CN207260971U - Primary speed-down component and the oild chuck formula drill rod grip device for installing the component - Google Patents

Primary speed-down component and the oild chuck formula drill rod grip device for installing the component Download PDF

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Publication number
CN207260971U
CN207260971U CN201721038078.8U CN201721038078U CN207260971U CN 207260971 U CN207260971 U CN 207260971U CN 201721038078 U CN201721038078 U CN 201721038078U CN 207260971 U CN207260971 U CN 207260971U
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slips
component
slide mass
disc spring
primary speed
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文新国
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Shaanxi Sida Explosion-Proof Safety Polytron Technologies Inc
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Shaanxi Sida Explosion-Proof Safety Polytron Technologies Inc
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Abstract

The utility model discloses the oild chuck formula drill rod grip device for being provided with primary speed-down component to include primary speed-down component and power chuck component, power chuck component unloads mount components and normally closed clamping component including axially setting gradually thrust along hollow shaft, normally closed clamping component includes disc spring, slide mass and slips body, slips body is embedded on hollow shaft axial wall, slide mass is bonded setting with slips along the conical surface, disc spring is held out against in one end of slide mass ensures slips in axial enclasping force, and thrust is unloaded mount components and held out against in the other end of slide mass provides unloading force to slips.The adjustment that the primary speed-down component of the utility model passes through the fast ratio between two gears, reducing gear simple in structure and practical is obtained, it is suitable for drill rod grip device use, make the present apparatus while efficiency is improved, the service life of all parts in device can be improved, has the characteristics that service life is long, failure rate is low, maintenance is easy, cost-effective.

Description

Primary speed-down component and the oild chuck formula drill rod grip device for installing the component
Technical field
Drilling equipment field is the utility model is related to, is the power part of colliery tunnel deep hole rig, is specially level-one Deceleration member and the oild chuck formula drill rod grip device for installing the component.
Background technology
With the continuous development of coal mining technology, the underground drill rig technology in colliery is constantly ripe, and fixed churn is set It is standby to be substituted by track-mounted drill.The core of caterpillar drilling machine is the power head part of drilling machine punching, and power head is mainly Drilling rod provides turning moment, and drilling machine provides motive force in itself, and drill bit is installed on drilling rod, in the common of motive force and turning moment Destructive power is formed to rock under effect, so as to form continuous boring capacity.
Current driving force head mainly has the drive form of drilling rod two kinds, and one kind is directly connected for drilling rod with power head by screw thread Connect, this form is safe and reliable, but every dozen of complete drilling rods supplement drilling rod after just needing dismounting drilling rod, and work efficiency is relatively low Under;Another to clamp drilling rod by hydraulic pressure for power head, clamping force forms frictional force to drive drilling rod to rotate, this knot The advantage of structure is that continuously supplement compares drilling rod so as to be formed behind power head with regard to that can supplement drilling rod without dismounting drilling rod Continuous bore operation process, its efficiency significantly improve, its shortcoming is very short for the damage cycle of built-in component.
The content of the invention
For in the prior art the defects of and deficiency, the utility model provide primary speed-down component and the component be installed Oild chuck formula drill rod grip device, while work efficiency is improved, improves the service life of device.
To reach above-mentioned purpose, the technical solution that the utility model is taken includes:
The fast ratio of primary speed-down component, including first gear and second gear, first gear and second gear is 91/18= 5.06。
Specifically, the module of first gear and second gear is 5;First gear and second gear are using efficiently oblique Gear, efficient helical gear helix angle are 8 °.
The oild chuck formula drill rod grip device of the primary speed-down component, including the primary speed-down structure are installed Part and power chuck component, power chuck component unload mount components and normally closed clamping structure including axially setting gradually thrust along hollow shaft Part, thrust unload the drive end that mount components are located at hollow shaft, and normally closed clamping component is located at the driven end of hollow shaft;
Normally closed clamping component includes disc spring, slide mass and slips body, and slips body is coaxially embedded in hollow shaft axial wall, sliding Body is bonded along the conical surface with slips body and is arranged, and disc spring is held out against in one end of slide mass ensures slips body in axial enclasping force, thrust Unload mount components the other end of slide mass hold out against give slips provide unloading force.
Specifically, the slide mass carries the cylindrical member of disc spring erecting bed for outer wall, set on disc spring erecting bed Disc spring installation position, the inner wall of slide mass are the slips binding face of taper, taper big mouth of the disc spring erecting bed close to slips binding face End is coaxially disposed, and disc spring carries out holding out against for slide mass in the osculum end end face of disc spring erecting bed and the taper surface of slide mass at the same time;
Best, the width of the disc spring erecting bed is the 2~3 of the osculum end end face width of the taper surface of slide mass Times, the taper angle of the slips binding face of slide mass is 16~32 °.
Specifically, the slips body includes slips and check ring, slips is right-angled trapezium component, the taper surface of slips For binding face, the right-angle surface of slips holds face tightly for alloy, hard alloy blocks is set side by side with alloy holding face, and embrace in alloy Circumferentially arranged check ring installation position on tight face;
Set on the binding face of slips multiple in conplane boss;
It is 8~16 ° that slide mass is bonded the taper angle set along the conical surface with slips body.
Best, the hollow shaft axis wall thickness of the hollow shaft axis wall thickness h1 of slips body installation end and non-slips body installation end The thickness difference of h2 is 9~11mm.
Specifically, it is hydraulic cylinder and piston body that thrust, which unloads mount components, the displacement of piston body is the phase of slide mass and slips Power is provided to mobile, the stroke distances of hydraulic cylinder are less than the distance of the total deformation of disc spring.
Further, further include slips end cap, disc spring is arranged between slips end cap and slide mass, make slide mass along bore to Slips is held out against, slips holddown spring baffle ring provides enclasping force to drilling rod.
Further, shell is further included, dustproof cover, dustproof cover and shell composition clamping component are also set up outside slips end cap Housing, the housing of clamping component is connected with hydraulic cylinder, and turning sleeve and ball bearing are also set up between piston body and slide mass.
Compared with prior art, it is the advantages of the utility model:
The primary speed-down component of the utility model by the adjustment of the fast ratio between two gears, obtained it is simple in structure and Practical reducing gear, is suitable for drill rod grip device use, and the oild chuck component of the utility model, passes through component inside The adjustment of position relationship between all parts, the setting of the specific structural details of all parts, makes the present apparatus improve efficiency While, the service life of all parts in device can be improved, has that service life is long, failure rate is low, maintenance is easy, cost performance The characteristics of high.
Brief description of the drawings
Fig. 1 is the front view of the oild chuck formula drill rod grip device of the installation primary speed-down component of the utility model;
Fig. 2 is the sectional view of the A-A of Fig. 1;
Fig. 3 is the top view of the oild chuck formula drill rod grip device of the installation primary speed-down component of the utility model;
Fig. 4 is the sectional view of the B-B of Fig. 3;
Each label is expressed as in figure:1- power chucks component, 11- power chucks shell, 12- hydraulic cylinders, 13- pistons Body, the first ball bearings of 14-, 15- turning sleeves, 16- slide masses, 17- disc springs, 18- slips end cap, 19- dustproof covers, 110- slips, 2- primary speed-downs component, 21- first gears, 22- second gears, 23- primary speed-downs component enclosure, the second ball bearings of 24-, 25- Hollow shaft end cap, 26- primary speed-down component enclosures end cap, 3- motors, 4- hollow shafts;
The utility model is illustrated below in conjunction with specification drawings and specific embodiments.
Embodiment
The primary speed-down component of the utility model includes the speed of first gear and second gear, first gear and second gear Than for 91/18=5.06, the module of first gear and second gear is 5;Best, first gear and second gear are adopted With efficient helical gear, efficient helical gear helix angle β=8 °.
A kind of feasible scheme, the rotation of control first gear is connected by power part (motor) with first gear, the Two gears are engaged with first gear, and second gear is connected with component to be controlled, and the transmission of first gear and second gear, which is realized, to be treated The deceleration transmission of control unit.
Being provided with the oild chuck formula drill rod grip device of primary speed-down component includes primary speed-down component and power chuck Component, a kind of feasible connection mode is, including hollow shaft, and primary speed-down component and power card are axially set gradually along hollow shaft Disk component, the first gear of primary speed-down component are driven by motor, and second gear is coaxially installed on the outer wall of hollow shaft, are moved Power chuck member includes axially setting gradually thrust along hollow shaft and unloading mount components and normally closed clamping component, passes through first gear and the Two gears are transmitted after the slewing rate from motor is slowed down by hollow shaft, drive hollow shaft and normally closed clamping component one Rise and rotate.
Normally closed clamping component includes disc spring, slide mass and slips body, and slips body is coaxially embedded in hollow shaft axial wall, herein It is that slips body is embedded in the position of the non-end of hollow shaft, most people that described slips body, which is embedded represented in hollow shaft axial wall, Think, slips body, which is not arranged in end, can bring the problem of process is complicated and dismounting is inconvenient, and in fact, inventor is by grinding Study carefully discovery, be not arranged in end, will not only increase manufacture cost, simultaneously because the harmony that structure is mutual, such as it is empty Mandrel can preferably be protected to slips body, and slips body can reduce the radial direction lossy to end structural pipe wall in itself, both coordinate Increase the service life of all parts afterwards, reduce production cost on the contrary;Slide mass is bonded along the conical surface with slips body and is arranged, disc spring Held out against in one end of slide mass and ensure that slips unloads mount components and held out against in the other end of slide mass to card in axial enclasping force, thrust Watt provide unloading force.The setting of this structure, the lasting normally closed clamping to drilling rod is realized under the conditions of the holding out against of disc spring, is only existed When replacing drilling rod or drilling rod being unloaded, just need thrust to unload the work of mount components, therefore, improve push away to a certain extent Power unloads the service life of mount components;
Best, thrust unloads the drive end that mount components are located at hollow shaft, i.e., dynamic positioned at hollow shaft and motor or gear reducer etc. The connecting pin of power component, normally closed clamping component are located at the driven end of hollow shaft, and the benefit so set is the power of high-speed rotation Component unloads mount components (such as hydraulic cylinder) direct neighbor with the relatively simple thrust of structure, due to the process to work in power part In, thrust unloads mount components and never works, will not be to power part so thrust unloaded mount components are disposed adjacent with power part The work of part has an impact, and the work of drilling rod will not be had an impact, and by reasoning unload mount components by power part with often Clamping component interval is closed, two courses of work for clamping and rotating are separated to a certain extent, make two courses of work one Determine in degree separation while also correlation, ensure that the stability that disc spring is held out against, the design of this spline structure is inventor in reality Summarize and obtain in the course of work on border, and such conclusion for being drawn by substantial amounts of contrast experiment, inventor is repeatedly Test thrust and unloaded mount components and the connection relation of normally closed clamping component and power part, find power part, thrust unloading structure The course of work that part and normally closed clamping component three are successively set in hollow shaft is most smooth, and will not produce shadow between each other Ring, can not only cooperate what the course of work of all parts cooperateed with, while ensure that the independence of all parts, certain The working loss of reduction in degree, adds the service life of component.
With reference to Fig. 3, slide mass carries the cylindrical member of annular convex platform for outer wall, and annular convex platform is disc spring erecting bed, dish Disc spring installation position is set on spring erecting bed, and the inner wall of slide mass is taper surface, i.e. slips binding face, and disc spring erecting bed is close to slips The taper surface big opening end of binding face is coaxially disposed, and disc spring is at the same time in the osculum end end face of disc spring erecting bed and the taper surface of slide mass Carry out holding out against for slide mass;The position relationship of disc spring and slide mass, has a mistake held out against equivalent to the entirety to slide mass Journey, makes the setting of disc spring in irregular shape, is set according to the shape of slide mass outer wall, compared to only to the disc spring peace of slide mass The structure that dress platform part is held out against, the pressure bigger not only integrally held out against, is additionally, since point of the power of disc spring irregular structure Dissipate, while improve the service life of disc spring and the service life of slide mass.
Best, it is experimentally confirmed, the width of disc spring erecting bed is the osculum end end face width of the taper surface of slide mass 2~3 times, the taper angle of the slips binding face of slide mass is 16~32 °.The setting of such size and angle, can not only make Frictional force during slide mass is bonded with slips is minimum, while also ensures the maximum of the position relationship between disc spring and slide mass The extension that the service life for ensureing both in degree is tried one's best;
With reference to Fig. 4, slips is the component similar to right-angled trapezium, and the taper surface of slips is binding face, best, binding face It is upper to carry multiple boss, increase the frictional force of binding face, the right-angle surface of slips holds face tightly for alloy, and alloy holding is set side by side on face Hard alloy blocks, and the circumferentially arranged check ring installation position on alloy holding face are equipped with, check ring is set for card;
The taper angle of slips is 8~16 °, and the taper angle of the slips binding face of slide mass coordinates the taper angle of slips to set, Direction on the contrary, make slide mass be bonded with slips during frictional force it is minimum, it is mutual to reduce by two components fitted closely Abrasion, it is further provided the service life of component;The hollow shaft axis wall thickness h1 of slips body installation end is installed with non-slips body The thickness difference of the hollow shaft axis wall thickness h2 at end is 9~11mm, it is ensured that the contact surface of slips and hollow shaft axial wall is not less than 70%, ensure the fastness that slips is set, while slips is protected be subject to hollow shaft to a certain extent, is increased it and is used the longevity Life.
It is hydraulic cylinder and piston body that thrust, which unloads mount components, and the displacement of piston body is the mobile offer power of slide mass, liquid The stroke distances of compressing cylinder are less than the distance of the total deformation of disc spring, avoid damage and the Hydraulic System Fever of oil cylinder.
The present apparatus further includes slips end cap, and disc spring is arranged between slips end cap and slide mass, slide mass edge is bored to top Tight slips, slips holddown spring baffle ring provide enclasping force to drilling rod.
In addition, further including shell, dustproof cover, the shell of dustproof cover and shell composition clamping component are also set up outside slips end cap Body, the housing of clamping component are connected with hydraulic cylinder, and turning sleeve and ball bearing, turning sleeve are also set up between piston body and slide mass Radial constraint can be carried out to ball bearing, less ball bearing moves radially the parts damages brought.
Operation principle is:Disc spring provides clamping force on chuck, and clamped condition is long closed state, i.e. slips is clamped condition, Clamping force forms frictional force and transmits moment of torsion.Hydraulic cylinder provides dechucking forces, by the conical surface of slide mass and the mutual wedge of slips into formation Dechucking forces, at this time slide mass move up, disc spring is compressed, slips check ring hold out against effect under move radially outward, block Orostachys fimbriatus drives the drilling rod of clamping, realizes the unloading of drilling rod.Slips can rotate at a high speed after clamping drilling rod, so as to form boring action.Add After tight drilling rod can fair speed rotation, also can low speed rotation.High-speed rotating component includes:Hollow shaft, turning sleeve, sliding Body, slips upper cover, slips, dustproof cover and the disc spring of front end.Dustproof cover play the guiding role for installation drilling rod and bore operation When centralizing function.
Embodiment one:
The design output torque for being provided with the oild chuck formula drill rod grip device of primary speed-down component 2 is 4000N.m.
3.1. power section, power section can be equipped with the variable displacement motor that discharge capacity is 200ml/r or 225ml/r.200ml/r Parameters of hydraulic motor:0~200ml/r of discharge capacity, can limit 50~200ml/r of discharge capacity, rated pressure 40MPa;
3.2. reducing gear, reducing gear are primary speed-down component 2, including intermeshing 21 and second tooth of first gear The fast ratio of wheel 22, first gear 21 and second gear 22 is 91/18=5.06,22 module of first gear 21 and second gear For 5, first gear 21 and second gear 22 are efficient helical gear, and helical gear helix angle is 8 °, and small helix angle is full In the case that lumping weight is right, reduce axial force as far as possible.
3.3 oild chuck components, oild chuck component include hollow shaft 4, and thrust unloading is set gradually along hollow shaft 4 is axial Component and normally closed clamping component, thrust unload the drive end that mount components are located at hollow shaft 4, and normally closed clamping component is located at hollow shaft 4 Driven end;
Primary speed-down component 2 and power chuck component 1 are set gradually along hollow shaft 4 is axial, the first of primary speed-down component 2 Gear 21 is driven by motor 3, and second gear 22 is coaxially installed on the outer wall of hollow shaft 4, drives hollow shaft 4 and power card Rotary part on disk component 1 rotates, and primary speed-down component 2 includes first gear 21, second gear 22, outside primary speed-down component Shell 23, the second ball bearing 24, hollow shaft end cap 25 and primary speed-down component enclosure end cap 26.Primary speed-down component enclosure 23 passes through Three the second ball bearings of row 24 are rotatablely connected with hollow shaft 4, and primary speed-down component enclosure end is set gradually close to the end of hollow shaft 4 Lid 26 and hollow shaft end cap 25, second gear 22 are coaxially fixed on 4 outer wall of hollow shaft and are located at primary speed-down component enclosure 23 Interior, first gear 21 is sequentially connected with motor 3, and first gear 21 is engaged with second gear 22.
Normally closed clamping component includes disc spring 17, slide mass 16 and slips body, slips body be embedded in 4 axial wall of hollow shaft (away from Have a certain distance from 4 end of hollow shaft, which is about the 1/3~1/2 of slips height), slide mass 16 and slips body edge Conical surface fitting is arranged, and disc spring 17 holds out against the enclasping force for ensureing slips body in axial direction to drilling rod in one end of slide mass 16, and thrust is unloaded Mount components hold out against the drilling rod offer unloading force held tightly to slips body in the other end of slide mass 16.
With reference to Fig. 3, slide mass 16 carries the cylindrical member of annular convex platform for outer wall, and annular convex platform is disc spring erecting bed, Disc spring installation position is set on disc spring erecting bed, and the inner wall of slide mass 16 is taper surface, i.e. slips binding face, and disc spring erecting bed is close The taper surface big opening end of slips binding face is coaxially disposed, and disc spring 17 is at the same time in the small of the taper surface of disc spring erecting bed and slide mass 16 Mouth end end face carries out holding out against for slide mass 16;The width of disc spring erecting bed is wide for the osculum end end face of the taper surface of slide mass 16 2 times of degree, the taper of the slips binding face of slide mass 16 is 16.4 °.
With reference to Fig. 4, slips 110 is the component similar to right-angled trapezium, and the taper surface of slips 110 is binding face, best, Multiple boss are carried on binding face, increase the frictional force of binding face, the right-angle surface of slips holds face tightly for alloy, on alloy holding face Hard alloy blocks, and the circumferentially arranged check ring installation position on alloy holding face are set side by side with, spring catch is set for card Circle;
Conicity angles alpha=8.2 ° of slips 8, the taper angle angle of the taper angle of slips 8 and the slips binding face of slide mass 16 Identical, direction is opposite;The hollow shaft axis wall thickness of the hollow shaft axis wall thickness h1 of slips body installation end and non-slips body installation end The thickness difference of h2 is 10.5mm, wall thickness 35mm at thickening, does not thicken place wall thickness 24.5mm, and increase wall thickness can extend slips in groove The stroke of slip, play the guiding role;It can ensure that the contact surface of slips and hollow shaft axial wall is not less than 70%, ensure that slips is set Fastness.
Thrust, which unloads mount components, includes hydraulic cylinder 12 and piston body 13, and the displacement of piston body 13 is carried to the movement of slide mass 16 For power, the stroke distances of hydraulic cylinder 12 are less than the distance of the total deformation of disc spring 17, avoid damage and the hydraulic pressure system of oil cylinder System fever.
Slips end cap 18 is further included, disc spring 17 is arranged between slips end cap 18 and slide mass 16, makes slide mass 16 along cone To slips 110 is held out against, 110 holddown spring baffle ring of slips provides enclasping force to drilling rod.
Further include power chuck shell 11, also set up dustproof cover 19 outside slips end cap 18, dustproof cover 19 with outside power chuck Shell 11 forms the housing of clamping component, and the housing of clamping component is connected with hydraulic cylinder 12, between piston body 13 and slide mass 16 Also setting up 15 and first ball bearing 14 of turning sleeve, turning sleeve 15 can carry out the first ball bearing 14 radial constraint, and less first Ball bearing 14 moves radially the parts damages brought.
The hardness of slips 110 uses nitrogen treatment using the ordinary hard after quenched, slide mass 16, and hardness is more than HV500, One hard one soft stress allows soft part deformation, prevents from very stiff and demanding making equipment integrally damage.Disc spring 17 is 29, the model of disc spring 17 For disc spring outside diameter × disc spring internal diameter=50 × 25.4~4.1 (mm), friction coefficient μ=0.5 between hard alloy blocks and drilling rod, Clamping drill pipe diameter is two kinds of specifications of φ 73mm and φ 89mm.The stroke of hydraulic cylinder is 26mm, the pressing time-varying of single disc spring Shape amount is 1.1mm, so the total deformation of disc spring is:29 × 1.1=31.9mm.

Claims (9)

1. the oild chuck formula drill rod grip device of primary speed-down component is installed, it is characterised in that including primary speed-down component (2) and power chuck component (1), the thrust that power chuck component (1) includes axially setting gradually along hollow shaft (4) unload mount components With normally closed clamping component, thrust unloads the drive end that mount components are located at hollow shaft (4), and normally closed clamping component is located at hollow shaft (4) Driven end;
Normally closed clamping component includes disc spring (17), slide mass (16) and slips body, and slips body is coaxially embedded in hollow shaft (4) axial wall Interior, slide mass (16) is bonded with slips body along the conical surface to be arranged, and disc spring (17) is held out against in one end of slide mass (16) ensures slips body In axial enclasping force, thrust is unloaded mount components and held out against in the other end of slide mass (16) provides unloading force to slips body;
Primary speed-down component (2) includes the first gear (21) and second gear (22) of engagement, first gear (21) and the second tooth The fast ratio for taking turns (22) is 91/18=5.06.
2. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that The module of first gear (21) and second gear (22) is 5;First gear (21) and second gear (22) are using efficient Helical gear, efficient helical gear helix angle are 8 °.
3. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that The slide mass (16) carries the cylindrical member of disc spring erecting bed for outer wall, and disc spring installation position is set on disc spring erecting bed, The inner wall of slide mass (16) is the slips binding face of taper, and disc spring erecting bed is coaxially set close to the taper big opening end of slips binding face Put, disc spring (17) while holding out against in the osculum end end face of disc spring erecting bed and the taper surface of slide mass progress slide mass (16).
4. the oild chuck formula drill rod grip device as claimed in claim 3 for being provided with primary speed-down component, it is characterised in that The width of the disc spring erecting bed is 2~3 times of the osculum end end face width of the taper surface of slide mass, the card of slide mass (16) The taper angle of watt binding face is 16~32 °.
5. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that The slips body includes slips (110) and check ring, and slips (110) is right-angled trapezium component, the taper surface of slips (110) For binding face, the right-angle surface of slips (110) holds face tightly for alloy, is set side by side with hard alloy blocks on alloy holding face, and Circumferentially arranged check ring installation position on alloy holding face;
Set on the binding face of slips (110) multiple in conplane boss;
It is 8~16 ° that slide mass (16) is bonded the taper angle set along the conical surface with slips body.
6. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that The thickness difference of the hollow shaft axis wall thickness h2 of the hollow shaft axis wall thickness h1 of slips body installation end and non-slips body installation end for 9~ 11mm。
7. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that Thrust, which unloads mount components, includes hydraulic cylinder (12) and piston body (13), and the displacement of piston body (13) is to slide mass (16) and slips (110) relative movement provides power, and the stroke distances of hydraulic cylinder (12) are less than the distance of the total deformation of disc spring (17).
8. the oild chuck formula drill rod grip device as claimed in claim 1 for being provided with primary speed-down component, it is characterised in that Slips end cap (18) is further included, disc spring (17) is arranged between slips end cap (18) and slide mass (16), makes slide mass (16) edge Bore to slips (110) is held out against, slips (110) holddown spring baffle ring provides enclasping force to drilling rod.
9. the oild chuck formula drill rod grip device as claimed in claim 7 for being provided with primary speed-down component, it is characterised in that Further include power chuck shell (11), also set up dustproof cover (19) outside slips end cap (18), dustproof cover (19) with outside power chuck Shell (11) forms the housing of clamping component, and the housing of clamping component is connected with hydraulic cylinder (12), piston body (13) and slide mass (16) turning sleeve (15) and ball bearing are also set up between.
CN201721038078.8U 2017-08-18 2017-08-18 Primary speed-down component and the oild chuck formula drill rod grip device for installing the component Active CN207260971U (en)

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CN201721038078.8U CN207260971U (en) 2017-08-18 2017-08-18 Primary speed-down component and the oild chuck formula drill rod grip device for installing the component

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Application Number Priority Date Filing Date Title
CN201721038078.8U CN207260971U (en) 2017-08-18 2017-08-18 Primary speed-down component and the oild chuck formula drill rod grip device for installing the component

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Publication Number Publication Date
CN207260971U true CN207260971U (en) 2018-04-20

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