CN210307310U

CN210307310U - Grinding machine chuck of quick centering

Info

Publication number: CN210307310U
Application number: CN201920995640.9U
Authority: CN
Inventors: 李京
Original assignee: Chongqing Jingzhun Printing Plate Co ltd
Current assignee: Chongqing Jingzhun Printing Plate Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-04-14
Anticipated expiration: 2029-06-28

Abstract

The utility model provides a grinding machine chuck capable of realizing rapid centering, which comprises a fixed ring and a movable ring, wherein the movable coaxial ring is sleeved outside the fixed ring, and the inner wall of the movable ring is an inner conical surface; the fixed ring is provided with at least two clamping blocks in a radial sliding manner, one ends of the clamping blocks extend into the fixed ring, the other ends of the clamping blocks are provided with outer conical surfaces matched with the inner conical surfaces, and the clamping blocks are axially connected with the inner wall of the movable ring in a sliding manner; one end of the movable ring is elastically connected with the fixed ring, and the other end of the movable ring is abutted with a locking ring in threaded connection with the fixed ring. In the grinding machine chuck of the utility model, the locking ring is in threaded connection with the fixed ring, and the clamping block can be radially moved by rotating the locking ring through the movable ring so as to clamp or loosen a workpiece; the workpiece can be clamped or loosened only by rotating one part of the locking ring, so that the operation is simple and the efficiency is high; and after the workpiece is clamped, the central axis of the workpiece is collinear with that of the fixing ring, so that the workpiece is centered quickly.

Description

Grinding machine chuck of quick centering

Technical Field

The utility model belongs to the technical field of the grinding machine anchor clamps, concretely relates to grinding machine chuck of quick centering.

Background

A grinding machine is a machine tool that grinds a surface of a workpiece using a grinding tool, and when the grinding machine machines a shaft-type or rotor-type workpiece (e.g., a printing roll shaft), a workpiece rotating shaft of the grinding machine fixes the workpiece by a grinding chuck, and the workpiece rotates along with the workpiece rotating shaft, thereby machining the workpiece.

The fixture that adopts the area round hole among the prior art mostly overlaps on the work piece, and the work piece is fixed to the radial bolt that sets up of cooperation, like the patent that publication number is CN203579405U, discloses a grinding machine chuck, including the grinding machine chuck ring, radial spiro union has two clamping bolt that the interval set up on the grinding machine chuck ring, articulated have a clamping handle, and the one end that presss from both sides the clamping handle stretches into in the grinding machine chuck ring, the other end extends to the grinding machine chuck ring outer handle and is connected with tension spring, the arcwall face of clamping handle on be provided with the concave-convex structure of increase frictional force.

The above scheme mainly has the following problems: 1) the workpiece is clamped through the clamping bolt and the clamping handle, and the function of aligning the central axis of the workpiece is not achieved; 2) when workpieces with different diameters are machined, the three parts of the two clamping bolts and the clamping handle need to be adjusted at the same time in one-time clamping, and the operation is complex.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a grinding machine chuck of quick centering.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a grinding machine chuck capable of being centered quickly comprises a fixed ring and a movable ring, wherein the movable coaxial ring is sleeved outside the fixed ring, and the inner wall of the movable ring is an inner conical surface; the fixed ring is provided with at least two clamping blocks in a radial sliding mode, one ends of the clamping blocks extend into the fixed ring, the other ends of the clamping blocks are provided with outer conical surfaces matched with the inner conical surfaces, and the clamping blocks are axially connected with the inner wall of the movable ring in a sliding mode; one end of the movable ring is directly or indirectly elastically connected with the fixed ring through an elastic piece, the other end of the movable ring is abutted with the locking ring, and the locking ring is in threaded connection with the fixed ring.

In the technical scheme, the locking ring is in threaded connection with the fixing ring, the locking ring is rotated to enable the moving ring to move axially, and the moving ring is matched with the clamping block in a conical surface manner, so that the moving ring moves axially to enable the clamping block to move radially; the moving speed and the distance of the clamping block are equal, and the moving ring and the fixing ring are coaxially arranged, so that after the workpiece is fixed by the clamping block, the central axis of the workpiece is collinear with the central axis of the fixing ring, and the workpiece is quickly centered.

The grinding machine chuck of the utility model can clamp or loosen a workpiece only by rotating one part of the locking ring, and has simple operation and high efficiency; and after the workpiece is clamped, the central axis of the workpiece is collinear with that of the fixing ring, so that the workpiece is centered quickly.

In a preferred embodiment of the present invention, the clamping block has a concave-convex structure for increasing friction at an end close to the center of the fixing ring. Therefore, the friction force between the clamping block and the workpiece is increased, and the workpiece is prevented from slipping.

In a preferred embodiment of the present invention, the concave-convex structure is a plurality of clamping teeth, or the concave-convex structure is a plurality of strip-shaped grooves or strip-shaped protrusions arranged along the length direction of the fixing ring, or the concave-convex structure is a mesh-shaped concave pattern.

In a preferred embodiment of the present invention, the fixing ring is fixed to a connecting block, one end of the elastic member is fixed to the connecting block, and the other end of the elastic member is fixed to the moving ring.

In another preferred embodiment of the present invention, the number of the clamping blocks is three or four, and three or four clamping blocks are circumferentially and uniformly arranged on the fixing ring. The number of the clamping blocks is reasonable, force is applied at multiple positions, and compared with the two clamping blocks, the locking effect is better; the clamping blocks are uniformly arranged in the circumferential direction, the clamping force applied to each position of the workpiece is equal, and the stress is uniform.

In a preferred embodiment of the present invention, the small end of the inner conical surface is disposed near the locking ring. Thereby rotating the lock ring to make the movable block compress the elastic piece to axially slide so as to clamp the workpiece.

In another preferred embodiment of the present invention, the elastic member is a compression spring. The pressure spring is easy to obtain, low in cost and high in reliability.

In another preferred embodiment of the present invention, the locking ring is provided with a plurality of side wings. Therefore, the locking ring can be conveniently rotated by a worker through the side wings, the labor is saved, and the operation is convenient.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic cross-sectional view of a grinder chuck for rapid centering according to the present invention.

Fig. 2 is a schematic view showing a state where a workpiece is placed in the retainer ring of the grinder chuck according to the present invention.

Fig. 3 is a schematic view of a state in which the grinding machine chuck of the present invention is used to clamp a workpiece.

Reference numerals in the drawings of the specification include: the clamping device comprises a fixing ring 1, a sliding groove 11, a clamping block 2, a concave-convex structure 21, a connecting block 3, a moving ring 4, an inner conical surface 41, a locking ring 5, a side wing 51 and an elastic piece 6.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The utility model provides a grinding machine chuck of quick centering, as shown in FIG. 1 the utility model discloses an among the preferred embodiment, it is including solid fixed ring 1 and

shift ring

4, and 4 coaxial covers of shift ring are established outside solid fixed ring 1, and the inner wall of shift ring 4 is interior conical surface 41, and the main aspects of preferred interior conical surface 41 are located the left side, and the tip of interior conical surface 41 is located the right side. At least two clamping blocks 2 are radially arranged on the fixing ring 1 in a sliding mode, a radial sliding groove 11 can be formed in the fixing ring 1 specifically, the clamping blocks 2 radially slide in the sliding groove 11, preferably, the number of the clamping blocks 2 is three or four, the three or four clamping blocks 2 are circumferentially and uniformly arranged on the fixing ring 1, and the size and the structure of each clamping head are the same.

One end of the clamping block 2 extends into the fixed ring 1, the other end of the clamping block 2 is provided with an outer conical surface matched with the inner conical surface 41 of the movable ring 4, the clamping block 2 is axially and slidably connected with the inner wall of the movable ring 4, namely, when the movable ring 4 axially moves (moves left and right in figure 1), the clamping block 2 can slide on the inner conical surface 41 of the movable ring 4, and the clamping block 2 is radially and slidably connected with the fixed ring 1, so that when the movable ring 4 axially moves, the clamping block 2 can radially move, and a workpiece is clamped or loosened. Specifically, a clamping groove can be formed in the inner wall of the movable ring 4, and a clamping column matched with the clamping groove is formed in the clamping block 2, so that the clamping block 2 is clamped on the inner wall of the movable ring 4 and can axially slide relative to the inner wall.

The left end of shift ring 4 is through elastic component 6 direct or indirect and solid fixed ring 1 elastic connection, in this embodiment, as shown in fig. 1, preferably on solid fixed ring 1 rigid coupling have connecting block 3, the left end of elastic component 6 and the right-hand member welding of connecting block 3, the right-hand member of elastic component 6 and the left end welding of shift ring 4, the preferred pressure spring of elastic component 6, namely column compression spring. The right end of the movable ring 4 is abutted with a locking ring 5, the locking ring 5 is sleeved outside the fixing ring 1, the outer wall of the fixing ring 1 is provided with an external thread, and the inside of the locking ring 5 is provided with an internal thread matched with the external thread, so that the locking ring 5 is in threaded connection with the fixing ring 1; the locking ring 5 is thereby rotated to axially move (i.e., move left and right) the shift ring 4. In practice, in order to rotate the locking ring 5, a plurality of side wings 51 may be provided on the outer wall of the locking ring 5, and of course, the locking ring 5 may be rotated by providing a handle.

It should be noted that the large end of the inner conical surface 41 of the moving ring 4 can be arranged on the right side and the small end of the inner conical surface 41 on the left side, and in this case, the elastic member 6 is a tension spring.

In another preferred embodiment of the present invention, as shown in fig. 1, the end of the clamping block 2 near the center of the fixing ring 1 has a concave-convex structure 21 for increasing the friction force. Specifically, the concave-convex structure 21 may be a plurality of clamping teeth arranged on the clamping block 2, that is, one end of the clamping block 2 extending into the fixing ring 1 has a wavy surface; the concave-convex structure 21 may also be a plurality of strip-shaped grooves or strip-shaped protrusions arranged along the length direction of the fixing ring 1, and of course, the concave-convex structure 21 may also be a mesh concave pattern, as long as the concave-convex structure 21 can increase the friction force between the clamping block 2 and the workpiece, which is not illustrated here.

In practical application, two sets of the grinding machine chucks are arranged on the grinding machine, and two ends of a workpiece are respectively clamped by the two sets of the grinding machine chucks. The grinding machine chuck can be coaxially connected with a workpiece rotating shaft of a grinding machine in a bolt mode, and the workpiece rotating shaft can be coaxially connected with the fixing ring 1 or the connecting block 3 through a bolt.

The specific implementation process is as follows: after the grinding machine chuck is installed on a grinding machine, taking the left end of the workpiece as an example for clamping, as shown in fig. 2, the left end of the workpiece is placed in a fixed ring 1 and is positioned in an area formed by a plurality of clamping blocks 2; then, the locking ring 5 is rotated to move the locking ring 5 leftward, as shown in fig. 3, the locking ring 5 causes the movable ring 4 to slide leftward by compressing the elastic member 6, and the clamp block 2 and the movable ring 4 are in conical engagement, so that the movable ring 4 slides leftward to cause the clamp block 2 to slide toward the center of the fixed ring 1 to approach the workpiece, thereby clamping the workpiece. After the workpiece is machined on the grinding machine, the locking ring 5 is rotated reversely, the locking ring 5 moves rightwards, the compressed elastic piece 6 recovers deformation, the elastic piece 6 enables the moving ring 4 to move rightwards and abut against the locking ring 5, the moving ring 4 moves rightwards, the clamping block 2 slides outwards the fixing ring 1 and is far away from the workpiece, and therefore the workpiece is loosened.

The workpiece extends into the fixed ring 1, when the locking ring 5 is rotated to enable the clamping blocks 2 to move towards the circle center of the fixed ring 1, the moving speeds and distances of the plurality of clamping blocks 2 are equal, and the moving ring 4 and the fixed ring 1 are coaxially arranged, so that after the clamping blocks 2 fix the workpiece, the central axis of the workpiece is collinear with the central axis of the fixed ring 1, and the fixed ring 1 is coaxially connected with the workpiece rotating shaft, so that the central axis of the workpiece is collinear with the central axis of the workpiece rotating shaft, and the workpiece is quickly centered; and the clamping block 2 is close to or far away from the circle center of the fixed ring 1 through the axial movement of the movable ring 4, so that the grinding machine chuck can clamp various workpieces with different diameters.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A grinding machine chuck capable of being centered quickly is characterized by comprising a fixed ring and a movable ring, wherein the movable coaxial ring is sleeved outside the fixed ring, and the inner wall of the movable ring is an inner conical surface; the fixed ring is provided with at least two clamping blocks in a radial sliding mode, one ends of the clamping blocks extend into the fixed ring, the other ends of the clamping blocks are provided with outer conical surfaces matched with the inner conical surfaces, and the clamping blocks are axially connected with the inner wall of the movable ring in a sliding mode; one end of the movable ring is directly or indirectly elastically connected with the fixed ring through an elastic piece, the other end of the movable ring is abutted with the locking ring, and the locking ring is in threaded connection with the fixed ring.

2. The machine chuck as claimed in claim 1, wherein the clamping block has a friction-increasing relief at the end thereof adjacent the center of the retaining ring.

3. The machine chuck as claimed in claim 2, wherein the relief structure is a plurality of gripping teeth, or the relief structure is a plurality of grooves or protrusions arranged along the length of the holding ring, or the relief structure is a network of grooves.

4. The rapid centering grinder chuck according to claim 1, wherein the fixing ring is fixedly connected with a connecting block, one end of the elastic member is fixedly connected with the connecting block, and the other end of the elastic member is fixedly connected with the movable ring.

5. The machine chuck as in claim 1, wherein the small end of said internal taper is disposed adjacent said locking ring.

6. The rapidly centering machine chuck as claimed in claim 5, wherein said resilient member is a compression spring.

7. The machine chuck as claimed in claim 1, wherein the number of said clamping blocks is three or four, and three or four clamping blocks are circumferentially uniformly provided on said retaining ring.

8. A rapid centering grinding machine chuck according to any one of claims 1 to 7, wherein said locking ring is provided with a plurality of shoulders.