CN112247221A

CN112247221A - Pump case screw hole jig

Info

Publication number: CN112247221A
Application number: CN202011151058.8A
Authority: CN
Inventors: 叶玉堂; 郑尊纲
Original assignee: Suzhou Renowell Hydraulic Pump Co ltd
Current assignee: Suzhou Renowell Hydraulic Pump Co ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-01-22

Abstract

The invention discloses a pump shell screw hole drilling jig which comprises an upper layer assembly, a lower layer assembly and a guide post countersink drill; the upper assembly comprises an upper drill plate, an upper supporting nail, an upper hexagon socket head cap screw, an upper drill sleeve, a compression screw and a circular pressing plate, the number of the upper drill sleeve is four, the compression screw is located at the central position of the upper drill plate, the circular pressing plate is located on the compression screw, the lower assembly comprises a lower drill plate, a lower supporting nail, a lower hexagon socket head cap screw, a lower drill sleeve and a positioning mandrel, the number of the lower drill sleeve is four, the positioning mandrel is located at the central position of the lower drill plate, the positioning mandrel corresponds to the circular pressing plate, and the guide pillar drill is provided with a chamfering edge structure. The hydraulic pump shell drilling machine can drill holes in the hydraulic pump shell from two ends in sequence, so that the technical problems that screw holes in the existing similar products are too much inclined and the interference assembly of the screws is not advanced are solved, and the hydraulic pump shell drilling machine is simple in structure and high in machining precision.

Description

Pump case screw hole jig

Technical Field

The invention belongs to the technical field of hydraulic pump shell processing, and particularly relates to a screw hole drilling jig for a pump shell.

Background

The pump casing is a pump core mounting and positioning part of the hydraulic pump, and the pump core is fastened on the assembly of the mounting seat and the shaft after being assembled, so that the hydraulic whole pump is formed. 4 through-holes on the pump case are used for installing fastening screws, the length-diameter ratio of the through-holes is usually larger than 8, the through-holes belong to deep and long holes, the existing drilling process and clamp are drilled and machined from one end of the pump case, the 4 screw holes are prone to deflection too much, the problem that the interference assembly of the screws cannot be carried out is caused, and improvement is needed.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides a pump shell screw hole drilling jig to solve the problems in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a pump shell screw hole drilling jig comprises an upper layer assembly, a lower layer assembly and a guide post countersink drill; the upper-layer assembly comprises an upper drill plate, an upper supporting nail, an upper hexagon socket head cap screw, an upper drill bushing, a compression screw and a circular pressing plate, the number of the upper drill bushing is four, the upper drill bushing corresponds to four screw hole positions of a pump shell to be processed, the compression screw is located at the central position of the upper drill plate, the circular pressing plate is located on the compression screw, the lower-layer assembly comprises a lower drill plate, a lower supporting nail, a lower hexagon socket head cap screw, a lower drill bushing and a positioning mandrel, the number of the lower drill bushing is four, the lower drill bushing corresponds to four screw hole positions of the pump shell to be processed, the positioning mandrel is located at the central position of the lower drill plate, the positioning mandrel corresponds to the circular pressing plate, and a chamfering edge structure is arranged on the guide pillar drill.

In a preferred embodiment of the present invention, the upper drill plate is provided with upper guide holes, the lower drill plate is provided with lower guide holes, and the number of the upper guide holes and the number of the lower guide holes are four and are in one-to-one correspondence.

In a preferred embodiment of the present invention, the upper guide hole is matched with the upper support nail, the lower guide hole is matched with the lower support nail, and one upper guide hole is an error-proof hole.

In a preferred embodiment of the present invention, the device further includes a first guide pillar, a second guide pillar, and a third guide pillar, wherein bottom excircles of the first guide pillar, the second guide pillar, and the third guide pillar are matched with the lower guide hole, and top excircles of the first guide pillar and the third guide pillar are matched with the upper guide hole.

In a preferred embodiment of the present invention, the number of the second guide pillars is two, the top end outer circle of the third guide pillar is rhombic, and the diameter of the top end outer circle of the second guide pillar is 0.5mm to 1mm smaller than the diameter of the upper guide hole of the upper drilling template.

In a preferred embodiment of the present invention, the upper drill plate is provided with an upper positioning hole, the upper drill bushing is located in the upper positioning hole, the lower drill plate is provided with a lower positioning hole, and the lower drill bushing is located in the lower positioning hole.

In a preferred embodiment of the present invention, the drill plate is provided with an orientation pin.

In a preferred embodiment of the present invention, the lower drill template is provided with a notch structure at two ends of the middle.

The invention solves the defects in the background technology, and has the following beneficial effects:

the hydraulic pump shell drilling machine can drill holes in the hydraulic pump shell from two ends in sequence, so that the technical problems that screw holes in the existing similar products are too much inclined and the interference assembly of the screws is not advanced are solved, and the hydraulic pump shell drilling machine is simple in structure and high in machining precision.

Drawings

The invention is further explained below with reference to the figures and examples;

FIG. 1 is a schematic overall structure of a preferred embodiment of the present invention;

FIG. 2 is a partial schematic structural view of a preferred embodiment of the present invention;

FIG. 3 is an overall cross-sectional view of the preferred embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a guide pillar countersink drill according to a preferred embodiment of the present invention;

in the figure: 1. drilling a template; 2. an upper support pin; 3. an upper inner hexagonal socket head cap screw; 4. mounting a drill bushing; 5. a compression screw; 6. a circular pressing plate; 7. drilling a template; 8. a lower support pin; 9. a lower hexagon socket head cap screw; 10. a drill bushing is arranged; 11. positioning the mandrel; 12. a guide post countersink drill; 13. a first guide post; 14. a second guide post; 15. a third guide post; 16. an orientation pin; 17. a notch structure; 18. and (5) processing the pump shell.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention.

As shown in fig. 1 to 4, a pump shell screw hole drilling jig comprises an upper layer assembly, a lower layer assembly and a guide post countersink 12; the upper layer assembly comprises an upper drill plate 1, an upper supporting nail 2, an upper hexagon socket head cap screw 3, an upper drill sleeve 4, a compression screw 5 and a circular pressing plate 6, the number of the upper drill sleeve 4 is four, the upper drill sleeve 4 corresponds to four screw hole positions of a pump shell 18 to be processed, the compression screw 5 is located at the central position of the upper drill plate 1, the circular pressing plate 6 is located on the compression screw 5, the lower layer assembly comprises a lower drill plate 7, a lower supporting nail 8, a lower hexagon socket head cap screw 9, a lower drill sleeve 10 and a positioning mandrel 11, the number of the lower drill sleeve 10 is four, the lower drill sleeve 10 corresponds to four screw hole positions of the pump shell 18 to be processed, the positioning mandrel 11 is located at the central position of the lower drill plate 7, the positioning mandrel 11 corresponds to the position of the circular pressing plate 6, and a chamfering blade structure.

In the embodiment, four guide posts are fixed on a lower drill plate 7 through lower supporting nails 8 by lower hexagon socket head cap screws 9, a pump shell 18 to be processed is installed between an upper layer assembly and a lower layer assembly, an upper drill plate 1 is fixed on the four guide posts through upper supporting nails 2 by upper hexagon socket head cap screws 3, then a circular pressing plate 6 is pushed by screwing down compression screws 5, the pump shell 18 to be processed is compressed by the circular pressing plate 6, and after all operations are completed, a drill bit is adopted to respectively perform drilling operations from the direction of an upper drill sleeve 4 and the direction of a lower drill sleeve 10. The four counter bores of the pump shell 18 to be processed are processed by the guide post countersink drill 12, and the chamfer edge structure is arranged on the guide post countersink drill 12, so that the screw hole opening can be chamfered while the counter bores are processed, and the processing efficiency is improved.

In this embodiment, the upper drill plate 1 is provided with upper guide holes, the lower drill plate 7 is provided with lower guide holes, and the number of the upper guide holes and the number of the lower guide holes are four and are in one-to-one correspondence.

Specifically, the upper guide hole is matched with the upper support nail 2, the lower guide hole is matched with the lower support nail 8, and one upper guide hole is a mistake-proofing hole, so that the positioning precision is ensured.

In this embodiment, the device further includes a first guide post 13, a second guide post 14 and a third guide post 15, bottom excircles of the first guide post 13, the second guide post 14 and the third guide post 15 are matched with the lower guide hole, and top excircles of the first guide post 13 and the third guide post 15 are matched with the upper guide hole.

Specifically, the number of the second guide pillars 14 is two, the top end excircle of the third guide pillar 15 is rhombic, and the top end excircle of the second guide pillar 14 is 0.5 mm-1 mm smaller than the upper guide hole of the upper drill jig plate, so that the upper drill jig plate 1 can be conveniently detached.

In this embodiment, the upper drill plate 1 is provided with an upper positioning hole, the upper drill bushing 4 is located in the upper positioning hole, the lower drill plate 7 is provided with a lower positioning hole, and the lower drill bushing 10 is located in the lower positioning hole.

Further, the lower drilling template 7 is provided with an orientation pin 16, so that the positioning accuracy is further ensured.

In this embodiment, the two ends of the middle of the lower drill plate 7 are provided with notch structures 17 to facilitate the assembly and disassembly of the pump casing 18 to be processed.

In summary, the hydraulic pump shell can be drilled from two ends in sequence, so that the technical problems that screw holes in the existing similar products are too far inclined and the interference assembly of the screws is not advanced are solved, the structure is simple, and the machining precision is high.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A pump shell screw hole drilling jig is characterized by comprising an upper layer assembly, a lower layer assembly and a guide post countersink drill; the upper-layer assembly comprises an upper drill plate, an upper supporting nail, an upper hexagon socket head cap screw, an upper drill bushing, a compression screw and a circular pressing plate, the number of the upper drill bushing is four, the upper drill bushing corresponds to four screw hole positions of a pump shell to be processed, the compression screw is located at the central position of the upper drill plate, the circular pressing plate is located on the compression screw, the lower-layer assembly comprises a lower drill plate, a lower supporting nail, a lower hexagon socket head cap screw, a lower drill bushing and a positioning mandrel, the number of the lower drill bushing is four, the lower drill bushing corresponds to four screw hole positions of the pump shell to be processed, the positioning mandrel is located at the central position of the lower drill plate, the positioning mandrel corresponds to the circular pressing plate, and a chamfering edge structure is arranged on the guide pillar drill.

2. The pump casing screw hole jig according to claim 1, wherein the upper jig plate is provided with upper guide holes, the lower jig plate is provided with lower guide holes, and the number of the upper guide holes and the number of the lower guide holes are four and correspond to one another.

3. A pump casing screw hole jig according to claim 2, wherein said upper guide hole is fitted with said upper support nail, said lower guide hole is fitted with said lower support nail, and one of said upper guide holes is a mistake-proofing hole.

4. The pump casing screw hole jig according to claim 2, further comprising a first guide post, a second guide post and a third guide post, wherein the outer circles of the bottom ends of the first guide post, the second guide post and the third guide post are matched with the lower guide hole, and the outer circles of the top ends of the first guide post and the third guide post are matched with the upper guide hole.

5. The pump casing screw hole jig according to claim 4, wherein the number of the second guide posts is two, the top end outer circle of the third guide post is rhombic, and the diameter of the top end outer circle of the second guide post is 0.5mm to 1mm smaller than the diameter of the upper guide hole of the upper jig plate.

6. The pump casing screw hole jig according to claim 1, wherein the upper jig plate is provided with an upper positioning hole, the upper drill bushing is located in the upper positioning hole, the lower jig plate is provided with a lower positioning hole, and the lower drill bushing is located in the lower positioning hole.

7. The pump casing screw hole jig according to claim 1, wherein an orientation pin is provided on the lower jig plate.

8. The pump casing screw hole jig according to claim 1, wherein a notch structure is provided at both end positions in the middle of the lower jig plate.