Pneumatic three-jaw clamp

Abstract

The utility model relates to the technical field of pneumatic clamping jaws, in particular to a pneumatic three-jaw clamp which comprises a pneumatic assembly, a clamping jaw assembly, a clamping jaw assembly, a clamping jaw assembly and a clamping jaw assembly, the pneumatic assembly comprises a base and a linkage piece arranged on the base, and the linkage piece is provided with one or more clamping jaws; the clamping jaw comprises a jaw plate and a clamping block arranged on the jaw plate, a through hole is formed in the bottom of the jaw plate, a pipeline is installed at the bottom of the jaw plate, and the pipeline is matched with the linkage piece and used for pneumatically controlling the clamping jaw; according to the clamp, the extending air bag is inflated through the pneumatic assembly and extends out of the containing area to fill gaps on the surface of a workpiece or adapt to protruding parts of the workpiece, tight attachment and effective clamping of irregular surfaces are achieved, and the application range of the clamp is greatly widened through the adjustability.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic claw technology field, concretely is a kind of pneumatic three claw clamps. BACKGROUND

[0002] Pneumatic three claw clamps take compressed air as power source, drive three clamps claw synchronous motion by piston, cylinder and other components, realize the clamping and loosening of workpiece, and are widely used in industrial production.

[0003] Pneumatic three claw clamps are usually suitable for regular shape workpieces such as circle, regular polygon, for some irregular shape workpieces, clamp claw is difficult to realize effective clamping. Even if by increasing auxiliary device to adapt to irregular workpiece, it will increase the complexity and cost of clamp, and can affect the versatility and reliability of clamp, based on this, the application provides a kind of pneumatic three claw clamps. SUMMARY

[0004] In view of the deficiencies of prior art, the utility model provides a kind of pneumatic three claw clamps, solve the problem that traditional pneumatic three claw clamps in prior art are suitable for regular shape workpiece, and irregular workpiece clamping is difficult, and increasing auxiliary device will increase complexity and cost and affect versatility and reliability.

[0005] The utility model discloses a kind of pneumatic three claw clamps, comprising:

[0006] Pneumatic assembly, the pneumatic assembly includes base and linkage arranged on base, one will be installed on the linkage Multiple clamps claw;

[0007] Clamp claw, the clamp claw includes claw plate and clamping block arranged on the claw plate, the bottom of the claw plate is provided with through hole, and is equipped with pipeline, the pipeline is adapted with linkage, for pneumatically controlled clamp claw.

[0008] As a further improvement of the utility model, the clamping block includes block body, both sides of the block body are provided with storage area, and the extension air bag is installed at the storage area.

[0009] As a further improvement of the utility model, the extension air bag is installed with stopper at one end, and the stopper is flushly adapted with the edge of storage area.

[0010] As a further improvement of the utility model, the block body is provided with clamping area on one side, the clamping area is curvedly provided at both sides with preset angle, and extends to the storage area,

[0011] As a further improvement of the utility model, the clamping area is evenly spaced with rubber soft block, and the spacing area is provided with expansion element between every two rubber soft blocks.

[0012] As a further improvement of the utility model, a fitting groove is formed in the middle of the other side of the block, the fitting groove is matched with the clamping plate, and is communicated with the pneumatic assembly through the pipeline.

[0013] As a further improvement of the utility model, a shunt cavity is arranged on one side of the inner side of the block and located at one side of the fitting groove, branch pipes are evenly arranged on one side of the shunt cavity, and the branch pipes are matched with the expansion members.

[0014] As a further improvement of the utility model, a communication port is formed in the middle of the fitting groove, and the communication port is matched with the pipeline.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] The utility model discloses a pneumatic assembly is used to inflate the extension air bag, and the extension air bag is stretched out from the storage area, and the gap on the surface of the workpiece is filled or the convex part is adapted, so that the close adhesion and effective clamping of the irregular surface are realized, and the adjustable nature greatly widens the application range of the clamp.

[0017] The clamping area is curved at a preset angle on both sides and extends to the storage area, cooperates with the evenly distributed rubber soft blocks, can better adapt to the surface of the workpiece of different shapes, increases the contact area with the workpiece, and the expansion members are arranged in the interval area of the rubber soft blocks and are communicated with the pneumatic assembly through the shunt cavity and the branch pipes.

[0018] The design of the shunt cavity and the branch pipes ensures that the compressed air can be evenly distributed to each expansion member, ensures that each expansion member moves synchronously, avoids the problems of insufficient expansion or excessive expansion of part of the expansion members caused by uneven air pressure, and thus realizes more accurate and stable clamping of the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application and do not constitute improper limitations on the present application.

[0020] Figure 1 It is a three-dimensional structure schematic view of the pneumatic assembly and the clamping jaw combination of the utility model;

[0021] Figure 2 It is a front view structure schematic view of the pneumatic assembly and the clamping jaw combination of the utility model.

[0022] Figure 3 It is the bottom structure schematic view of the pneumatic assembly and the jaw combination of the utility model;

[0023] Figure 4 It is the top structure schematic view of the pneumatic assembly and the jaw combination of the utility model;

[0024] Figure 5 It is the three-dimensional structure schematic view of the clamping block of the utility model;

[0025] Figure 6 It is the front view structure schematic view of the clamping block of the utility model;

[0026] Figure 7 It is the Figure 6 A-A section structure schematic view of the utility model.

[0027] In the drawing: 1, pneumatic assembly; 2, jaw;

[0028] 11, base; 12, linkage;

[0029] 21, jaw plate; 22, clamping block; 23, pipeline; 24, stop block; 25, extension air bag;

[0030] 221, block; 222, storage area; 223, clamping area; 224, spacing area; 225, rubber soft block; 226, expansion piece; 227, shunt cavity; 228, engagement groove; 229, communication port; 2210, branch pipe. DETAILED DESCRIPTION

[0031] The following will disclose multiple embodiments of the utility model with drawings, for the purpose of clear illustration, many details on the real object will be described in the following description. However, it should be understood that these details on the real object should not be used to limit the utility model. That is to say, in some embodiments of the utility model, these details on the real object are unnecessary. In addition, for the purpose of simplifying the drawing, some conventional structures and components will be drawn in a simple schematic way in the drawing.

[0032] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled person in the art, when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the utility model.

[0033] Please refer to Figures 1-7 The pneumatic three-jaw clamp takes compressed air as the power source, drives three jaws 2 synchronous movement through piston, cylinder and other components, realizes the clamping and loosening of workpiece, and is widely used in industrial production.

[0034] The pneumatic three-jaw clamp is generally suitable for workpieces with regular shapes such as circles, regular polygons, etc. For some irregularly shaped workpieces, the clamping jaw 2 is difficult to achieve effective clamping. Even if auxiliary devices are added to adapt to irregular workpieces, the complexity and cost of the clamp will be increased, and the universality and reliability of the clamp may be affected. Based on this, the present application provides a pneumatic three-jaw clamp, comprising:

[0035] A pneumatic assembly 1, the pneumatic assembly 1 comprises a base 11 and a linkage 12 arranged on the base 11, and one or more clamping jaws 2 are installed on the linkage 12;

[0036] The clamping jaw 2 comprises a jaw plate 21 and a clamping block 22 arranged on the jaw plate 21. The bottom of the jaw plate 21 is provided with a through hole, and a pipe 23 is installed. The pipe 23 is matched with the linkage 12, and is used for pneumatically controlling the clamping jaw 2.

[0037] The base 11 is made of high-strength aluminum alloy material, and its outer shape is designed as a circle. The bottom is flat and provided with a plurality of mounting holes. These mounting holes can be used to stably install the base 11 on the workbench of a machining equipment such as a numerical control lathe, a milling machine, etc. by bolts. The inside of the base 11 is a hollow structure. This design not only reduces the overall weight, but also provides space for the internal gas path layout.

[0038] An air inlet is arranged at the center position of the base 11. The air inlet is connected with an external compressed air source through an air pipe. Compressed air enters the gas path system inside the base 11 through the air inlet.

[0039] The linkage 12 is installed above the base 11. It is composed of a central rotating disc and three radial connecting rods. The central rotating disc is connected with the base 11 through a bearing and can rotate flexibly. One end of the connecting rod is hinged with the central rotating disc, and the other end is connected with the clamping jaw 2.

[0040] The central rotating disc has a cylindrical cavity inside. The cavity is communicated with the gas path inside the base 11. When compressed air enters the cavity, it will push the piston inside the central rotating disc to move. The movement of the piston is transmitted to the clamping jaw 2 through the connecting rod, so as to realize the synchronous opening and closing of the clamping jaw 2.

[0041] The jaw plate 21 is made of stainless steel, which has good corrosion resistance and strength. The shape of the jaw plate 21 is arc-shaped, which is matched with the shape of the common circular workpiece. The through hole in the bottom of the jaw plate 21 is circular. The pipe 23 is installed in the through hole by threaded connection, which ensures good sealing and prevents compressed air leakage.

[0042] The clamping block 22 is installed on the inner side surface of the jaw plate 21, adopts a replaceable design, and the material of the clamping block 22 is selected according to different workpiece materials and processing requirements. For example, for soft workpieces, a rubber material clamping block 22 can be selected to avoid scratching the workpiece surface; for hard workpieces, a hard alloy material clamping block 22 can be selected to provide sufficient clamping force.

[0043] The surface of the clamping block 22 is designed with anti-skid lines, such as cross stripes or grid lines, which can increase the friction with the workpiece surface and improve the stability of clamping.

[0044] The base 11 adopts an aluminum alloy material and a hollow design, which reduces the weight while ensuring strength, facilitates installation and movement, and the internal hollow structure is beneficial to air path layout, enabling smooth transmission of compressed air.

[0045] The center rotating disc and connecting rod structure of the linkage 12 are designed ingeniously, and the synchronous opening and closing of the clamping jaw 2 are realized through the movement of the piston, ensuring the consistency and stability of the action of the clamping jaw 2 and improving the precision of workpiece clamping.

[0046] The arc-shaped design of the jaw plate 21 is suitable for common circular workpieces, and the outer side heat dissipation grooves can effectively dissipate heat, ensuring the performance stability of the jaw plate 21 during long-term use.

[0047] The clamping block 22 adopts a replaceable design, and the appropriate material is selected according to different workpiece materials, and the anti-skid lines on the surface increase the friction, which can avoid scratching the workpiece and provide sufficient clamping force, improving the universality and applicability of the clamp.

[0048] The through hole at the bottom of the jaw plate 21 and the pipe 23 are designed, so that the compressed air can be accurately transmitted to the clamping jaw 2, realizing effective pneumatic control of the clamping jaw 2, ensuring the rapid response and reliable action of the clamp.

[0049] The clamping block 22 includes a block body 221, both sides of the block body 221 are provided with receiving areas 222, and an extension air bag 25 is installed at the receiving area 222.

[0050] One end of the extension air bag 25 is installed with a stop block 24, and the stop block 24 is flushly matched with the edge of the receiving area 222.

[0051] One side of the block body 221 is provided with a clamping area 223, the clamping area 223 is curved at both sides at a preset angle, and extends to the receiving area 222,

[0052] The clamping area 223 is uniformly and spacedly provided with rubber soft blocks 225, and a spacing area 224 is maintained between every two rubber soft blocks 225, and an expansion member 226 is arranged at the spacing area 224.

[0053] A fitting groove 228 is provided in the middle of the other side of the block 221. The fitting groove 228 is adapted to the clamping plate and is connected to the pneumatic component 1 through the pipe 23.

[0054] The clamping block 22 is a key component in the pneumatic three-jaw chuck that directly contacts the workpiece. It is used to improve the clamping ability of workpieces with different shapes and characteristics. The storage area 222 is located on both sides of the block 221 and is designed as a rectangular groove. The depth and width of the groove are precisely designed according to the size of the extension airbag 25 to ensure that the extension airbag 25 can be completely stored in it and that the overall shape and function of the clamping block 22 are not affected when stored.

[0055] The extension airbag 25 is made of elastic rubber material, which has good flexibility and elasticity. Its interior is hollow and is connected to the pneumatic component 1 through the pipe 23. When the pneumatic component 1 inflates the extension airbag 25, the airbag will expand rapidly and extend out of the storage area 222; when deflated, the airbag will contract and return to the storage area 222.

[0056] The stop block 24 is installed at one end of the extension airbag 25 and is made of the same high-strength plastic material as the block 221. The shape of the stop block 24 fits the edge of the storage area 222. When the extension airbag 25 is fully retracted, the stop block 24 is flush with the edge of the storage area 222, which serves to protect the extension airbag 25 and maintain the overall aesthetic appearance of the clamping block 22.

[0057] The clamping area 223 is curved at a preset angle (e.g., 30°) on both sides, which allows the clamping area 223 to better fit workpieces with curved surfaces. The curved portion extends to the storage area 222, further increasing the length and adaptability of the clamping area 223.

[0058] Rubber blocks 225 are evenly spaced on the clamping area 223 and are made of highly elastic rubber material. The surface of the rubber blocks 225 is specially treated to provide good anti-slip properties. A certain gap 224 is maintained between every two rubber blocks 225, and the width of this gap 224 is designed according to the size of the rubber blocks 225 and the actual application requirements.

[0059] An expansion member 226 is disposed in the interval region 224 and is made of expandable rubber material. The expansion member 226 is also connected to the pneumatic assembly 1 through the pipe 23. When inflated, the expansion member 226 expands to increase the clamping force on the workpiece; when deflated, it contracts.

[0060] The fitting groove 228 is opened in the other side of the middle of the block 221, which is in the shape of a rectangle. Its size and shape are accurately matched with the clamping plate, and the clamping plate can be tightly embedded in the fitting groove 228. The fitting groove 228 is communicated with the pneumatic assembly 1 through the pipeline 23, and when the pneumatic assembly 1 is inflated into the fitting groove 228, the clamping plate will be tightly combined with the block 221 under the action of air pressure, further enhancing the connection stability between the clamping block 22 and the claw plate 21.

[0061] The design of the extension air bag 25 enables the clamping block 22 to be self-adapted to the shape of the workpiece. For some uneven or protruding workpieces, the extension air bag 25 can be inflated to extend and fill the gap, achieving all-around clamping of the workpiece, greatly improving the clamping ability of the clamp on irregular workpieces.

[0062] The curved design on both sides of the clamping area 223 and the distribution of the rubber soft block 225 can better fit the surface of workpieces of different shapes, increase the contact area, and improve the stability of clamping.

[0063] The setting of the expansion piece 226 can increase the clamping force on the workpiece when needed, ensuring that the workpiece will not loosen or shift during processing. At the same time, the use of the rubber soft block 225 not only provides good anti-skid performance, but also avoids damage to the surface of the workpiece, protecting the quality of the workpiece.

[0064] The matching design of the fitting groove 228 and the clamping plate realizes tight combination through pneumatic control, enhances the connection stability between the clamping block 22 and the claw plate 21, reduces loosening or displacement caused by vibration or external force during clamping, and improves the reliability and service life of the entire clamp.

[0065] The inner side of the block 221 is provided with a shunt cavity 227 on one side of the fitting groove 228, and the shunt cavity 227 is uniformly and spacedly provided with branch pipes 2210 on one side.

[0066] The fitting groove 228 is provided with a communication port 229 in the middle, and the communication port 229 is matched with the pipeline 23.

[0067] The shunt cavity 227 is arranged on the inner side of the block 221 and located on one side of the fitting groove 228, and has a whole flat cuboid shape. The inside is a hollow structure made of high-strength plastic material, which not only ensures the strength of the shunt cavity 227, but also reduces the weight. The other side of the shunt cavity 227 is tightly connected with the fitting groove 228, and the other side is uniformly and spacedly distributed with multiple branch pipe 2210 connection ports.

[0068] The length and width of the distribution cavity 227 are designed according to the size of the block 221 and the number of branch pipes 2210 that need to be connected. The branch pipes 2210 are evenly spaced on one side of the distribution cavity 227 and are connected to the distribution cavity 227 by a sealing threaded connection. This connection ensures good sealing to prevent compressed air leakage. The other end of the branch pipe 2210 is adapted to the air inlet of the expansion element 226 and is also connected by a sealing connection to ensure that compressed air can be smoothly transmitted from the distribution cavity 227 to the expansion element 226.

[0069] The branch pipe 2210 is made of flexible rubber material, which has good flexibility and corrosion resistance. This ensures that compressed air can enter the expansion element 226 quickly and stably, achieving rapid expansion and contraction of the expansion element 226.

[0070] The communication port 229 is circular and is located in the middle of the fitting groove 228. Its diameter is adapted to the outer diameter of the pipeline 23. The edge of the communication port 229 is smooth to ensure that the pipeline 23 can be smoothly inserted and tightly connected.

[0071] The communication port 229 serves as a connection channel between the fitting groove 228 and the pipeline 23. When the pipeline 23 is connected to the pneumatic assembly 1, compressed air can enter the fitting groove 228 through the communication port 229 and then flow into the distribution cavity 227, providing air supply for the branch pipes 2210 and the expansion elements 226.

[0072] The design of the distribution cavity 227 and the branch pipes 2210 allows compressed air to be evenly distributed to each expansion element 226, ensuring that each expansion element 226 can expand and contract synchronously, thereby achieving more precise and stable clamping force control of the workpiece. This uniform air pressure distribution method avoids the problem of insufficient or excessive expansion of some expansion elements 226 due to uneven air pressure, improving the clamping precision of the clamp.

[0073] The sealing connection of the branch pipes 2210 and the communication port 229 effectively prevents compressed air leakage, ensuring the stability and reliability of the entire pneumatic system. At the same time, the flexible material of the branch pipes 2210 can adapt to certain bending and deformation, reducing the probability of failure due to pipeline 23 damage and prolonging the service life of the clamp.

[0074] Through the connection of the communication port 229 and the pipeline 23, the pneumatic control of the entire clamping block 22 is more flexible. The air pressure provided by the pneumatic assembly 1 can be easily adjusted according to the shape and clamping requirements of different workpieces, thereby changing the expansion degree of the expansion elements 226 and achieving effective clamping of workpieces of different sizes and shapes, improving the versatility and adaptability of the clamp.

[0075] The above merely describes the embodiments of the present application and is not intended to limit the present application. The present application can be changed and modified in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A pneumatic three-jaw clamp, characterized in that it comprises: a pneumatic assembly (1) comprising a base (11) and a linkage (12) arranged on the base (11), and one or more clamping jaws (2) mounted on the linkage (12); the clamping jaw (2) comprising a jaw plate (21) and a clamping block (22) arranged on the jaw plate (21), the bottom of the jaw plate (21) being provided with a through hole, and a pipe (23) being mounted thereon, the pipe (23) being adapted to the linkage (12) for pneumatic control of the clamping jaw (2).

2. A pneumatic three jaw chuck as claimed in claim 1 wherein: The clamping block (22) comprises a block body (221), both sides of the block body (221) being provided with a receiving area (222), and an extension air bag (25) being mounted at the receiving area (222).

3. A pneumatic three jaw chuck as claimed in claim 2, wherein: One end of the extension air bag (25) is provided with a stop block (24) flush-fitted with the edge of the receiving area (222).

4. A pneumatic three jaw chuck as claimed in claim 2, wherein: One side of the block body (221) is provided with a clamping area (223), both sides of the clamping area (223) being curved at a preset angle and extending to the receiving area (222).

5. A pneumatic three jaw chuck as claimed in claim 4, wherein: The clamping area (223) is uniformly spaced rubber soft blocks (225), and each two rubber soft blocks (225) are provided with a spacing area (224) therebetween, and an expansion element (226) is arranged at the spacing area (224).

6. The pneumatic three jaw chuck as claimed in claim 2, wherein: A matching groove (228) is arranged at the middle of the other side of the block body (221), the matching groove (228) is adapted to the clamping plate, and is communicated with the pneumatic assembly (1) through the pipe (23).

7. The pneumatic three jaw chuck as claimed in claim 2, wherein: A shunt cavity (227) is arranged at one side of the inner side of the block body (221) at the matching groove (228), and branch pipes (2210) are uniformly and spacedly arranged at one side of the shunt cavity (227), the branch pipes (2210) are adapted to the expansion element (226).

8. A pneumatic three jaw chuck as claimed in claim 6 wherein: A communication port (229) is arranged at the middle of the matching groove (228), and the communication port (229) is adapted to the pipe (23).

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