CN216298593U

CN216298593U - Eccentric clamping device

Info

Publication number: CN216298593U
Application number: CN202122519008.7U
Authority: CN
Inventors: 邓振华; 熊朝
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-15
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses an eccentric clamping device which comprises a bottom plate and a base arranged on the bottom plate, wherein a first inclined surface is arranged at the top of the base, a clamping block is obliquely arranged on the first inclined surface, the clamping block is movably connected with the base through an eccentric screw rod, a threaded hole matched with the eccentric screw rod is arranged in the base, and the eccentric screw rod rotates in the threaded hole, so that the clamping block slides on the first inclined surface, and a workpiece placed on the bottom plate is laterally clamped; the eccentric screw is vertically connected with the compaction block and comprises a circular shoulder and a screw portion, wherein the circular shoulder and the screw portion are connected with different shafts. The eccentric clamping device has the advantages of simple structure, space saving, convenient operation and low cost, and can quickly, conveniently and powerfully clamp the workpiece in the lateral direction.

Description

Eccentric clamping device

Technical Field

The utility model relates to the technical field of machining, in particular to an eccentric clamping device.

Background

In machining, after a workpiece is positioned, the workpiece needs to be fixed by a proper clamping mechanism, so that the workpiece always keeps a correct position and bears the action of cutting force and the like. At present, casing class part adds man-hour, and the processing of casing class part first process often fixes a position with two hair side edges on the work piece, and two other sides press from both sides tightly, and the clamping form that adopts the side to hold tightly is various, but most of side clamping mechanism designs comparatively complicacy, manufacturing cost is high, take up space big, and some because the point contact easily leads to the work piece to warp, and the operation in addition is not convenient enough. And occupies a large space, which may affect the layout of other components.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems existing in the prior art, the utility model aims to provide an eccentric clamping device to solve the problems existing in side holding.

In order to achieve the purpose, the utility model discloses the following technical scheme:

an eccentric clamping device comprises a bottom plate and a base arranged on the bottom plate, wherein a first inclined surface is arranged at the top of the base, a clamping block is obliquely arranged on the first inclined surface, the clamping block is movably connected with the base through an eccentric screw rod, a threaded hole matched with the eccentric screw rod is formed in the base, and the eccentric screw rod rotates in the threaded hole, so that the clamping block slides on the first inclined surface, and a workpiece placed on the bottom plate is laterally clamped;

the eccentric screw is vertically connected with the compaction block and comprises a circular shoulder and a screw portion, wherein the circular shoulder and the screw portion are connected with different shafts.

Furthermore, the squeezing block is provided with a through hole matched with the circular shoulder, the height of the through hole is higher than that of the circular shoulder, and the inner diameter of the through hole is larger than that of the circular shoulder.

Specifically, the prism-like structure is composed of a plurality of continuous triangular grooves.

More specifically, the distance between two adjacent triangular grooves is 1.8mm, the grooving angle of the triangular grooves is 80-85 degrees, and the depth of the triangular grooves is 1 mm.

More specifically, the squeezing block is provided with a second inclined surface opposite to the prism-shaped structure.

Preferably, the distance between the central axis of the circular shoulder portion and the central axis of the screw portion is 0.8 mm.

Furthermore, the inclination angle of the first inclined plane is 8-10 degrees, and the maximum sliding distance of the squeezing block on the first inclined plane is 1.6 mm.

Specifically, the axial direction of the threaded hole is perpendicular to the first inclined plane, 1 bolt hole is respectively arranged on each of the two sides of the threaded hole, and the base and the bottom plate are fixed in the bolt holes through bolts.

Compared with the prior art, the utility model has the following beneficial effects:

the eccentric clamping device has the following characteristics: 1. the blank surface (black surface can also be correspondingly) and the finish machining surface of the workpiece can be firmly clamped downwards by rotating the clamping opening; 2. the eccentric cam bolt is adopted, so that the workpiece can be clamped quickly and strongly; 3. when the back surface (a second inclined surface) of the squeezing block is used as a jacking surface, the clamping device can be used as a limiter; 4. the clamping direction used is the right swivel direction. The eccentric clamping device has the advantages of simple structure, space saving, convenient operation and low cost, and can quickly, conveniently and powerfully clamp the workpiece in the lateral direction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a cross-sectional view of the eccentric holder of the present invention;

FIG. 2 is a top view of the eccentric holder of the present invention;

FIG. 3 is a perspective view of the eccentric clamping unit of the present invention;

FIG. 4 is a schematic structural view of a packing block;

FIG. 5 is a schematic cross-sectional view of the clamping block;

FIG. 6 is a schematic sectional view of an eccentric screw;

FIG. 7 is a schematic perspective view of an eccentric screw;

FIG. 8 is a perspective view of the base;

FIG. 9 is a cross-sectional view of the base;

FIG. 10 is a cross-sectional view taken along plane A-A of the base;

FIG. 11 is a cross-sectional view taken along plane B-B of the base;

the reference numerals in the figures denote:

1. a workpiece; 2. a base plate; 3. a compaction block; 3-1, prism structure; 3-1-1, triangular grooves; 3-2, through holes; 3-3, a second inclined plane; 4. an eccentric screw; 4-1, round shoulder; 4-2, a screw part; 5. a base; 5-1, a first inclined plane; 5-2, a threaded hole; 5-3, bolt holes; 6. and (4) bolts.

Detailed Description

It should be noted that when the present invention is described in an orientation, the terms "upper end", "lower end", and the like indicate an orientation or positional relationship only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. If the particular gesture changes, the directional indication changes accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that the number of technical features indicated is significant. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the utility model, the workpiece can be a shell type part needing lateral clamping or limiting.

Example 1

With reference to fig. 1 to 3, the embodiment provides an eccentric clamping device, which includes a bottom plate 2 and a base 5 disposed on the bottom plate 2, wherein a first inclined surface 5-1 is disposed on the top of the base 5, a tightening block 3 is disposed on the first inclined surface 5-1, the tightening block 3 is movably connected to the base 5 through an eccentric screw 4, a threaded hole 5-2 (not shown in a thread diagram on the threaded hole 5-2) is disposed in the base 5, which is matched with the eccentric screw 4, and the eccentric screw 4 rotates in the threaded hole 5-2, so that the tightening block 3 slides on the first inclined surface 5-1, thereby laterally clamping a workpiece 1 disposed on the bottom plate 2; the lateral clamping means that the side surface of the clamping block 3 is attached to the side surface of the workpiece 1, and is perpendicular to the plane of the base plate 2, so that the clamping is performed from the side surface direction of the workpiece.

The method comprises the following steps: the eccentric screw rod 4 is used for controlling the position of the extrusion block 3 to move, and when the eccentric screw rod 4 screws the extrusion block 3 at different angles, the extrusion block 3 is fixed at different positions, so that the workpiece 1 is laterally clamped according to the appearance of the workpiece 1.

As shown in fig. 4-5, the squeezing block 3 is provided with a prismatic structure 3-1 contacting with the workpiece 1, the end face of the prismatic structure is perpendicular to the bottom plate, the eccentric screw 4 is perpendicularly connected with the squeezing block 3, and the eccentric screw 4 comprises a circular shoulder 4-1 and a screw part 4-2 which are connected with each other by different shafts. The screw thread on the screw portion 4-2 is not shown in the drawing. The sides of the prismatic structure 3-1 are perpendicular to the plane of the base plate 2.

Furthermore, a through hole 3-2 matched with the circular shoulder 4-1 is formed in the squeezing block 3, the height of the through hole 3-2 is higher than that of the circular shoulder 4-1, and the inner diameter of the through hole 3-2 is larger than that of the circular shoulder 4-1. The method specifically comprises the following steps: the inner diameter of the through hole 3-2 is phi 12.7, and the inner diameter of the circular shoulder 4-1 is phi 12.5. After the eccentric screw rod 4 passes through the through hole 3-2, the circular shoulder 4-1 of the eccentric screw rod 4 just falls into the through hole 3-2, so that the rotation adjustment is convenient.

Specifically, the prism-like structure 3-1 is composed of a plurality of continuous triangular grooves 3-1-1. The prismatic structure 3-1 facilitates clamping of workpieces 1 of different shapes.

More specifically, the distance between two adjacent triangular grooves 3-1-1 is 1.8mm, the grooving angle of the triangular grooves 3-1-1 is 80-85 degrees, specifically 82 degrees, and the depth of the triangular grooves 3-1-1 is 1 mm.

More specifically, the squeezing block 3 is provided with a second inclined surface 3-3 opposite to the prism-shaped structure 3-1. The second inclined plane 3-3 is arranged for limiting the workpiece; therefore, when the direction of the squeezing block 3 is changed for use, the second inclined plane 3-3 can also be used as a limiter; the inclination angles of the prism-shaped structure 3-1 and the second inclined plane 3-3 are both 10 degrees. The specific inclination angle can be modified and set according to the actual situation.

As shown in FIGS. 6 to 7, the distance between the central axis of the circular shoulder 4-1 and the central axis of the screw portion 4-2 is 0.8 mm. Therefore, the eccentric screw 4 can make the maximum slidable 2S of the squeezing block 3 on the first inclined surface 5-1 of the base 5 equal to 1.6 mm.

Further, as shown in FIGS. 8 to 11, the first inclined surface 5-1 may have an inclination angle of 8 to 10 °, for example, 9 °. The specific inclination angle can be modified and set according to the actual situation.

The maximum sliding distance of the compaction block 3 on the first inclined surface 5-1 is 1.6 mm. The maximum horizontal movement of the clamping device is 2S × cos9 ° -1.58 mm, which meets the requirement that the clamping device clamps the workpiece 1 according to the shape of the workpiece 1.

In this embodiment, the threaded hole 5-2 is axially perpendicular to the first inclined surface 5-1, 1 bolt hole 5-3 is respectively disposed on two sides of the threaded hole 5-2, and the base 5 and the bottom plate 2 are fixed in the threaded hole 5-3 by using a bolt 6.

In summary, the eccentric clamping device of the present invention is used as follows:

1. fixing the base 5 on the bottom plate 2 by using 2M 6X20 cylindrical head bolts 6;

2. sleeving the eccentric screw 4 into the compaction block 3;

3. the prismatic structure 3-1 of the extrusion block 3 is close to the workpiece 1, and simultaneously, the M10-6g screw rod of the eccentric screw rod 4 is screwed into the threaded hole 5-2M10-7H in the base 5;

4. the eccentric screw 4 is screwed down in the base 5 until the workpiece 1 can be completely clamped by the gripper.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. An eccentric clamping device is characterized by comprising a base plate (2) and a base (5) arranged on the base plate (2), wherein a first inclined surface (5-1) is arranged at the top of the base (5), a clamping block (3) is obliquely arranged on the first inclined surface (5-1), the clamping block (3) is movably connected with the base (5) through an eccentric screw (4), a threaded hole (5-2) matched with the eccentric screw (4) is formed in the base (5), and the eccentric screw (4) rotates in the threaded hole (5-2) so that the clamping block (3) slides on the first inclined surface (5-1) to laterally clamp a workpiece (1) placed on the base plate (2);

the extruding and tightening block (3) is provided with a prismatic structure (3-1) which is contacted with the workpiece (1), the end face of the prismatic structure (3-1) is perpendicular to the bottom plate (2), the eccentric screw (4) is perpendicularly connected with the extruding and tightening block (3), and the eccentric screw (4) comprises a circular shoulder (4-1) and a screw part (4-2) which are connected with each other through different shafts.

2. The eccentric clamping device according to claim 1, characterized in that the through hole (3-2) of the clamping block (3) is matched with the circular shoulder (4-1), the height of the through hole (3-2) is higher than that of the circular shoulder (4-1), and the inner diameter of the through hole (3-2) is larger than that of the circular shoulder (4-1).

3. Eccentric clamping device according to claim 1, characterized in that the prism-like structure (3-1) consists of a plurality of connecting triangular grooves (3-1-1).

4. The eccentric clamping device according to claim 3, characterized in that the distance between two adjacent triangular grooves (3-1-1) is 1.8mm, the grooving angle of the triangular grooves (3-1-1) is 80-85 degrees, and the depth of the triangular grooves (3-1-1) is 1 mm.

5. Eccentric clamping device according to claim 1, characterized in that the clamping block (3) is provided with a second bevel (3-3) opposite the ridge (3-1).

6. Eccentric clamping device according to claim 2, characterised in that the distance between the central axis of the circular shoulder (4-1) and the central axis of the screw part (4-2) is 0.8 mm.

7. The eccentric clamping device according to claim 1, characterized in that the first inclined plane (5-1) has an inclination of 8-10 °, the maximum distance the clamping block (3) slides on the first inclined plane (5-1) being 1.6 mm.

8. The eccentric clamping device according to claim 1, characterized in that the threaded hole (5-2) is axially perpendicular to the first inclined plane (5-1), 1 bolt hole (5-3) is respectively arranged on both sides of the threaded hole (5-2), and a bolt (6) is used in the bolt hole (5-3) to fix the base (5) and the bottom plate (2).