CN101648344B - Eccentric wheel clamping device - Google Patents

Abstract

The invention relates to an eccentric wheel clamping device, which comprises a clamp body, a supporting seat, a pressing plate, a base plate, a handle, an eccentric wheel and the like, wherein a pressing pillar and an annular screw are respectively arranged at the upper part and the lower part of the front end of the supporting seat, the other end of the annular screw is hinged with the pressing plate with a groove at the lower part through a hinge pin, a long hole is formed in the middle of the pressing plate and is movably matched with the pressing pillar, a pull rod is connected with the lower part of the pressing plate and is connected with the supporting seat through a spring, the pressing pillar penetrates through the long hole in the pressing plate and is hinged with the eccentric wheel with the groove through a pin shaft, the eccentric wheel is pressed on the outer side of the pressing plate, the pressing plate. The crankshaft clamping device is reasonable in structure, convenient to assemble and high in universality, is arranged at a required position according to the sizes of parts of different crankshafts, and is suitable for clamping various crankshaft parts.

Description

An eccentric wheel clamping device

technical field

The invention relates to a clamping device, in particular to an eccentric wheel clamping device.

Background technique

We know that in the production and manufacture of crankshafts, some manufacturing processes must clamp the crankshaft for processing operations. For example, to drill oil holes for crankshaft main journal and connecting rod journal, the processing needs to be completed in two processes with a set of drilling jigs respectively on two radial drilling machines. One process drills the straight oil hole of the main shaft, and the other process drills the straight oil hole of the connecting rod. Because each crankshaft has different oil hole angles, crankshaft main shaft and connecting rod diameter requirements, this requires two sets of fixtures for each crankshaft. In addition to poor versatility , It also causes high manufacturing cost of the fixture, long production cycle, many clamping times, and low efficiency.

At present, when using a radial drilling machine to drill an oil hole jig on the journal of a crankshaft, the clamping mechanism of the screw and the pressure plate is more widely used. In the design of clamping mechanism, eccentric wheel or screw clamping mechanism is a kind of clamping mechanism that is widely used. The eccentric wheel clamping mechanism is easy to process and operate, and clamps quickly. The disadvantage is that the clamping force and clamping stroke are small. The screw clamping mechanism has simple structure, reliable clamping and good versatility. Moreover, due to the small helix angle, the self-locking performance of the screw clamping mechanism is good, and the clamping force and clamping stroke are relatively large. The disadvantage is manual clamping. Tight action is slow and labor-intensive.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide an eccentric wheel with reasonable structure, convenient assembly, simple manufacture, large clamping stroke, high efficiency, low labor intensity, and suitable for clamping various shafts. clamping device.

The technical solution adopted by the present invention to solve the above technical problems is: an eccentric wheel clamping device, which includes a clamp body, a support seat, a pressure plate, a backing plate, a handle, and an eccentric wheel. The support seat is installed on the clamp body, and the backing plate is horizontally It is installed on the support seat in the vertical direction, and it is characterized in that a compression pillar and a ring screw are respectively installed on the front end of the support seat. The hole is movably matched with the compression pillar, the lower part of the pressure plate is connected with a pull rod, the lower end of the pull rod is connected with a spring, the other end of the spring is connected with the lug bolt on the support seat, and the compression pillar passes through the elongated hole provided on the pressure plate with a pin It is hinged with the eccentric wheel with a slot, and the eccentric wheel with a handle is pressed against the outside of the pressure plate. By rotating the eccentric wheel supported by the compression pillar, the eccentric action of the eccentric wheel is used to press and push the pressure plate, and the pressure plate is supported around the ring screw. The hinge pin turns and the upper part compresses or loosens the part.

The said compression strut of the present invention is installed in the threaded hole of the support seat through the screw thread provided at one end, and a positioning nut is also provided on the outside. The other end of the compression pillar passes through the long hole on the pressure plate and is hinged with the eccentric wheel with a slot. Press plate, through which the part is pressed. The threaded part of the said compression pillar can be screwed into the nut and then screwed into the support base, and the range adjustment of the compression mechanism can be realized through the positioning of the nut, thereby compressing different parts sizes.

The annular screw mentioned in the present invention is installed in the threaded hole of the supporting base, and a positioning nut is also provided outside the annular screw, and the two are screwed together to adjust the extension length of the positioning annular screw, so as to be suitable for the clamping plate of different diameters. Component.

The invention adopts the eccentric wheel to control the rotation of the pressing plate, utilizes the eccentric effect of the eccentric wheel to press and push the pressing plate, the pressing plate rotates around the hinge pin supported by the ring screw, and the upper part is pressed or loosened. Compared with the prior art, the present invention has reasonable structure, convenient assembly, low manufacturing cost and strong versatility. It installs the clamping device at the required position according to the parts size of different crankshafts, and is suitable for clamping various crankshaft parts.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic view of the present invention for the clamping state of the straight oil hole of the crankshaft drill.

Fig. 2 is a schematic diagram of the structure of the original state before clamping of the present invention.

Among the figure 1. handle, 2. eccentric wheel, 3. bearing pin, 4. pressing plate, 5. pull rod, 6. hinge pin, 7. nut, 8. ring screw, 9. bearing seat, 10. spring, 11. Lug bolts, 12. Clamp body, 13. Positioning column, 14. Drill template, 15. Drill sleeve, 16. Backing plate, 17. Compression pillar.

Detailed ways

It can be seen from Figure 1 and Figure 2 that an eccentric wheel clamping device includes a handle 1, an eccentric wheel 2, a pin shaft 3, a pressure plate 4, a pull rod 5, a hinge pin 6, a nut 7, a ring screw 8, a support Seat 9, spring 10, lug bolt 11, clip body 12, backing plate 16, compression pillar 17, etc. The support base 9 is installed on the clamp body 12, and the backing plate is installed on the support base in the horizontal and vertical directions. When being used for crankshaft drilling straight oil hole clamping, also be provided with connecting rod positioning column 13, drilling template 14, drill bushing 15 etc., wherein drilling template 14 and positioning column 13 are also installed on the clamping body 12. The drill sleeve 15 is installed on the drill template 14 .

The present invention is characterized in that: a compression strut 17 and a ring screw 8 are respectively installed up and down at the front end of the support seat 9 . The other end of the ring screw 8 is hinged with the hinge pin 6 and the grooved pressing plate 4 at the bottom. The middle part of the pressing plate 4 is provided with an elongated hole to cooperate with the compression pillar 17. Spring 10, the other end of spring 10 links to each other with lug bolt 11 on the support seat 9, and spring 10 makes pressing plate 4 stressed and is in open position all the time, so that the loading and unloading of parts is convenient. The compression pillar 17 passes through the elongated hole provided on the pressure plate 4 and is hinged with the pin shaft 3 and the eccentric wheel 2 provided with a slot. The handle 1 is installed on the eccentric wheel, and the eccentric wheel 2 with the handle 1 presses against the pressure plate. 4. On the outside, by rotating the eccentric wheel 2 supported by the compression pillar 17, the eccentric action of the eccentric wheel 2 is used to press and push the pressing plate 4, and the pressing plate 4 rotates around the hinge pin 6 supported by the ring screw 8, and the upper part is pressed or loosened.

The said compression strut 17 of the present invention is installed in the threaded hole of the supporting seat 9 through the screw thread provided at one end, and a positioning nut 7 is also provided on the outside. The other end of the compression strut 17 passes through the elongated hole provided on the pressing plate 4 and is hinged with the pin shaft 3 and the eccentric wheel 2 provided with slotting, and the elongated hole on the pressing plate 4 and the slotting of the eccentric wheel 2 all play a guiding role , the eccentric wheel directly presses the pressure plate, and presses the parts through the pressure plate. The threaded portion of the said compression pillar 17 can be screwed into the nut 7 and then screwed into the support seat, and the nut 7 is positioned to realize the amplitude adjustment of the compression mechanism, thereby compressing different parts sizes.

The annular screw 8 mentioned in the present invention is installed in the threaded hole of the supporting seat 9, and a positioning nut 7 is also provided outside the annular screw 8, and the two are screwed in together to adjust the extension length of the positioning annular screw 8 to suit the pressing plate. Clamp parts of different diameters.

The present invention adopts the eccentric wheel 2 to control the rotation of the pressing plate 4, utilizes the eccentric effect of the eccentric wheel to compress and push the pressing plate, the pressing plate 4 rotates around the hinge pin 6 supported by the annular screw 8, and the upper part is pressed or loosened. The invention has the advantages of reasonable structure, convenient assembly, low manufacturing cost and strong versatility. It is installed at the required position according to the parts size of different crankshafts, and is suitable for clamping various crankshaft parts.

Application example of the present invention, taking a four-cylinder crankshaft as an example, a four-cylinder crankshaft has five main journals and four connecting rod journals, of which four main journals need to drill oil holes. When in use, use the above two sets of clamping mechanisms to clamp 1st and 5th main journals. First, the crankshaft is suspended on the backing plate 16 with the first and fifth main journals, and at the same time, the first connecting pin journal is circumferentially positioned on the positioning column 13, and then the handle 1 is moved counterclockwise, and the pressure plate 4 immediately presses the first and fifth main journals. The 5th main journal, drill sleeve 15 aligns with the oil hole position to be drilled simultaneously, just can drill four oil holes successively in order. Move the handle 1 clockwise, that is, loosen the pressure plate 4, the clamping mechanism is in the original state, and the parts can be removed.

Claims (3)

1. A kind of eccentric wheel clamping device, it comprises clamp body, support base, pressing plate, backing plate, handle, eccentric wheel, support base is installed on the clamp body, backing plate is installed on the support base by horizontal and vertical direction, its It is characterized in that a compression pillar and a ring screw are respectively installed on the front end of the support seat, and the other end of the ring screw is hinged with the lower grooved pressure plate with a hinge pin. Connect a pull rod, the lower end of the pull rod is connected with a spring, and the other end of the spring is connected with the lug bolt on the support seat, and the compression pillar passes through the elongated hole on the pressure plate and is hinged with the eccentric wheel with a slot. , the eccentric wheel with handle presses against the outside of the pressure plate, by rotating the eccentric wheel supported by the compression pillar, the eccentric action of the eccentric wheel is used to press and push the pressure plate, and the pressure plate rotates around the hinge pin supported by the ring screw, and the upper part is pressed or loosened open parts. 2. The eccentric wheel clamping device according to claim 1, characterized in that: the said pressing pillar is installed in the threaded hole of the supporting seat through the thread provided at one end, and a positioning nut is provided outside. 3. The eccentric wheel clamping device according to claim 1, characterized in that: said ring screw is installed in the threaded hole of the supporting seat, and a positioning nut is arranged outside the ring screw.

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