CN221696611U - Clamping device in ring-shaped part internal support form - Google Patents

Abstract

The utility model relates to a clamping device in an annular part internal support form, which belongs to the technical field of clamping, and comprises: an axis; a pusher block having a first side and being movable axially along the axis; a plurality of clamping blocks which are provided with a second side surface and can move along the radial direction of the axis, wherein the plurality of clamping blocks are arranged around the circumferential direction of the axis; the first side face faces the second side face, at least one of the first side face and the second side face is an inclined face forming an included angle with the axis, and the first side face and the second side face at least partially overlap along the axial direction of the axis; with the axial movement of the pushing block along the axis, the first side surface can be abutted against the second side surface, and under the action of the inclined surface, the axial force from the first side surface is converted into the radial force applied to the second side surface, so that the clamping blocks move along the radial direction of the axis, and the clamping blocks move to the clamping position, and in the clamping position, the clamping blocks form a clamping pattern with a preset shape.

Description

A clamping device in the form of an inner support for an annular part

Technical Field

The utility model relates to the technical field of clamping, in particular to a clamping device in the form of an inner support for an annular part.

Background Art

Before machining a workpiece, the workpiece needs to be fixed to ensure the accuracy of the machining position.

For hollow thin-walled parts, such as cylindrical parts, the shape will change slightly after forming due to the elastic deformation of the material, such as from a circle to an ellipse. If ordinary clamping devices are used for clamping, although the parts can be fixed in a certain position as a whole, the deformation of the parts themselves will cause deviations in the local position of the parts, affecting the processing quality.

Utility Model Content

The purpose of the embodiment of the utility model is to provide a clamping device in the form of an annular part inner support, which can reduce the deformation of the part itself as much as possible while clamping the part.

To achieve the above-mentioned purpose, the embodiment of the utility model provides a clamping device in the form of an annular part inner support, the clamping device comprising:

axis;

A push block having a first side surface and movable axially along the axis;

A plurality of clamping blocks having a second side surface and movable in the radial direction of the axis, wherein the plurality of clamping blocks are arranged in a circumferential direction around the axis;

The first side surface faces the second side surface, at least one of the first side surface and the second side surface is an inclined surface forming an angle with the axis, and along the axial direction of the axis, the first side surface and the second side surface at least partially overlap;

As the push block moves axially along the axis, the first side surface can abut against the second side surface and, under the action of the inclined surface, convert the axial force from the first side surface into a radial force applied to the second side surface, so that the multiple clamping blocks move radially along the axis, so that the multiple clamping blocks move to the clamping position, and at the clamping position, the multiple clamping blocks form a clamping pattern with a preset shape.

In some embodiments, the clamping block is further provided with an arc-shaped clamping groove whose center is on the axis, and the clamping figure is a circle whose center is on the axis.

In some embodiments, both the first side surface and the second side surface are inclined surfaces forming an angle with the axis.

In some embodiments, the clamping device further includes: a supporting surface, and the clamping block is movably disposed on the supporting surface.

In some embodiments, a guide block is fixedly provided on the support surface, and a guide groove corresponding to the guide block is provided on the clamping block. The guide groove extends radially along the axis, and when the clamping block moves radially along the axis, the guide groove and the guide block move relative to each other.

In some embodiments, an elastic element is disposed between the guide block and the clamping block, and the elastic element applies a force toward the axis to the clamping block.

In some embodiments, the pushing block is located on one side of the supporting surface, and a force-applying component for applying an axial force along the axis to the pushing block is connected to the pushing block.

In some embodiments, the clamping device further comprises:

A fixed seat, the supporting surface is located on the fixed seat, a threaded hole parallel to the axis is provided on the fixed seat, a through hole corresponding to the threaded hole is provided on the push block, the force-applying component includes a screw rod and a nut connected to the screw rod, the screw rod can pass through the through hole and be threadedly connected to the threaded hole, the diameter of the nut is larger than the diameter of the through hole, and when the screw rod rotates in the threaded hole, the nut can apply an axial force along the axis to the push block.

In some embodiments, a guide sleeve with upper and lower openings and a hollow interior is provided in the through hole, the screw rod is inserted into the guide sleeve, and the push block is sleeved outside the guide sleeve.

Compared with the prior art, the beneficial effect of the embodiment of the utility model is that when the push block moves axially along the axis, it can drive multiple clamping blocks to move radially along the axis, so that multiple clamping blocks move to the clamping position, and in the clamping position, multiple clamping blocks form a clamping pattern with a preset shape, wherein the shape of the clamping pattern matches the design shape of the part, so that when the part is clamped by multiple clamping blocks, the part is kept in the design shape, for example, the shape of the part is calibrated. Therefore, the clamping device of this embodiment can solve the technical problem that the deformation of the part causes the change of the local shape of the part and affects the processing quality.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a clamping device in the form of an inner support for an annular part provided in an embodiment of the utility model.

FIG. 2 is an exploded view of a clamping device in the form of an annular part inner support provided in an embodiment of the utility model.

FIG. 3 is a top view of a clamping device in the form of an annular part inner support provided in an embodiment of the utility model.

Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3 .

FIG. 5 is a schematic diagram showing that the push block provided in the embodiment of the utility model moves downward and the clamping block moves leftward.

FIG6 is a schematic diagram showing that the push block provided in the embodiment of the utility model moves upward and the clamping block moves rightward.

In the figure:

1. Push block; 11. First side surface; 12. Through hole;

2. Clamping block; 21. Second side surface; 22. Guide groove; 23. Clamping groove;

3. Base; 31. Support surface; 32. Threaded hole; 33. Connection hole;

4. Guide block; 41. Limiting part;

5. Elastic element;

6. force-applying component; 61. screw rod; 62. nut;

7. Guide sleeve;

L. Axis.

DETAILED DESCRIPTION

The technical solution of the utility model is further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

Some directional words are defined in the present utility model. Unless otherwise specified, the directional words used, such as "up", "down", "left", "right", "inside" and "outside", are used for ease of understanding and therefore do not constitute limitations on the protection scope of the present utility model.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In this embodiment, unless otherwise specified, the direction between the elements is based on the axis L as a reference.

The axial direction of the axis L is defined as: a direction parallel to the axis L.

The circumferential direction of the axis L is defined as: the direction obtained by rotating in a plane perpendicular to the axis L with a point on the axis L as the center of the circle.

The radial direction of the axis L is defined as the direction pointing toward or away from a point on the axis L in a plane perpendicular to the axis L.

FIG1 shows a schematic diagram of a clamping device (hereinafter referred to as the clamping device) in the form of an annular part inner support provided in this embodiment. FIG2 shows an exploded view of the clamping device in FIG1. As shown in FIG2, the clamping device includes a base 3, a clamping block 2, a push block 1, and a virtual axis L. The upper surface of the base 3 is a horizontally extending support surface 31, and in this embodiment, the support surface 31 is perpendicular to the axis L. A plurality of clamping blocks 2 are arranged on the support surface 31 in the circumferential direction around the axis L, and the clamping block 2 can move on the support surface 31 along the radial direction of the axis L. The push block 1 is located above the support surface 31, and the push block 1 is located in the middle position surrounded by a plurality of clamping blocks 2. It can also be considered that the push block 1 is coaxially arranged with the axis L, and the push block 1 can move axially along the axis L.

In this embodiment, the plurality of clamping blocks 2 refers to more than two clamping blocks 2 , for example, six clamping blocks 2 are shown in FIG. 2 .

As shown in FIG. 2 , in this embodiment, the push block 1 is in the shape of an inverted truncated cone as a whole, so the push block 1 has an inclined first side surface 11. The end of the clamping block 2 close to the axis L is provided with an inclined second side surface 21, the second side surface 21 faces the first side surface 11, and the first side surface 11 and the second side surface 21 have the same inclination direction and inclination angle. In addition, in the axial direction of the axis L, the second side surface 21 at least partially overlaps with the first side surface 11, that is, when the push block 1 moves downward, the first side surface 11 can abut against the second side surface 21.

The clamping device is used as follows:

First, the hollow thin-walled parts to be clamped are placed on the periphery of a plurality of clamping blocks 2;

Next, the push block 1 moves downward along the axial direction of the axis L, so that the first side surface 11 abuts against the second side surface 21 and a force is generated between the first side surface 11 and the second side surface 21. Since the first side surface 11 and the second side surface 21 are both inclined surfaces, under the action of the inclined surfaces, the axial force on the first side surface 11 along the axis L is at least partially converted into a radial force along the axis L, and the radial force is transmitted to the second side surface 21, thereby pushing the second side surface 21 to move in a direction away from the axis L, that is, the clamping block 2 moves away from the axis L along the radial direction of the axis L, so that the clamping block 2 moves to the clamping position, and at the clamping position, a plurality of clamping blocks 2 form a clamping pattern with a preset shape, and the clamping pattern is consistent with the designed shape of the part;

Finally, the part is supported from the inside out by a plurality of clamping blocks 2 and maintained in the designed shape.

Therefore, the clamping device of this embodiment can not only clamp the parts, but also calibrate the shape of the parts while clamping, ensuring that the parts are consistent with the designed shape after clamping, and avoiding the shape of the parts being different from the designed shape due to the elastic deformation of the parts themselves.

It should be noted that, although in the present embodiment, the first side surface 11 and the second side surface 21 are both inclined surfaces, it can be understood that as long as one of the first side surface 11 or the second side surface 21 is an inclined surface, the conversion between the axial force and the radial force can be achieved. Therefore, at least one of the first side surface 11 and the second side surface 21 can be an inclined surface that forms an angle with the axis L.

In addition, it should be noted that, although in this embodiment, the shapes of the clamping blocks 2 are the same and are roughly fan-shaped, in other embodiments, if the design shape of the part is not circular but other geometric shapes, the shapes of the clamping blocks 2 at the corresponding positions can be adjusted accordingly. In other words, the shapes of the clamping blocks 2 can be the same or different.

In this embodiment, in order to better clamp the parts, the outer circumference of the clamping block 2 is provided with a clamping groove 23, and the clamping groove 23 is an arc-shaped clamping groove 23 with the center on the axis L, so that when the clamping block 2 moves to the clamping position, the multiple clamping grooves 23 will roughly form a circle, that is, in this embodiment, the clamping pattern is a circle. However, according to the foregoing, when the shape of the part changes, the shape of the clamping groove 23 can be adaptively adjusted.

As shown in FIG2 , in order to prevent the clamping block 2 from deviating from the preset track when moving on the support surface 31, in this embodiment, a guide block 4 is fixedly provided on the support surface 31, and a guide groove 22 corresponding to the guide block 4 is provided on the clamping block 2, and the guide groove 22 extends radially along the axis L. Therefore, when the clamping block 2 moves under the drive of the push block 1, the guide block 4 and the guide groove 22 move relative to each other, and a guide structure is formed between the guide block 4 and the guide groove 22 to limit the moving direction of the clamping block 2, ensuring that the clamping block 2 can only move radially along the axis L without deflection.

In addition, as shown in Figure 2, a limiting portion 41 is provided on the top of the guide block 4, and the limiting portion 41 is located above the clamping block 2. Due to the existence of the limiting portion 41, the clamping block 2 cannot move upward, ensuring that the clamping block 2 is always in the support surface 31 during the movement.

As shown in Figure 2, an elastic element 5 (such as a spring) is also provided in the guide groove 22. One end of the elastic element 5 abuts against the guide block 4, and the other end abuts against the clamping block 2. The elastic element 5 is located on the side of the guide block 4 close to the axis L. In this way, when the clamping block 2 moves radially outward, the elastic element 5 will be compressed, thereby applying an elastic force to the clamping block 2 in the direction of the axis L. Once the push block 1 moves upward, the clamping block 2 will move in the direction of the axis L under the action of the elastic force.

As shown in FIG2 , the push block 1 is provided with a force-applying component 6 capable of applying an axial force to the push block 1. In this embodiment, the force-applying component 6 includes a screw rod 61 and a nut 62 connected to the upper end of the screw rod 61. A thread is provided on the circumferential surface of the screw rod 61. The push block 1 is provided with a through hole 12 that penetrates from top to bottom so that the screw rod 61 can pass through the push block 1 downward. The base 3 is provided with a threaded hole 32 corresponding to the position of the through hole 12. After the screw rod 61 passes through the push block 1, it can extend into the threaded hole 32. At this time, the screw rod 61 rotates in the threaded hole 32 to move the nut 62 downward. The nut 62 abuts against the upper surface of the push block 1 and applies a downward axial force to the push block 1, forcing the push block 1 to move downward.

As shown in FIG2 , the outer periphery of the screw 61 is sleeved with a guide sleeve 7, which is a cylindrical shape with upper and lower openings and a hollow interior, so that the screw 61 can be inserted into the guide sleeve 7, and the guide sleeve 7 is located in the through hole 12. The guide sleeve 7 separates the screw 61 from the push block 1, so that the push block 1 does not contact the screw 61 when it moves up and down. In addition, the nut 62 can abut against the guide sleeve 7, and the nut 62 applies an axial force to the guide sleeve 7, and transmits the axial force to the push block 1 through the guide sleeve 7.

Fig. 4 shows a cross-sectional view taken along line A-A in Fig. 3. As shown in Fig. 4, a coaxially arranged connecting hole 33 is further provided above the threaded hole 32 in the base 3. The connecting hole 33 is located below the through hole 12 and communicates with the through hole 12. The lower end of the guide sleeve 7 is located in the connecting hole 33. When the push block 1 moves up and down, the lower end of the guide sleeve 7 moves up and down in the connecting hole 33. The guide sleeve 7 provides the push block 1 with guidance in the up and down directions.

It should be noted that, in other embodiments, the force-applying component may also be a cylinder or a linear motion mechanism driven by a motor, as long as it can apply an axial force along the axis L to the push rod 1 .

FIG5 is a schematic diagram showing that the push block 1 in this embodiment moves axially downward along the axis L, and the clamping block 2 moves radially outward along the axis L. As shown in FIG5, when the push block 1 moves axially downward along the axis L, the first side surface 11 abuts against the second side surface 21, and the first side surface 11 applies an axially downward force to the second side surface 21. Under the action of the inclined surface, the axially downward force is at least partially converted into a radially outward force, thereby pushing the second side surface 21 to move radially outward (to the left in FIG5) along the axis L, so that the clamping block 2 moves to the clamping position.

FIG6 is a schematic diagram showing that the push block 1 in this embodiment moves axially upward along the axis L, and the clamping block 2 moves radially inward along the axis L. As shown in FIG6 , when the push block 1 moves axially upward along the axis L, the second side surface 21 exerts a force radially inward (rightward in FIG6 ) on the first side surface 11 under the action of the elastic element 5, and under the action of the inclined surface, the radially inward force is at least partially converted into an axially upward force, thereby further pushing the first side surface 11 to move axially upward.

The above is a description of the embodiments of the utility model. Through the above description of the disclosed embodiments, professionals and technicians in the field can implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown in this article, but will comply with the widest range consistent with the principles and novelties disclosed herein.

Claims (9)

1. A clamping device in the form of an inner support for an annular part, the clamping device comprising:

an axis (L);

A pusher block (1) having a first side (11) and being movable axially along said axis (L);

A plurality of clamping blocks (2) having a second side (21) and being movable in a radial direction of the axis (L), a plurality of the clamping blocks (2) being arranged in a circumferential direction around the axis (L);

-said first side (11) is directed towards said second side (21), at least one of said first side (11) and said second side (21) being inclined at an angle to said axis (L) and along the axial direction of said axis (L), said first side (11) at least partially overlapping said second side (21);

With the axial movement of the pushing block (1) along the axis (L), the first side surface (11) can be abutted against the second side surface (21) and convert the axial force from the first side surface (11) into the radial force applied on the second side surface (21) under the action of the inclined surface, so that the clamping blocks (2) move along the radial direction of the axis (L) to move to the clamping positions, and the clamping blocks (2) form a clamping pattern with a preset appearance at the clamping positions.

2. Clamping device according to claim 1, characterized in that the clamping block (2) is further provided with an arc-shaped clamping groove (23) centered on the axis (L), the clamping pattern being a circle centered on the axis (L).

3. Clamping device according to claim 1, characterized in that the first side (11) and the second side (21) are inclined planes forming an angle with the axis (L).

4. A clamping device according to any of claims 1-3, characterized in that the clamping device further comprises:

-a support surface (31), the clamping block (2) being movably arranged on the support surface (31).

5. Clamping device according to claim 4, characterized in that a guide block (4) is fixedly arranged on the supporting surface (31), a guide groove (22) corresponding to the guide block (4) is arranged on the clamping block (2), the guide groove (22) extends along the radial direction of the axis (L), and the guide groove (22) and the guide block (4) move relatively when the clamping block (2) moves along the radial direction of the axis (L).

6. Clamping device according to claim 5, characterized in that between the guide block (4) and the clamping block (2) a resilient element (5) is provided, which resilient element (5) exerts a force on the clamping block (2) towards the axis (L).

7. Clamping device according to claim 4, characterized in that the pushing block (1) is located on one side of the supporting surface (31), and that a force application member (6) for applying an axial force along the axis (L) to the pushing block (1) is connected to the pushing block (1).

8. The clamping device according to claim 7, characterized in that the clamping device further comprises:

The support surface (31) is located on the fixing base, be provided with on the fixing base with screw hole (32) of axis (L) parallel, be provided with on the top pushing block (1) with through-hole (12) that screw hole (32) correspond, force application part (6) include screw rod (61) and connect nut (62) on screw rod (61), screw rod (61) can pass behind through-hole (12) with screw hole (32) threaded connection, the diameter of nut (62) is greater than the diameter of through-hole (12), screw rod (61) are in when rotatory in screw hole (32), nut (62) can be right top pushing block (1) are exerted along the axial effort of axis (L).

9. Clamping device according to claim 8, characterized in that a guide sleeve (7) with an upper opening and a lower opening and hollow inside is arranged in the through hole (12), the screw (61) is arranged in the guide sleeve (7) in a penetrating way, and the pushing block (1) is sleeved outside the guide sleeve (7).