TWM649627U - Improved fixture - Google Patents

Abstract

The new model is an improved clamp, which includes a positioning component and a clamping component. The clamping component includes a sliding seat, a setting seat, a handle, a locking group, a clamping part and a swing arm. The sliding seat is slidingly combined with the positioning component, and the setting seat It is detachably combined with the sliding seat and has a clamp hole running through it. The handle can be pivoted on the setting base. The clamping piece passes through the clamp hole. The two ends of the swing arm are respectively pivoted to the handle and the movable pivoting clamping piece. ; When the clamping part is caught with the edge of the clamp hole by the reaction force of the workpiece, the cam part is pressed against the clamping part when the swing arm swings, forcing the clamping part to continue moving and clamping and fixing the workpiece to the work piece. The handle can continue to pivot to the locking position and be fixed by the locking group. Therefore, even if the slide seat and the worktable are not completely parallel due to tolerances, the new model can still clamp the workpiece stably.

Description

Improved fixture

The present invention relates to a clamp, in particular to an improved clamp that can stably press and clamp a workpiece.

Clamps are widely used in different fields to fix two different objects relative to each other. In the field of woodworking, clamps are used to fix a wooden workpiece on a workbench for processing. Existing woodworking clamps include positioning components and clamping components. The positioning component enables the woodworking fixture to be positioned on the workbench, and the clamping component can press the wooden workpiece against the workbench and fix it relative to the workbench. The clamping component includes a slide seat and a handle located on the slide seat. The clamping part and the locking group are slid along the positioning assembly through the sliding seat to a position approximately corresponding to the height of the workpiece and then fixed. The operating handle is then pivoted relative to the sliding seat to drive the clamping part to move vertically downward relative to the sliding seat. To clamp the workpiece, when the handle pivots to a locking position, the locking group can be used to lock the handle in the aforementioned locking position, so that the clamping part can withstand the reaction force of the workpiece and continue to clamp and fix the wooden workpiece; however, Existing woodworking clamps include the following shortcomings.

First of all, the structure of the slide seat of the existing woodworking clamp generally includes a sleeve part that is sleeved with a positioning component to achieve a sliding effect, and an extension arm extending from the sleeve part. The end of the extension arm away from the sleeve part is correspondingly installed with a handle, Structural design of clamping parts, locking groups and other components. If you want to use air pressure clamps for clamping on existing woodworking fixtures, you will need to open a new mold and manufacture a new slide seat to install the air pressure clamps, which will incur additional costs.

In addition, because the slide seat and the workbench are usually not completely parallel (i.e. have relative inclination angles) due to factors such as manufacturing tolerances and fit tolerances, the direction in which the clamping part moves vertically downward relative to the slide seat is not consistent with the workpiece on the workbench. Vertical, when the handle is turned to move the clamping part downward relative to the sliding seat and press against the workpiece, the reaction force caused by the workpiece will be inclined relative to the downward movement direction of the clamping part. The reaction force is perpendicular to the downward movement direction of the clamping part. The component force in the direction will cause the clamping part to be stuck with the slide seat and unable to move downward relative to the slide seat. As a result, the handle cannot continue to pivot to the locking position for locking, and the workpiece may still become loose.

In order to solve the problems existing in the manufacture and use of the slide seat of the existing woodworking clamp, the purpose of the present invention is to propose a slide seat with a mounting platform and a setting base combined with the mounting platform, so that other components of the clamping assembly can be An improved clamp is provided with a base and presses the clamping part through the cam part, forcing the clamping part to move when it is locked, so that the handle can be pivoted to the locking position for locking.

The improved fixture proposed by this new model to solve the technical problem includes: a positioning component; and a clamping assembly containing A sliding seat, which is slidingly coupled to the positioning component and provided with an installation platform; A mounting base, which is detachably coupled to the mounting platform of the sliding seat, and has a clamp hole running through it along a consistent direction; A handle that can be pivoted on the setting base; A locking group that can fix the handle to or release the handle from the setting base; A clamping piece that passes through the clamping hole of the setting base; and A swing arm, one end of the swing arm is pivotally connected to the handle, the other end of the swing arm is movably pivotally connected to the clamping member, and is provided with at least one cam portion; Wherein, when the handle pivots, it can drive the swing arm to swing, and when the swing arm swings, the cam portion can press against the clamping member and move along the through direction, so that the handle can pivot to a position. The locking position is fixed on the setting base by the locking group.

In the improved clamp, the top of the clamping member is provided with a convex block and two abutting surfaces. The two abutting surfaces are respectively formed on both sides of the convex block. The swing arm includes two cam parts. The two cam parts can respectively abut against the two abutment surfaces.

The improved clamp, wherein the swing arm includes two swing members, each of the swing members includes a first end and a second end, and the first ends of the two swing members are in contact with each other and are pivotally connected to the The second end of the handle is bent and extended from the first end. The second ends of the two swinging parts are respectively abutted against the opposite sides of the projection of the clamping part. The two cam parts are respectively formed on The bottom edges of the second ends of the two swinging parts.

The improved clamp, wherein the top of the clamping member is provided with a pivot hole, the clamping component includes a pivot shaft, the pivot shaft passes through the swing arm and the pivot hole of the clamping member, and the pivot hole The bore diameter is slightly larger than the outer diameter of the pivot.

The improved clamp, wherein the slide base is provided with a screw hole, the setting base includes a coupling portion, the coupling portion is threadedly coupled to the screw hole of the slide base, and the clamp hole is provided through the coupling portion .

The improved clamp, wherein the setting base includes two parallel setting plates, the two setting plates are connected to the top of the joint part, the handle is pivotally connected to the two setting plates, and the handle is connected to the swing arm Located between the two setting boards.

The efficiency improvements that can be obtained by this new technical means are: 1. This new type of improved clamp adopts the form of a sliding base with a setting base. The mounting platform of the sliding base is used to install a detachable setting base, and the handle, locking group and other other clamping components are installed through the setting base. , if you want to use pneumatic clamps for clamping, you only need to remove the setting base, and you can use the mounting platform of the slide to install the pneumatic clamp. There is no need to manufacture a new slide corresponding to the pneumatic clamp, saving costs. 2. The new improved clamp is pivotally connected to the clamping part through the movement of the swing arm, and with the cam part on the swing arm, the clamping part receives the reaction force of the workpiece and is stuck with the clamp hole. When it is turned on, the handle can still be continuously rotated to drive the swing arm, so that the swing arm swings and at the same time presses the cam part against the clamping part, forcing the clamping part to move along the penetration direction to tighten the workpiece. On the workbench, the handle can be pivoted to the locking position and fixed by the locking group. Therefore, even if the slide seat and the workbench are not completely parallel due to tolerances, the new improved clamp can still clamp the workpiece stably. There will be no loosening.

In order to understand the technical characteristics and practical effects of the present invention in detail, and to realize it according to the content of the new model, the preferred embodiment as shown in the drawings is further described in detail as follows:

As shown in Figure 1, the improved clamp of the preferred embodiment of the present invention includes a positioning component 10 and a clamping component 20. The clamping component 20 is provided on the positioning component 10. As shown in Figure 3, the positioning component 10 is used to position the improved fixture on a workbench 90. As shown in FIG. 4, the clamping assembly 20 is used to press and clamp a workpiece 80 on the workbench 90.

As shown in Figure 2, the positioning component 10 includes a positioning block 11, a spindle 12, a movable seat 13 and a knob 14. The positioning block 11 can engage the positioning component 10 in the working position as shown in Figure 3. Table 90. Specifically, the worktable 90 is an aluminum extrusion, which includes a plurality of T-shaped slots 91 that are parallel and extend to opposite sides of the worktable 90. The positioning block 11 is a T-shaped Nuts can enter and exit one of the T-shaped slots 91 from opposite sides of the workbench 90 and move along the T-shaped slot 91 to determine the setting position of the positioning component 10. The bottom end of the spindle 12 Combined with the positioning block 11 with threads.

As shown in Figures 2 and 4, the movable seat 13 is sleeved on the spindle 12 and can rotate with the spindle 12 as the axis. The movable seat 13 specifically includes a seat tube 131 and a bottom plate 132. The bottom plate 132 allows The movable seat 13 can be stably installed on the upper surface of the workbench 90 . The seat tube 131 extends upright from the bottom plate 132 and surrounds the mandrel 12 . The clamping component 20 is located on the seat of the movable seat 13 The tube 131, as shown in Figure 4, can drive the clamping assembly 20 by rotating the movable seat 13, and move the clamping assembly 20 above the workpiece 80 for clamping.

As shown in Figures 2 and 4, the knob 14 is rotatably mounted on the top of the seat tube 131, and is threadedly coupled to the top of the spindle 12. By rotating the knob 14, the spindle 12 can be screwed together. The structure of the positioning block 11 is moved upward, so that the positioning block 11 is engaged in the T-shaped slot 91, thereby completing the positioning of the positioning component 10; in the preferred embodiment of the present invention, the positioning component 10 is connected to the positioning block 11 through the positioning block 11. The matching of the T-shaped groove 91, the screwing of the spindle 12, the positioning block 11, and the knob 14 complete the positioning effect. In other embodiments, the positioning component 10 can also be positioned using any existing clamp. The mechanism is not limited to the preferred embodiments of the present invention.

As shown in Figures 5 and 6, the clamping component 20 includes a sliding seat 21 and a setting base 22, a handle 23, a locking group 24, a clamping member 25 and a swing arm 26. The sliding seat 21 slides Combined with the seat tube 131 of the movable seat 13, specifically, the sliding seat 21 includes a mounting platform 210. The mounting platform 210 is provided with a set of holes 211, and the sliding seat 21 is sleeved on the seat tube 211 with the set of holes 211. The seat tube 131 allows the sliding seat 21 to slide along the seat tube 131 as shown in FIG. 6 , adjust the clamping assembly 20 to a height adjacent to the workpiece 80 , and then use a locking member 212 as shown in FIG. 6 The sliding base 21 is screwed through and tightly pressed against the seat tube 131 to lock the height position of the sliding base 21 .

As shown in FIGS. 5 and 6 , the setting base 22 is detachably coupled to the mounting platform 210 of the sliding seat 21 . Specifically, the setting base 22 includes a rod-shaped connecting portion 220 , and the outer periphery of the connecting portion 220 The surface is provided with external threads, and the mounting platform 210 of the sliding seat 21 is provided with a screw hole 213. The screw hole 213 and the set hole 211 are respectively close to the opposite ends of the mounting platform 210. The connecting portion 220 of the setting seat 22 Screwed into the screw hole 213; the setting base 22 includes a clamp hole 221, which runs through the joint portion 220 of the setting base 22 along the consistent direction D. The clamp hole 221 is for The clamping member 25 is inserted so that the clamping member 25 is limited by the clamp hole 221 and can only move along the penetration direction D. The handle 23 , the locking group 24 , the swing arm 26 and other components are installed on This is placed on the base 22.

Through the installation platform 210 detachably combined with the sliding seat 21 through the setting base 22, not only the handle 23, the locking group 24, the swing arm 26 and other components installed on the setting base 22 can be used for clamping operations, but also You can also choose to remove the setting base 22 and install other types of clamping fixtures, such as air pressure clamps, on the mounting platform 210 of the sliding seat 21 to clamp the workpiece; in the preferred embodiment of the present invention , the setting base 22 is coupled to the sliding base 21 using threads. In other embodiments, the setting base 22 can also be detachably coupled to the sliding base 21 using other fixing methods. In the preferred embodiment of the present invention, threading is used to The combined form facilitates assembly and disassembly, and facilitates the replacement and maintenance of components. In addition, the screw hole 213 also facilitates the installation of other types of clamps such as the aforementioned air pressure clamp on the installation platform 210.

As shown in FIGS. 5 to 7 , the handle 23 can be pivoted on the setting base 22 . Specifically, the setting base 22 includes two setting plates 222 , and the two setting plates 222 and the connecting portion 220 The top ends are connected, and the two setting plates 222 are parallel. The handle 23 is pivoted to the two setting plates 222 through a pivot axis, so that the handle 23 can pivot relative to the setting base 22 with the pivot axis as the axis, and The handle 23 is connected to the clamping member 25 through the swing arm 26. As shown in Figure 5 and Figure 6, the top end of the swing arm 26 is pivotally connected to the bottom end of the handle 23, and the bottom end of the swing arm 26 can Movably pivotally connected to the top of the clamping member 25. Specifically, the top of the clamping member 25 is provided with a pivot hole 271 for pivotally connecting the swing arm 26, and a pivot 272 passes through the swing arm. 26 and the pivot hole 271 are pivotally connected, wherein the diameter of the pivot hole 271 is slightly larger than the outer diameter of the pivot shaft 272, so the swing arm 26 and the clamping member 25 can move relative to each other.

As shown in FIG. 5 , the swing arm 26 is provided with at least one cam portion 261 , and the swing arm 26 can use the cam portion 261 to press against the clamping member 25 so that the clamping member 25 can stably hold the clamping member 25 . The workpiece 80 is clamped and fixed on the workbench 90; further, in the preferred embodiment of the present invention, the clamping member 25 is provided with a bump 251 and two resisting surfaces 252 on the top. 252 are respectively formed on both sides of the projection 251. The swing arm 26 is provided with two cam portions 261. When pressing against the clamping member 25, the two cam portions 261 respectively abut against the two resisting surfaces 252, so as to The two symmetrical cam portions 261 and the two symmetrical abutment surfaces 252 can ensure the stability when pressing the clamping member 25 and avoid deflection of the clamping member 25 caused by uneven force application.

As shown in Figure 5, in the preferred embodiment of the present invention, the swing arm 26 includes two swing members 260, each of the swing members 260 includes a first end 262 and a second end 263. The first end 262 of the member 260 is close to and pivotally connected to the handle 23. The second end 263 bends and extends from the first end 262. The two cams 261 are respectively formed between the two swinging members 260. The bottom edge of the second end portion 263, the second end portions 263 of the two swinging members 260 are pivotally connected to the convex block 251 and respectively abut against the opposite sides of the convex block 251, using the two swinging members 260 and the handle 23. The clamping member 25 is pivoted and has a compact and close-fitting structure to improve the structural strength and stability of the pivot.

After the clamping assembly 20 is adjusted to a height adjacent to the workpiece 80 and locked, the handle 23 is in an initial position as shown in FIG. 6 . At this time, the cam portion 261 of the swing arm 26 has not yet abutted against the workpiece 80 . When the bottom surface of the abutment surface 252 wants to fix the workpiece 80 shown in Figure 4, as shown in Figure 7, the operator operates the handle 23, pivots the handle 23 toward the left side of Figure 7, and engages the handle 23. The swing arm 26 pivotally connected to the handle 23 is driven to swing toward the right side in Figure 7 , thereby driving the clamping member 25 to move downward along the penetration direction D in Figure 7 , and the position shown in Figure 4 can be moved The workpiece 80 is gradually pressed against the workbench 90. The clamping member 25 specifically includes a straight rod and a pressing block. The pressing block is swingably coupled to the bottom end of the straight rod, thereby clamping The pressing piece 25 can stably press against the upper surface of the workpiece 80 with the pressing block.

Among them, the penetration direction D along which the clamping member 25 moves is not completely perpendicular to the horizontally arranged workpiece 80 due to various factors (for example, when the positioning assembly 10 is positioned on the workbench 90 The fitting tolerance of the clamping component 20 on the positioning component 10, or the manufacturing tolerance of the components of the positioning component 10 and the clamping component 20 themselves), therefore when the handle 23 is pivoted as shown in the figure When approaching a locking position as shown in 7, the reaction force exerted by the workpiece 80 on the clamping member 25 is inclined relative to the penetration direction D. Therefore, the component of the reaction force perpendicular to the penetration direction D will compress the clamping member 25. The member 25 is pressed toward the edge of the clamp hole 221 to create a blocking situation, which hinders the movement of the clamping member 25 along the penetration direction D and hinders the pivoting movement of the handle 23 to the locking position.

At this time, the swing arm 26 uses the cam portion 261 to press against the bottom surface of the abutment surface 252 of the clamping member 25, thereby resisting the clamping member 25. Therefore, when the operator continues to pivot the When the handle 23 is turned on, the cam portion 261 can be used to press against the clamping member 25 to exert thrust, forcing the clamping member 25 to continue to move along the penetration direction D to press against the workpiece 80 . Among them, due to the clamping force The swing arm 26 pivotally connected to the clamping member 25 can also move relative to the clamping member 25. The swing arm 26 can swing while the cam portion 261 continues to press against the clamping member 25, and will not be affected by the clamping member 25. The pressing of the cam portion 261 creates a locking effect, causing the swing arm 26 to be unable to swing. Therefore, the operator can continue to pivot the handle 23 to the locking position as shown in Figure 8, and through the The locking group 24 locks the handle 23 in the locking position, and with the cam portion 261 pressing against the clamping part 25, the clamping part 25 can stably clamp the workpiece 80 on the workbench. 90 without loosening at will.

As shown in Figures 5 and 6, in the preferred embodiment of the present invention, the locking group 24 for locking the handle 23 specifically includes a ratchet 241, a pawl 242 and a torsion spring 243. The ratchet 241 is fixed on The handle 23 is pivotally connected to the pivot axis of the setting base 22 , the pawl 242 is pivotally mounted on the handle 23 , and both ends of the torsion spring 243 are respectively combined with the pawl 242 and the handle 23 . When the handle 23 pivots relative to the setting base 22, the ratchet 242 is pulled by the elastic restoring force of the torsion spring 243 and moves together with the handle 23, thereby sequentially engaging different ratchet teeth on the ratchet 241 along the ratchet wheel 241. When the handle 23 approaches the locking position, the handle 23 can continue to pivot to the locking position through the structure of the cam portion 261 pressing against the clamping member 25, so that the ratchet 242 engages with the uppermost position of the ratchet wheel 241. The ratchet teeth at the end can lock the handle 23 in the locking position, and the ratchet 242 will not move between the two adjacent ratchet teeth on the ratchet wheel 241 without engaging, which can avoid the problem of being unable to lock. .

When the handle 23 is to be released, a force is applied to overcome the elastic restoring force of the torsion spring 243, causing the pawl 242 to pivot relative to the handle 23, thereby disengaging from the ratchet wheel 241, and the handle 23 can be loosened and pivoted. Return to the initial position shown in FIG. 6 , and then release the ratchet 242 , so that the ratchet 242 is driven by the elastic restoring force of the torsion spring 243 to re-engage the ratchet teeth at the front end of the ratchet wheel 241 .

The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Anyone with ordinary knowledge in the technical field may use the present invention without departing from the scope of the technical solutions proposed by the present invention. Equivalent embodiments with partial changes or modifications to the technical content disclosed in the new model, and which do not deviate from the technical solution content of the present new model, still fall within the scope of the technical solution of the present new model.

10: Positioning components 11: Positioning block 12: mandrel 13: Movable seat 131:Seat post 132: Base plate 14: Knob 20: Clamping components 21:Sliding seat 210:Installation platform 211:set hole 212:Lock parts 213:Screw hole 22: Setting base 220:joint part 221: Clamp hole 222: Setting board 23: handle 24:Lock group 241:ratchet 242: Pawl 243: Torsion spring 25: Clamping parts 251: Bump 252:Resistance surface 26:Swing arm 260:Swing piece 261: Cam part 262: first end 263:Second end 271: Pivot hole 272:Pivot 80:Artifact 90:Workbench 91:T-shaped slot D:Throughout direction

Figure 1 is a three-dimensional appearance view of the preferred embodiment of the present invention. Figure 2 is an exploded view of the positioning assembly according to the preferred embodiment of the present invention. Figures 3 and 4 are schematic diagrams of the use of the preferred embodiment of the present invention. Figure 5 is an exploded view of the clamping assembly according to the preferred embodiment of the present invention. Figures 6 to 8 are schematic diagrams of the operation of the clamping assembly according to the preferred embodiment of the present invention.

10: Positioning components

13: Movable seat

20: Clamping components

21:Sliding seat

210:Installation platform

212:Lock parts

22: Setting base

23: handle

24:Lock group

25: Clamping parts

26:Swing arm

Claims (6)

An improved fixture containing: a positioning component; and a clamping assembly containing A sliding seat, which is slidingly coupled to the positioning component and provided with an installation platform; A mounting base, which is detachably coupled to the mounting platform of the sliding seat, and has a clamp hole running through it along a consistent direction; A handle that can be pivoted on the setting base; A locking group that can fix the handle to or release the handle from the setting base; A clamping piece that passes through the clamping hole of the setting base; and A swing arm, one end of the swing arm is pivotally connected to the handle, the other end of the swing arm is movably pivotally connected to the clamping member, and is provided with at least one cam portion; Wherein, when the handle pivots, it can drive the swing arm to swing, and when the swing arm swings, the cam portion can press against the clamping member and move along the through direction, so that the handle can pivot to a position. The locking position is fixed on the setting base by the locking group. The improved clamp according to claim 1, wherein the top of the clamping member is provided with a convex block and two abutting surfaces, the two abutting surfaces are respectively formed on both sides of the convex block, and the swing arm includes two Cam portion, the two cam portions can respectively abut against the two resisting surfaces. The improved clamp according to claim 2, wherein the swing arm includes two swing members, each of the swing members includes a first end and a second end, and the first ends of the two swing members are in contact with each other. And is pivotally connected to the handle, the second end is bent and extended from the first end, the second ends of the two swinging parts are respectively abutted against the opposite sides of the convex block of the clamping part, and the two cams Parts are respectively formed on the bottom edges of the second ends of the two swinging parts. The improved clamp as described in claim 2, wherein a pivot hole is formed through the top of the clamping member, and the clamping component includes a pivot shaft that passes through the swing arm and the pivot hole of the clamping member, And the diameter of the pivot hole is slightly larger than the outer diameter of the pivot shaft. The improved clamp according to any one of claims 1 to 4, wherein the slide base is provided with a screw hole, the setting base includes a coupling portion, the coupling portion is threadedly coupled to the screw hole of the slide base, and The clamp hole penetrates the joint part. The improved clamp according to claim 5, wherein the setting base includes two parallel setting plates, the two setting plates are connected to the top of the joint part, the handle is pivotally connected to the two setting plates, and the handle is connected to the two setting plates. The swing arm is located between the two setting plates.

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