CN203509608U - Multifunctional clamp - Google Patents

Abstract

The utility model discloses a multifunctional fixture, which is specially used for processing the shift fork of the headstock of a C6140 lathe, and comprises a positioning mechanism, a clamping mechanism and a guiding mechanism. The positioning nails of the positioning mechanism are installed by setting holes on the clamp body, and can be installed and disassembled at any time. Therefore, positioning nails of different specifications can be selected according to the processing stage, so that a set of fixtures can be applied to different processing stages, reducing the number of sets of clamp bodies. . The clamping mechanism adopts an adjustable support screw nut, which improves the stability of clamping. When the guide sleeve of the guide mechanism is disassembled, the bolt is ejected, which is convenient for disassembly and improves the service life of the drill sleeve.

Description

Multifunctional Fixture

technical field

The utility model relates to the technical field of mechanical processing, in particular to a fixture specially used for processing a shift fork of a head box of a C6140 lathe.

Background technique

The processing of the workpiece requires fixtures to assist in positioning, and the processing of the headbox fork of the C6140 lathe is no exception. The structure of the headbox fork 1 of the C6140 lathe is shown in Figure 1. But, the existing fixture of C6140 lathe headstock shift fork has following defectives:

1. Positioning defect: At present, when processing the fork of the headstock of the C6140 lathe, the positioning elements of the fixture used are all fixed on the fixture body, and cannot be moved, adjusted, or replaced. However, due to the different machining allowances at each stage (rough machining or finishing machining, etc.) in the machining process, the positioning of the machined parts on the clamp body will also be different. Therefore, a fixture with one specification of positioning elements can only satisfy one processing stage: either roughing or finishing. This requires a set of fixtures to be used in conjunction with positioning elements corresponding to each processing stage, which increases the cost.

2. Defects of the clamping mechanism: the clamping mechanism 4' of the existing fixture of the shift fork is shown in Figure 2, which mainly includes a compression lever 41', a compression screw nut group 42', a compression nut 43', a balance The screw nut group 44' and the supporting rod 45', the workpiece is clamped between the pressing lever 41' and the supporting rod 45'. However, the existing clamps are not adjustable because the support rod 45' is fixed and supported by a fixed structure, so the clamping stability is not high.

3. Defects of the guide mechanism: When drilling the hole 11 of the shift fork 1, the common guide sleeve is generally used to position the tool at present, and the guide sleeve of the existing fixture is an interference fit with the drilling template, so when disassembling the guide sleeve, generally use Dismantling by knocking can easily cause damage to the guide sleeve and shorten the service life of the guide sleeve.

Utility model content

The technical problem to be solved by the utility model is to provide a multifunctional fixture that can replace positioning elements of different specifications, so that a set of fixtures can be applied to multiple processing stages.

Another technical problem to be solved by the utility model is to provide a multifunctional clamp, the support of the clamping mechanism is an adjustable support to improve the clamping stability.

Yet another technical problem to be solved by the utility model is to provide a multi-functional clamp with convenient disassembly of the guide sleeve.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A multifunctional fixture, including a clamp body, a positioning mechanism, a clamping mechanism and a guide mechanism; the clamp body is composed of a bottom plate and two vertical plates rigidly connected to the bottom plate, and the two vertical plates are also connected to each other Vertical, and define the direction perpendicular to the bottom plate as the Z direction, and the directions perpendicular to the two vertical plates as the X direction and the Y direction; there is an X-directed hole on the vertical plate perpendicular to the X direction, and a hole on the other vertical plate. There are two Y-direction holes; the positioning mechanism includes a Z-direction positioning plate, an X-direction positioning nail and two Y-direction positioning nails, the Z-direction positioning plate is fixed on the bottom plate, and the X-direction positioning nail is inserted connected to the X-direction hole, and the Y-direction positioning nail is inserted into the Y-direction hole.

The clamping mechanism includes a compression lever, a compression screw nut group, a compression nut, a balance screw nut group and an adjustable support screw nut group, and the adjustable support screw nut group, the compression screw nut group and the balance screw nut group The groups are sequentially and in-line helically fixed on the corresponding threaded holes on the bottom plate of the clamp body, the compression lever is sleeved on the compression screw nut group, and the compression nut is screwed on the compression screw nut. on the screw.

A spring is sheathed on the screw rod of the compression screw nut group, and the spring is located below the compression lever.

The guide mechanism includes a drill template and a guide sleeve, the drill template is fixed on the top of one of the vertical plates of the clamp body, and a guide hole is provided on it, and the guide sleeve is sleeved in the guide hole, and the two are interference Cooperate; the upper edge of the guide sleeve is provided with a boss, and the boss is provided with at least two threaded holes.

After adopting the above scheme, the utility model has the following advantages:

1. Since holes for installing positioning nails are designed on the clamp body, the positioning nails can be installed or disassembled at any time. Therefore, during the processing, positioning nails of different specifications can be selected and installed on the clamp body according to the difference in machining allowance. , so that a set of fixtures can be adapted to two processing stages of rough machining and finishing, reducing the number of sets of fixtures and reducing the cost;

2. The support end and the balance end of the clamping mechanism both adopt the height-adjustable structure of the screw nut group, and the adjustable support improves the stability of the clamping, and the adjustable balance end balances the clamping force and prevents the displacement of the workpiece and deformation effects;

3. A boss is set on the guide sleeve of the guide mechanism, and at least two threaded holes are set on the boss, so that when dismounting, the bolt can be used to withstand the drilling template, and the guide sleeve can be ejected and disassembled; It is convenient, fast, and does not damage the guide sleeve, and can prolong the service life of the guide sleeve.

Description of drawings

Fig. 1 is a structural schematic diagram of a C6140 lathe bedside box shift fork;

Fig. 2 is a structural schematic diagram of the clamping mechanism of the existing fixture of the shift fork;

Fig. 3 is a three-dimensional diagram of the general assembly of the utility model;

Fig. 4 is the general assembly schematic diagram of the present utility model;

Fig. 5 is a top view of the general assembly of the utility model;

Fig. 6 is A-A sectional view of Fig. 5;

Fig. 7 is a three-dimensional view of the clip body described in the present invention;

Fig. 8 is a three-dimensional diagram of the positioning mechanism described in the present invention;

Fig. 9 is a schematic diagram of the positioning mechanism of the present invention installed on the clamp body;

Fig. 10 is a schematic diagram of the clamping mechanism of the present invention installed on the clamp body;

Fig. 11 is a schematic view of the guide mechanism of the present invention installed on the clamp body.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

What the utility model discloses is a kind of multifunctional fixture, and this fixture is specially used in the processing of C6140 lathe head box shift fork 1 (shown in Fig. 1), as shown in Fig. 3 to Fig. 6, is the utility model comparatively good example. The clamp includes a clamp body 2 , a positioning mechanism 3 , a clamping mechanism 4 and a guiding mechanism 5 . in:

Simultaneously as shown in FIG. 7 , the clamp body 2 is composed of a base plate 21 and two vertical plates 22 that are vertically and rigidly connected to the base plate 21. The direction of the vertical plate 22 is the Z direction, and the directions perpendicular to the two vertical plates 22 are the X direction and the Y direction. One X-direction hole 23 is opened on the vertical plate 22 perpendicular to the X-direction, and two Y-direction holes 24 are opened on the other vertical plate 22 . The bottom plate 21 is provided with a boss 25 for placing the Z-direction positioning plate 31 described later. The boss 25 is provided with a chip removal hole 26 and two countersunk threaded holes 27. The countersunk threaded holes 27 are used for The Z-direction positioning plate 31 is positioned and installed, and the chip discharge hole 26 is used for discharging processing iron chips when drilling. The bottom plate 21 is also provided with three threaded holes 28 for installing three screw nut groups of the subsequent clamping mechanism 4 .

As shown in FIG. 8 and FIG. 9 , the positioning mechanism 3 includes a Z-direction positioning plate 31 , an X-direction positioning nail 32 and two Y-direction positioning nails 33 . The Z-direction positioning plate 31 is fixed on the boss 25 of the bottom plate 21 of the clamp body 2 by screws. The X-direction positioning nail 32 is inserted into the X-direction hole 23 of the clamp body 2 , and the Y-direction positioning nail 33 is inserted into the Y-direction hole 24 of the clamp body 2 . The Z-direction positioning plate 31 limits the movement of the shift fork in the Z direction; the X-direction positioning pin 32 limits the movement of the shift fork in the X direction and the rotation around the Y-axis; the two Y-direction positioning pins 33 limit the shifting The movement of the fork in the Y direction, the rotation around the X axis and the rotation around the Z axis; in this way, the set of positioning mechanisms 3 limits the 6 degrees of freedom of the shift fork, which meets the positioning requirements during processing. Since the positioning nails 32 and 33 are all positioned on the fixture body 2 in a movable plug-in manner, positioning nails of different specifications can be replaced according to different processing stages such as rough and fine machining, so that only one set of fixtures is needed It can be applied to different processing stages, reducing the number of fixtures and reducing costs.

Cooperate with shown in Figure 10 simultaneously, described clamping mechanism 4 comprises compression lever 41, compression screw nut group 42, compression nut 43, balance screw nut group 44 and adjustable support screw nut group 45, described can Adjust the support screw nut group 45, the compression screw nut group 42 and the balance screw nut group 44 sequentially and in a straight line and screw on the corresponding threaded hole 28 on the bottom plate 21 of the clamp body 2, and rotate the corresponding nut, and The height of the matched screw rod can be adjusted up and down relatively. The compression lever 41 is sleeved on the compression screw nut group 42 , and the compression nut 43 is screwed on the screw rod of the compression screw nut 42 . During use, the workpiece is placed on the fixture and positioned, then the nuts of the adjustable support screw nut group 45 are adjusted to make the screw support end contact with the workpiece, and then the nuts of the balance screw nut group 44 are adjusted so that the top of the screw rod is in contact with the workpiece. Pressed point equal height, then tighten the compression nut 43 in the middle so that the workpiece is clamped between the compression lever 41 and the adjustable support nut nut group 45, so that the clamping of the workpiece can be realized. Since the supporting end of the clamping mechanism adopts a height-adjustable screw nut structure, it can be adjusted according to the height of the workpiece, so the clamping stability can be improved. The balance end at the other end also adopts a height-adjustable structure, which can balance the clamping force and prevent workpiece displacement and deformation. In addition, a spring 46 can also be sleeved on the screw of the compression screw nut set 42 , and the spring 46 is located below the compression lever 41 . During the effect of this spring 46, when dismounting the workpiece, the spring can bounce the compression lever 41 to facilitate the dismounting of the workpiece.

At the same time, as shown in FIG. 11, the guide mechanism 5 includes a drill template 51 and a guide sleeve 52. The drill template 51 is fixed on the top of one of the vertical plates 22 of the clamp body 2, and a guide hole 53 is provided on it. The guide hole 53 is located above the hole 11 of the shift fork 1 , the guide sleeve 52 is sleeved in the guide hole 53 , and the two are interference fit. The upper edge of the guide sleeve 52 is provided with a boss 54 , and at least two threaded holes 55 are arranged on the boss 54 . When dismounting the guide sleeve, you can use the long bolts matched with the threaded holes 55 to be screwed in the two threaded holes 55. When the bolts are screwed to the bottom, continue to tighten the bolts, and the bolts will withstand the drill template 51, so that the guide Set 52 ejected.

The above are only preferred embodiments of the present utility model, and are not intended to limit the technical scope of the present utility model. Therefore, any changes or modifications made according to the claims of the utility model and the specification should belong to the utility model. Within the scope covered by the utility model patent.

Claims (4)

1. A multifunctional fixture, comprising a clamp body, a positioning mechanism, a clamping mechanism and a guide mechanism; it is characterized in that: the clamp body is composed of a base plate and two vertical and rigidly connected vertical plates on the base plate, The two vertical plates are also perpendicular to each other, and the direction perpendicular to the bottom plate is defined as the Z direction, and the directions perpendicular to the two vertical plates are respectively the X direction and the Y direction; there is an X-directed hole on the vertical plate perpendicular to the X direction. There are two Y-direction holes on the other vertical plate; the positioning mechanism includes a Z-direction positioning plate, an X-direction positioning nail and two Y-direction positioning nails, and the Z-direction positioning plate is fixed on the bottom plate. The X-direction positioning nail is inserted into the X-direction hole, and the Y-direction positioning nail is inserted into the Y-direction hole. 2. The multifunctional clamp according to claim 1, characterized in that: the clamping mechanism comprises a compression lever, a compression screw nut group, a compression nut, a balance screw nut group and an adjustable support screw nut group, The adjustable support screw nut group, the compression screw nut group and the balance screw nut group are sequentially and in-line helically fixed on the corresponding threaded holes on the bottom plate of the clamp body, and the compression lever is sleeved on the compression screw On the nut set, the compression nut is screwed on the screw rod of the compression screw nut. 3 . The multifunctional clamp according to claim 2 , wherein a spring is sleeved on the screw of the compression screw nut set, and the spring is located below the compression lever. 4 . 4. The multi-functional fixture according to any one of claims 1-3, characterized in that: the guide mechanism includes a drill template and a guide sleeve, and the drill template is fixed on the top of one of the risers of the clamp body, which A guide hole is provided on the guide sleeve, and the guide sleeve is set in the guide hole, and the two are interference fit; the upper edge of the guide sleeve is provided with a boss, and the boss is provided with at least two threaded holes.

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