CN220782486U - Frock clamp for gear - Google Patents
Frock clamp for gear Download PDFInfo
- Publication number
- CN220782486U CN220782486U CN202322465319.9U CN202322465319U CN220782486U CN 220782486 U CN220782486 U CN 220782486U CN 202322465319 U CN202322465319 U CN 202322465319U CN 220782486 U CN220782486 U CN 220782486U
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- China
- Prior art keywords
- radial
- rod
- push rod
- cone
- expansion sleeve
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000003754 machining Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- Jigs For Machine Tools (AREA)
Abstract
The utility model discloses a fixture for gears, which comprises a base, an outer cone mandrel, an inner cone expansion sleeve and a pull rod, wherein the outer cone mandrel is vertically fixed on the base, the inner cone expansion sleeve is movably sleeved on the outer cone mandrel, and the pull rod is arranged in the base in a penetrating way and the upper end of the pull rod is connected with the inner cone expansion sleeve, and is characterized in that: the middle part of the upper end surface of the outer cone mandrel is sunken to form an inner cavity; the outer cone mandrel is characterized in that a plurality of radial sliding holes communicated with the inner cavity are formed in the outer peripheral wall of the outer cone mandrel along the same circumferential line, a radial ejector rod which is used for tightly propping against the inner peripheral wall of the inner cone expansion sleeve is arranged in each radial sliding hole in a sliding mode, an axial push rod is arranged in the inner cavity in a penetrating mode along the axial direction, the axial push rod is in sliding fit with the radial ejector rod through an inclined surface structure, and a driving structure used for driving the axial push rod to axially move is connected to the axial push rod. This structure can provide better internal expanding centre gripping effect, avoids lax processing to beat that leads to.
Description
Technical Field
The utility model belongs to the field of machine tool machining equipment, and particularly relates to a tool clamp for gears.
Background
For gears with soft tooth surfaces and medium and hard tooth surfaces, gear hobbing is a final machining process of the tooth parts and is also the most critical factor for determining the gear precision, so that strict clamping and positioning requirements are applied to the inner holes and the end surfaces of the gears during gear hobbing so as to ensure the machining precision of the gears. In the gear machining field, most of the gears are clamped by utilizing a hydraulic expansion clamp, and the inner cone expansion sleeve is driven to move on the outer cone mandrel to deform and expand outwards by utilizing the structure consisting of the outer cone mandrel, the inner cone expansion sleeve and the pull rod through hydraulic downward pulling, so that the inner hole of the gear is expanded. In the process, the pressure of the hydraulic driving system is unstable, so that the clamping process may be loosened to cause machining runout, and the unqualified parts are more.
Disclosure of utility model
The technical problem to be solved by the utility model is to overcome the problem and provide the tooling fixture for the gear, which has better internal expansion clamping effect.
The technical scheme of the utility model is as follows:
The utility model provides a frock clamp for gear, includes base, outer cone dabber, interior cone expansion sleeve, pull rod, outer cone dabber is vertical to be fixed on the base, and interior cone expansion sleeve movable sleeve is established at outer cone dabber, and the pull rod wears to establish in the base and the upper end is connected interior cone expansion sleeve, its characterized in that: the middle part of the upper end surface of the outer cone mandrel is sunken to form an inner cavity; the outer cone mandrel is characterized in that a plurality of radial sliding holes communicated with the inner cavity are formed in the outer peripheral wall of the outer cone mandrel along the same circumferential line, a radial ejector rod which is used for tightly propping against the inner peripheral wall of the inner cone expansion sleeve is arranged in each radial sliding hole in a sliding mode, an axial push rod is arranged in the inner cavity in a penetrating mode along the axial direction, the axial push rod is in sliding fit with the radial ejector rod through an inclined surface structure, and a driving structure used for driving the axial push rod to axially move is connected to the axial push rod.
With the structure, on the basis that the pull rod pulls the inner cone expansion sleeve to expand tightly, each radial ejector rod is pushed to radially extend outwards by the axial ejector rod, so that the inner cone expansion sleeve is tightly propped against the inner peripheral wall of the inner cone expansion sleeve, the inner cone expansion sleeve always keeps the trend of expanding outwards, the effect of expanding the gear in the inner cone expansion sleeve is improved, the clamping is firmer, and the processing quality of the gear is remarkably improved.
Furthermore, in the tooling fixture for the gear, the inner end of the radial ejector rod is provided with the anti-falling protruding block for preventing the radial ejector rod from falling out of the outer end of the radial sliding hole.
Further, in the tooling fixture for the gear, the inclined surface structure comprises an inverted circular truncated cone block arranged at the lower end of the axial push rod, and the anti-falling protruding block is provided with an inclined cambered surface which is matched with the outer circular truncated cone surface of the inverted circular truncated cone block. The axial displacement of the axial push rod is converted into the radial displacement of the anti-drop lug and the radial push rod by utilizing the sliding fit of the inclined surface of the inclined arc surface of the rounded table surface and the anti-drop lug, so as to realize radial expansion.
Furthermore, in the tooling fixture for the gear, a plurality of guide posts are convexly arranged on the bottom surface of the inner cavity, a plurality of guide holes are correspondingly arranged in the inverted circular truncated cone block, and the guide posts are correspondingly arranged in the guide holes in a penetrating manner one by one and are used for guiding the inverted circular truncated cone block to only perform axial displacement movement.
Furthermore, in the tooling fixture for the gear, the radial ejector rod is sleeved with the reset spring, the reset spring is abutted between the anti-falling convex block and the radial sliding hole, and the radial ejector rod is retracted and reset through the reset spring, so that the axial ejector rod and the radial ejector rod are always in inclined surface contact fit.
Further, in the tooling fixture for the gear, the driving structure comprises a cover plate and a screwing screw rod, wherein the cover plate is arranged above the inner cavity in a covering manner, a threaded hole is formed in the center of the cover plate, the screwing screw rod is in threaded connection with the threaded hole, and the lower end of the screwing screw rod is rotatably sleeved outside the axial push rod. The driving mode is simple and easy, and the axial displacement of the axial push rod is driven by screwing the screw rod in and out of the cover plate.
Further, in the tooling fixture for the gear, the radial sliding holes are at least three evenly arranged along the circumference.
Furthermore, in the tooling fixture for the gear, the outer end of the radial ejector rod is sleeved with the rubber sleeve, so that the inner cone expansion sleeve is prevented from being damaged by abrasion.
The beneficial effects of the utility model are as follows:
1. The utility model can provide inner propping acting force for the inner cone expansion sleeve by the linkage of the axial push rod and the radial push rod on the basis of pulling the inner cone expansion sleeve by the pull rod to expand, so that the inner cone expansion sleeve always keeps the outer expansion trend, the defect that the single hydraulic tensioning is subject to the stability of a hydraulic system is avoided, the expansion clamping effect on the gear is remarkable, the positioning precision can be ensured, the processing efficiency is effectively improved, and the quality of gear products is improved.
2. The utility model improves the expansion effect through the hidden structure of the inner cavity, does not additionally increase the volume of the fixture, and has compact and small structure.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged schematic view of the circle of fig. 1.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings:
Referring to fig. 1 and 2, this embodiment provides a tooling fixture for gears, including base 1, outer cone dabber 2, interior cone expansion sleeve 3, pull rod 4, outer cone dabber 2 is vertical to be fixed on the base, and interior cone expansion sleeve 3 movable sleeve is established on outer cone dabber 2, and pull rod 4 wears to establish in base 1 and the upper end is connected interior cone expansion sleeve 3. The middle part of the upper end surface of the outer cone mandrel 2 is sunken to form an inner cavity 6; at least three radial sliding holes 7 communicated with the inner cavity are uniformly formed in the peripheral wall of the outer cone mandrel 2 along the same circumferential line, and a radial ejector rod 8 used for tightly propping against the inner peripheral wall of the inner cone expansion sleeve 3 is arranged in each radial sliding hole 7 in a sliding manner. The outer end of the radial ejector rod 8 is sleeved with a rubber sleeve (not shown in the figure), and the inner end of the radial ejector rod 8 is provided with an anti-falling bump 11 for preventing the radial ejector rod 8 from falling out of the outer end of the radial sliding hole 7. The radial ejector rod 8 is sleeved with a return spring 13, and the return spring 13 is abutted between the anti-falling lug 11 and the radial sliding hole 7.
An axial push rod 9 is arranged in the inner cavity 6 in a penetrating way along the axial direction, and the axial push rod 9 is in sliding fit with the radial push rod 8 through an inclined surface structure. Specifically, the inclined plane structure includes the inverted circular platform piece 12 of locating axial push rod 9 lower extreme, the slope cambered surface that coincides with the excircle mesa of inverted circular platform piece 12 is equipped with on the anticreep lug 11. The bottom surface of the inner cavity 6 is convexly provided with a plurality of guide posts 5, a plurality of guide holes are correspondingly arranged in the inverted circular truncated cone 12, and the guide posts 5 are correspondingly arranged in the guide holes in a penetrating mode.
The axial push rod 9 is connected with a driving structure for driving the axial push rod 9 to axially move. The driving structure comprises a cover plate 14 and a screwing screw rod 10, wherein the cover plate 14 is arranged above the inner cavity 6 in a covering mode, a threaded hole is formed in the center of the cover plate, the screwing screw rod 10 is in threaded connection with the threaded hole, and the lower end of the screwing screw rod 10 is rotatably sleeved outside the axial push rod 9.
When the embodiment is used, the gear is sleeved on the inner cone expansion sleeve 3, the inner cone expansion sleeve 3 and the gear are pulled downwards through the pull rod 4, and the gear is stopped through the outer expansion effect of the inner cone expansion sleeve 3; thereafter, the screwing screw 10 is rotated to drive the axial push rod 9 to axially move, and through the sliding fit of the outer circular table surface of the inverted circular table block 12 and the inclined cambered surface of the anti-drop convex block 11, each radial push rod 8 is driven to synchronously extend outwards along the respective radial sliding hole 7, so that the rubber sleeve is tightly propped against the inner cone expansion sleeve 3, the inner cone expansion sleeve 3 always keeps the outer expansion trend, the clamping stability of the inner cone expansion sleeve is enhanced, and the precision and quality of the subsequent processing of the gear are ensured.
The specific embodiments described herein are merely illustrative of the principles and functions of the present utility model, and are not meant to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present utility model shall be covered by the appended claims.
Claims (8)
1. The utility model provides a frock clamp for gear, includes base, outer cone dabber, interior cone expansion sleeve, pull rod, outer cone dabber is vertical to be fixed on the base, and interior cone expansion sleeve movable sleeve is established at outer cone dabber, and the pull rod wears to establish in the base and the upper end is connected interior cone expansion sleeve, its characterized in that: the middle part of the upper end surface of the outer cone mandrel is sunken to form an inner cavity; the outer cone mandrel is characterized in that a plurality of radial sliding holes communicated with the inner cavity are formed in the outer peripheral wall of the outer cone mandrel along the same circumferential line, a radial ejector rod which is used for tightly propping against the inner peripheral wall of the inner cone expansion sleeve is arranged in each radial sliding hole in a sliding mode, an axial push rod is arranged in the inner cavity in a penetrating mode along the axial direction, the axial push rod is in sliding fit with the radial ejector rod through an inclined surface structure, and a driving structure used for driving the axial push rod to axially move is connected to the axial push rod.
2. The work fixture for gears according to claim 1, wherein: and the inner end of the radial ejector rod is provided with an anti-drop bump for blocking the radial ejector rod from dropping out of the outer end of the radial sliding hole.
3. The work fixture for gears according to claim 2, wherein: the inclined surface structure comprises an inverted circular truncated cone block arranged at the lower end of the axial push rod, and the anti-drop convex block is provided with an inclined cambered surface which is matched with the outer circular truncated cone surface of the inverted circular truncated cone block.
4. A gear tooling fixture according to claim 3, wherein: the inner cavity bottom surface is convexly provided with a plurality of guide posts, a plurality of guide holes are correspondingly arranged in the inverted circular truncated cone block, and the guide posts are correspondingly arranged in the guide holes in a penetrating mode.
5. The work fixture for gears according to claim 2, wherein: and a reset spring is sleeved on the radial ejector rod and is abutted between the anti-falling lug and the radial sliding hole.
6. The work fixture for gears according to claim 1, wherein: the driving structure comprises a cover plate and a screwing screw rod, wherein the cover plate is arranged above the inner cavity in a covering mode, a threaded hole is formed in the center of the cover plate, the screwing screw rod is in threaded connection with the threaded hole, and the lower end of the screwing screw rod is rotatably sleeved outside the axial push rod.
7. The work fixture for gears according to claim 1, wherein: the radial sliding holes are at least three evenly distributed along the circumference.
8. The work fixture for gears according to claim 1, wherein: the outer end of the radial ejector rod is sleeved with a rubber sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465319.9U CN220782486U (en) | 2023-09-12 | 2023-09-12 | Frock clamp for gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465319.9U CN220782486U (en) | 2023-09-12 | 2023-09-12 | Frock clamp for gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220782486U true CN220782486U (en) | 2024-04-16 |
Family
ID=90658746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322465319.9U Active CN220782486U (en) | 2023-09-12 | 2023-09-12 | Frock clamp for gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220782486U (en) |
-
2023
- 2023-09-12 CN CN202322465319.9U patent/CN220782486U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |