A woodworking clamp

Abstract

The present invention relates to a woodworking clamp, comprising a movable clamp body and a fixed clamp body, one end of a round rod-shaped guide rod is fixedly installed on the movable clamp body, one end of a screw rod is rotatably inserted into a screw rod hole of the movable clamp body, and a lever is inserted into a light hole of the screw rod. The special feature of the clamp is that a nut insertion hole is provided on the fixed clamp body, and the nut is inserted into the nut insertion hole. The nut comprises a round rod-shaped nut body, a threaded hole is provided in the middle of the nut body, the axis of the threaded hole is perpendicular to the axis of the body, and the screw rod is threadedly connected with the nut; a fork-shaped locking arm is hingedly installed on the fixed clamp body, a nut top arm is provided at the end of the fork arm of the locking arm, and a ball head pressure plate is installed at the end of the fork handle; the fixed clamp body is sleeved on the column of the base; and the ball head of the ball head pressure plate rests on the column of the base. The rotation of the locking arm relies on the nut to transmit force, and when clamping a wood piece, the planes of the fixed jaw and the movable jaw are always in a parallel state, so that no damage is caused to the surface of the wood piece.

Description

Technical Field

[0001] The invention relates to a woodworking clamp, which belongs to the category of hardware tools, and aims to provide a clamp for woodworking operators that has both the traditional function of clamping wood pieces and the function of automatic locking of the base. Background Art

[0002] A woodworking clamp is a tool installed on a woodworking workbench to clamp wood pieces and perform various operations on them. The features of the existing woodworking clamp with an automatic locking function on the base are as follows: 1. The cross-section of the guide rod is rectangular and made of gray cast iron; 2. The locking principle of the base is that when the jaws of the woodworking clamp clamp the wood piece, the jaws of the movable jaw body are subjected to force, causing the jaw plane of the jaw body and the guide rod to tilt downward at the same time. As the guide rod tilts downward, the locking arm under the guide rod is pressed to rotate, thereby locking the base. Its defects are: 1. Since the cross-section of the guide rod is a rectangular structure, all four sides need to be processed, and the processing technology is poor; 2. The guide rod is made of gray cast iron. As a force-bearing part, cast iron is a brittle material, so the product structure size is large and it is easy to break when subjected to strong force; 3. The base can only be locked when the jaw plane is tilted. When clamping wood pieces, there will be indentations on the surface of the wood pieces because the fixed jaws and the movable jaws are not working in a parallel state; 4. When locking the base, the clamping part of the locking arm and the cylindrical part of the base is in point contact, so the clamping is not very reliable. Summary of the invention

[0003] The invention aims at solving the problems existing in the existing woodworking furniture and provides a woodworking clamp.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a woodworking clamp comprises a movable clamp body and a fixed clamp body, one end of a round rod-shaped guide rod is fixedly installed on the movable clamp body, the guide rod can be movably inserted in the fixed clamp body, one end of a screw rod can be rotatably inserted in the screw rod hole of the movable clamp body, a light hole is provided at the end of the screw rod passing through the movable clamp body, and the shift rod is inserted in the light hole of the screw rod. The special feature of the present invention is that a nut insertion hole is provided on the fixed clamp body, the nut is inserted in the nut insertion hole, the nut comprises a round rod-shaped nut body, a threaded hole is provided in the middle part of the nut body, the axis of the threaded hole is perpendicular to the axis of the body, and the screw rod is threadedly connected with the nut; a fork-shaped locking arm is hingedly installed on the fixed clamp body, a nut top arm is provided at the end of the fork arm of the locking arm, and a ball head pressure plate is installed at the end of the fork handle; the fixed clamp body is sleeved on the column of the base; the ball head of the ball head pressure plate rests on the column of the base.

[0005] On the basis of the above technical solution, in order to achieve the convenience of use and the stability of the equipment, the present invention can also make the following improvements to the above technical solution.

[0006] Furthermore, the nut top arm has a threaded inner cavity, the fastening screw is installed in the threaded inner cavity of the nut top arm, and the end of the fastening screw contacts the nut.

[0007] Furthermore, the fixed pliers body comprises an upper fixed pliers body, a fixed jaw is arranged on the upper edge of the front end of the upper fixed pliers body, the fixed jaw is plate-shaped, at least two fixed pliers body light holes are arranged on the upper fixed pliers body, the fixed pliers body light holes penetrate the upper fixed pliers body, a screw rod is inserted into one of the fixed pliers body light holes, and guide rods are inserted into the other fixed pliers body light holes, and the channel of the fixed pliers body light hole where the screw rod is inserted intersects vertically with the nut mounting hole.

[0008] Furthermore, a sleeve for fitting onto the base column is provided below the upper fixed clamp body, and a pressure plate groove is provided on the side wall of the sleeve.

[0009] Furthermore, column through holes are arranged on both sides of the pressure plate groove of the sleeve, and the centers of the two column through holes are on the same axis.

[0010] Furthermore, the upper fixed clamp body of the fixed clamp body is a box-type structure.

[0011] Furthermore, a long hole for inserting a screw rod and a nut top arm is opened in the middle of the side wall of the upper fixed pliers body for installing the fixed pliers.

[0012] Furthermore, threaded holes are arranged on both sides of the side walls of the upper fixed pliers body for installing the fixed jaws, and screws with cylindrical ends at the front end are installed in the threaded holes of the upper fixed pliers body. Hinge circular holes are arranged on both sides of the locking arm, and the cylindrical ends of the screws are inserted into the hinged circular holes of the locking arm.

[0013] Furthermore, the hinged circular hole of the locking arm is arranged on the fork arm.

[0014] Furthermore, a pressure plate mounting hole is provided at the end of the fork handle, the mounting handle of the ball head pressure plate is inserted into the pressure plate mounting hole, and a wire retaining ring is installed at the end.

[0015] The advantages of the present invention are: the rotation of the locking arm relies on the nut to transmit force, and when clamping the wood piece, the planes of the fixed jaw and the movable jaw are always in a parallel state, which will not cause any damage to the surface of the wood piece; the locking arm and the base clamping part adopts a floating ball head pressure plate, so that the clamping part changes from point clamping to line contact clamping, the locking force is increased, and the locking is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of a woodworking clamp of the present application;

[0017] Figure 2 yes Figure 1 Left view of;

[0018] Figure 3It is a structural schematic diagram of a movable clamp body;

[0019] Figure 4 It is a structural schematic diagram of a fixed clamp body;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the fixed clamp body;

[0021] Figure 6 for Figure 1 A in the enlarged view;

[0022] Figure 7 for Figure 1 The enlarged view of point B in the figure;

[0023] Figure 8 for Figure 2 The enlarged view of point C in the figure;

[0024] Fig. 9 is a schematic diagram of the structure of the locking arm;

[0025] Fig.10 It is a structural diagram of the nut;

[0026] Fig.11 Schematic diagram of the screw structure.

[0027] In the attached drawings, 1, lever; 2, movable pliers body; 2-1, movable jaws; 2-2, movable pliers light hole; 2-3, screw hole; 3, fixed pliers body; 3-1, fixed jaws; 3-2, fixed pliers body light hole; 3-3, sleeve; 3-4, pressure plate groove; 3-5, nut mounting hole; 3-6, upper fixed pliers body; 3-7, column through hole; 4, fastening screw; 5, guide rod; 6, nut; 7, screw; 8, screw; 9, base; 10, ball head pressure plate; 10-1, mounting handle; 11, locking arm; 11-1, fork arm; 11-2, fork handle; 11-3, nut top arm. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] A woodworking clamp (see Figure 1-11 ), including a movable jaw body 2 and a fixed jaw body 3, one end of a guide rod 5 is fixedly mounted on the movable jaw body 2, the guide rod 5 is movably inserted in the fixed jaw body 3, one end of a screw rod 7 is rotatably inserted in a screw rod hole 2-3 of the movable jaw body 2, a light hole is provided at the end of the screw rod 7 passing through the movable jaw body 2, a lever 1 is inserted in the light hole of the screw rod 7, a nut insertion hole 3-5 is provided on the fixed jaw body 3, a nut 6 is inserted in the nut insertion hole 3-5, and the nut 6 includes a round rod-shaped nut body (see Fig.10), a threaded hole is provided in the middle of the nut body, the axis of the threaded hole is perpendicular to the axis of the body, the screw rod 7 is threadedly connected with the nut 6; a fork-shaped locking arm 11 is hingedly mounted on the fixed clamp body 3, and a nut top arm 11-3 is provided at the end of the fork arm 11-1 of the locking arm 11 (see Fig. 9 ), a ball head pressure plate 10 is installed at the end of the fork handle 11-2; the fixed clamp body 3 is sleeved on the column of the base 9; the ball head of the ball head pressure plate 10 is against the column of the base 9.

[0030] Based on the above embodiments, the following improvements can be made:

[0031] Among them, the nut top arm 11-3 has a threaded inner cavity (see Figure 6 ), the fastening screw 4 is installed in the threaded inner cavity of the nut top arm 11-3, and the end of the fastening screw 4 is in contact with the nut 6;

[0032] The fixed clamp body 3 includes an upper fixed clamp body 3-6 (see Figure 4 , 5 ), a fixed jaw 3-1 is arranged on the upper edge of the front end of the upper fixed jaw body 3-6, and the fixed jaw 3-1 is plate-shaped. At least two fixed jaw body light holes 3-2 are arranged on the upper fixed jaw body 3-6, and the fixed jaw body light holes penetrate the upper fixed jaw body. A screw rod 7 is inserted into one of the fixed jaw body light holes 3-2, and a guide rod 5 is inserted into the other fixed jaw body light holes. The channel of the fixed jaw body light hole 3-2 where the screw rod 7 is inserted intersects vertically with the nut mounting hole 3-5; the lower portion of the upper fixed jaw body 3-6 A sleeve 3-3 for fitting the column of the base 9 is provided, and a pressure plate groove 3-4 is provided on the side wall of the sleeve 3-3; column through holes 3-7 are provided on both sides of the pressure plate groove 3-4 of the sleeve 3-3, and the centers of the two column through holes are on the same axis; the upper fixed clamp body 3-6 of the fixed clamp body 3 is a box-type structure; when the upper fixed clamp body of the box-type structure is adopted, a long hole is provided in the middle of the side wall of the upper fixed clamp body 3-6 for mounting the fixed jaw 3-1, for inserting the screw rod 7 and the screw nut top arm 11-3;

[0033] Threaded holes are arranged on both sides of the side wall of the upper fixed clamp body 3-6 for mounting the fixed jaw 3-1, and a screw 8 with a cylindrical end at the front end is installed in the threaded hole of the upper fixed clamp body 3-6. Hinge holes are arranged on both sides of the locking arm 11, and the cylindrical end of the screw 8 is inserted into the hinged hole of the locking arm 11; the hinged hole of the locking arm 11 is arranged on the fork arm 11-1;

[0034] A pressure plate mounting hole is provided at the end of the fork handle 11 - 2, and the mounting handle 10 - 1 of the ball head pressure plate 10 is inserted into the pressure plate mounting hole, and a wire retaining ring is installed at the end.

[0035] In addition: the guide rod 5 is assembled with the movable pliers body 2 and is interference fit, there are two guide rods 5, and a screw rod 7 is set for the two guide rods 5; the threaded rod of the screw rod 7 passes through the screw rod hole 2-3, the screw rod 7 is restricted by the retaining ring and the elastic cylindrical pin, and will not be separated from the movable pliers body, and the threaded rod of the screw rod 7 is screwed into the threaded hole of the nut 6;

[0036] The pressure plate plane of the ball head pressure plate 10 is pressed tightly against the cylindrical surface of the base, and the other end of the ball head pressure plate 10 is fixed in position by a shaft with a wire retaining ring.

[0037] The base 9 is triangular at the bottom and cylindrical at the top. The columns of the base 9 can be assembled with the fixed clamp body sleeve 3-3 and the column through hole 3-7 as needed to realize that the woodworking clamp can be placed vertically or horizontally and clamp the workpiece.

[0038] The working principle of the present invention is: the lever 1 is moved clockwise to rotate the screw rod 7, so that the movable jaw 2-1 and the fixed jaw 3-1 are in a closed clamping state or a wood piece is placed between the two jaws and is in a wood clamping state. At this time, the screw rod 7 and the nut 6 are in a tensioned state. Since there is a gap between the nut 6 and the nut mounting hole 3-5 assembled therewith, the column of the nut 6 will press against the hexagon socket set screw 4. The hexagon socket set screw 4 is subjected to force to cause the locking arm 11 to rotate counterclockwise, thereby driving the ball head pressure plate 10 to press against the column of the base 9, thereby realizing the function of automatically locking the base 9 while clamping the wood piece, so that the base 9 and the fixed clamp body 3 are tightly connected and cannot rotate, which is convenient for various woodworking operations on the clamped wood piece.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A woodworking clamp, comprising a movable clamp body (2) and a fixed clamp body (3), one end of a guide rod (5) is fixedly mounted on the movable clamp body (2), the guide rod (5) is movably inserted into the fixed clamp body (3), one end of a screw rod (7) is rotatably inserted into a screw rod hole (2-3) of the movable clamp body (2), a light hole is provided at the end of the screw rod (7) passing through the movable clamp body (2), and a lever (1) is inserted into the light hole of the screw rod (7), characterized in that: The fixed pliers body (3) is provided with a nut insertion hole (3-5), the nut (6) is inserted into the nut insertion hole (3-5), the nut (6) comprises a round rod-shaped nut body, a threaded hole is provided in the middle of the nut body, and the screw rod (7) is threadedly connected with the nut (6); a fork-shaped locking arm (11) is hingedly installed on the fixed pliers body (3), a nut top arm (11-3) is provided at the end of the fork arm (11-1) of the locking arm (11), and a ball head pressure plate is installed at the end of the fork handle (11-2) (10); the fixed clamp body (3) is mounted on the column of the base (9); the ball head of the ball head pressure plate (10) is against the column of the base (9); The upper fixed pliers body (3-6) of the fixed pliers body (3) is a box-type structure; a long hole for inserting a screw rod (7) and a nut top arm (11-3) is opened in the middle of the side wall of the upper fixed pliers body (3-6) on which the fixed pliers mouth (3-1) is installed; threaded holes are arranged on both sides of the side wall of the upper fixed pliers body (3-6) on which the fixed pliers mouth (3-1) is installed, and a screw (8) with a cylindrical end at the front end is installed in the threaded hole of the upper fixed pliers body (3-6); hinged circular holes are arranged on both sides of the locking arm (11), and the cylindrical end of the screw (8) is inserted in the hinged circular hole of the locking arm (11).

2. The woodworking clamp according to claim 1, characterized in that: The nut top arm (11-3) has a threaded inner cavity, and the fastening screw (4) is installed in the threaded inner cavity of the nut top arm (11-3).

3. The woodworking clamp according to claim 1, characterized in that: The fixed pliers body (3) comprises an upper fixed pliers body (3-6), a fixed jaw (3-1) is arranged on the upper edge of the front end of the upper fixed pliers body (3-6), at least two fixed pliers body light holes (3-2) are arranged on the upper fixed pliers body (3-6), a screw rod (7) is inserted into one of the fixed pliers body light holes (3-2), and guide rods (5) are inserted into the other fixed pliers body light holes, and the hole of the fixed pliers body light hole (3-2) in which the screw rod (7) is inserted intersects vertically with the nut mounting hole (3-5).

4. The woodworking clamp according to claim 3, characterized in that: A sleeve (3-3) for fitting onto a column of a base (9) is arranged below the upper fixed clamp body (3-6), and a pressure plate groove (3-4) is provided on a side wall of the sleeve (3-3).

5. The woodworking clamp according to claim 4, characterized in that: Column through holes (3-7) are arranged on both sides of the pressure plate groove (3-4) of the sleeve (3-3).

6. The woodworking clamp according to claim 1, characterized in that: The hinged circular hole of the locking arm (11) is arranged on the fork arm (11-1).

7. The woodworking clamp according to claim 1, characterized in that: The end of the fork handle (11-2) is provided with a pressure plate mounting hole, the mounting handle (10-1) of the ball head pressure plate (10) is inserted into the pressure plate mounting hole, and a wire retaining ring is installed at the end.

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