CN205096905U - Work piece two -way positioning hold -down mechanism - Google Patents

Abstract

The utility model discloses a two-way positioning and pressing mechanism for a workpiece, which comprises: a mechanism housing; a linear motion driving mechanism arranged at one end of the mechanism housing, one end of the linear motion driving mechanism has a linear motion driving end; The connecting rod on the driving end, the two ends of each connecting rod are respectively provided with hinges, one end of each hinge is hinged on the connecting rod, and the other end is hinged with the bottom end of a compression arm, and the bottom end of the compression arm is also hinged. Hinged on the mechanism housing, the top of the pressing arm is provided with a pressing block; the positioning part is arranged on the connecting rod; when the linear motion driving end drives the connecting rod to move to the end far away from the linear motion driving mechanism, the positioning part and the straight line The moving driving end moves in the same direction, and the pressing arm turns over around its hinge with the mechanism housing, so that the positioning part and the pressing block can position and press the workpiece. The utility model has a compact and stable mechanism, is convenient to operate, reduces the manufacturing cost of the fixture, and reduces the labor intensity of workers.

Description

Workpiece two-way positioning and pressing mechanism

technical field

The utility model relates to the field of workpiece positioning and pressing mechanisms, in particular to a workpiece bidirectional positioning and pressing mechanism.

Background technique

At present, domestic tooling fixtures adopt a separate mechanism for workpiece positioning and workpiece compression, and they are all one-sided compression, and the positioning and compression are not synchronized, so that positioning a workpiece requires at least two cylinders and two independent positioning and positioning. For the pressing mechanism, when it comes to positioning a workpiece that needs to be pressed symmetrically, three cylinders are generally required, one cylinder is used to drive the positioning pin, and the other two cylinders are used to drive the symmetrical pressing mechanism, so the cost of positioning a workpiece It is relatively high and the mechanism is relatively large, which is not conducive to the utilization of the fixture space, and more cylinders are used, the cost of fixture manufacturing is high, and it is very inconvenient for workers to operate.

Utility model content

The purpose of the utility model is to provide a workpiece bidirectional positioning and pressing mechanism for the above-mentioned shortcomings and defects of the existing tooling fixture. The workpiece bidirectional positioning and pressing mechanism is simple in structure, easy to operate, and can realize positioning and pressing simultaneously. The above problems can be solved.

The technical problem solved by the utility model can be realized by adopting the following technical solutions:

The workpiece bidirectional positioning and pressing mechanism is characterized in that it includes:

Mechanism shell;

a linear motion drive mechanism arranged at one end of the mechanism housing, one end of the linear motion drive mechanism has a linear motion drive end;

At least one connecting rod fixed on the driving end of the linear motion, each connecting rod is provided with hinges at both ends, one end of each hinge is hinged on the connecting rod, and the other end is connected to the bottom of a pressing arm The end of the pressing arm is hinged, the bottom end of the pressing arm is also hinged on the mechanism housing, and the top end of the pressing arm is provided with a pressing block;

a positioning component arranged on the connecting rod;

When the linear motion driving end drives the connecting rod to move to an end far away from the linear motion driving mechanism, the positioning component moves in the same direction as the linear motion driving end, and the pressing arm is connected with the mechanism housing around it. The hinge of the hinge is overturned, so that the positioning part and the pressing block can position and compress the workpiece.

In a preferred embodiment of the present invention, there is one connecting rod, and the middle part of one connecting rod is fixed on the linear motion driving end.

In a preferred embodiment of the present invention, there are two connecting rods, and the two connecting rods are fixed on the linear motion driving end in a horizontal cross structure, and the linear motion driving end is connected to the center of the horizontal cross structure.

In a preferred embodiment of the present invention, the pressing arm and the pressing block are detachably connected by a bolt assembly.

In a preferred embodiment of the present invention, a spacer is provided between the pressing arm and the pressing block.

In a preferred embodiment of the present utility model, the linear motion drive mechanism includes a cylinder, and the piston rod of the cylinder is the drive end of the linear motion.

In a preferred embodiment of the present utility model, the positioning component includes:

a hollow guide rod, the hollow guide rod is fixed on the middle part of the connecting rod by a bolt that sequentially rotates through the bottom of the hollow guide rod, the connecting rod and the piston rod;

a positioning pin arranged on the top of the hollow guide rod;

A positioning block arranged on the connecting rod.

In a preferred embodiment of the present utility model, the end of the air cylinder away from the piston rod is provided with a manual driving part for driving the piston of the air cylinder to move.

In a preferred embodiment of the present invention, the manual driving part includes a pull rod connected with the piston of the air cylinder, and a handle is provided on the pull rod.

In a preferred embodiment of the present utility model, the housing of the mechanism is provided with a limit block that limits the radial movement of the workpiece.

Due to the adoption of the above technical scheme, the utility model conducts a series of force transmission through the movable connection between the parts, so that the utility model simultaneously has the functions of workpiece positioning and workpiece symmetrical pressing synchronization, mechanism retraction, and pressing block opening synchronization. Function; and this mechanism adopts a cylinder, the mechanism is small and stable, and the operation is convenient, which not only reduces the cost of fixture manufacturing, increases the utilization rate of fixture space, but also reduces the labor intensity of workers.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of an embodiment of the utility model.

FIG. 2 is a longitudinal sectional view of FIG. 1 .

detailed description

In order to make the technical means realized by the utility model, creation features, purpose and effect easy to be understood, the utility model is further elaborated below.

Referring to Fig. 1 and Fig. 2, a workpiece bidirectional positioning and pressing mechanism includes a mechanism housing 100, a linear motion driving mechanism 200 and at least one connecting rod 300, and there is only one connecting rod 300 in this embodiment.

The linear motion driving mechanism 200 includes a cylinder 210, and the piston rod 211a on the top of the piston 211 of the cylinder 210 is the linear motion driving end. The cylinder 210 is fixed at one end of the mechanism housing 100 , as shown in FIG. 2 , the cylinder 210 is fixed at the lower end of the mechanism housing 100 . The middle part of connecting rod 300 is fixed on the top of piston rod 211a, and the two ends of connecting rod 300 are respectively provided with hinge 400, and one end of each hinge 400 is hinged on connecting rod 300 by hinge shaft 410, and the other end is connected with a pressing arm. The bottom end of the compression arm 500 is hinged by the hinge shaft 420, and the bottom end of the compression arm 500 is also hinged on the support 110 of the mechanism housing 100 by the hinge shaft 530, so the bottom end of the compression arm 500 can be turned over with the hinge shaft 530 as the fulcrum .

The top of the compression arm 500 is provided with a compression block 510, and the compression arm 500 and the compression block 510 are detachably connected by a bolt assembly 520. In order to facilitate the adjustment of the height of the compression block 510, to adapt to different thicknesses of workpieces 1 For clamping, a spacer can be provided between the pressing arm 500 and the pressing block 510, and the thickness of the spacer can be selected according to the work requirement.

A positioning part 600 is also arranged on the middle part of the connecting rod 300 , the function of the positioning part 600 is to pre-fix the workpiece 1 , and the positioning part 600 and the pressing block 510 clamp the workpiece 1 together. The positioning part 600 in this embodiment comprises a hollow guide rod 610, a positioning block 620 and a positioning pin 630, and the hollow guide rod 610 is fixed on the connecting rod by a bolt 640 which is screwed through the bottom of the hollow guide rod, the connecting rod 300 and the piston rod 211a in turn. 300 Mid. The positioning pin 630 is inserted on the top of the hollow guide rod 610 , and the positioning block 620 is disposed on the connecting rod 300 and wraps around the hollow guide rod 610 . In order to prevent the radial movement of the workpiece 1 , in this embodiment, a limiting block 650 for limiting the radial movement of the workpiece 1 is provided on the mechanism housing 100 .

In order to make the utility model can be controlled automatically by electricity or by manual control, the end (i.e. the lower end in Fig. 2 ) of the cylinder 210 in this embodiment away from the piston rod 211a is provided with a manual drive part 220 that drives the movement of the piston 211 . The manual drive part 220 comprises a pull rod 221 connected with the piston bottom rod 211b of the cylinder 210, the pull rod 221 is provided with a handle 222, specifically, the bottom end of the handle 222 is hinged on the bottom end of the cylinder 210 through a hinge shaft 224, and the handle 222 The middle part is hinged on the pull rod 221 through the hinge shaft 223, and there is a certain gap between the handle 222 and the hinge shaft 223, so the handle 222 can be turned over with the hinge shaft 224 as the fulcrum, and the lever principle is used to drive the pull rod 221 to move, which is convenient and labor-saving .

The working principle of the utility model is as follows:

When the workpiece 1 needs to be clamped, the piston 211 of the cylinder 210 works, so that the piston rod 211a moves upwards, at this time the connecting rod 300 and the positioning part 600 move upwards, and the pressing arm 500 under the action of the hinge 400, the pressing arm 500 The bottom end of the hinge shaft 530 is used as a fulcrum to turn inwards, so that the pressing block 510 is pressed against the workpiece 1 , and the positioning component 600 and the pressing block 510 position and compress the workpiece 1 . Similarly, when the workpiece 1 needs to be loosened, the piston 211 of the cylinder 210 works, so that the piston rod 211a moves downward, at this time, the connecting rod 300 and the positioning part 600 move downward, and the pressing arm 500 is under the action of the hinge 400 , the bottom end of the pressing arm 500 turns outward with the hinge shaft 530 as the fulcrum, so that the pressing block 510 is away from the workpiece 1, and the positioning part 600 and the pressing block 510 loosen the positioning and pressing of the workpiece 1 at the same time.

This embodiment includes two modes of operation, pneumatic operation and manual operation. In pneumatic operation, the worker only needs to open the assembly when the mechanism is opened, and pick up the workpiece after welding is completed; for manual operation, the worker first manually opens the mechanism, installs the piece, and manually Push the manual driving part 220, and then manually compress it.

The utility model conducts a series of force transmission through the movable connection between the parts, so that the utility model has the functions of workpiece positioning and workpiece symmetrical pressing synchronization, mechanism retraction, and pressing block opening synchronization; and this mechanism adopts a cylinder , The mechanism is small and stable, and the operation is convenient, which not only reduces the manufacturing cost of the fixture, but also increases the utilization rate of the fixture space, and at the same time reduces the labor intensity of the workers.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model There will be various changes and improvements in the new model, for example, there are two connecting rods 300, and the two connecting rods 300 are fixed on the linear motion driving end in a horizontal cross structure, and the linear motion driving end is connected to the center of the horizontal cross structure. Forming four compression block compression structures in the circumferential direction, these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. the two-way positioning compression mechanism of workpiece, is characterized in that, comprising:

Mechanism shell;

Be arranged on the straight line movement driving mechanism of described mechanism shell one end, one end of described straight line movement driving mechanism has rectilinear motion drive end;

At least one connecting rod be fixed on described rectilinear motion drive end, the two ends of each connecting rod are respectively arranged with hinge, one end of each hinge is hinged on described connecting rod, the bottom of the other end and a clamping arm is hinged, the bottom of described clamping arm is also hinged on described mechanism shell, and the top of described clamping arm is provided with compact heap;

Be arranged on the positioning element on described connecting rod;

When described rectilinear motion drive end drives connecting rod to an end motion away from described straight line movement driving mechanism, described positioning element and described rectilinear motion drive end move in the same way, and described clamping arm overturns around the hinged place of itself and mechanism shell, makes positioning element and described compact heap position workpiece and compress.

2. the two-way positioning compression mechanism of workpiece as claimed in claim 1, it is characterized in that, described connecting rod is one, and the middle part of a connecting rod is fixed on described rectilinear motion drive end.

3. the two-way positioning compression mechanism of workpiece as claimed in claim 1, it is characterized in that, described connecting rod is two, and two connecting rods are that planche cross shelf structure is fixed on described rectilinear motion drive end, and described rectilinear motion drive end is connected to planche cross shelf structure center.

4. the two-way positioning compression mechanism of workpiece as claimed in claim 1, be is characterized in that, removably connected between described clamping arm and described compact heap by bolt assembly.

5. the two-way positioning compression mechanism of workpiece as claimed in claim 4, is characterized in that, be provided with cushion block between described clamping arm and described compact heap.

6. the two-way positioning compression mechanism of workpiece as claimed in claim 1, it is characterized in that, described straight line movement driving mechanism comprises cylinder, and the piston rod of described cylinder is described rectilinear motion drive end.

7. the two-way positioning compression mechanism of workpiece as claimed in claim 1, it is characterized in that, described positioning element comprises:

Hollow guide post, described hollow guide post by one being threaded through bottom hollow guide post successively, connecting rod and piston rod be bolted in the middle part of described connecting rod;

Be arranged on the alignment pin at described hollow guide post top;

Be arranged on the locating piece on described connecting rod.

8. the two-way positioning compression mechanism of workpiece as claimed in claim 6, is characterized in that, described cylinder is provided with the manual driving member of the piston movement driving described cylinder away from one end of described piston rod.

9. the two-way positioning compression mechanism of workpiece as claimed in claim 8, it is characterized in that, described manual driving member comprises the pull bar be connected with the piston of described cylinder, and described pull bar is provided with handle.

10. the two-way positioning compression mechanism of workpiece as claimed in claim 1, is characterized in that, described mechanism shell is provided with the limited block that restriction workpiece moves radially.