CN217941899U - Floating clamp for finish turning of bevel gear - Google Patents

Abstract

The utility model relates to the technical field of fixtures, in particular to a floating fixture for finish turning bevel gears, which comprises a lathe chuck, wherein a fixed seat is arranged on one side surface of the lathe chuck, one end of the fixed seat, which is far away from the lathe chuck, is detachably connected with a positioning tooth die, and a pulling sleeve is sleeved on the outer side of the fixed seat and can slide towards one side surface which is close to or far away from the lathe chuck; a floating pressing ring is sleeved on the outer side of the positioning tooth die in a sliding manner, a connecting structure is arranged between one end, close to a lathe chuck, of the floating pressing ring and the pull sleeve, the connecting structure is connected with the pull sleeve and the pressing ring, and the pull sleeve and the pressing ring can rotate relatively; a plurality of pressing claws are arranged on one end face, away from the lathe chuck, of the floating pressing ring at intervals, the positioning tooth die is meshed with the bevel gear, and the pressing claws are pressed with the back conical surface of the bevel gear. By adopting the technical scheme, the gap between the two contact surfaces of the pressing claw and the bevel gear can be accurately eliminated, and the pressing damage of the back conical surface of the workpiece can be avoided.

Description

Floating clamp for finish turning of bevel gear

Technical Field

The utility model relates to an anchor clamps technical field especially relates to a finish turning bevel gear's anchor clamps that float.

Background

The bevel gear of the automobile differential is mainly characterized in that one surface is a bevel gear, the other surface is a spherical surface or an end surface, an axial through hole is arranged in the middle, and the net weight of the bevel gear is below 300 g. Generally, a precision forging process is adopted, the tooth shape is directly forged and formed, and the subsequent processing of the tooth shape part is not needed. In the subsequent machining, the tooth-shaped part is used as a positioning reference to machine a hole, a spherical surface and other parts.

The traditional processing technology of the inner hole, the ball (end) surface and the like of the bevel gear of the differential adopts a rigid axial tensioning mechanism. The tooth-shaped part is directly formed by precision forging during precision forging, and the rest parts of the ball (end) surface, the inner hole and the like are forged blank surfaces with allowance, so the machining allowance is irregular and uneven. When the rigid clamp is axially moved and tensioned, the three pressing claws have different positions, cannot be clamped in a balanced manner, are stressed unevenly, and are easy to displace to influence the machining precision of the bevel gear.

In order to avoid uneven clamping stress of a finish forged bevel gear, the prior art provides a spherical finish turning clamp for an automobile bevel gear. And a built-in spherical motion compensation connecting structure is adopted, so that partial clamping errors can be automatically eliminated, and the clamp can uniformly apply pressure as far as possible. However, there are some disadvantages: because the machining allowance left at the back cone of each bevel gear is not uniform enough, and the travel of the pull rod of each lathe of the same model is different, the gap between the two contacts of the pressing claw and the back cone of the bevel gear is also not uniform, and the spherical motion compensation quantity in the clamp system can not completely eliminate the clamping gap. In order to eliminate the clamping reduction in the prior art, the adopted measure is to weld copper on the contact surface of the pressing claw and the bevel gear, however, the mode of eliminating the gap by welding copper has the following defects: 1. copper is welded on the pressing claw in a heating mode, so that the heat is high, and the danger of manual operation is high; 2. acetylene and oxygen are required for heating, and certain potential safety hazards exist in the use and storage of the gases; 3. copper welding needs certain operation skill, and manual polishing is needed due to the fact that the thickness, the size and the shape of the copper are not consistent after manual copper welding; 4. after the press claw is used for a period of time, the abrasion of the copper is fast due to the copper softness, the copper needs to be welded for many times, and the machining efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a floating clamp of finish turning bevel gear can accurately eliminate the clearance between pressure claw and the two contact surfaces of bevel gear, also can avoid the crushing wound to the bevel gear back of the body conical surface.

(II) technical scheme

In order to achieve the above purpose, an embodiment of the present application provides a floating fixture for finish turning of a bevel gear, including a lathe chuck, wherein a fixed seat is arranged on one side surface of the lathe chuck, one end of the fixed seat, which is far away from the lathe chuck, is detachably connected with a positioning tooth die, and a pull sleeve is sleeved on the outer side of the fixed seat and can slide towards one side surface, which is close to or far away from the lathe chuck; a floating pressing ring is sleeved on the outer side of the positioning tooth die in a sliding manner, a connecting structure is arranged between one end, close to the lathe chuck, of the floating pressing ring and the pulling sleeve, the connecting structure is connected with the pulling sleeve and the pressing ring, and the pulling sleeve and the pressing ring can rotate relatively; a plurality of pressing claws are arranged on one end face, away from the lathe chuck, of the floating pressing ring at intervals, the positioning tooth die is meshed with the bevel gear, and the pressing claws are pressed on the outer end face of the bevel gear; a driving cavity is formed in one end, close to the lathe chuck, of the inner side of the fixed seat; at least two third penetrating limiting grooves are formed in the side wall of the fixing seat; a pull disc is arranged on the inner side of the driving cavity, a limiting fixture block is integrally formed on the outer side of the pull disc, penetrates through the third limiting groove and is detachably connected with the pull sleeve; and a driving component for driving the pull disc to move towards one side close to or far away from the lathe chuck is arranged on the inner side of the lathe chuck.

Preferably, the inner diameter of the pull sleeve is larger than the outer diameter of the floating pressing ring, one end of the pull sleeve is sleeved on the outer side of the floating pressing ring, the connecting structure comprises a first annular limiting groove formed in the inner side of the pull sleeve and a second annular limiting groove formed in the outer side of the floating pressing ring, and the first limiting groove and the second limiting groove are spliced to form an arc raceway; balls are distributed in the arc-shaped roller path in a sliding mode, a threaded hole is formed in the pull sleeve and communicated with the first limiting groove, and the balls enter the arc-shaped roller path through the threaded hole; and the threaded hole is in threaded connection with a locking bolt.

Preferably, four sets of third limiting grooves are arranged at equal angles along the circumferential direction, and four limiting clamping blocks are arranged at equal angles and respectively penetrate through one third limiting groove; a mounting ring is integrally formed at one end of the pull sleeve close to the lathe chuck; the mounting ring is provided with a first mounting hole along the axis direction, the limiting fixture block is provided with a second mounting hole, and the first mounting hole and the second mounting hole are internally connected with a mounting screw.

Preferably, a cushion block is arranged between the limiting clamping block and the mounting ring, and the mounting screw penetrates through a connecting hole in the middle of the cushion block.

Preferably, the middle part of the lathe chuck is provided with a through sliding connection hole; the driving assembly comprises a pull rod, one end of the pull rod is located on the outer side of the lathe chuck, the other end of the pull rod penetrates through the sliding connection hole and is abutted to a pull disc on the inner side of the driving cavity, and a locking screw rod is connected between the pull rod and the pull disc.

Preferably, a third mounting hole is formed in one end, far away from the lathe chuck, of the fixing seat, a fourth mounting hole is formed in the middle of the positioning toothed die, the third mounting hole and the fourth mounting hole are concentric, and the locking screw penetrates through the fourth mounting hole and the third mounting hole and then is connected with the pull rod and the pull disc.

Preferably, the fixed seat is connected with the positioning tooth die through a fixed screw rod.

Preferably, a fixed ring plate is integrally formed at one end, close to the lathe chuck, of the fixed seat, the fixed ring plate is detachably connected with the lathe chuck, and the limiting groove penetrates through the fixed ring plate.

(III) advantageous effects

The utility model provides a finish turning bevel gear's anchor clamps that float, mesh bevel gear through fixed location tooth mould, but the outside is fixed it through rectilinear movement's clamping jaw, in fixed process, because the floating clamping ring that draws cover and the outside can rotate relatively, in compressing tightly the in-process, the clamping ring that floats can float at the certain limit, and then the position of three clamping jaw that floats according to the small difference of the bevel gear back of the body conical surface, thereby can accurately eliminate the clearance between clamping jaw and the bevel gear back of the body conical surface two contact surfaces, also can avoid the crushing to the bevel gear back of the body conical surface, replaced the mode of welding copper many times at the clamping jaw contact surface among the prior art simultaneously, the potential safety hazard when having stopped to weld copper, ensure bevel gear's finish turning quality.

Drawings

Fig. 1 is a schematic structural view of a floating fixture for finish turning bevel gears according to the present invention;

fig. 2 is a cross-sectional view of a floating fixture for finish turning bevel gears according to the present invention;

FIG. 3 is an enlarged view of the structure A of FIG. 2;

fig. 4 is an exploded view of the floating fixture for finish turning bevel gears according to the present invention;

fig. 5 is a schematic view of the protruded fixing seat in the floating fixture for finish turning bevel gears according to the present invention;

fig. 6 is a schematic view of a protruding pulling plate in a floating fixture for finish turning bevel gears according to the present invention;

fig. 7 is a schematic diagram of the protruding floating pressing ring in the floating fixture for finish turning of the bevel gear of the present invention.

In the drawings, the reference numbers:

100. a lathe chuck; 110. sliding connection holes; 200. a fixed seat; 210. a drive chamber; 220. a third limiting groove; 230. a third mounting hole; 240. fixing the screw rod; 250. a stationary ring plate; 300. positioning a tooth die; 310. a fourth mounting hole; 400. pulling the sleeve; 410. a threaded hole; 420. a mounting ring; 421. a first mounting hole; 422. installing a screw rod; 423. cushion blocks; 500. a floating pressing ring; 510. pressing claws; 600. a connecting structure; 610. a first limit groove; 620. a second limit groove; 630. an arc raceway; 640. a ball bearing; 650. a locking bolt; 700. pulling the disc; 710. a limiting clamping block; 711. a second mounting hole; 800. a drive assembly; 810. a pull rod; 820. locking the screw rod; 900. a bevel gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

The utility model provides a floating fixture of finish turning bevel gear, refer to fig. 1-5, including lathe chuck 100, a side of lathe chuck 100 is provided with fixing base 200, and fixing base 200 keeps away from the one end of lathe chuck 100 and can dismantle and be connected with location tooth mould 300, and the outside of fixing base 200 has cup jointed and has drawn cover 400, draws cover 400 can slide to a side of being close to or keeping away from lathe chuck 100. The floating clamping ring 500 is sleeved on the outer side of the positioning tooth die 300 in a sliding mode, a connecting structure 600 is arranged between one end, close to the lathe chuck 100, of the floating clamping ring 500 and the pull sleeve 400, and the floating clamping ring 500 can be driven to move when the pull sleeve 400 moves through the arranged connecting structure 600. A plurality of pressing claws 510 are arranged on one end face of the floating pressing ring 500 away from the lathe chuck 100 at intervals, the positioning tooth die 300 is meshed with the bevel gear 900, and the pressing claws 510 are pressed on the outer end face of the bevel gear 900. When the floating pressing ring 500 moves linearly, the plurality of pressing claws 510 can be controlled to move linearly at the same time, and the bevel gear 900 is pressed by matching with the positioning tooth die 300. In the manufacturing process, the shape and position precision of the contact surface of the pressing claw 510 is ensured, and further the gap between the pressing claw 510 and the back cone contact surface of the bevel gear 900 can be accurately eliminated. It should be noted that when the material loading is required, the bevel gear 900 is placed between the pressing claw 510 and the positioning tooth die 300 through the gap between the pressing claws 510. In the present embodiment, the bevel gear 900 is a workpiece to be machined.

A driving cavity 210 is formed at one end of the inner side of the fixed seat 200, which is close to the lathe chuck 100; at least two third limiting grooves 220 are formed on the side wall of the fixing seat 200; a pull disc 700 is arranged on the inner side of the driving cavity 210, a limiting block 710 is integrally formed on the outer side of the pull disc 700, and the limiting block 710 passes through the third limiting groove 220 and is detachably connected with the pull sleeve 400; the inner side of the lathe chuck 100 is provided with a driving assembly 800 for driving the pull disc 700 to move towards or away from the lathe chuck 100. During operation, the driving assembly 800 can drive the pull disc 700 to move linearly, and during the linear movement of the pull disc 700, the driving effect of the pull sleeve 400 and the floating pressing ring 500 controls the pressing claw 510 to move linearly close to or away from the positioning tooth mold 300, so as to fix or blank the bevel gear 900.

Wherein, the inner diameter of the pull sleeve 400 is larger than the outer diameter of the floating clamping ring 500, when being installed, one end of the pull sleeve 400 is sleeved outside the floating clamping ring 500, and the connecting structure 600 is positioned between the pull sleeve 400 and the floating clamping ring 500. The connecting structure 600 connects the pull sleeve 400 and the pressing ring 500, and the pull sleeve 400 and the pressing ring 500 can rotate relatively.

Specifically, the connecting structure 600 includes a first annular limiting groove 610 opened on the inner side of the pull sleeve 400 and a second annular limiting groove 620 opened on the outer side of the floating pressing ring 500, after the pull sleeve 400 and the floating pressing ring 500 are sleeved, the positions of the first limiting groove 610 and the second limiting groove 620 are overlapped, and the two are spliced to form the arc-shaped raceway 630; balls 640 are slidably distributed in the arc-shaped rolling way 630, a threaded hole 410 is formed in the pull sleeve 400, the threaded hole 410 is communicated with the first limiting groove 610, and the balls 640 enter the arc-shaped rolling way 630 through the threaded hole 410; the threaded hole 410 is threadedly coupled with a locking bolt 650. It should be noted that the diameter of the ball 640 is slightly smaller than that of the arc-shaped raceway 630, and the ball 640 can slide inside the arc-shaped raceway 630.

In one embodiment, four sets of third limiting grooves 220 are disposed at equal angles along the circumferential direction, and four limiting blocks 710 are disposed at equal angles and respectively pass through one third limiting groove 220. Through the four sets of third limiting grooves 220 and limiting fixture blocks 710, the floating pressing ring 500 is stressed more uniformly in the moving process, and the pressing force is more uniform when the bevel gear 900 is pressed.

A mounting ring 420 is integrally formed at one end of the pull sleeve 400 close to the lathe chuck 100; the mounting ring 420 is provided with a first mounting hole 421 along the axial direction, the limiting fixture block 710 is provided with a second mounting hole 711, and the first mounting hole 421 and the second mounting hole 711 are connected with a mounting screw 422. The pull sleeve 400 and the limiting fixture block 710 are fixedly connected through the arranged mounting screw 422.

A cushion block 423 is arranged between the limiting fixture block 710 and the mounting ring 420, and the mounting screw 422 passes through a connecting hole in the middle of the cushion block 423. Through the cushion 423 that sets up, can control the clearance between spacing fixture block 710 and the collar 420 when fixed, and then can realize carrying out the centre gripping to the bevel gear 900 of different thickness through the cushion 423 of changing different thickness.

The middle part of the lathe chuck 100 is provided with a through sliding connection hole 110; the driving assembly 800 includes a pull rod 810, one end of the pull rod 810 is located outside the lathe chuck 100, the other end of the pull rod 810 passes through the sliding hole 110 and abuts against the pull disc 700 inside the driving cavity 210, and a locking screw 820 is connected between the pull rod 810 and the pull disc 700. The pull rod 810 is controlled to move linearly by a linear moving mechanism such as an air cylinder/oil cylinder on the outer side.

The end of the fixed seat 200 far from the lathe chuck 100 is provided with a third mounting hole 230, the middle part of the positioning toothed die 300 is provided with a fourth mounting hole 310, the third mounting hole 230 and the fourth mounting hole 310 are concentric, and a locking screw 820 passes through the fourth mounting hole 310 and the third mounting hole 230 and then is connected with the pull rod 810 and the pull disc 700.

Further, the fixed seat 200 and the positioning tooth mold 300 are connected by a fixing screw 240. A fixed ring plate 250 is integrally formed at one end of the fixing base 200 close to the lathe chuck 100, the fixed ring plate 250 is detachably connected with the lathe chuck 100, and the third limiting groove 220 penetrates through the fixed ring plate 250. The lathe chuck 100 and the fixed seat 200 can be fixedly connected through the arranged fixed ring plate 250. The specific connection mode may be through a bolt connection, or other connection modes, which is not limited herein.

The utility model provides a finish turning bevel gear's anchor clamps that float, mesh bevel gear through fixed location tooth mould, but the outside is fixed it through rectilinear movement's clamping jaw, in fixed process, because the floating clamping ring that draws cover and the outside can rotate relatively, in compressing tightly the in-process, the clamping ring that floats can float at the certain limit, and then the position of three clamping jaw that floats according to the small difference of the bevel gear back of the body conical surface, thereby can accurately eliminate the clearance between clamping jaw and bevel gear two contact surfaces, also can avoid the crushing of work piece back of the body conical surface, replaced the mode that welds copper many times at the clamping jaw contact surface among the prior art simultaneously, the potential safety hazard when having stopped to weld copper, ensure bevel gear's finish turning quality simultaneously.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the case of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. The floating fixture for finish turning of the bevel gear is characterized by comprising a lathe chuck (100), wherein a fixed seat (200) is arranged on one side surface of the lathe chuck (100), one end, far away from the lathe chuck (100), of the fixed seat (200) is detachably connected with a positioning tooth die (300),

a pull sleeve (400) is sleeved on the outer side of the fixed seat (200), and the pull sleeve (400) can slide towards one side close to or far away from the lathe chuck (100);

a floating pressing ring (500) is sleeved on the outer side of the positioning tooth die (300) in a sliding mode, a connecting structure (600) is arranged between one end, close to the lathe chuck (100), of the floating pressing ring (500) and the pull sleeve (400), the connecting structure (600) is connected with the pull sleeve (400) and the pressing ring (500), and the pull sleeve (400) and the pressing ring (500) can rotate relatively;

a plurality of pressing claws (510) are arranged on one end face, away from the lathe chuck (100), of the floating pressing ring (500) at intervals, the positioning tooth die (300) is meshed with the bevel gear (900), and the pressing claws (510) are pressed on the back conical surface of the bevel gear (900);

a driving cavity (210) is formed in one end, close to the lathe chuck (100), of the inner side of the fixed seat (200); at least two third penetrating limiting grooves (220) are formed in the side wall of the fixed seat (200);

a pull disc (700) is arranged on the inner side of the driving cavity (210), a limiting fixture block (710) is integrally formed on the outer side of the pull disc (700), and the limiting fixture block (710) penetrates through the third limiting groove (220) and is detachably connected with the pull sleeve (400);

the inner side of the lathe chuck (100) is provided with a driving component (800) which drives the pull disc (700) to move towards one side close to or far away from the lathe chuck (100).

2. The floating fixture for the finish turning bevel gear according to claim 1, wherein the inner diameter of the pull sleeve (400) is larger than the outer diameter of the floating pressing ring (500), one end of the pull sleeve (400) is sleeved outside the floating pressing ring (500), the connecting structure (600) comprises a first annular limiting groove (610) arranged inside the pull sleeve (400) and a second annular limiting groove (620) arranged outside the floating pressing ring (500), and the first limiting groove (610) and the second limiting groove (620) are spliced to form an arc raceway (630);

balls (640) are distributed in the arc-shaped roller path (630) in a sliding mode, a threaded hole (410) is formed in the pull sleeve (400), the threaded hole (410) is communicated with the first limiting groove (610), and the balls (640) enter the arc-shaped roller path (630) through the threaded hole (410); the threaded hole (410) is in threaded connection with a locking bolt (650).

3. The floating fixture for the finish turning bevel gears according to claim 1, wherein four sets of the third limiting grooves (220) are arranged at equal angles along the circumferential direction, four sets of the limiting fixture blocks (710) are arranged at equal angles and respectively pass through one third limiting groove (220);

a mounting ring (420) is integrally formed at one end of the pull sleeve (400) close to the lathe chuck (100);

the mounting ring (420) is provided with a first mounting hole (421) along the axis direction, the limiting fixture block (710) is provided with a second mounting hole (711), and the first mounting hole (421) and the second mounting hole (711) are connected with a mounting screw (422) in.

4. The floating fixture for finely turning the bevel gears according to claim 3, wherein a cushion block (423) is arranged between the limiting fixture block (710) and the mounting ring (420), and the mounting screw (422) passes through a connecting hole in the middle of the cushion block (423).

5. The floating fixture for finish turning of bevel gears according to claim 1, wherein a sliding connection hole (110) is formed in the middle of the lathe chuck (100) and penetrates through the lathe chuck;

the driving assembly (800) comprises a pull rod (810), one end of the pull rod (810) is located on the outer side of the lathe chuck (100), the other end of the pull rod (810) penetrates through the sliding hole (110) and abuts against a pull disc (700) on the inner side of the driving cavity (210), and a locking screw (820) is connected between the pull rod (810) and the pull disc (700).

6. The floating fixture for the finish turning bevel gear according to claim 5 is characterized in that one end of the fixed seat (200) far away from the lathe chuck (100) is provided with a third mounting hole (230), the middle part of the positioning tooth die (300) is provided with a fourth mounting hole (310), the third mounting hole (230) and the fourth mounting hole (310) are concentric, and the locking screw (820) penetrates through the fourth mounting hole (310) and the third mounting hole (230) and then is connected with the pull rod (810) and the pull disc (700).

7. The floating fixture for finely turning the bevel gear according to claim 1, wherein the fixed seat (200) and the positioning tooth die (300) are connected by a fixing screw (240).

8. The floating fixture for finely turning bevel gears according to claim 1, wherein a fixed ring plate (250) is integrally formed at one end of the fixed seat (200) close to the lathe chuck (100), the fixed ring plate (250) is detachably connected with the lathe chuck (100), and the third limiting groove (220) penetrates through the fixed ring plate (250).

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