with an angular positioning mechanism, including an angular positioning rod 8, an angular positioning push rod 16, a positioning rod swing block 17, a push rod swing block 18, an angular piston 19, a connecting rod 20, an angular swing rod 21 and a transmission shaft 22. A positioning rod swing block 17 is provided above the torsion shaft 3 on one side, and the top of the positioning rod swing block 17 is connected to the angular positioning rod 8. A push rod swing block 18 is provided above the torsion shaft 3 on the other side, and the top of the push rod swing block 18 is connected to the angular positioning push rod 16. Both the positioning rod swing block 17 and the push rod swing block 18 are provided on the end surface of the clamp body 1; an angular piston 19 is provided at the lower end of the double-hole connected oil cylinder 9 inside the positioning rod swing block 17 and the push rod swing block 18, and a transmission shaft 22 is provided on the inner wall of the corresponding side clamp body 1, and the corresponding angular piston 19 is connected to the transmission shaft 22 through a connecting rod 20 and an angular swing rod 21.

[0007] Furthermore, a centering block 5 is provided below the crankshaft 7 on the end surface of the clamp body 1 , and the centering block 5 is fixed above the centering block support 14 .

[0008] Furthermore, the outer end surface of the clamp body 1 is provided with clamp teeth 2 .

[0009] The beneficial technical effects of the utility model are as follows: two double-hole connected cylinders share one cylinder body, the cylinder pressures are the same, the crossbeams move synchronously, the clamping power generated by the hydraulic cylinders is amplified by the force-amplifying mechanism and converted into torque, which is transmitted to the clamping claws through the torque shaft to achieve clamping of the crankshaft; the angular positioning mechanism is positioned with the crankshaft pre-processing reference surface during loading, ensuring that the angular position of the connecting rod neck in the circular axis direction meets the design requirements; all action programs are set by the machine tool CNC system to achieve automatic positioning and clamping of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of an implementation method of the utility model;

[0011] Figure 2 It is a schematic diagram of the structure of the force amplification mechanism;

[0012] Figure 3 It is a schematic diagram of the centering clamping structure;

[0013] Figure 4 It is the base of the centering block;

[0014] Figure 5 Schematic diagram of dovetail swing rod structure;

[0015] Figure 6 It is a schematic diagram of the dovetail slider structure;

[0016] Figure 7 This is a schematic diagram of the double-hole one-piece oil cylinder structure;

[0017] Figure 8 is a schematic diagram of the beam structure;

[0018] Fig. 9 The figure is a schematic diagram of the specific structure of the clamp;

[0019] Fig.10 Schematic diagram of the torque shaft structure.

[0020] Attached figure mark 1, clamping body; 2, clamping body teeth; 3, torque shaft; 4, clamping claw; 5, centering block; 7, processing crankshaft; 8, angular positioning rod; 9, double-hole one-piece cylinder; 10, dovetail rocker arm; 11, dovetail slider; 12, crossbeam; 13, crossbeam shaft; 14, centering block support; 15, hinge shaft; 16, angular positioning push rod; 17, positioning rod rocker block; 18, push rod rocker block; 19, angular piston; 20, connecting rod; 21, angular rocker arm; 22, transmission shaft. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] A double-cylinder hydraulic automatic clamp for turning crankshaft connecting rod necks, wherein the clamp body is a clamp body 1 located on both sides, and the processed crankshaft 7 is located between the two clamp bodies 1. A double-hole one-piece cylinder 9 and a force-increasing mechanism are arranged in the internal cavity of the clamp body 1, and the two double-hole one-piece cylinders 9 share one clamp body 1; the force-increasing mechanism comprises two groups of hinge shafts 15 symmetrical on the left and right sides, two groups of dovetail sliders 11 and two groups of dovetail swing rods 10, the center position of the large end of the dovetail swing rod 10 is the torsion shaft 3, and the small end is connected to the dovetail slider 11, the center position of the dovetail slider 11 is the hinge shaft 15, a crossbeam 12 is connected between the two groups of hinge shafts 15, the crossbeam 12 is sleeved on the crossbeam shaft 13, and can swing up and down, and the top of the crossbeam shaft 13 is connected to the double-hole one-piece cylinder 9; the torsion shaft 3 is partially connected to the clamping jaws 4, and the clamping jaws 4 on both sides clamp the crankshaft 7.

[0023] The clamp is provided with an angular positioning mechanism, including an angular positioning rod 8, an angular positioning push rod 16, a positioning rod swing block 17, a push rod swing block 18, an angular piston 19, a connecting rod 20, an angular swing rod 21 and a transmission shaft 22. A positioning rod swing block 17 is provided above the torsion shaft 3 on one side, and the top end of the positioning rod swing block 17 is connected to the angular positioning rod 8. A push rod swing block 18 is provided above the torsion shaft 3 on the other side, and the top end of the push rod swing block 18 is connected to the angular positioning push rod 16. Both the positioning rod swing block 17 and the push rod swing block 18 are provided on the end face of the clamp body 1; an angular piston 19 is provided at the lower end of the double-hole connected oil cylinder 9 inside the positioning rod swing block 17 and the push rod swing block 18, and a transmission shaft 22 is provided on the inner wall of the corresponding side clamp body 1, and the corresponding angular piston 19 is connected to the transmission shaft 22 through a connecting rod 20 and an angular swing rod 21.

[0024] A centering block 5 is arranged below the crankshaft 7 on the end surface of the clamp body 1 , and the centering block 5 is fixed above a centering block support 14 .

[0025] The outer end surface of the clamp body 1 is provided with clamp teeth 2.

[0026] The utility model adopts the structural form of swing guide and training slider, the crossbeam fixed at the ends of the two oil cylinder piston rods, hinge holes are processed at symmetrical positions at both ends, connected with the slider through the hinge shaft, the dovetail groove on the slider matches the swing guide, one end of the swing guide is connected and fixed with the torque shaft, and the thrust generated by the clamping oil cylinder is increased and converted into torque to be transmitted to the clamping claw, so as to realize the clamping function of the crankshaft. The clamping force is the largest when the angle between the dovetail swing rod and the clamping oil cylinder measuring rod is the smallest.

[0027] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0028] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0031] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. Double-cylinder crankshaft connecting rod neck turning hydraulic automatic fixture, characterized by: The clamp body is a clamp body (1) located on both sides, and the processing crankshaft (7) is located between the two clamp bodies (1). A double-hole connected oil cylinder (9) and a force-increasing mechanism are arranged in the internal cavity of the clamp body (1). The two double-hole connected oil cylinders (9) share one clamp body (1); the force-increasing mechanism comprises two groups of hinge shafts (15) symmetrically arranged on the left and right sides, two groups of dovetail sliders (11) and two groups of dovetail swing rods (10). The center position of the large end of the dovetail swing rod (10) is the torsion shaft (3), and the small end is connected to the dovetail slider (11). The center position of the dovetail slider (11) is the hinge shaft (15). A crossbeam (12) is connected between the two groups of hinge shafts (15). The crossbeam (12) is sleeved on the crossbeam shaft (13) and can swing up and down. The top end of the crossbeam shaft (13) is connected to the double-hole connected oil cylinder (9); the torsion shaft (3) is partially connected to the clamping claws (4), and the clamping claws (4) on both sides clamp the crankshaft (7).

2. The double-cylinder crankshaft connecting rod neck turning hydraulic automatic fixture according to claim 1 is characterized by: The fixture is provided with an angular positioning mechanism, comprising an angular positioning rod (8), an angular positioning push rod (16), a positioning rod swing block (17), a push rod swing block (18), an angular piston (19), a connecting rod (20), an angular swing rod (21) and a transmission shaft (22); a positioning rod swing block (17) is provided above the torsion shaft (3) on one side, the top end of the positioning rod swing block (17) is connected to the angular positioning rod (8); a push rod swing block (18) is provided above the torsion shaft (3) on the other side, the push rod swing block (18) The top of the block (18) is connected to the angular positioning push rod (16), and the positioning rod swing block (17) and the push rod swing block (18) are both arranged on the end surface of the clamp body (1); an angular piston (19) is arranged at the lower end of the double-hole connected oil cylinder (9) inside the positioning rod swing block (17) and the push rod swing block (18), and a transmission shaft (22) is arranged on the inner wall of the corresponding side clamp body (1), and the corresponding angular piston (19) and the transmission shaft (22) are connected through a connecting rod (20) and an angular swing rod (21).

3. The double-cylinder crankshaft connecting rod neck turning hydraulic automatic fixture according to claim 1 is characterized in that: A centering block (5) is arranged below the crankshaft (7) on the end surface of the clamp body (1), and the centering block (5) is fixed above the centering block support (14).

4. The double-cylinder crankshaft connecting rod neck turning hydraulic automatic fixture according to claim 1 is characterized in that: The outer end surface of the clamp body (1) is provided with clamp teeth (2).

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