CN215747875U

CN215747875U - Contact seat regular cross hole machining clamp

Info

Publication number: CN215747875U
Application number: CN202121958058.9U
Authority: CN
Inventors: 高晓刚
Original assignee: Baoji Xinya Electric Co ltd
Current assignee: Baoji Xinya Electric Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-08
Anticipated expiration: 2031-08-19

Abstract

The fixture for processing the right cross hole of the contact base is provided with a fixture platform; the clamp platform is provided with a platform U-shaped groove; a sink groove is formed in the center of the upper end face of the clamp platform; a circular positioning boss is arranged at the center of the sinking groove; the positioning boss is provided with a jack; the jack is vertically provided with a positioning inserted link; a pressing plate is arranged through the contact seat horizontal axial direction contact seat shaft hole; two ends of the pressing plate are provided with U-shaped grooves of the pressing plate; the middle part of the pressing plate is provided with an avoidance groove; and the upper end of the fastening screw rod is screwed with the compression nut, and the lower end of the fastening screw rod penetrates through the U-shaped groove of the pressing plate and the U-shaped groove of the platform and then is screwed with the inner threaded hole of the platform of the numerical control machining center so as to vertically compress the contact seat and fix the contact seat at the center of the platform of the clamp. The utility model effectively solves the technical problem of high-precision cross vertical processing of the eccentric hole at the bottom end of the contact base relative to the horizontal axial contact base shaft hole, and has the advantages of simple structure, convenient clamping and batch high-efficiency production.

Description

Contact seat regular cross hole machining clamp

Technical Field

The utility model belongs to the technical field of auxiliary machining clamps of high-voltage switch connecting mechanisms, and particularly relates to a clamp for machining a contact base right cross hole.

Background

An aluminum alloy contact base for high-voltage switch is used in the electric connection part of large-scale electric equipment such as high-voltage combined electric appliance, and is mainly composed of a conductive rod, a conductive contact finger and a shielding contact base for mounting the contact finger. In the cast aluminum contact base 5 integrally formed as shown in fig. 1, fig. 2 and fig. 3, the shielding contact base body 5-7 of the contact base 5 is cylindrical, and the outer side of the contact base body 5-7 is provided with the arc barrel-shaped shielding cover 5-6. The processing of the bottom eccentric hole 5-5 in the positive cross hole of the contact base 5 needs to vertically clamp the contact base 5 in a numerical control center, and the following technical scheme is provided for ensuring the cross vertical processing precision of the bottom eccentric hole 5-5 relative to the horizontal axial contact base shaft hole 5-4.

SUMMERY OF THE UTILITY MODEL

The technical problems solved by the utility model are as follows: the utility model provides a touch seat cross hole adds clamping apparatus adopts longitudinal connecting portion and location boss to clamp the location, uses the clamp plate to pass horizontal axial and touches seat shaft hole axial and compress tightly fixed mode, solves the perpendicular processing technique problem of high accuracy that touches seat bottom eccentric orfice relative horizontal axial and touch seat shaft hole.

The technical scheme adopted by the utility model is as follows: the contact base regular cross hole machining clamp is provided with a clamp platform; the axial symmetry sides of the clamp platform are respectively provided with a platform U-shaped groove; a sink groove is formed in the center of the upper end face of the clamp platform; a circular positioning boss is arranged at the center of the sinking groove; the positioning lug boss is coaxially inserted and matched with a central seat hole formed at the outer side end of the longitudinal connecting part of the contact seat; the positioning boss is provided with a jack; the jack is vertically provided with a positioning inserted link; the positioning inserted rod is inserted and matched with one mounting hole in the center seat hole of the contact seat; a horizontal axial contact seat shaft hole is vertically arranged on the central line of the longitudinal connecting part of the contact seat, and a pressing plate is arranged through the horizontal axial contact seat shaft hole of the contact seat; two ends of the pressing plate are provided with U-shaped grooves of the pressing plate; an avoidance groove is formed on the vertical side wall in the middle of the pressing plate; and the upper end of the fastening screw rod is screwed with the compression nut, and the lower end of the fastening screw rod penetrates through the U-shaped groove of the pressing plate and the U-shaped groove of the platform and then is screwed with the inner threaded hole of the platform of the numerical control machining center so as to vertically compress the contact seat and fix the contact seat at the center of the platform of the clamp.

In the above technical solution, further: platform U type groove evenly distributed and interval parallel of anchor clamps platform each side have three, and platform U type groove in the middle of is located the setting of anchor clamps platform symmetry center.

In the above technical solution, further: the axial height of the boss of the positioning boss is equal to the axial depth of the seat hole of the central seat hole; the size of the gap between the outer diameter of the positioning boss and the inner diameter of the central seat hole in coaxial positioning and splicing adaptation is less than or equal to 0.3 mm; the edge of the boss of the positioning boss is provided with an arc chamfer.

In the above technical solution, preferably: the insertion holes are screwed and matched with the insertion rods.

In the above technical solution, further: the inserting gap between the inserting rod and the contact seat mounting hole is smaller than or equal to 1 mm; the insertion end part at the top end of the insertion rod is provided with an arc chamfer.

In the above technical solution, preferably: the pressing plate is of a cylindrical structure, and the upper half parts of two ends of the cylinder of the pressing plate are provided with first-order horizontal step grooves; the end part of the first-order horizontal step groove is provided with a pressing plate U-shaped groove.

In the above technical solution, further: the middle avoidance groove of the pressure plate is used for processing an eccentric hole at the bottom end of the adaptive avoidance contact seat; the eccentric hole is in cross-shape with the central line of the horizontal axial contact seat shaft hole of the contact seat.

Compared with the prior art, the utility model has the advantages that:

1. the positioning boss vertically positions the contact base, the insert rod on the positioning boss is used for stopping rotation of the contact base, and the pressing plate tightly presses and fixes the contact base on the clamp platform so as to machine the eccentric hole at the bottom end of the contact base, so that the eccentric hole is spatially cross-perpendicular to the central line of the horizontal axial contact base shaft hole of the contact base, the machining perpendicularity of the eccentric hole is ensured, and batch, efficient and high-precision production of the eccentric hole of the contact base can be realized.

2. The contact seat can be clamped and fixed on the clamp platform through the platform U-shaped groove in the middle, the clamp platform can be fixed on the numerical control machining center platform through the platform U-shaped grooves on the two sides, and the U-shaped groove is combined with the fastener for clamping, so that the clamp is simple, quick and convenient.

3. When the positioning boss provided with the arc chamfer is precisely inserted and matched with the central seat hole of the contact seat, the arc chamfer of the positioning boss has a guiding function, even if the insertion fit clearance is extremely small, the rapid insertion positioning between the positioning boss and the central seat hole of the contact seat can be facilitated, the operation is simple, and the positioning is precise and reliable.

4. According to the utility model, the positioning inserted rod is installed in the inserting hole in a screwing and matching manner, and compared with the installation mode of inserting the inserted rod into the inserting hole, the coaxial matching precision of the inserted rod and the inserting hole is high, so that the coaxial precision of the inserting rod inserting positioning installation hole is high; moreover, the top end of the inserted bar is provided with an arc chamfer, and the inserted bar has a guiding function when being inserted into the mounting hole, so that the inserted bar can be quickly positioned and inserted into the mounting hole.

5. The pressing plate is of a cylindrical structure, and compared with a square pressing plate structure, the pressing plate can prevent the pressing plate from damaging the horizontal axial contact seat shaft hole of the contact seat, and the integrity of the horizontal axial contact seat shaft hole is protected and is not abraded.

6. The avoidance groove is formed in the middle of the pressing plate, and when the eccentric hole is machined, the avoidance groove is used for effectively avoiding a drilling bit, so that the machining verticality of the eccentric hole relative to the horizontal axis of the contact seat and the shaft hole of the contact seat is ensured.

Drawings

FIG. 1 is a perspective view of a clamped workpiece contact of the fixture of the present invention;

FIG. 2 is a schematic longitudinal sectional view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a perspective view of the clamp of the present invention;

FIG. 5 is a perspective view of a preferred embodiment of the clamp press plate of the present invention;

FIG. 6 is a perspective view of the clamp platform of the present invention;

FIG. 7 is a perspective view of the clip in use according to the present invention;

FIG. 8 is a front view of the platen of FIG. 5 in accordance with the present invention;

FIG. 9 is a perspective view of the clamp of FIG. 5 illustrating the pressure plate avoiding groove avoiding the eccentric hole at the bottom end of the contact base;

in the figure: 1-a clamp platform, 2-a platform U-shaped groove, 3-a sink groove, 4-a positioning boss, 5-a contact base, 5-1 longitudinal connecting parts, 5-2 central base holes, 5-3 mounting holes, 5-4 horizontal axial contact base shaft holes, 5-5 eccentric holes, 5-6 shielding cases and 5-7 contact base bodies; 6-jack, 7-inserted rod, 8-pressing plate, 9-pressing plate U-shaped groove, 10-avoiding groove, 11-fastening screw rod and 12-compression nut; 801-first order horizontal step groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 9 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A contact seat cross hole machining clamp is shown in figures 1, 2 and 3, and a contact seat 5 is provided with a contact seat body 5-7 and a longitudinal connecting portion 5-1 which are perpendicular to each other in space. The contact base seat body 5-7 is externally provided with an arc barrel-shaped shielding cover 5-6, the bottom of the shielding cover 5-6 is a plane, the bottom plane of the shielding cover 5-6 is provided with a bottom end eccentric hole 5-5, and the bottom end eccentric hole 5-5 is spatially cross-perpendicular to a horizontal axial contact base shaft hole 5-4 of the contact base seat body 5-7. The top end of a longitudinal connecting part 5-1 integrally formed with the contact base 5 is provided with a central base hole 5-2, the central base hole 5-2 is provided with four mounting holes 5-3, and when the central base hole 5-2 and the mounting holes 5-3 of the contact base 5 are formed in a fine machining mode and the bottom end eccentric hole 5-5 needs to be machined, the clamp disclosed by the utility model needs to be used.

The contact seat cross hole machining clamp (shown in figures 4, 6 and 7) is provided with a clamp platform 1. The fixture platform 1 is a cuboid thick plate structure. The clamp platform 1 is used for being horizontally placed, pressed and fixedly installed on the numerical control machining center platform.

The axial symmetry sides of the clamp platform 1 are respectively provided with a platform U-shaped groove 2. The platform U-shaped groove 2 is used for passing a fastening screw 11 described later. In the above embodiment, further: platform U type groove 2 evenly distributed and interval parallel of anchor clamps platform 1 every side have three, and platform U type groove 2 in the middle is located the symmetrical center setting of anchor clamps platform 1. In general, a platform U-shaped groove 2 in the middle is used for clamping and positioning a contact seat 5 to be processed. The rest of the platform U-shaped grooves 2 are used for clamping and fixing the fixture platform 1 by using fasteners. The clamp platform 1 can be pressed and fixed on the numerical control machining center platform by using a pressing plate and a fastening assembly.

A sink groove 3 is formed in the center of the upper end face of the clamp platform 1; the sinking groove 3 is a circular sinking groove, and the inner diameter of the sinking groove is larger than the outer diameter of the longitudinal connecting part 5-1 of the contact seat 5 so as to avoid clamping the longitudinal connecting part 5-1 of the contact seat 5.

A circular positioning boss 4 is arranged in the center of the sinking groove 3; the positioning boss 4 is coaxially inserted and matched with a central seat hole 5-2 formed at the outer side end of a longitudinal connecting part 5-1 of the contact seat 5.

In the above embodiment, further: the boss axial height of the positioning boss 4 is equal to the seat hole axial depth of the central seat hole 5-2. When the central seat hole 5-2 of the longitudinal connecting part 5-1 of the contact seat 5 is inserted and installed on the positioning boss 4 in an adaptive manner, vertical positioning and clamping of the central seat hole 5-2 of the longitudinal connecting part 5-1 of the contact seat 5 on the clamp platform are realized, and the subsequent steps only need to compress and fix the contact seat 5.

The size of the coaxial positioning splicing gap between the outer diameter of the circular positioning boss 4 and the inner diameter of the central seat hole 5-2 is less than or equal to 0.3 mm. In order to facilitate the insertion adaptation, the edge of the boss of the positioning boss 4 is provided with a circular arc chamfer. The arrangement of the arc chamfer enables the positioning boss 4 to be matched with the central seat hole 5-2 in an inserting and positioning mode to provide guidance, so that the positioning and inserting operation of high-precision matching is easier to perform, even if the matching gap is extremely small, the rapid inserting and positioning between the positioning boss 4 and the central seat hole 5-2 of the contact seat can be facilitated, the operation is simple, and the positioning is accurate and reliable; and on the other hand, an arc chamfer is arranged, so that the positioning boss 4 is effectively prevented from being damaged in the repeated clamping process.

The upper end surface of the positioning boss 4 is provided with an insertion hole 6; the insertion hole 6 is vertically provided with an insertion rod 7; the insertion rod 7 can be inserted and matched with the insertion hole 6; the inserting rod 7 can also be connected with the inserting hole 6 in a screwing and matching way.

In the above embodiment, preferably: the insertion hole 6 is screwed and matched with the insertion rod 7. The installation is carried out in a screwing and matching mode, so that the coaxiality of the insertion rod 7 and the insertion hole 6 is guaranteed, the positioning precision is higher when the insertion rod 7 is inserted in a positioning mode in a mounting hole 5-3 which is described later, and the insertion rod 7 is used for preventing the contact base 5 from rotating.

The inserted bar 7 is inserted and matched with one mounting hole 5-3 of the central seat holes 5-2 of the contact seat 5; the inserting rod 7 is inserted into the central seat hole 5-2 to prevent the contact seat 5 from rotating. And after the inserted rod 7 is inserted into the central seat hole 5-2, the central line of the horizontal axial contact seat shaft hole 5-4 of the contact seat body 5-7 is parallel to and coplanar with the symmetrical central line of the clamp platform 1 from top to bottom.

In the above embodiment, further: the inserting gap between the inserting rod 7 and the mounting hole 5-3 of the contact base 5 is less than or equal to 1 mm; the insertion end part at the top end of the insertion rod 7 is provided with an arc chamfer. Because the fit clearance is small, if the insertion end of the insertion rod 7 has no arc chamfer, the insertion operation of the insertion rod 7 and the mounting hole 5-3 is difficult to carry out, so that the insertion rod 7 is made into the arc chamfer, and the rapid positioning and guiding insertion of the insertion rod 7 are facilitated.

Therefore, the inserting rod 7 is rotatably matched and installed in the inserting hole 6, and compared with an inserting mode, the coaxial matching precision of the inserting rod 7 and the inserting hole 6 is high, so that the coaxial precision of the inserting rod 7 in the inserting positioning installation hole 5-3 is high; similarly, the top end of the insertion rod 7 is provided with an arc chamfer, and the insertion rod has a guiding function when being inserted into the mounting hole 5-3 in a high-precision matching manner, so that the insertion rod 7 can be quickly positioned and inserted into the mounting hole 5-3.

The contact seat is vertical to the central line of a longitudinal connecting part 5-1 of the contact seat 5 shown in figure 1, a horizontal axial contact seat shaft hole 5-4 is arranged, and a pressing plate 8 horizontally penetrates through the horizontal axial contact seat shaft hole 5-4; two ends of the pressing plate 8 are provided with pressing plate U-shaped grooves 9. The pressing plate 8 includes a cylindrical pressing plate and a flat pressing plate.

In the above embodiment, preferably: according to the utility model, the press plate 8 is preferably of a cylindrical structure, and the press plate adopting the cylindrical structure is in surface contact with the contact seat horizontal axial contact seat shaft hole 5-4 when in contact with the contact seat horizontal axial contact seat shaft hole 5-4, so that the press plate 8 is prevented from scratching the contact seat horizontal axial contact seat shaft hole 5-4, the integrity of the horizontal axial contact seat shaft hole 5-4 is protected, and the press plate is not abraded. And for realizing the function of compressing tightly: the upper half parts of the two ends of the cylinder of the pressure plate 8 are respectively provided with a first-order horizontal step groove 801 (as shown in figure 5); the end of the first-order horizontal step groove 801 is provided with a pressing plate U-shaped groove 9.

Therefore, the contact base 5 can be clamped and fixed on the clamp platform 1 through the platform U-shaped groove 2 in the middle, the clamp platform 1 can be fixed on the numerical control machining center platform through the platform U-shaped grooves 2 on the two sides, and the clamping operation of the U-shaped grooves 2 is simple, rapid and convenient.

During clamping: the upper end of the fastening screw rod 11 is screwed with the compression nut 12, and the compression nut 12 presses the pressure plate 8 downwards. The lower end of the fastening screw rod 11 penetrates through the pressing plate U-shaped groove 9 and the platform U-shaped groove 2 successively and then is screwed with the platform internal thread hole of the numerical control machining center, so that the contact base 5 is vertically pressed and fixed at the center of the clamp platform 1.

On the basis of the above steps: an avoiding groove 10 is arranged on the vertical side wall in the middle of the pressing plate 8. In the above embodiment, further: an avoidance groove 10 is formed in the middle of the pressing plate 8 and is used for processing an eccentric hole 5-5 at the bottom end of the avoidance contact seat 5 in a matching mode (as shown in fig. 9); when the pressing plate 8 is assembled with the contact seat horizontal axial direction contact seat shaft hole 5-4, the pressing plate 8 is rotated, so that the middle avoiding groove 10 of the pressing plate 8 is right opposite to the direction of the eccentric hole 5-5 to be processed, drilling of a drill bit is avoided through the avoiding groove 10, and meanwhile, the step groove plane of the first-order horizontal step groove 801 is horizontally arranged upwards. Because the contact seat 5 is vertically and tightly assembled on the clamp platform 1, the processed eccentric hole 5-5 is spatially cross-perpendicular to the central line of the horizontal axial contact seat shaft hole 5-4 of the contact seat, and the processing precision of the contact seat cross hole is ensured.

The working principle of the utility model is as follows: the contact base 5 is clamped and positioned by the longitudinal connecting part 5-1 and the positioning boss 4, the contact base 5 is positioned by the insertion of the mounting hole 5-3 and the insertion rod 7 to prevent the contact base 5 from rotating, and the technical problem of high-precision cross vertical processing of the eccentric hole 5-5 at the bottom end of the contact base 5 relative to the horizontal axial contact base shaft hole 5-4 is solved by a mode that the pressing plate 8 penetrates through the horizontal axial contact base shaft hole 5-4 to axially press the contact base 5.

Therefore, the positioning boss 4 vertically positions the contact base 5, the inserted rod 7 on the positioning boss 4 is used for stopping rotation of the contact base 5, the pressing plate 8 tightly presses and fixes the contact base 5 on the clamp platform 1 to machine the eccentric hole 5-5 at the bottom end of the contact base 5, so that the eccentric hole 5-5 is spatially cross-perpendicular to the central line of the horizontal axial contact base shaft hole 5-4 of the contact base, the machining verticality of the eccentric hole 5-5 is ensured, and batch, efficient and high-precision production of the eccentric hole 5-5 of the contact base 5 can be realized.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. Touch positive cross hole machining anchor clamps of seat, its characterized in that: having a clamp platform (1); the clamp platform (1) is provided with platform U-shaped grooves (2) on the axisymmetric sides respectively; a sink groove (3) is formed in the center of the upper end face of the clamp platform (1); a circular positioning boss (4) is arranged at the center of the sinking groove (3); the positioning boss (4) is coaxially inserted and matched with a central seat hole (5-2) formed at the outer side end of a longitudinal connecting part (5-1) of the contact seat (5); the positioning boss (4) is provided with a jack (6); the insertion hole (6) is vertically provided with an insertion rod (7); the inserted rod (7) is inserted and matched with one mounting hole (5-3) of the central seat holes (5-2) of the contact seat (5); a horizontal axial contact seat shaft hole (5-4) is arranged perpendicular to the central line of the longitudinal connecting part (5-1) of the contact seat (5), and a pressing plate (8) is arranged through the horizontal axial contact seat shaft hole (5-4); two ends of the pressing plate (8) are provided with pressing plate U-shaped grooves (9); an avoidance groove (10) is formed in the vertical side wall in the middle of the pressing plate (8); the upper end of a fastening screw rod (11) is screwed with a gland nut (12), and the lower end of the fastening screw rod (11) penetrates through a pressing plate U-shaped groove (9) and a platform U-shaped groove (2) successively and then is screwed with an inner threaded hole of a numerical control machining center platform so as to vertically compress and fix a contact seat (5) at the center of a clamp platform (1).

2. The fixture for machining the contact base regular cross hole according to claim 1, wherein: platform U type groove (2) evenly distributed and the interval parallel of anchor clamps platform (1) every side have threely, and platform U type groove (2) in the middle are located anchor clamps platform (1) symmetric center and set up.

3. The fixture for machining the contact base regular cross hole according to claim 1, wherein: the axial height of the boss of the positioning boss (4) is equal to the axial depth of the seat hole of the central seat hole (5-2); the size of a gap between the outer diameter of the positioning boss (4) and the inner diameter of the central seat hole (5-2) in coaxial positioning, splicing and adapting is less than or equal to 0.3 mm; and the edge of the boss of the positioning boss (4) is provided with an arc chamfer.

4. The fixture for machining the contact base regular cross hole according to claim 1, wherein: the insertion holes (6) are screwed to be matched with the insertion rods (7) in an adaptive mode.

5. The contact base normal cross hole machining fixture as claimed in claim 1 or 4, wherein: the inserting gap between the inserting rod (7) and the mounting hole (5-3) of the contact base (5) is less than or equal to 1 mm; and an arc chamfer is arranged at the inserting end part at the top end of the inserting rod (7).

6. The fixture for machining the contact base regular cross hole according to claim 1, wherein: the pressing plate (8) is of a cylindrical structure, and the upper half parts of two ends of the cylinder of the pressing plate (8) are provided with a first-order horizontal step groove (801); the end part of the first-order horizontal step groove (801) is provided with a pressing plate U-shaped groove (9).

7. The contact base normal cross hole machining fixture as claimed in claim 1 or 6, wherein: the middle avoidance groove (10) of the pressure plate (8) is used for processing an eccentric hole (5-5) at the bottom end of the adaptive avoidance contact seat (5); the eccentric hole (5-5) is spatially cross-perpendicular to the central line of the horizontal axial contact seat shaft hole (5-4) of the contact seat.