A self-centering vice

Abstract

The utility model relates to vice technical field discloses a self-centering vice, including base, two -way screw rod and clamp, the base is opened with the mounting groove, two -way screw rod is located in the mounting groove, two -way screw rod rotation assembly in the base, the clamp with two -way screw rod screw matches, the clamp is symmetrically located two ends of two -way screw rod, the side groove wall of mounting groove is opened with the sliding slot, the sliding slot includes the rounded V -groove, the clamp is connected in the base through the rounded V -groove sliding, the bottom groove wall of mounting groove is opened with the mounting hole. The present application has solved the problem that the existing vice makes the sliding groove shallow because of the short distance between the mounting groove and the base, leading to insufficient stress area and stress concentration, improves the effect that vice clamping precision and service life.

Description

Technical Field

[0001] This utility model relates to the field of vise technology, specifically a self-centering vise. Background Technology

[0002] In the field of modern machining, vises are a common type of clamping tool, widely used in various metal processing and manufacturing processes. The main function of vises is to firmly clamp the workpiece with their jaws to ensure that the workpiece remains stable and stationary during the processing.

[0003] The existing vise includes a base, a lead screw, and two clamps. The base is square-shaped, with a mounting groove through one side. The mounting groove is shaped like an upward-facing "U". The lead screw is located in the mounting groove and is rotatably mounted to the base. The lead screw adopts a two-way lead screw structure. Specifically, the two ends of the lead screw are respectively provided with a left-hand thread and a right-hand thread. One clamp thread matches the left-hand thread, and the other clamp thread matches the right-hand thread. A sliding groove is provided on the side wall of the mounting groove. The sliding groove is shaped like an "U". The clamps are inserted into the sliding groove and are slidably connected to the base through the sliding groove. The workpiece is placed in the jaws formed by the two clamps. The lead screw is rotated to bring the two clamps closer together until the two clamps tighten the workpiece.

[0004] Mounting holes are made at the four ends of the base. Bolts or screws are usually inserted into the mounting holes and the base is fixed to the workbench surface by threading. However, although this fixing method can ensure the stability of the base to a certain extent, in order to reduce costs, the distance between the side wall of the mounting groove and the outer wall of the base is short. Therefore, after the mounting holes are made, the remaining groove depth of the sliding groove is limited, which makes the sliding groove usually shallow. This results in insufficient force-bearing area due to the shallow sliding groove depth when applying clamping force, which greatly increases the compressive stress per unit area. At the same time, the geometric change at the right angle corner of the sliding groove increases the stress concentration factor, forming fatigue crack initiation under cyclic load. This makes the base prone to local plastic deformation or even crack propagation under long-term load, resulting in a gap between the vise and the base. This causes a noticeable "free return" feeling during operation, affecting the positioning accuracy and even potentially leading to structural failure and shortening the service life of the vise.

[0005] Therefore, it is urgent to solve the above problems. Utility Model Content

[0006] Based on the above, the purpose of this utility model is to provide a self-centering vise to solve the problem that existing vises have insufficient force-bearing area and stress concentration due to the shallow sliding groove caused by the short distance between the mounting groove and the base.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A self-centering vise includes a base, a bidirectional lead screw, and clamps. The base has a mounting groove, and the bidirectional lead screw is located within the mounting groove and rotatably mounted on the base. The clamps are threadedly matched with the bidirectional lead screw and are symmetrically positioned at both ends of the bidirectional lead screw. The side wall of the mounting groove has a sliding groove, which includes a rounded V-shaped groove. The clamps are slidably connected to the base through the rounded V-shaped groove. The bottom wall of the mounting groove has a mounting hole.

[0009] As a preferred embodiment of a self-centering vise, an annular groove is provided at the middle position of the bidirectional lead screw, a support seat is provided on the base, and an arc-shaped groove is provided on the support seat, with the groove wall of the annular groove fitting against the groove wall of the arc-shaped groove.

[0010] As a preferred embodiment of the self-centering vise, the top wall of the support base is provided with a placement groove, the placement groove is located at the top of the arc-shaped groove, the placement groove is connected to the arc-shaped groove, and the opening of the placement groove away from the arc-shaped groove is not smaller than the opening of the arc-shaped groove near the placement groove.

[0011] As a preferred embodiment of a self-centering vise, the arc-shaped groove is semi-circular.

[0012] As a preferred embodiment of a self-centering vise, the support base includes a mounting plate and a support plate, the mounting plate being detachably connected to the base, the bottom of the support plate being connected to the top of the mounting plate, and the arcuate groove being formed in the support plate.

[0013] As a preferred embodiment of a self-centering vise, the vise is equipped with a scale, the scale has a zero mark, and the zero mark line is located in the same vertical plane as the rotation axis of the bidirectional lead screw.

[0014] As a preferred embodiment of a self-centering vise, the scale values ​​at both ends of the scale, with the zero mark as the dividing line, are all positive numbers.

[0015] As a preferred embodiment of a self-centering vise, the edge of the scale is provided with toothed grooves along the scale direction, and the adjacent positions of the toothed grooves are flared outwards.

[0016] As a preferred embodiment of a self-centering vise, the tip position of adjacent tooth grooves corresponds to the midpoint of adjacent integer scale values ​​on a ruler.

[0017] As a preferred embodiment of a self-centering vise, the area of ​​the clamping surface of the vise is larger than the area of ​​the side of the vise away from the clamping surface.

[0018] The beneficial effects of this utility model are as follows: by opening the mounting hole on the bottom wall of the mounting groove, rather than the top wall of the base, the problem of insufficient force-bearing area caused by the limitation of the sliding groove depth when opening the mounting hole on the top wall of the base is reduced. This helps to reduce the compressive stress per unit area, reduce the possibility of local plastic deformation, crack propagation, and the "empty return" feeling, and improve the clamping and positioning accuracy. At the same time, by optimizing the right-angle corner of the existing sliding groove into a rounded V-shaped groove structure, the stress concentration phenomenon caused by geometric change is effectively alleviated, the probability of fatigue crack initiation is reduced, and the fatigue resistance of the structure is significantly improved under cyclic load. The dual optimization measures together extend the service life of the vise base and improve the stability and reliability of workpiece clamping. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a side view of the overall structure in an embodiment of the present utility model;

[0021] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the support base in an embodiment of the present utility model;

[0023] Figure label:

[0024] 1. Base; 11. Mounting slot; 111. Rounded V-groove; 112. Mounting hole; 12. Reserved slot; 2. Two-way lead screw; 21. Annular groove; 3. Clamp; 31. Scale; 311. Toothed groove; 4. Mounting plate; 41. Support plate; 411. Arc groove; 412. Placement slot. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described in detail below with reference to the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not the entire structure.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0030] This application discloses a self-centering vise.

[0031] Reference Figure 1 and Figure 2A self-centering vise includes a base 1, a bidirectional lead screw 2, and clamps 3. A mounting groove 11 is formed through one side of the base 1, and the mounting groove 11 is U-shaped with its opening facing upwards. The bidirectional lead screw 2 is located within the mounting groove 11, and the length direction of the bidirectional lead screw 2 is parallel to the through direction of the mounting groove 11. The bidirectional lead screw 2 is rotatably mounted on the base 1. The clamps 3 are threadedly matched with the bidirectional lead screw 2 and are symmetrically arranged at both ends of the bidirectional lead screw 2. Specifically, the two clamps 3 are threadedly matched with the two opposite threads of the bidirectional lead screw 2. Sliding grooves are formed on both side walls of the mounting groove 11, extending through both sides of the base 1. The through-path is parallel to the through-path of the mounting groove 11. The sliding groove includes a rounded V-shaped groove 111, so that the tip of the V-shape of the rounded V-shaped groove 111 is rounded to reduce the possibility of stress concentration caused by sharp corner connection. The clamp 3 is inserted into the rounded V-shaped groove 111 and the clamp 3 is slidably connected to the base 1 through the rounded V-shaped groove 111. The bottom wall of the mounting groove 11 has mounting holes 112. The mounting holes 112 are distributed around the periphery of the mounting groove 11. The mounting holes 112 are used for fasteners such as bolts or screws to pass through, so that the base 1 can be fixed to the workbench by using fasteners. Preferably, in this embodiment, the fastener is a screw.

[0032] To further reduce the possibility of stress concentration on the sliding groove wall, multiple rounded V-shaped grooves 111 are provided on the same side of the mounting groove 11, and the groove walls of adjacent rounded V-shaped grooves 111 are transitioned by arc surfaces to form a tooth structure. When it is necessary to firmly clamp the workpiece, multiple rounded V-shaped grooves 111 can provide additional mechanical "gearing" force, increase the static friction between the vise and the base 1, and improve the clamping stability of the clamp 3 on the workpiece. Preferably, in this embodiment, two sliding grooves are provided on the same side of the mounting groove 11.

[0033] The base 1 has a reserved groove 12, which is symmetrically arranged along the through direction of the mounting groove 11, and the reserved groove 12 is connected to the mounting groove 11.

[0034] Reference Figure 3 The bidirectional lead screw 2 has an annular groove 21 in the middle. The threads at both ends of the bidirectional lead screw 2 are symmetrically arranged with the annular groove 21 as the axis. The base 1 is equipped with a support seat, which is located in the mounting groove 11. An arc groove 411 is opened through one side of the support seat. When the bidirectional lead screw 2 is assembled on the support seat, the groove wall of the annular groove 21 fits against the groove wall of the arc groove 411.

[0035] The top wall of the support base is provided with a placement groove 412, which is located at the top of the arc-shaped groove 411. The placement groove 412 is connected to the arc-shaped groove 411. The opening of the placement groove 412 away from the arc-shaped groove 411 is not smaller than the opening of the arc-shaped groove 411 near the placement groove 412. The arc-shaped groove 411 is semi-circular. When installing the bidirectional lead screw 2, the placement groove 412 guides the installation direction of the bidirectional lead screw 2, making it easier to place the bidirectional lead screw 2 into the arc-shaped groove 411.

[0036] Reference Figure 4 The support base includes a mounting plate 4 and a support plate 41. The mounting plate 4 is detachably connected to the base 1. In a preferred embodiment, the mounting plate 4 is fixed to the base 1 by screws. The bottom wall of the support plate 41 is fixedly connected to the top wall of the mounting plate 4. The arc-shaped groove 411 and the placement groove 412 are both formed on the support plate 41.

[0037] Refer to 1 and Figure 3 The area of ​​the clamping surface of clamp 3 is larger than the area of ​​the side of clamp 3 away from the clamping surface, so that clamp 3 has a larger contact area and a more stable clamping force when clamping the workpiece, effectively preventing the workpiece from sliding or shifting during processing.

[0038] The top wall of the clamp 3 is integrally formed with a scale 31. The scale 31 has a zero mark on the side away from the clamp 3. The scale line of the zero mark is located in the same vertical plane as the rotation axis of the bidirectional lead screw 2. Therefore, when measuring the size of the workpiece or adjusting the clamping position, the relevant data can be read directly through the scale 31 with the rotation axis of the bidirectional lead screw 2 as the reference, which improves the accuracy of measurement and the convenience of operation, and reduces the measurement error caused by inconsistent reference.

[0039] Furthermore, to more intuitively determine whether the workpiece is centered by comparing the scale values ​​on both sides of the zero mark, the scale value of the ruler 31 is positive at both ends of the zero mark, reducing the judgment interference caused by the concept of positive and negative values. Users do not need to perform additional numerical conversion or calculation, and can clearly see at a glance whether the workpiece is in the center position.

[0040] Along the scale direction of the scale 31, the edge of the scale 31 is provided with toothed grooves 311, and the adjacent positions of adjacent toothed grooves 311 are outwardly pointed. The pointed positions of adjacent toothed grooves 311 correspond to the midpoint of adjacent integer scale values ​​on the scale 31, forming a clear indicator mark visually, which makes it convenient for operators to quickly locate and read the scale, and greatly improves work efficiency.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A self-centering vise, characterized in that, The device includes a base (1), a bidirectional lead screw (2), and a clamp (3). The base (1) has an installation groove (11). The bidirectional lead screw (2) is located in the installation groove (11) and is rotatably mounted on the base (1). The clamp (3) is threadedly matched with the bidirectional lead screw (2). The clamp (3) is symmetrically arranged at both ends of the bidirectional lead screw (2). The side wall of the installation groove (11) has a sliding groove. The sliding groove includes a rounded V-shaped groove (111). The clamp (3) is slidably connected to the base (1) through the rounded V-shaped groove (111). The bottom wall of the installation groove (11) has an installation hole (112).

2. The self-centering vise according to claim 1, characterized in that, The bidirectional lead screw (2) has an annular groove (21) in the middle position. The base (1) is equipped with a support seat, and the support seat has an arc groove (411). The groove wall of the annular groove (21) fits into the groove wall of the arc groove (411).

3. A self-centering vise according to claim 2, characterized in that, The top wall of the support base is provided with a placement groove (412), the placement groove (412) is located at the top of the arc groove (411), the placement groove (412) is connected to the arc groove (411), and the opening of the placement groove (412) away from the arc groove (411) is not smaller than the opening of the arc groove (411) near the placement groove (412).

4. A self-centering vise according to claim 2, characterized in that, The arc-shaped groove (411) is semi-circular.

5. A self-centering vise according to claim 2, characterized in that, The support base includes a mounting plate (4) and a support plate (41). The mounting plate (4) is detachably connected to the base (1). The bottom of the support plate (41) is connected to the top of the mounting plate (4). The arc groove (411) is formed in the support plate (41).

6. A self-centering vise according to claim 1, characterized in that, The clamp (3) is equipped with a scale (31), the scale (31) has a zero mark, and the scale line of the zero mark is located in the same vertical plane as the rotation axis of the bidirectional lead screw (2).

7. A self-centering vise according to claim 6, characterized in that, The scale values ​​of the ruler (31) are all positive numbers at both ends of the zero mark.

8. A self-centering vise according to claim 6, characterized in that, Along the scale direction of the scale (31), the edge of the scale (31) is provided with toothed grooves (311), and the adjacent positions of the adjacent toothed grooves (311) are outwardly flared.

9. A self-centering vise according to claim 8, characterized in that, The tip of an adjacent tooth (311) corresponds to the midpoint of an adjacent integer scale value on a ruler (31).

10. A self-centering vise according to claim 1, characterized in that, The area of ​​the clamping surface of the clamp (3) is larger than the area of ​​the side of the clamp (3) away from the clamping surface.

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