Rotatable self-centering bench clamp

Abstract

The utility model discloses a rotatable self-centering bench vise, which relates to the technical field of bench vises, and comprises a base, a rotating seat is rotatably arranged on the base, a locking screw is connected in a locking nut, a vise body seat is arranged on the rotating seat, a bidirectional threaded lead screw is arranged on the vise body seat, and the bidirectional threaded lead screw is connected with a locking nut. The bidirectional threaded lead screw drives the two jaw plates to move at the same time, self-centering is achieved, the locking screw has the trend of moving upwards through threaded fit of the locking nut and the locking screw, and the pre-fixing mechanism is installed in the middle of the vice body seat. When the locking nut is rotated reversely, the rotating base can rotate freely, and a proper angle is selected through scales, so that a workpiece can be subjected to 360-degree stepless rotating adjustment along the Z axis, and various tests can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of bench vises, in particular to a rotatable self-centering bench vise. Background Art

[0002] A bench vise, also known as a vice, is a general-purpose fixture installed on a workbench for clamping workpieces. It is an essential tool in a bench workshop. Most of the bench work, such as sawing, filing, chiseling, and assembly and disassembly of parts, is done on a bench vise. It is also widely used in mechanical manufacturing, maintenance, handicrafts and other fields. It can be used to clamp workpieces of various shapes and sizes for processing, measuring, assembly and other operations. The existing Chinese patent announcement number CN218927484U discloses a bench vise, including a bench vise body, which includes a fixed seat, an operating plate seat and a movable clamp plate. The operating plate seat is rotatably connected to the upper surface of the fixed seat, and the movable clamp plate is provided. The vise body is arranged at one end of the upper surface of the operating plate base, and is further provided with a fastening mechanism, which is convenient for tightening the assembly and the locking assembly. By designing the fastening mechanism, the fixing base can be fixedly installed after the fixing bolt passes through the interior of the screw hole. At this time, the fastening nut is screwed on the outer surface of the threaded rod to drive the threaded rod to slide inside the connecting hole until the threaded rod is moved and the locking workpiece is moved inside the groove, so that the locking workpiece is tightly pressed against the end surface of the fixing bolt. Therefore, the fixing bolt is locked after the fixing bolt is fixedly installed, and the fixation of the vise body can be strengthened when it is affected by external force and rotated during use after the vise body is installed.

[0003] The existing technology positions the workpiece only by moving a movable lead plate, which cannot ensure that the center position of the workpiece is constant, making it inconvenient for subsequent processing. In addition, the bottom of the vise is fixed and the angle of the workpiece cannot be adjusted. When operations are required on other surfaces of the workpiece, the workpiece needs to be repeatedly disassembled and installed, which is extremely inconvenient. Utility Model Content

[0004] The purpose of the present utility model is to provide a rotatable self-centering bench vise, which can make the two jaws move synchronously to achieve the effect of self-centering, and can make the workpiece 360 ​​degrees steplessly rotated along the Z axis to facilitate various operations, effectively solving the problems in the above-mentioned background technology.

[0005] The utility model provides a rotatable self-centering bench vise, comprising a base, a rotating seat rotatably arranged on the base, a locking nut provided on the rotating seat, a locking screw connected to the inner thread of the locking nut, a clamp body seat fixedly installed on the rotating seat, a bidirectional threaded screw provided on the clamp body seat, jaw plates connected to both ends of the bidirectional threaded screw, and a pre-fixing mechanism installed on the upper surface of the middle part of the clamp body seat.

[0006] Preferably, a connecting seat is provided on the upper surface of the base, a positioning protrusion is provided in the middle of the base, the positioning protrusion is inserted into the middle of the lower surface of the rotating seat, an annular groove for locking the screw is opened on the upper surface of the base, and an opening is opened at the bottom of the base.

[0007] Preferably, a scale is provided on the outer peripheral surface of the rotating seat, the locking screw passes through the rotating seat and an inclined surface block is provided at the bottom, and the inclined surface block is movably provided in the annular groove.

[0008] Preferably, the locking nut is rotatably connected to the rotating seat, and an operating rod is provided through the upper end of the locking nut.

[0009] Preferably, a clamp body block is fixedly mounted on one end of the clamp body seat, angular contact ball bearings are installed inside the clamp body seat and the clamp body block, and both ends of the bidirectional threaded screw are fixedly mounted inside the angular contact ball bearings.

[0010] Preferably, one end of the bidirectional threaded screw is fixedly connected to a square protrusion, and the square protrusion is located outside the clamp body seat.

[0011] Preferably, the four corners of the clamp body seat are fixedly connected with connecting protrusions, and the connecting protrusions are fixedly installed on the upper surface of the rotating seat.

[0012] Preferably, a clamping strip is fixedly connected to the inner side wall of the clamp body seat, a movable clamp body is slidably connected to the clamping strip, and the upper end of the movable clamp body is fixedly connected to the jaw plate.

[0013] Preferably, the pre-fixing mechanism includes a mounting frame, which is fixedly mounted on the middle part of the upper surface of the clamp body seat, and both ends of the upper part of the mounting frame are rotatably connected to movable plates.

[0014] Preferably, torsion springs are installed on both sides of the movable plate, and a roller is rotatably installed on one end of the movable plate away from the torsion spring.

[0015] Compared with the prior art, the rotatable self-centering bench vise provided by the embodiment of the utility model has the following advantages:

[0016] 1. The utility model provides an inclined stop block, so that the bottom of the locking screw can only slide along the annular groove and cannot rotate itself. When the locking nut is tightened, the locking nut cooperates with the thread of the locking screw, so that the locking screw tends to move upward, and the base will be supported by the inclined stop block below, thereby preventing the rotating base from rotating by increasing the friction force. On the contrary, when the locking nut is rotated in the opposite direction, the rotating base can rotate freely, and the workpiece can be adjusted to a suitable angle by selecting a scale to perform 360-degree stepless rotation along the Z axis, so as to facilitate various tests.

[0017] 2. The utility model is provided with a bidirectional threaded screw, which can drive the two movable clamp bodies to move simultaneously when rotating, thereby achieving a self-centering effect.

[0018] 3. The utility model preliminarily fixes the workpiece by setting a movable plate under the torsion of the torsion spring, thereby preventing the workpiece from moving at will, facilitating the improvement of the accuracy of the subsequent clamping position of the jaw plate, and eliminating the need to hold the workpiece by hand for clamping, thereby improving the convenience and safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0022] Figure 3 For the embodiment of the utility model Figure 2 Schematic diagram of the AA section structure;

[0023] Figure 4 For the embodiment of the utility model Figure 2 Schematic diagram of the three-dimensional structure of the middle BB section;

[0024] Figure 5 This is an exploded view of the structure of the clamp body block in the embodiment of the present utility model;

[0025] Figure 6 This is an exploded view of the structure of the rotating seat in the embodiment of the present utility model;

[0026] Figure 7 For the embodiment of the utility model Figure 1 A magnified view of the structure at point C in the middle;

[0027] Figure 8 It is a structural explosion diagram of the pre-fixing mechanism in an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 1. Base; 11. Connecting seat; 12. Positioning protrusion; 13. Annular groove; 14. Opening; 2. Pre-fixing mechanism; 21. Mounting frame; 22. Movable plate; 23. Torsion spring; 24. Roller; 3. Clamp body seat; 31. Bidirectional threaded screw; 32. Movable clamp body; 33. Jaw plate; 34. Clamp body block; 35. Clip strip; 36. Square protrusion; 37. Connecting protrusion; 38. Angular contact ball bearing; 4. Rotating seat; 41. Scale; 5. Locking nut; 51. Operating lever; 6. Locking screw; 61. Inclined block. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0031] Please refer to Figures 1-8 The embodiment of the utility model provides a rotatable self-centering bench vise, including a base 1, a rotating base 4 is rotatably provided on the base 1, a locking nut 5 is provided on the rotating base 4, a locking screw 6 is connected to the internal thread of the locking nut 5, a clamp body seat 3 is fixedly installed on the rotating base 4, a bidirectional threaded screw 31 is provided on the clamp body seat 3, both ends of the bidirectional threaded screw 31 are connected to a jaw plate 33, and a pre-fixing mechanism 2 is installed on the upper surface of the middle part of the clamp body seat 3.

[0032] A connecting seat 11 is provided on the upper surface of the base 1, and a positioning protrusion 12 is provided in the middle of the base 1. The positioning protrusion 12 is inserted into the middle of the lower surface of the rotating seat 4. An annular groove 13 for the movement of the locking screw 6 is provided on the upper surface of the base 1. An opening 14 is provided at the bottom of the base 1. A scale 41 is provided on the outer circumference of the rotating seat 4. The locking screw 6 passes through the rotating seat 4 and a bevel block 61 is provided at the bottom. The bevel block 61 is movably set in the annular groove 13. The locking nut 5 is rotatably connected to the rotating seat 4, and an operating rod 51 is provided through the upper end of the locking nut 5.

[0033] Specifically, the function of the base 1 is to fix the entire bench vise and connect the rotating base 4. The annular groove 13 is in an inverted V shape and is arranged at the upper end of the base 1 for the locking screw 6 to rotate therein. The annular groove 13 is connected to the opening 14, and the opening 14 is used to install the inclined block 61 at the bottom of the locking screw 6. The positioning protrusion 12 is cylindrical and is used for centering the rotating base 4.

[0034] By providing the scale 41 , the angle of rotation of the workpiece can be more accurately determined.

[0035] The bottom of the rotating seat 4 is connected to the base 1 through a locking screw 6 and a locking nut 5, and the top is connected to the clamp body seat 3 through a bolt. There are two slightly larger holes and four small holes on the rotating seat 4. The two slightly larger holes are used to pass the locking screw 6, and the four small holes are used to fix the clamp body.

[0036] By setting the inclined stop block 61, the bottom of the locking screw 6 can only slide along the annular groove 13 and cannot rotate itself. When the locking nut 5 is tightened, the locking nut 5 cooperates with the thread of the locking screw 6, so that the locking screw 6 tends to move upward, and will support the base 1 through the inclined stop block 61 below, thereby preventing the rotating base 1 from rotating by increasing the friction force. On the contrary, when the locking nut 5 is rotated in the opposite direction, the rotating base 1 can rotate freely, and the appropriate angle can be selected by the scale 41, so that the workpiece can be rotated 360 degrees steplessly along the Z axis to facilitate various tests.

[0037] A clamp body block 34 is fixedly installed at one end of the clamp body seat 3, and angular contact ball bearings 38 are installed inside the clamp body seat 3 and the clamp body block 34. Both ends of the bidirectional threaded screw 31 are fixedly installed inside the angular contact ball bearing 38, and one end of the bidirectional threaded screw 31 is fixedly connected to a square protrusion 36. The square protrusion 36 is located on the outside of the clamp body seat 3. The four corners of the clamp body seat 3 are fixedly connected with connecting protrusions 37. The connecting protrusions 37 are fixedly installed on the upper surface of the rotating seat 4. A clamping strip 35 is fixedly connected to the inner side wall of the clamp body seat 3, and a movable clamp body 32 is slidably connected to the clamping strip 35. The upper end of the movable clamp body 32 is fixedly connected to the jaw plate 33.

[0038] In this application, the clamp body seat 3 mainly plays a fixing and supporting role. The four connecting protrusions 37 at the bottom are used to connect to the rotating seat 4. Two threaded holes are provided in the front to fix the clamp body block 34. A countersunk hole is provided at the end. The angular contact ball bearing 38 at one end is installed in the countersunk hole. The through hole in the countersunk hole allows the screw to pass through. Several threaded holes are provided inside the clamp body seat 3 for installing the clamping strip 35.

[0039] The clamp body block 34 is detachably connected to the clamp body seat 3, which can facilitate the installation of the bidirectional threaded screw 31. The square protrusion 36 set at one end of the bidirectional threaded screw 31 can be easily rotated using the handle. When the bidirectional threaded screw 31 rotates, due to the different thread directions, the movable clamp bodies 32 on both sides will move in opposite directions to achieve a self-centering effect. The jaw plate 33 is used for clamping tooling and can be replaced with different shapes to facilitate maintenance and adaptation to workpieces of different shapes. Angular contact ball bearings 38 are installed on the clamp body seat 3 and the clamp body block 34 to reduce friction during rotation. The clamping strip 35 is installed between the clamp body seat 3 and the movable clamp body 32 to constrain the movable clamp body 32 so that it can only move along the guide rail and is fixed to the clamp body seat 3 by bolts.

[0040] When the bidirectional threaded screw 31 rotates, the movable clamp bodies 32 on both sides will move simultaneously with the midpoint of the bidirectional threaded screw 31 as the center to achieve a self-centering effect. The threaded hole in the middle of the movable clamp body 32 is used to cooperate with the bidirectional threaded screw 31. The two countersunk holes on the top are fixed to the jaw plate 33 by bolts. The bottom of the movable clamp body 32 is narrower and can be inserted into the clamp body seat 3. The two grooves need to pass through the clamping strip 35 so that the movable clamp body 32 can slide along the clamping strip 35 in the horizontal plane.

[0041] The pre-fixing mechanism 2 includes a mounting frame 21, which is fixedly installed in the middle of the upper surface of the clamp body seat 3. Both ends of the upper part of the mounting frame 21 are rotatably connected to a movable plate 22. Torsion springs 23 are installed on both sides of the movable plate 22. A roller 24 is rotatably installed on the end of the movable plate 22 away from the torsion spring 23.

[0042] In the present application, both ends of the mounting frame 21 are fixed to the clamp body seat 3 by bolts, and the mounting frame 21 spans the middle of the bidirectional threaded screw 31. Under the torsional force of the torsion spring 23, the upper ends of the movable plates 22 on both sides are close to each other, so that the two rollers 24 are against each other. When in use, the two rollers 24 are pulled apart to place the workpiece between the two rollers 24. Through the torsional force of the torsion spring 23, the movable plates 22 and rollers 24 on both sides clamp the workpiece to prevent the workpiece from moving at will, thereby facilitating the improvement of the accuracy of the subsequent clamping position of the jaw plate 33. There is no need to hold the workpiece for clamping operations, which improves the convenience and safety of operation.

[0043] In summary, the working principle of the rotatable self-centering vise in the embodiment of the present invention is:

[0044] When in use, pull the two rollers 24 outward and place the workpiece in the middle of the mounting bracket 21. When the rollers 24 are loosened, the movable plates 22 on both sides drive the rollers 24 to clamp the workpiece under the elastic force of the torsion springs 23, thereby achieving preliminary fixation of the workpiece. Subsequently, the two-way threaded screw 31 is rotated to drive the two movable clamp bodies 32 and the jaw plates 33 closer to achieve fixation and centering of the workpiece. When the locking nut 5 is tightened, the locking nut 5 cooperates with the threads of the locking screw 6, so that the locking screw 6 tends to move upward, and will support the base 1 through the inclined block 61 below, thereby increasing the friction force and preventing the rotating base 1 from rotating. On the contrary, when the locking nut 5 is rotated in the opposite direction, the rotating base 1 can rotate freely, and the appropriate angle can be selected by the scale 41, so that the workpiece can be rotated 360 degrees along the Z axis steplessly to facilitate various tests.

[0045] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A rotatable self-centering vise comprising a base (1) and characterized in that: A rotating seat (4) is rotatably provided on the base (1), a locking nut (5) is provided on the rotating seat (4), a locking screw (6) is connected to the inner thread of the locking nut (5), a clamp body seat (3) is fixedly installed on the rotating seat (4), a bidirectional threaded screw (31) is provided on the clamp body seat (3), both ends of the bidirectional threaded screw (31) are connected to a jaw plate (33), and a pre-fixing mechanism (2) is installed on the upper surface of the middle part of the clamp body seat (3).

2. The rotatable self-centering vise according to claim 1, characterized in that: The upper surface of the base (1) is provided with a connecting seat (11), the middle of the base (1) is provided with a positioning protrusion (12), the positioning protrusion (12) is plugged into the middle of the lower surface of the rotating base (4), the upper surface of the base (1) is provided with an annular groove (13) for the movement of the locking screw (6), and the bottom of the base (1) is provided with an opening (14).

3. The rotatable self-centering vise according to claim 2, characterized in that: A scale (41) is provided on the outer circumferential surface of the rotating seat (4), the locking screw (6) passes through the rotating seat (4) and a bevel block (61) is provided at the bottom, and the bevel block (61) is movably provided in the annular groove (13).

4. The rotatable self-centering vise according to claim 1, characterized in that: The locking nut (5) is rotatably connected to the rotating seat (4), and an operating rod (51) is provided through the upper end of the locking nut (5).

5. The rotatable self-centering vise according to claim 1, characterized in that: A clamp body block (34) is fixedly mounted on one end of the clamp body seat (3), angular contact ball bearings (38) are installed inside the clamp body seat (3) and the clamp body block (34), and both ends of the bidirectional threaded screw (31) are fixedly mounted inside the angular contact ball bearings (38).

6. The rotatable self-centering vise according to claim 5, characterized in that: One end of the bidirectional threaded screw (31) is fixedly connected to a square protrusion (36), and the square protrusion (36) is located outside the clamp body seat (3).

7. The rotatable self-centering vise according to claim 1, characterized in that: The four corners of the clamp body seat (3) are fixedly connected with connecting protrusions (37), and the connecting protrusions (37) are fixedly mounted on the upper surface of the rotating seat (4).

8. The rotatable self-centering vise according to claim 1, characterized in that: A clamping strip (35) is fixedly connected to the inner side wall of the clamp body seat (3), a movable clamp body (32) is slidably connected to the clamping strip (35), and the upper end of the movable clamp body (32) is fixedly connected to the jaw plate (33).

9. The rotatable self-centering vise according to claim 1, characterized in that: The pre-fixing mechanism (2) comprises a mounting frame (21), the mounting frame (21) being fixedly mounted on the middle portion of the upper surface of the clamp body seat (3), and both ends of the upper portion of the mounting frame (21) being rotatably connected to movable plates (22).

10. The rotatable self-centering vise according to claim 9, characterized in that: Torsion springs (23) are installed on both sides of the movable plate (22), and a roller (24) is rotatably installed on one end of the movable plate (22) away from the torsion spring (23).

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