CN113927500A - Clamping tool - Google Patents

Abstract

The present invention provides a clamping tool comprising: the device comprises a support rod, a first clamping rod fixedly arranged on the support rod, a second clamping rod with one end movably arranged on the support rod, a rotating shaft connected to the other end of the second clamping rod, a handle which is pivotally connected to the rotating shaft and can rotate relative to the second clamping rod, and a floating clamp which is connected to the second clamping rod and can move relative to the second clamping rod; the outer contour of one end of the handle close to the rotating shaft is provided with a loosening surface and a clamping surface, the distance from the loosening surface to the center of the rotating shaft is smaller than the distance from the clamping surface to the center of the rotating shaft, and the loosening surface or the clamping surface is abutted to the floating clamp when the handle rotates; a limiting mechanism is arranged between the floating clamp and the handle, and limits the position of the floating clamp relative to the handle, so that the floating clamp does not expose a clamping surface or a loose surface, and the clamping surface or the loose surface is not independently and directly opposite to the first clamping rod. The clamping tool provided by the invention avoids the situation that the handle and the first clamping rod directly clamp the workpiece, prevents the clamping tool from being difficult to unload force, and improves the usability.

Description

Clamping tool

Technical Field

The present invention relates to a clamping tool, and more particularly, to a clamping tool for clamping a workpiece.

Background

Currently, a wide variety of clamping tools for holding workpieces during machine operations are available, one of which is a cam-type clamping tool. The cam type clamping tool is used for clamping a workpiece by abutting the floating clamp by utilizing the outer contour with different radiuses on the handle so that the floating clamp moves towards the fixed clamp. When an operator uses the clamping tool, the floating clamp is deviated from a proper position sometimes due to misoperation or misoperation, as shown in fig. 7, the outer contour of the handle is directly abutted against a workpiece, and the floating clamp is not arranged between the outer contour of the handle and the workpiece. The outer contour of the handle has no space for vertical movement, so that the workpiece is difficult to remove by the unloading force after being clamped, and the clamping tool is damaged by the brute force operation.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a clamping tool which is simple in structure and not easy to operate mistakenly, so that the defects of the prior art are overcome.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows:

a clamping tool comprising: the device comprises a supporting rod, a first clamping rod fixedly arranged on the supporting rod, a second clamping rod with one end movably arranged on the supporting rod, a rotating shaft connected to the other end of the second clamping rod, a handle which is pivotally connected to the rotating shaft and can rotate relative to the second clamping rod, and a floating clamp which is connected to the second clamping rod and can move relative to the second clamping rod;

the outer contour of one end of the handle close to the rotating shaft is provided with a loosening surface and a clamping surface, the distance from the loosening surface to the center of the rotating shaft is smaller than the distance from the clamping surface to the center of the rotating shaft, and when the handle rotates, the loosening surface or the clamping surface is abutted to the floating clamp;

a limiting mechanism is arranged between the floating clamp and the handle, and the limiting mechanism can limit the position of the floating clamp relative to the handle, so that the floating clamp does not expose a clamping surface or a loose surface, and the clamping surface or the loose surface is not independently and directly opposite to the first clamping rod.

Compared with the prior art, the clamping tool provided by the invention has the advantages that the limiting mechanism is additionally arranged between the floating clamp and the handle to limit the floating clamp to move in a certain area relative to the handle, the wrong operation that the loose surface and the clamping surface of the handle are directly abutted against the first clamping rod or a workpiece is directly clamped is avoided, the situation that the clamping tool is not easy to unload is avoided, and the operation easiness is improved.

In one embodiment, the stop mechanism may limit the floating clamp from being located in the area between the slack or clamping surface and the first clamp bar.

In one embodiment, the first clamping rod is provided with a first clamping plane, the floating clamp is provided with a floating clamping plane on the side opposite to the first clamping rod, and the limiting mechanism limits the position of the floating clamping plane relative to the loosening plane or the clamping plane.

In one embodiment, the limiting mechanism includes a first limiting member disposed on the floating clip and a second limiting member disposed on the handle and corresponding to the first limiting member, and when the first limiting member and the second limiting member abut against each other, the limiting mechanism can limit the position of the floating clip relative to the handle.

In one embodiment, the first retaining member is one of a protrusion and a groove, the second retaining member is the other of the protrusion and the groove, and the floating clip is retained when an edge of the protrusion and a sidewall of the groove abut against each other.

In one embodiment, the floating clamp is coupled to the pivot shaft, and the movement of the floating clamp relative to the second clamp bar includes sliding movement toward or away from the first clamp bar and pivoting movement about the pivot shaft.

In one embodiment, the floating clamp plane can abut against the handle, and the limiting mechanism is used for limiting the position of the floating clamp relative to the handle.

In one embodiment, the floating clamp plane can abut the second clamp bar, limiting the position of the floating clamp relative to the handle.

In one embodiment, the floating fixture has a kidney-shaped hole that mates with the rotating shaft.

In one embodiment, when the loose surface of the handle abuts against the floating clamp, the handle is rotated to enable the clamping surface to abut against the floating clamp, and the floating clamp is driven to move close to the first clamping rod and slide relative to the rotating shaft; when the clamping surface of the handle abuts against the floating clamp, the handle is rotated to enable the loosening surface to abut against the floating clamp, and the floating clamp moves away from the first clamping rod and slides relative to the rotating shaft.

Drawings

The above objects, technical solutions and advantages of the present invention can be achieved by the following drawings.

Fig. 1 is a schematic view of a floating clamp of a clamping tool in a first state of rotation.

Fig. 2 is a schematic view of the working state of the clamping tool.

Fig. 3 is a schematic view of the floating clamp of the clamping tool in a second state.

FIG. 4 is a view of the position of the floating clamp and handle when the clamping tool is unclamped.

FIG. 5 is a view showing the positional relationship of the floating clamp and the handle when the clamping tool is clamped.

Fig. 6 is an exploded view of the handle and floating clip in a first rotated state.

Fig. 7 is a schematic illustration of possible positions of a floating clamp of a prior art clamping tool.

Detailed Description

As shown in fig. 2, 4 and 5, the clamping tool 10 includes a support rod 100, a first clamping bar 200 fixedly disposed on the support rod 100, and a second clamping bar 300 having one end movably disposed on the support rod 100 and corresponding to the first clamping bar 200. The movable here includes sliding or rotating in a certain direction, etc. A rotation shaft 600 is coupled to the other end of the second clamping bar 300, and a handle 400 pivotally coupled to the rotation shaft 600 and rotatable with respect to the second clamping bar 300. A floating clip 500 is further coupled to the other end of the second clamping bar 300, and the floating clip 500 can move toward the first clamping bar 200 with respect to the second clamping bar 300. Specifically, the floating clamp 500 has a kidney-shaped hole 510, and the kidney-shaped hole 510 is coupled to the rotating shaft 600, so that the rotating shaft 600 reciprocates in the kidney-shaped hole 510, and the floating clamp 500 moves toward the first clamping bar 200 with respect to the rotating shaft 600.

As shown in fig. 4 and 5, the handle 400 has a loosening surface 420 and a clamping surface 430 on the outer contour near one end of the rotating shaft 600, wherein the distance L1 from the loosening surface 420 to the center of the rotating shaft is smaller than the distance L2 from the clamping surface 430 to the center of the rotating shaft 600, and when the handle is rotated, the loosening surface 420 or the clamping surface 430 abuts against the floating clamp 500, so that the floating clamp 500 moves relative to the rotating shaft 600 and also moves relative to the first clamping bar 200. As shown in fig. 4. The loosening surface 420 and the clamping surface 430 may be formed by a transition of an arc surface, an involute curved surface, and the like, so as to facilitate a smooth transition when the handle 400 abuts against the floating clamping surface 520, and in other embodiments, the transition between the loosening surface 420 and the clamping surface 430 may also be designed in other curved surface forms, so as to allow other intermediate abutting states or other transition fit forms to occur therebetween, so that between the two positions, other abutting states of the handle 400 and the floating clamp 500 are allowed to occur, and other functional abutting purposes are achieved.

During operation of clamping a workpiece, the loose surface 420 of the handle 400 is first brought into abutment with the floating clamp 500, the workpiece is placed between the first clamping bar 200 and the floating clamp 500 and contacts the first clamping bar 200, and the second clamping bar 300 is moved so that the floating clamp 500 approaches and contacts or is about to contact the workpiece. At this time, the handle 400 is rotated toward the direction approaching the support rod 100, so that the abutment position of the handle 400 with the floating clip 500 is transited from the loosening surface 420 to the clamping surface 430 until the clamping surface 430 abuts against the floating clip 500, and in this process, the floating clip 500 is urged by the outer contour abutment of the handle to move in a direction away from the rotation shaft 600, that is, toward the first clip lever 200, so as to abut against the workpiece placed between the first clip lever 200 and the floating clip 500. At this time, the workpiece will generate a reaction force on the end of the second clamping bar 300 where the rotating shaft 600 is disposed, so that the end of the second clamping bar 300 disposed on the supporting rod 100 and the supporting rod 100 deflect relatively, and the contacting portion of the two generates a butt joint, and the friction force generated by the butt joint prevents the second clamping bar 300 from moving away from the first clamping bar 200, so that the workpiece is clamped. Preferably, in order to increase the friction force, serrations, frosting, and a one-way ratchet structure may be provided on the contact surface of the second clamping bar 300 and the supporting bar 100 to further limit the movement of the first clamping bar 200 away from the second clamping bar 300. An additional fixing structure may be provided at the contact position of the second clamping bar 200 and the supporting bar 100 to fix the position of the second clamping bar 200 relative to the supporting bar 100 at one time.

During a work-piece releasing operation, the handle 400 is rotated in the opposite direction, and the floating clamp 500 moves in the opposite direction away from the first clamp bar 200.

In order to make the clamping more stable, the first clamping plane 210 is provided on the first clamping bar 200, and the floating clamping plane 520 is provided on the floating clamp 500 at a side opposite to the first clamping bar 200. When the handle 400 is rotated, the gripping surface 430 or the loosening surface 420 abuts on the floating gripping plane 520.

Since the floating clamp 500 is movably connected to the handle 400, the loosening surface 420 and the clamping surface 430 of the handle are directly abutted to the workpiece or the first clamping bar 200 when the operator is in misoperation or improper operation, and since the clamping surface 430 does not have a sliding space far away from the first clamping bar 200, it is very laborious to rotate the handle to disassemble the workpiece. Therefore, the floating clamp 500 needs to be located in an area between the relaxing surface 420 or the clamping surface 430 and the first clamping bar 200, preventing the relaxing surface 420 or the clamping surface 430 from directly opposing the first clamping bar 200 or the workpiece independently.

The clamping surface 430 is independently and directly opposite to the first clamping bar 200 or the workpiece, which means that the clamping surface 430 is directly clamped on the first clamping bar 200 or the workpiece through the clamping operation without a floating clamp (500) therebetween, so that the force is difficult to unload; the slack surface 420 is independently directly opposite the first clamping bar 200 or the workpiece, meaning that the slack surface 420 is in direct contact with the first clamping bar 200 or the workpiece without a floating clamp (500) therebetween, which may damage the clamping tool if the clamping operation described above is performed, or may cause the clamping surface 430 to be independently directly opposite the first clamping bar 200 or the workpiece.

In order to prevent the loosening surface 420 or the clamping surface 430 from directly opposing the first clamping bar 200 or the workpiece independently, a limiting mechanism is provided between the floating clamp 500 and the handle 400 to limit the position of the floating clamp 500 relative to the handle 400 and the second clamping bar 300, so that the floating clamp 500 is always in the area between the loosening surface 420 or the clamping surface 430 and the first clamping bar 200. Since the handle 400 is also movable, the positions of the loosening surface 420 and the clamping surface 430 are changed, so that the area is not fixed, and is changed along with the position change of the handle 400, but as long as the floating clamp 500 is located in the area, the floating clamp 500 is prevented from directly exposing the loosening surface 420 and the clamping surface 430 of the handle 400, and the clamping surface 420 is directly abutted against the workpiece or the first clamping rod. This area is also related to the shape, size and motion trajectory of the floating clamp.

Referring to fig. 1 and 6, the limiting mechanism includes a first limiting member 550 disposed on the floating clip and a second limiting member 450 disposed on the handle corresponding to the first limiting member 550. In order to keep the floating clip (500) always located in the region between the loosening surface (420) or the clamping surface (430) and the first clip lever (200), when the floating clip (500) moves to the vicinity of the boundary of the region, the first stopper (550) and the second stopper (450) abut against each other, and the movement of the floating clip (500) with respect to the handle (400) is restricted.

When the floating clamp 500 is moved to a position adjacent to the boundary of the area, the floating clamp plane 520 abuts the outside of the handle 400, as shown in fig. 1, and limits the position of the floating clamp 500 relative to the handle 400 in cooperation with the above-described limiting mechanism.

Referring to fig. 2, 4 and 5, during the process of clamping and releasing the workpiece, the first limiting member 550 and the second limiting member 450 abut against each other to limit the movement of the floating clamp 500, so that the floating clamp 500 is kept stable and convenient to operate.

As shown in fig. 3, although the first limiting member 550 and the second limiting member 450 do not abut against each other, the floating clamping plane 520 abuts against the second clamping bar 300, and the position of the floating clamp 500 relative to the handle 400 can be limited, so as to prevent the loosening surface 420 or the clamping surface 430 from independently contacting the first clamping bar 200.

The first limiting member 550 and the second limiting member 450 may be a protrusion and a groove, and edges of the protrusion and the groove abut against each other to limit the position of the floating clip 500 relative to the handle 400. Alternatively, the roller may be a ball and slot that are engaged when the roller moves to the edge of the slot to limit the position of the floating clip 500 relative to the handle 400. The locking may be triggered, for example, a spring is used to abut against the ball on the floating clip, the ball is abutted against the concave pit when moving to the concave pit on the handle, the floating clip 500 is locked to move relative to the handle 400, and a pressing type unlocking device is additionally provided to lock the locking by contact. Or two wedge members that can abut each other, not all of which are listed here.

As shown in fig. 1 and 6, the first limiting member 550 is a protrusion disposed on the floating clip 500, the second limiting member 450 is a groove disposed at an end of the handle 400 close to the rotating shaft 600, and edges of the first limiting member 550 and the second limiting member 450, that is, edges of the protrusion and sidewalls of the groove abut against each other, so that the floating clip 500 cannot move beyond the region.

As shown in fig. 6, two sides of the handle 400 are respectively provided with a groove, and correspondingly, two side walls of the floating clamp 500 are also respectively provided with a protrusion, and the side walls of the grooves can be arc-shaped, curved or zigzag. In other embodiments, the protrusion may be provided on the handle and the recess may be provided on the floating clip.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A clamping tool comprising: the device comprises a support rod (100), a first clamping rod (200) fixedly arranged on the support rod (100), a second clamping rod (300) with one end movably arranged on the support rod (100), a rotating shaft (600) connected to the other end of the second clamping rod (300), a handle (400) which is pivotally connected to the rotating shaft (600) and can rotate relative to the second clamping rod (300), and a floating clamp (500) which is connected to the second clamping rod (300) and can move relative to the second clamping rod (300);

the outer contour of one end of the handle (400) close to the rotating shaft (600) is provided with a loosening surface (420) and a clamping surface (430), the distance from the loosening surface (420) to the center of the rotating shaft (600) is smaller than the distance from the clamping surface (430) to the center of the rotating shaft (600), and when the handle (400) rotates, the loosening surface (420) or the clamping surface (430) abuts against the floating clamp (500);

the floating clamp is characterized in that a limiting mechanism is arranged between the floating clamp (500) and the handle (400), the limiting mechanism can limit the position of the floating clamp (500) relative to the handle (400), so that the floating clamp (500) does not expose a clamping surface (430) or a loosening surface (420), and the clamping surface (430) or the loosening surface (420) is not independently and directly opposite to the first clamping rod (200).

2. The clamping tool as claimed in claim 1, wherein said limiting mechanism limits the floating clamp (500) to a region between said slack surface (420) or clamping surface (430) and said first clamping bar (200).

3. The clamping tool as claimed in claim 1, wherein said first clamping bar (200) has a first clamping flat surface (210) thereon, said floating clamp (500) has a floating clamping flat surface (520) thereon on a side opposite to said first clamping bar (200), and said limiting mechanism limits a position of said floating clamping flat surface (520) with respect to said slack surface (420) or clamping surface (430).

4. The clamping tool according to claim 1, wherein the limiting mechanism comprises a first limiting member (550) disposed on the floating clamp and a second limiting member (450) disposed on the handle (400) and corresponding to the first limiting member (550), and the limiting mechanism can limit the position of the floating clamp (500) relative to the handle (400) when the first limiting member (550) and the second limiting member (450) abut against each other.

5. The clamping tool as recited in claim 4, characterized in that said first stop (550) is one of a protrusion and a groove and said second stop (450) is the other of a protrusion and a groove, said floating clamp (500) being restrained when an edge of the protrusion and a sidewall of the groove abut each other.

6. The clamping tool as claimed in claim 1, wherein said floating clamp (500) is coupled to said rotating shaft (600), and wherein said movement of said floating clamp (500) relative to said second clamping bar (300) comprises sliding in a direction toward or away from said first clamping bar (200) and rotating about said rotating shaft (600).

7. The clamping tool as claimed in claim 6, wherein a side of the floating clamp plane (520) facing away from the support bar may abut the handle (400) limiting the position of the floating clamp (500) relative to the handle (400).

8. The clamping tool as claimed in claim 6, wherein a side of the floating clamping plane (520) adjacent to the support bar may abut the second clamping bar (300) limiting the position of the floating clamp (500) relative to the handle (400).

9. The clamping tool as claimed in claim 6, wherein said floating clamp (500) has a kidney-shaped hole (510), said kidney-shaped hole (510) being mated with said rotating shaft (600).

10. The clamping tool as claimed in claim 6, wherein when the slack side (420) of the handle abuts on the floating clamp (500), rotating the handle (400) causes the clamping surface (430) to abut on the floating clamp (500), causing the floating clamp (500) to move closer to the first clamp bar (200) and slide relative to the rotation shaft (600);

when the clamping surface (430) of the handle abuts on the floating clamp (500), the handle (400) is rotated to enable the loosening surface (420) to abut on the floating clamp (500), and the floating clamp (500) moves away from the first clamping rod (200) and slides relative to the rotating shaft (600).

Images