CN207548246U - A kind of workpiece clamping mechanism - Google Patents

Abstract

The utility model discloses a workpiece clamping mechanism, which comprises a base, a fixed table, a sliding table, and a four-link structure. The four-link structure includes a first link, a second link, a third link and a fourth link. rod, wherein one end of the first connecting rod and one end of the second connecting rod are hinged to the side of the sliding table, one end of the third connecting rod and one end of the fourth connecting rod are hinged to the side of the fixed table, and the first connecting rod The other end of the second connecting rod is hinged with the other end of the fourth connecting rod, the other end of the second connecting rod is hinged with the other end of the third connecting rod, and the end of the fourth connecting rod far away from the first connecting rod is connected with the first clamping part, One end of the third connecting rod far away from the second connecting rod is connected with a second clamping part, and the first clamping part and the second clamping part form a jaw that can be opened or closed; it can ensure that the clamping position of the workpiece is Clamping accuracy, small size and low cost.

Description

A workpiece clamping mechanism

technical field

The utility model relates to the technical field of automatic production equipment, in particular to a workpiece clamping mechanism.

Background technique

With the development of society, the gradual rise of labor costs, the rise of the automation industry, and the widespread use of automation equipment, it is irreplaceable. With the advent of Industry 5.0, the vigorous promotion of automation equipment, an important tool, can save a lot of manpower, material and financial resources for various industries, improve product quality, increase the output value of enterprises, and reduce environmental pollution and damage. , deeply supported and promoted by the state.

Automation equipment has extremely strict requirements on product positioning. If there are adverse factors such as unstable positioning accuracy and low positioning accuracy, the development of many automation equipment will be hindered. The workpiece clamping mechanism is also one of the automation equipment, which is used to clamp the product. The workpiece clamping mechanism in the prior art is similar to the internal clamping and positioning mechanism, which uses a motor module and a side cylinder to push and clamp. This mechanism usually has defects such as high cost, large volume, and inaccurate clamping.

Therefore, a new type of workpiece clamping mechanism is urgently needed to solve the above-mentioned existing problems.

Utility model content

The purpose of the utility model is to propose a workpiece clamping mechanism, which can ensure the clamping position and clamping accuracy of the workpiece, and has small volume and low cost.

For this purpose, the utility model adopts the following technical solutions:

A workpiece clamping mechanism comprising:

base,

a fixed platform, the fixed platform is fixedly arranged at one end of the base,

a sliding table, the sliding table is slidably arranged on the base and can slide in a direction approaching or away from the fixed table under the action of a driving device, and

Four-link structure, the four-link structure includes a first link, a second link, a third link and a fourth link, wherein one end of the first link is connected to the second link One end is hinged to the side of the sliding table, one end of the third connecting rod and one end of the fourth connecting rod are hinged to the side of the fixed table, the other end of the first connecting rod is connected to the The other end of the fourth connecting rod is hinged, the other end of the second connecting rod is hinged with the other end of the third connecting rod, and the end of the fourth connecting rod far away from the first connecting rod is connected with a first A clamping part, a second clamping part is connected to an end of the third connecting rod far away from the second connecting rod, and the first clamping part and the second clamping part form an openable or closable Jaws.

Preferably, a first rotating shaft is connected to the side of the sliding table, a first hole is opened at one end of the first connecting rod, a second hole is opened at one end of the second connecting rod, and the first rotating shaft is sequentially passing through the first hole and the second hole so that the first connecting rod and the second connecting rod are respectively rotatably connected to the first rotating shaft, and the second connecting rod is located on the sliding table and the first connecting rod.

Preferably, the other end of the first connecting rod is provided with a third hole, the other end of the fourth connecting rod is provided with a fourth hole, the third rotating shaft passes through the third hole, the fourth hole and The other end of the first connecting rod and the other end of the fourth connecting rod are respectively rotatably connected to the third rotating shaft, and the fourth connecting rod is located between the sliding table and the first connecting rod between.

Preferably, the other end of the second connecting rod is provided with a fifth hole, the other end of the third connecting rod is provided with a sixth hole, the second rotating shaft passes through the fifth hole, the sixth hole and The other end of the second connecting rod and the other end of the third connecting rod are respectively rotatably connected to the second rotating shaft, and the second connecting rod is located between the sliding table and the third connecting rod between.

Preferably, a fourth rotating shaft is connected to the side of the fixed table, a seventh hole is opened at one end of the third connecting rod, an eighth hole is opened at one end of the fourth connecting rod, and the fourth rotating shaft is sequentially passing through the eighth hole and the seventh hole so that one end of the fourth connecting rod and one end of the third connecting rod are respectively rotatably connected to the fourth rotating shaft, and the fourth connecting rod is located at Between the fixed platform and the third connecting rod.

Preferably, the first clamping parts and the second clamping parts are arranged alternately.

Preferably, the first clamping portion is integrally formed with the fourth connecting rod, the second clamping portion is integrally formed with the third connecting rod, and the first clamping portion is integrally formed with the second connecting rod. The four connecting rods, the second clamping portion and the third connecting rod respectively form an obtuse angle structure, and the included angle of the obtuse angle structure is 110°-140°.

Preferably, buffer pads are provided on the clamping surfaces of the first clamping part and the second clamping part.

Preferably, a slide rail is fixedly arranged on the base, a slider is slidably arranged on the slide rail, and the sliding platform is fixedly arranged on the top of the slider and can follow the slider along the slide rail slide.

Preferably, the driving device is an air cylinder, and a cylinder rod of the air cylinder is connected to the slide table.

The beneficial effect of the utility model is: the workpiece clamping mechanism drives the first clamping part and the second clamping part to form a scissors-shaped clamping mouth through the four-link structure connected between the sliding table and the fixed table, and the workpiece is clamped During the whole working process, the gripping degree of the jaw is driven by the driving device to drive the slide of the sliding table to control the swing range between the adjacent connecting rods of the four-bar linkage structure, thereby controlling the opening and closing of the jaw , which has a simple structure, small size, good stability, and can ensure the clamping position and clamping accuracy of the workpiece.

Description of drawings

Fig. 1 is a structural schematic diagram 1 of the workpiece clamping mechanism provided by Embodiment 1 of the present utility model;

Fig. 2 is the second structural schematic diagram of the workpiece clamping mechanism provided in Embodiment 1 of the present utility model.

In the figure: 1-base; 2-slide rail; 3-slider; 4-sliding table; 5-first rotating shaft; 6-first connecting rod; 7-second connecting rod; 8-second rotating shaft; 9- 10-third connecting rod; 11-fourth connecting rod; 12-fixed platform; 13-fourth rotating shaft; 14-first clamping part; 15-second clamping part.

Detailed ways

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

As shown in Figures 1 to 2, the workpiece clamping mechanism of the present invention includes a base 1, a fixed table 12, a sliding table 4, and a four-link structure.

The fixed table 12 is fixedly arranged on one end of the base 1, and the sliding table 4 is slidably arranged on the base 1 and can slide along a direction approaching or away from the fixed table 12 under the action of a driving device. .

The four-bar linkage structure includes a first connecting rod 6, a second connecting rod 7, a third connecting rod 10 and a fourth connecting rod 11, wherein one end of the first connecting rod 6 is connected to the second connecting rod 7 One end of one end is hinged on the side of the sliding table 4, one end of the third connecting rod 10 and one end of the fourth connecting rod 11 are hinged on the side of the fixed table 12, and the first connecting rod 6 The other end of the second connecting rod 7 is hinged with the other end of the fourth connecting rod 11, the other end of the second connecting rod 7 is hinged with the other end of the third connecting rod 10, and the fourth connecting rod 11 is far away from the One end of the first connecting rod 6 is connected with a first clamping portion 14, and one end of the third connecting rod 10 away from the second connecting rod 7 is connected with a second clamping portion 15, and the first clamping portion 14 and the second clamping portion 15 form a jaw that can be opened or closed.

The workpiece clamping mechanism drives the first clamping part 14 and the second clamping part 15 to form a scissors-shaped jaw through the four-link structure connected between the sliding table 4 and the fixed table 12, and the workpiece is clamped in the jaw In the whole working process, the clamping degree of the jaws is driven by the driving device to drive the slide of the sliding table 4 to control the swing range between the adjacent connecting rods of the four-bar linkage structure, thereby controlling the opening and closing of the jaws. Its structure Simple, small in size and good in stability, it can ensure the clamping position and clamping accuracy of the workpiece.

Wherein, the four-bar linkage structure is located at the same side of the sliding table 4 and the fixed table 12 .

Preferably, the side of the slide table 4 is connected with a first rotating shaft 5, one end of the first connecting rod 6 is provided with a first hole, and one end of the second connecting rod 7 is provided with a second hole, the The first rotating shaft 5 passes through the first hole and the second hole in turn so that the first connecting rod 6 and the second connecting rod 7 are respectively rotatably connected to the first rotating shaft 5 , and the first connecting rod 5 The second connecting rod 7 is located between the sliding table 4 and the first connecting rod 6 .

Preferably, the other end of the first connecting rod 6 is provided with a third hole, the other end of the fourth connecting rod 11 is provided with a fourth hole, the third rotating shaft 9 passes through the third hole, the first Four holes allow the other end of the first connecting rod 6 and the other end of the fourth connecting rod 11 to be rotatably connected to the third rotating shaft 9 respectively, and the fourth connecting rod 11 is located on the sliding platform 4 and the first connecting rod 6.

Preferably, the other end of the second connecting rod 7 is provided with a fifth hole, the other end of the third connecting rod 10 is provided with a sixth hole, the second rotating shaft 8 passes through the fifth hole, the first Six holes allow the other end of the second connecting rod 7 and the other end of the third connecting rod 10 to be rotatably connected to the second rotating shaft 8 respectively, and the second connecting rod 7 is located on the sliding platform 4 and the third connecting rod 10.

Preferably, the side of the fixed table 12 is connected with a fourth rotating shaft 13, one end of the third connecting rod 10 is provided with a seventh hole, and one end of the fourth connecting rod 11 is provided with an eighth hole, the The fourth rotating shaft 13 passes through the eighth hole and the seventh hole in turn so that one end of the fourth connecting rod 11 and one end of the third connecting rod 10 are respectively rotatably connected to the fourth rotating shaft 13 , the fourth connecting rod 11 is located between the fixed platform 12 and the third connecting rod 10 .

Through the above-mentioned four-bar linkage structure, the first clamping portion 14 and the second clamping portion 15 of the present invention are arranged alternately. Preferably, the first clamping portion 14 is integrally formed with the fourth connecting rod 11, the second clamping portion 15 is integrally formed with the third connecting rod 10, and the first clamping portion 14 and the fourth connecting rod 11 , and the second clamping portion 15 and the third connecting rod 10 respectively form an obtuse angle structure, and the included angle of the obtuse angle structure is 110°-140°. For example, the obtuse angle is 110°, 115°, 120°, 125°, 130°, 135°, 140°, and in this embodiment, it is preferably 125°.

In order to facilitate the clamping of the workpiece and avoid damage to the workpiece, buffer pads are provided on the clamping surfaces of the first clamping part 14 and the second clamping part 15 of the present invention. For example, the clamping surface can be one side or both upper and lower surfaces (when the upper and lower positions of the first clamping part 14 and the second clamping part 15 are different, there will be different clamping surfaces for clamping the workpiece).

In this embodiment, the sliding table 4 is slidably arranged on the base 1, specifically, a slide rail 2 is fixedly arranged on the base 1, a slider 3 is slidably arranged on the slide rail 2, and the sliding table 4 is fixed It is arranged on the top of the slider 3 and can slide along the slide rail 2 following the slider 3 . The driving device is an air cylinder, and the cylinder rod of the air cylinder is connected to the slide table 4 .

When the cylinder rod of the cylinder pushes the sliding table 4 to slide towards the fixed table 12, since each connecting rod of the four-bar linkage structure is rotatably connected through the first rotating shaft 5, the second rotating shaft 8, the third rotating shaft 9, and the fourth rotating shaft 13, Therefore, the included angle between the first connecting rod 6 and the second connecting rod 7 and the fourth connecting rod 11 and the third connecting rod 10 can be gradually reduced, that is, the first connecting rod 6 is close to the fourth connecting rod 11, The second connecting rod 7 is close to the third connecting rod 10, thereby driving the angle between the fourth connecting rod 11 and the third connecting rod 10 to gradually increase, and finally driving the first clamping part 14 and the second clamping part 15 to form The included angle of the jaws gradually increases, and finally the purpose of opening the jaws is achieved, and the workpiece is released.

Conversely, when the cylinder rod of the cylinder pulls the sliding table 4 to slide away from the fixed table 12, each connecting rod of the four-bar linkage structure can rotate through the first rotating shaft 5, the second rotating shaft 8, the third rotating shaft 9, and the fourth rotating shaft 13 respectively. connection, so that the angle between the first link 6, the second link 7 and the fourth link 11, the third link 10 can be gradually increased, that is, the first link 6 and the fourth link 11 tends to be straight, and the second connecting rod 7 tends to be straight to the third connecting rod 10, thereby driving the angle between the fourth connecting rod 11 and the third connecting rod 10 to gradually decrease, and finally driving the first clamping part 14 and the second clamping part 15 formed by the jaw gradually reduce the angle, and finally achieve the purpose of jaw closing, clamping the workpiece.

Of course, in order to avoid damage to the workpiece caused by too tight clamping between the first clamping part 14 and the second clamping part 15, it is necessary to control the movement stroke of the cylinder pulling the sliding table 4 away from the fixed table 12. The fixed table 12 of the present invention A linear sensor is also arranged between the slide table 4, which can accurately monitor the movement stroke, and feed back to the controller of the cylinder in real time, and the controller controls the movement of the cylinder.

It can be seen that the workpiece clamping mechanism of the utility model has the advantages of simple structure, convenient operation, high clamping precision and strong controllability, which helps to ensure the clamping position and clamping precision of the workpiece.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (10)

1. a kind of workpiece clamping mechanism, which is characterized in that including：

Pedestal (1),

Fixed station (12), the fixed station (12) are fixedly installed on the one end of the pedestal (1),

Sliding stand (4), the sliding stand (4) be slideably positioned on the pedestal (1) and can under the action of driving device edge Closer or far from the fixed station (12) direction slide and

Four-bar linkage structure, the four-bar linkage structure include first connecting rod (6), second connecting rod (7), third connecting rod (10) and the 4th company Bar (11), wherein, one end of the first connecting rod (6) is articulated with the sliding stand (4) with one end of the second connecting rod (7) Side, one end of the third connecting rod (10) are articulated with the side of the fixed station (12) with one end of the fourth link (11) Portion, the other end and the other end of the fourth link (11) of the first connecting rod (6) are hinged, the second connecting rod (7) it is another The other end of one end and the third connecting rod (10) is hinged, one far from the first connecting rod (6) of the fourth link (11) End is connected with the first clamping part (14), and one end far from the second connecting rod (7) of the third connecting rod (10) is connected with second Clamping part (15), first clamping part (14) form the clamping opening that can be opened or be closed with second clamping part (15).

2. workpiece clamping mechanism according to claim 1, which is characterized in that the side of the sliding stand (4) is connected with One shaft (5), one end of the first connecting rod (6) offer the first hole, and one end of the second connecting rod (7) offers second Hole, the first rotating shaft (5) sequentially pass through first hole, second hole so that the first connecting rod (6), second company Bar (7) is rotatably connected respectively with the first rotating shaft (5), and the second connecting rod (7) is positioned at the sliding stand (4) and described the Between one connecting rod (6).

3. workpiece clamping mechanism according to claim 1, which is characterized in that the other end of the first connecting rod (6) opens up There is a third hole, the other end of the fourth link (11) offers the 4th hole, and third shaft (9) is across the third hole, described 4th hole so that the other end of the first connecting rod (6), the fourth link (11) the other end respectively with the third shaft (9) it is rotatably connected, the fourth link (11) is between the sliding stand (4) and the first connecting rod (6).

4. workpiece clamping mechanism according to claim 1, which is characterized in that the other end of the second connecting rod (7) opens up There is the 5th hole, the other end of the third connecting rod (10) offers the 6th hole, and the second shaft (8) is across the 5th hole, described 6th hole so that the other end of the second connecting rod (7), the third connecting rod (10) the other end respectively with second shaft (8) it is rotatably connected, the second connecting rod (7) is between the sliding stand (4) and the third connecting rod (10).

5. workpiece clamping mechanism according to claim 1, which is characterized in that the side of the fixed station (12) is connected with Four shafts (13), one end of the third connecting rod (10) offer seven apertures in the human head, and one end of the fourth link (11) offers Octal, the 4th shaft (13) sequentially pass through the octal, the seven apertures in the human head so that one end of the fourth link (11), One end of the third connecting rod (10) is rotatably connected respectively with the 4th shaft (13), and the fourth link (11) is positioned at institute It states between fixed station (12) and the third connecting rod (10).

6. workpiece clamping mechanism according to claim 1, which is characterized in that first clamping part (14) and described second Clamping part (15) is is staggered.

7. workpiece clamping mechanism according to claim 1, which is characterized in that first clamping part (14) and the described 4th Connecting rod (11) integral molding, second clamping part (15) and the third connecting rod (10) integral molding, first folder It holds portion (14) and is respectively formed obtuse angle knot with the fourth link (11), second clamping part (15) and the third connecting rod (10) Structure, the angle of the obtuse angle structure is 110 °~140 °.

8. workpiece clamping mechanism according to claim 1, which is characterized in that first clamping part (14) and described second The clamping face of clamping part (15) is both provided with cushion pad.

9. workpiece clamping mechanism according to claim 1, which is characterized in that be fixedly installed sliding rail on the pedestal (1) (2), it is slided on the sliding rail (2) and is provided with sliding block (3), the sliding stand (4) is fixedly installed on the top of the sliding block (3) simultaneously The sliding block (3) can be followed to be slided along the sliding rail (2).

10. workpiece clamping mechanism according to claim 1, which is characterized in that the driving device be cylinder, the cylinder Cylinder rod connect the sliding stand (4).