A woodworking clamp

Abstract

The present application discloses a woodworking clamp, comprising a profile clamp, a first chuck, and a second chuck, the first chuck and the second chuck being respectively located at opposite ends of the profile clamp along its long axis; the woodworking clamp also comprises at least one movable chuck, the at least one movable chuck being slidably connected to the upper surface of the profile clamp; a locking block being provided between the movable chuck and the upper surface of the profile clamp, the lower surface of the locking block being slidably connected to the upper surface of the profile clamp; the movable chuck comprising a force-applying device and a camshaft, the camshaft having at least one cam, the force-applying device being connected to the camshaft, and the force-applying device being capable of rotating along the central axis of the camshaft to drive the rotation of the camshaft so that the cam of the camshaft is pressed against the locking block, and the movable chuck is pressed and positioned against the upper surface of the profile clamp by the locking block, wherein the central axis of the camshaft is perpendicular to the long axis of the profile clamp. The woodworking clamp of the present application can solve the problem of clamping angle deviation.

Description

Technical Field

[0001] The present application relates to the technical field of clamps, and in particular to a woodworking clamp. Background Art

[0002] Woodworking clamps are commonly used devices for clamping on the workbench. The workpiece is positioned by the clamp to facilitate processing. In order to be suitable for workpieces of different lengths, clamps of different sizes are generally used.

[0003] In the prior art, there is a clamp capable of adjusting the clamping length, such as that shown in patent CN208744613. This clamp includes a clamp body, a fixed clamp head fixed to the clamp body, and a movable clamp head assembly movably connected to the clamp body and movable along the clamp body. The clamp body is composed of at least two spliced ​​sub-clamp bodies, which are connected by a clamp body connecting device. The clamp body is composed of at least two spliced ​​sub-clamp bodies. The splicing of the sub-clamp bodies can extend the overall length of the clamp body. After the sub-clamp bodies are spliced ​​together, the position of the fixed clamp head on the clamp body can be changed. In other words, when the movable clamp head assembly is stationary, the distance between the fixed clamp head and the movable clamp head assembly increases, thereby increasing the maximum clamping distance between the fixed clamp head and the movable clamp head assembly.

[0004] The movable chuck assembly includes a chuck mount assembled on the chuck body, a cam-type rotating clamping component mounted on the chuck mount, a handle for operating the rotating clamping component, and a movable chuck connected to the chuck mount. The cam-type rotating clamping component includes a clamping pad and a pin that engages with the clamping pad. The clamping pad is located in the middle of the chuck mount and has a guide hole. The chuck mount has a guide post that is inserted into the guide hole. Guided by the guide post and the guide hole, the clamping pad can move relative to the chuck mount. The bottom of the clamping pad has a groove that engages with a raised portion of the chuck body. The presence of the groove maximizes the thickness of the upper and lower portions of the clamping pad, allowing the clamping pad to contact the bottom of the guide portion.

[0005] After placing the workpiece on the upper surface of the clamp, the workpiece is clamped by moving the movable chuck assembly and the handle of the movable chuck assembly is rotated to fix the movable chuck assembly on the clamp. Since the force direction of the rotating handle always forms a certain angle with the length axis direction of the clamp, it means that the force is applied left and right relative to the length axis of the clamp, that is, the force direction of the rotating handle forms an angle with the straight line direction of the guide rail. In this way, after the workpiece is clamped on the clamping surface, it may cause the workpiece to deviate from the straight line direction of the guide rail, resulting in a clamping deflection angle, that is, there is an angle between the workpiece and the straight line direction of the guide rail, which makes it unsuitable for processing or inaccurate processing.

[0006] Therefore, technicians in this field are committed to developing a woodworking clamp to prevent the clamping surface from deviating from the straight line direction of the guide rail after clamping, causing the problem of clamping angle deviation. Summary of the Invention

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this application is the technical problem that the clamping surface deviates from the straight line direction of the guide rail after clamping.

[0008] One aspect of the present application provides a woodworking clamp, comprising a clamp body, a first clamp head, and a second clamp head, wherein the first clamp head and the second clamp head are respectively located at two ends of the clamp body along the long axis thereof;

[0009] The woodworking clamp further comprises at least one movable chuck, wherein the at least one movable chuck is slidably connected to the upper surface of the clamp body;

[0010] A locking block is provided between the movable clamp and the upper surface of the clamp body, and the lower surface of the locking block is slidably connected to the upper surface of the clamp body;

[0011] The movable chuck includes a force-applying device and a camshaft, the camshaft has at least one cam, the force-applying device is connected to the camshaft, and the force-applying device can rotate along the central axis of the camshaft to drive the camshaft to rotate so that the cam of the camshaft is pressed against the locking block, and the movable chuck is pressed and positioned on the upper surface of the chuck through the locking block, wherein the central axis of the camshaft is perpendicular to the long axis of the chuck.

[0012] Optionally, at least one of the first clamp and the second clamp is movably connected to the clamp body.

[0013] Optionally, the woodworking clamp also includes at least one connecting member, and the clamp body is provided with a plurality of connecting holes distributed along the long axis of the clamp body. When the first chuck and / or the second chuck moves to a predetermined position, the connecting member fixes the first chuck and / or the second chuck at the predetermined position through the connecting holes.

[0014] Optionally, the connecting member is a screw or a bolt.

[0015] Optionally, at least one of the first chuck and the second chuck is a fixed chuck fixedly connected to the chuck body.

[0016] Optionally, the clamp body is provided with a groove track along its long axis, the lower surface of the movable clamp is provided with a slide groove matching the groove track, and the movable clamp can slide back and forth on the upper surface of the clamp body through the groove track and the slide groove.

[0017] Optionally, the movable clamp further comprises a clamp block fixing frame, a first movable clamp block and a second movable clamp block;

[0018] The clamping block fixing frame is provided with slots at both ends along the long axis of the clamp body, and the first movable clamping block and the second movable clamping block are respectively inserted into the slots at both ends of the clamping block fixing frame, and the end side surfaces of the first movable clamping block and the second movable clamping block inserted into the slots of the clamping block fixing frame are clamping block push surfaces.

[0019] Optionally, the clamping body is provided with a groove-shaped track along its long axis, and the lower surfaces of the first movable clamping block and the second movable clamping block are both provided with sliding grooves that match the groove-shaped track.

[0020] Optionally, the middle of the camshaft is a first cam, and both sides are second cams, and the first cam is higher than the second cam;

[0021] The surface of the first cam contacts the upper surface of the locking block, and the surface of the second cam contacts the clamping block pushing surfaces of the first movable clamping block and the second movable clamping block respectively.

[0022] Optionally, the movable clamp further comprises a first clamp block pad and a second clamp block pad, wherein the first clamp block pad and the second clamp block pad are respectively connected to the outermost ends of the first movable clamp block and the second movable clamp block along the long axis of the clamp body.

[0023] Optionally, the clamping body is provided with a groove-shaped track along its long axis, and the lower surfaces of the first clamping block and the second clamping block are both provided with sliding grooves that match the groove-shaped track.

[0024] Optionally, the surfaces of the first movable clamp block and the second movable clamp block both have limiting ribs, and the limiting ribs are used to respectively limit the first movable clamp block and the second movable clamp block from being fully inserted into the slot hole of the clamp block fixing frame.

[0025] Optionally, the force applying device includes a handle and a shaft, the shaft passes through the central axis of the camshaft and is fixed to the camshaft, and the shaft is then fixed to the handle.

[0026] Optionally, the movable clamp has a limiting rib, and the force-applying device has a limiting groove that cooperates with the limiting rib, so that the force-applying device rotates to a predetermined position.

[0027] Optionally, the handle is connected to the shaft via a pin, a screw or a bolt.

[0028] Optionally, the lower surface of the locking block is fixedly connected to a locking washer, and the lower surface of the locking washer is slidably connected to the upper surface of the clamping body.

[0029] Optionally, the clamping body comprises two detachable sub-clamping bodies and a connecting piece connecting the two sub-clamping bodies, and the two sub-clamping bodies can be plugged into each other and overlap or partially overlap.

[0030] Alternatively, the camshaft may be a non-circular axle having at least one cam.

[0031] Optionally, the top end of the cam has a positioning surface that cooperates with the surface of the locking block.

[0032] Optionally, the positioning surface is a wave-shaped or arc-shaped positioning surface.

[0033] Optionally, the at least one movable chuck comprises a first movable chuck and a second movable chuck that are separated;

[0034] The first movable clamp includes a first cam shaft, a first handle and a third movable clamping block, the first cam shaft and the third movable clamping block are plugged and fixed along the long axis of the clamp body, and the first handle is connected to the first cam shaft;

[0035] The second movable clamp includes a second cam shaft, a second handle and a fourth movable clamping block, the second cam shaft and the fourth movable clamping block are plugged and fixed along the long axis of the clamp body, and the second handle is connected to the second cam shaft;

[0036] The force applying device includes the first handle provided on the first movable chuck and the second handle provided on the second movable chuck;

[0037] A first locking block is provided under the first camshaft, and a lower surface of the first locking block is in sliding contact with an upper surface of the clamping body;

[0038] A second locking block is provided under the second camshaft, and a lower surface of the second locking block is in sliding contact with an upper surface of the clamping body.

[0039] Optionally, the lower surfaces of the first locking block and the second locking block are respectively fixedly connected to locking washers, and the lower surfaces of the two locking washers are in sliding contact with the surface of the clamping body.

[0040] Optionally, the third movable clamp block is engaged with a third clamp block pad along the outer end of the long axis of the clamp body, and the fourth movable clamp block is engaged with a fourth clamp block pad along the outer end of the long axis of the clamp body, and the surfaces of the third movable clamp block and the fourth movable clamp block are respectively fixedly connected with limiting ribs.

[0041] Optionally, the clamp body has slide tracks on both sides along its long axis, the lower surfaces of the first camshaft and the third movable clamp block both have slide tracks that cooperate with the slide tracks of the clamp body, and the lower surfaces of the second camshaft and the fourth movable clamp block both have slide tracks that cooperate with the slide tracks of the clamp body.

[0042] Optionally, the first movable chuck further comprises a first pin shaft; the second movable chuck further comprises a second pin shaft;

[0043] The first handle is fixedly connected to the first pin shaft, and the surface of the first pin shaft is sleeved with the surface of the protruding shaft at one end of the first cam shaft;

[0044] The second handle is fixedly connected to the second pin shaft, and the surface of the second pin shaft is sleeved with the surface of the protruding shaft at one end of the second cam shaft.

[0045] Optionally, the first camshaft and the second camshaft have the same structure, a first cam is located in the middle of the first camshaft and the second camshaft, and second cams are located on both sides, and the first cam is higher than the second cam;

[0046] The surface of the first cam of the first cam shaft contacts the upper surface of the first locking block, and the surface of the second cam of the first cam shaft contacts the clamping block pushing surface of the third movable clamping block;

[0047] The surface of the first cam of the second cam shaft contacts the upper surface of the second locking block, and the surface of the second cam of the second cam shaft contacts the clamping block pushing surface of the fourth movable clamping block.

[0048] Beneficial effects:

[0049] When the movable chuck is fixed to the upper surface of the chuck, the direction of the force applied to the force-applying device is always parallel to the track, that is, the force is applied forward and backward relative to the long axis of the chuck, so there is no problem that the workpiece may deviate from the straight line direction of the guide rail, the problem of clamping angle deviation can be avoided, and the movable chuck is fixed to the upper surface of the chuck more firmly.

[0050] Moreover, a workpiece can be clamped between the first chuck and the first movable clamping block, and another workpiece can be clamped between the second chuck and the second movable clamping block, thereby achieving workpiece clamping on both sides.

[0051] The movable clamp is pressed against the surface of the clamp body by a force applying device, so that the positioning of the movable clamp is more stable.

[0052] Furthermore, after the operator places the workpiece, he or she only needs to push the force-applying device to clamp the workpiece, so the operation is simple and convenient.

[0053] The concept, specific structure and technical effects of this application will be further explained below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1A schematic diagram of a woodworking clamp proposed in an embodiment of the present application;

[0055] Figure 2 A woodworking clamp proposed in an embodiment of the present application Figure 1 Schematic diagram of the split structure of the movable chuck;

[0056] Figure 3 For the Figure 2 A schematic diagram of the three-dimensional structure of the clamping block fixing frame of the woodworking clamp shown;

[0057] Figure 4 for Figure 2 A schematic structural diagram of the first movable clamping block and the first clamping block pad in the woodworking clamp in one direction;

[0058] Figure 5 for Figure 2 A schematic structural diagram of the first movable clamping block and the first clamping block pad in the woodworking clamp in another direction;

[0059] Figure 6 for Figure 2 A schematic cross-sectional view of the camshaft in the woodworking fixture;

[0060] Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure of the camshaft in the woodworking fixture;

[0061] Figure 8 A woodworking clamp proposed in an embodiment of the present application Figure 1 Cross-sectional view in the AA direction;

[0062] Figure 9 A cross-sectional view of a woodworking clamp in the embodiment of the present application taken along the direction BB in FIG1 ;

[0063] Figure 10 A woodworking clamp proposed in an embodiment of the present application Figure 1 Schematic diagram of CC direction;

[0064] Figure 11 A woodworking clamp proposed in an embodiment of the present application Figure 1 Partial view of the movable chuck;

[0065] Figure 12 This is a structural schematic diagram of a woodworking clamp according to another embodiment of the present application;

[0066] Figure 13 for Figure 12 Schematic diagram of the force application state of the woodworking clamp shown;

[0067] Figure 14 for Figure 12Schematic diagram of the woodworking clamp in the unstressed state shown;

[0068] Figure 15 A schematic diagram of another double-sided camshaft of a woodworking clamp proposed in another embodiment of the present application;

[0069] Figure 16 This is a structural schematic diagram of a woodworking clamp according to another embodiment of the present application;

[0070] Figure 17 This is a structural schematic diagram of a woodworking clamp according to another embodiment of the present application;

[0071] Figure 18 A schematic diagram of another double-sided camshaft of a woodworking clamp proposed in another embodiment of the present application;

[0072] Figure 19 for Figure 16 Schematic diagram of the anatomy of a woodworking fixture is shown. DETAILED DESCRIPTION

[0073] The following describes several preferred embodiments of the present application with reference to the accompanying drawings to make its technical content clearer and easier to understand. The present application can be embodied in many different forms of embodiments, and the scope of protection of the present application is not limited to the embodiments mentioned herein.

[0074] In the drawings, components with identical structures are denoted by the same reference numerals, and components with similar structures or functions are denoted by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrary and are not limited by this application. For clarity, the thickness of components in some places in the drawings is appropriately exaggerated.

[0075] like Figure 1 As shown, it is a schematic diagram of the structure of a woodworking clamp according to an embodiment of the present application, wherein the woodworking clamp includes a profile clamp 1, a first clamp 2, a second clamp 2' and a movable clamp 3, wherein the profile clamp 1 is provided with a grooved track 5 along its long axis, for example, the profile clamp 1 is provided with a grooved track 5 on both sides of its long axis, the first clamp 2 and the second clamp 2' are respectively located at the two ends of the profile clamp 1 and serve as blocking members at both ends of the grooved track 5, and the movable clamp 3 can slide back and forth along the grooved track 5 and can be movably fixed to the grooved track 5.

[0076] In another embodiment of the present application, in order to be able to be used for clamping large-sized workpieces and to reduce the length occupied by the woodworking clamp when not in use, the profile clamp 1 may include two detachable sub-clamps and a connector 4 connecting the two sub-clamps. The two sub-clamps can be plugged into each other and overlap or overlap a portion. When the woodworking clamp needs to process a longer profile, at least one of the two sub-clamps can be stretched along the long axis direction of the profile clamp 1 to adapt to the corresponding workpiece size. The two sub-clamps are then fixed by the connector. The connector 4 can be a rivet, screw or bolt, so as to meet the needs of profiles of different lengths.

[0077] In another embodiment of the present application, at least one of the first clamp 2 and the second clamp 2 ′ is movably fixed to the profile clamp 1 , for example, by screws or bolts.

[0078] In another embodiment of the present application, at least one of the first clamp 2 and the second clamp 2 ′ is a fixed clamp, for example, fixed to the profile clamp body 1 by bolts, screws or welding.

[0079] In another embodiment of the present application, when the workpiece is placed on the profile clamp 1, the movable chuck 3 can be pushed to slide along the grooved track 5 and the workpiece can be clamped between one of the first chuck 2 and the second chuck 2' and the movable chuck 3, and then the movable chuck 3 is fixed to the profile clamp 1. After fixation, the operator can process the workpiece.

[0080] In another embodiment of the present application, there are two movable chucks 3, which respectively form a structure for clamping the workpiece with the first chuck 2 and the second chuck 2'. The two movable chucks 3 have the same structure. For the convenience of description, the subsequent embodiments are illustrated by taking one movable chuck 3 as an example.

[0081] Therefore, since the woodworking clamp of this embodiment is provided with the movable clamp 3 and the grooved track 5, the woodworking clamp can clamp workpieces of different sizes and can clamp two workpieces at both ends at the same time, which is simple and convenient to operate.

[0082] In another embodiment of the present application, the structure of the movable clamp 3 of the woodworking clamp can be as follows: Figure 2 As shown, Figure 1 The diagram shows the disassembled structure of the movable chuck of the woodworking clamp.

[0083] The movable clamp 3 includes a clamp fixing frame 31, a first movable clamp 32, a second movable clamp 32', a first clamp pad 33, a second clamp pad 33', a force applying device 34, a cam shaft 35 and a locking block 36, wherein the force applying device 34 includes a handle 340, a shaft 341 and a fixing member 342.

[0084] The profile clamp 1 is in the shape of an elongated strip, and the elongated direction of the profile clamp 1 is the long axis of the profile clamp 1. The profile clamp 1 is provided with the upwardly protruding grooved track 5 on both sides of its long axis, that is, the long axis of the profile clamp 1 is parallel to the grooved track 5. Along the long axis of the profile clamp 1 can also be called along the grooved track 5.

[0085] In another embodiment of the present application, the movable clamp 3 has a limiting rib, and the force-applying device 34 has a limiting groove that cooperates with the limiting rib, so that the force-applying device 34 rotates to a predetermined position.

[0086] In another embodiment of the present application, the grooved track 5 is in a T-shape or an inverted L-shape. For example, the profile clamp 1 and the grooved track 5 are integrally formed.

[0087] The first movable clamp block 32 and the second movable clamp block 32' are respectively connected to the two ends of the clamp block fixing frame 31 along the long axis of the profile clamp body 1; the first clamp block pad 33 and the second clamp block pad 33' are respectively connected to the outermost ends of the first movable clamp block 32 and the second movable clamp block 32' along the long axis of the profile clamp body 1; after the first movable clamp block 32, the second movable clamp block 32', the first clamp block pad 33 and the second clamp block pad 33' are connected, they are placed together on the grooved track 5 of the profile clamp body 1 and can slide back and forth along the grooved track 5 together.

[0088] The upper surface of the locking block 36 is a clamping push surface 361. The locking block 36 is placed on the lower surface of the clamping block fixing frame 31 and can contact the upper surface of the profile clamp 1. The cam shaft 35 is arranged in the clamping block fixing frame 31 and placed on the locking block 36, and the central axis of the cam shaft 35 is perpendicular to the groove track 5. The force-applying device 34 is connected to the cam shaft 35 and can rotate around the central axis of the cam shaft 35 to drive the cam shaft 35 to rotate. When the cam shaft 35 rotates so that its cam part presses on the upper surface of the locking block 36, the locking block 36 is pressed against the upper surface of the profile clamp 1, so that the movable clamp 3 is fixed to the upper surface of the profile clamp 1.

[0089] From the above description, it can be seen that when the movable chuck 3 is fixed to the upper surface of the profile clamp 1, the direction of the force applied to the force-applying device 34 is always parallel to the grooved track 5, so there is no problem that the workpiece may deviate from the straight direction of the guide rail, the problem of clamping angle deviation can be avoided, and the movable chuck 3 is fixed to the upper surface of the profile clamp 1 more firmly.

[0090] The structure of the clamping block fixing frame 31 can be as follows Figure 3 As shown, Figure 2 The structural diagram of the clamping block fixing frame of the woodworking clamp shown in FIG. 1 shows that the lower surface of the clamping block fixing frame 31 is provided with sliding grooves 311 that cooperate with the grooved rails 5 along both sides of the long axis of the profile clamp 1. For example, the lower surface of the clamping block fixing frame 31 is provided with slide plates 310 along both ends of the long axis of the profile clamp 1. The slide plates 310 are upwardly formed along both sides of the long axis of the profile clamp 1 to form the sliding grooves 311. The clamping block fixing frame 31 is provided with two slotted holes 312 along both ends of the long axis of the profile clamp 1. The clamping block fixing frame 31 is provided with fixing holes 313 on both sides of the long axis of the profile clamp 1, i.e., the line connecting the two fixing holes 313 is perpendicular to the long axis of the profile clamp 1.

[0091] The first movable clamp 32 and the second movable clamp 32' have the same structure, the first clamp block pad 33 and the second clamp block pad 33' have the same structure, and the combination method of the first movable clamp 32 and the first clamp block pad 33 is the same as the combination method of the second movable clamp 32' and the second clamp block pad 33'. For the sake of simplicity, the following will take the structure of the first movable clamp 32 and the first clamp block pad 33 and their combination method as an example for explanation.

[0092] like Figure 4 and Figure 5 ,for Figure 2 A schematic structural diagram of the first movable clamp and the first clamp pad in two different directions in the woodworking clamp, one end of the first movable clamp 32 is combined with the first clamp pad 33 by a snap, and the other end of the first movable clamp 32 is combined with the clamp fixing frame 31, for example, the other end of the first movable clamp 32 is inserted into the slot hole 312 at one end of the clamp fixing frame 31, and is fixedly combined with the slot hole 312, for example, pressed.

[0093] The end side surface where the first movable clamping block 32 is connected to the clamping block fixing frame 31 is a clamping block pushing surface 322 , and a limiting rib 323 is formed at the junction of the first movable clamping block 32 and the first clamping block pad 33 .

[0094] The lower surface of the first movable clamp 32 is provided with sliding grooves 321 that cooperate with the groove-shaped track 5 along both sides of the long axis of the profile clamp 1. The structure and formation method of the sliding groove 321 are the same as the sliding groove 311 on the lower surface of the clamp fixing frame 31, and will not be repeated here.

[0095] The force-applying device 34 includes a handle 340, a shaft 341, and a fixing member 342, wherein the fixing member 342 is a pin, screw, or bolt. The handle 340 can be N-shaped, an inverted L-shaped, or a straight line, and the bottom of the handle 340 has an axial hole that mates with the shaft 341. For example, the shaft 341 passes through the center axis of the camshaft 35 and is fixed to the camshaft 35, and then is fixed to the handle 340. For example, the shaft 341 can be non-circular, for example, the cross-sections of the shaft 341 and the shaft hole are both quadrilateral, such as a square. The shaft 341 can pass through the bottom axial hole of the handle 340 and be fixed to the shaft 341 by the fixing member 342. In another embodiment of the present application, the force-applying device 34 also includes a washer 343, which is inserted into the shaft 341 and then fixed to the handle 340 and the shaft 341 by the fixing member 342.

[0096] The camshaft 35 may be a non-circular wheel shaft having at least one cam, such as one, two or three cams. The top end of the cam has a positioning surface, which cooperates with the surface of the locking block 36. For example, the positioning surface and the surface of the locking block 36 are mutually cooperating wave shapes. In this embodiment, the camshaft 35 is described as having two cams, that is, the camshaft 35 is a double camshaft. The structure of the camshaft 35 can be as follows: Figure 6 and 7 The camshaft 35 is a double camshaft 35, the middle of the camshaft 35 is a first cam 35A, and the two sides are second cams 35B. The first cam 35A is higher than the second cam 35B. The top of the first cam 35A has a positioning surface 35A1, and the positioning surface 35A1 can also be an arc-shaped positioning surface.

[0097] The combination structure of the movable clamp 3 and the profile clamp 1 can be as follows Figure 8-10 As shown, combined Figure 2 , mainly as follows.

[0098] The first movable clamp block 32 and the second movable clamp block 32' are respectively connected to the two ends of the clamp block fixing frame 31 along the long axis of the profile clamp body 1, for example, inserted into the two slots 312 at both ends along the long axis of the profile clamp body 1; the first clamp block pad 33 and the second clamp block pad 33' are respectively clamped at the outermost ends of the first movable clamp block 32 and the second movable clamp block 32' along the long axis of the profile clamp body 1.

[0099] The lower surface of the clamping block fixing frame 31 has a concave receiving groove, which can accommodate the cam shaft 35. Under the cam shaft 35 is the locking block 36, which is placed on the upper surface of the profile clamp body 1.

[0100] The central axis of the camshaft 35 is perpendicular to the long axis of the profile clamp 1, that is, perpendicular to the groove track 5. The handle 340 of the force-applying device 34 is placed on one side or both sides along the central axis of the camshaft 35. The handle 340 of the force-applying device 34 first passes through the axial hole at the bottom of the handle 340 along the central axis of the camshaft 35, and then passes through the fixing holes 313 on both sides of the clamping block fixing frame 31 along the long axis of the profile clamp 1, and then the force-applying device 34 is fixed to the clamping block fixing frame 31 through the fixing part 342 of the force-applying device 34.

[0101] The end side surfaces of the first movable clamp block 32 and the second movable clamp block 32' inserted into the slot hole of the clamp block fixing frame 31 are clamp block push surfaces, and the surface of the second cam 35B can respectively contact the clamp block push surfaces of the first movable clamp block 32 and the second movable clamp block 32', and the surface of the first cam 35A contacts the upper surface of the locking block 36. The two ends of the rotating shaft 341 are fixedly connected to the force-applying device 34 through the fixing member 342. A limiting groove 344 is fixedly provided on the surface of the force-applying device 34, and the two limiting grooves 344 are symmetrically distributed with the axis of the force-applying device 34 as the center.

[0102] The second cam 35B contacts the block pushing surfaces of the first movable block 32 and the second movable block 32 ′ respectively, thereby pushing the first movable block 32 or the second movable block 32 ′ to move.

[0103] The second cams 35B are located on both sides of the camshaft 35. When the camshaft 35 rotates, the first cam 35A contacts the locking block 36 and presses the locking block 36 to achieve positioning of the first movable clamping block 32 and the second movable clamping block 32'.

[0104] In another embodiment of the present application, Figure 11As mentioned above, a locking washer 37 is further provided at the bottom of the locking block 36 to effectively increase the friction between the locking block 36 and the upper surface of the profile clamp 1 .

[0105] For example, the lower surface of the clamping block fixing frame 31 is slidably connected with the locking block 36, the upper surface of the locking block 36 extends into the inside of the clamping block fixing frame 3, and both sides of the locking block 36 are slidably connected to the groove track 5 of the profile clamp body 1, and the lower surface of the locking block 36 is fixedly connected to the locking gasket 37, and the lower surface of the locking gasket 37 is slidably connected to the upper surface of the profile clamp body 1, and the two ends of the clamping block fixing frame 31 are slidably connected to the first movable clamping block 32 and the second movable clamping block 32'. For example, the first movable clamping block 32 or the second movable clamping block 32' is symmetrically distributed with the axis of the clamping block fixing frame 31 as the center, and the first movable clamping block 32 is symmetrically distributed with the axis of the clamping block fixing frame 31 as the center. The surfaces of the clamp block 32 and the second movable clamp block 32' are both provided with sliding grooves on the surface of the clamp block fixing frame 31, and the sliding grooves are adapted to the groove-shaped tracks 5 on the surface of the profile clamp body 1. The surfaces of the first movable clamp block 32 and the second movable clamp block 32' are respectively clamped with the first clamp block pad 33 and the second clamp block pad 33'. The surfaces of the first movable clamp block 32 and the second movable clamp block 32' are fixedly connected to the limiting rib 323, and the limiting rib 323 can both block the surface of the clamp block fixing frame 31 and block the handle 340, that is, the limiting rib 323 cooperates with the limiting groove 344 to limit the handle 340.

[0106] The camshaft 35 is driven to rotate by the rotating shaft 341, and the rotating shaft 341 is connected to the force-applying device 34, that is, the camshaft 35 is rotated by pulling the force-applying device 34, thereby pushing the first movable clamp 32 or the second movable clamp 32' to clamp the workpiece between the first chuck 2 and the first movable clamp 32, or clamp the workpiece between the second chuck 2' and the second movable clamp 32'.

[0107] In another embodiment of the present application, the first cam 35A of the camshaft 35 has a positioning surface 35A1, which cooperates with the clamping push surface 361 of the locking block 36 for positioning when rotated to an appropriate position. For example, the positioning surface 35A1 and the clamping push surface 361 are arc-shaped positioning surfaces that engage with each other.

[0108] In another embodiment of the present application, Figure 2As shown, the sides of the first movable clamping block 32 and the second movable clamping block 32' are both provided with limiting ribs 323, and the limiting ribs 323 cooperate with the limiting grooves 344 of the force-applying device 34. When the force-applying device 34 is pulled to a certain position, the limiting grooves 344 cooperate with the limiting ribs 323, so that the force-applying device 34 is positioned to prevent over-rotation, and it is also convenient for the force-applying device 34 to maintain a certain height from the upper surface of the profile clamp 1, so that the force-applying device 34 is easy to hold by hand.

[0109] From the above description, it can be seen that when the movable chuck 3 is fixed to the upper surface of the profile clamp 1, the direction of the force applied to the force-applying device 34 is always parallel to the grooved track 5, so there is no problem that the workpiece may deviate from the straight direction of the guide rail, the problem of clamping angle deviation can be avoided, and the movable chuck 3 is fixed to the upper surface of the profile clamp 1 more firmly.

[0110] Moreover, a workpiece can be clamped between the first chuck 2 and the first movable clamping block 32 , and another workpiece can be clamped between the second chuck 2 ′ and the second movable clamping block 32 ′, thereby achieving workpiece clamping on both sides.

[0111] The movable clamp is pressed against the surface of the profile clamp 1 by the force applying device 34 , so that the positioning of the movable clamp 3 is more stable.

[0112] Furthermore, after placing the workpiece, the operator only needs to push the handle 340 of the force-applying device 34 to clamp the workpiece, so the operation is simple and convenient.

[0113] In another embodiment of the present application, at least one of the first chuck 2 and the second chuck 2' can be a movable chuck, for example, Figure 12-14 As shown, the first clamp 2 is taken as an example to be a movable clamp.

[0114] The first clamp 2 and the second clamp 2' are located at both ends of the profile clamp 1 along the long axis, for example, symmetrically distributed. The first clamp 2 is a variable clamp, and the first clamp 2 can be moved and positioned on the profile clamp 1. The positioning can be fixed by a connecting piece 21 or other button-type fixation. The second clamp 2' is fixed to the profile clamp 1 by screws or welding.

[0115] For example, corresponding to the first clamp 2, a plurality of connecting holes 11 distributed along the long axis of the profile clamp 1 are provided in the profile clamp 1. When the first clamp 2 moves to a predetermined position, the connecting member 21 fixes the first clamp 2 in the connecting hole 11 corresponding to the position, that is, the first clamp 2 is fixed at the predetermined position of the profile clamp 1.

[0116] In another embodiment of the present application, the connecting member 21 may be a screw or a bolt.

[0117] Figure 12-14 The other structures of the woodworking clamp shown are basically the same as those described above. Figure 1-8 The structure of the woodworking clamps described is basically the same and will not be repeated here.

[0118] In another embodiment of the present application, the first cam 35A of the camshaft 35 may also have two positioning surfaces, for example, Figure 15 As shown, the first cam 35A has a first positioning surface 351 and a second positioning surface 352. The first positioning surface 351 and the second positioning surface 352 can be wave-shaped or arc-shaped positioning surfaces. The structure and function of the first positioning surface 351 and the second positioning surface 352 are the same as those described above. Figure 1-8 The positioning surface 35A1 of the first cam 35A described above is the same and will not be repeated here.

[0119] Correspondingly, the upper surface of the locking block 36 also has a clamping push surface 361 that matches the positioning surfaces of the first positioning surface 351 and the second positioning surface 352 . The clamping push surface 361 is a wavy or arc-shaped surface.

[0120] In another embodiment of the present application, the grooved rail 5 is combined with any slide groove through a snap-on combination and can slide along the grooved rail 5. For example, the grooved rail 5 has a barb facing the upper surface of the profile clamp 1 or a flange parallel to the upper surface of the profile clamp 1, and the slide groove has a concave groove, and the barb and flange of the grooved rail 5 can be snapped into the concave groove of the slide groove.

[0121] When a workpiece is placed on the upper surface of the profile clamp 1, the first movable clamp 32 is moved to clamp the workpiece with the first clamp 2 at the end of the profile clamp 1, and the handle 340 is pushed along the long axis direction of the profile clamp 1 to rotate along the central axis of the cam shaft 35. The handle 340 drives the cam shaft 35 to rotate through the shaft 341 of the cam shaft 35. The second cam 35B of the cam shaft 35 first presses the first movable clamp 32 to press the workpiece between the first clamp 2 and the first movable clamp 32, and then presses the locking block 36 to the upper surface of the profile clamp 1 through the first cam 35A, so that the movable clamp 3 is fixed to the upper surface of the profile clamp 1.

[0122] In another embodiment of the present application, Figure 16-17As shown, it is a structural schematic diagram of a woodworking clamp of another embodiment of the present application, wherein the woodworking clamp includes a profile clamp body 40 and two separate movable clamps located on the upper surface of the profile clamp body 40, wherein the two separate movable clamps include a first movable clamp 41 and a second movable clamp 42.

[0123] The first movable chuck 41 and the second movable chuck 42 have identical structures. For example, the first movable chuck 41 includes a first cam shaft 13C, a first handle 1401, a third movable clamping block 411, and a third clamping block spacer 412. The second movable chuck 42 includes a second cam shaft 13D, a second handle 1402, a fourth movable clamping block 413, and a fourth clamping block spacer 414. The first handle 1401 of the first movable chuck 41 and the second handle 1402 of the second movable chuck 42 constitute the force-applying device.

[0124] The profile clamp 40 has sliding groove tracks 45 on both sides along its long axis.

[0125] The first camshaft 13C and the third movable clamp 411 are plugged and fixed along the long axis of the profile clamp 40, and the third clamp pad 412 is engaged with one end of the third movable clamp 411 along the long axis of the profile clamp 40. The lower surfaces of the first camshaft 13C and the third movable clamp 411 both have a slide groove that matches the slide groove track 45 of the profile clamp 40. The specific structure of the slide groove is the same as the aforementioned Figure 1-8 The chute structure described in the embodiment is the same and will not be described again here.

[0126] The second camshaft 13D and the fourth movable clamping block 413 are plugged and fixed along the long axis of the profile clamping body 40, and the fourth clamping block pad 414 is engaged with the outer end of the fourth movable clamping block 413 along the long axis of the profile clamping body 40. The lower surfaces of the second camshaft 13D and the fourth movable clamping block 413 both have a sliding groove that cooperates with the sliding groove track 45 of the profile clamping body 40. The specific structure of the sliding groove is the same as the aforementioned Figure 1-8 The chute structure described in the embodiment is the same and will not be described again here.

[0127] like Figure 18 As shown, the first camshaft 13C and the second camshaft 13D have equivalent and identical structures, and their structures may be the same as the structure of the camshaft 35 described in the previous embodiment.

[0128] like Figure 19 As shown, combined Figure 16 and 17The first handle 1401 can be in an N shape, an inverted L shape, or a straight line shape. The first handle 1401 is connected to one side or both sides of the central axis of the first cam shaft 13C, wherein the central axis of the first cam shaft 13C is perpendicular to the long axis of the profile clamp 40.

[0129] For example, Figure 19 As shown, the combination of the first camshaft 13C and the profile clamp 40 is similar to the above Figure 1-8 The combination of the cam shaft 35 and the profile clamp 1 described in the embodiment is the same.

[0130] For example, a first locking block 153 is provided under the first camshaft 13C, the lower surface of the first locking block 153 is in sliding contact with the upper surface of the profile clamp 40, and the surface of the first camshaft 13C is in contact with the upper surface of the first locking block 153. During the rotation of the first camshaft 13C, the cam of the first camshaft 13C is in contact with the first locking block 153 and then presses the first locking block 153 to realize the positioning of the first movable clamp 41.

[0131] In another embodiment of the present application, Figure 19 As mentioned above, a locking washer 154 is further provided at the bottom of the first locking block 153 , which effectively increases the friction between the first locking block 153 and the upper surface of the profile clamp 40 .

[0132] For example, the surface of the first camshaft 13C is slidingly connected to the first locking block 153, the upper surface of the first locking block 153 extends into the first camshaft 13C, both sides of the first locking block 153 are slidingly connected to the profile clamp 40, and the lower surface of the first locking block 153 is fixedly connected to the locking gasket 154, and the lower surface of the locking gasket 154 is in sliding contact with the surface of the profile clamp 40.

[0133] The lower surfaces of the first camshaft 13C and the third movable clamp 411 both have a slide groove 1301 that cooperates with the slide track 45 of the profile clamp 40. The slide groove 1301 is adapted to the groove track 45 on the surface of the profile clamp 40. The first camshaft 13C is clamped with the third movable clamp 411. The surface of the third movable clamp 411 is fixedly connected to a limiting rib. The limiting rib can block the surface of the first camshaft 13C and the first handle 1401, that is, limit the first handle 1401.

[0134] The first handle 1401 is fixedly connected to the first pin 1201, for example, by a bolt. The surface of the first pin 1201 is convex, and the surface of the first pin 1201 is sleeved with the protruding surface of one end of the first camshaft 13C.

[0135] In another embodiment of the present application, the bottom of the first handle 1401 has an axial hole that matches the axis of the first camshaft 13C. The axis of the first camshaft 13C is a non-circular axis. For example, the cross-sections of the axis of the first camshaft 13C and the axial hole are both quadrilaterals, such as squares. The axis of the first camshaft 13C can pass through the bottom axial hole of the first handle 1401, and the first handle 1401 and the axis of the first camshaft 13C can be fixed by a fixing member. The fixing member can be a screw or a bolt. In another embodiment of the present application, a gasket can be put on the axis of the first camshaft 13C, and then the first handle 1401 and the axis of the first camshaft 13C can be fixed by the fixing member.

[0136] When a workpiece is placed on the upper surface of the profile clamp 40, the first movable chuck 41 is moved to clamp the workpiece with the chuck at the end of the profile clamp 40, and the first handle 1401 is pushed along the long axis direction of the profile clamp 40 to rotate along the central axis of the first cam shaft 13C. The first handle 1401 drives the first cam shaft 13C to rotate through the first pin shaft 1201 or the axis of the first cam shaft 13C. The cam of the first cam shaft 13C first presses the third movable clamp block 411 to press the workpiece between the chuck at the end of the profile clamp 40 and the third movable clamp block 411, and then presses the first locking block 153 on the upper surface of the profile clamp 40, so that the first movable chuck 41 is fixed to the upper surface of the profile clamp 40.

[0137] like Figure 19 As shown, combined Figure 16 and 17 The second handle 1402 can be in an N shape, an inverted L shape, or a straight line shape. The second handle 1402 is connected to one side or both sides of the central axis of the second cam shaft 13D, wherein the central axis of the second cam shaft 13D is perpendicular to the long axis of the profile clamp 40.

[0138] For example, Figure 19 As shown, the combination of the second camshaft 13D and the profile clamp 40 is similar to the above Figure 1-8 The combination of the cam shaft 35 and the profile clamp 1 described in the embodiment is the same.

[0139] The first camshaft 13C and the second camshaft 13D have the same structure, with the first cam in the middle of the first camshaft 13C and the second cam on both sides, and the first cam is higher than the second cam; the surface of the first cam of the first camshaft 13C contacts the upper surface of the first locking block 153, and the surface of the second cam of the first camshaft 13C contacts the clamping block push surface of the third movable clamping block 411; the surface of the first cam of the second camshaft 13D contacts the upper surface of the second locking block, and the surface of the second cam of the second camshaft 13D contacts the clamping block push surface of the fourth movable clamping block 413.

[0140] For example, the surface of the second camshaft 13D contacts the upper surface of the second locking block 153'. During the rotation of the second camshaft 13D, the cam of the second camshaft 13D contacts the second locking block 153' and then presses the second locking block 153' to achieve the positioning of the first movable clamp 41.

[0141] In another embodiment of the present application, a locking washer is further provided at the bottom of the second locking block 153 ′ to effectively increase the friction between the second locking block 153 ′ and the upper surface of the profile clamp 40 .

[0142] For example, the surface of the second camshaft 13D is slidingly connected to the second locking block 153', the upper surface of the second locking block 153' extends into the second camshaft 13D, both sides of the second locking block 153' are slidingly connected to the profile clamp 40, and the lower surface of the second locking block 153' is fixedly connected to the locking washer, and the surface of the locking washer is slidingly connected to the surface of the profile clamp 40.

[0143] The lower surfaces of the second camshaft 13D and the fourth movable clamp 413 both have a slide groove 1301 that cooperates with the slide groove track 45 of the profile clamp 40. The slide groove 1301 is adapted to the groove track 45 on the surface of the profile clamp 40. The second camshaft 13D is clamped with the fourth movable clamp 413. The surface of the fourth movable clamp 413 is fixedly connected to a limiting rib. The limiting rib can block the surface of the second camshaft 13D and the second handle 1402, that is, limit the second handle 1402.

[0144] In another embodiment of the present application, the groove rail 45 is combined with the slide groove 1301 through a snap-on combination and can slide along the groove rail 45. For example, the groove rail 45 has a barb facing the upper surface of the profile clamp 40 or a flange parallel to the upper surface of the profile clamp 40, and the slide groove 1301 has a concave groove. The barb and flange of the groove rail 45 can be snapped into the concave groove of the slide groove 1301.

[0145] The second handle 1402 is fixedly connected to the second pin 1202, for example, by a bolt. The surface of the second pin 1202 is convex, and the surface of the second pin 1202 is sleeved with the protruding surface of one end of the second camshaft 13D.

[0146] In another embodiment of the present application, the bottom of the second handle 1402 has an axial hole that matches the axis of the second camshaft 13D. The axis of the second camshaft 13D is a non-circular axis. For example, the cross-section of the axis of the second camshaft 13D and the axial hole are both quadrilaterals, such as squares. The axis of the second camshaft 13D can pass through the bottom axial hole of the second handle 1402, and the second handle 1402 and the axis of the second camshaft 13D can be fixed by a fixing member. The fixing member can be a screw or a bolt. In another embodiment of the present application, a gasket can be put on the axis of the second camshaft 13D, and then the second handle 1402 and the axis of the second camshaft 13D can be fixed by the fixing member.

[0147] When a workpiece is placed on the upper surface of the profile clamp 40, the first movable chuck 41 is moved to clamp the workpiece with the chuck at the end of the profile clamp 40, and the second handle 1402 is pushed along the long axis direction of the profile clamp 40 to rotate along the central axis of the second cam shaft 13D. The second handle 1402 drives the second cam shaft 13D to rotate through the second pin shaft 1202 or the axis of the second cam shaft 13D. The cam of the second cam shaft 13D first presses the fourth movable clamp block 413 to press the workpiece between the chuck at the end of the profile clamp 40 and the fourth movable clamp block 413, and then presses the second locking block 153' on the upper surface of the profile clamp 40, so that the first movable chuck 41 is fixed to the upper surface of the profile clamp 40.

[0148] The preferred embodiments of the present application have been described in detail above. It should be understood that numerous modifications and variations based on the concepts of the present application can be made by those skilled in the art without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present application through logical analysis, reasoning, or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A woodworking clamp, comprising a clamp body, a first clamp and a second clamp, wherein: The first chuck and the second chuck are respectively located at two ends of the chuck along the long axis thereof; It is characterized by: The woodworking clamp further comprises at least one movable chuck, wherein the at least one movable chuck is slidably connected to the clamp body; A locking block is provided between the movable clamp and the clamp body, and the locking block is slidably connected to the clamp body; The movable chuck includes a force-applying device, a camshaft, and a movable clamping block, wherein the camshaft has at least one cam, the force-applying device is connected to the camshaft, and the force-applying device can rotate along the central axis of the camshaft to drive the camshaft to rotate so that the cam of the camshaft is pressed against the locking block, and the movable chuck is pressed and positioned on the clamping body through the locking block, wherein the central axis of the camshaft is perpendicular to the long axis of the clamping body; The at least one cam includes a first cam and a second cam, and the top end of the first cam has a positioning surface that cooperates with the surface of the locking block; The middle of the camshaft is the first cam, and the two sides are the second cams, and the first cam is higher than the second cam; During the rotation of the camshaft, the second cam contacts the movable clamping block to push the movable clamping block to move, and the first cam contacts the locking block to press the locking block to achieve the positioning of the movable clamping block; When the movable clamp is fixed to the clamp body, the direction of the force applied to the force applying device is always parallel to the long axis of the clamp body.

2. The woodworking clamp according to claim 1, characterized in that: At least one of the first clamping head and the second clamping head is movably connected to the clamping body.

3. The woodworking clamp according to claim 2, characterized in that: The woodworking clamp also includes at least one connecting member, and the clamp body is provided with a plurality of connecting holes distributed along the long axis of the clamp body. When the first chuck and / or the second chuck moves to a predetermined position, the connecting member fixes the first chuck and / or the second chuck at the predetermined position through the connecting holes.

4. The woodworking clamp according to claim 1, wherein: The clamping body is provided with a groove track along its long axis, and the movable clamping head is provided with a slide groove matched with the groove track. The movable clamping head can slide back and forth on the clamping body through the groove track and the slide groove.

5. The woodworking clamp according to claim 1, wherein: The movable clamping head further comprises a clamping block fixing frame, and the movable clamping block comprises a first movable clamping block and a second movable clamping block; The clamping block fixing frame is provided with slots at both ends along the long axis of the clamping body, and the first movable clamping block and the second movable clamping block are respectively inserted into the slots at both ends of the clamping block fixing frame.

6. The woodworking clamp according to claim 5, characterized in that: The clamping body is provided with a groove-shaped track along its long axis, and the first movable clamping block and the second movable clamping block are both provided with a sliding groove that matches the groove-shaped track.

7. The woodworking clamp according to claim 5, characterized in that: The two second cams are in contact with the first movable clamping block and the second movable clamping block respectively.

8. The woodworking clamp according to claim 7, characterized in that: The clamping body is provided with a groove track along its long axis, and the movable clamping head further comprises a first clamping block pad and a second clamping block pad. The first clamping block pad and the second clamping block pad are both provided with a sliding groove that matches the groove track.

9. The woodworking clamp according to claim 5, characterized in that: The first movable clamping block and the second movable clamping block are both provided with limiting ribs, and the limiting ribs are used to respectively limit the first movable clamping block and the second movable clamping block from being fully inserted into the slot hole of the clamping block fixing frame.

10. The woodworking clamp according to claim 1, wherein: The movable clamp has a limiting rib, and the force applying device has a limiting groove matched with the limiting rib, so that the force applying device rotates to a predetermined position.

11. The woodworking clamp according to claim 1, wherein: The locking block is fixedly connected to the locking washer, and the locking washer is slidably connected to the clamping body.

12. The woodworking clamp according to claim 1, wherein: The clamping body comprises two detachable sub-clamping bodies and a connecting piece connecting the two sub-clamping bodies. The two sub-clamping bodies can be plugged into each other and overlap or partially overlap.

13. The woodworking clamp according to claim 1, wherein: The at least one movable chuck includes a first movable chuck and a second movable chuck that are separated; The force applying device includes a first handle provided on the first movable clamp and a second handle provided on the second movable clamp; The first movable clamp includes a first cam shaft and a third movable clamping block, the first cam shaft and the third movable clamping block are plugged and fixed along the long axis of the clamp body, and the first handle is connected to the first cam shaft; The second movable clamping head includes a second cam shaft and a fourth movable clamping block, the second cam shaft and the fourth movable clamping block are plugged and fixed along the long axis of the clamping body, and the second handle is connected to the second cam shaft; A first locking block is provided under the first camshaft, and the first locking block is in sliding contact with the clamping body; A second locking block is provided under the second camshaft, and the second locking block is in sliding contact with the clamping body.

14. The woodworking clamp according to claim 13, wherein: The first locking block and the second locking block are respectively fixedly connected to locking washers, and the two locking washers are in sliding contact with the clamping body.

15. The woodworking clamp according to claim 13, wherein: The third movable clamp is clamped with a third clamp pad at the outer end along the long axis of the clamp body, and the fourth movable clamp is clamped with a fourth clamp pad at the outer end along the long axis of the clamp body. The surfaces of the third movable clamp and the fourth movable clamp are respectively fixedly connected to limiting ribs.

16. The woodworking clamp according to claim 13, wherein: The clamping body has slide tracks on both sides along its long axis, the first camshaft and the third movable clamping block both have slide tracks that match the slide tracks of the clamping body, and the second camshaft and the fourth movable clamping block both have slide tracks that match the slide tracks of the clamping body.

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