CN209792665U

CN209792665U - Case boring grab

Info

Publication number: CN209792665U
Application number: CN201920324797.9U
Authority: CN
Inventors: 刘蜀
Original assignee: Chengdu Industry and Trade College
Current assignee: Chengdu Industry and Trade College
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2019-12-17
Anticipated expiration: 2029-03-14

Abstract

The utility model discloses a valve core drilling clamp, which comprises a supporting unit and a positioning and clamping unit; the positioning and clamping unit comprises a sliding block, a positioning block and a clamping mechanism, wherein the rear end of the positioning block is rotatably connected with the sliding block, the clamping mechanism is arranged at the front end of the positioning block, a positioning hole is formed in the front end of the positioning block, and a plurality of through holes are formed in the hole wall of the positioning hole; the supporting unit comprises an upper clamping plate and a lower clamping plate which are respectively arranged at the upper side and the lower side of the positioning block, and a driving mechanism for driving the upper clamping plate and the lower clamping plate to move in opposite directions; the sliding block is arranged between the upper clamping plate and the lower clamping plate in a vertically sliding mode. The utility model positions the valve core through the positioning block, clamps the valve core through the clamping mechanism, guides the drill bit through the through hole, rotates the positioning block after completing one radial hole, and then processes another radial hole until all radial holes are processed; therefore, drilling and reaming of six radial holes can be completed only by clamping once.

Description

Case boring grab

Technical Field

The utility model belongs to the technical field of the case machine tooling, concretely relates to case boring grab.

Background

Fig. 1 shows a valve core of a prior art oil pump distribution valve, in which six radial holes need to be machined on an outer cylindrical surface of the valve core, and the six radial holes are uniformly distributed around a central axis of the valve core. The valve core is small in batch, six radial holes are machined by using the bench drill for reducing machining cost, clamping times need to be reduced for improving the position accuracy of the six radial holes, and therefore a special clamp needs to be designed to complete drilling and reaming machining of the six radial holes.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the drilling and reaming processing of six radial holes can be accomplished by using a bench drill to clamp once, the utility model aims to provide a valve core drilling clamp. The utility model positions the valve core through the positioning block, clamps the valve core through the clamping mechanism, guides the drill bit through the through hole, rotates the positioning block after completing one radial hole, and then processes another radial hole until all radial holes are processed; therefore, drilling and reaming of six radial holes can be completed only by clamping once; the utility model discloses a supporting element is applyed the drill bit and is transmitted the drilling machine for the power of location clamping unit on, has reduced the deformation of location clamping unit, has improved the positioning accuracy of location clamping unit.

The utility model discloses the technical scheme who adopts does:

A valve core drilling clamp comprises a supporting unit and a positioning and clamping unit;

The positioning and clamping unit comprises a sliding block, a positioning block and a clamping mechanism, wherein the rear end of the positioning block is rotatably connected with the sliding block, the clamping mechanism is arranged at the front end of the positioning block, a positioning hole is formed in the front end of the positioning block, and a plurality of through holes are formed in the hole wall of the positioning hole;

The supporting unit comprises an upper clamping plate and a lower clamping plate which are respectively arranged at the upper side and the lower side of the positioning block, and a driving mechanism for driving the upper clamping plate and the lower clamping plate to move in opposite directions; the sliding block is arranged between the upper clamping plate and the lower clamping plate in a vertically sliding mode.

as a further alternative of the valve core drilling jig, the driving mechanism comprises a bottom plate fixed below the upper clamping plate, a slanting wedge horizontally sliding on the upper part of the bottom plate and a driving device for driving the slanting wedge to horizontally slide; the upper part of the inclined wedge is provided with a first inclined plane; the lower clamping plate is arranged in a vertically sliding mode, and a second inclined plane matched with the first inclined plane is arranged on the lower portion of the lower clamping plate.

As a further alternative of the valve core drilling clamp, a reset elastic piece is arranged between the lower clamping plate and the bottom plate.

as a further alternative of the valve core drilling clamp, a guide shaft is arranged between the bottom plate and the upper clamping plate; two ends of the guide shaft are respectively fixed on the bottom plate and the upper clamping plate, and the middle part of the guide shaft is provided with a limiting step surface; the sliding block is in sliding fit with a guide shaft at the upper part of the limiting step surface; and the lower clamping plate is in sliding fit with the guide shaft at the lower part of the limiting step surface.

As a further alternative of the valve core drilling clamp, the driving device comprises a screw rod with one end movably connected with the inclined wedge and a first nut in threaded connection with the screw rod; the first nut is fixed on the bottom plate.

As a further alternative of the valve core drilling clamp, the positioning hole is in a step shape with a large front part and a small back part.

As a further alternative of the valve core drilling clamp, a clamping groove is formed in the front end face of a large hole of the positioning hole, and a rotation stopping pin is matched in the clamping groove.

As a further alternative of the valve core drilling clamp, the clamping mechanism comprises a cover plate, one end of which is hinged to the positioning block, a detachable connecting structure arranged between the other end of the cover plate and the positioning block, and a screw which is in threaded connection with the cover plate; one end of the screw abuts against the rotation stop pin.

As a further alternative of the valve core drilling jig, the rotation stop pin has a rectangular parallelepiped shape.

As a further alternative of the valve core drilling jig, the detachable connection structure comprises a bolt with one end hinged on the positioning block and a second nut screwed on the other end of the bolt; the cover plate is provided with an opening, and the opening is sleeved outside the bolt.

the utility model has the advantages that:

the utility model positions the valve core through the positioning block, clamps the valve core through the clamping mechanism, guides the drill bit through the through hole, rotates the positioning block after completing one radial hole, and then processes another radial hole until all radial holes are processed; therefore, drilling and reaming of six radial holes can be completed only by clamping once; the utility model discloses a supporting element is applyed the drill bit and is transmitted the drilling machine for the power of location clamping unit on, has reduced the deformation of location clamping unit, has improved the positioning accuracy of location clamping unit.

other advantageous effects of the present invention will be described in detail in the detailed description of the invention.

Drawings

in order to more clearly illustrate the technical solution of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a valve core of a prior art oil pump distribution valve;

Fig. 2 is a schematic structural view of the valve core drilling jig of the present invention;

FIG. 3 is a cross-sectional view of the valve core drilling fixture shown in FIG. 2;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic view of the valve core drilling fixture of FIG. 2 during a drilling operation;

FIG. 6 is a schematic structural diagram of a locating block in the valve core drilling fixture shown in FIG. 2;

fig. 7 is a schematic structural view of a guide shaft in the valve core drilling jig shown in fig. 2.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. It is to be understood that the drawings are designed solely for the purposes of illustration and description and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. 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.

the front end and the rear end are the end facing the operator and the end far away from the operator.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1:

Fig. 1 shows a specific structure of a valve core 10 of an oil pump distribution valve, wherein the valve core 10 comprises a large-diameter section and a small-diameter section 14 which are connected in sequence; the end face of the end, far away from the small diameter section 14, of the large diameter section is provided with a rotation stopping groove 11, the bottom of the rotation stopping groove 11 is provided with a blind hole, the hole wall of the blind hole is provided with six radial holes 12, and the six radial holes penetrate through the small diameter section 14 along the radial direction of the small diameter section 14.

As shown in fig. 2, the valve core drilling jig of the present embodiment is used for machining six radial holes 12 of the valve core 10 shown in fig. 1 by one-time clamping. The valve core drilling jig includes a support unit 20 and a positioning and clamping unit 30. The positioning and clamping unit 30 is used for positioning and clamping the valve core 10, and switching the stations of the valve core 10, so that six radial holes of the valve core 10 can be machined by one-time clamping. The supporting unit 20 is used for transmitting the force applied by the drill 40 to the positioning and clamping unit 30 to a drilling machine (not shown), so as to reduce the deformation of the positioning and clamping unit 30 and further improve the repeated positioning accuracy of the positioning and clamping unit 30.

Specifically, as shown in fig. 3, the positioning and clamping unit 30 includes a slider 37, a positioning block 31 having a rear end rotatably connected to the slider 37, and a clamping mechanism disposed at a front end of the positioning block 31, wherein a positioning hole 311 is formed at the front end of the positioning block 31, and a plurality of through holes 314 are formed in a hole wall of the positioning hole 311.

The rotary connection of the slider 37 to the positioning block 31 can be realized by the prior art, for example: a rotating shaft is fixed at one end of the sliding block 37 close to the positioning block 31, a cylindrical hole is formed at one end of the positioning block 31 facing the sliding block 37, and the rotating shaft is in rotating fit with the cylindrical hole; or, a cylindrical hole is opened at one end of the sliding block 37 close to the positioning block 31, and a rotating shaft is fixedly connected at one end of the positioning block 31 facing the sliding block 37, and is in rotating fit with the cylindrical hole; in this embodiment, as shown in fig. 3, a rotating shaft 38 is fixed at the rear end of the positioning block 31, a cylindrical hole is formed at the front end of the slider 37, and a rolling bearing is disposed between the rotating shaft 38 and the cylindrical hole to reduce the rotation resistance of the rotating shaft 38. Of course, other ways can be adopted to realize the rotation connection between the sliding block 37 and the positioning block 31, and the present invention is not limited thereto, as long as the sliding block 37 and the positioning block 31 can rotate relatively.

The positioning hole 311 is fitted with the small diameter section 14 to restrict five degrees of freedom of the spool 10. The positioning hole 311 may be a blind hole or a through hole, and when the positioning hole 311 is a blind hole, the bottom surface of the positioning hole 311 may abut against one of the two end surfaces of the valve element 10, or the front end surface of the positioning hole 311 may abut against the step surface 13 of the valve element 10; when the positioning hole 311 is provided as a through hole, the front end surface of the positioning hole 311 is made to abut against the step surface 13 of the valve element 10; a strip-shaped rotation stopping piece can be fixed on the positioning block 31, and the rotation stopping piece is matched with the rotation stopping groove 11 to limit the remaining degree of freedom of the valve core 10; the valve element 10 may be clamped by a clamping mechanism, and the remaining one degree of freedom of the valve element 10 may be limited by friction.

The through hole 314 corresponds to the radial hole 12 of the valve body 10, and in use, as shown in fig. 5, the drill 40 is inserted through the through hole 314, and then the radial hole 12 is formed.

clamping mechanism can adopt current clamping mechanism such as screw clamping mechanism, elbow clamp or eccentric wheel clamping mechanism to realize, the utility model discloses do not injecing to this, as long as enable case 10 and locating piece 31 relatively fixed can.

As shown in fig. 3, the supporting unit 20 includes an upper clamp plate 24 and a lower clamp plate 25 respectively disposed at upper and lower sides of the positioning block 31, and a driving mechanism for driving the upper clamp plate 24 and the lower clamp plate 25 to move in opposite directions; the slide block 37 is slidably disposed up and down between the upper clamp plate 24 and the lower clamp plate 25. As shown in fig. 4, a bit escape hole 241 is opened in the clamping plate adjacent to the bit.

The driving mechanism can be realized by adopting a screw-nut structure, namely, threaded holes are respectively processed on the upper clamping plate 24 and the lower clamping plate 25, one of the threaded holes is a positive thread, the other threaded hole is a negative thread, a screw rod is arranged, the two ends of the screw rod are respectively in threaded fit with the threaded holes of the upper clamping plate 24 and the threaded holes of the lower clamping plate 25, the screw rod is rotated, and then the upper clamping plate 24 and the lower clamping plate 25 move in opposite directions. Other existing driving mechanisms can be adopted to realize the opposite movement of the upper clamping plate 24 and the lower clamping plate 25, the utility model discloses do not limit to this, as long as can drive the upper clamping plate 24 and the lower clamping plate 25 will fix a position the clamping unit 30 and press from both sides tightly.

When in use, the valve core drilling clamp of the utility model is fixed on a drilling machine, the valve core 10 is inserted into the positioning hole 311, the clamping mechanism acts to clamp the valve core 10 tightly, the positioning block 31 is rotated to make the central axis of the through hole 314 coincide with the central axis of the drill bit 40, the driving mechanism acts, the upper clamping plate 24 and the lower clamping plate 25 move in opposite directions, the positioning and clamping unit 30 is fixed, the drill bit 40 acts, after one radial hole 12 is processed, the drill bit 40 retreats from the valve core drilling clamp, the driving mechanism acts, the upper clamping plate 24 and the lower clamping plate 25 move in opposite directions, the positioning and clamping unit 30 is loosened, the positioning block 31 is rotated to make the central axis of the other through hole 314 coincide with the central axis of the drill bit 40, the driving mechanism acts, the upper clamping plate 24 and the lower clamping plate 25 move in opposite directions, the positioning and clamping unit 30 is fixed, the drill bit 40 acts, the other radial, the machining of six radial holes 12 is completed.

Example 2:

On the basis of embodiment 1, as shown in fig. 3, the driving mechanism of this embodiment includes a bottom plate 21 fixed below an upper clamping plate 24, a slanting wedge 26 horizontally sliding on the upper portion of the bottom plate 21, and a driving device for driving the slanting wedge 26 to horizontally slide; the upper part of the inclined wedge 26 is provided with a first inclined surface; the lower clamping plate 25 is arranged in a vertically sliding mode, and a second inclined surface matched with the first inclined surface is arranged on the lower portion of the lower clamping plate 25.

Through setting up first inclined plane and second inclined plane for the inclined wedge 26 can the auto-lock with the lower plate 25, and as long as the inclination on first inclined plane and the inclination on second inclined plane set up rationally promptly, no matter exert at vertical power of exerting much, relative motion can not take place between the inclined wedge 26 and the lower plate 25. The inclination angle is an included angle between the first inclined surface and the horizontal plane, and the inclination angle of the first inclined surface is equal to the inclination angle of the second inclined surface.

as shown in fig. 2, 4 and 5, in this embodiment, the bottom plate 21 is provided with a sliding slot, and the lower end of the inclined wedge 26 is adapted to the sliding slot, so as to realize the sliding connection between the bottom plate 21 and the inclined wedge 26; the sliding connection between the bottom plate 21 and the inclined wedge 26 can also be realized by arranging a linear guide rail between the inclined wedge 26 and the bottom plate 21; of course, other sliding structures in the prior art can be adopted to realize the sliding connection between the bottom plate 21 and the slanting wedge 26, which is not limited by the present invention.

The driving device can be realized by a linear driving mechanism in the prior art, such as a crank-slider mechanism, a lead screw-nut mechanism, etc., and when in use, a linear output member of the linear driving mechanism is connected with the inclined wedge 26.

As shown in fig. 3, the driving device in this embodiment includes a screw 28 having one end movably connected to the inclined wedge 26, and a first nut 27 threadedly connected to the screw 28; the first nut 27 is fixed to the base plate 21. The articulation is to prevent the screw 28 from rotating the wedges 26 together. In this embodiment, the active connection is implemented as follows: the inclined wedge 26 is provided with a T-shaped groove, one end of the screw 28 facing the inclined wedge 26 is fixed with a cylinder 281, and the cylinder 281 is arranged in the large end of the T-shaped groove, so that when the screw 28 rotates, the inclined wedge 26 only slides and does not rotate. By providing the screw 28 and the first nut 27, in the case where the upper and lower clamping plates 24 and 25 clamp the positioning and clamping unit 30, the relative movement between the wedges 26 and the lower clamping plate 25 can be prevented regardless of the inclination angles of the first and second inclined surfaces.

As shown in fig. 3, in the present embodiment, a return elastic member 29 is disposed between the lower plate 25 and the bottom plate 21, and the return elastic member 29 may be implemented by a compression spring, an extension spring, or the like. In this embodiment, the elastic return element 29 is an extension spring, and two ends of the extension spring are fixedly connected to the bottom plate 21 and the lower clamp plate 25, respectively. The elastic part 29 that resets is arranged, so that the lower clamping plate 25 can reset under the dual functions of the elastic force of the elastic part 29 and the self gravity, and the reset is more reliable compared with the reset by only relying on the self gravity of the lower clamping plate 25.

As shown in fig. 2 and 3, in the present embodiment, a guide shaft 23 is provided between the bottom plate 21 and the upper clamp plate 24; the two ends of the guide shaft 23 are respectively fixed on the bottom plate 21 and the upper clamping plate 24; the sliding block 37 and the lower clamping plate 25 are both arranged between the bottom plate 21 and the upper clamping plate 24 and are both sleeved outside the guide shaft 23. The guide shaft 23 may be provided in a polygonal column shape to prevent the slider 37 and the lower clamp plate 25 from rotating relative to the guide shaft 23; if the guide shaft 23 is provided in a cylindrical shape, at least two guide shafts 23 should be provided; in the present embodiment, as shown in fig. 2, two guide shafts 23 are provided.

In the present embodiment, two support columns 22 are provided between the front end of the bottom plate 21 and the front end of the upper plate 24, so as to reduce deformation of the upper plate 24, the bottom plate 21, and the guide shaft 23 and improve the rigidity of the structure.

Under the action of gravity, the positioning and clamping unit 30 will slide downward, and when the positioning block 31 needs to be rotated, the positioning and clamping unit 30 needs to slide upward, so that the positioning and clamping unit 30 is separated from the lower clamp plate 25, which increases the labor intensity of an operator, for this reason, in the present embodiment, as shown in fig. 7, a limit step surface 231 is provided in the middle of the guide shaft 23; the slide block 37 is in sliding fit with the guide shaft 23 on the upper part of the limiting step surface 231; the lower clamp plate 25 is slidably fitted to the guide shaft 23 at the lower portion of the stopper step surface 231. Therefore, the distance of the downward sliding of the positioning and clamping unit 30 is limited by the limiting step surface 231, and the need of upward sliding the positioning and clamping unit 30 when the positioning block 31 is rotated is avoided.

Example 3:

On the basis of embodiment 1 or 2, as shown in fig. 6, the positioning hole 311 in the present embodiment is stepped in a front-large rear-small manner so that the positioning hole 311 is fitted to the shape of the spool 10, thereby restricting five degrees of freedom of the spool 10 by the inner cylindrical surface of the small hole of the positioning hole 311 and the stepped surface 313.

as shown in fig. 3 and 6, a locking groove 312 is formed on a front end surface of a large hole of the positioning hole 311 in the present embodiment, and the locking groove 312 is adapted with the rotation stop pin 34. That is, the remaining rotational freedom of the valve body 10 is restricted by engaging the detent pin 34 with the detent groove 11 of the valve body 10.

example 4:

On the basis of embodiment 3, as shown in fig. 3, the clamping mechanism in this embodiment includes a cover plate 36 with one end hinged to the positioning block 31, a detachable connecting structure disposed between the other end of the cover plate 36 and the positioning block 31, and a screw 35 screwed on the cover plate 36; one end of the screw 35 abuts against the rotation stop pin 34. Since the screw 35 for clamping the valve cartridge 10 does not directly abut on the valve cartridge 10, the surface of the valve cartridge 10 is not damaged, and the surface quality of the valve cartridge 10 is improved.

As shown in fig. 3, the rotation preventing pin 34 in the present embodiment has a rectangular parallelepiped shape, but the rotation preventing pin 34 may have another polygonal columnar shape or a cylindrical shape.

as shown in fig. 2 and 3, the detachable connection structure in this embodiment includes a bolt 32 having one end hinged to the positioning block 31 and a second nut 33 screwed to the other end of the bolt 32; the cover plate 36 is provided with an opening which is fitted over the bolt 32. Because the cover plate 36 is provided with the opening, and one end of the bolt 32 is hinged on the positioning block 31, the clamping mechanism can be opened and the valve core 10 can be taken out only by unscrewing the second nut 33, so that the clamping time of the valve core 10 is greatly reduced, and the efficiency is improved.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. The utility model provides a case boring grab which characterized in that: comprises a supporting unit (20) and a positioning and clamping unit (30);

the positioning and clamping unit (30) comprises a sliding block (37), a positioning block (31) with the rear end rotatably connected with the sliding block (37) and a clamping mechanism arranged at the front end of the positioning block (31), wherein the front end of the positioning block (31) is provided with a positioning hole (311), and the hole wall of the positioning hole (311) is provided with a plurality of through holes (314);

The supporting unit (20) comprises an upper clamping plate (24) and a lower clamping plate (25) which are respectively arranged at the upper side and the lower side of the positioning block (31), and a driving mechanism for driving the upper clamping plate (24) and the lower clamping plate (25) to move in opposite directions; the sliding block (37) is arranged between the upper clamping plate (24) and the lower clamping plate (25) in a vertically sliding mode.

2. The valve core drilling jig of claim 1, wherein: the driving mechanism comprises a bottom plate (21) fixed below the upper clamping plate (24), a slanting wedge (26) horizontally sliding on the upper part of the bottom plate (21) and a driving device for driving the slanting wedge (26) to horizontally slide; the upper part of the inclined wedge (26) is provided with a first inclined plane; the lower clamping plate (25) is arranged in a vertically sliding mode, and a second inclined surface matched with the first inclined surface is arranged on the lower portion of the lower clamping plate (25).

3. The valve core drilling jig of claim 2, wherein: and a resetting elastic piece (29) is arranged between the lower clamping plate (25) and the bottom plate (21).

4. the valve core drilling jig of claim 2, wherein: a guide shaft (23) is arranged between the bottom plate (21) and the upper clamping plate (24); two ends of the guide shaft (23) are respectively fixed on the bottom plate (21) and the upper clamping plate (24), and the middle part of the guide shaft (23) is provided with a limiting step surface (231); the sliding block (37) is in sliding fit with a guide shaft (23) at the upper part of the limiting step surface (231); the lower clamping plate (25) is in sliding fit with a guide shaft (23) at the lower part of the limiting step surface (231).

5. The valve core drilling jig of claim 2, wherein: the driving device comprises a screw rod (28) with one end movably connected with the inclined wedge (26) and a first nut (27) in threaded connection with the screw rod (28); the first nut (27) is fixed to the base plate (21).

6. The valve core drilling jig according to any one of claims 1 to 5, wherein: the positioning hole (311) is in a step shape with a large front part and a small back part.

7. The valve core drilling jig of claim 6, wherein: the front end face of a large hole of the positioning hole (311) is provided with a clamping groove (312), and a rotation stopping pin (34) is matched in the clamping groove (312).

8. The valve core drilling jig of claim 7, wherein: the clamping mechanism comprises a cover plate (36) with one end hinged on the positioning block (31), a detachable connecting structure arranged between the other end of the cover plate (36) and the positioning block (31), and a screw (35) in threaded connection with the cover plate (36); one end of the screw (35) abuts against the rotation stop pin (34).

9. The valve core drilling jig of claim 8, wherein: the rotation stopping pin (34) is in a cuboid shape.

10. the valve core drilling jig of claim 8, wherein: the detachable connecting structure comprises a bolt (32) with one end hinged on the positioning block (31) and a second nut (33) in threaded connection with the other end of the bolt (32); the cover plate (36) is provided with an opening which is sleeved outside the bolt (32).