A type of flat-jaw pliers with accurate positioning and high positioning precision

Abstract

This utility model discloses a flat-jaw vise with accurate positioning and high positioning precision. The lower end of the fixed jaw is fixedly installed on one end of the base, and the support of the pushing mechanism is slidably and fixedly installed on the base. The lower end of the movable jaw clamping block is slidably installed on the base, with a movable jaw fixed at one end and a mounting hole at the upper end and a threaded hole I at the lower end of the other end. A steel ball mounting groove is formed on the U-shaped groove wall near the movable jaw. The upper surface of the L-shaped angle block is provided with an inclined surface, which is placed in the U-shaped groove of the clamping block. Its lower end is slidably installed on the base, and its inclined surface presses against the steel ball. A set screw threaded into the threaded hole I of the clamping block is pressed against the end face of the L-shaped angle block away from the movable jaw. The lead screw passes through the mounting hole of the clamping block and abuts against the end face of the L-shaped angle block away from the movable jaw. This utility model has a good inclined pressing effect, accurate positioning, good stability, and high positioning precision, which can meet the needs of high-precision machining of workpieces.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece clamping technology and relates to a flat-jaw vise with accurate positioning and high positioning precision. Background Technology

[0002] In traditional production processes, moving jaws without angled clamping technology cannot generate downward angled pressure. During processing, the workpiece floats and moves upward, making accurate positioning impossible and easily leading to unstable processing quality or scrap. Angle-fixed moving jaws with angled clamping use steel balls pressing against the angled surface of the moving jaw body, resulting in poor machinability and higher cost. In traditional production processes, the moving jaw clamping mechanism of flat-jaw vises cannot generate downward angled working pressure. During production, the workpiece floats and moves upward, causing the workpiece positioning surface to detach from the working surface of the jaw body, leading to inaccurate positioning and easily causing processing quality accidents. Traditional flat-jaw vises' moving jaw clamping mechanisms lack functional expansion structures, making it impossible to position and install other clamping elements, resulting in poor functional expansion performance. Angle-fixed moving jaws with angled clamping use steel balls pressing against the angled surface of the moving jaw body, resulting in poor machinability and higher cost. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems in the existing technology and provide a flat-jaw pliers with accurate positioning and high positioning precision. This flat-jaw pliers has good positioning stability, low cost, and is easy to process.

[0004] To achieve the above objectives, the technical solution of this utility model is: a flat-jaw vise with accurate positioning and high positioning precision, comprising a base, a fixed jaw, a movable jaw, and a pushing mechanism; the lower end of the fixed jaw is fixedly installed on one end of the base, and the lower end of the movable jaw is slidably installed on the base, with the jaws of the movable jaw cooperating with and opposite to the jaws of the fixed jaw; the pushing mechanism includes a support and a lead screw threadedly connected in the support, the support being slidably and fixedly installed on the base, and the pushing mechanism pushing the movable jaw towards the fixed jaw to clamp the workpiece;

[0005] The movable clamp includes a clamping block, an L-shaped angle block, movable clamp jaws, a steel ball, and a set screw. The clamping block is a U-shaped block, the lower end of which is slidably mounted on the base. Its U-shaped groove is the mounting groove for the L-shaped angle block. One end of the clamping block is fixed with the movable clamp jaws, and the other end has a mounting hole at the upper end and a threaded hole I at the lower end. A steel ball mounting groove is formed on the wall of the U-shaped groove near the movable clamp jaws. The upper surface of the L-shaped angle block is provided with an inclined surface, which is placed in the U-shaped groove of the clamping block. Its lower end is slidably mounted on the base, and its inclined surface presses against the steel ball, which is at least more than 1 / 2 of the part, mounted in the steel ball mounting groove. The set screw, which is threaded into the threaded hole I of the clamping block, is pressed against the end face of the L-shaped angle block away from the movable clamp jaws. The screw passes through the mounting hole of the clamping block and abuts against the end face of the L-shaped angle block away from the movable clamp jaws.

[0006] More preferably, the base has a T-shaped groove; the lower end of the clamping block is provided with a T-shaped boss I that matches the T-shaped groove, and the lower end of the L-shaped angle block is provided with a T-shaped boss II that matches the T-shaped groove; the clamping block is slidably installed in the T-shaped groove of the base through the T-shaped boss I and the L-shaped angle block is slidably installed in the T-shaped groove of the base through the T-shaped boss II.

[0007] More preferably, the T-shaped groove is provided with multiple conical grooves and multiple threaded holes II for fixing with other equipment; the bottom surface of the support is provided with a round hole, in which a small steel ball is placed; threaded holes III are provided on both sides of the support, which are connected to the round hole; threaded holes III are threadedly connected with set screws, which fix the small steel ball in the conical groove to fix the support on the base.

[0008] More preferably, the inclination angle of the inclined surface of the L-shaped angle block is 30-60°, with 45° being optimal. This results in the best distribution of lateral and vertical forces of the clamping force.

[0009] More preferably, the upper end face of the clamping block is provided with a positioning groove, and the positioning groove has a threaded mounting hole; the end of the clamping block away from the moving jaw is provided with a relief groove, and the mounting hole and the lower threaded hole I on the clamping block are located in the relief groove.

[0010] More preferably, the screw head is provided with a mushroom connector; the mounting hole on the clamping block is gourd-shaped, with a bottom hole at the lower end that allows the mushroom connector to enter, and an upper end that is a long through hole with a width smaller than the mushroom connector and tightly fitted with the connection part between the mushroom connector and the screw. The mushroom connector of the screw extends into the lower end of the mounting hole and is then lifted to engage the connection part between the mushroom connector and the screw at the upper end of the mounting hole.

[0011] This invention features excellent downward clamping effect, ensuring the workpiece does not float upwards during use, resulting in accurate and high-precision positioning that meets the needs of high-precision machining. The L-shaped angle block and steel ball provide point-to-point clamping, generating uniform downward pressure on the workpiece, reducing clamping deformation and achieving high-precision machining. The gourd-shaped mounting holes on the clamping block facilitate the installation and positioning of the lead screw, ensuring good clamping stability. This invention is low-cost and easy to manufacture.

[0012] This invention features a superior clamping expansion function. A positioning groove and threaded mounting holes are provided on the upper surface of the clamping block, allowing for convenient installation of various clamping elements with different functions, thus expanding the clamping range. A support relief groove is designed at the rear end of the clamping block to further expand the clamping range and improve the unit efficiency of the vises. Attached Figure Description

[0013] Figure 1 This is a front-view sectional view of the present invention;

[0014] Figure 2 This is a top view of the present invention;

[0015] Figure 3 This is a front view of the movable clamp in this utility model;

[0016] Figure 4 This is a left view of the movable clamp in this utility model;

[0017] Figure 5 This is a top view of the movable clamp in this utility model;

[0018] Figure 6 for Figure 5 AA section view;

[0019] Figure 7 This is the front view of the L-shaped angle block in this utility model;

[0020] Figure 8 This is a top view of the L-shaped angle block in this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 8 As shown, this embodiment includes a base 1, a fixed clamp 4, a movable clamp 3, and a pushing mechanism. The lower end of the fixed clamp 4 is fixedly installed on one end of the base 1, and the lower end of the movable clamp 3 is slidably installed on the base 1. The jaws of the movable clamp and the fixed clamp are fitted together and installed opposite each other. The pushing mechanism includes a support 21 and a lead screw 22 threadedly connected in the support 21. The support 21 is slidably and fixedly installed on the base 1. The pushing mechanism pushes the movable clamp 3 towards the fixed clamp 4 to clamp the workpiece. The movable clamp 3 includes a clamping block 31, an L-shaped angle block 32, a movable clamp jaw 34, a steel ball 33, and a set screw 35. The clamping block 31 is a U-shaped block, the lower end of which is slidably installed on the base. Its U-shaped groove is the mounting groove of the L-shaped angle block 32. One end of the clamp is fixed with the movable clamp jaw 34, and the other end has a mounting hole 36 at the upper end and a threaded hole I at the lower end. A steel ball mounting groove is opened on the wall of the U-shaped groove near the movable clamp jaw. The upper surface of the L-shaped angle block 32 is provided with an inclined surface 38, which is placed in the U-shaped groove of the clamping block 31. Its lower end is slidably mounted on the base, and its inclined surface 38 presses against the steel ball 33, which is mounted in the steel ball mounting groove for at least more than 1 / 2 of its portion. The set screw 35, which is threaded into the threaded hole I of the clamping block 31, is pressed against the end face of the L-shaped angle block 32 away from the moving jaw. The lead screw 22 passes through the mounting hole 36 of the clamping block 31 and then abuts against the end face of the L-shaped angle block 32 away from the moving jaw.

[0023] In this embodiment, the base 1 has a T-shaped groove; the lower end of the clamping block 31 is provided with a T-shaped boss I that matches the T-shaped groove, and the lower end of the L-shaped angle block 32 is provided with a T-shaped boss II that matches the T-shaped groove. The clamping block 31 is slidably installed in the T-shaped groove of the base 1 through the T-shaped boss I, and the L-shaped angle block 32 is slidably installed in the T-shaped groove of the base 1 through the T-shaped boss II.

[0024] In this embodiment, the T-shaped groove is provided with multiple conical grooves and multiple threaded holes II for fixing to other equipment. The bottom surface of the support 21 is provided with a circular hole, in which a small steel ball is placed. Threaded holes III are provided on both sides of the support 21, which are connected to the circular hole. The threaded holes III are threaded with set screws, which fix the small steel ball in the conical groove to fix the support 21 on the base 1.

[0025] In this embodiment, the tilt angle of the inclined surface 38 of the L-shaped angle block 32 is 30-60°, with 45° being optimal. This results in the best distribution of lateral and vertical forces of the clamping force.

[0026] In this embodiment, a positioning groove 39 is provided on the upper end face of the clamping block 31, and a threaded mounting hole is provided on the positioning groove 39. A relief groove 37 is provided at the end of the clamping block 31 away from the jaws of the moving clamp, and the mounting hole 36 and the lower threaded hole I on the clamping block are located in the relief groove 37.

[0027] In this embodiment, the head of the lead screw 22 is provided with a mushroom-shaped connector. The mounting hole 36 on the clamping block 31 is gourd-shaped, with a bottom hole at the lower end that allows the mushroom connector to enter, and an elongated through hole at the upper end that is narrower than the mushroom connector and fits tightly with the connection between the mushroom connector and the lead screw 22. The mushroom connector of the lead screw 22 extends into the lower end of the mounting hole 36 and is then lifted to engage the connection between the mushroom connector and the lead screw 22 at the upper end of the mounting hole 36.

[0028] The above embodiments are merely preferred and exemplary. Those skilled in the art can make equivalent technical changes based on the description of this patent, all of which are covered by the protection scope of this patent.

Claims

1. A type of flat-jaw pliers with accurate positioning and high positioning precision, characterized in that: It includes a base, a fixed clamp, a movable clamp, and a pushing mechanism; the lower end of the fixed clamp is fixedly installed on one end of the base, and the lower end of the movable clamp is slidably installed on the base. The jaws of the movable clamp and the jaws of the fixed clamp are engaged and installed opposite each other; the pushing mechanism includes a support and a lead screw threaded into the support. The support is slidably and fixedly installed on the base, and the pushing mechanism pushes the movable clamp toward the fixed clamp to clamp the workpiece. The movable clamp includes a clamping block, an L-shaped angle block, movable clamp jaws, a steel ball, and a set screw. The clamping block is a U-shaped block, with its lower end slidably mounted on the base. Its U-shaped groove is the mounting groove for the L-shaped angle block. One end of the clamping block is fixed with the movable clamp jaws, and the other end has a mounting hole at the upper end and a threaded hole I at the lower end. A steel ball mounting groove is formed on the wall of the U-shaped groove near the movable clamp jaws. The upper surface of the L-shaped angle block is provided with an inclined surface, which is placed in the U-shaped groove of the clamping block. Its lower end is slidably mounted on the base, and its inclined surface presses against the steel ball, which is mounted on at least more than 1 / 2 of its portion, in the steel ball mounting groove. The set screw, threaded into the threaded hole I of the clamping block, is pressed against the end face of the L-shaped angle block away from the movable clamp jaws. The lead screw passes through the mounting hole of the clamping block and abuts against the end face of the L-shaped angle block away from the movable clamp jaws.

2. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 1, characterized in that: The base has a T-shaped groove; the lower end of the clamping block is provided with a T-shaped boss I that matches the T-shaped groove, and the lower end of the L-shaped angle block is provided with a T-shaped boss II that matches the T-shaped groove; the clamping block is slidably installed in the T-shaped groove of the base through the T-shaped boss I and the L-shaped angle block is slidably installed in the T-shaped groove of the base through the T-shaped boss II.

3. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 2, characterized in that: The T-shaped groove is provided with multiple conical grooves and multiple threaded holes II for fixing to other equipment; the bottom surface of the support is provided with a round hole, in which a small steel ball is placed; threaded holes III are provided on both sides of the support, which are connected to the round hole; threaded holes III are threaded with set screws, which fix the small steel ball in the conical groove to fix the support on the base.

4. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 1, 2, or 3, characterized in that: The screw head is provided with a mushroom connector; the mounting hole on the clamping block is gourd-shaped, with a bottom hole at the lower end that allows the mushroom connector to enter, and a long through hole at the upper end that is narrower than the mushroom connector and fits tightly with the connection between the mushroom connector and the screw. The mushroom connector of the screw extends into the lower end of the mounting hole and is then lifted to engage the connection between the mushroom connector and the screw at the upper end of the mounting hole.

5. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 4, characterized in that: The tilt angle of the tilted surface of the L-shaped angle block is 30-60°.

6. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 5, characterized in that: The upper end face of the clamping block is provided with a positioning groove, and a threaded mounting hole is opened in the positioning groove; the end of the clamping block away from the moving jaw is provided with a relief groove, and the mounting hole and the lower threaded hole I on the clamping block are located in the relief groove.

7. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 1, 2, or 3, characterized in that: The tilt angle of the tilted surface of the L-shaped angle block is 30-60°.

8. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 7, characterized in that: The upper end face of the clamping block is provided with a positioning groove, and a threaded mounting hole is opened in the positioning groove; the end of the clamping block away from the moving jaw is provided with a relief groove, and the mounting hole and the lower threaded hole I on the clamping block are located in the relief groove.

9. The flat-jaw pliers with accurate positioning and high positioning precision according to claim 1, 2, or 3, characterized in that: The upper end face of the clamping block is provided with a positioning groove, and a threaded mounting hole is opened in the positioning groove; the end of the clamping block away from the moving jaw is provided with a relief groove, and the mounting hole and the lower threaded hole I on the clamping block are located in the relief groove.

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