Multifunctional clamp

Abstract

The multifunctional clamp comprises a first clamping jaw and a second clamping jaw which are hinged to each other, each of the first clamping jaw and the second clamping jaw comprises an L-shaped clamping part, the two L-shaped clamping parts are connected through a connecting piece, the first end of each L-shaped clamping part comprises a limiting part, the limiting part comprises a sleeve and a limiting column, and the sleeve is sleeved with the limiting column. The limiting column is in threaded connection or pin connection with the sleeve, and the limiting column movably extends out of the two ends of the sleeve; the second end of the L-shaped clamping part of the first clamping jaw comprises a first connecting rod, the L-shaped clamping part of the second clamping jaw comprises a second connecting rod, the first connecting rod and the second connecting rod are in a concave shape, a plug pin is arranged at a notch of the first connecting rod, a limiting bolt is arranged at a notch of the second connecting rod, and the limiting bolt is used for being connected with the plug pin in a clamped mode. The ends of the first connecting rod and the second connecting rod comprise pull rings hinged to the ends of the first connecting rod and the second connecting rod. According to the utility model, the structure of the clamp is optimized, and the compatibility and practicability of the clamp are improved.

Description

Technical Field

[0001] This application relates to the technical field of clamping tools, and particularly relates to a multifunctional fixture. Background Art

[0002] Fixtures are common auxiliary tools in life for clamping workpieces. During machine tool processing, some large workpieces cannot be moved by manpower. It is necessary to use tightening straps or fixtures to fix the workpieces, and then use a balance hoist to directly pull the tightening straps or move the workpieces after clamping the fixtures. However, the tightening straps are only convenient for tying the workpieces tightly from the outside of the workpieces or sleeving them on the outer surface of the workpieces. However, due to their large flexibility and easy deformation, these tightening straps may loosen during the movement, causing the workpieces to fall. In addition, the existing fixtures have a high matching degree with the workpieces, that is, their usage environment is unique and they cannot be compatible with different workpieces, resulting in low practicality. Utility Model Content

[0003] The embodiment of the utility model provides a multifunctional fixture, which optimizes the structure of the fixture, enables the fixture to have compatibility for clamping multiple workpieces, and solves the related technical problems in the prior art.

[0004] The utility model provides a multifunctional fixture, which includes a first clamping jaw and a second clamping jaw that are hinged to each other through a connecting member. Both the first clamping jaw and the second clamping jaw include an L-shaped clamping portion. The first end of the L-shaped clamping portion includes a limiting portion, and the limiting portion includes a sleeve and a limiting column. The limiting column is screwed or pinned to the sleeve, and the limiting column can movably extend out of both ends of the sleeve. The second end of the L-shaped clamping portion of the first clamping jaw includes a first connecting rod, and the L-shaped clamping portion of the second clamping jaw includes a second connecting rod. The first connecting rod and the second connecting rod are concave-shaped. A pin is provided at the concave opening of the first connecting rod, and a limiting bolt is provided at the concave opening of the second connecting rod. The limiting bolt is used for clamping with the pin. The ends of the first connecting rod and the second connecting rod include pull rings hinged thereto.

[0005] Optionally, the limiting bolt includes at least two limiting slots, the limiting slots are U-shaped (read "kan", third tone), and the edges of the limiting slots include tooth groove structures.

[0006] Optionally, the L-shaped clamping portion further includes an inner lining rubber, and the inner lining rubber is nested at the bent portion of the L-shaped clamping portion.

[0007] Optionally, the stress surface of the inner lining rubber includes a flat surface or a curved surface, and the surface includes evenly distributed convex bumps.

[0008] Optionally, a spring is provided between the L-shaped clamping portion of the first clamping jaw and the L-shaped clamping portion of the second clamping jaw.

[0009] Optionally, a compressible airbag is further included between the first link and the second link, with both ends of the compressible airbag engaging with the inner walls of the first link and the second link.

[0010] Optionally, the connector includes a connecting post and connecting caps riveted to both ends of the connecting post, or it includes a connecting post, a partition, and connecting caps riveted to both ends of the connecting post, wherein the partition is connected to the middle of the connecting post.

[0011] Optionally, a tension band may be included between the pull ring on the first link and the pull ring on the second link.

[0012] The beneficial effects of this utility model are:

[0013] The multifunctional clamp provided by this utility model features L-shaped clamping portions on the first and second jaws, enabling it to clamp both cylindrical and block-shaped workpieces. Furthermore, the sleeve at one end of the L-shaped clamping portion and the limiting post structure allow the limiting post to extend from both ends of the sleeve, enabling the clamp to not only clamp one cylindrical workpiece but also simultaneously grip two cylindrical workpieces or hang them together. The first and second connecting rods on the first and second jaws work together to lock the L-shaped clamping portion, preventing workpiece loosening and improving the safety of workpiece handling. Simultaneously, the pull ring hinged to the first and second connecting rods facilitates the fixing of the clamp with a lifting device. In short, this utility model improves the compatibility of the clamp with different workpieces and enhances its practicality. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a multifunctional clamp provided in an embodiment of this application;

[0015] Figure 2 This is a front structural diagram of another multifunctional clamp provided in an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the connector structure in this embodiment.

[0017] Figure label:

[0018] 1: First gripper; 11: First connecting rod; 2: Second gripper; 21: Second connecting rod; 3: Connector; 31: Connecting post; 32: Connecting cap; 33: Partition; 4: Sleeve; 5: Limiting post; 6: Limiting bolt; 7: Pull ring; 8: Inner rubber lining; 9: Spring; 10: Compression airbag. Detailed Implementation

[0019] The technical solutions in the embodiments of the application will now be clearly and completely described with reference to the accompanying drawings. Furthermore, the phrases "in one embodiment" or "in one embodiment" appearing throughout this specification do not necessarily refer to the same embodiment. Moreover, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0020] It should also be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0021] Fixtures are common auxiliary tools used to hold workpieces. During machine tool processing, some large workpieces cannot be moved manually and require the use of tension straps or fixtures to fix them. Then, a balancing hoist is used to directly pull the tension strap or clamp the workpiece before moving it. However, tension straps are only convenient for binding the workpiece from the outside or wrapping around its outer surface. Because of their high flexibility and susceptibility, these tension straps may loosen during movement, causing the workpiece to fall. In addition, existing fixtures have a high degree of compatibility with workpieces, meaning their application environment is unique and they cannot be compatible with different workpieces, resulting in low practicality.

[0022] This utility model provides a multifunctional clamp, including a first jaw 1 and a second jaw 2 hinged together by a connector 3. Both the first jaw 1 and the second jaw 2 include an L-shaped clamping part. The first end of the L-shaped clamping part includes a limiting part, which includes a sleeve 4 and a limiting post 5. The limiting post 5 is screwed or pinned to the sleeve 4 and can extend movably from both ends of the sleeve 4. The second end of the L-shaped clamping part of the first jaw 1 includes a first connecting rod 11, and the L-shaped clamping part of the second jaw 2 includes a second connecting rod 21. The first connecting rod 11 and the second connecting rod 21 are U-shaped. The recess of the first connecting rod 11 is provided with a pin, and the recess of the second connecting rod 21 is provided with a limiting bolt 6. The limiting bolt 6 is used to engage with the pin. The ends of the first connecting rod 11 and the second connecting rod 21 include pull rings 7 hinged thereto.

[0023] like Figure 1As shown, the gripper in this invention has an L-shaped clamping part, enabling it to clamp both columnar and block-shaped workpieces. After the workpiece is clamped in the L-shaped clamping part, a limiting part secures the workpiece and prevents it from slipping. The limiting post 5 of the limiting part can extend in two directions within the sleeve 4, such as... Figure 1 As shown by the middle arrow, the clamp can not only hold one cylindrical workpiece, but also simultaneously extend into two cylindrical workpieces to grasp two workpieces at the same time, or hang two workpieces simultaneously. After clamping the workpiece, the clamping part needs to be locked to prevent the workpiece from falling due to insufficient clamping force. The locking structure includes a U-shaped first connecting rod 11 and a U-shaped second connecting rod 21. The first connecting rod 11 has a pin at its notch, and the second connecting rod 21 has a limit bolt 6 at its notch. The limit bolt 6 engages with the pin to lock the workpiece after clamping, preventing the workpiece from loosening and improving the safety of moving the workpiece. Then, the lifting device simultaneously moves the workpiece to the target station from the pull rings 7 on the first connecting rod 11 and the second connecting rod 21. As can be seen from the above, this utility model improves the compatibility of the clamp for clamping different workpieces and enhances the practicality of the clamp.

[0024] The aforementioned limiting post 5 and sleeve 4 can be screwed together, meaning the rotation direction of the limiting post 5 determines the direction in which the limiting post 5 extends out of the sleeve 4. Alternatively, pin holes can be provided on the sleeve 4, using locating pins to fix the limiting post 5 in different extension directions of the sleeve 4. Furthermore, the L-shaped clamping portion of the first gripper 1 and the L-shaped clamping portion of the second gripper 2 are connected by a connector 3. This connector 3 passes through a connecting hole on the two L-shaped clamping portions and is movable within that hole.

[0025] It should be noted that the aforementioned limiting bolt 6 includes at least two limiting slots, which are U-shaped and have toothed edges. The position of the limiting slots determines the relative distance between the first connecting rod 11 and the second connecting rod 21, thus determining the locking force on the workpiece. Different limiting slots on the limiting bolt 6 are designed to accommodate workpieces of different sizes, further improving the fixture's compatibility. Additionally, the toothed structure on the limiting slots increases the friction between the limiting bolt 6 and the pin surface, preventing the limiting bolt 6 from slipping off the pin surface.

[0026] In some embodiments, the L-shaped clamping portion of the fixture further includes an inner rubber liner 8, which is nested within the bend of the L-shaped clamping portion. The force-bearing surface of the inner rubber liner 8 includes a plane or a curved surface, and its surface contains uniformly distributed protrusions. The inner rubber liner 8 is used to support the outer surface of the cylindrical or tubular workpiece when clamping it, on the one hand to prevent the workpiece surface from being scratched by the L-shaped clamping portion, and on the other hand to assist in clamping the workpiece and increase the clamping force. The protrusions on the surface of the inner rubber liner 8 are used to increase the friction between it and the workpiece surface.

[0027] In some embodiments, such as Figure 2 As shown, a spring 9 is provided between the L-shaped clamping portion of the first gripper 1 and the L-shaped clamping portion of the second gripper 2. A compressible airbag 10 is also provided between the first connecting rod 11 and the second connecting rod 21, and the two ends of the compressible airbag 10 are engaged with the inner walls of the first connecting rod 11 and the second connecting rod 21.

[0028] In this embodiment, a spring 9 is provided between the L-shaped clamping portion of the first gripper 1 and the L-shaped clamping portion of the second gripper 2 to bring the first gripper 1 and the second gripper 2 closer together and close when the workpiece is removed; or a compression spring is used to increase the clamping force of the first gripper 1 and the second gripper 2 when clamping the workpiece. The specific choice can be made according to the actual size of the fixture and the size of the workpiece to be clamped. In addition, a compression airbag 10 between the first link 11 and the second link 21 is used to assist in locking and increase the clamping force of the first gripper 1 and the second gripper 2 on the workpiece; in use, it can be connected to an external air pump, and the air pumping into the compression airbag 10 stops after the preset clamping force is reached. When releasing the workpiece, the airbag 10 is deflated first.

[0029] In some embodiments, such as Figure 3 As shown, the connector 3 includes a connecting post 31 and connecting caps 32 riveted to both ends of the connecting post 31, or it includes a connecting post 31, a partition 33, and connecting caps 32 riveted to both ends of the connecting post 31, wherein the partition 33 is connected to the middle of the connecting post 31. The structure including the partition 33 allows the two L-shaped clamping parts to be in independent spaces, reducing the repeated friction between them and extending their service life. It also reduces the shearing force on the two L-shaped clamping parts.

[0030] In other embodiments, a tension band is included between the pull ring 7 on the first link 11 and the pull ring 7 on the second link 21 of the clamp. This tension band is used to assist in connecting the lifting device to the clamp; of course, the tension band can also be replaced by a wire rope.

[0031] Finally, the multifunctional clamp provided by this utility model includes two hinged first jaws 1 and second jaws 2. Both the first jaws 1 and the second jaws 2 include L-shaped clamping portions. The first end of each L-shaped clamping portion includes a limiting portion, which includes a sleeve 4 and a limiting post 5. The limiting post 5 is screwed or pinned to the sleeve 4 and can extend movably from both ends of the sleeve 4. The second end of the L-shaped clamping portion of the first jaw 1 includes a first connecting rod 11, and the L-shaped clamping portion of the second jaw 2 includes a second connecting rod 21. The first connecting rod 11 and the second connecting rod 21 are U-shaped. A pin is provided at the notch of the first connecting rod 11, and a limiting bolt 6 is provided at the notch of the second connecting rod 21. The limiting bolt 6 is used to engage with the pin. The ends of the first connecting rod 11 and the second connecting rod 21 include pull rings 7 hinged to them. This utility model optimizes the structure of the clamp and improves its compatibility and practicality.

[0032] It should be noted that all the above embodiments belong to the same inventive concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not exhaustive, please refer to the description in other embodiments. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to mutually.

[0033] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multifunctional clamp, comprising a first jaw (1) and a second jaw (2) hinged together by a connector (3), characterized in that, Both the first gripper (1) and the second gripper (2) include an L-shaped clamping part. The first end of the L-shaped clamping part includes a limiting part, which includes a sleeve (4) and a limiting post (5). The limiting post (5) is screwed or pinned to the sleeve (4). The limiting post (5) extends movably from both ends of the sleeve (4). The second end of the L-shaped clamping part of the first gripper (1) includes a first connecting rod (11), and the L-shaped clamping part of the second gripper (2) includes a second connecting rod (21). The first connecting rod (11) and the second connecting rod (21) are U-shaped. The recess of the first connecting rod (11) is provided with a pin, and the recess of the second connecting rod (21) is provided with a limiting bolt (6). The limiting bolt (6) is used to engage with the pin. The ends of the first connecting rod (11) and the second connecting rod (21) include pull rings (7) hinged to them.

2. The multifunctional clamp according to claim 1, characterized in that, The limiting bolt (6) includes at least two limiting slots, the limiting slots are U-shaped, and the edges of the limiting slots include toothed structures.

3. The multifunctional clamp according to claim 2, characterized in that, The L-shaped clamping part also includes an inner rubber lining (8), which is nested at the bend of the L-shaped clamping part.

4. The multifunctional clamp according to claim 3, characterized in that, The stress-bearing surface of the inner lining rubber (8) includes a plane or a curved surface, and the surface contains uniformly distributed convex bulges.

5. The multifunctional clamp according to claim 1, characterized in that, A spring (9) is provided between the L-shaped clamping part of the first jaw (1) and the L-shaped clamping part of the second jaw (2).

6. The multifunctional clamp according to claim 5, characterized in that, A compressible airbag (10) is also included between the first link (11) and the second link (21), and the two ends of the compressible airbag (10) are engaged with the inner walls of the first link (11) and the second link (21).

7. The multifunctional clamp according to claim 1, characterized in that, The connector (3) includes a connecting post (31) and connecting caps (32) riveted to both ends of the connecting post (31), or it includes a connecting post (31), a partition (33) and connecting caps (32) riveted to both ends of the connecting post (31), wherein the partition (33) is connected to the middle of the connecting post (31).

8. The multifunctional clamp according to claim 1, characterized in that: A tension band is included between the pull ring (7) on the first link (11) and the pull ring (7) on the second link (21).

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