CN218168949U

CN218168949U - Gear hobbing clamp

Info

Publication number: CN218168949U
Application number: CN202221751331.5U
Authority: CN
Inventors: 张红军; 张翼
Original assignee: Akita Gear Co ltd
Current assignee: Akita Gear Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-12-30
Anticipated expiration: 2032-07-08

Abstract

A gear hobbing fixture comprises a guide seat, wherein a stepped hole is formed in the guide seat, a workpiece positioning disc is arranged at the upper end of the guide seat, a central hole of the workpiece positioning disc is communicated with a small-diameter hole of the guide seat, a pull rod is in sliding fit with a large-diameter hole of the guide seat, a shaft hole is formed in the upper end of the pull rod, a plurality of guide holes are formed in the circumference of the pull rod and communicated with the shaft hole, a sliding block is in sliding fit in each guide hole, guiding inner conical surfaces are arranged on one end, close to the circle center, of each sliding block, guiding outer conical surfaces are arranged below one end, far away from the circle center, of each sliding block, an annular abdicating groove is formed in the inner wall of the large-diameter hole of each stepped hole, the lower groove wall of each annular abdicating groove is a guiding conical surface, a hobbing mandrel is a stepped shaft with a gradually decreased diameter, the lowest end of the stepped shaft is a first shaft section, an annular groove is formed in the first shaft section, the lower groove wall of the annular groove is a guiding inclined surface, the lower end of the hobbing mandrel is provided with a guiding conical surface, and the diameter of the second shaft section is the same as that of the workpiece inner hole; the gear hobbing mandrel is fixedly connected with a pressing sleeve and used for pressing a workpiece.

Description

Gear hobbing clamp

Technical Field

The utility model relates to the field of machine-building, in particular to gear hobbing anchor clamps.

Background

The gear transmission is a main transmission form of mechanical transmission, and the accuracy and the smoothness of the mechanical transmission are determined by the accuracy of the gear. When the gear is subjected to gear hobbing, a tooth part to be machined and a clamp need to achieve a certain coaxiality relationship. At present, a method for clamping a workpiece to be machined is to sleeve the workpiece on a hobbing mandrel, then install a nut on the hobbing mandrel, manually screw the nut to compress the workpiece, and the force for manually screwing the nut is difficult to control, so that the coaxiality cannot be ensured, and the steps of installing and disassembling the workpiece are complicated, the nut needs to be repeatedly disassembled and assembled, the time and the labor are consumed, and the working efficiency is low; on the other hand, because the inner hole of the workpiece is in transition fit with the mandrel, after the workpiece is machined, the workpiece is usually difficult to take down manually.

Disclosure of Invention

The utility model discloses a solve the problem that above prior art exists, provide a gear hobbing anchor clamps, can quick clamping work piece to the axiality that makes work piece and anchor clamps obtains guaranteeing, the technical scheme of the utility model as follows:

the utility model provides a gear hobbing clamp, includes the installation base, be equipped with a through-hole on the installation base, installation base upper end fixedly connected with guide holder, be equipped with a shoulder hole on the guide holder, the big footpath hole of this shoulder hole and the through-hole intercommunication of installation base, a work piece positioning disk is installed to the guide holder upper end, and the work piece positioning disk can be changed according to the work piece of different specifications, has improved the commonality of this device. The center hole of the workpiece positioning disc is communicated with the small-diameter hole of the guide seat, a pull rod penetrates through a through hole of the mounting base to be in sliding fit with the large-diameter hole of the guide seat, a shaft hole for inserting the hobbing mandrel is formed in the upper end of the pull rod, a plurality of guide holes extending in the radial direction are formed in the circumference of the pull rod and communicated with the shaft hole, the guide holes are located on the same plane and are uniformly distributed along the circumference, a slide block is in sliding fit in each guide hole, the length of the slide block is larger than that of the guide hole, an inner guide conical surface is arranged on the upper portion and the lower portion of one end, close to the circle center, of the slide block, the lower portion of one end, far away from the circle center, of the slide block is provided with an outer guide conical surface, an annular abdicating groove corresponding to the slide block is formed in the inner wall of the large-diameter hole of the stepped hole of the guide seat, the lower groove wall of the annular abdicating groove is a guide conical surface corresponding to the outer guide conical surface of the slide block; the hobbing mandrel is fixedly connected to the lower end of the connector through a mounting flange and extends downwards to form a stepped shaft with a gradually reduced diameter, the lowest end of the stepped shaft is a first shaft section, an annular groove is formed in the first shaft section, the width of the annular groove is more than twice the thickness of a sliding block, the lower groove wall of the annular groove is a guide inclined plane, the sum of the radius of the annular groove and the length of the sliding block is equal to the radius of a large-diameter hole of a guide seat, a guide conical surface is arranged at the end part of the lower end of the hobbing mandrel, a second shaft section is arranged above the first shaft section, and the diameter of the second shaft section is the same as the diameter of an inner hole of a workpiece; the lower end of the mounting flange of the hobbing mandrel is fixedly connected with a pressing sleeve for pressing a workpiece.

The gear hobbing machine is characterized in that a push sleeve is sleeved between the pressing sleeve and the gear hobbing mandrel, the inner wall of the push sleeve is in sliding fit with the gear hobbing mandrel, the outer circle of the push sleeve is in sliding fit with the inner wall of the pressing sleeve, an annular cavity is formed between the upper end face of the push sleeve and the gear hobbing mandrel as well as between the upper end face of the push sleeve and the pressing sleeve, the connector and the gear hobbing mandrel are provided with communicated air passages, and the air passages of the gear hobbing mandrel are communicated with the annular cavity.

The upper end of the push sleeve is provided with a flange, and the periphery of the flange is in sliding fit with the inner wall of the pressing sleeve.

The guide hole of the pull rod is a square hole, and correspondingly, the section of the sliding block is rectangular.

The drill way of the guide hole is provided with a limiting groove, the sliding block is inserted with a pin, and the pin extends into the limiting groove and is limited by the limiting groove.

The pull rod is provided with an exhaust hole.

The end face of the sliding block close to the circle center is a concave cambered surface, the radius of the concave cambered surface is the same as that of an annular groove of the gear hobbing mandrel, the end face far away from the circle center is a convex cambered surface, and the radius of the convex cambered surface is the same as that of a large-diameter hole of the guide seat.

Adopt above-mentioned technical scheme: the installation base is provided with a through hole, the upper end of the installation base is fixedly connected with a guide seat, the guide seat is provided with a stepped hole, the large-diameter hole of the stepped hole is communicated with the through hole of the installation base, the upper end of the guide seat is provided with a workpiece positioning disc, the central hole of the workpiece positioning disc is communicated with the small-diameter hole of the guide seat, a pull rod penetrates through the through hole of the installation base and is in sliding fit with the large-diameter hole of the guide seat, the upper end of the pull rod is provided with a shaft hole for inserting a hobbing mandrel, the circumference of the pull rod is provided with a plurality of guide holes extending radially and communicated with the shaft hole, the plurality of guide holes are positioned on the same plane and are uniformly distributed along the circumference, each guide hole is provided with a slide block in a sliding fit manner, the length of the slide block is greater than that of the guide hole, the upper end and the lower end, close to the center of the circle, of the slide block are both provided with guide inner conical surfaces, the lower end, far away from the center of the slide block, of the large-diameter hole of the guide seat is provided with an annular abdicating groove corresponding to the slide block; the hobbing core shaft is fixedly connected to the lower end of the connector through a mounting flange and extends downwards to form a stepped shaft with a gradually reduced diameter, the lowest end of the stepped shaft is a first shaft section, an annular groove is formed in the first shaft section, the width of the annular groove is more than twice the thickness of a sliding block, the lower groove wall of the annular groove is a guide inclined plane, the sum of the radius of the annular groove and the length of the sliding block is equal to the radius of a large-diameter hole of a guide seat, a guide conical surface is arranged at the lower end part of the hobbing core shaft, a second shaft section is arranged above the first shaft section, and the diameter of the second shaft section is the same as the diameter of an inner hole of a workpiece; the lower end of the mounting flange of the hobbing mandrel is fixedly connected with a pressing sleeve for pressing a workpiece.

The cover has one to push away the cover between pressure cover and the gear hobbing dabber, the inner wall and the gear hobbing dabber sliding fit that push away the cover push away the excircle of cover and press cover inner wall sliding fit, push away and form an annular cavity between up end and gear hobbing dabber, the pressure cover, the connector is equipped with the air flue of intercommunication with the gear hobbing dabber, and the air flue of gear hobbing dabber accesss to annular cavity, and the connector is connected with the lathe, and the lathe will be sent gas to the lathe, and the lathe will be sent gas into the connector, and gas gets into the gear hobbing dabber from the connector again, and the air flue of rethread gear hobbing dabber accesss to annular cavity to can promote downwards and push away the cover, reach the purpose of releasing the work piece after gear hobbing processing is accomplished.

The upper end of the push sleeve is provided with a flange, the periphery of the flange is in sliding fit with the inner wall of the pressing sleeve, and the flange is arranged to reduce sliding friction between the push sleeve and the pressing sleeve.

The drill way of the guide hole is provided with a limiting groove, the sliding block is inserted with a pin, the pin extends into the limiting groove and is limited by the limiting groove, and the phenomenon that the length of the sliding block entering the shaft hole of the pull rod is too long to cause the rolling tooth mandrel to be pushed against the sliding block and be clamped is avoided.

The end face of the sliding block close to the circle center is a concave arc face, the radius of the concave arc face is the same as that of the annular groove of the hobbing mandrel, so that the sliding block can clamp the hobbing mandrel more firmly, the end face far away from the circle center is a convex arc face, and the radius of the convex arc face is the same as that of the large-diameter hole of the guide seat.

Through the removal of gear hobbing dabber, pull rod, the radial movement that drives the slider realizes the tight and relaxation of quick clamp to the gear hobbing dabber, the axial position of work piece is restricted through the work piece positioning disk simultaneously, reach the reliable and radial zero clearance location of axial positioning, the accessible pushes away the cover and moves back the work piece from the gear hobbing dabber after gear hobbing processing is accomplished, this kind of gear hobbing anchor clamps, the axiality of work piece and anchor clamps is good, loading and unloading are convenient quick, the location is accurate, it is rapid to get, gear hobbing positioning accuracy and production efficiency have been improved.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

FIG. 1 is a schematic structural view of a gear hobbing fixture clamping a workpiece;

FIG. 2 is a schematic structural view of a hobbing mandrel;

FIG. 3 is a schematic view of the guide seat;

fig. 4 is a schematic structural view of the tie rod.

Detailed Description

The utility model discloses an embodiment of gear hobbing anchor clamps:

referring to fig. 1 to 4, a gear hobbing fixture comprises a mounting base 4, wherein a through hole is formed in the mounting base 4, a guide seat 9 is fixedly connected to the upper end of the mounting base 4, a stepped hole is formed in the guide seat 9, a large-diameter hole of the stepped hole is communicated with the through hole of the mounting base 4, a workpiece positioning disc 10 is mounted at the upper end of the guide seat 9, a central hole of the workpiece positioning disc 10 is communicated with a small-diameter hole of the guide seat 9, a pull rod 5 penetrates through the through hole of the mounting base 4 to be in sliding fit with the large-diameter hole of the guide seat 9, the lower end of the pull rod 5 is connected with an oil cylinder, an axle hole 51 for inserting the hobbing spindle 14 is formed in the upper end of the pull rod 5, a plurality of radially extending guide holes 52 are formed in the circumference of the pull rod 5 and communicated with the axle hole 51, the plurality of guide holes 52 are located on the same plane and are uniformly distributed along the circumference, a slide block 7 is slidably matched in each guide hole 52, a limiting groove 53 is formed in the orifice of the guide hole 52, a pin 8 is inserted into the block 7, and the pin 8 extends into the limiting groove 53, so that the length of the slide block 7 is prevented from being blocked by the slide block 7 from pushing up the slide rod 14. The length of the slide block 7 is greater than that of the guide hole 52, the upper and lower parts of one end, close to the circle center, of the slide block 7 are respectively provided with a guide inner conical surface, the lower part of one end, far away from the circle center, of the slide block 7 is a guide outer conical surface, the inner wall of the large-diameter hole of the stepped hole of the guide seat 9 is provided with an annular abdicating groove corresponding to the slide block 7, the lower groove wall 91 of the annular abdicating groove is a guide conical surface, and the guide conical surface corresponds to the guide outer conical surface of the slide block 7; the hobbing mandrel is characterized by further comprising a connector 16 used for being connected with a machine tool, the hobbing mandrel 14 is fixedly connected to the lower end of the connector 16 through a mounting flange 15 and extends downwards to form a stepped shaft with a decreasing diameter, the lowest end of the stepped shaft is a first shaft section 3, the first shaft section 3 is provided with an annular groove, the width of the annular groove is more than twice the thickness of a sliding block 7, the sliding block is provided with freedom of moving up and down, the lower groove wall 19 of the annular groove is a guide inclined surface, the sum of the radius of the annular groove and the length of one sliding block 7 is equal to the radius of a large-diameter hole of a guide seat 9, the lower end part of the hobbing mandrel 14 is provided with a guide conical surface, a second shaft section 2 is arranged above the first shaft section 3, and the diameter of the second shaft section 2 is the same as that of an inner hole of a workpiece 1; the lower end of a mounting flange 15 of the hobbing mandrel 14 is fixedly connected with a pressing sleeve 13 for pressing a workpiece. The gear hobbing machine is characterized in that a push sleeve 12 is sleeved between the pressing sleeve 13 and the gear hobbing mandrel 14, the inner wall of the push sleeve 12 is in sliding fit with a third shaft section 11 of the gear hobbing mandrel 14, the diameter of the third shaft section 11 is larger than that of the second shaft section 2 and is positioned above the second shaft section 2, the excircle of the push sleeve 12 is in sliding fit with the inner wall of the press sleeve 13, an annular cavity 6 is formed between the upper end face of the push sleeve 12 and the gear hobbing mandrel 14 and between the upper end face of the push sleeve 12 and the pressing sleeve 13, a communicated air passage 17 is formed between the connector 16 and the gear hobbing mandrel 14, the air passage 17 of the gear hobbing mandrel 14 is communicated with the annular cavity 6, the connector 16 is connected with the machine tool, air is sent to the machine tool by the air compressor, the machine tool sends air into the connector 16, the air enters the gear hobbing mandrel 14 from the connector 16 and then is communicated with the annular cavity 6 through the air passage of the gear hobbing mandrel 14, so that the push sleeve 12 can be pushed downwards, and the purpose of pushing out a workpiece is achieved after gear hobbing is finished. The upper end of the push sleeve 12 is provided with a flange, the periphery of the flange is in sliding fit with the inner wall of the pressure sleeve 13, and the flange is arranged to reduce the sliding friction force between the push sleeve 12 and the pressure sleeve 13. The guide hole 52 of the pull rod 5 is a square hole, and correspondingly, the section of the slide block 7 is rectangular. The pull rod 5 is provided with an exhaust hole 54. The end face, close to the circle center, of the sliding block 7 is a concave arc face, the radius of the concave arc face is the same as that of an annular groove of the hobbing mandrel 14, the sliding block 7 can clamp the hobbing mandrel 14 more firmly, the end face, far away from the circle center, of the sliding block is a convex arc face, and the radius of the convex arc face is the same as that of a large-diameter hole of the guide seat 9.

Through the removal of gear hobbing dabber, pull rod 5, the radial movement that drives slider 7 realizes the quick clamping and relaxing to the gear hobbing dabber, the axial position of work piece is restricted through work piece positioning disk 10 simultaneously, reach the reliable and radial zero clearance location of axial positioning, accessible push away cover 12 and withdraw the work piece from the gear hobbing dabber after gear hobbing processing is accomplished, this kind of gear hobbing anchor clamps, the axiality of work piece and anchor clamps is good, loading and unloading are convenient quick, the location is accurate, it is rapid to get, gear hobbing positioning accuracy and production efficiency have been improved.

When a workpiece is clamped, the connecting head 16 moves downwards under the driving of a machine tool to drive the hobbing mandrel 14 to move downwards, so that the hobbing mandrel 14 penetrates through the workpiece 1 downwards to be inserted into the guide seat 9, is guided by the small-diameter hole of the guide seat 9 to be inserted into the large-diameter hole of the guide seat 9, is inserted into the pull rod 5 and pushes open the slide block 7 through the guide conical surface at the lower end part of the hobbing mandrel 14, so that the slide block 7 moves back to the annular abdicating groove of the guide seat 9, the hobbing mandrel 14 stops moving after the workpiece 1 is pressed by the pressing sleeve 13, then the pull rod 5 moves downwards under the driving of the oil cylinder, at the moment, the slide block 7 moves towards the center of a circle under the guiding of the lower groove wall of the annular abdicating groove, and meanwhile, the pull rod 5 moves downwards, one final end of the slide block 7 tightly presses against the hobbing mandrel 14, and the other end of the large-diameter hole wall of the guide seat 9, so that the hobbing mandrel 14 is clamped; when the workpiece is to be loosened, the pull rod 5 firstly moves upwards until the guide hole 52 of the pull rod 5 moves to a position which is as high as the annular abdicating groove of the guide seat 9, the pull rod 5 stops moving, at the moment, the slide block 7 is in a free state, then the hobbing core shaft 14 moves upwards, the lower groove wall of the annular groove of the hobbing core shaft 14 props open the slide block 7, the slide block 7 moves into the annular abdicating groove of the guide seat 9, the hobbing core shaft 14 can move upwards out of the pull rod 5, and meanwhile, the push sleeve 12 retreats the workpiece 1 from the hobbing core shaft 14 under the action of gas.

Claims

1. The utility model provides a gear hobbing anchor clamps, includes installation base (4), its characterized in that: the installation base (4) is provided with a through hole, the upper end of the installation base (4) is fixedly connected with a guide seat (9), the guide seat (9) is provided with a stepped hole, the large-diameter hole of the stepped hole is communicated with the through hole of the installation base (4), the upper end of the guide seat (9) is provided with a workpiece positioning disc (10), the central hole of the workpiece positioning disc (10) is communicated with the small-diameter hole of the guide seat (9), a pull rod (5) penetrates through the through hole of the installation base (4) to be in sliding fit with the large-diameter hole of the guide seat (9), the upper end of the pull rod (5) is provided with a shaft hole (51) for inserting a hobbing core shaft (14), the circumference of the pull rod (5) is provided with a plurality of guide holes (52) extending in the radial direction to be communicated with the shaft hole (51), the guide holes (52) are located on the same plane and are uniformly distributed along the circumference, a sliding block (7) is matched in each guide hole (52) in a sliding mode, the length of the sliding block (7) is larger than that of the guide holes (52), guide inner conical surfaces are arranged at the upper part and the lower part of one end, close to the circle center, of the sliding block (7), a guide outer conical surface is arranged below one end, far away from the circle center, of the sliding block (7), an annular abdicating groove corresponding to the sliding block (7) is arranged on the inner wall of a large-diameter hole of a stepped hole of the guide seat (9), the lower groove wall of the annular abdicating groove is a guide conical surface, and the guide conical surface corresponds to the guide outer conical surface of the sliding block (7); the hobbing core shaft is characterized by further comprising a connector (16) used for being connected with a machine tool, the hobbing core shaft (14) is fixedly connected to the lower end of the connector (16) through a mounting flange (15) and extends downwards to form a stepped shaft with a gradually reduced diameter, the lowest end of the stepped shaft is a first shaft section (3), an annular groove is formed in the first shaft section (3), the width of the annular groove is larger than twice the thickness of a sliding block (7), the lower groove wall of the annular groove is a guide inclined plane, the sum of the radius of the annular groove and the length of one sliding block (7) is equal to the radius of a large-diameter hole of a guide seat (9), a guide conical surface is arranged at the end part of the lower end of the hobbing core shaft (14), a second shaft section (2) is arranged above the first shaft section (3), and the diameter of the second shaft section (2) is the same as the diameter of an inner hole of a workpiece (1); the lower end of a mounting flange (15) of the hobbing mandrel (14) is fixedly connected with a pressing sleeve (13) for pressing a workpiece.

2. The gear hobbing fixture of claim 1, wherein: the cover has one to push away cover (12) between pressing cover (13) and gear hobbing dabber (14), push away the inner wall and gear hobbing dabber (14) sliding fit of cover (12), push away the excircle and press cover (13) inner wall sliding fit of cover (12), push away and form an annular cavity (6) between cover (12) up end and gear hobbing dabber (14), the pressure cover (13), connector (16) and gear hobbing dabber (14) are equipped with the air flue of intercommunication, and the air flue of gear hobbing dabber (14) accesss to annular cavity (6).

3. The gear hobbing fixture of claim 2, wherein: the upper end of the push sleeve (12) is provided with a flange, and the periphery of the flange is in sliding fit with the inner wall of the pressing sleeve (13).

4. The gear hobbing fixture of claim 1, wherein: the guide hole (52) of the pull rod (5) is a square hole, and correspondingly, the section of the sliding block (7) is rectangular.

5. The gear hobbing fixture of claim 1, wherein: the hole opening of the guide hole (52) is provided with a limiting groove (53), a pin (8) is inserted into the sliding block (7), and the pin (8) extends into the limiting groove (53) and is limited by the limiting groove (53).

6. The gear hobbing fixture of claim 1, wherein: the pull rod (5) is provided with an exhaust hole (54).

7. The gear hobbing fixture of claim 1, wherein: the end face, close to the circle center, of the sliding block (7) is a concave arc face, the radius of the concave arc face is the same as that of an annular groove of the hobbing mandrel (14), the end face, far away from the circle center, of the concave arc face is a convex arc face, and the radius of the convex arc face is the same as that of a large-diameter hole of the guide seat (9).