CN216370524U - Internal spline class gear grinding fixture - Google Patents

Internal spline class gear grinding fixture Download PDF

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Publication number
CN216370524U
CN216370524U CN202123213575.6U CN202123213575U CN216370524U CN 216370524 U CN216370524 U CN 216370524U CN 202123213575 U CN202123213575 U CN 202123213575U CN 216370524 U CN216370524 U CN 216370524U
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China
Prior art keywords
hole
clamp
diameter
cone
elastic
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Active
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CN202123213575.6U
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Chinese (zh)
Inventor
颜建荣
盛琦
陈建华
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WENLING MINGHUA GEAR CO Ltd
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WENLING MINGHUA GEAR CO Ltd
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Priority to CN202123213575.6U priority Critical patent/CN216370524U/en
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Abstract

The utility model belongs to the technical field of clamps, in particular to a gear grinding clamp for an internal spline gear; the upper end of the chassis is provided with a clamp body, an inner hole is formed in the chassis, a blind hole is formed in the clamp body, an ejector rod is arranged in the inner hole and the blind hole, one end of the ejector rod is abutted against a pull rod, the other end of the ejector rod is elastically connected with the inner top of the blind hole through a first spring, the pull rod is movably arranged in the chassis, the upper end of the clamp body is provided with a cone, more than one ejector pin is arranged on the clamp body around the cone, the lower part of the cone is sleeved with an ejector ring, the upper end of the clamp body is provided with a supporting pad which can be in contact connection with the lower end face of a workpiece, an elastic tip mounting seat is arranged in the gland, an elastic tip is elastically arranged in the elastic tip mounting seat through a second spring, the upper end of an elastic sleeve extends into the gland, a through hole is formed in the elastic sleeve, and the elastic tip and the cone are respectively connected with the two ends of the through hole; the utility model adopts the elastic sleeve to eliminate the fit clearance, has accurate positioning and can realize automatic feeding and discharging.

Description

Internal spline class gear grinding fixture
The technical field is as follows:
the utility model belongs to the technical field of clamps, and particularly relates to a gear grinding clamp for an internal spline gear.
Background art:
the existing gear grinding clamp for the internal spline type gear has two structures, one is to adopt a spline rigid mandrel to position and process, and the other is to adopt a spring mandrel to process. The above two structures have the following disadvantages: firstly, the spline is out of shape after the thermal treatment, and it is big to adopt rigidity mandrel positioning error, and secondly the work piece internal surface is the spline, and the manipulator can't align the spline when snatching the work piece clamping, is difficult to realize unloading in the automation.
The utility model content is as follows:
the utility model aims to provide an internal spline gear grinding clamp which is accurate in positioning and can realize automatic feeding and discharging.
The utility model is realized by the following steps:
a gear grinding clamp for an internal spline gear comprises a gland, a base plate and an elastic sleeve, wherein the gland is arranged on the upper end face of a workpiece in a pressing mode, the base plate is fixedly arranged on a machine tool spindle, the elastic sleeve is inserted into an internal spline hole of the workpiece, a clamp body is arranged at the upper end of the base plate, an inner hole is formed in the base plate, a blind hole is formed in the clamp body, an ejector rod is arranged in the inner hole and the blind hole, one end of the ejector rod is abutted to a pull rod, the other end of the ejector rod is elastically connected with the inner top of the blind hole through a first spring, the pull rod is movably arranged in the base plate and can lift up and down in the base plate, a cone is arranged at the upper end of the clamp body, more than one ejector pin is arranged on the clamp body around the cone, an ejector ring is sleeved at the lower portion of the cone, the lower end of the ejector pin extends into the blind hole to be connected with the end face of the ejector rod in a contact mode, the upper end of the clamp body can extend out of the clamp body to be connected with the bottom face of the ejector ring in a contact mode, a supporting pad is arranged at the upper end face of the clamp body in a contact mode, the cone extends out of the supporting pad, an elastic tip mounting seat is arranged in the gland, an elastic tip is elastically arranged in the elastic tip mounting seat through a second spring, the upper end of the elastic sleeve extends into the gland, a through hole is formed in the elastic sleeve, and the elastic tip and the cone are respectively connected to two ends of the through hole.
In the internal spline type gear grinding clamp, the bottom surface of the chassis is provided with a pull rod mounting hole upwards, the pull rod comprises a main body and a rod part integrally located on the bottom surface of the main body, the depth of the pull rod mounting hole is smaller than the thickness of the main body, the main body is limited in the pull rod mounting hole through a limiting disc, and the rod part penetrates through the limiting disc and extends outwards.
In foretell internal spline class gear grinding anchor clamps, the upper end of the anchor clamps body is provided with the throat, the upper end of throat is provided with the cone, the supporting pad suit is on the throat, the supporting pad sets firmly on the anchor clamps body through the screw.
In the internal spline type gear grinding clamp, the diameter of the lower part of the cone is smaller than that of the necking part, and the top ring is sleeved on the lower part of the cone.
In the internal spline type gear grinding clamp, a spring mounting hole is formed in the upper end of the ejector rod, one end of the first spring is arranged in the spring mounting hole, and the other end of the first spring extends out of the ejector rod and is abutted to the inner hole.
In the internal spline type gear grinding clamp, the lower end of the clamp body is provided with the boss, the boss is inserted into the inner hole of the chassis, and the bottom surface of the clamp body is in contact connection with the upper end surface of the chassis and is fixedly connected with the chassis through the screw.
In the internal spline type gear grinding clamp, the lower end of the through hole is a tapered hole with a small upper inner diameter and a large lower inner diameter.
In the internal spline type gear grinding fixture, a step hole is formed in the elastic tip mounting seat, the diameter of the elastic tip is matched with the inner diameter of the small-diameter part of the step hole, one end of the elastic tip is arranged in the small-diameter part of the step hole, the other end of the elastic tip is located in the large-diameter part of the step hole, an annular convex edge is arranged on the elastic tip, the diameter of the annular convex edge is matched with the inner diameter of the large-diameter part, a limiting piece is arranged on the inner wall of the large-diameter part, one end of the second spring is tightly pressed on the step surface of the step hole, the other end of the second spring is tightly pressed on the upper plane of the annular convex edge, and the elastic tip is connected with the lower end face of the annular convex edge through the limiting piece in a contact mode to carry out axial limiting.
Compared with the prior art, the utility model has the outstanding advantages that:
1. the utility model adopts the elastic sleeve to eliminate the fit clearance, and the positioning precision is high;
2. compared with the defect that automatic feeding and discharging cannot be realized due to the fact that splines cannot be aligned when a manipulator grabs a workpiece for clamping in the prior art, the automatic feeding and discharging device adopts a structure that the elastic sleeve is separated from the clamp body, the elastic sleeve is placed in a spline hole of the workpiece in advance, and the elastic sleeve is grabbed by the manipulator and then placed in the clamp body, so that automatic feeding and discharging can be conveniently realized.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the female spline elastomeric sleeve of the present invention disposed within a workpiece.
In the figure: 1. a workpiece; 2. a gland; 3. a chassis; 4. an elastic sleeve; 5. a clamp body; 6. an inner bore; 7. a top rod; 8. a pull rod; 9. a first spring; 10. a cone; 11. a knock pin; 12. a top ring; 13. a support pad; 14. An elastic center; 15. a through hole; 16. an elastic center mounting seat; 17. a second spring; 18. a pull rod mounting hole; 19. a limiting disc; 20. a boss; 21. a through hole; 22. a stepped bore; 23. an annular convex edge; and 24, a limiting sheet.
The specific implementation mode is as follows:
the utility model will now be further described by way of specific examples, with reference to FIGS. 1-2:
the utility model provides an internal spline class gear grinding anchor clamps, includes that the terminal surface can press the gland 2 of establishing the up end of work piece 1, sets firmly chassis 3 on the lathe main shaft down, inserts the downthehole elastic sleeve 4 of internal spline of establishing work piece 1, is provided with the anchor clamps body 5 in the upper end of chassis 3, be provided with hole 6 in the chassis 3, be provided with the blind hole in the anchor clamps body 4, be provided with ejector pin 7 in hole 6, the blind hole including, the one end butt of ejector pin 7 is on pull rod 8, the other end passes through first spring 9 elastic connection with the interior top of blind hole, pull rod 8 activity sets up in chassis 3, pull rod 8 can go up and down in chassis 3, the upper end of anchor clamps body 5 is provided with cone 10, is provided with more than one knock pin 11 on the anchor clamps body 5 around cone 10, the lower part cover of cone 10 is equipped with knock ring 12, the lower extreme of knock pin 11 stretches into the blind hole and is connected with the end face contact of ejector pin 7, The upper end of the clamp body 5 can extend out of the bottom surface of the clamp body 5 to be in contact connection with the top ring 12, a supporting pad 13 which can be in contact connection with the lower end surface of the workpiece 1 is arranged at the upper end of the clamp body 5, the cone 10 extends out of the supporting pad 13, an elastic tip mounting seat 16 is arranged in the gland 2, an elastic tip 14 is elastically arranged in the elastic tip mounting seat 16 through a second spring 17, the upper end of the elastic sleeve 4 extends into the gland 2, a through hole 15 is formed in the elastic sleeve 4, and the elastic tip 14 and the cone 10 are respectively connected to two ends of the through hole 15. For the convenience of installation, the lower end of the through hole 15 is a tapered hole with a small inner diameter at the top and a large inner diameter at the bottom.
The working principle of the utility model is as follows: the chassis 3 is fixedly arranged on a main shaft of a machine tool, the elastic sleeve 4 is placed in the workpiece 1 in advance and is grabbed by a manipulator and placed into a cone 10 of the clamp body 5, the pull rod 8 moves upwards under the action of a machine tool oil cylinder, at the moment, the pull rod 8, the ejector rod 4, the first spring 9, the ejector pin 11 and the ejector ring 12 are in a rising position to limit the elastic sleeve 4 to be in contact with a conical surface on the cone 10, at the moment, the elastic sleeve 4 is still in a loosening state, after the top tip on the machine tool descends to ensure that the bottom surface of the workpiece 1 is in reliable contact with the supporting pad 13 through the gland 2, the machine tool oil cylinder drives the pull rod 8 to descend, at the moment, the ejector rod 4, the first spring 9, the ejector pin 11 and the ejector ring 12 start to descend, and the elastic tip 14 pushes the elastic sleeve 4 to descend to be in contact with and expand with the cone 10 of the clamp body 5 under the action of the second spring 17, so that the workpiece 1 is clamped in a centering manner.
Specifically, the pull rod 8 can be lifted up and down in the chassis 3 through the following structure: the bottom surface of chassis 3 has seted up pull rod mounting hole 18 up, pull rod 8 includes main part and integrative pole portion that is located the main part bottom surface, the degree of depth of pull rod mounting hole 18 is less than the thickness of main part, the main part is spacing in pull rod mounting hole 18 through spacing dish 19, pole portion passes spacing dish 19 and outwards stretches out, is connected with the lathe hydro-cylinder.
In order to reduce the resistance of the pull rod 8 to lift in the pull rod mounting hole 18, the main body is clamped with a through hole 21 communicating the upper end surface and the lower end surface of the main body.
The upper end of the clamp body 5 is provided with a necking part, the upper end of the necking part is provided with a cone 10, the supporting pad 13 is sleeved on the necking part, and the supporting pad 13 is fixedly arranged on the clamp body 5 through a screw. The diameter of the lower portion of the cone 10 is smaller than that of the necking portion, the top ring 12 is sleeved on the lower portion of the cone 10, after installation, the top ring 12 is located in the supporting pad 13, and the aperture of the inner hole of the supporting pad 13 is larger than the outer diameter of the elastic sleeve 4.
In order to realize the positioning of the first spring 9, a spring mounting hole is formed in the upper end of the ejector rod 7, one end of the first spring 9 is arranged in the spring mounting hole, and the other end of the first spring extends out of the ejector rod 7 to be abutted to the inner hole.
The lower end of the clamp body 5 is provided with a boss 20, the boss 20 is inserted into an inner hole 6 of the chassis 3, and the bottom surface of the clamp body 5 is in contact connection with the upper end surface of the chassis 3 and is fixedly connected with the chassis 3 through a screw.
In the utility model, the connection structure of the spring center 14 and the spring center mounting seat 16 is as follows: a step hole 22 is formed in the elastic tip mounting seat 16, the diameter of the elastic tip 14 is matched with the inner diameter of the small-diameter portion of the step hole 22, one end of the elastic tip 14 is arranged in the small-diameter portion of the step hole 22, the other end of the elastic tip is located in the large-diameter portion of the step hole 22, an annular convex edge 23 is arranged on the elastic tip 14, the diameter of the annular convex edge 23 is matched with the inner diameter of the large-diameter portion, a limiting piece 24 is arranged on the inner wall of the large-diameter portion, one end of the second spring 17 is tightly propped against the step surface of the step hole 22, the other end of the second spring 17 is tightly propped against the upper plane of the annular convex edge 23, and the elastic tip 14 is in contact connection with the lower end face of the annular convex edge 23 through the limiting piece 24 to perform axial limiting.
When the workpiece 1 is positioned between the supporting pad 13 and the gland 2, the second spring 17 always applies a downward force to the elastic center 14 to drive the elastic sleeve 4 to move downward to contact with the cone 10 of the fixture body 5 to expand, so that the workpiece 1 is centered and clamped.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered by the protection scope of the utility model.

Claims (8)

1. The utility model provides an internal spline class gear grinding anchor clamps which characterized in that: comprises a gland (2) with the lower end surface capable of pressing the upper end surface of a workpiece (1), a chassis (3) fixedly arranged on a machine tool main shaft, and an elastic sleeve (4) inserted in an inner spline hole of the workpiece (1), wherein a clamp body (5) is arranged at the upper end of the chassis (3), an inner hole (6) is arranged in the chassis (3), a blind hole is arranged in the clamp body (5), an ejector rod (7) is arranged in the inner hole (6) and the blind hole, one end of the ejector rod (7) is abutted against a pull rod (8), the other end of the ejector rod is elastically connected with the inner top of the blind hole through a first spring (9), the pull rod (8) is movably arranged in the chassis (3), the pull rod (8) can vertically lift in the chassis (3), a cone (10) is arranged at the upper end of the clamp body (5), more than one ejector pin (11) is arranged on the clamp body (5) around the cone (10), the lower part of the cone (10) is sleeved with a top ring (12), the lower end of the top pin (11) extends into the blind hole to be in contact connection with the end face of the top rod (7), the upper end of the top pin can extend out of the bottom face of the clamp body (5) to be in contact connection with the top ring (12), a supporting pad (13) which can be in contact connection with the lower end face of the workpiece (1) is arranged at the upper end of the clamp body (5), the cone (10) extends out of the supporting pad (13), an elastic tip mounting seat (16) is arranged in the gland (2), an elastic tip (14) is elastically arranged in the elastic tip mounting seat (16) through a second spring (17), the upper end of the elastic sleeve (4) extends into the gland (2), a through hole (15) is formed in the elastic sleeve (4), and the elastic tip (14) and the cone (10) are respectively connected to two ends of the through hole (15).
2. The internal spline type gear grinding jig according to claim 1, characterized in that: the bottom surface of chassis (3) has seted up pull rod mounting hole (18) up, pull rod (8) include main part and integrative pole portion that is located the main part bottom surface, the degree of depth of pull rod mounting hole (18) is less than the thickness of main part, the main part is spacing in pull rod mounting hole (18) through spacing dish (19), pole portion passes spacing dish (19) and outwards stretches out.
3. The internal spline type gear grinding jig according to claim 1, characterized in that: the upper end of the clamp body (5) is provided with a necking part, the upper end of the necking part is provided with a cone (10), the supporting pad (13) is sleeved on the necking part, and the supporting pad (13) is fixedly arranged on the clamp body (5) through a screw.
4. The internal spline type gear grinding jig according to claim 3, wherein: the diameter of the lower part of the cone (10) is smaller than that of the necking part, and the top ring (12) is sleeved on the lower part of the cone (10).
5. The internal spline type gear grinding jig according to claim 1, characterized in that: the upper end of the ejector rod (7) is provided with a spring mounting hole, one end of the first spring (9) is arranged in the spring mounting hole, and the other end of the first spring extends out of the ejector rod (7) to be abutted to the inner hole.
6. The internal spline type gear grinding jig according to claim 1, characterized in that: the lower end of the clamp body (5) is provided with a boss (20), the boss (20) is inserted into an inner hole (6) of the chassis (3), the bottom surface of the clamp body (5) is in contact connection with the upper end surface of the chassis (3) and is fixedly connected with the chassis (3) through a screw.
7. The internal spline type gear grinding jig according to claim 1, characterized in that: the lower end of the through hole (15) is a conical hole with a small inner diameter at the top and a large inner diameter at the bottom.
8. The internal spline type gear grinding jig according to claim 1, characterized in that: the elastic center mounting seat is characterized in that a stepped hole (22) is formed in the elastic center mounting seat (16), the diameter of the elastic center (14) is matched with the inner diameter of the small-diameter portion of the stepped hole (22), one end of the elastic center (14) is arranged in the small-diameter portion of the stepped hole (22), the other end of the elastic center is located in the large-diameter portion of the stepped hole (22), an annular convex edge (23) is arranged on the elastic center (14), the diameter of the annular convex edge (23) is matched with the inner diameter of the large-diameter portion, a limiting piece (24) is arranged on the inner wall of the large-diameter portion, one end of a second spring (17) is tightly pressed on the stepped surface of the stepped hole (22), the other end of the second spring is tightly pressed on the upper plane of the annular convex edge (23), and the elastic center (14) is in contact connection with the lower end face of the annular convex edge (23) through the limiting piece (24) to carry out axial limiting.
CN202123213575.6U 2021-12-17 2021-12-17 Internal spline class gear grinding fixture Active CN216370524U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123213575.6U CN216370524U (en) 2021-12-17 2021-12-17 Internal spline class gear grinding fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123213575.6U CN216370524U (en) 2021-12-17 2021-12-17 Internal spline class gear grinding fixture

Publications (1)

Publication Number Publication Date
CN216370524U true CN216370524U (en) 2022-04-26

Family

ID=81237063

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202123213575.6U Active CN216370524U (en) 2021-12-17 2021-12-17 Internal spline class gear grinding fixture

Country Status (1)

Country Link
CN (1) CN216370524U (en)

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