CN204324361U - Crank-type centering fixing device - Google Patents

Abstract

The utility model discloses a crank type centering clamping device, which comprises a frame and a cylinder. The frame includes a column and an upper beam. The upper beam is provided with two parallel linear guide rails, and the guide rail is provided with a left clamping claw matched with the guide rail. , the right clamping claw, the left clamping claw and the right clamping claw are respectively movable and clamped on the linear guide rail, the left clamping claw and the right clamping claw are symmetrically arranged along the transverse center plane of the frame, the left clamping claw and the One end of the left connecting rod is connected, the other end of the left connecting rod is hinged with one end of the rotating plate through the first connecting hole, the right clamping claw is connected with one end of the right connecting rod, the other end of the right connecting rod is connected with the other end of the rotating plate through the second The connecting hole is hinged, the end of the piston rod is hinged with one end of the crank, the other end of the crank is fixedly connected with the rotating plate through the rotating shaft, and the cylinder body of the cylinder is hinged with the frame. The utility model has the advantages of good flexibility, low noise, easy operation, good reliability and high work efficiency, reduces the labor intensity of the operator, and can realize centering clamping of workpieces with different shapes and sizes and symmetrical structures.

Description

Crank centering clamping device

technical field

The utility model relates to the technical field of mechanical manufacturing, in particular to a crank type centering clamping device.

Background technique

When the workpiece on the conveyor belt of the conveyor line enters the workbench of machine tool equipment such as assembly and processing, it is necessary to carry out symmetrical center positioning of the workpiece so that the center plane of the workpiece coincides with the center plane of the workbench of the machine tool equipment to meet the initial position of the workpiece by the equipment. positioning accuracy requirements.

For workpieces with different shapes and sizes and symmetrical structures, two-way symmetrical clamping is required to position the center of the workpiece at the same position. In the prior art, this type of design mostly uses structures such as bidirectional threads to achieve symmetrical clamping. Because the position of the clamping point of the jaws is uncertain when clamping workpieces of different sizes, the motor that drives the screw The clamping force is not easy to control, and some servo motors are used to drive the screw to accurately control the clamping force, but the cost is high. Therefore, the disadvantage of this structure is that the clamping force is not easy to control or the cost is high. Using an air motor to drive the screw The bars are noisy.

Utility model content

The purpose of this utility model is to provide a crank type centering clamping device to solve the above-mentioned problems existing in the prior art; The labor intensity of the operator can be realized, and the centering clamping of workpieces with different shapes and sizes and symmetrical structures can be realized.

The technical scheme that the utility model solves technical problem is:

A crank type centering clamping device, comprising a frame and a cylinder, the cylinder body of the cylinder is installed on the frame, the frame includes columns on both sides, and an upper beam connected with the column, and the upper beam is provided with Two parallel linear guide rails, the guide rails are equipped with left clamping claws and right clamping claws that cooperate with the guide rails, and the left clamping claws and right clamping claws are respectively movable and clamped on the linear guide rails. The clamping claws are arranged symmetrically along the transverse central plane of the frame, the left clamping claw is connected to one end of the left connecting rod, the other end of the left connecting rod is hinged to one end of the rotating plate through the first connecting hole, and the right clamping claw The claw is connected with one end of the right connecting rod, the other end of the right connecting rod is hinged with the other end of the rotating plate through the second connecting hole, the end of the piston rod of the cylinder is hinged with one end of the crank, and the other end of the crank is fixed with the rotating plate through the rotating shaft connected, the cylinder body of the cylinder is hinged with the frame.

The rotating plate is connected with the lower end of the rotating shaft, the crank is connected with the upper end of the rotating shaft, the lower end and the upper end of the rotating shaft are matched with the bearing inner ring respectively, the bearing outer ring is matched with the connecting sleeve, and the connecting sleeve is connected with the longitudinal beam of the frame.

The upper beam of the frame is provided with slots on both sides of the linear guide rail, and the lower ends of the left and right clamping claws protrude from the slots respectively to the lower plane of the upper beam.

The rotation center of the rotating plate is located at the midpoint of the line connecting the first connecting hole and the second connecting hole.

The lengths of the left connecting rod and the right connecting rod are equal.

The beneficial effects of the utility model:

1. The utility model has the advantages of simple structure, high reliability, convenient operation, high positioning and tightening precision, high work efficiency, and reduces the labor intensity of the operator.

2. The utility model adopts the cylinder with good clamping flexibility, high degree of automation, easy control, and low noise, which can meet the centering clamping of workpieces with a large size range.

3. The utility model adopts the cylinder with cheap energy, clean, low cost, easy maintenance and durable.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of the present utility model.

Fig. 2 is a schematic diagram of the front view structure of the utility model.

Fig. 3 is a schematic cross-sectional structure diagram of the utility model along the central plane of the crank.

Fig. 4 is a schematic diagram of an embodiment of the utility model.

In the figure: 1 frame, 2 linear guide rails, 3 left clamping jaws, 4 right clamping jaws, 5 left connecting rod, 6 right connecting rod, 7 rotating plate, 8 rotating shaft, 9 bearing, 10 crank, 11 cylinder, 12 Conveying line, 13 workpieces, 14 upper beam, 15 longitudinal beam, 16 first connection hole, 17 second connection hole, 18 connection sleeve.

detailed description

In order to better understand the utility model, the implementation of the utility model will be explained in detail below in conjunction with the accompanying drawings.

Combined with Figure 1 to Figure 4,

A crank type centering clamping device is used for clamping and centering a workpiece 13 on a conveying line 12, as shown in Figure 1, comprising a frame 1 and a cylinder 11, the cylinder body of which is installed on On the frame 1, the frame 1 is a door-type frame body, including columns on both sides, and an upper beam 14 connected with the columns. The upper beam is provided with two parallel linear guide rails 2, and the guide rail 2 is provided with a The matching left clamping claw 3 and right clamping claw 4 are respectively movable and clamped on the linear guide rail 2, and the left clamping claw 3 and the right clamping claw 4 are moved along the The transverse central plane of the frame is arranged symmetrically, the left clamping claw 3 is connected with one end of the left connecting rod 5, the other end of the left connecting rod 5 is hinged with the rotating plate 7 through the first connecting hole 16, and the right clamping Claw 4 is connected with one end of right connecting rod 6, and the other end of right connecting rod 6 is hinged with the other end of rotating plate 7 through second connection hole 17, as shown in Figure 3, the end of the piston rod of described cylinder 11 and crank One end of the crank 10 is hinged, the other end of the crank 10 is fixedly connected with the rotating plate 7 through the rotating shaft 8, and the cylinder body of the cylinder 11 is hinged with the frame 1.

The rotating plate 7 is connected to the lower end of the rotating shaft 8, the crank 10 is connected to the upper end of the rotating shaft 8, the lower end and the upper end of the rotating shaft 8 are matched with the inner ring of the bearing 9 respectively, the outer ring of the bearing 9 is matched with the connecting sleeve 18, and the connecting sleeve is connected with the machine. The longitudinal beam 15 of the frame is connected.

As shown in Figures 1, 2, and 4, the upper beam 14 of the frame 1 is provided with slots on both sides of the linear guide rail 2, and the lower ends of the left clamping claw 3 and the right clamping claw 4 protrude from the slots respectively. The lower plane of the upper beam 14.

The rotation center of the rotating plate 7 is located at the midpoint of the line connecting the first connecting hole and the second connecting hole.

Described left connecting rod 5, right connecting rod 6 lengths are equal.

As shown in Figure 4, the frame 1 is installed across the conveying line 12, and the distance between the two left clamping claws 3 and 4 is the largest when resetting. At this time, the piston rod of the cylinder 11 is fully retracted, and when the workpiece 13 When located in the area of the clamping claws on the conveying line 12, the cylinder 11 is controlled so that the piston rod stretches out to push the crank 10 to rotate, as shown in Figure 1, the crank 10 drives the rotating shaft 8 to rotate and then drives the rotating plate 7 to rotate, and the two left 1. The right connecting rod 5, 6 is pulled to move in the opposite direction, and then pulls the two left and right clamping jaws 3, 4 to slide relatively along the linear guide rail 2 to clamp the workpiece 13.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it is not a limitation to the scope of protection of the utility model. On the basis of the technical solution of the utility model, those skilled in the art can make Various modifications or deformations are still within the protection scope of the present utility model.

Claims (5)

1. a crank-type centering fixing device, it is characterized in that, comprise frame, cylinder, the cylinder body of described cylinder is arranged in frame, frame comprises the column of both sides, the entablatrance be connected with column, described entablatrance is provided with two parallel lines guide rails, guide rail is provided with the left clamp jaw coordinated with guide rail, right clamp jaw, left clamp jaw, right clamp jaw respectively active card is contained on line slideway, described left clamp jaw, right clamp jaw is arranged symmetrically with along the transverse center face of frame, described left clamp jaw is connected with one end of left connecting rod, it is hinged that the first connecting bore is passed through in the other end of left connecting rod and swivel mount one end, described right clamp jaw is connected with one end of right connecting rod, it is hinged that the other end of right connecting rod and the swivel mount other end pass through the second connecting bore, end and crank one end of the piston rod of described cylinder are hinged, the crank other end is fixedly connected with swivel mount by S. A., cylinder body and the frame of described cylinder are hinged.

2. crank-type centering fixing device as claimed in claim 1, it is characterized in that, described swivel mount is connected with S. A. lower end, crank is connected with S. A. upper end, lower end, the upper end of S. A. coordinate with bearing inner ring respectively, and outside race coordinates with adapter sleeve, and adapter sleeve is connected with the longeron of frame.

3. crank-type centering fixing device as claimed in claim 1, it is characterized in that, the entablatrance of described frame is provided with fluting in the both sides of line slideway, and the lower end of left clamp jaw, right clamp jaw stretches out the lower plane of entablatrance respectively from fluting.

4. crank-type centering fixing device as claimed in claim 1, it is characterized in that, the centre of gration of described swivel mount is positioned at the mid point of the first connecting bore, the second connecting bore line.

5. crank-type centering fixing device as claimed in claim 1, it is characterized in that, described left connecting rod, right connecting rod length are equal.