CN219945785U - Liquid expansion mandrel clamp for grinding cam of harmonic speed reducer - Google Patents
Liquid expansion mandrel clamp for grinding cam of harmonic speed reducer Download PDFInfo
- Publication number
- CN219945785U CN219945785U CN202321230322.6U CN202321230322U CN219945785U CN 219945785 U CN219945785 U CN 219945785U CN 202321230322 U CN202321230322 U CN 202321230322U CN 219945785 U CN219945785 U CN 219945785U
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- expansion
- liquid
- liquid expansion
- cam
- mandrel
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- 239000007788 liquid Substances 0.000 title claims abstract description 65
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 16
- 238000003754 machining Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The utility model provides a liquid expansion mandrel clamp for grinding a cam of a harmonic speed reducer, which comprises a mandrel body and an expansion sleeve; the mandrel body is axially provided with a liquid expansion hole, the upper end and the lower end of the liquid expansion hole are respectively provided with an upper plunger and a lower plunger, the upper end of the mandrel body is provided with a press-fit part, the surface of the press-fit part is provided with a circle of liquid expansion groove, and the liquid expansion groove is communicated with the liquid expansion hole through an oil outlet; the expansion sleeve is fixedly sleeved on the press mounting part, and seals the upper end and the lower end of the liquid expansion groove; the cam to be processed is sleeved on the expansion sleeve. The beneficial effects of the utility model are as follows: the mandrel body of the liquid expansion mandrel clamp is internally provided with a liquid expansion hole, and the liquid expansion hole can be filled with oil to expand the expansion sleeve, so that a cam sleeved on the expansion sleeve can be positioned and clamped; the hydraulic expansion mandrel clamp can avoid machining errors caused by unstable size of the inner hole of the cam, so that the machining precision of the outer circle of the cam is improved; meanwhile, the liquid expansion mandrel clamp has the advantages of long service life, high safety performance, high working efficiency and good precision maintenance.
Description
Technical Field
The utility model relates to the technical field of tool clamp devices, in particular to a hydraulic expansion mandrel clamp for grinding a cam of a harmonic speed reducer.
Background
At present, when the cam of the harmonic speed reducer is used for processing and grinding an outer circular surface, a mounting hole of the cam is usually fixed on a conical mandrel and then is processed, and because an error exists in an inner hole of the cam, when the cam is sleeved on the conical mandrel, the cam is difficult to axially position and the processing precision is difficult to ensure. While some cylindrical mandrels are axially positioned through the step surfaces, radial positioning cannot be guaranteed, positioning consistency cannot be guaranteed for the high-precision workpieces such as cams, and mass production cannot be performed.
Disclosure of Invention
In view of the above, in order to facilitate the high-precision grinding of the cam and improve the positioning precision of the cam, the utility model provides a liquid expansion mandrel clamp for the grinding of the cam of a harmonic speed reducer, which comprises a mandrel body and an expansion sleeve;
the mandrel body is a cylinder, a liquid expansion hole penetrating through the mandrel body is axially formed in the mandrel body, an upper plunger and a lower plunger are respectively arranged at the upper end and the lower end of the liquid expansion hole, and the upper plunger and the lower plunger respectively seal the upper end and the lower end of the liquid expansion hole;
the upper end of the mandrel body is provided with a press-fitting part with a cylinder structure, the surface of the press-fitting part is provided with a circle of liquid expansion grooves, and the liquid expansion grooves are communicated with the liquid expansion holes through at least one oil outlet;
the expansion sleeve is fixedly sleeved on the press-fit part, and the upper end and the lower end of the liquid expansion groove are sealed by the expansion sleeve. And the cam to be processed is sleeved on the expansion sleeve.
Further, the hydraulic expansion device further comprises a compression nut, the upper end of the press mounting part is further provided with a nut mounting shaft with the diameter smaller than that of the press mounting part, the hydraulic expansion hole penetrates through the nut mounting shaft, the nut mounting shaft is provided with external threads, and the compression nut is connected to the nut mounting shaft through threads and compresses a cam to be machined.
Further, the lower end of the expansion sleeve is connected with a lower connecting ring, the upper end of the mandrel body is provided with a plurality of locking threaded holes, the lower connecting ring is provided with a plurality of locking screws, and the locking screws lock the lower connecting ring at the upper end of the mandrel body.
Further, an upper connecting ring is arranged at the upper end of the expansion sleeve, and the upper connecting ring is tightly attached to the upper end of the press-fit part.
Further, the upper end of the press fitting part is provided with an upper sealing ring, the side wall of the press fitting part is provided with a lower sealing ring, the upper sealing ring is positioned between the press fitting part and the upper connecting ring, the lower sealing ring is positioned between the expansion sleeve and the press fitting part, and the lower sealing ring is positioned below the liquid expansion groove.
Further, the upper end and the lower end of the liquid expansion hole are respectively provided with an internal thread, and the upper plunger and the lower plunger are respectively arranged in the liquid expansion hole in a threaded connection mode.
The liquid expansion mandrel clamp for grinding the cam of the harmonic speed reducer has the beneficial effects that: the hydraulic expansion mandrel clamp comprises a mandrel body and an expansion sleeve; the mandrel body is internally provided with a liquid expansion hole, and the liquid expansion hole can be used for expanding the expansion sleeve after oil is injected into the liquid expansion hole, so that a cam sleeved on the expansion sleeve can be positioned and clamped; the hydraulic expansion mandrel clamp is convenient and quick to mount and dismount; the hydraulic expansion mandrel clamp can avoid machining errors caused by unstable size of the inner hole of the cam, so that the machining precision of the outer circle of the cam is improved; meanwhile, the liquid expansion mandrel clamp has the advantages of long service life, high safety performance, high working efficiency and good precision maintenance.
Drawings
Fig. 1 is a cross-sectional view of a hydraulic expansion mandrel fixture for grinding a cam of a harmonic speed reducer according to an embodiment of the utility model.
Fig. 2 is a perspective view of the mandrel body 1, the press-fitting portion 2, and the nut mounting shaft 3 in fig. 1.
In the above figures: the mandrel comprises a mandrel body, a 11-liquid expansion hole, a 12-locking screw, a 2-press fitting part, a 21-liquid expansion groove, a 22-oil outlet, a 3-nut mounting shaft, a 4-expansion sleeve, a 41-upper connecting ring, a 42-lower connecting ring, a 5-compression nut, a 6-upper plunger, a 61-lower plunger and a 62-sealing ring.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 2, a hydraulic expansion mandrel fixture for grinding a cam of a harmonic speed reducer comprises a mandrel body, an expansion sleeve and a tightening nut 5.
The mandrel body 1 is a cylinder, the mandrel body 1 is axially provided with a liquid expansion hole 11 penetrating through the mandrel body, the upper end and the lower end of the liquid expansion hole 11 are respectively provided with an upper plunger 6 and a lower plunger 61, and the upper plunger and the lower plunger respectively seal the upper end and the lower end of the liquid expansion hole 11; the upper end of the mandrel body 1 is provided with a press-fitting part 2 with a cylinder structure, the surface of the press-fitting part 2 is provided with a circle of liquid expansion grooves 21, and the liquid expansion grooves 21 are communicated with the liquid expansion holes 11 through at least one oil outlet 22; in this embodiment, the number of the oil outlet holes 22 is 8, and all the oil outlet holes 22 are perpendicular to the liquid expansion holes 11. The upper end of the press-fitting part 2 is also provided with a nut mounting shaft 3 with the diameter smaller than that of the press-fitting part, and the mandrel body 1, the press-fitting part 2 and the nut mounting shaft 3 are connected into a whole.
The expansion sleeve 4 is fixedly sleeved on the press mounting part 2, the expansion sleeve 4 seals the upper end and the lower end of the liquid expansion groove 21, and the liquid expansion groove 21 and the inner wall of the expansion sleeve 4 form a liquid expansion cavity for containing oil. The cam to be processed is sleeved on the expansion sleeve 4. In the embodiment, the mandrel body 1 and the expansion sleeve are in transition fit, the expansion sleeve 4 is of a thin-wall structure, and the wall thickness of the expansion sleeve 4 is 2-3 mm. The liquid expansion hole 11 penetrates through the nut installation shaft 3, an external thread is arranged on the nut installation shaft 3, and the compression nut 5 is connected to the nut installation shaft 3 through threads and compresses a cam to be processed.
Further, the lower end of the expansion sleeve 4 is connected with a lower connecting ring 42, the upper end of the mandrel body 1 is provided with a plurality of locking threaded holes, the lower connecting ring 42 is provided with a plurality of locking screws 12, and the locking screws 12 lock the lower connecting ring 42 at the upper end of the mandrel body 1. In this embodiment, the locking screws 12 are socket head cap screws.
Further, an upper connecting ring 41 is arranged at the upper end of the expansion sleeve, and the upper connecting ring 41 is tightly attached to the upper end of the press-fitting part 3. The upper end of the press fitting part 3 is provided with an upper sealing ring, the side wall of the press fitting part 3 is provided with a lower sealing ring, the upper sealing ring is positioned between the press fitting part 3 and the upper connecting ring 41, the lower sealing ring is positioned between the expansion sleeve 4 and the press fitting part 3, and the lower sealing ring is positioned below the liquid expansion groove 21.
Further, the upper end and the lower end of the liquid expansion hole 11 are respectively provided with internal threads, the upper plunger 6 and the lower plunger 61 are respectively arranged in the liquid expansion hole 11 in a threaded connection mode, and the side walls of the upper plunger 6 and the lower plunger 61 are respectively provided with a sealing ring 62.
The clamping process of the hydraulic expansion mandrel clamp for grinding the cam of the harmonic speed reducer comprises the following steps: an upper sealing ring and a lower sealing ring are arranged on the press mounting part 2; the expansion sleeve 4 is installed on the press-fitting part 2 of the mandrel body through hot press fitting, and the expansion sleeve 4 is locked through the locking screw 12; the cam to be processed is sleeved on the expansion sleeve 4 and is compressed by the compression nut 5; screwing the upper plug 6 into the liquid expansion hole 11 from the upper end, temporarily not screwing the upper plug 6, injecting grease (oil) from the lower end of the liquid expansion hole 11, filling the whole set of liquid expansion hole 11, screwing the lower plug 61 from the lower end of the liquid expansion hole 11, screwing the short plug at the upper end, at this time, allowing the grease in the liquid expansion hole 11 to enter the liquid expansion groove 21 from the oil outlet, and extruding the expansion sleeve 4 left and right under the screwing pressure of the lower plug 61, so as to expand the expansion sleeve 4, thereby expanding and fastening the cam to be processed; and finally, the whole hydraulic expansion mandrel clamp is subjected to dark rotation and just is ground on a grinding machine to process the outer edge of the cam.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed utility model.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (6)
1. A liquid dabber anchor clamps that rise for harmonic speed reducer cam abrasive machining, its characterized in that: comprises a mandrel body and an expansion sleeve;
the mandrel body is a cylinder, a liquid expansion hole penetrating through the mandrel body is axially formed in the mandrel body, an upper plunger and a lower plunger are respectively arranged at the upper end and the lower end of the liquid expansion hole, and the upper plunger and the lower plunger respectively seal the upper end and the lower end of the liquid expansion hole;
the upper end of the mandrel body is provided with a press-fitting part with a cylinder structure, the surface of the press-fitting part is provided with a circle of liquid expansion grooves, and the liquid expansion grooves are communicated with the liquid expansion holes through at least one oil outlet;
the expansion sleeve is fixedly sleeved on the press mounting part, and the upper end and the lower end of the liquid expansion groove are sealed by the expansion sleeve; and the cam to be processed is sleeved on the expansion sleeve.
2. The hydraulic expansion mandrel fixture for grinding of a cam of a harmonic reducer according to claim 1, wherein: still include gland nut, pressure equipment portion upper end still is equipped with the nut installation axle that the diameter is less than pressure equipment portion diameter, liquid hole that rises runs through the nut installation axle, be equipped with the external screw thread on the nut installation axle, gland nut pass through threaded connection in on the nut installation axle, and compress tightly the cam of waiting to process.
3. The hydraulic expansion mandrel fixture for grinding of a cam of a harmonic reducer according to claim 1, wherein: the lower end of the expansion sleeve is connected with a lower connecting ring, the upper end of the mandrel body is provided with a plurality of locking threaded holes, the lower connecting ring is provided with a plurality of locking screws, and the locking screws lock the lower connecting ring at the upper end of the mandrel body.
4. A liquid expansion mandrel fixture for grinding of harmonic speed reducer cams according to claim 3, wherein: the upper end of the expansion sleeve is provided with an upper connecting ring, and the upper connecting ring is tightly attached to the upper end of the press-fit part.
5. A liquid expansion mandrel fixture for grinding of harmonic speed reducer cams according to claim 3, wherein: the upper end of the press fitting part is provided with an upper sealing ring, the side wall of the press fitting part is provided with a lower sealing ring, the upper sealing ring is positioned between the press fitting part and the upper connecting ring, the lower sealing ring is positioned between the expansion sleeve and the press fitting part, and the lower sealing ring is positioned below the liquid expansion groove.
6. The hydraulic expansion mandrel fixture for grinding of a cam of a harmonic reducer according to claim 1, wherein: the upper end and the lower end of the liquid expansion hole are respectively provided with internal threads, and the upper plunger and the lower plunger are respectively arranged in the liquid expansion hole in a threaded connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321230322.6U CN219945785U (en) | 2023-05-19 | 2023-05-19 | Liquid expansion mandrel clamp for grinding cam of harmonic speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321230322.6U CN219945785U (en) | 2023-05-19 | 2023-05-19 | Liquid expansion mandrel clamp for grinding cam of harmonic speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219945785U true CN219945785U (en) | 2023-11-03 |
Family
ID=88541394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321230322.6U Active CN219945785U (en) | 2023-05-19 | 2023-05-19 | Liquid expansion mandrel clamp for grinding cam of harmonic speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219945785U (en) |
-
2023
- 2023-05-19 CN CN202321230322.6U patent/CN219945785U/en active Active
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