CN219987124U - High-precision quick-assembly grinding gear pump internal gear clamp - Google Patents
High-precision quick-assembly grinding gear pump internal gear clamp Download PDFInfo
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- CN219987124U CN219987124U CN202320906719.6U CN202320906719U CN219987124U CN 219987124 U CN219987124 U CN 219987124U CN 202320906719 U CN202320906719 U CN 202320906719U CN 219987124 U CN219987124 U CN 219987124U
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Abstract
The utility model relates to a high-precision quick-assembly grinding gear pump internal gear clamp which comprises a taper positioning seat connecting disc, an internal gear positioning seat and a positioning taper mandrel, wherein the left end of the taper positioning seat connecting disc is connected with a grinding machine spindle, a positioning sleeve seat is formed at the right end of the taper positioning seat connecting disc, a large cylindrical hole and a small cylindrical hole which are distributed in a stepped manner are formed in the positioning sleeve seat, the small cylindrical hole is provided with internal threads, the external part of the positioning sleeve seat is sleeved with the positioning internal gear positioning seat, the left end of the internal gear positioning seat is fixed with the taper positioning seat connecting disc, an internal conical hole is formed in the end part of the right end protruding the positioning sleeve seat, and the external diameter of the internal gear positioning seat is provided with positioning teeth meshed with local teeth of an internal gear of a gear pump; the positioning taper mandrel is provided with an external thread section, a cylindrical section and a conical section, and the end surface of the conical section forms a screwing operation end; the inner conical hole of the inner gear positioning seat is tensioned through the conical section of the positioning conical mandrel, so that the positioning teeth of the inner gear positioning seat are tensioned on the outer gear of the gear pump, quick clamping and positioning are realized, and grinding processing is facilitated.
Description
Technical Field
The utility model relates to the field of machining equipment, in particular to a high-precision quick-assembly grinding gear pump internal gear clamp.
Background
The existing gear pump mainly comprises a pump body, an external gear, an internal gear, a small crescent, a large crescent, an oil distribution disc and other structures. When the double-sided oil distribution disc works, the pressure change of the cavity formed by the high-speed meshing rotation of the outer gear and the inner gear is mainly relied on, and the double-sided oil distribution disc is contacted with the inner gear in a four-sided gapless manner, so that a high-pressure sealed working cavity is contained, and the pressure increment in the sealed volume of the working cavity is used for realizing high-pressure oil discharge and vacuum low-pressure oil absorption. In order to realize reliable work of the pump body, the precision degree of machining of each part directly determines the assembly precision among the parts, the higher the precision is, the more reliable the sealing among the parts is, the smaller the influence of friction and the like is, so that the high-temperature resistance is good, the noise is smaller, and the service life is longer. The external diameter and the end face precision of the gear pump internal gear are one of the main factors influencing the working performance, and how to ensure the external diameter and the end face precision of the internal gear is always a difficult point in the prior art, and the main reason is that the clamp adopted in the grinding process of the internal gear is generally used for only partially grinding the internal gear by one-time clamping, and cannot realize all grinding processing of the surface to be processed by one-time clamping. Therefore, the fixture can only be used for clamping for a plurality of times, and the processing position mode is changed until the grinding operation of all the surfaces to be processed is completed. However, in such an operation, the clamping is often not in place or is not in deviation due to repeated clamping, so that the machining precision is affected, and the precision of the size, the deflection and the concentricity of the internal gear is difficult to ensure. For this reason, improvements are required to be made to existing machining jigs.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide the high-precision fast-assembling grinding gear pump internal gear clamp in the field, so that the technical problem that the existing similar internal gear clamp is difficult to realize one-time clamping multi-surface machining, and the machining precision and quality of an internal gear are affected is solved. The aim is achieved by the following technical scheme.
The fixture comprises a taper positioning seat connecting disc, an internal gear positioning seat and a positioning taper mandrel, wherein the left end of the taper positioning seat connecting disc is connected with a grinding machine main shaft, and the internal gear positioning seat is used for positioning and connecting an internal gear of the gear pump; the gear positioning device is characterized in that a positioning sleeve seat coaxial with a main shaft of the grinding machine is formed at the right end of a connecting disc of the taper positioning seat, a large cylindrical hole and a small cylindrical hole which are coaxially distributed in a step mode are formed in the positioning sleeve seat, internal threads are arranged in the small cylindrical hole, the inner gear positioning seat is sleeved and positioned outside the positioning sleeve seat, the left end of the inner gear positioning seat is fixed with a connecting disc of the taper positioning seat, the right end of the inner gear positioning seat protrudes out of the end part of the positioning sleeve seat, an inner conical hole is formed in the protruding end, the small hole end of the inner conical hole is opposite to the large cylindrical hole of the positioning sleeve seat, the caliber of the small hole end is larger than that of the large cylindrical hole, positioning teeth meshed with partial teeth of an inner gear are arranged on the outer diameter of the inner gear positioning seat, and the positioning teeth are distributed in a central symmetry mode relative to the gear positioning seat of the gear pump; the positioning taper mandrel is coaxial with the main shaft of the grinding machine, at least three sections with the same axis are arranged, the sections are respectively external thread sections in threaded connection with the small cylindrical holes of the positioning sleeve seat, the cylindrical sections are in sliding fit with the large cylindrical holes of the positioning sleeve seat, the conical sections are in guiding tensioning with the inner conical holes of the inner gear positioning seat, and the end faces of the conical sections form screwing operation ends; when the gear pump inner gear is meshed and assembled with the positioning teeth outside the inner gear positioning seat, and when the external thread section of the positioning taper mandrel is locked with the small cylindrical hole thread of the positioning sleeve seat, the conical section of the positioning taper mandrel is tensioned on the inner conical hole of the inner gear positioning seat and forms expansion deformation, and the gear pump inner gear forms clamping positioning under the action of the tensioning action of the positioning teeth of the inner gear positioning seat. Through the structure, the gear positioning seat is rigidly deformed, so that the gear of the gear pump and the clamp are rapidly clamped and positioned, the outer diameter surface and the two side end surfaces of the gear pump can be ground by one-time clamping and positioning, the complex process of clamping for multiple times is avoided, the processing efficiency is improved, and the processing precision and quality are ensured.
The positioning teeth of the internal gear positioning seat are adjacent two groups, and at least four groups are arranged. Through this structure, realize with the gear pump internal gear reliable location.
And the external thread section of the positioning taper mandrel and the small cylindrical hole of the connecting disc of the taper positioning seat are kept to be self-locked when rotating along with the main shaft of the grinding machine. Through this structure, guarantee abrasive machining rotation operating mode's stability, location tapering dabber is difficult for taking off.
The disc surface of the taper positioning seat connecting disc is provided with screw holes and connecting holes which are distributed in an annular mode, the connecting holes are fixedly locked through bolts between the connecting holes and the main shaft of the grinding machine, and the screw holes are fixedly locked through bolts between the screw holes and the annular seat at the left end of the inner gear positioning seat. By this structure, reliable fixation of the jig is achieved.
The screwing operation end of the positioning taper mandrel is a bolt head. Through this structure, the automatic locking operation of location tapering dabber is realized to current pneumatic means of convenient adaptation.
The positioning taper mandrel is split into two parts, one part is a bolt shaft with the external thread section, the other part is a cylindrical section and a conical section which are connected into a whole, and the cylindrical section and the conical section are provided with perforations penetrating through the bolt shaft. Through this structure, convenient maintenance changes, reduces cost of maintenance.
The gear pump inner gear outer diameter surface grinding device is simple in integral clamping operation, reliable in positioning and clamping, capable of realizing grinding machining of the gear pump inner diameter surface and two side surfaces at one time, and capable of effectively guaranteeing accuracy of position degree, perpendicularity, concentricity and middle warp deflection degree of the inner diameter and the two side end surfaces of the outer diameter. The clamping fixture is suitable for being used as a clamping fixture of an internal gear of a gear pump or improvement of similar products.
Drawings
FIG. 1 is a schematic cross-sectional view of a split structure of the present utility model.
Fig. 2 is a schematic cross-sectional view of the assembled structure of fig. 1.
FIG. 3 is a schematic cross-sectional view of the internal gear positioning seat of the present utility model, with A-A being taken in cross-section.
Fig. 4 is a schematic view of the cross-sectional A-A structure of fig. 3.
Fig. 5 is a schematic diagram of the internal gear positioning seat and internal gear clamping positioning structure of the gear pump.
The serial numbers and names in the figures are: 1. the device comprises a taper positioning seat connecting disc, 101, a positioning sleeve seat, 102, a small cylindrical hole, 103, a large cylindrical hole, 2, a grinding machine spindle, 3, an inner gear positioning seat, 301, an annular seat, 302, positioning teeth, 303, an inner conical hole, 4, a positioning taper spindle, 401, an external thread section, 402, a cylindrical section, 403, a conical section, 404, a screwing operation end, 5 and an inner gear of a gear pump.
Description of the embodiments
The utility model will now be further described with reference to the accompanying drawings.
As shown in fig. 1-5, the high-precision quick-assembly grinding gear pump internal gear clamp comprises a taper positioning seat connecting disc 1, an internal gear positioning seat 3 and a positioning taper mandrel 4, and has the following specific structure: the disc surface of the taper positioning seat connecting disc is provided with screw holes and connecting holes which are distributed in an annular mode, the connecting holes at the left end of the disc surface are locked and fixed with the grinding machine main shaft 2 through bolts, the right end of the disc surface is provided with a positioning sleeve seat 101 coaxial with the grinding machine main shaft, the inside of the positioning sleeve seat is provided with large cylindrical holes 103 and small cylindrical holes 102 which are distributed in a stepped mode and coaxial with the positioning sleeve seat, and the small cylindrical holes are provided with internal threads. The outside of the positioning sleeve seat is sleeved with the internal gear positioning seat, the left end of the internal gear positioning seat forms an annular seat 301, the annular seat is locked and fixed with a screw hole of the taper positioning seat connecting disc through a bolt, the right end of the internal gear positioning seat protrudes out of the end of the positioning sleeve seat, an inner conical hole 303 is formed in the protruding end, the small hole end of the inner conical hole is opposite to a large cylindrical hole of the positioning sleeve seat, and the caliber of the small hole end is larger than that of the large cylindrical hole. The external diameter of the internal gear positioning seat is provided with positioning teeth 302 meshed with partial teeth of the internal gear of the gear pump, the positioning teeth are distributed in central symmetry relative to the internal gear positioning seat, and a grinding gap is reserved between the positioning teeth and the annular seat 301, as shown in fig. 4, the number of the positioning teeth is two, and four groups are arranged in total.
The positioning taper mandrel 4 is coaxial with the grinding machine spindle 2, and is provided with three coaxial sections, namely an external thread section 401 in threaded connection with the small cylindrical hole 102 of the positioning sleeve seat 101, a cylindrical section 402 in sliding fit with the large cylindrical hole 103 of the positioning sleeve seat, a conical section 403 in guiding tensioning with the inner conical hole 303 of the inner gear positioning seat 3, a screwing operation end 404 formed on the end surface of the conical section, and a bolt head at the screwing operation end. When the gear pump internal gear 5 is meshed with the positioning teeth 302 assembled outside the internal gear positioning seat, and when the external thread section of the positioning taper mandrel is locked with the small cylindrical hole thread of the positioning sleeve seat, the conical section of the positioning taper mandrel expands to tightly expand the internal conical hole of the internal gear positioning seat, and the gear pump internal gear forms clamping positioning under the action of the expansion of the positioning teeth of the internal gear positioning seat.
The external thread section 401 of the positioning taper mandrel 4 and the small cylindrical hole 102 of the taper positioning seat connecting disc 1 keep self-locking when rotating along with the main shaft 2 of the grinding machine. Therefore, when the positioning taper mandrel rotates along with the main shaft of the grinding machine, the positioning taper mandrel is not easy to loose.
In order to further facilitate the maintenance and replacement of the positioning taper mandrel 4 after being worn, the positioning taper mandrel can be split into two parts, wherein one part is a bolt shaft with an external thread section 401, the other part is a cylindrical section 402 and a conical section 403 which are connected into a whole, and the cylindrical section and the conical section are provided with perforations penetrating through the bolt shaft.
The application method of the gear pump internal gear clamp comprises the following steps: firstly, connecting and fixing a taper positioning seat connecting disc 1 with a grinder spindle 2, sleeving an internal gear positioning seat 3 into a positioning sleeve seat 101 of the taper positioning seat connecting disc, meshing and assembling an internal gear 5 of a gear pump on positioning teeth 302 outside the internal gear positioning seat after sleeving, finally matching a positioning taper mandrel 4 with an internal taper hole 303 in the internal gear positioning seat and a cylindrical hole 302 in a taper positioning seat cheap disc through a pneumatic device, locking an external thread section 401 of the positioning taper mandrel with a small cylindrical hole 102 in the taper positioning seat connecting disc, guiding and expanding the taper section 403 of the positioning taper mandrel with the internal taper hole of the internal gear positioning seat, and tensioning the internal gear pump by virtue of the positioning teeth outside the internal gear positioning seat, so that clamping operation of the internal gear pump by the clamp is realized, and then starting the grinder spindle to grind the external diameter surface and two side end surfaces of the internal gear pump.
The above description is intended to illustrate the technical means of the present utility model, and not to limit the technical scope of the present utility model. Obvious modifications or substitutions by one with ordinary skill in the art are within the scope of the present utility model as defined by the appended claims.
Claims (6)
1. The high-precision quick-assembly grinding gear pump internal gear clamp comprises a taper positioning seat connecting disc (1), an internal gear positioning seat (3) and a positioning taper mandrel (4), wherein the left end of the taper positioning seat connecting disc is connected with a grinding machine main shaft (2), and the internal gear positioning seat is used for positioning and connecting an internal gear (5) of the gear pump; the grinding machine is characterized in that a locating sleeve seat (101) coaxial with a grinding machine spindle (2) is formed at the right end of a taper locating seat connecting disc (1), a large cylindrical hole (103) and a small cylindrical hole (102) which are coaxially distributed in a step mode are formed in the locating sleeve seat, internal threads are arranged in the small cylindrical hole, the internal gear locating seat (3) is sleeved and located outside the locating sleeve seat, the left end of the internal gear locating seat is fixed with the taper locating seat connecting disc, the right end of the internal gear locating seat protrudes out of the end of the locating sleeve seat, an internal conical hole (303) is formed in the protruding end, the small hole end of the internal conical hole is opposite to the large cylindrical hole of the locating sleeve seat, the caliber of the small hole end is larger than that of the large cylindrical hole, locating teeth (302) meshed with local teeth of an internal gear (5) of the gear are arranged on the outer diameter of the internal gear locating seat, the locating teeth are symmetrically distributed relative to the center of the internal gear locating seat, and gaps for grinding machining are reserved between the locating teeth and the left end of the locating seat; the positioning taper mandrel (4) is coaxial with the grinding machine spindle (2), and is provided with at least three sections coaxial with each other, namely an external thread section (401) in threaded connection with a small cylindrical hole of the positioning sleeve seat, a cylindrical section (402) in sliding fit with a large cylindrical hole of the positioning sleeve seat, a conical section (403) in guiding tensioning with an inner conical hole of the inner gear positioning seat, and a screwing operation end (404) formed by the end surfaces of the conical sections; when the gear pump inner gear is meshed and assembled with the positioning teeth outside the inner gear positioning seat, and when the external thread section of the positioning taper mandrel is locked with the small cylindrical hole thread of the positioning sleeve seat, the conical section of the positioning taper mandrel is tensioned on the inner conical hole of the inner gear positioning seat and forms expansion deformation, and the gear pump inner gear forms clamping positioning under the action of the tensioning action of the positioning teeth of the inner gear positioning seat.
2. The high-precision quick-assembly grinding gear pump internal gear clamp according to claim 1, wherein the number of the positioning teeth (302) of the internal gear positioning seat (3) is two adjacent groups, and at least four groups are arranged.
3. The high-precision quick-assembly grinding gear pump internal gear clamp according to claim 1, which is characterized in that the external thread section (401) of the positioning taper mandrel (4) and the small cylindrical hole (102) of the taper positioning seat connecting disc (1) keep self-locking when rotating along with the grinding machine spindle (2).
4. The high-precision fast-assembling grinding gear pump internal gear clamp according to claim 1, wherein the disc surface of the taper positioning seat connecting disc (1) is provided with annularly distributed screw holes and connecting holes, the connecting holes are locked and fixed with a grinding machine spindle (2) through bolts, and the screw holes are locked and fixed with an annular seat (301) at the left end of the internal gear positioning seat (3) through bolts.
5. The high-precision quick-assembly grinding gear pump internal gear clamp according to claim 1, wherein the screwing operation end (404) of the positioning taper mandrel (4) is a bolt head.
6. The high-precision quick-assembly grinding gear pump internal gear clamp according to claim 1, wherein the positioning taper mandrel (4) is split into two parts, one part is a bolt shaft with the external thread section (401), the other part is a cylindrical section (402) and a taper section (403) which are connected into a whole, and the cylindrical section and the taper section are provided with perforations penetrating through the bolt shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320906719.6U CN219987124U (en) | 2023-04-19 | 2023-04-19 | High-precision quick-assembly grinding gear pump internal gear clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320906719.6U CN219987124U (en) | 2023-04-19 | 2023-04-19 | High-precision quick-assembly grinding gear pump internal gear clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219987124U true CN219987124U (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320906719.6U Active CN219987124U (en) | 2023-04-19 | 2023-04-19 | High-precision quick-assembly grinding gear pump internal gear clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219987124U (en) |
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2023
- 2023-04-19 CN CN202320906719.6U patent/CN219987124U/en active Active
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