CN217254691U - High-precision inner gear pitch circle inner tensioning rubber expansion sleeve and gear clamp - Google Patents
High-precision inner gear pitch circle inner tensioning rubber expansion sleeve and gear clamp Download PDFInfo
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- CN217254691U CN217254691U CN202221138262.0U CN202221138262U CN217254691U CN 217254691 U CN217254691 U CN 217254691U CN 202221138262 U CN202221138262 U CN 202221138262U CN 217254691 U CN217254691 U CN 217254691U
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Abstract
The utility model discloses a tight rubber that rises in high accuracy internal gear pitch circle cover and gear anchor clamps that rise, tight rubber that rises in this internal gear pitch circle cover mainly by at least three metal grip block that is the circumference and bond the elastic rubber piece between adjacent grip block and enclose to close and form, it is provided with the central through-hole that is used for installing the tapering body to rise the cover middle part, set up in the central through-hole with tapering body outer wall complex conical surface, the surface of metal grip block distributes along circumference has the location tooth that is used for with the internal toothing of gear workpiece. The expansion sleeve is simple in structure, easy to operate, large in clamping force, more resistant to fatigue, more stable in cutting and higher in repeated clamping precision.
Description
Technical Field
The utility model relates to an anchor clamps technical field especially relates to a tight rubber that rises in high accuracy internal gear pitch circle rises and overlaps and gear clamp.
Background
With the development and progress of scientific and technical technology, automatic production is more and more applied to the field of mechanical machining, the automatic production has higher requirements on the reliability, service life and equipment precision of equipment, and common chucks and chucks cannot meet the requirements of the current mechanical machining.
At present, an elastic expansion sleeve (as disclosed in the patent with publication number CN 202628697U) as shown in fig. 1, which is used in an existing tool clamp, includes a shaft sleeve, axial adjustment grooves 4 are distributed on a side wall of the shaft sleeve, a circular buffer hole communicated with the axial adjustment grooves 4 is arranged between one end of the axial adjustment grooves 4 and the shaft sleeve 1, the axial adjustment grooves 4 include an upper end face axial adjustment groove 6 and a lower end face axial adjustment groove 7, the upper end face axial adjustment groove 6 is communicated with an upper end face of the shaft sleeve 1, and the lower end face axial adjustment groove 7 is communicated with a lower end face of the shaft sleeve 1.
In practical application, the expansion sleeve has a longer structure and a longer waist part in order to meet the requirements of sufficient elastic deformation and clamping force; therefore, when the expansion sleeve is mounted on a clamp for use, the expansion sleeve enables the main shaft to bear larger bearing force, the centrifugal force of cutting is easily larger in the rotating process, the cutting is more easily unstable, and the fatigue resistance is not strong; in addition, because the outer wall of the expansion sleeve is smooth, when the outer wall expands the inner hole of the gear workpiece, the contact surface between the expansion sleeve and the workpiece is small, the clamping force on the workpiece is not strong enough, and the positioning accuracy is not high; after the clamp is repeatedly used, the precision of the clamp can be influenced to a certain extent, so that the precision of repeated clamping and using is not high.
Therefore, there is a need for a corresponding improved design of the existing riser structure.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a tight rubber that rises in high accuracy internal gear pitch circle rises cover and gear clamp who uses thereof, the structural feature of the cover that should rise makes it reduce the bearing capacity of main shaft to the cover that should rise is more antifatigue, the cutting is more stable, the repeated clamping precision is higher.
The utility model provides a following technical scheme:
the utility model provides a tight rubber that rises in high accuracy internal gear pitch circle rises cover, its mainly by at least three metal grip block that is the circumference and bond the elastic rubber piece between adjacent grip block and enclose to close and form, it runs through in the middle part of the cover that rises and is provided with the central through-hole that is used for installing the tapering body, set up in the central through-hole with tapering body outer wall complex conical surface, the surface of metal grip block distribute along circumference be used for with gear workpiece's internal toothing's location tooth.
Preferably, in the internal gear pitch circle internal tensioning rubber expansion sleeve, the number of the metal clamping blocks is six blocks with the same size, and the metal clamping blocks are uniformly and symmetrically distributed.
Preferably, in the internal gear pitch circle internal expanding rubber expansion sleeve, the lower end of the expansion sleeve extends out of a connecting part, an anti-rotation hole for installing a fastener is arranged on the side surface of a metal clamping block of the connecting part in a penetrating manner, the width of the anti-rotation hole is the same as the outer diameter of the fastener, and the height of the anti-rotation hole is larger than the outer diameter of the fastener.
In an optional embodiment, in the internal gear pitch circle internal tensioning rubber expansion sleeve, the middle lower part of the inner wall of the central through hole is provided with a taper hole, and the inner diameter of the taper hole gradually expands downwards; the top of the central through hole is provided with a pull rod positioning hole for the pull rod to penetrate through, and the depth of the pull rod positioning hole is not less than the stroke of the expansion sleeve.
In another optional embodiment, in the internal gear pitch circle internal tensioning rubber expansion sleeve, the middle lower part of the inner wall of the central through hole is provided with a taper hole, and the inner diameter of the taper hole gradually expands downwards; the top of the central through hole is provided with a pull rod positioning hole for the pull rod to penetrate through, the inner wall below the pull rod positioning hole is radially recessed to form a clearance hole, and a clamping block or a clamping ring used for being matched with the clamping groove of the pull rod is formed on the inner wall between the clearance hole and the pull rod positioning hole.
A gear clamp comprises a taper body, an internal gear pitch circle internal tensioning rubber expansion sleeve and a pull rod, wherein the internal gear pitch circle internal tensioning rubber expansion sleeve is installed on the taper body, the pull rod penetrates through the expansion sleeve and the taper body, and the lower end of the head of the pull rod is clamped with the top of a central through hole.
The utility model provides an internal gear pitch circle internal tension rubber rises cover and gear anchor clamps and has following beneficial effect:
1. the expansion sleeve has the advantages of simple structure, easy operation and large clamping force, and the tension force is 2-3 times that of the traditional all-steel slotted expansion sleeve. The positioning teeth on the outer wall are meshed with the inner teeth of the inner hole of the gear workpiece in the axial direction, so that the workpiece is tensioned and positioned, the contact area between the expansion sleeve and the inner hole of the workpiece is greatly increased in the tensioning mode, the clamping force of the expansion sleeve is greatly increased, the workpiece is positioned more accurately, and the coaxiality of the workpiece is higher; and no matter the size of the workpiece, the clamping force is always distributed on the acting surface of the workpiece in parallel and uniformly, so that the machining precision of the workpiece is improved.
2. Compare current cover that rises, the cover that rises of this application can also play not receive the influence that high temperature, coolant liquid and iron fillings intervene, keeps enough flexibility during its life. The high-precision inner gear pitch circle internal expanding rubber expansion sleeve is high in precision, high in hardness, large in feeding gap and more suitable for automatic production and batch processing.
3. The expansion sleeve gets rid of the problems that the service life of the all-steel expansion sleeve is short, the clamping is unstable, the jaw replacement adjustment time of a traditional chuck used in a matched mode is long, and the production efficiency of small products in multiple batches is low, shortens the production change time of workers, solves the problems that the production cost of customers is reduced in the traditional mode, improves the machining precision, enables the rotating jumping precision to be less than or equal to 10u, enables the expansion range to be +/-0.5 mm, enables the expansion to be firmer, and facilitates the realization of automatic production.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic perspective view of an internal gear pitch circle internal tensioning rubber expansion sleeve in embodiment 1;
FIG. 3 is a schematic top view showing the internal gear pitch circle internal tensioning rubber expansion sleeve of embodiment 1;
FIG. 4 is a schematic sectional view showing the internal gear pitch circle internal expanding rubber expanding sleeve of embodiment 1;
FIG. 5 is a schematic view of the working state of the internal gear pitch circle internal tension rubber expansion sleeve in embodiment 1, and is also a schematic view of the top structure of the gear clamp;
FIG. 6 is a schematic structural view of a drawbar with a slot according to embodiment 1;
FIG. 7 is a schematic sectional view showing a pitch circle of an internal gear of an embodiment 2;
FIG. 8 is a schematic view showing an operating state of an internal gear pitch circle internal tensioning rubber expansion sleeve of embodiment 2;
wherein the reference numerals are as follows:
the device comprises a metal clamping block 1, an elastic rubber block 2, a central through hole 3, a taper hole 31, a pull rod positioning hole 32, a clearance hole 33, positioning teeth 11, a connecting part 4, an anti-rotation hole 5, a clamping block or clamping ring 6, a pull rod 7 and a taper body 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. The directional or positional relationships indicated as used herein are those based on the drawings and are intended to facilitate the description of the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 2-4, the embodiment provides a high-precision internal gear pitch circle internal expanding rubber expansion sleeve, which is mainly formed by enclosing at least three circumferentially distributed metal clamping blocks 1 and elastic rubber blocks 2 bonded between adjacent clamping blocks, wherein a central through hole 3 for installing a taper body is arranged in the middle of the expansion sleeve in a penetrating manner, a conical surface attached to the outer wall of the conical surface of the taper body is arranged in the central through hole, and positioning teeth 11 used for being meshed with internal teeth of a gear workpiece are distributed on the outer surface of each metal clamping block along the circumferential direction. In the expansion sleeve of this embodiment, the number of metal clamping blocks is six blocks with the same size, and is even and symmetric distribution.
When the expanding sleeve is used, as shown in fig. 5, the expanding sleeve is installed on a conical column of a conical body 8, a pull rod 7 is inserted into the conical body from the top of a central through hole of the expanding sleeve and penetrates through the conical body, the bottom of the pull rod is connected with a main shaft of a machine tool, and then a gear workpiece is installed on the expanding sleeve to be preliminarily positioned. When the machine tool works, when the bottom of the pull rod 7 is subjected to an axial pull-down acting force from the main shaft, the pull rod 7 drives the inner gear pitch circle inner expansion rubber expansion sleeve to move downwards to be tightly attached to the conical outer wall of the conical body, and in the process, the expansion sleeve radially expands until the positioning teeth 11 on the outer wall of the expansion sleeve are clamped into tooth grooves of an inner hole of a workpiece under the action of a radial outward pressure from the conical body, so that the function of expanding the workpiece is realized. The back-pull type installation and tensioning mode is adopted. Therefore, the expansion sleeve is more suitable for positioning the gear workpiece with the tooth-shaped inner hole, and is convenient for processing the gear teeth on the appearance of the gear workpiece.
The expansion sleeve realizes the expansion positioning of the workpiece by the axial meshing of the positioning teeth on the outer wall and the inner teeth of the inner hole of the gear workpiece, the expansion mode greatly improves the contact area between the expansion sleeve and the inner hole of the workpiece, so that the clamping force of the expansion sleeve is increased to 2-3 times of that of a common clamp, the workpiece is positioned more accurately, and the coaxiality is higher; based on the tensioning characteristic, no matter the size of the workpiece, the clamping force is always distributed on the acting surface of the workpiece in parallel and evenly, and the processing precision of the workpiece is improved.
Preferably, in order to better position the expansion sleeve on the clamp and avoid circumferential deflection of the expansion sleeve in the working process, the following settings are carried out: as shown in fig. 1 and 4, the lower end of the expansion sleeve extends out of a connecting part 4, an anti-rotation hole 5 is arranged on the side surface of the metal clamping block of the connecting part in a penetrating mode, the width of the anti-rotation hole is the same as the outer diameter of the fastener, and the height of the anti-rotation hole is larger than the outer diameter of the fastener. Preferably, the anti-rotation holes 5 are symmetrically distributed. In this embodiment, the positioning teeth 11 are not distributed on the connecting portion.
The during operation, the accessible fastener (like the bolt) is connected it with anchor clamps, because the width that prevents the hole is the same with the external diameter of fastener, prevents highly being greater than the external diameter of fastener in hole, consequently, the cover that rises can carry out axial motion in certain extent, guarantees the demand of work, and simultaneously, the cover that rises can not rotate, reaches the effect of preventing changeing.
In this embodiment, in order to match the pull rod with the slot 73 as shown in fig. 6, the expansion sleeve is configured as follows:
the pull rod 7 comprises a head part 71 for abutting against the upper end surface of the expansion sleeve from the outside and a rod part 72 coaxially arranged at the bottom of the head part, and an annular clamping groove 73 is arranged on the outer side of the base part of the head part along the circumferential direction.
Correspondingly, as shown in fig. 4, the middle-lower part of the inner wall of the central through hole 3 of the internal gear pitch circle internal tensioning rubber expansion sleeve is provided with a taper hole 31 with the inner diameter gradually expanding downwards; the top of the central through hole is provided with a pull rod positioning hole 32 for the pull rod 73 to penetrate through, the inner wall below the pull rod positioning hole is radially sunken to form a clearance hole 33, the inner wall between the clearance hole and the pull rod positioning hole 32 forms a clamping ring 6 structure, and the clamping ring is in clamping fit with the clamping groove 73 of the pull rod 7, so that the connection between the reinforcing pull rod and the expansion sleeve is realized.
The embodiment also provides a gear clamp, which comprises a taper body 8, an internal gear pitch circle internal tensioning rubber expansion sleeve arranged on the taper body and a pull rod 7 penetrating through the expansion sleeve and the taper body, wherein the lower end of the head of the pull rod is clamped with the top of the central through hole. In addition, the gear clamp also comprises other conventional structures, and the description is omitted.
Example 2
The embodiment provides an internal gear pitch circle internal tensioning rubber expansion sleeve, the structure of which is basically the same as that of the embodiment 1, and the internal gear pitch circle internal tensioning rubber expansion sleeve is used for matching with a common pull rod 70 without a clamping groove, and the difference structure is as follows:
as shown in fig. 7, a taper hole 31 is formed in the middle-lower portion of the inner wall of the central through hole 3, and the inner diameter of the taper hole gradually expands downward; the top of the central through hole is provided with a pull rod positioning hole 32 for the pull rod to penetrate through, and the depth of the pull rod positioning hole is not less than the stroke of the expansion sleeve and is used for space avoidance. The other structure is the same as embodiment 1.
As shown in fig. 8, the present embodiment also provides a gear jig comprising a taper body 8, an expansion sleeve of the present embodiment mounted on the taper body, and a pull rod 70 penetrating the expansion sleeve and the taper body. In addition, the gear clamp also comprises other conventional structures, and the description is omitted.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept, and all such alterations and modifications shall fall within the scope of the appended claims.
Claims (6)
1. The utility model provides a tight rubber that rises in high accuracy internal gear pitch circle rises cover which characterized in that, mainly by at least three metal grip block (1) that are the circumference and bond elasticity rubber block (2) between adjacent metal grip block and enclose to close and form, it runs through central through hole (3) that are used for installing the tapering body to rise the cover middle part, set up in the central through hole with tapering body outer wall complex conical surface, the surface of metal grip block along circumference distribute be used for with gear workpiece's internal tooth meshing's location tooth (11).
2. The high-precision internal gear pitch circle internal tension rubber expansion sleeve as claimed in claim 1, wherein the number of the metal clamping blocks is six with the same size, and the metal clamping blocks are uniformly and symmetrically distributed.
3. The high-precision internal gear pitch circle internal tension rubber expansion sleeve as claimed in claim 1, wherein a connecting part (4) extends from the lower end of the expansion sleeve, an anti-rotation hole (5) for installing a fastener is arranged on the side surface of a metal clamping block of the connecting part in a penetrating manner, the width of the anti-rotation hole is the same as the outer diameter of the fastener, and the height of the anti-rotation hole is larger than the outer diameter of the fastener.
4. The high-precision internal gear pitch circle internal tension rubber expansion sleeve as claimed in claim 3, wherein the middle lower part of the inner wall of the central through hole (3) is provided with a taper hole (31), and the inner diameter of the taper hole is gradually enlarged downwards; the top of the central through hole is provided with a pull rod positioning hole (32) for the pull rod to penetrate through, and the depth of the pull rod positioning hole is not less than the stroke of the expansion sleeve.
5. The high-precision internal gear pitch circle internal tension rubber expansion sleeve as claimed in claim 3, wherein the middle lower part of the inner wall of the central through hole (3) is provided with a taper hole (31), and the inner diameter of the taper hole is gradually enlarged downwards; the top of the central through hole is provided with a pull rod positioning hole (32) for the pull rod to penetrate through, the inner wall below the pull rod positioning hole is radially recessed to form a clearance hole (33), and a clamping block or a clamping ring (6) used for being matched with a clamping groove (73) of the pull rod (7) is formed on the inner wall between the clearance hole and the pull rod positioning hole.
6. A gear clamp is characterized by comprising a taper body (8), an internal gear pitch circle internal tensioning rubber expansion sleeve installed on the taper body and according to any one of claims 1-5, and a pull rod (7) penetrating through the expansion sleeve and the taper body, wherein the lower end of the head of the pull rod is clamped with the top of a central through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221138262.0U CN217254691U (en) | 2022-05-12 | 2022-05-12 | High-precision inner gear pitch circle inner tensioning rubber expansion sleeve and gear clamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221138262.0U CN217254691U (en) | 2022-05-12 | 2022-05-12 | High-precision inner gear pitch circle inner tensioning rubber expansion sleeve and gear clamp |
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| CN217254691U true CN217254691U (en) | 2022-08-23 |
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| CN202221138262.0U Active CN217254691U (en) | 2022-05-12 | 2022-05-12 | High-precision inner gear pitch circle inner tensioning rubber expansion sleeve and gear clamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116021445A (en) * | 2023-03-27 | 2023-04-28 | 成都成林数控刀具股份有限公司 | Expansion sleeve, adhesive tool and production method of expansion sleeve |
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2022
- 2022-05-12 CN CN202221138262.0U patent/CN217254691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116021445A (en) * | 2023-03-27 | 2023-04-28 | 成都成林数控刀具股份有限公司 | Expansion sleeve, adhesive tool and production method of expansion sleeve |
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