Fixture convenient for fixing gear

Abstract

The utility model discloses a fixture convenient for fixing a gear. The fixture comprises a fixed table, a first clamp used for bearing a gear is movably arranged on the fixing table. And an expansion part is arranged on the first clamp. According to the clamp convenient for fixing the gear, the pressing block is inserted into the expansion part of the first clamp by moving the pressing block downwards, the through groove is formed in the expansion part and divides the expansion part into a plurality of relatively independent sheets, and the pressing block moves to abut against the inner side of the expansion part, so that the expansion part expands in the direction away from the axis of the pressing block 61; the bottom of the expansion part is thinned through the inner ring groove, so that the expansion part can expand under small force and abut against the inner ring of the gear, the gear is fixed, the good fixing effect is achieved, the expansion part is always inserted and pressed by the pressing block in an abutting mode, the expansion part is prevented from slipping off from the gear, meanwhile, the elastic nylon fold is unfolded, the control effect is achieved in the through groove, and the service life of the gear is prolonged. The situation that the first clamp cannot be recovered due to excessive deformation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a fixture that is convenient for fixing gears. Background Art

[0002] The gear fixture is usually composed of a clamping device and a fixing device, which is used to clamp and fix the gear for processing, assembly or other operations. Different clamping equipment is often selected according to the accuracy of the gear to be processed. Usually combined with the publication number CN211101971 U, the publication date is 2020.07.28, a gear fixture for an efficient gear processing machine tool is disclosed.

[0003] In the prior art including the above patent, a conical mounting seat, a gear, an expansion screw and a fastening cap are provided, and a limited threaded hole is provided on one end face of the conical mounting seat. When the expansion screw is rotated into the gear through the internal thread and the second external thread, the first end of the expansion screw will swell, so that the gear is limited to the gear mounting section area, and then the gear is tightened through the fastening cap and the first external thread. However, when the expansion screw is rotated into the gear, the first end of the mounting section swells, and then the fastening cap is screwed in and fixed. The swollen area does not directly contact the gear, and the swollen area may make it difficult to screw the fastening cap in. Even if it is screwed in normally, the interaction force between the threads may tighten the swollen area, and the fixing effect is weakened. Utility Model Content

[0004] The utility model aims to provide a fixture which is convenient for fixing gears, so as to solve the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture convenient for fixing gears, comprising a fixing platform;

[0006] The fixed platform is movably provided with a first fixture for supporting the gear;

[0007] The first fixture is provided with an expansion portion, and the expansion portion is provided with through grooves distributed in a circumferential array;

[0008] A pressing block is movably arranged on the fixing table, and the pressing block moves to be inserted into the expansion part, and expands the expansion part to fix the gear.

[0009] Wherein: the first clamp has a certain taper, and comprises an inner annular groove opened on the first surface of the inner wall of the first clamp, and elastic nylon pleats are fixedly arranged in the through groove.

[0010] Preferably, a rotating wheel is rotatably provided on the elastic nylon pleats, and in a bent state, the elastic nylon pleats cause the rotating wheel to shrink into the through groove.

[0011] Preferably, a first annular groove is formed on the outer wall of the first fixture, and a sealing ring tightly fitting the first annular groove is fixedly provided on the fixing platform.

[0012] Preferably, a second annular groove is formed on the outer side of the first clamp, and the second annular groove is communicated with the through groove.

[0013] Preferably, a screw for driving the pressing block to move is movably provided on the fixed platform.

[0014] Preferably, the screw rod is equipped with a second clamp having the same specifications as the first clamp but in the opposite direction, and the screw rod is equipped with a fixing cap that drives the second clamp to move.

[0015] Preferably, the first ends of the first clamp and the second clamp are both provided with rubber anti-slip pads.

[0016] Preferably, the pressing block is arranged in a spindle-shaped structure.

[0017] Preferably, a swivel is rotatably provided on the pressing block.

[0018] In the above technical scheme, the utility model provides a fixture for fixing gears, which has the following beneficial effects: the utility model moves the pressure block downward so that the pressure block is inserted into the expansion part of the first fixture. Since the expansion part is provided with a through groove, the through groove divides the expansion part into multiple relatively independent sheets. The pressure block moves to push the inner side of the expansion part, so that the expansion part expands in the direction away from the axis of the pressure block. The inner annular groove thins the bottom of the expansion part, so that the expansion part can expand under a smaller force and resist against the inner ring of the gear to fix the gear, achieving a better fixing effect. The expansion part is always pressed by the pressure block to avoid slipping off the gear. At the same time, the elastic nylon pleats unfold to play a controlling role inside the through groove to avoid excessive deformation of the first fixture that cannot be restored. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the utility model;

[0021] Figure 2 An overall explosion diagram provided for an embodiment of the utility model;

[0022] Figure 3A schematic cross-sectional view of a screw rod, a workbench and a first clamp provided in an embodiment of the utility model;

[0023] Figure 4 A three-dimensional schematic diagram of a first clamp provided in an embodiment of the utility model;

[0024] Figure 5 This is a front schematic diagram of a first clamp provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Fixed table; 2. Sealing ring; 3. First clamp; 31. Through groove; 32. First annular groove; 33. Second annular groove; 34. Elastic nylon pleat; 35. Inner annular groove; 36. Rotating wheel; 4. Second clamp; 5. Fixed cap; 6. Screw; 61. Pressing block; 62. Rotating ring. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-5 As shown, a fixture for fixing a gear includes a fixing platform 1;

[0029] A first fixture 3 for supporting the gear is movably arranged on the fixed platform 1;

[0030] The first clamp 3 is provided with an expansion portion, and the expansion portion is provided with through grooves 31 distributed in a circumferential array;

[0031] A pressing block 61 is movably disposed on the fixing table 1 , and the pressing block 61 moves to be inserted into the expansion part, and expands the expansion part to fix the gear.

[0032] The first fixture 3 has a certain taper, and includes an inner annular groove 35 formed on a first surface of an inner wall of the first fixture 3 . An elastic nylon pleat 34 is fixedly disposed in the through groove 31 .

[0033] Specifically, the gear is placed on the fixed table 1 so that the center of the inner ring of the gear coincides with the axis of the first fixture 3, and the pressure block 61 is moved downward so that the pressure block 61 is inserted into the expansion part of the first fixture 3. Since the expansion part is provided with a through groove 31, the through groove 31 divides the expansion part into a plurality of relatively independent sheets. The pressure block 61 moves to push the inner side of the expansion part so that the expansion part expands in a direction away from the axis of the pressure block 61. The inner annular groove 35 thins the bottom of the expansion part so that the expansion part can expand under a smaller force and resist the inner ring of the gear to fix the gear. At the same time, it drives the elastic nylon pleats 34 to unfold, and plays a controlling role inside the through groove 31 to prevent the first fixture 3 from being deformed too much and unable to recover. When the pressure block 61 is not in contact with the expansion part, the elastic nylon pleats 34 are restored due to the deformation recovery, so that the first fixture 3 is restored by the tension of the elastic nylon pleats 34.

[0034] In the above technology, the pressure block 61 is inserted into the expansion part of the first clamp 3 by moving the pressure block 61 downward. Since the expansion part is provided with a through groove 31, the through groove 31 divides the expansion part into multiple relatively independent sheets. The pressure block 61 moves to push the inner side of the expansion part, so that the expansion part expands in the direction away from the axis of the pressure block 61. The inner annular groove 35 thins the bottom of the expansion part, so that the expansion part can expand under a smaller force and resist against the inner ring of the gear to fix the gear, achieving a better fixing effect. The expansion part is always pressed by the pressure block 61 to avoid slipping off the gear. At the same time, the elastic nylon pleats 34 unfold to play a controlling role inside the through groove 31 to avoid excessive deformation of the first clamp 3 that cannot be restored.

[0035] As an embodiment further provided by the present invention, a rotating wheel 36 is rotatably provided on the elastic nylon pleats 34 , and the elastic nylon pleats 34 cause the rotating wheel 36 to shrink into the through slot 31 in the bent state.

[0036] Specifically, during the expansion process of the expansion portion of the first clamp 3, the elastic nylon pleats 34 gradually unfold from the bent state, so that the wheel 36 originally contracted in the through groove 31 moves inward and abuts against the swivel 62 rotatably arranged on the pressure block 61. The pressure block 61 may rotate during the process of being inserted into the first clamp 3, and the wheel 36 can offset the rotation generated by the pressure block 61 through its own rotation and the rotation of the swivel 62, thereby preventing the pressure block 61 from driving the first clamp 3 to rotate, thereby ensuring the stable fixation of the gear.

[0037] As another embodiment further provided by the present invention, a first annular groove 32 is formed on the outer wall of the first clamp 3 , and a sealing ring 2 tightly fitting with the first annular groove 32 is fixedly arranged on the fixing platform 1 .

[0038] Specifically, when the pressure block 61 of the first clamp 3 is pressed downward, the sealing ring 2 provides an upward supporting force to the second end of the first clamp 3 to prevent the pressure block 61 from directly contacting the fixed platform 1 and causing wear. At the same time, the sealing ring 2 can prevent dust generated during the gear processing from entering the fixed platform 1 along the gap of the first clamp 3.

[0039] As another embodiment further provided by the present invention, a second annular groove 33 is formed on the outer side of the first clamp 3 , and the second annular groove 33 is communicated with the through groove 31 .

[0040] Specifically, the second annular groove 33 is connected to the through groove 31 , so that the structural rigidity of the outer wall of the first clamp 3 is smaller, and it is easier to deform. When the first clamp 3 is subjected to pressure, it will expand outward along the taper of the first clamp 3 itself and bend slightly along the second annular groove 33 and the through groove 31 .

[0041] As another embodiment further provided by the present invention, a second clamp 4 having the same specifications as the first clamp 3 but in the opposite direction is mounted on the screw rod 6 , and a fixing cap 5 driving the second clamp 4 to move is mounted on the screw rod 6 .

[0042] Specifically, the second clamp 4 can be inserted into the expansion part of the first clamp 3 to expand the expansion part. By tightening the fixing cap 5, the fixing cap 5 moves downward along the screw 6, thereby driving the second clamp 4 to be inserted downward into the expansion part of the first clamp 3, so that the expansion part further expands to press against the inner ring of the gear, thereby fixing the gear.

[0043] As another embodiment further provided by the present invention, the pressing block 61 is arranged in a spindle-shaped structure.

[0044] Specifically, after the gear is fixed by the first clamp 3, the second clamp 4 and the fixing cap 5 are assembled on the screw 6 in sequence, and the fixing cap 5 is tightened downward so that the fixing cap 5 drives the second clamp 4 to move downward along the screw 6. At this time, the second clamp 4 is inserted into the gap between the inner ring of the gear and the pressure block 61. During the movement, the second clamp 4 is abutted against the pressure block 61, and the expansion part of the second clamp 4 is expanded by the pressure of the pressure block 61. At this time, the first ends of the second clamp 4 and the first clamp 3 are both abutted against the inner ring of the gear. Since the first ends of the first clamp 3 and the second clamp 4 are both provided with rubber anti-slip pads, the upper and lower parts of the inner ring of the gear can be stressed and will not slide, thereby playing a better fixing role.

[0045] Working principle: Place the gear on the fixed platform 1 so that the center of the inner circle of the gear coincides with the axis of the first clamp 3, rotate the screw 6 so that the screw 6 moves downward along the thread line, thereby driving the pressure block 61 to move downward and insert into the expansion part of the first clamp 3. Since the expansion part is provided with a through groove 31, the through groove 31 divides the expansion part into multiple relatively independent sheets. The pressure block 61 moves to push the inside of the expansion part so that the expansion part expands in the direction away from the axis of the pressure block 61. The inner annular groove 35 thins the bottom of the expansion part, so that the expansion part can also produce under a smaller force. The first clamp 3 is provided with a plurality of holes 34 for supporting the first clamp 3. The second groove 33 is connected with the through groove 31, so that the outer wall of the first clamp 3 has a small structural rigidity and is easier to deform. When the first clamp 3 is subjected to pressure, it expands outward along the taper of the first clamp 3 itself and bends slightly along the second groove 33 and the through groove 31, so that the rotating wheel 36 originally contracted in the through groove 31 moves inward and abuts against the rotating ring 62 rotatably arranged on the pressing block 61. The pressing block 61 may rotate during the insertion into the first clamp 3, and the rotating wheel 36 can rotate the pressing block 61 through the rotating ring 62. The rotation of the first clamp 3 and the rotation of the swivel 62 are offset to prevent the pressure block 61 from driving the first clamp 3 to rotate. At this time, the first end of the first clamp 3 abuts against the inner ring of the gear to fix the gear. Subsequently, the second clamp 4 and the fixing cap 5 are sequentially assembled on the screw 6, and the fixing cap 5 is tightened downward so that the fixing cap 5 drives the second clamp 4 to move downward along the screw 6. At this time, the second clamp 4 is inserted into the gap between the inner ring of the gear and the pressure block 61. During the movement, the second clamp 4 abuts against the pressure block 61, and the expansion part of the second clamp 4 is pressed by the pressure block 61 to expand. At the same time, the first ends of the second clamp 4 and the first clamp 3 are both against the inner ring of the gear. Since the first ends of the first clamp 3 and the second clamp 4 are both provided with rubber anti-slip pads, the upper and lower parts of the inner ring of the gear can be stressed and will not slide, thereby playing a good fixing role. At the same time, it drives the elastic nylon pleats 34 to unfold, and plays a controlling role inside the through groove 31 to prevent the first clamp 3 from being deformed too much and unable to recover. When the pressure block 61 is not in contact with the expansion part, the elastic nylon pleats 34 are deformed and recovered, so that the first clamp 3 is restored by the pulling force of the elastic nylon pleats 34.

[0046] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixture for fixing gears, characterized in that: It includes a fixed platform (1); A first clamp (3) for supporting the gear is movably arranged on the fixed platform (1); The first clamp (3) is provided with an expansion portion, and the expansion portion is provided with through grooves (31) distributed in a circumferential array; A pressing block (61) is movably arranged on the fixing platform (1), and the pressing block (61) moves to be inserted into the expansion part, and expands the expansion part to fix the gear; Wherein: the first clamp (3) has a certain taper, and comprises an inner annular groove (35) opened on the first surface of the inner wall of the first clamp (3), and an elastic nylon pleat (34) is fixedly arranged in the through groove (31).

2. A fixture for fixing gears according to claim 1, characterized in that: A rotating wheel (36) is rotatably arranged on the elastic nylon pleats (34); in a bent state, the elastic nylon pleats (34) cause the rotating wheel (36) to contract in the through slot (31).

3. A fixture for fixing gears according to claim 1, characterized in that: The outer wall of the first clamp (3) is provided with a first annular groove (32), and a sealing ring (2) which is tightly fitted with the first annular groove (32) is fixedly arranged on the fixing platform (1).

4. A fixture for fixing gears according to claim 1, characterized in that: A second annular groove (33) is provided on the outer side of the first clamp (3), and the second annular groove (33) is connected to the through groove (31).

5. The fixture for fixing gears according to claim 1, characterized in that: A screw rod (6) for driving the pressing block (61) to move is movably arranged on the fixed platform (1).

6. A fixture for fixing gears according to claim 5, characterized in that: The screw rod (6) is equipped with a second clamp (4) having the same specifications as the first clamp (3) but in the opposite direction, and the screw rod (6) is equipped with a fixing cap (5) for driving the second clamp (4) to move.

7. A fixture for fixing gears according to claim 6, characterized in that: The first ends of the first clamp (3) and the second clamp (4) are both provided with rubber anti-slip pads.

8. The fixture for fixing gears according to claim 1, characterized in that: The pressing block (61) is arranged in a spindle-shaped structure.

9. A fixture for fixing gears according to claim 8, characterized in that: A rotating ring (62) is rotatably arranged on the pressing block (61).

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