Self-centering clamping tool
The self-centering clamping fixture drives the cylinder to drive the transmission component, which in turn drives the clamping follower block to move synchronously. This solves the problem of the existing clamping fixtures requiring manual adjustment of the center positioning, and achieves high-precision and stable clamping of circular products.
Patent Information
- Application Number
- CN202520353861.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing clamping fixtures require manual adjustment of the center positioning, resulting in low center positioning accuracy, poor clamping stability, and frequent fixture replacements, which is time-consuming and labor-intensive.
A self-centering clamping fixture was designed. By driving the transmission component through a cylinder, the clamping follower block moves synchronously and automatically centers and clamps according to the outer diameter of the round product, thus achieving synchronous clamping.
It achieves automatic adjustment according to the diameter of round products, improves the concentricity and stability of clamping, reduces the number of tooling changes, and is simple and efficient to operate.
Smart Images
Figure CN223777005U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of non-standard automation technology, and in particular to a self-centering clamping fixture. Background Technology
[0002] Round products such as cylinders, disks, and rings are common in the production industry and have a wide range of applications, including food, automobiles, 3C electronics, and medical devices.
[0003] When processing or moving round products, clamping fixtures are usually required. However, most existing clamping fixtures require manual adjustment based on the diameter of the round product, and the center can only be determined by visual inspection. This greatly reduces the accuracy of center positioning, resulting in inaccurate concentricity, poor clamping stability, and affecting subsequent processing of the product. Furthermore, it is necessary to frequently change clamping fixtures according to different diameters, which is time-consuming and labor-intensive. Utility Model Content
[0004] The purpose of this invention is to provide a self-centering clamping fixture that can self-center and clamp according to the diameter of a round product, and has good clamping stability.
[0005] To achieve the above objectives, this utility model provides a self-centering clamping fixture, comprising:
[0006] The base is circular in shape and has an annular support platform on the inner surface.
[0007] Multiple clamping follower blocks are evenly distributed along the circumference of the annular support, and the clamping follower blocks are slidably connected to the annular support. Each clamping follower block is provided with a cylindrical pin.
[0008] The transmission component includes a transmission crank and an annular transmission plate. The annular transmission plate is mounted on the annular support platform and has a plurality of waist holes along the circumferential direction. The cylindrical pins correspond one-to-one with the waist holes and can be slidably inserted into the corresponding waist holes. One end of the transmission crank is connected to the annular transmission plate.
[0009] A cylinder is driven and connected to the other end of the transmission crank to drive the transmission component to rotate. The rotation of the transmission component causes all the clamping follower blocks to move synchronously in the radial direction relative to the round base to clamp or release a round product.
[0010] Optionally, the circular base is provided with a plurality of sliding grooves along the circumferential direction. The sliding grooves extend from the outer wall of the circular base along the radial direction of the circular base to the inner ring surface of the annular support. The clamping follower block corresponds to each of the sliding grooves and one end is slidably disposed in the sliding groove.
[0011] Optionally, the other end of the clamping follower block is V-shaped and used to clamp the circular product.
[0012] Optionally, the pushing cylinder is connected to the round base via a fixed seat.
[0013] Optionally, the mounting base has a concave opening, at which a bearing is rotatably mounted, the bearing being sleeved on the cylinder body of the push cylinder.
[0014] Optionally, a safety guard is provided at the connection between the push cylinder and the transmission crank, and the safety guard is connected to the fixed base.
[0015] Optionally, the safety shield is arc-shaped and fits against the outer ring surface of the circular base.
[0016] Optionally, the telescopic end of the push cylinder is rotatably connected to the other end of the transmission crank.
[0017] Optionally, the telescopic end of the push cylinder is provided with a spherical bearing, and the other end of the transmission crank is provided with a connecting hole. The spherical bearing is connected to the connecting hole by a level screw and a nut.
[0018] Optionally, the self-centering clamping fixture further includes an annular sealing plate, which covers the upper surface of the circular base.
[0019] The self-centering clamping fixture provided by this utility model has at least the following effective effects:
[0020] 1) It can self-center and clamp according to the diameter of round products. For products with small diameter differences that need to be produced on one machine, it effectively reduces the number of tooling changes and meets the clamping needs of various round products.
[0021] 2) Since all the clamping follower blocks move synchronously, the stopping position is determined by the outer diameter of the round product and the product is clamped and centered. This ensures that the round product is clamped while its concentricity remains unchanged, and the clamping force of all the clamping follower blocks is consistent, so that there will be no problem of uneven force on the product.
[0022] 3) The entire device has a compact structure and can clamp round products in a ring. It has good stability, high efficiency and precision, and is simple and convenient to operate. Attached Figure Description
[0023] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:
[0024] Figure 1This is an overall schematic diagram of a self-centering clamping fixture provided in an embodiment of the present invention;
[0025] Figure 2 An exploded view of a self-centering clamping fixture provided in an embodiment of this utility model;
[0026] Figure 3 This is a schematic diagram of the structure of a self-centering clamping fixture provided in an embodiment of the present invention without the safety guard and annular sealing plate;
[0027] Figure 4 This is a schematic diagram of the structure of the circular base provided in an embodiment of the present invention;
[0028] Figure 5 This is a schematic diagram of the arrangement of the clamping follower block on the circular base according to an embodiment of the present invention.
[0029] in:
[0030] 100-Round base; 110-Annular bearing platform; 120-Slide groove; 130-Annular sealing plate; 200-Clamping follower block; 210-Cylindrical pin; 300-Transmission component; 310-Transmission crank; 320-Annular transmission plate; 321-Waist hole; 400-Push cylinder; 410-Spherical bearing; 500-Round product; 600-Fixed seat; 700-Bearing; 800-Safety guard; 900-Equal height screw; 910-Nut. Detailed Implementation
[0031] To make the objectives, advantages, and features of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Please refer to the accompanying drawings for a clearer understanding of the objectives, features, and advantages of this utility model. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes and to enable those skilled in the art to understand and read the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, provided they produce the same or similar effects and achieve the same objectives as this utility model, should still fall within the scope of the technical content disclosed in this utility model.
[0032] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects unless otherwise expressly indicated. As used in this invention, the term “or” is generally used to include “and / or” unless otherwise expressly indicated. As used in this invention, the term “a number” is generally used to include “at least one” unless otherwise expressly indicated. As used in this invention, the term “at least two” is generally used to include “two or more” unless otherwise expressly indicated. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] Please refer to Figures 1-3 This embodiment provides a self-centering clamping fixture, including:
[0035] The circular base 100 is circular in shape and has an annular support platform 110 on its inner surface;
[0036] Multiple clamping follower blocks 200 are evenly distributed along the circumference of the annular support 110, and the clamping follower blocks 200 are slidably connected to the annular support 110. Each clamping follower block 200 is provided with a cylindrical pin 210.
[0037] The transmission component 300 includes a transmission crank 310 and an annular transmission plate 320. The annular transmission plate 320 is mounted on an annular support 110, and the annular transmission plate 320 has a plurality of waist holes 321 along the circumferential direction. The cylindrical pin 210 corresponds to the waist hole 321 one by one and can be slidably inserted into the corresponding waist hole 321. One end of the transmission crank 310 is connected to the annular transmission plate 320.
[0038] The cylinder 400 is connected to the other end of the transmission crank 310 to drive the transmission component 300 to rotate. The rotation of the transmission component 300 drives all the clamping follower blocks 200 to move synchronously in the radial direction relative to the round base 100 to clamp or release a round product 500.
[0039] The working principle of the self-centering clamping fixture provided in this embodiment is as follows:
[0040] The cylinder 400 extends and drives the transmission component 300 to rotate. When the transmission component 300 rotates, it uses its waist hole 321 to drive the cylindrical pin 210. The cylindrical pin 210's movement causes the clamping follower blocks 200 to move radially synchronously relative to the round base 100 to clamp the round product 500. Because all the clamping follower blocks 200 move synchronously, their stopping position is determined by the outer diameter of the round product 500, ensuring that the round product 500 remains concentric while being clamped, and that the clamping force of all the clamping follower blocks 200 remains consistent, preventing uneven force distribution on the product. Conversely, when it is necessary to release the round product 500, simply drive the cylinder 400 to retract; the operation is simple and convenient.
[0041] In this embodiment, the clamping force on the circular product 500 can be controlled according to the output force of the pushing cylinder 400. Therefore, the cylinder diameter can be selected according to the clamping force requirements of the circular product 500, and this utility model does not impose any limitations on this. In addition, during the clamping process of the circular product 500, the air intake of the pushing cylinder 400 can be connected to a solenoid valve and controlled manually or automatically by electricity.
[0042] like Figure 4 and Figure 5 As shown, the circular base 100 has a plurality of sliding grooves 120 along its circumference. The sliding grooves 120 extend from the outer wall of the circular base 100 along the radial direction to the inner circumferential surface of the annular support 110. The clamping follower blocks 200 correspond one-to-one with the sliding grooves 120 and are slidably disposed at one end within the sliding grooves 120. In this embodiment, there are 9 clamping follower blocks 200, so there are also 9 sliding grooves 120, which are evenly distributed along the circumference of the circular base 100.
[0043] In this embodiment, one end of the clamping follower block 200 is slidably inserted into the slide groove 120, and the other end is V-shaped and used to clamp the circular product 500. The other end of the clamping follower block 200 will abut against the outer wall of the circular product 500, so the V-shaped design can improve the stability of clamping.
[0044] In this embodiment, the transmission crank 310 and the annular transmission plate 320 are integrally formed. This utility model does not limit the extension direction and size of its upper waist hole 321, as long as it can drive the clamping follower block 200 to move radially relative to the round base 100 when the transmission component 300 rotates.
[0045] Please continue to refer to Figure 2 and Figure 3 The cylinder 400 is connected to the round base 100 via a fixed seat 600. In other words, the cylinder 400 can be mounted on the round base 100 via the fixed seat 600, and the fixed seat 600 can be fixed to the round base 100 by means of a threaded connection.
[0046] Preferably, the fixed base 600 has a concave opening, and a bearing 700 is rotatably mounted at the concave opening. The bearing 700 is sleeved on the cylinder body of the push cylinder 400. By using the bearing 700 as a transition, the rotation of the push cylinder 400 can be avoided when the push cylinder 400 drives the transmission component 300 to rotate, thus improving the smoothness of the operation of the entire self-centering clamping fixture.
[0047] Preferably, a safety guard 800 is provided at the connection between the cylinder 400 and the transmission crank 310, and the safety guard 800 is connected to the fixed base 600. The safety guard 800 is mainly used to cover the exposed transmission parts, serving both safety and aesthetic purposes.
[0048] More preferably, the safety guard 800 is arc-shaped and fits the outer ring surface of the round base 100 to further enhance the aesthetics of the entire self-centering clamping fixture.
[0049] In this embodiment, the extension end of the cylinder 400 is rotatably connected to the other end of the transmission crank 310.
[0050] Please continue to refer to Figure 2 and Figure 3 A spherical bearing 410 is provided at the telescopic end of the cylinder 400, and a connecting hole is provided at the other end of the transmission crank 310. The spherical bearing 410 is connected to the connecting hole through a leveling screw 900 and a nut 910. In this embodiment, the spherical bearing 410 is located below the connecting hole. The leveling screw 900 passes vertically through the threaded hole on the spherical bearing 410 and the connecting hole, and is then locked by the nut 910. Because the leveling screw 900 has advantages such as high strength, convenient installation and disassembly, and high connection stability, using the leveling screw 900 for connection and fixation is the best rotation method.
[0051] Please refer to Figure 1 and Figure 2 The self-centering clamping fixture also includes an annular sealing plate 130, which covers the upper surface of the circular base 100. In this embodiment, the annular sealing plate 130 can be installed on the upper surface of the circular base 100 by screws to cover the exposed clamping follower block 200, annular transmission plate 320 and other structures below, thereby improving the aesthetics and safety of the entire self-centering clamping fixture.
[0052] In summary, this utility model embodiment provides a self-centering clamping fixture capable of self-centering and clamping the circular product 500 according to changes in its diameter, meeting the clamping requirements of various circular products. Furthermore, since all the clamping follower blocks 200 move synchronously, stopping at a position that centers and clamps according to the outer diameter of the circular product 500, it ensures that the circular product 500 remains concentric while being clamped, and that the clamping force of all the clamping follower blocks 200 remains consistent, preventing uneven force distribution on the product.
[0053] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention's technical solutions using the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention's technical solutions. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention's technical solutions, shall still fall within the protection scope of the present invention's technical solutions.
Claims
1. A self-centering clamping fixture, characterized in that, include: The base is circular in shape and has an annular support platform on the inner surface. Multiple clamping follower blocks are evenly distributed along the circumference of the annular support, and the clamping follower blocks are slidably connected to the annular support. Each clamping follower block is provided with a cylindrical pin. The transmission component includes a transmission crank and an annular transmission plate. The annular transmission plate is mounted on the annular support platform and has a plurality of waist holes along the circumferential direction. The cylindrical pins correspond one-to-one with the waist holes and can be slidably inserted into the corresponding waist holes. One end of the transmission crank is connected to the annular transmission plate. A cylinder is driven and connected to the other end of the transmission crank to drive the transmission component to rotate. The rotation of the transmission component causes all the clamping follower blocks to move synchronously in the radial direction relative to the round base to clamp or release a round product.
2. The self-centering clamping fixture according to claim 1, characterized in that, The circular base is provided with a plurality of sliding grooves along the circumferential direction. The sliding grooves extend from the outer wall of the circular base along the radial direction of the circular base to the inner ring surface of the annular support. The clamping follower block corresponds to each of the sliding grooves and one end is slidably disposed in the sliding groove.
3. The self-centering clamping fixture according to claim 2, characterized in that, The other end of the clamping follower block is V-shaped and used to clamp the circular product.
4. The self-centering clamping fixture according to claim 1, characterized in that, The push cylinder is connected to the round base via a fixed seat.
5. The self-centering clamping fixture according to claim 4, characterized in that, The fixed base has a concave opening, and a bearing is rotatably mounted at the concave opening. The bearing is sleeved on the cylinder body of the push cylinder.
6. The self-centering clamping fixture according to claim 4, characterized in that, A safety guard is provided at the connection between the push cylinder and the transmission crank, and the safety guard is connected to the fixed base.
7. The self-centering clamping fixture according to claim 6, characterized in that, The safety shield is arc-shaped and fits snugly against the outer ring surface of the circular base.
8. The self-centering clamping fixture according to claim 1, characterized in that, The telescopic end of the push cylinder is rotatably connected to the other end of the transmission crank.
9. The self-centering clamping fixture according to claim 8, characterized in that, The telescopic end of the push cylinder is provided with a spherical bearing, and the other end of the transmission crank is provided with a connecting hole. The spherical bearing is connected to the connecting hole by a level screw and a nut.
10. The self-centering clamping fixture according to claim 1, characterized in that, The self-centering clamping fixture also includes an annular sealing plate, which covers the upper surface of the circular base.