Multi-station small connecting rod floating hydraulic clamp

Abstract

The invention provides a multi-station small connecting rod floating hydraulic clamp, which belongs to the technical field of machining, and comprises a bottom plate, a positioning plate is arranged above the bottom plate, the bottom plate and the positioning plate are connected through a vertical plate to form a cavity, at least one oil cylinder is arranged in the cavity, and a small head support and a large head support are arranged on the positioning plate. A connecting rod workpiece is placed on the small-head support and the large-head support, and a V-shaped block is arranged at the small-head end of the connecting rod workpiece. The connecting rod positioning device has the beneficial effects that the connecting rod large head and the connecting rod small head are clamped to the large head support and the small head support respectively, the connecting rod abuts against the fixed positioning block through a pusher dog of the elastic pusher dog mechanism, and meanwhile, the connecting rod small head abuts against the V-shaped block, so that positioning of the connecting rod is achieved; and the floating pressing mechanism can be driven to move to fix the connecting rod, so that the connecting rod is conveniently machined, secondary clamping is not needed, the overall machining efficiency is high, the machining precision is high, and the using effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a multi-station small connecting rod floating hydraulic clamp. Background Art

[0002] The connecting rod, whose English name is connecting rod, is a steel bar in the machine that transmits the reciprocating motion of the piston to the crankshaft or the rotational motion of the crankshaft to the piston. In reciprocating piston power machinery and compressors, the connecting rod is used to connect the piston and the crank (or crankshaft), and plays an important role in converting the reciprocating motion of the piston into the rotational motion of the crankshaft and transmitting the force acting on the piston to the crankshaft to output power. The connecting rod body is usually composed of three parts: 1) The small end of the connecting rod, which is connected to the piston pin, is mostly a thin-walled circular ring structure. In order to reduce the wear between the piston pin and the small end, a thin-walled bronze bushing is pressed into the hole of the small end; 2) The big end of the connecting rod, which is connected to the crankshaft; 3) The connecting rod body, the rod part connecting the small end and the big end, is a long rod, which is also subjected to greater force during work. In order to prevent it from bending and deformation, the rod body must have sufficient rigidity. In addition, the connecting rod is mostly a steel part, and the cross-section of its main part is mostly circular or I-shaped, with holes at both ends, and bronze bushings or needle bearings are installed in the holes for the shaft pin to be installed to form a hinge.

[0003] At present, the market demand for small gasoline-powered machinery has increased significantly, driving the increase in demand for its parts processing. Among them, the processing of small connecting rods, which are the core components of the power part, is an important part. At present, the processing of connecting rods usually uses a single-hole processing method, that is, after one hole is processed, the processed hole is used to locate and process another hole, which requires secondary clamping, is inefficient, and has poor ability to ensure center distance accuracy. Therefore, a fixture is needed that can process the two holes of the connecting rod without secondary clamping. Summary of the invention

[0004] The purpose of the present invention is to propose a multi-station small connecting rod floating hydraulic clamp, which does not require secondary clamping of the connecting rod and can directly process the large head and the small head, thereby improving the processing efficiency and processing accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a multi-station small connecting rod floating hydraulic clamp, including a base plate, a positioning plate is arranged above the base plate, the base plate and the positioning plate are connected by a vertical plate to form a cavity, at least one oil cylinder is installed in the cavity, a small head support and a large head support are installed on the positioning plate, a connecting rod workpiece is placed on the small head support and the large head support, a V-shaped block is arranged at the small head end of the connecting rod workpiece, a fixed positioning block is arranged on one side of the large head end of the connecting rod workpiece, a floating clamping mechanism and an elastic claw mechanism are also installed on the positioning plate, and the floating clamping mechanism abuts against the top of the connecting rod workpiece The claw of the elastic claw mechanism abuts against the other side of the big end of the connecting rod workpiece, and the bottom of the floating clamping mechanism is connected to the telescopic end of the oil cylinder. When in use, the big end of the connecting rod and the small end of the connecting rod are respectively clamped on the big end support and the small end support, and the connecting rod is abutted against the fixed positioning block by the claw of the elastic claw mechanism. At the same time, the small end of the connecting rod abuts against the V-shaped block to achieve the positioning of the connecting rod. The floating clamping mechanism can be driven to move by the up and down movement of the oil cylinder to achieve the fixation of the connecting rod, so as to facilitate the processing of the connecting rod without the need for secondary clamping. The overall processing efficiency is high, the processing accuracy is high, and the use effect is good.

[0006] Furthermore, the floating clamping mechanism includes a first-level floating plate, the bottom of which is threadedly connected to the telescopic end of the oil cylinder through a thread, two second-level floating plates are rotatably connected to the first-level floating plate, four pressure blocks are rotatably connected to the two second-level floating plates, and the four pressure blocks are all abutted against the top of the connecting rod workpiece. The first-level floating plate is driven to move up and down by the oil cylinder, the second-level floating plate is driven to move up and down by the first-level floating plate, and the pressure blocks are driven to move by the second-level floating plate, thereby achieving the fixing and loosening of the connecting rod.

[0007] Furthermore, a positioning stopper is provided on the outer side of the floating clamping mechanism, and the positioning stopper abuts against one side of the pressing block, so that the floating clamping mechanism can be positioned by the positioning stopper.

[0008] Furthermore, the elastic claw mechanism includes a base and a claw, the base is rotatably connected to the claw, a spring is arranged between the base and the claw, the base is mounted on the positioning plate, the claw abuts against the big end of the connecting rod workpiece, and the claw of the elastic claw mechanism can apply force to the connecting rod workpiece to prevent the connecting rod from moving, thereby ensuring the positioning effect of the connecting rod.

[0009] Furthermore, the small head support and the large head support are fixed on the positioning plate by interference fit.

[0010] Furthermore, the small head support and the large head support are both circular, and the small head end and the large head end of the connecting rod workpiece are respectively clamped with the small head support and the large head support.

[0011] Furthermore, the V-shaped opening of the V-shaped block is arranged in a horizontal direction and abuts against the small head end of the connecting rod workpiece.

[0012] Furthermore, a protrusion is provided on one side of the fixed positioning block close to the connecting rod workpiece, and the protrusion abuts against the connecting rod workpiece.

[0013] It can be seen from the above technical solutions that the present invention has the following advantages: By clamping the big end and the small end of the connecting rod on the big end support and the small end support respectively, the connecting rod is abutted against the fixed positioning block through the claw of the elastic claw mechanism, and at the same time, the small end of the connecting rod is abutted against the V-shaped block to achieve the positioning of the connecting rod. The floating clamping mechanism can be driven to move by the up and down movement of the oil cylinder to achieve the fixation of the connecting rod, so as to facilitate the processing of the connecting rod without the need for secondary clamping, with high overall processing efficiency, high processing accuracy and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the floating clamping mechanism of the present invention.

[0017] Figure 3 It is a schematic cross-sectional structure diagram of the floating clamping mechanism of the present invention.

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the elastic claw mechanism of the present invention.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixed positioning block of the present invention.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the positioning stopper of the present invention.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the V-shaped block of the present invention.

[0022] Figure 8 It is a schematic diagram of the cross-sectional structure of the big head support of the present invention.

[0023] Fig. 9 It is a schematic diagram of the cross-sectional structure of the small head support of the present invention.

[0024] In the figure: 1. Cylinder; 2. Vertical plate; 3. Bottom plate; 4. V-shaped block; 5. Floating clamping mechanism; 6. Small head support; 7. Positioning block; 8. Elastic claw mechanism; 9. Positioning plate; 10. Big head support; 11. Connecting rod workpiece; 12. Fixed positioning block; 13. Secondary floating plate; 14. Primary floating plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0026] like Figure 1-9 As shown, this embodiment proposes a multi-station small connecting rod floating hydraulic clamp, including a base plate 3, a positioning plate 9 is arranged above the base plate 3, the base plate 3 and the positioning plate 9 are connected by a vertical plate 2 to form a cavity, at least one oil cylinder 1 is installed in the cavity, a small head support 6 and a large head support 10 are installed on the positioning plate 9, the small head support 6 and the large head support 10 are fixed on the positioning plate 9 by interference fit, a connecting rod workpiece 11 is placed on the small head support 6 and the large head support 10, both of which are circular, the small head end and the large head end of the connecting rod workpiece 11 are respectively clamped with the small head support 6 and the large head support 10, and the connecting rod workpiece 11 is connected to the small head support 6 and the large head support 10. A V-shaped block 4 is provided at the small head end of the rod workpiece 11, and the V-shaped opening of the V-shaped block 4 is arranged in a horizontal direction and abuts against the small head end of the connecting rod workpiece 11. A fixed positioning block 12 is provided on one side of the large head end of the connecting rod workpiece 11, and a protrusion is provided on the side of the fixed positioning block 12 close to the connecting rod workpiece 11, and the protrusion abuts against the connecting rod workpiece 11. A floating clamping mechanism 5 and an elastic pawl mechanism 8 are also installed on the positioning plate 9. The floating clamping mechanism 5 abuts against the top of the connecting rod workpiece 11, and the pawl of the elastic pawl mechanism 8 abuts against the other side of the large head end of the connecting rod workpiece 11, and the bottom of the floating clamping mechanism 5 is connected to the telescopic end of the cylinder 1.

[0027] Specifically, the floating clamping mechanism 5 includes a primary floating plate 14, the bottom of which is threadedly connected to the telescopic end of the oil cylinder 1 through a thread, and two secondary floating plates 13 are rotatably connected to the primary floating plate 14, and four pressure blocks are rotatably connected to the two secondary floating plates 13, and the four pressure blocks are all abutted against the top of the connecting rod workpiece 11. The primary floating plate 14 is driven by the oil cylinder 1 to move up and down, and the secondary floating plate 13 is driven by the primary floating plate 14 to move up and down, and the pressure blocks are driven by the secondary floating plate 13 to move, so as to fix and loosen the connecting rod, and a positioning block 7 is arranged on the outer side of the floating clamping mechanism 5, and the positioning block 7 abuts against one side of the pressure block, and the floating clamping mechanism 5 can be positioned by the positioning block 7.

[0028] Among them, the elastic claw mechanism 8 includes a base and a claw, the base is rotatably connected to the claw, a spring is arranged between the base and the claw, the base is mounted on the positioning plate 9, the claw abuts against the big end of the connecting rod workpiece 11, and the claw of the elastic claw mechanism 8 can apply force to the connecting rod workpiece 11 to prevent the connecting rod from moving and ensure the positioning effect of the connecting rod.

[0029] When in use, the big end and the small end of the connecting rod are respectively clamped on the big end support 10 and the small end support 6, and the connecting rod is abutted against the fixed positioning block 12 by the claw of the elastic claw mechanism 8. At the same time, the small end of the connecting rod abuts against the V-shaped block 4 to achieve the positioning of the connecting rod. The floating clamping mechanism 5 can be driven to move by the up and down movement of the cylinder 1 to achieve the fixation of the connecting rod, so as to facilitate the processing of the connecting rod without secondary clamping. The overall processing efficiency is high, the processing accuracy is high, and the use effect is good.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-station small connecting rod floating hydraulic clamp, comprising a base plate (3), characterized in that: A positioning plate (9) is arranged above the bottom plate (3). The bottom plate (3) and the positioning plate (9) are connected via a vertical plate (2) to form a cavity. At least one oil cylinder (1) is installed in the cavity. A small head support (6) and a large head support (10) are installed on the positioning plate (9). A connecting rod workpiece (11) is placed on the small head support (6) and the large head support (10). A V-shaped block (4) is arranged at the small head end of the connecting rod workpiece (11). A fixed positioning block (12) is arranged on one side of the large head end of the connecting rod workpiece (11). A floating clamping mechanism (5) and an elastic pawl mechanism (8) are also installed on the positioning plate (9). The floating clamping mechanism (5) abuts against the top of the connecting rod workpiece (11). The pawl of the elastic pawl mechanism (8) abuts against the other side of the large head end of the connecting rod workpiece (11). The bottom of the floating clamping mechanism (5) is connected to the telescopic end of the oil cylinder (1).

2. The multi-station small connecting rod floating hydraulic clamp according to claim 1 is characterized in that: The floating clamping mechanism (5) comprises a primary floating plate (14), the bottom of which is threadedly connected to the telescopic end of the oil cylinder (1) via a thread, the primary floating plate (14) being rotatably connected to two secondary floating plates (13), the two secondary floating plates (13) being rotatably connected to four pressing blocks, the four pressing blocks all being in contact with the top of the connecting rod workpiece (11).

3. The multi-station small connecting rod floating hydraulic clamp according to claim 2 is characterized in that: A positioning stopper (7) is provided on the outer side of the floating pressing mechanism (5), and the positioning stopper (7) abuts against one side of the pressing block.

4. The multi-station small connecting rod floating hydraulic clamp according to claim 1 is characterized in that: The elastic claw mechanism (8) comprises a base and a claw, the base is rotatably connected to the claw, a spring is arranged between the base and the claw, the base is mounted on the positioning plate (9), and the claw abuts against the large end of the connecting rod workpiece (11).

5. The multi-station small connecting rod floating hydraulic clamp according to claim 1 is characterized in that: The small head support (6) and the large head support (10) are fixed on the positioning plate (9) by interference fit.

6. The multi-station small connecting rod floating hydraulic clamp according to claim 5 is characterized in that: The small head support (6) and the large head support (10) are both circular, and the small head end and the large head end of the connecting rod workpiece (11) are respectively clamped with the small head support (6) and the large head support (10).

7. The multi-station small connecting rod floating hydraulic clamp according to claim 1 is characterized in that: The V-shaped opening of the V-shaped block (4) is arranged in a horizontal direction and abuts against the small end of the connecting rod workpiece (11).

8. The multi-station small connecting rod floating hydraulic clamp according to claim 6 is characterized in that: A protrusion is provided on one side of the fixed positioning block (12) close to the connecting rod workpiece (11), and the protrusion abuts against the connecting rod workpiece (11).

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