CN201058413Y

CN201058413Y - C-type clamp

Info

Publication number: CN201058413Y
Application number: CNU2007200690322U
Authority: CN
Inventors: 王汉义
Original assignee: WEITAI MACHINERY CO Ltd
Current assignee: WEITAI MACHINERY CO Ltd
Priority date: 2007-04-18
Filing date: 2007-04-18
Publication date: 2008-05-14
Anticipated expiration: 2017-04-18

Abstract

The utility model relates to a C-shaped clamp which comprises a clamp body (1), a rotary handle lever (2), a screw (3) and an active press stand (4). The screw (3) has double threads (31, 32); a fixed end (5) of the clamp body (1) has a threaded hole (51) for installing a V-shaped block (7) or an extension column (6). The C-shaped clamp belongs to a manual clamping tool which can fasten a flat workpiece and also can clamp a cylindrical (22) or an inner curved (32) workpiece, in addition, the utility model can realize the spanning clamping of a workpiece (42) with more convenient operation and effect saving.

Description

C type folder

Technical field

The utility model relates to a kind of C type folder, belongs to manual clamping tool, be used for to workpiece weld, clamping when processing etc. is handled, fixing.

Background technology

C type folder, because of its arcuate main body structure is gained the name, and if advance and retreat executing agency such as screw rod together, then as capitalization " G ", so make the G word press from both sides again.

C type folder is a clamping tool commonly used in people's daily life.Grind, saw, the workpiece of processing such as file or welding operation, generally all to clamp earlier, fixingly just can carry out.Present C type folder as shown in Figure 1, is made up of clamp, rotary handle bar, screw rod, movable presser feet.Wherein, the part that workpiece contacts with clamp is a stiff end, and the working face of stiff end and movable presser feet is the plane.During work, clamped workpiece is placed in the middle of stiff end and the movable presser feet, with hand the rotary handle bar is rotated, driving screw rod rotates in clamp, then movable presser feet is converted into rectilinear motion by rotatablely moving, thereby the distance of shortening activity presser feet and stiff end gradually promptly realizes clamping function.Workpiece disposes, and in the time of unclamping, with hand backward rotation rotary handle bar, drive activity presser feet leaves stiff end.

When workpiece was the flat object, above-mentioned C type folder was more easy to operate, reached the purpose of clamping, fixation workpiece easily.But when needs are crossed over clamping, or during clamp cylinders shape workpiece, or need fix other clamp fittings between clamp stiff end and workpiece the time, existing C type folder then can not be realized, gives in the practical application and has brought inconvenience.

Summary of the invention

The technical problems to be solved in the utility model is: a kind of novel C type folder is provided, can at the clamp stiff end multiple add ons be installed according to operator's needs, and easy to operate.

The technical solution adopted in the utility model is: the stiff end of C type folder has screw, can the required add ons of fitting operation person.

The add ons of the utility model C type folder is vee-block and extending column.

By screw vee-block is installed in C type clamping fixed end.The bipod activity of vee-block freely, the degree of tightness unanimity, no stuck phenomenon, and bipod can be inwardly, outwards upset, vee-block surface zinc electroplating with iridescent yellow chromate conversion coating.

When clamped workpiece is cylinder, vee-block two presser feets are inwardly overturn, the face of cylinder of cylindrical work is placed on vee-block two presser feets, rotate the rotary handle bar, movable presser feet pushing workpiece is to the bipod of vee-block, make the cylindrical side of workpiece all contact with bipod respectively, promptly workpiece is by three plain line contact activity presser feets and vee-block.During clamping, workpiece is made force analysis, as can be known: movable presser feet is delivered on the bipod the pressure of workpiece, and is decomposed into to the pressure at right angle of every pin with along the anti-frictional force on every pin plane.And by the principle of reaction of power as can be known, every pin makes that to the frictional force of workpiece workpiece is difficult for skidding.

When the clamped position of workpiece during at negative camber, vee-block two presser feets are outwards overturn, the curved surface of workpiece is placed on vee-block two presser feets, rotate the rotary handle bar, movable presser feet pushing workpiece is to the bipod of vee-block, make negative camber two places of workpiece all contact with bipod respectively, promptly workpiece is by three plain line contact activity presser feets and vee-block.

Extending column is screwed in the screw of C type clamping fixed end.Clamped workpiece is a groove class workpiece, and during as channel-section steel, I-steel, extending column can stride across the workpiece flank, enters in the workpiece groove.When rotating the rotary handle bar, thereby movable presser feet pushing workpiece realizes crossing over connection to extending column.

The screw rod of C type folder of the present utility model is adopted as double thread.The double helix screw thread is exactly a double thread, and its screw thread is enough become by two helixes, because of having strengthened pitch, thus can screw fast with laborsaving, and not easy to wear, long service life.

In addition, screw rod tail is a hexagonal prism.When using the handle reinforcing at need, can be by other instruments, as: spanner, clamp hexagonal prism, more afterburning by the lengthening arm of force.

C type of the present utility model folder can clamp the flat workpiece, can realize that also the leap of workpiece clamps, but also clamp cylinders body or negative camber workpiece.

Description of drawings

The utility model accompanying drawing is schematic drawing, can not represent the actual size relation, and has omitted Partial Feature as required in drawing.

Fig. 1 is an existing C type clamping structure schematic diagram;

Fig. 2 is the structural representation of the utility model C type folder;

Fig. 3 is the utility model C type folder clamp cylinders workpiece schematic diagram;

Fig. 4 is that the utility model C type folder clamps negative camber workpiece schematic diagram;

Fig. 5 is the structural representation of the vee-block of the utility model C type folder;

Fig. 6 is that the utility model C type folder is crossed over the clamping work pieces schematic diagram;

Fig. 7 is the structural representation of the extending column of the utility model C type folder.

The specific embodiment

C type folder of the present utility model, comprising: clamp 1, rotary handle bar 2, screw rod 3, movable presser feet 4 have screwed hole 51 on the stiff end 5 of clamp 1.

The helicitic texture of screw rod 3 is made of jointly screw thread 31, screw thread 32, and promptly double thread also can adopt unnecessary 2 multiple thread certainly.The afterbody of screw rod 3 is a hexagonal prism 33.

Vee-block 6,61 riveted joints are connected with bipod to make base 62 by two mushroom rivets 63.Saddle type spring washer 65 is in the middle of base 62 and pin 61, and pin 61 can stagger with base 62 around rivet 63 rotations under the effect of power.

Has hole 64 on the base 62.By screw 8, can be installed in vee-block 6 in the screwed hole 51 of C type clamping fixed end 5.

As shown in Figure 3, workpiece 22 is a cylinder, and workpiece 21 is a bluff body, welds together for making both, can realize clamping by V-block 6 is installed on C type folder.At this moment, two presser feets 61 of vee-block 6 are inwardly overturn, rotate rotary handle bar 2, screw rod 3 drive activity presser feets 4 push workpiece 21, and the face of cylinder of workpiece 22 is pressed on two presser feets 61 of vee-block 6, and workpiece 21 and workpiece 22 are fixed then.

As shown in Figure 4, workpiece 32 has negative camber, and workpiece 31 is a bluff body, welds together for making both, also can realize clamping by V-block 6 is installed on C type folder.At this moment, two presser feets 61 of vee-block 6 are outwards overturn, rotate rotary handle bar 2, screw rod 3 drive activity presser feets 4, pushing workpiece 31 also is pressed on the negative camber of workpiece 32 on two presser feets 61 of vee-block 6, and workpiece 31 and workpiece 32 are fixed then.

Extending column 7 one ends have screwed hole 72, so that other screwed add ons screw in, with the scope of application of further increase C type folder.Extending column 7 is installed in stiff end 5, the one end threadings 71 of C type folder for convenience.For making things convenient for extending column 7 in the screwed hole 51 of stiff end 5, to rotate, also can process annular knurl 73 in the side.

As shown in Figure 6, workpiece 41 and workpiece 42 are channel-section steel, and both are back-to-back to weld together in order to make, and can realize clamping by extending column 7 is installed on C type folder.At this moment, extending column 7 strides across the flank of workpiece 42, enters in the groove of workpiece 42.Rotate rotary handle bar 2, screw rod 3 drive activity presser feets 4 enter in the groove of workpiece 41, pushing workpiece 41, and be pressed on the workpiece 42, workpiece 41 and workpiece 42 are fixed then.

Claims

1. a C type folder comprises clamp (1), rotary handle bar (2), screw rod (3), movable presser feet (4), it is characterized in that: have screwed hole (51) on the stiff end (5) of clamp (1), and can the required add ons (6,7) of fitting operation person.

2. C type folder as claimed in claim 1 is characterized in that: the screw rod (3) of this C type folder has the screw thread (31,32) that is no less than two helixes.

3. C type folder as claimed in claim 1 is characterized in that: screw rod (3) afterbody of this C type folder is hexagonal prism (33), the clamping of instrument when being used to add long bolt (3) rotary arm.

4. C type folder as claimed in claim 1 is characterized in that: on the stiff end (5) of this C type folder vee-block (6) is installed; Bipod (61) activity of vee-block (6) freely, degree of tightness unanimity, no stuck phenomenon.

5. C type folder as claimed in claim 4, it is characterized in that: vee-block (6) makes base (62) be connected with pin (61) by mushroom rivet (63); Saddle type spring washer (65) in the middle of base (62) and pin (61), pin (61) can around rivet (63) rotate and and base (62) stagger.

6. C type folder as claimed in claim 5, it is characterized in that: the inwardly upset of two presser feets (61) of the vee-block (6) of this C type folder, rotate rotary handle bar (2), screw rod (3) drive activity presser feet (4), push workpiece (21,22), and the face of cylinder of workpiece (22) is pressed on two presser feets (61) of vee-block (6).

7. C type folder as claimed in claim 5, it is characterized in that: the outwards upset of two presser feets (61) of the vee-block (6) of this C type folder, rotate rotary handle bar (2), screw rod (3) drive activity presser feet (4), push workpiece (31,32), and the negative camber of workpiece (32) is pressed on two presser feets (61) of vee-block (6).

8. C type folder as claimed in claim 1 is characterized in that: on the stiff end (5) of this C type folder extending column (7) is installed; Extending column (7) one ends have screwed hole (72), and other screwed add ons are screwed in; The side processing annular knurl (73) of extending column (7).

9. C type folder as claimed in claim 8 is characterized in that: the extending column (7) of this C type folder strides across the flank of workpiece (42), enters in the groove of workpiece (42); Rotate rotary handle bar (2), screw rod (3) drive activity presser feet (4), pushing workpiece (41,42) is realized the leap of workpiece (42) is clamped.