CN219617392U

CN219617392U - High-precision grinding machine

Info

Publication number: CN219617392U
Application number: CN202320761826.4U
Authority: CN
Inventors: 俞滔; 胡善国
Original assignee: Chongqing Xinhongguang Precision Machinery Manufacturing Co ltd
Current assignee: Chongqing Xinhongguang Precision Machinery Manufacturing Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-09-01
Anticipated expiration: 2033-04-07

Abstract

The utility model discloses a high-precision grinding machine, which relates to the field of machine tool fixtures, and the technical scheme of the utility model comprises a base and a bracket; the base is provided with a bracket, and the bracket is downwards provided with a grinding head driven by a main motor; the base is radially provided with a plurality of strip-shaped sliding holes, clamping jaws are slidably matched in the strip-shaped sliding holes, the upper ends of the clamping jaws extend to the upper surface of the base, and the lower ends of the clamping jaws are arranged below the strip-shaped sliding holes; the lower part of the strip-shaped sliding hole is provided with a shifting screw rod which is in running fit with the base, the shifting screw rod is parallel to the direction of the strip-shaped sliding hole, the inner end of the shifting screw rod is fixed with the clamping jaw, the outer end of the base corresponding to the shifting screw rod is provided with a driving cavity, a driving screw sleeve is in running fit in the driving cavity, and the driving screw sleeve is matched with the shifting screw rod. Can realize the effect of one-way auto-lock, positioning accuracy is higher, hardly appears the condition of automatic aversion, and the clamping jaw possesses bigger formation space, can the centre gripping bigger work piece.

Description

High-precision grinding machine

Technical Field

The utility model relates to the field of machine tool fixtures, in particular to a high-precision grinding machine.

Background

The grinding machine is a machine tool for grinding a surface of a workpiece using a grinding tool. Regarding the precision improvement of grinding machine, can starting from two aspects, improve the precision of bistrique on the one hand, on the other hand improves the centre gripping stability of anchor clamps, and the present common clamping jaw adopts the three-jaw structure that expansion mechanism drove, and during this scheme used, the work piece size of centre gripping was lower, because expansion mechanism can not do too big, and no person's precision will show the reduction, and the work piece is too big simultaneously, and the stability of centre gripping also can reduce.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the high-precision grinding machine, which can realize the effect of unidirectional self-locking, has higher positioning precision, is difficult to automatically shift, has larger forming space by clamping jaws and can clamp larger workpieces.

The technical scheme adopted for solving the technical problems is as follows: a high-precision grinding machine comprises a base and a bracket;

the base is provided with the bracket, and the bracket is downwards provided with a grinding head driven by a main motor;

the base is radially provided with a plurality of strip-shaped sliding holes, clamping jaws are slidably matched in the strip-shaped sliding holes, the upper ends of the clamping jaws extend to the upper surface of the base, and the lower ends of the clamping jaws are arranged below the strip-shaped sliding holes;

the lower part of bar slide hole is provided with the shift screw rod, the shift screw rod with the base normal running fit, the shift screw rod is on a parallel with the direction setting of bar slide hole, the inner of shift screw rod with the clamping jaw is fixed, the base corresponds the outer end of shift screw rod is provided with the drive chamber, the drive intracavity internal rotation is cooperateed has the drive swivel nut, the drive swivel nut with shift screw rod adaptation.

The utility model has the beneficial effects that:

in the scheme, the driving screw sleeve is used as a power end, the driving screw rod rotates, and the driving screw sleeve is matched with the shifting screw rod, meanwhile, the shifting screw rod is fixed with the clamping jaw, and the moving screw rod can only slide relative to the base and cannot rotate circumferentially, so that the driving screw rod can be driven to axially change the position when the driving screw sleeve is rotated, and the clamping jaw is controlled to move or be far away from the middle part of the base.

The driving screw is driven to rotate through the driving screw sleeve, so that the driving screw is easier to rotate, but the driving screw sleeve which axially slides drives to rotate is harder, so that the unidirectional self-locking effect is achieved, once the clamped position is determined to be in place, the driving screw sleeve is not rotated any more, the relative locking can be achieved rapidly, the positioning accuracy is higher, the automatic shifting condition is difficult to occur, the clamping jaw has a larger forming space, and a larger workpiece can be clamped.

Preferably, the driving cavity is located at the outer end of the displacement screw, and a through hole for the displacement screw to penetrate is formed in the side wall of the driving cavity.

The position of the driving screw sleeve can be better determined, and the driving screw sleeve is prevented from moving on the base.

Preferably, the lower extreme of clamping jaw is provided with spacing barb, spacing barb back-off in the below both sides of bar slide hole. Because the inner end of the displacement screw rod is less in connection point with the base, the strength is lower, and therefore the upward swing of the clamping jaw can be avoided by arranging the limiting barb, and the stability and the precision of the positioning of the clamping jaw are further improved.

Preferably, the limit barb comprises a pull rod, an axle and rollers, the upper end of the pull rod is in threaded fit with the clamping jaw, the lower end of the pull rod is horizontally provided with the axle, two ends of the axle extend towards the lower edges of two sides of the strip-shaped sliding hole, and two ends of the axle are respectively provided with the rollers which are attached to the lower edges of two sides of the strip-shaped sliding hole. The clamping jaw is contacted with the base through the roller, so that the clamping jaw can move more smoothly, and friction is reduced.

Preferably, the outer wall of the driving screw sleeve is provided with outer gear teeth, a driving screw is in running fit in the base, the driving screw is driven by a driving motor, and the driving screw is meshed with the outer gear teeth. The driving screw is used for driving the driving screw sleeve to rotate, so that a worm and gear structure is formed, the unidirectional transmission characteristic is further enhanced, the driving screw sleeve can only transmit from the screw rod to the driving screw sleeve, but cannot transmit reversely, the workpiece is prevented from reversely pushing the clamping jaw to move, and the stability and the precision of the driving screw sleeve can be remarkably improved.

Preferably, two ends of the driving screw sleeve are respectively provided with a plane thrust bearing matched with the base. The screw sleeve can be driven to rotate smoothly, and friction force between the screw sleeve and the base is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly described, and it is obvious that the drawings in the following description are only two of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating the reverse engagement of the clamping jaw with the limit barb according to an embodiment of the present utility model;

the device comprises a base 1, a strip-shaped sliding hole 2, a clamp 3, a pull rod 4, a wheel shaft 5, a roller 6, a guide rod 7, a movable screw 8, a driving screw sleeve 9, a driving screw 10, a plane thrust bearing 11, a bracket 12 and a grinding head 13.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and examples, which are only for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Examples

As shown in fig. 1, a high-precision grinding machine comprises a base 1 and a bracket 12; the base 1 is provided with the bracket 12, and the bracket 12 is provided with a grinding head 13 driven by a main motor downwards; the base 1 is radially provided with a plurality of strip-shaped slide holes 2, clamping jaws are slidably matched in the strip-shaped slide holes 2, the upper ends of the clamping jaws extend to the upper surface of the base 1, and the lower ends of the clamping jaws are arranged below the strip-shaped slide holes 2; the lower part of the strip-shaped sliding hole 2 is provided with a displacement screw rod, the displacement screw rod is in running fit with the base 1, the displacement screw rod is parallel to the direction of the strip-shaped sliding hole 2, the inner end of the displacement screw rod is fixed with the clamping jaw, the base 1 is provided with a driving cavity corresponding to the outer end of the displacement screw rod, a driving screw sleeve 9 is in running fit with the driving cavity, and the driving screw sleeve 9 is matched with the displacement screw rod.

The utility model has the beneficial effects that:

in the scheme, the driving screw sleeve 9 is used as a power end, the driving screw 10 rotates, and the driving screw sleeve 9 is matched with the shifting screw, meanwhile, the shifting screw is fixed with the clamping jaw, and the moving screw 8 can only slide relative to the base 1 and can not rotate circumferentially, so that the driving screw 10 can be driven to axially change the position when the driving screw sleeve 9 is rotated, and the clamping jaw is controlled to move or be far away from the middle part of the base 1.

The driving screw sleeve 9 drives the driving screw rod 10 to rotate, so that the driving screw sleeve is relatively easier to rotate, but the driving screw rod 10 which axially slides drives the driving screw sleeve 9 to rotate is more difficult, thereby realizing the effect of unidirectional self-locking, once the position of the clamping part 3 is determined to be in place, the driving screw sleeve 9 is not rotated any more, the relative locking can be realized rapidly, the positioning precision is higher, and the situation of automatic displacement is difficult to occur.

The driving cavity is positioned at the outer end of the shifting screw rod, and a through hole for the shifting screw rod to penetrate is formed in the side wall of the driving cavity. The position of the driving screw sleeve 9 can be well determined, and the driving screw sleeve 9 is prevented from moving on the base 1.

The lower extreme of clamping jaw is provided with spacing barb, spacing barb back-off in bar slide hole 2's below both sides. Because the inner end of the displacement screw rod is less in connection point with the base 1 and lower in strength, the limiting barbs are arranged to prevent the clamping jaw from swinging upwards, and the stability and the precision of positioning are further improved.

The limiting barb comprises a pull rod 4, an axle 5 and a roller 6, wherein the upper end of the pull rod 4 is in threaded fit with the clamping jaw, the lower end of the pull rod 4 is horizontally provided with the axle 5, two ends of the axle 5 extend towards the lower edges of two sides of the strip-shaped sliding hole 2, and two ends of the axle 5 are respectively provided with the roller 6 which is abutted against the lower edges of two sides of the strip-shaped sliding hole 2. The clamping jaw is contacted with the base 1 through the roller 6, so that the clamping jaw can move more smoothly, and friction is reduced.

In this embodiment, in order to further increase the strength of the inner end of the displacement screw, a barrel structure is adopted as the screw, the guide rod 7 is slidably matched with the barrel, and the inner end of the guide rod 7 is fixed with the base 1.

The outer wall of the driving screw sleeve 9 is provided with outer gear teeth, a driving screw rod 10 is rotationally matched with the base 1, the driving screw rod 10 is driven by a driving motor, and the driving screw rod 10 is meshed with the outer gear teeth. The driving screw rod 10 drives the driving screw sleeve 9 to rotate to form a worm and gear structure, so that the unidirectional transmission characteristic is further enhanced, the unidirectional transmission can only be realized from the screw rod to the driving screw sleeve 9, but the reverse transmission can not be realized, the workpiece is prevented from reversely pushing the clamping jaw to move, and the stability and the precision of the unidirectional transmission can be remarkably improved.

Two ends of the driving screw sleeve 9 are respectively provided with a plane thrust bearing 11 matched with the base 1. The screw sleeve 9 can be driven to rotate smoothly, and friction force between the screw sleeve and the base 1 is reduced.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The high-precision grinding machine is characterized by comprising a base (1) and a bracket (12);

the base (1) is provided with the bracket (12), and the bracket (12) is provided with a grinding head (13) driven by a main motor downwards;

the base (1) is radially provided with a plurality of strip-shaped sliding holes (2), clamping jaws are slidably matched in the strip-shaped sliding holes (2), the upper ends of the clamping jaws extend to the upper surface of the base (1), and the lower ends of the clamping jaws are arranged below the strip-shaped sliding holes (2);

the lower part of bar slide hole (2) is provided with the shift screw rod, shift screw rod with base (1) normal running fit, shift screw rod is on a parallel with the direction setting of bar slide hole (2), shift screw rod's inner with the clamping jaw is fixed, base (1) corresponds shift screw rod's outer end is provided with the drive chamber, drive intracavity normal running fit has drive swivel nut (9), drive swivel nut (9) with shift screw rod adaptation.

2. A high precision grinding machine according to claim 1, characterized in that: the driving cavity is positioned at the outer end of the shifting screw rod, and a through hole for the shifting screw rod to penetrate is formed in the side wall of the driving cavity.

3. A high precision grinding machine according to claim 1, characterized in that: the lower extreme of clamping jaw is provided with spacing barb, spacing barb back-off in the below both sides of bar slide hole (2).

4. A high precision grinding machine according to claim 3, characterized in that: the limiting barb comprises a pull rod (4), an axle (5) and a roller (6), wherein the upper end of the pull rod (4) is in threaded fit with the clamping jaw, the axle (5) is horizontally arranged at the lower end of the pull rod (4), two ends of the axle (5) extend towards the lower edges of two sides of the strip-shaped sliding hole (2), and two ends of the axle (5) are respectively provided with the roller (6) which is attached to the lower edges of two sides of the strip-shaped sliding hole (2).

5. The high precision grinding machine of claim 4, wherein: the outer wall of the driving screw sleeve (9) is provided with outer gear teeth, a driving screw (10) is rotationally matched with the base (1), the driving screw (10) is driven by a driving motor, and the driving screw (10) is meshed with the outer gear teeth.

6. The high precision grinding machine of claim 5, wherein: two ends of the driving screw sleeve (9) are respectively provided with a plane thrust bearing (11) matched with the base (1).