CN213531110U

CN213531110U - Workpiece clamp on gear scraping machine

Info

Publication number: CN213531110U
Application number: CN202022627879.6U
Authority: CN
Inventors: 罗成
Original assignee: Zhejiang Laolunsi Machine Tool Co ltd
Current assignee: Zhejiang Laolunsi Machine Tool Co ltd
Priority date: 2020-11-14
Filing date: 2020-11-14
Publication date: 2021-06-25
Anticipated expiration: 2030-11-14

Abstract

The utility model discloses a workpiece fixture on a gear scraping machine, which is fixed on a workbench, and comprises a base fixed on the workbench, a supporting seat arranged on the base and a locking device used for movably fixing a workpiece on the supporting seat, wherein the locking device comprises a centering sleeve arranged in a guide hole at the center of the supporting seat, the centering sleeve realizes the up-and-down movement along the axial direction through a driving device, and the up-and-down movement along the axial direction of the centering sleeve is realized, so that a plurality of radial internal support structures which are circumferentially distributed and are arranged on the supporting seat are pushed to move along the radial direction, and the inner wall of the workpiece is fixedly supported; the driving device also drives the compressing structures to move up and down, so that the compressing structures and the supporting seat clamp the workpiece together. The utility model discloses can center and press from both sides tightly the work piece, realize mechanical automation, improve clamping efficiency and stability.

Description

Workpiece clamp on gear scraping machine

Technical Field

The utility model belongs to the technical field of frock clamp, concretely relates to scrape work piece holder on tooth machine.

Background

In recent years, gear scraping machining becomes an emerging machining mode of cylindrical gears, a main shaft of a gear scraping machine is high in cutting force, high in rigidity and high in machining efficiency, and higher requirements are put forward on clamping efficiency and stability of a machine tool clamp. The existing gear scraping machine has an obvious using effect in the field of engineering machinery, the clamping mode and the clamping time of a workpiece become a problem to be solved urgently by efficient processing, and the overall output efficiency is restricted. Meanwhile, clamping and positioning modes are different due to different shapes of workpieces, and fixture interfaces of the machine tool are fixed, so that great difficulty is brought to fixture design, a plurality of workpieces are still processed by adopting a traditional processing mode, and the use performance of the gear scraping machine cannot be fully exerted except that the equipment investment is increased.

Disclosure of Invention

Therefore, the main objective of the present invention is to solve the above problems and to provide a work holder for a gear scraping machine.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a workpiece fixture on a gear scraping machine, which is fixed on a workbench, and comprises a base fixed on the workbench, a supporting seat arranged on the base, and a locking device for movably fixing a workpiece on the supporting seat, wherein the locking device comprises a centering sleeve arranged in a guiding hole at the center of the supporting seat, the centering sleeve is axially moved up and down by a driving device, and is axially moved up and down by the centering sleeve, so as to push a plurality of radially inner supporting structures which are circumferentially and uniformly distributed and are arranged on the supporting seat to radially move, thereby fixedly supporting the inner wall of the workpiece; the driving device also drives the compressing structures to move up and down, so that the compressing structures and the supporting seat clamp the workpiece together.

The driving device comprises a lower pull rod, an oil cylinder and an elastic element, wherein a stroke rod of the oil cylinder is fixedly connected with the lower pull rod, the lower pull rod penetrates through the centering sleeve, the elastic element is arranged between the lower pull rod and the centering sleeve, and therefore when the lower pull rod is pulled by the oil cylinder along the axial direction, the lower pull rod acts on the elastic element and then drives the centering sleeve to move along the axial direction.

The lower pull rod comprises a guide table and an insertion rod arranged on the guide table, the guide table is located in a guide groove of the base, when the lower pull rod moves up and down, the guide table moves up and down in the guide groove, and the insertion rod penetrates through a jack of the centering sleeve.

The elastic element is a spring, the spring is sleeved on the upper portion of the lower pull rod, a baffle is arranged at the top end of the lower pull rod, the upper end of the spring abuts against the baffle, and the lower end of the spring abuts against a baffle in the centering sleeve, so that the spring has upward elastic force along the axial direction on the lower pull rod.

The inner supporting structure comprises an automatic centering rod, an elastic piece and an inner supporting block, the inner end of the automatic centering rod is provided with a stress inclined plane, the stress inclined plane is attached to abut against a driving inclined plane on the outer wall of the centering sleeve, the inner supporting block is fixed on the automatic centering rod, and the elastic piece always has elasticity moving inwards along the radial direction to the automatic centering rod.

The elastic piece is a spring hoop which is embedded in embedding grooves of automatic centering rods of a plurality of internal support structures.

The pressing structure comprises a fixed seat arranged on the base, a rotating rod inserted in a central hole of the fixed seat and having the moving direction consistent with that of the lower pull rod, and a pressing plate fixed at the upper end of the rotating rod, wherein the lower end of the rotating rod is movably inserted in the rotating hole of the lower pull rod; and a rotating device is arranged between the rotating rod and the central hole, and when the rotating rod moves axially along the central hole, the rotating rod rotates around the central line of the rotating device under the action of the rotating device, so that the pressing plate is positioned right above the workpiece or leaves the position right above the workpiece.

Rotating device is including setting up the helicla flute and the pin of setting on the fixing base at the rotary rod outer wall, the pin sets up on the fixing base, and the inner of pin matches in the helicla flute, when the rotary rod reciprocated along the axial, received the limiting displacement of pin, and the helicla flute realizes the removal of spiral orbit along the pin to make the rotary rod realize rotatoryly.

The utility model has the advantages that:

the utility model discloses a scrape the work piece holder on the tooth machine, pretightning force through the spring, realize the downstream to the centering cover, thereby make the drive inclined plane of centering cover promote the atress inclined plane of automatic centering pole, then make automatic centering pole along radial outside removal, thereby make the fixed inner wall that props at the work piece of automatic centering pole, make the work piece centering, and make the lower part of work piece obtain fixing, meanwhile, the rotary rod moves down along the axial, the clamp plate is rotatory to be reachd directly over the work piece and just to be pressed on the top of work piece, thereby the realization compresses tightly the upper portion of work piece, finally, realize the self-holding to the work piece, and have a firm clamp.

Drawings

FIG. 1 is a schematic structural view of a work holder of the gear scraping machine of the present invention;

FIG. 2 is an exploded perspective view of an inner support structure of a work holder of the gear scraping machine of the present invention;

fig. 3 is an exploded perspective view of the pressing structure of the work holder of the gear scraping machine of the present invention.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

referring to fig. 1 to 3, the utility model provides a workpiece holder on a gear scraping machine, which is fixed on a workbench 1, and comprises a base 2 fixed on the workbench 1, a support seat 3 arranged on the base 2, and a locking device 5 for movably fixing a workpiece 4 on the support seat 3, wherein the locking device 5 comprises a centering sleeve 7 arranged in a guide hole 6 at the center of the support seat 3, the centering sleeve 7 axially moves up and down through a driving device 8, and the centering sleeve 7 axially moves up and down through the centering sleeve 7, so as to push a plurality of radial inner supporting structures 9 which are circumferentially and uniformly distributed and are arranged on the support seat 3 to radially move, thereby fixedly supporting the inner wall of the workpiece 4; the driving device 8 also drives a plurality of pressing structures 10 to move up and down, so that the pressing structures 10 and the supporting seat 3 clamp the workpiece together.

The driving device 8 comprises a lower pull rod 11, an oil cylinder 12 and an elastic element 13, a stroke rod of the oil cylinder 12 is fixedly connected with the lower pull rod 11, the lower pull rod 11 penetrates through the centering sleeve 7, the elastic element is arranged between the lower pull rod 11 and the centering sleeve 7, and therefore when the lower pull rod 11 is pulled by the oil cylinder 12 along the axial direction, the lower pull rod 11 acts on the elastic element to drive the centering sleeve 7 to move along the axial direction.

The lower pull rod 11 comprises a guide table 14 and an insertion rod 15 arranged on the guide table 14, the guide table 14 is located in a guide groove 16 of the base 2, when the lower pull rod 11 moves up and down, the guide table 14 moves up and down in the guide groove 16, and the insertion rod 15 penetrates through a jack of the centering sleeve 7.

The elastic element is a spring 18, the spring 18 is sleeved on the upper portion of the lower pull rod 11, a blocking piece 19 is arranged at the top end of the lower pull rod 11, the upper end of the spring 18 abuts against the blocking piece 19, and the lower end of the spring 18 abuts against a blocking plate 20 in the centering sleeve 7, so that the spring 18 has upward elastic force along the axial direction on the lower pull rod 11.

Interior stay structure 9 includes self-centering pole 21, elastic component 22 and interior vaulting block 23, self-centering pole 21's the inner has atress inclined plane 24, the laminating of atress inclined plane 24 is supported and is leaned on the drive inclined plane 25 of centering cover 7 outer wall, interior vaulting block 23 is fixed on self-centering pole 21, and elastic component 22 has the elasticity along radial inside removal to self-centering pole 21 all the time.

The elastic part 22 is an elastic hoop which is embedded in an embedding groove 26 of the automatic centering rods 21 of the internal supporting structures 9, the embedding groove 26 is composed of an internal supporting block 23 and the automatic centering rods 21, and the installation table 27 is arranged on the automatic centering rods 21, and the internal supporting block 23 is fixed on the installation table 27, so that the embedding groove 26 is formed between the internal supporting block 23 and the automatic centering rods 21. The utility model discloses an elasticity hoop can be the elastic ring that the rubber material preparation formed, perhaps spring coil etc..

The pressing structure 10 comprises a fixed seat 28 arranged on the base 2, a rotating rod 30 inserted in a central hole 29 of the fixed seat 28 and having a moving direction consistent with that of the lower pull rod 11, and a pressing plate 31 fixed at the upper end of the rotating rod 30, wherein the lower end of the rotating rod 30 is movably inserted in a rotating hole 32 of the lower pull rod 11; a rotating device 33 is arranged between the rotating rod 30 and the central hole 29, and when the rotating rod 30 moves axially along the central hole 29, the rotating rod 30 rotates around the central line thereof under the action of the rotating device 33, so that the pressure plate 31 is positioned right above the workpiece 4 or away from the right above the workpiece 4.

The rotating device 33 comprises a spiral groove 34 arranged on the outer wall of the rotating rod 30 and a pin 35 arranged on the fixing seat 28, the pin 35 is in threaded connection with a screw hole of the fixing seat 28, the inner end of the pin 35 extends to the central hole 29, so that the pin 35 is matched with the spiral groove 34, when the rotating rod 30 moves up and down along the axial direction, the spiral groove 34 realizes the movement of a spiral track along the pin 35 under the limiting effect of the pin 35, and the rotating rod 30 is enabled to rotate.

The following explanation is made on the working principle of the workpiece clamp on the gear scraping machine of the utility model:

the utility model discloses a scrape the work piece holder on the tooth machine, workstation 1 is for scraping the workstation on the tooth lathe, and hydro-cylinder 12 is fixed on workstation 1, and lower link 11 has guide table 14, and base 2's guide way 16 has direction and limiting displacement to guide table 14 to make lower link 11 when reciprocating, more stable, smooth and easy, do not shake, under the effect of hydro-cylinder 12, fixed stroke's motion about lower link 11 can realize.

The base 2 of the clamp is fixed on the workbench 1 through bolts, the supporting seat 3 is installed on the base 2 and used for supporting a workpiece, the structure of the supporting seat 3 is matched with the workpiece 4, the centering sleeve 7 can accurately slide in the guide hole 6 of the supporting seat 3 along the axial direction, and the stress inclined plane 24 of the automatic centering rod 21 is always attached to and contacted with the driving inclined plane 25 on the centering sleeve 7 through the elastic piece 22 in the circumferential direction. At the same time, the centering sleeve 7 is connected to the lower tie rod 11 by means of a spring 18.

The front of the automatic centering rod 21 is provided with an inner supporting block 23, and the corresponding size block can be replaced according to the size of different workpieces 4. The pressing plate 31 is fixed on the rotating rod 30, the rotating rod 30 is provided with the spiral groove 34, the rotating rod 30 is enabled to rotate synchronously in the up-and-down movement process through the pin 35 installed in the fixed seat 28 on the base 2, therefore, the pressing plate 31 acts according to the design requirement, the workpiece 4 is loosened and pressed, when the pressing plate 31 loosens the workpiece 4, actually, the pressing plate 31 is not positioned right above the workpiece 4, and the workpiece 4 is more convenient to take and place. The lower end of the rotating rod 30 is directly inserted into the rotating hole 32 of the lower pull rod 11, the lower end of the rotating rod 30 is sleeved with a bearing, and the bearing is located in the rotating hole 32, so that the rotating rod 30 can rotate smoothly relative to the rotating hole 32, meanwhile, the elastic element 37 and the locking nut 36 are installed at the lower end of the rotating rod 30, so that the rotating rod 30 and the lower pull rod 11 are connected in place, the rotating rod 30 is prevented from being separated from the lower pull rod 11, and the elastic element 37 involved here can be a spring and an elastic pad.

The overall action of the clamp is that the lower pull rod 11 moves downwards under the action of the oil cylinder 12, the inserted rod of the lower pull rod 11 downwards extrudes the spring 18, then the centering sleeve 7 and the rotating rod 30 are driven to move downwards, the inner support blocks 23 move outwards along the radial direction to center the workpiece 4 and have a certain fixing effect on the workpiece 4, the lower pull rod 11 continues to move downwards, the pressing plate 31 compresses the workpiece 4 tightly, in the process, the rotating rod 30 moves downwards and rotates simultaneously, and the pressing plate 31 is just positioned on the top surface of the workpiece 4 when the pressing plate 31 compresses the workpiece 4.

According to the size of the workpiece 4, a plurality of inner supporting blocks 23 and a plurality of pressing plates 31 are uniformly distributed on the circumference, and usually 3 or more are uniformly distributed.

The design method of the gear scraping machine clamp is characterized in that:

1. the pre-tightening of the spring 18 needs to be carried out according to the weight of the workpiece so as to push the workpiece, and the pressing force of the workpiece 4 is prevented from being reduced due to the transitional pre-tightening.

2. The elastic force of the elastic part 22 cannot be too large, and the requirement that the automatic centering rod 21 is always contacted with the centering sleeve 7 is met.

3. The spring 18 is selected with reference to the tension of the lower link 11 and is required to withstand the maximum tension of the lower link 11.

4. The rotating rod 30 moves downward under the driving of the lower pull rod 11 and performs a rotating motion at the same time, so as to reasonably adjust the locking force between the rotating rod and the lower pull rod.

The above detailed description is made on the work piece holder on the gear scraping machine provided by the embodiment of the present invention, and the specific examples are applied herein to explain the principle and the implementation manner of the present invention, and the description of the above embodiments is only used to help understand the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a workpiece clamp on gear scraping machine which characterized in that: the locking device comprises a centering sleeve arranged in a guide hole in the center of the supporting seat, the centering sleeve axially moves up and down through a driving device, and the centering sleeve axially moves up and down through the axial direction of the centering sleeve, so that a plurality of radial inner support structures which are circumferentially and uniformly distributed and are arranged on the supporting seat are pushed to move along the radial direction, and the radial inner support structures are fixedly supported on the inner wall of a workpiece; the driving device also drives the compressing structures to move up and down, so that the compressing structures and the supporting seat clamp the workpiece together.

2. The work holder on a gear shaving machine as claimed in claim 1, characterized in that: the driving device comprises a lower pull rod, an oil cylinder and an elastic element, wherein a stroke rod of the oil cylinder is fixedly connected with the lower pull rod, the lower pull rod penetrates through the centering sleeve, the elastic element is arranged between the lower pull rod and the centering sleeve, and therefore when the lower pull rod is pulled by the oil cylinder along the axial direction, the lower pull rod acts on the elastic element and then drives the centering sleeve to move along the axial direction.

3. The work holder on a gear shaving machine as claimed in claim 2, characterized in that: the lower pull rod comprises a guide table and an insertion rod arranged on the guide table, the guide table is located in a guide groove of the base, when the lower pull rod moves up and down, the guide table moves up and down in the guide groove, and the insertion rod penetrates through a jack of the centering sleeve.

4. The work holder on a gear shaving machine as claimed in claim 2, characterized in that: the elastic element is a spring, the spring is sleeved on the upper portion of the lower pull rod, a baffle is arranged at the top end of the lower pull rod, the upper end of the spring abuts against the baffle, and the lower end of the spring abuts against a baffle in the centering sleeve, so that the spring has upward elastic force along the axial direction on the lower pull rod.

5. The work holder on a gear shaving machine as claimed in claim 1, characterized in that: the inner supporting structure comprises an automatic centering rod, an elastic piece and an inner supporting block, the inner end of the automatic centering rod is provided with a stress inclined plane, the stress inclined plane is attached to abut against a driving inclined plane on the outer wall of the centering sleeve, the inner supporting block is fixed on the automatic centering rod, and the elastic piece always has elasticity moving inwards along the radial direction to the automatic centering rod.

6. The work holder on a gear shaving machine as claimed in claim 5, characterized in that: the elastic piece is a spring hoop which is embedded in embedding grooves of automatic centering rods of a plurality of internal support structures.

7. The work holder on a gear shaving machine as claimed in claim 1, characterized in that: the pressing structure comprises a fixed seat arranged on the base, a rotating rod inserted in a central hole of the fixed seat and having the moving direction consistent with that of the lower pull rod, and a pressing plate fixed at the upper end of the rotating rod, wherein the lower end of the rotating rod is movably inserted in the rotating hole of the lower pull rod; and a rotating device is arranged between the rotating rod and the central hole, and when the rotating rod moves axially along the central hole, the rotating rod rotates around the central line of the rotating device under the action of the rotating device, so that the pressing plate is positioned right above the workpiece or leaves the position right above the workpiece.

8. The work holder on a gear shaving machine as claimed in claim 7, characterized in that: rotating device is including setting up the helicla flute and the pin of setting on the fixing base at the rotary rod outer wall, the pin sets up on the fixing base, and the inner of pin matches in the helicla flute, when the rotary rod reciprocated along the axial, received the limiting displacement of pin, and the helicla flute realizes the removal of spiral orbit along the pin to make the rotary rod realize rotatoryly.