CN216238726U - Drill rod of hydraulic breaking hammer - Google Patents
Drill rod of hydraulic breaking hammer Download PDFInfo
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- CN216238726U CN216238726U CN202121752400.XU CN202121752400U CN216238726U CN 216238726 U CN216238726 U CN 216238726U CN 202121752400 U CN202121752400 U CN 202121752400U CN 216238726 U CN216238726 U CN 216238726U
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Abstract
The utility model provides a drill rod of a hydraulic breaking hammer, and belongs to the technical field of hydraulic breaking hammers. The drill rod solves the technical problems that the drill rod is provided with four chip grooves, the distance between the grooves is short, the structural strength of a drill bit of the drill rod is low, the drill bit is easy to short and sharp, and the like. The drill rod of the hydraulic breaking hammer comprises a drill body, wherein a drill bit is arranged at the front end of the drill body, a drill bit tail is arranged at the rear end of the drill body, a clamping groove is formed in the drill bit tail, two chip grooves are formed between the drill bit and the drill body and symmetrically arranged relative to the central axis of the drill body, and the chip grooves start at the middle part of the drill bit and are finally arranged at the middle part of the drill body. The drill rod is provided with the two symmetrical chip removal grooves, the distance between every two adjacent chip removal grooves is farther, and the drill rod is beneficial to increasing the structural strength of a drill bit on the premise of not influencing the normal chip removal of the drill rod, prolonging the service life of the drill rod and reducing the use cost; meanwhile, two chip grooves are reduced, the processing time can be reduced, and the manufacturing cost is favorably reduced.
Description
Technical Field
The utility model belongs to the technical field of hydraulic breaking hammers, and particularly relates to a drill rod of a hydraulic breaking hammer.
Background
The drill rod of the hydraulic breaking hammer is an essential part and a quick-wear part of the hydraulic breaking hammer, the hydraulic breaking hammer is called as the breaking hammer or the breaker for short, the hydraulic breaking hammer is mainly matched with a host machine such as a hydraulic excavator and the like for use, the power source of the hydraulic breaking hammer is the pressure provided by the excavator, a loader or a pump station, stones and rocks can be effectively broken in engineering construction, and the working efficiency is improved.
The hydraulic breaking hammer is a novel efficient hydraulic impact vibration machine tool, and a working machine outputs high-pressure oil to realize high-frequency reciprocating motion of a piston of the breaking hammer in a cylinder body during working, so that a drill rod at the front end is struck to do work outwards.
At present, hydraulic breaking hammer drill rods sold in the market mostly adopt an integral or split structure, alloy round steel is used as a main body, the head of the alloy round steel is processed into a straight shape, a cross shape, a pyramid shape, a cone shape and a blunt shape, if the patent number is 20122070762.8, the novel hydraulic breaking hammer drill rod is provided with a chip discharge groove (patent number ZL200620141560.X, the hydraulic breaking hammer drill rod), the tail of the alloy round steel is provided with a flat pin groove, and the alloy round steel is finished through heat treatment and has the characteristics of wear resistance, heat resistance, difficulty in breaking, difficulty in cracking and the like.
However, in the actual market situation, the overall hardness of the drill rod is higher or lower, the drill bit with lower overall hardness is seriously worn, the drill bit can be curled, the service time is short, the drill bit is brittle and broken soon after being used if the hardness is too high, the piston of the breaking hammer is roughened due to too high hardness of the tail of the drill rod, the cylinder body and the cylinder sleeve are worn, the drill rod is a vulnerable part, and the piston and the cylinder body are not vulnerable parts, so that serious economic loss can be caused; no matter the drill bit of the integral or split drill rod is short, the knocking contact surface is small, a large amount of heat and dust particles are generated during crushing operation, so that the head of the drill rod is quickly abraded, the service life of the drill rod is greatly shortened, and the crushing cost is increased.
In order to solve the problems, a drill rod is available in the market, and comprises a drill body, wherein the front end of the drill body is provided with a drill bit, and the tail end of the drill body is provided with a drill bit tail; a small cone frustum and a large cone frustum are formed at the position of a drill bit of the drill rod, four chip grooves are uniformly distributed between the large cone frustum and a drill body of the drill rod along the circumference, and the chip grooves start at the joint of the small cone frustum and the large cone frustum and are finally positioned on the outer circular surface of the drill body.
However, after the four chip removal grooves are formed in the drill rod, the distance between the grooves is short, the drill rod is easy to be short and sharp, and the use cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a drill rod with higher structural strength.
The purpose of the utility model can be realized by the following technical scheme:
the drill rod of the hydraulic breaking hammer comprises a drill body, wherein a drill bit is arranged at the front end of the drill body, a drill bit tail is arranged at the rear end of the drill body, and a clamping groove is formed in the drill bit tail, and the hydraulic breaking hammer is characterized in that: two chip grooves are arranged between the drill bit and the drill body, the chip grooves are symmetrically arranged about the central axis of the drill body, and the chip grooves start at the middle part of the drill bit and are finally arranged at the middle part of the drill body.
The drill rod of the hydraulic breaking hammer is provided with two symmetrical chip removal grooves, the distance between every two adjacent chip removal grooves is farther, and on the premise that the normal chip removal of the drill rod is not influenced, the structural strength of the drill bit is favorably improved, the service life of the drill rod is prolonged, and the use cost is reduced; meanwhile, two chip grooves are reduced, the processing time can be reduced, and the manufacturing cost is favorably reduced.
In the drill rod of the hydraulic breaking hammer, the distance between the bottom of the chip groove and the central axis of the drill rod is gradually increased from front to back.
On the basis that the groove bottom of the inclined chip groove can ensure the structural strength of the drill body, the inclined chip groove has better functions of dust particle removal and heat dissipation.
In the drill rod of the hydraulic breaking hammer, the drill bit comprises a small cone frustum, a middle cone frustum and a large cone frustum which are sequentially arranged from front to back, the large cone frustum is connected with the front end of the drill body, and the chip discharge groove is formed in the middle of the middle cone frustum.
The drill bit is formed by splicing a plurality of conical surfaces, and compared with a pyramid surface structure, the drill bit is lower in processing difficulty, more convenient to process, and better in crushing effect and wear resistance.
In the drill rod of the hydraulic breaking hammer, the taper angle alpha of the small frustum cone is larger than the taper angle beta of the middle frustum cone is larger than the taper angle gamma of the large frustum cone.
In the drill rod, the small cone platform firstly contacts with a crushed object, the drill bit is too sharp and easy to wear due to the fact that the cone angle alpha is too small, the drill bit is too blunt due to the fact that the cone angle alpha is too large, the crushing capability is not strong, therefore, the cone angle alpha of the small cone platform is generally controlled to be 30-60 degrees, and the cone angle alpha is optimal to be 55-60 degrees; the conical surfaces of the middle cone frustum and the large cone frustum are knocking surfaces and are main stress surfaces, the areas of the middle cone frustum and the large cone frustum are larger than that of the conical surface of the small cone frustum, the conical degrees of the middle cone frustum and the large cone frustum are smaller than that of the small cone frustum, the cone angle beta of the middle cone frustum is controlled between 15 degrees and 25 degrees generally, the cone angle beta is controlled between 15 degrees and 20 degrees optimally, the cone angle gamma of the large cone frustum is controlled between 5 degrees and 15 degrees generally, and the cone angle gamma is controlled between 9 degrees and 11 degrees optimally.
The contact area of the drill rod for knocking and crushing the medium and large conical tables is greatly increased, and the medium and large conical tables can well ensure the crushing of objects under the condition that the small conical tables are worn;
in the drill rod of the hydraulic breaking hammer, the chip groove is a tooth profile-shaped groove, and the bottom of the chip groove is provided with an arc-shaped connecting surface.
The chip groove can remove dust particles and small objects of the crushed objects and remove huge heat generated during crushing when the objects are crushed, so that the burning and abrasion of the drill bit are avoided, and the service life of the drill bit is prolonged;
in the drill rod of the hydraulic breaking hammer, the number of the clamping grooves is two, the two clamping grooves are symmetrically arranged about a central axis of the drill body, arc-shaped transition surfaces and anti-blocking surfaces are arranged at the front end and the rear end of each clamping groove, the height point of each anti-blocking surface is lower than the outer circle of the drill shank, and the transition surfaces are used for connecting the anti-blocking surfaces and the groove bottoms of the clamping grooves.
The clamping groove is assembled with the hydraulic breaking hammer, the arc-shaped transition surface is arranged between the clamping groove and the drill rod, the drill rod is conveniently clamped on the breaking hammer, and the transition surface can also ensure that cracks or fractures cannot be generated during heat treatment of the tail of the drill rod; the anti-jamming surface can make the drill rod fast assembled and fast disassembled during assembling and disassembling, and prevent jamming.
In the drill rod of the hydraulic breaking hammer, the hardness of the drill bit is HRC 50-54, and the hardness of the drill body and the drill bit shank is HRC 46-48.
The drill bit has high hardness, and the drill body and the drill shank have low hardness, so that the design can ensure better breaking capacity of the drill rod, can ensure that the drill body cannot abrade a cylinder body and a piston of the hydraulic breaking hammer, and can avoid the phenomenon of brittle failure when the drill bit is used.
Compared with the prior art, the utility model has the technical effects that:
the drill rod of the hydraulic breaking hammer is provided with two symmetrical chip removal grooves, the distance between every two adjacent chip removal grooves is farther, and on the premise that the normal chip removal of the drill rod is not influenced, the structural strength of the drill bit is favorably improved, the service life of the drill rod is prolonged, and the use cost is reduced; meanwhile, two chip grooves are reduced, the processing time can be reduced, and the manufacturing cost is favorably reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a longitudinal sectional view of the present invention.
Fig. 3 is a transverse cross-sectional view of the present invention.
Fig. 4 is a partial enlarged view at the card slot of the present invention.
In the figure, 1, a drill bit; 11. a small truncated cone; 12. a middle frustum; 13. a large frustum of a cone; 2. a shank; 3. a drill shank; 31. a card slot; 311. a transition surface; 312. anti-sticking surface; 4. a chip groove; 41. and (5) connecting the surface.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
The drill rod of the hydraulic breaking hammer comprises a drill body 2, a drill bit 1 is arranged at the front end of the drill body 2, a drill shank 3 is arranged at the rear end of the drill body 2, a clamping groove 31 is formed in the drill shank 3, two chip grooves 4 are formed between the drill bit 1 and the drill body 2, the chip grooves 4 are symmetrically arranged about a central axis of the drill body 2, and the chip grooves 4 are formed in the middle of the drill bit 1 and are finally formed in the middle of the drill body 2. The drill rod of the hydraulic breaking hammer is provided with two symmetrical chip removal grooves 4, the distance between every two adjacent chip removal grooves 4 is farther, and on the premise that the normal chip removal of the drill rod is not influenced, the structural strength of the drill bit 1 is favorably improved, the service life of the drill rod is prolonged, and the use cost is reduced; meanwhile, two chip grooves 4 are reduced, the processing time can be reduced, and the manufacturing cost is favorably reduced.
As shown in fig. 1-3, the distance between the bottom of the chip groove 4 and the central axis of the drill rod gradually increases from front to back; the chip groove 4 is a tooth profile-shaped groove, and the bottom of the chip groove 4 is provided with an arc-shaped connecting surface 41. The groove bottom of the inclined chip groove 4 can ensure the structural strength of the drill body 2, and has better functions of dust particle removal and heat dissipation; the chip groove 4 can remove dust particles and small objects of the broken objects and remove huge heat generated during breaking when the objects are broken, so that burning and abrasion of the drill bit 1 are avoided, and the service life of the drill bit 1 is prolonged.
In the drill rod of the hydraulic breaking hammer, the drill bit 1 comprises a small conical frustum 11, a middle conical frustum 12 and a large conical frustum 13 which are sequentially arranged from front to back, the large conical frustum 13 is connected with the front end of the drill body 2, and the chip discharge groove 4 is formed in the middle of the middle conical frustum 12; the taper angle alpha of the small cone frustum 11 is larger than the taper angle beta of the middle cone frustum 12 is larger than the taper angle gamma of the large cone frustum 13. The drill bit 1 is formed by splicing a plurality of conical surfaces, and compared with a pyramid surface structure, the drill bit is lower in processing difficulty, more convenient to process, and better in crushing effect and wear resistance; the small cone frustum 11 firstly contacts with the crushed object, the drill bit 1 is too sharp and easy to wear due to too small cone angle alpha, and the drill bit 1 is too blunt and weak in crushing capability due to too large cone angle alpha, so the cone angle alpha of the small cone frustum 11 is generally controlled to be 30-60 degrees, wherein the cone angle alpha is optimal to be 55-60 degrees; the conical surfaces of the middle conical frustum 12 and the large conical frustum 13 are knocking surfaces and are main stress surfaces, the areas of the two conical surfaces are larger than that of the conical surface of the small conical frustum 11, the conical degrees of the two conical surfaces are smaller than that of the small conical frustum 11, the cone angle beta of the middle conical frustum 12 is controlled to be 15-25 degrees generally, the cone angle beta is controlled to be 15-20 degrees optimally, the cone angle gamma of the large conical frustum 13 is controlled to be 5-15 degrees generally, and the cone angle gamma is controlled to be 9-11 degrees optimally. The contact area of the drill rod for knocking and crushing the middle cone table 12 and the large cone table 13 is greatly increased, and the middle cone table 12 and the large cone table 13 can also well ensure the crushed objects under the condition that the small cone table 11 is worn;
as shown in fig. 1, 2 and 4, there are two clamping grooves 31, the two clamping grooves 31 are symmetrically arranged about the central axis of the drill body 2, the front end and the rear end of each clamping groove 31 are provided with arc-shaped transition surfaces 311 and anti-clamping surfaces 312, the height point of the anti-clamping surface 312 is lower than the outer circle of the drill shank 3, and the transition surfaces 311 are used for connecting the anti-clamping surfaces 312 and the groove bottoms of the clamping grooves 31. The clamping groove 31 is assembled with the hydraulic breaking hammer, the arc-shaped transition surface 311 is arranged between the clamping groove 31 and the drill rod, the drill rod is conveniently clamped on the breaking hammer, and the transition surface 311 can also ensure that cracks or fractures cannot be generated during heat treatment of the tail of the drill rod; the anti-jamming surface 312 can make the drill rod fast assembled and fast disassembled during assembling and disassembling, and prevent jamming.
Furthermore, the hardness of the drill bit 1 is HRC 50-54, and the hardness of the drill body 2 and the drill bit shank 3 is HRC 46-48. The drill bit 1 is high in hardness, and the drill body 2 and the drill shank 3 are low in hardness, so that the design can ensure the better breaking capacity of a drill rod, can ensure that the drill body 2 cannot abrade a cylinder body and a piston of a hydraulic breaking hammer, and can avoid the brittle fracture phenomenon when the drill bit 1 is used.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes in the structure, shape and principle of the utility model are intended to be covered by the protection scope of the utility model as defined in the appended claims.
Claims (7)
1. The drill rod of the hydraulic breaking hammer comprises a drill body (2), a drill bit (1) is arranged at the front end of the drill body (2), a drill bit shank (3) is arranged at the rear end of the drill body (2), a clamping groove (31) is formed in the position of the drill bit shank (3), and the hydraulic breaking hammer is characterized in that: two chip grooves (4) are arranged between the drill bit (1) and the drill body (2), the chip grooves (4) are symmetrically arranged relative to the central axis of the drill body (2), and the chip grooves (4) start from the middle part of the drill bit (1) and are finally arranged at the middle part of the drill body (2).
2. A drill rod of a hydraulic breaking hammer according to claim 1, wherein: the distance between the bottom of the chip groove (4) and the central axis of the drill rod is gradually increased from front to back.
3. A drill rod of a hydraulic breaking hammer according to claim 2, wherein: the chip groove (4) is a tooth profile-shaped groove, and the bottom of the chip groove (4) is provided with an arc-shaped connecting surface (41).
4. A drill rod of a hydraulic breaking hammer according to claim 1, wherein: the drill bit (1) comprises a small cone frustum (11), a middle cone frustum (12) and a large cone frustum (13) which are sequentially arranged from front to back, the large cone frustum (13) is connected with the front end of the drill body (2), and the chip grooves (4) are formed in the middle of the middle cone frustum (12).
5. The drill rod of a hydraulic demolition hammer as set forth in claim 4, wherein: the taper angle alpha of the small cone frustum (11) is larger than the taper angle beta of the middle cone frustum (12) is larger than the taper angle gamma of the large cone frustum (13).
6. The drill rod of a hydraulic demolition hammer as claimed in any one of claims 1 to 5, characterized in that: the drill rod is characterized in that the number of the clamping grooves (31) is two, the two clamping grooves (31) are symmetrically arranged relative to a central axis of the drill rod body (2), arc-shaped transition surfaces (311) and anti-clamping surfaces (312) are arranged at the front end and the rear end of each clamping groove (31), the height point of each anti-clamping surface (312) is lower than the outer circle of the drill rod shank (3), and the transition surfaces (311) are used for connecting the anti-clamping surfaces (312) and the bottoms of the clamping grooves (31).
7. The drill rod of a hydraulic demolition hammer as claimed in any one of claims 1 to 5, characterized in that: the hardness of the drill bit (1) is HRC 50-54, and the hardness of the drill body (2) and the drill bit shank (3) is HRC 46-48.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752400.XU CN216238726U (en) | 2021-07-29 | 2021-07-29 | Drill rod of hydraulic breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752400.XU CN216238726U (en) | 2021-07-29 | 2021-07-29 | Drill rod of hydraulic breaking hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216238726U true CN216238726U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121752400.XU Active CN216238726U (en) | 2021-07-29 | 2021-07-29 | Drill rod of hydraulic breaking hammer |
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| Country | Link |
|---|---|
| CN (1) | CN216238726U (en) |
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2021
- 2021-07-29 CN CN202121752400.XU patent/CN216238726U/en active Active
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