CN212003867U

CN212003867U - Anti-falling assembly for retaining pin

Info

Publication number: CN212003867U
Application number: CN202020707004.4U
Authority: CN
Inventors: 王钟鼎; 李沙霖; 冷柏欣; 虞中清
Original assignee: Yantai Eddie Precision Machinery Co Ltd
Current assignee: Yantai Eddie Precision Machinery Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-11-24
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to a stopping round pin anti-falling subassembly, including expand set, expand tube, bolt and nut, the expand tube is located in the hole of expand set, the expand tube includes integrated into one piece's expand tube micro deformation section and expand tube deformation section, the expand set includes integrated into one piece's expand set micro deformation section and expand set deformation section, expand set deformation section with expand tube deformation section corresponds; the bolt is screwed into the expansion pipe from one end of the expansion pipe micro-deformation section and extends out of the expansion sleeve, the nut is in threaded connection with the rod part of the bolt, and when the bolt is continuously screwed, the nut can gradually enter inner holes of the expansion sleeve deformation section and the expansion pipe deformation section in sequence; after the installation of the drill rod of the breaking hammer is finished, the retaining pin assembly is preliminarily installed, the retaining pin assembly is plugged into the shell of the breaking hammer, then the bolt is screwed, the expanding tube is expanded through the screwing force, the expanding sleeve is forced to be fastened in the shell of the breaking hammer, and the purpose of preventing the retaining pin from falling is achieved.

Description

Anti-falling assembly for retaining pin

Technical Field

The utility model relates to an anti-drop subassembly, in particular to anti-drop subassembly is prevented to stopping round pin.

Background

The breaking hammer is a common engineering machine, and its basic principle is that it uses hydraulic energy to make piston implement reciprocating motion in cylinder sleeve so as to repeatedly hammer drill rod, and the drill rod can implement breaking function to crush cement building and road surface, etc.. The hydraulic breaking hammer has the advantages that the working environment is severe, the drill rod is frequently impacted, and the hydraulic breaking hammer is mainly fixed through the retaining pin after the drill rod is installed. In the prior art, the problem that the retaining pin falls off due to factors such as vibration and the like in the striking process of the breaking hammer cannot be solved, and the breaking hammer cannot normally work after the retaining pin falls off, so that the working efficiency is influenced, and potential safety hazards are generated; the prior art installs the rubber buffer in the one end of stopping round pin, and the stopping round pin mounting hole on the procapsid is the screw hole design, and the rubber buffer compression ratio is low, and locking effect is poor, and when the piston strikes the drill rod, the condition that the stopping round pin dropped often appears, influences the broken hammer and strikes the operation.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the not enough of above-mentioned prior art existence, provide a stopping round pin anti falling subassembly for hydraulic breaking hammer, can play better anti falling effect.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a retaining pin anti-falling assembly comprises an expansion sleeve, an expansion pipe, a bolt and a nut, wherein the expansion pipe is arranged in an inner hole of the expansion sleeve and comprises an expansion pipe micro-deformation section and an expansion pipe deformation section which are integrally formed;

the bolt is screwed into the expansion pipe from one end of the micro-deformation section of the expansion pipe and extends out of the expansion sleeve, the nut is in threaded connection with the rod part of the bolt, and when the bolt is continuously screwed, the nut can gradually enter the inner holes of the deformation section of the expansion sleeve and the deformation section of the expansion pipe in sequence.

Further, the outer end face of the expansion pipe micro-deformation section is flush with the outer end face of the expansion sleeve micro-deformation section, and the length of the expansion pipe is smaller than that of the expansion sleeve.

Further, the nut comprises a guide portion and an expansion portion which are integrally formed, the guide portion is in a cone frustum shape, the expansion portion is in a cylindrical shape, and the outer diameter of the large end of the guide portion is the same as that of the expansion portion.

Furthermore, a plurality of first elongated slots are arranged on the tube wall of the expansion tube deformation section, the direction of each first elongated slot is matched with the axial direction of the expansion tube, and one end of each first elongated slot is provided with an opening.

Further, the first long grooves are uniformly distributed along the circumferential direction of the pipe wall of the pipe expansion deformation section.

Furthermore, a plurality of second elongated slots are arranged on the sleeve wall of the expansion sleeve deformation section, the direction of the second elongated slots is matched with the axial direction of the expansion sleeve, and one end of each second elongated slot is provided with an opening.

Further, the second long grooves are uniformly distributed along the circumferential direction of the sleeve wall of the expansion sleeve deformation section.

Further, the appearance of the expansion sleeve is in a frustum shape, and the outer diameter of the deformation section of the expansion sleeve is gradually reduced from inside to outside.

Further, the expansion sleeve is made of a polyurethane material.

Further, a gasket and a washer are arranged between the head of the bolt and the outer end face of the expansion sleeve micro-deformation section.

The utility model has the advantages that: after the installation of the drill rod of the breaking hammer is finished, the stopping pin assembly is preliminarily installed, the stopping pin assembly is plugged into the shell of the breaking hammer, then the bolt is screwed, the nut continuously enters the expanding sleeve and the expanding pipe through the screwing force, the expanding pipe is finally expanded, the expanding sleeve is forced to be fastened in the shell of the breaking hammer, the purpose of preventing the stopping pin from falling is achieved, the expanding sleeve is made of polyurethane, and the stopping pin assembly has certain buffering performance and can effectively relieve the problem that the stopping pin falls off.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an exploded schematic view of the present invention;

fig. 3 is a schematic structural view of the middle expansion sleeve of the present invention;

fig. 4 is a schematic structural view of the middle expansion pipe of the present invention;

FIG. 5 is a schematic view of the present invention in a state when the breaking hammer is installed;

fig. 6 is a schematic view of the installation position of the breaking hammer of the present invention;

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-5, the anti-drop assembly for the retaining pin comprises an expansion sleeve 6, an expansion tube 5, a bolt 2 and a nut 7, wherein the expansion tube 5 is arranged in an inner hole of the expansion sleeve 6, the expansion tube 5 comprises an integrally formed expansion tube micro-deformation section 5-1 and an expansion tube deformation section 5-2, the expansion sleeve 6 comprises an integrally formed expansion sleeve micro-deformation section 6-1 and an expansion sleeve deformation section 6-2, and the expansion sleeve deformation section 6-2 corresponds to the expansion tube deformation section 5-2; the bolt 2 is screwed into the expansion pipe 5 from one end of the expansion pipe micro-deformation section 5-1 and extends out of the expansion sleeve 6, the nut 7 is in threaded connection with the rod part of the bolt 2, and when the bolt 2 is continuously screwed, the nut 7 can gradually enter inner holes of the expansion sleeve deformation section 6-2 and the expansion pipe deformation section 5-2 in sequence;

the nut 3 comprises a guide part 7-1 and an expansion part 7-2 which are integrally formed, the guide part 7-1 is in a shape of a truncated cone, the expansion part 7-2 is in a shape of a cylinder, and the outer diameter of the large end of the guide part 7-1 is the same as that of the expansion part 7-2.

Before the expansion sleeve deformation section 6-2 is not expanded, the outer diameter of the expansion part 7-2 is larger than the inner diameter of the expansion sleeve 6, and the whole expansion sleeve 6 enters the expansion pipe 5 along with the continuous screwing of the bolt 2 and finally enters the expansion pipe 5, so that the expansion pipe 5 is expanded.

The axial length of the expansion pipe 5 is smaller than that of the expansion sleeve 6, and the outer end face of the expansion pipe micro-deformation section 5-1 is flush with the outer end face of the expansion sleeve micro-deformation section 6-1;

the expansion sleeve 6 is made of polyurethane materials, a plurality of second long grooves 6-3 are formed in the sleeve wall of the expansion sleeve deformation section 6-2, and the direction of the second long grooves 6-3 is matched with the axial direction of the expansion sleeve 6. The expansion sleeve 6 is in a frustum shape, and the expansion sleeve deformation section 6-2 is a small-diameter section;

the pipe wall of the expansion pipe deformation section 5-2 is provided with a plurality of first long grooves 5-3, and the direction of the first long grooves 5-3 is matched with the axial direction of the expansion pipe 5.

And a gasket 3 and a washer 4 are also arranged between the head of the bolt 2 and the end surface of the large end of the expansion sleeve 6.

The utility model discloses a user state is shown in fig. 6, will in fig. 6 the utility model discloses with the mode display of explosion chart, be equipped with stopping round pin mounting hole 1-11 on procapsid 1-1 of quartering hammer 1, the utility model discloses install the outer end of stopping round pin mounting hole 1-11 to the both ends of shutoff stopping round pin prevent that it from dropping.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The anti-falling assembly of the retaining pin is characterized by comprising an expansion sleeve, an expansion pipe, a bolt and a nut, wherein the expansion pipe is arranged in an inner hole of the expansion sleeve and comprises an integrally formed expansion pipe micro-deformation section and an integrally formed expansion pipe deformation section;

the bolt is screwed into the expansion pipe from one end of the expansion pipe micro-deformation section and extends out of the expansion sleeve, the nut is in threaded connection with the rod part of the bolt, and the nut can enter inner holes of the expansion sleeve deformation section and the expansion pipe deformation section.

2. The anti-drop assembly of the retaining pin as claimed in claim 1, wherein the outer end face of the expander micro-deformation section and the outer end face of the expander micro-deformation section are flush, and the length of the expander is less than the length of the expander.

3. The anti-drop assembly of claim 2, wherein the nut comprises a guide portion and an expanding portion which are integrally formed, the guide portion has a truncated cone shape, the expanding portion has a cylindrical shape, and an outer diameter of a large end of the guide portion is the same as an outer diameter of the expanding portion.

4. The anti-drop assembly of the retaining pin as claimed in claim 1, wherein a plurality of first elongated slots are formed on the tube wall of the tube expansion deformation section, the direction of the first elongated slots is matched with the axial direction of the tube expansion, and one end of each first elongated slot is provided with an opening.

5. The anti-drop assembly of claim 4, wherein the first plurality of elongated slots are evenly spaced along a circumference of a wall of the expander deformation section.

6. The retaining pin anti-drop assembly according to claim 1, wherein a plurality of second elongated slots are formed in a sleeve wall of the expansion sleeve deformation section, the direction of the second elongated slots is matched with the axial direction of the expansion sleeve, and one end of each second elongated slot is open.

7. The anti-drop assembly of claim 6, wherein the second elongated slots are evenly spaced along a circumference of a sleeve wall of the expanding sleeve deforming section.

8. The anti-drop assembly of claim 1, wherein the expansion sleeve is tapered in shape and the deformed section of the expansion sleeve is a small diameter section.

9. The anti-drop assembly of a retaining pin according to any one of claims 1 to 8, wherein the expansion sleeve is of a polyurethane material.

10. The backing pin anti-drop assembly of any of claims 1-8, wherein a washer and a washer are further provided between the head of the bolt and the outer end face of the expansion sleeve micro-deformation section.