CN117140398A - Variable-spacing pneumatic flexible clamp - Google Patents

Abstract

The invention provides a variable-spacing pneumatic flexible clamp, which includes a placement platform, a clamping mechanism, and a variable-spacing mechanism. The placement plate on the top of the placement platform is used to place the workpiece to be held, and the variable-spacing mechanism is installed on the bottom shell of the placement platform. The clamping mechanism is installed on the guide rail of the variable spacing mechanism. The variable spacing mechanism can realize the expansion and contraction actions of the clamping mechanism, thereby enabling the clamping of objects of different sizes; the clamping mechanism can achieve variable stiffness coating of the workpiece. Clamping and adjusting the posture of the workpiece, the invention is suitable for clamping objects of different shapes and sizes, greatly reduces the frequency of adjustment and replacement of traditional clamps, reduces the risk of damage to the workpiece, and has good adaptability and flexibility sex.

Description

A variable spacing pneumatic flexible clamp

Technical field

The invention relates to the field of clamps, and in particular to a variable spacing pneumatic flexible clamp.

Background technique

Fixtures play an important role in the manufacturing process. They are used to fix, position and support workpieces to ensure that the accuracy, stability and consistency of the workpieces can be maintained during processing, assembly and inspection. They are also important for ensuring product processing accuracy and production efficiency. has a vital role. Although traditional rigid fixtures are capable of clamping workpieces in many cases, they cannot flexibly adapt to workpieces with complex shapes and different sizes, requiring frequent fixture replacement and adjustment. In addition, when clamping workpieces with complex surfaces When clamped by rigid clamps, the workpiece will plastically deform, causing the workpiece to be scrapped. Therefore, designing a more adaptable and flexible fixture has become a key issue that needs to be solved in the current manufacturing industry.

Contents of the invention

The purpose of the present invention is to provide a variable spacing pneumatic flexible clamp to solve the above problems. First, in response to the need for the clamp to clamp workpieces of different sizes, a variable spacing mechanism is proposed to realize the clamping without changing the clamp. The function of clamping workpieces of different sizes is proposed. Secondly, a clamping mechanism is proposed to achieve stable clamping of the workpiece and further adjust the posture of the workpiece. Finally, a clamp made of silicone is proposed to achieve variable stiffness of the workpiece. Covered clamping reduces the frequency of fixture replacement and adjustment, avoids the risk of plastic deformation of the workpiece when clamped by the fixture, and improves the adaptability, safety and flexibility of the fixture.

In order to achieve the above object, the technical solution of the present invention is as follows: a variable pitch pneumatic flexible clamp, including a placement platform, a variable pitch mechanism, and a clamping mechanism. The variable pitch mechanism is welded to the bottom shell of the placement platform. , the clamping mechanism is symmetrically arranged on the track of the variable pitch mechanism, and the variable pitch mechanism drives the clamping mechanism to expand and contract. In the clamping mechanism, the air pump drives the silicone clamp to deform to complete the clamping of the workpiece; wherein :

The variable pitch mechanism is welded on the bottom shell of the platform. The variable pitch mechanism includes a flange, a U-shaped crank, a sleeve, a bottom plate, a drive motor and a guide rail. The bottom surface of the bottom plate is fixed with bolts. The above-mentioned driving motor drives the circular flange to rotate through a key connection, and the round holes on both sides of the circular flange are movably connected to the thin end of the U-shaped crank, and the U-shaped crank The thick end is movably connected to the bottom shaft section of the steering gear bracket of the clamping mechanism and positioned through a sleeve.

Further, the clamping mechanism is installed on the guide rail of the variable pitch mechanism. The clamping mechanism includes a steering gear bracket, screws, slider, steering gear, steering gear fixing bolts, clamp fixing frame, and clamp. Fixing bolts, silicone clamps, air pump holder and air pump, there are threaded holes at the bottom of the slider, and the steering gear bracket is fixed with screws and installed in the guide rail groove. The bottom shaft section of the steering gear bracket is connected with the U-shaped crank The round hole at the thick end is flexibly connected. The steering gear bracket is in the shape of a hollow shell. The internal top surface fixes the steering gear through steering gear fixing bolts. The steering gear shaft is connected to the clamp fixing frame. The two clamp fixing frames are fixed. A through hole is opened on the end face, and the silicone clamp is fixed through clamp fixing bolts.

Further, the placement platform includes a placement plate, a short support pole, a long support pole, and a bottom shell. The placement plate is welded to two short support poles and two long support poles, and the short support pole is welded to the two support poles. The top surface of the bottom plate is welded, and the long support rod penetrates the bottom plate and the guide rail and is welded to the bottom shell. An air pump fixing frame is fixed on the bottom shell, and an air pump is installed on the air pump fixing frame.

Further, a plurality of semi-cylindrical chambers are equidistantly opened inside the silicone clamp, and circular through holes are opened on the side to allow each chamber to communicate with each other and connect to the air pump through a hose. The thickness of the silicone on the bottom surface is greater than the thickness of the silicone on the side walls of the chamber.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The variable-spacing pneumatic flexible clamp of the present invention can adjust the clamping spacing by driving the motor, and can clamp workpieces of different sizes, reducing the frequency of clamp replacement and improving the adaptability of the clamp.

2. A variable-spacing pneumatic flexible clamp of the present invention. The clamping end is made of silicone material. When gas is filled into the silicone clamp, due to the multi-chamber structure of the clamp, the two silicone clamps will bend and deform toward the center to achieve the clamping action. , due to the characteristics of silicone material, the silicone clamp will adapt to the contour shape of the clamped workpiece, improving the stability and adaptability of the clamp.

3. A variable spacing pneumatic flexible clamp of the present invention. Due to the effect of internal air pressure, the silicone clamp will clamp the workpiece with a certain clamping force. The clamping force of the silicone clamp can be adjusted by driving air pressure, and the clamp is flexible. material, reducing the risk of damage to the workpiece when clamping it.

4. A variable-spacing pneumatic flexible clamp of the present invention. The steering gear in the clamping mechanism can control the rotation of the clamp fixing frame. When the clamping is stable, the position of the workpiece can be fine-tuned.

The above description is only an overview of the technical solutions of the present invention. In order to have a clearer understanding of the technical means of the present invention and implement them according to the contents of the description, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and accompanying drawings.

Description of the drawings

Figure 1 is a schematic structural diagram of the variable spacing pneumatic flexible clamp of the present invention;

Figure 2 is a schematic structural diagram of the variable pitch mechanism of the present invention;

Figure 3 is a schematic structural diagram of the clamping mechanism of the present invention;

Figure 4 is a schematic structural diagram of the base and placement plate of the present invention;

Figure 5 is a schematic structural diagram of the silicone clamp of the present invention.

Detailed ways

In order to enable those in the technical field to better understand the solution of the present application, the technical solution in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the present invention. In practical applications, improvements and adjustments made by those skilled in the art based on the present invention shall fall within the protection scope of the present invention.

As shown in Figure 1, a variable-pitch pneumatic flexible clamp of the present invention includes a placement platform, a variable-pitch mechanism, and a clamping mechanism. The variable-pitch mechanism 2 is welded to the bottom shell of the placement platform, so The clamping mechanism 3 is symmetrically arranged on the track of the variable pitch mechanism 2. The variable pitch mechanism 2 drives the clamping mechanism to expand and contract. The air pump in the clamping mechanism 3 drives the silicone clamp to deform to complete the clamping of the workpiece. .

As shown in Figure 2, the variable pitch mechanism of this embodiment is welded to the bottom shell 23 of the placement platform 1. The variable pitch mechanism includes a flange 4, a U-shaped crank 5, a sleeve 6, and a bottom plate. 7. Drive motor 8 and guide rail 9. The drive motor 8 is fixed with bolts on the bottom surface of the base plate 7. The drive motor 8 drives the circular flange 4 to rotate through a key connection. The round holes on both sides of the flange 4 are movably connected to the thin end of the U-shaped crank 5 , and the thick end of the U-shaped crank 5 is movably connected to the bottom shaft section of the steering gear bracket 10 of the clamping mechanism 4 and positioned through the sleeve 6 . .

As shown in Figure 3, the clamping mechanism 3 is installed on the guide rail 9 of the variable pitch mechanism 2. The clamping mechanism includes a steering gear bracket 10, screws 11, slider 12, steering gear 13, Steering gear fixing bolt 14, clamp fixing bracket 15, clamp fixing bolt 16, silicone clamp 17, air pump fixing bracket 21 and air pump 22, the slider 12 has a threaded hole at the bottom and the steering gear bracket 11 is fixed with screws 11 and Installed in the groove of the guide rail 9, the bottom shaft section of the steering gear bracket 10 is movably connected to the round hole at the thick end of the U-shaped crank 5. The steering gear bracket 10 is in the shape of a hollow shell, and the inner top surface is fixed by the steering gear bolts 14. Fix the steering gear 13. The axis of the steering gear 13 is connected to the clamp fixing frame 15. Through holes are provided on both fixed end surfaces of the clamp fixing frame 15, and the silicone clamp 17 is fixed by clamp fixing bolts 16.

As shown in Figure 4, the placement platform of this embodiment includes a placement plate 18, a short support pole 19, a long support pole 20, and a bottom shell 23. The placement plate 18, the two short support poles 19 and the two supports The long rod 20 is welded, and the short support rod 19 is welded to the top surface of the bottom plate 7. The long support rod 20 penetrates the bottom plate 7 and the guide rail 9 and is welded to the bottom shell 23. An air pump holder 20 is fixed on the bottom housing 23, and an air pump 19 is installed on the air pump holder.

As shown in Figure 5, the silicone clamp 17 of this embodiment has a plurality of semi-cylindrical chambers at equal intervals inside, and circular through holes are provided on the side to allow each chamber to communicate with each other and connect to the air pump 19 through a hose. The thickness of the silicone on the bottom is larger than that of the chamber. The thickness of the silicone on the side wall of the chamber and its specific clamping method are:

The staff drives the drive motor 8, and the drive motor 8 drives the flange 4 to rotate. The U-shaped crank 5 connected to the flange 4 causes the clamping mechanism to move on the guide rail 9 and expand to the maximum distance position to complete the clamping. Preparatory work before sustaining.

Place the clamped workpiece on the placement plate 18, the drive motor 7 drives the flange 2 to reverse, the U-shaped crank 5 causes the clamping mechanism 3 to shrink on the guide rail 9, when the silicone clamp 17 in the clamping mechanism contacts the workpiece When clamping the workpiece, the driving motor 8 stops working to complete the pre-clamping work.

The air pump 22 is connected to the silicone clamp 15 in the clamping mechanism through a hose. The air pump 22 inflates the silicone clamp with a certain air pressure. The silicone clamp 17 bends and deforms toward the clamping center, and the part of the silicone in contact with the clamped workpiece will adapt to Due to the shape of the workpiece, due to the effect of air pressure, the silicone clamp will complete the clamping of the clamped workpiece with a certain force.

After the clamping is stable, the clamp holder can be rotated by driving the 13-axis rotation of the servo, and the silicone clamp fixed on the clamp holder will also rotate accordingly, thereby changing the posture of the clamped workpiece.

The steps for clamping workpieces of different sizes and shapes are basically the same as the above steps, so no further details will be given.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "top", "bottom", "inner", "upper", "lower", etc. is based on the orientation shown in the drawings. Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the devices and elements referred to must have specific orientations, specific orientation configurations and operations, and therefore cannot be understood as limitations of the present invention.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention and are not limited to the embodiments shown herein. For those skilled in the art, many modifications can be made based on the content of this specification. and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims (5)

1. A variable-pitch pneumatic flexible clamp, characterized in that it includes a placement platform (1), a variable-pitch mechanism (2) and a clamping mechanism (3). The variable-pitch mechanism (2) is welded to the described Placed on the bottom shell of the platform (1), the clamping mechanism (3) is symmetrically arranged on the track of the variable pitch mechanism (2), and the variable pitch mechanism (2) drives the clamping mechanism to expand and contract, so In the clamping mechanism described above, the air pump (22) drives the silicone clamp (17) to deform to complete the clamping of the workpiece. 2. The variable spacing pneumatic flexible clamp according to claim 1, characterized in that the variable spacing mechanism is welded on the bottom shell (23) of the placement platform (1), and the variable spacing mechanism includes: The blue plate (4), U-shaped crank (5), sleeve (6), bottom plate (7), drive motor (8) and guide rail (9), the bottom surface of the bottom plate (7) is fixed with bolts to the drive Motor (8), the driving motor (8) drives the circular flange (4) to rotate through a key connection, and the round holes on both sides of the circular flange (4) are connected with the U-shaped crank ( 5) The thin end is movably connected, and the thick end of the U-shaped crank (5) is movably connected to the bottom shaft section of the steering gear bracket (10) of the clamping mechanism (4) and positioned through the sleeve (6). 3. The variable pitch pneumatic flexible clamp according to claim 1 or 2, characterized in that the clamping mechanism (3) is installed on the guide rail (9) of the variable pitch mechanism (2), so The clamping mechanism includes a steering gear bracket (10), a screw (11), a slider (12), a steering gear (13), a steering gear fixing bolt (14), a clamp fixing frame (15), and a clamp fixing bolt (16). ), silicone clamp (17), air pump holder (21) and air pump (22), the slider (12) has a threaded hole at the bottom and the steering gear bracket (11) is fixed with screws (11) and installed on In the groove of the guide rail (9), the bottom shaft section of the steering gear bracket (10) is movably connected to the round hole at the thick end of the U-shaped crank (5). The steering gear bracket (10) is in the shape of a hollow shell, and the inner top surface The steering gear (13) is fixed with the steering gear fixing bolts (14). The shaft of the steering gear (13) is connected to the clamp fixing frame (15). Through holes are opened on both fixed end surfaces of the clamp fixing frame (15). The clamp fixing bolt (16) fixes the silicone clamp (17). 4. The variable spacing pneumatic flexible clamp according to claim 1 or 2, characterized in that the placement platform includes a placement plate (18), a short support rod (19), a long support rod (20), a bottom shell The body (23), the placing plate (18) is welded to the two short supporting rods (19) and the two long supporting rods (20), and the short supporting rod (19) is connected to the top surface of the bottom plate (7) Welding, the long support rod (20) penetrates the bottom plate (7) and the guide rail (9) and is welded to the bottom shell (23), and the air pump fixing frame (23) is fixed on the bottom shell (23) 20), the air pump (19) is installed on the air pump fixing frame (20). 5. The variable-spacing pneumatic flexible clamp according to claim 1 or 3 or 4, characterized in that a plurality of semi-cylindrical chambers are equidistantly opened inside the silicone clamp (17), and round through holes are opened on the side to make each chamber The chambers are interconnected and connected to the air pump (19) through a hose, and the thickness of the silica gel on the bottom is greater than the thickness of the silica gel on the side wall of the chamber.