CN216643774U

CN216643774U - Bore bit shank lubricating mechanism and rock drill

Info

Publication number: CN216643774U
Application number: CN202220144700.8U
Authority: CN
Inventors: 吕桂梅; 赵振国; 刘建; 杨贵龙
Original assignee: Zhangjiakou Xuanhua Huatai Mining & Metallurgic Machinery Co ltd
Current assignee: Zhangjiakou Xuanhua Huatai Mining & Metallurgic Machinery Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-05-31
Anticipated expiration: 2032-01-19

Abstract

The utility model provides a drill shank lubricating mechanism and a rock drill, comprising a frame, wherein the frame is provided with a transmission cavity, a first lubricating channel, a second lubricating channel and a movable cavity; the transmission cavity is used for accommodating the rear part of the drill bit shank and the rotary transmission mechanism, the transmission cavity is communicated with the first lubricating channel, the inlet end of the second lubricating channel is communicated with the outlet end of the first lubricating channel, the drill bit shank penetrates through the movable cavity and extends out of the front end part of the frame, and the outlet end of the second lubricating channel is communicated with the movable cavity; a one-way valve is arranged in the second lubricating channel and is provided with a valve body and an elastic piece, and the valve body is used for being abutted against the inlet end of the second lubricating channel to realize plugging; the elastic piece is located at the downstream of the valve body and is configured with pretightening force for enabling the valve body to abut against the inlet end of the second lubricating channel. The utility model effectively avoids the problem of water inflow in the transmission cavity and avoids the corrosion, corrosion and damage of elements of the internal rotation and impact parts of the rock drill.

Description

Bore bit shank lubricating mechanism and rock drill

Technical Field

The utility model belongs to the technical field of mining equipment, and particularly relates to a drill shank lubricating mechanism and a rock drill.

Background

Rock drill is a tool for directly exploiting stone. It can drill blast holes in rock stratum to put explosive to blast rock, so as to complete the exploitation of stone or other stone engineering. Furthermore, rock drills may also be used as breakers for breaking hard layers such as concrete. Rock drills can be classified into pneumatic rock drills, internal combustion rock drills, electric rock drills, hydraulic rock drills and the like according to power sources of the rock drills. The hydraulic rock drill impacts a steel chisel through an impact body by means of hydraulic pressure, and rock chiseling is achieved. As one of important engineering equipments, a hydraulic rock drill is indispensable for engineering construction in the fields of mines, highways, buildings, and the like.

The rock drilling machine mainly comprises an impact mechanism and a rotary mechanism, the rotary mechanism mainly comprises a drill rod tail and a rotary transmission mechanism, the drill rod tail axially reciprocates under the action of the impact mechanism, and rotates under the action of the rotary transmission mechanism, so that rock drilling is realized. The axial movement of the drill bit tail and the operation of the rotary transmission mechanism need to be lubricated, and under the condition that oil gas of rock drilling equipment can not work normally or the rock drilling machine stops working, slag flushing water of the rock drilling machine or sewage in a hole drilling environment flows backwards through a lubricating channel and enters the interior of the rock drilling machine, so that the rotary part and the impact part of elements in the rock drilling machine are corroded and damaged.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a drill shank lubricating mechanism and a rock drill, aiming at avoiding water from entering a transmission cavity and avoiding corrosion, corrosion and damage of elements at the internal rotation and impact parts of the rock drill.

In order to achieve the purpose, the utility model adopts the technical scheme that:

in a first aspect, there is provided a shank adapter lubrication mechanism comprising:

the frame is provided with a transmission cavity, a first lubricating channel, a second lubricating channel and a movable cavity;

the transmission cavity is used for accommodating the rear part of the drill bit shank and the rotary transmission mechanism, the transmission cavity is communicated with the first lubricating channel, the inlet end of the second lubricating channel is communicated with the outlet end of the first lubricating channel, the drill bit shank penetrates through the movable cavity and extends out of the front end part of the frame, and the outlet end of the second lubricating channel is communicated with the movable cavity;

a one-way valve is arranged in the second lubricating channel and provided with a valve body and an elastic piece, and the valve body is used for being abutted against the inlet end of the second lubricating channel so as to realize plugging; the elastic piece is located at the downstream of the valve body and is configured with a pre-tightening force for enabling the valve body to abut against the inlet end of the second lubricating channel.

With reference to the first aspect, in one possible implementation manner, the inlet end of the second lubrication passage is formed with a limiting step, and the elastic member is disposed between the valve body and the limiting step.

With reference to the first aspect, in a possible implementation manner, the check valve further includes an annular valve body support, the valve body support is disposed at an inlet of the second lubrication passage, and the valve body support is formed with a butting ring extending toward an axis of the valve body support; when the valve body abuts against the abutting ring, the inlet of the second lubricating passage is in a closed state.

With reference to the first aspect, in a possible implementation manner, the abutting ring is located on a side of the valve body support away from the outlet end of the first lubrication passage.

With reference to the first aspect, in a possible implementation manner, an upstream side surface of the abutting ring is a diversion inclined surface, and a side of the diversion inclined surface, which deviates from the axis of the valve body support, inclines upstream.

With reference to the first aspect, in a possible implementation manner, the diversion inclined surface and the inner annular surface of the valve body support are in transition through a fillet.

With reference to the first aspect, in a possible implementation manner, the inlet end of the second lubrication passage is further formed with a mounting ring groove, the mounting ring groove is located upstream of the limiting step, and the valve body support is disposed inside the mounting ring groove.

With reference to the first aspect, in a possible implementation manner, the elastic member is a spring, one end of the spring abuts against the limiting step, and the other end of the spring abuts against the valve body.

With reference to the first aspect, in one possible implementation manner, an outer diameter of the valve body is smaller than an inner diameter of the second lubrication passage.

Compared with the prior art, the scheme shown in the embodiment of the application has the advantages that the lubrication medium is guided in through the first lubrication channel, the lubrication medium firstly enters the transmission cavity to lubricate the rotary transmission mechanism, then the lubrication medium flows out of the transmission cavity and enters the inlet of the second lubrication channel through the guide of the first lubrication channel, if the lubrication medium is continuously input, the pressure of the medium reaches a certain value, the lubrication medium pushes the valve body to move, the inlet of the second lubrication channel is gradually opened, and the lubrication medium can enter the movable cavity through the second lubrication channel to lubricate the front part of the frame; if the rock drill stops working, the lubricating medium stops conveying at the same time, and at the moment, the elastic piece pushes the valve body, so that the valve body blocks the inlet of the second lubricating channel again. The utility model provides a bore bit tail lubricating mechanism can reach the effective lubrication to transmission chamber and activity chamber, in the course of the work, because lubricated medium's pressure, sewage also can not enter into within the lubricated passageway of second, after the stop work, can also realize the shutoff to first lubricated passageway, has effectively avoided the problem of intaking in the transmission chamber, avoids the inside gyration of rock drill, the corrosion of impact part component, corruption and damage.

In a second aspect, the embodiment of the utility model also provides a rock drill, which comprises the drill shank lubricating mechanism.

Compared with the prior art, the scheme shown in the embodiment of the application effectively avoids the problem that the service life of the drill bit tail transmission structure is shortened due to water inlet corrosion, and prolongs the service life of the whole rock drill.

Drawings

FIG. 1 is a schematic view of an assembly structure of a drill shank lubricating mechanism provided by an embodiment of the utility model;

fig. 2 is an enlarged view of a portion a of fig. 1.

Description of reference numerals:

100. a frame; 120. a first lubrication channel; 130. a second lubrication channel; 131. a limiting step; 132. mounting a ring groove; 140. a movable cavity; 150. an oil drainage channel;

200. a one-way valve; 210. a valve body; 220. an elastic member; 230. a valve body support; 240. a butting ring; 241. a diversion bevel;

300. a drill shank;

400. a rotary transmission mechanism.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It should be noted that the terms "upstream" and "downstream" in this application refer to the flow path of the lubricating medium in the operating state, for example, the first lubricating passage 120 is located upstream of the second lubricating passage 130, and the rest of the description is similar.

Referring to fig. 1 and 2 together, the drill bit lubricating mechanism provided by the present invention will now be described. The drill bit lubricating mechanism comprises a frame 100, wherein a transmission cavity, a first lubricating channel 120, a second lubricating channel 130 and a movable cavity 140 are formed in the frame 100; the transmission cavity is used for accommodating the rear part of the drill rod shank 300 and the rotary transmission mechanism 400, the transmission cavity is communicated with the first lubricating channel 120, the inlet end of the second lubricating channel 130 is communicated with the outlet end of the first lubricating channel 120, the drill rod shank 300 penetrates through the movable cavity and extends out of the front end part of the frame 100, and the outlet end of the second lubricating channel 130 is communicated with the movable cavity 140.

A check valve 200 is arranged in the second lubricating channel 130, the check valve 200 is provided with a valve body 210 and an elastic piece 220, and the valve body 210 is used for abutting against the inlet end of the second lubricating channel 130 so as to realize blocking; the elastic member 220 is located downstream of the valve body 210 and is configured with a pre-load force that urges the valve body 210 against the inlet end of the second lubrication passage 130.

Compared with the prior art, the drill bit lubricating mechanism provided by the embodiment has the advantages that the introduction of the lubricating medium is realized through the first lubricating channel 120, the lubricating medium firstly enters the transmission cavity to lubricate the rotary transmission mechanism 400, then the lubricating medium enters the inlet of the second lubricating channel 130 through the diversion of the first lubricating channel 120 after flowing out of the transmission cavity, if the lubricating medium is continuously input, the pressure of the medium reaches a certain value, the lubricating medium pushes the valve body 210 to move, the inlet of the second lubricating channel 130 is gradually opened, and the lubricating medium can enter the movable cavity 140 through the second lubricating channel 130 to lubricate the front part of the frame 100; if the rock drill stops working, the lubricant stops being delivered at the same time, and at this time, the elastic member 220 pushes the valve body 210, so that the valve body 210 blocks the inlet of the second lubrication passage 130 again. The drill shank lubricating mechanism can effectively lubricate the transmission cavity and the movable cavity 140, sewage cannot enter the second lubricating channel 130 due to the pressure of a lubricating medium in the working process, and the first lubricating channel 120 can be plugged after the stop working, so that the problem of water inflow in the transmission cavity is effectively solved, and the internal rotation of a rock drill and the corrosion, corrosion and damage of an impact part element are avoided.

As shown in fig. 1 and fig. 2, the frame 100 in the present embodiment is exemplarily shown to be composed of a plurality of components, the frame 100 forms a foundation during operation, and the position of the shank 300 is changed relative to the position of the frame 100, but the specific structure of the frame 100 can meet the requirements of processing and assembling, and is not limited herein.

In this embodiment, the lubricating medium may be lubricating oil, lubricating oil mist, or the like, and the performance requirements of circulation and lubrication may be satisfied, which is not described herein again.

The rotary transmission mechanism 400 in this embodiment is exemplarily shown as a gear rotary transmission mechanism, and the transmission cavity is mainly used for accommodating a gear structure, and for convenience of operation, the shape of the transmission cavity generally substantially matches with the rotary transmission mechanism, and has a certain sealing property, so as to prevent a lubricating medium from leaking. It should be understood, however, that the rotary drive mechanism 400 may be any other mechanism that is capable of rotating the shank adapter 300 while allowing axial movement of the shank adapter 300, and is not limited thereto.

In some embodiments, not shown, the first lubrication passage 120 is divided into an inlet section and an outlet section, the inlet of the inlet section is in communication with an external delivery conduit for introducing the lubrication medium into the transmission chamber, the lubrication medium then flows out of the transmission chamber and into the outlet section, and the outlet of the outlet section is directly interfaced with the second lubrication passage 130.

Referring to fig. 1, the second lubrication channel 130 is a bent channel and includes a first section parallel to the front-rear direction and a second section perpendicular to the front-rear direction, an inlet of the first section is connected to an outlet of the first lubrication channel 120, an inlet of the second section is connected to an outlet of the first section, and an outlet of the second section is connected to the movable chamber 140. The second lubrication passage 130 has a simple structure and is convenient to manufacture, the circulation path of the lubrication medium is effectively shortened, and the circulation efficiency of the lubrication medium is improved.

In some embodiments, referring to fig. 1 and 2, to facilitate installation of the elastic member 220, the inlet end of the second lubrication passage 130 is formed with a limit step 131, and the elastic member 220 is disposed between the valve body 210 and the limit step 130. In a free state, the elastic member 220 pushes the valve body 210, so that the valve body 210 always keeps a state of blocking the inlet of the second lubrication channel 130; when the lubricating medium circulates, the valve body 210 presses the elastic member 220, the elastic member 220 contracts, and then the inlet of the second lubrication passage 130 is gradually opened.

In some embodiments, referring to fig. 1 and 2, the check valve 200 further includes an annular valve body support 230, the valve body support 230 is disposed at an inlet of the second lubrication passage 130, and the valve body support 230 is formed with an abutment ring 240 extending toward an axial center of the valve body support 230; when the valve body 210 abuts the abutment ring 240, the inlet of the second lubrication passage 130 is in a closed state. In this embodiment, the central hole of the abutting ring 240 serves as the actual inlet of the second lubricating channel 130, so that the abutting ring 240 can be flexibly designed according to the actual setting condition of the valve body 210, the valve body bracket 230 forms the basis for mounting the abutting ring 240, and the mounting convenience is improved.

In specific implementation, the abutting ring 240 and the valve body bracket 230 are coaxially arranged, so that the central holes of the abutting ring and the valve body bracket can be coaxial, and the circulation of a lubricating medium is facilitated.

In addition to the above embodiments, in order to further improve the smoothness of the medium flowing, the inner annular surface of the abutting ring 240 and the inner annular surface of the valve body holder 230 are provided with guide grooves corresponding to each other. The guide groove is favorable for enhancing the flowing directionality of the lubricating medium, reduces the generation of rotational flow and turbulent flow, then improves the flowing smoothness, and finally has positive influence on the lubrication efficiency.

In specific implementation, the plurality of guide grooves are distributed around the central axis of the valve body bracket 230, and each guide groove is parallel to the central axis of the valve body bracket 230.

To facilitate contact of the valve body 210 with the abutment ring 240, referring to fig. 1 and 2, the abutment ring 240 is located on a side of the valve body support 230 remote from the outlet end of the first lubrication passage.

In some embodiments, referring to fig. 1 and 2, in order to prevent the lubricating medium from accumulating on the upstream side of the abutting ring 240, the upstream side surface of the abutting ring 240 is a flow guiding inclined surface 241, and a side of the flow guiding inclined surface 241 facing away from the axial center of the valve body bracket 230 is inclined upstream.

On the basis of the above embodiment, referring to fig. 1 and fig. 2, the flow guiding inclined surface 241 is in rounded transition with the inner annular surface of the valve body support 230. Fillet transition is favorable to promoting the structural strength of valve body support 230 and butt ring 240 hookup location, avoids its fracture damage after using a period, can also further avoid lubricating medium's siltation simultaneously.

To facilitate the installation and positioning of the valve body bracket 230, referring to fig. 1 and 2, the inlet end of the second lubrication passage 130 is further formed with a mounting ring groove 132, the mounting ring groove 132 is located upstream of the limiting step 131, and the valve body bracket 230 is disposed in the mounting ring groove 132.

Referring to fig. 1 and 2, as an embodiment of the elastic member 220, the elastic member 220 is a spring, one end of the spring abuts against the limit step 131, and the other end abuts against the valve body 210.

Of course, the elastic member 220 may also be an elastic rubber ring or the like, which can satisfy the requirement of elastic expansion and contraction performance, and is not listed here.

In some embodiments, referring to fig. 1 and 2, the valve body 210 has an outer diameter that is smaller than an inner diameter of the second lubrication passage 130. In this embodiment, the inner diameter of the inner annular surface of the abutting ring 240 is smaller than the inner diameter of the second lubrication channel 130, and the size of the valve body 210 is selected to ensure that the upstream side surface thereof effectively blocks the central hole of the abutting ring 240, wherein the central hole of the abutting ring 240 forms an actual inlet; when the valve body 210 moves downstream, the central hole of the abutment ring 240 is opened, and the lubricating medium can continuously circulate through the gap between the valve body 210 and the second lubrication passage 130. The valve body 210 of the embodiment has a small and compact structure, and can effectively ensure the reliability of plugging and the smoothness of medium circulation when conducting.

In specific implementation, the shape of the valve body 210 may take the following forms:

1) as shown in fig. 1 and 2, the valve body 210 is a sphere, and the outer diameter of the valve body 210 is smaller than the inner diameter of the second lubrication channel 130 and larger than the inner diameter of the central hole of the abutting ring 240; on the premise of using a spring as the elastic member 220, the spherical structure is more favorable for positioning the elastic member 220, and the valve body 210 is ensured to be effectively contacted with the elastic member 220.

2) Not shown in the drawings, the valve body 210 is a cylinder (for example, a cylinder, a polygonal prism, or the like), the long axis of the valve body 210 is arranged parallel to the long axis of the second lubrication passage 130, the end surface of the shaft on the upstream side thereof serves as a blocking surface for abutting against the abutment ring 240, and the outer diameter of the valve body 210 is larger than the inner diameter of the center hole of the abutment ring 240 and smaller than the inner diameter of the second lubrication passage 130. One end of the elastic member 220 may be connected to the end surface of the shaft on the downstream side of the valve body 210 by hooking or the like, so as to ensure reliable positioning between the valve body 210 and the elastic member 220.

3) Not shown in the figure, the valve body 210 is a plate-shaped member, a through-flow through hole may be formed in the valve body 210, and the flow medium may flow through the through-flow through hole as well as through the gap between the valve body 210 and the second lubrication passage 130, thereby increasing the flow rate of the medium. On this basis, the downstream side surface of the abutment ring 240 may be provided with an insert corresponding to the flow through hole, and when in a closed state, the insert is inserted into the flow through hole to improve the sealing property.

The utility model provides a bore bit shank lubrication mechanism sets up the check valve structure on the lubricated passageway of rock drill front end, when the rock drill is worked, both guaranteed to come from independent oil-gas lubrication system's pressure oil gas, reach second lubricated passageway 120 department through first lubricated passageway 120, form effective oil-gas lubrication again in the fitting surface department of front end bore bit shank 300 and relative motion component, the gap discharge between rock drill bore bit shank 300 and the activity chamber 140 lateral wall after, take away the inside heat of rock drill, impurity such as the outside water dirt of rock drill, ash and slag entering rock drill inside has still been prevented and has been caused unfavorable factors such as pollution, wearing and tearing and corrosion.

Additionally, in some embodiments, referring to FIG. 1, a drain passage 150 is also formed in the frame 100 in communication with the transmission cavity. When the pressure oil gas is used, pressure oil gas from an independent oil gas lubrication system enters the transmission cavity through the first lubrication channel 110 of the frame 100, the oil gas reaches the matching surface of the relative motion element and the motion matching surface of the rear end of the drill bit shank 300 in the transmission cavity to form efficient lubrication, the oil gas lubrication on the rock drill belongs to open lubrication, the pressure oil gas is discharged out of the rock drill through the oil drainage channel 150, and heat generated by striking of the rear end of the drill bit shank 300 and heat generated by motion of the rotary element are taken away.

Based on the same inventive concept, the embodiment of the application also provides a rock drill which comprises the drill bit shank lubricating mechanism.

Compared with the prior art, the rock drill provided by the embodiment effectively avoids the problem that the service life of the drill bit tail transmission structure is shortened due to water inlet corrosion, and prolongs the service life of the whole rock drill.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A shank adapter lubricating mechanism, comprising:

2. The shank lubrication mechanism according to claim 1, wherein an inlet end of the second lubrication passage is formed with a stopper step, and the elastic member is interposed between the valve body and the stopper step.

3. The shank lubrication mechanism according to claim 2, wherein the check valve further includes an annular valve body holder provided at an inlet of the second lubrication passage, the valve body holder being formed with an abutment ring extending toward an axial center of the valve body holder; when the valve body abuts against the abutting ring, the inlet of the second lubricating passage is in a closed state.

4. The shank lubrication mechanism according to claim 3, wherein the abutment ring is located on a side of the valve body bracket remote from the outlet end of the first lubrication passage.

5. The shank lubrication mechanism according to claim 4, wherein an upstream side of the abutment ring is a guide slope, and a side of the guide slope facing away from an axial center of the valve body holder is inclined upstream.

6. The shank lubrication mechanism of claim 5, wherein the flow directing chamfer is radiused to the inner annular surface of the valve body carrier.

7. The shank lubrication mechanism according to claim 2, wherein the inlet end of the second lubrication passage is further formed with a mounting ring groove located upstream of the limit step, and the valve body bracket is disposed inside the mounting ring groove.

8. The shank lubrication mechanism according to claim 7, wherein the elastic member is a spring, one end of the spring abuts against the limit step, and the other end abuts against the valve body.

9. The shank lubrication mechanism according to claim 8, wherein an outer diameter of the valve body is smaller than an inner diameter of the second lubrication passage.

10. A rock drill comprising a shank lubrication mechanism according to any one of claims 1 to 9.