CN207578307U - A kind of bushing fixture of the pressure of rock bit - Google Patents
A kind of bushing fixture of the pressure of rock bit Download PDFInfo
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- CN207578307U CN207578307U CN201721645379.7U CN201721645379U CN207578307U CN 207578307 U CN207578307 U CN 207578307U CN 201721645379 U CN201721645379 U CN 201721645379U CN 207578307 U CN207578307 U CN 207578307U
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- cylinder
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- bushing
- gear wheel
- assembly cavity
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Abstract
A kind of bushing fixture of the pressure of rock bit, including pressing sleeve and step-like mandrel；The upper end of pressing sleeve and the pressure head of press are sequentially connected, lower end buckle gear wheel；Step-like mandrel corresponds to the assembly cavity setting of gear wheel, has upper, middle and lower three-level cylinder；It is bushing to be sheathed on higher level's cylinder, the two clearance fit；Bushing bottom surface is resisted against the top surface of intermediate cylinder；The peripheral wall of subordinate's cylinder is then bonded with the bottom opening of assembly cavity；Exhaust channel is further included, is opened in step-like mandrel, there are one exhaust outlet and at least two air inlets for tool；The bottom that exhaust outlet is located at subordinate's cylinder is communicated with air；Each air inlet is opened in the top of higher level's cylinder and the side wall of intermediate cylinder respectively, for the air in assembly cavity to be expelled to outside atmosphere.The utility model is simple in structure, low manufacture cost, easy to use, reduce labor intensity, has the advantages that accurate positioning, high in machining efficiency, meets the technology requirement of product processing, improve product qualification rate.
Description
Technical field
The utility model is related to rock bit manufacturing fields, and in particular to a kind of small axis hole of gear wheel being used in rock bit
The bushing fixture of middle pressure.
Background technology
Rock bit is common drilling bit, and including bit leg and gear wheel, wherein bit leg is equipped with bearing and is rotated for gear wheel
Assembling.In ore deposit bores sliding bearing, small axis edge sliding sleeve is common structure, and the two is interference fit.Existing way is to use to incite somebody to action
Sliding sleeve（It is bushing）The small axis of bearing is directly knocked in, there are operation difficulty is big, labor intensity is high and processing efficiency is low for this prior art
The deficiencies of, it is difficult to ensure that additionally, due to the aligning accuracy of sliding sleeve and small axis, the qualification rate for also causing product is low.
Therefore, above-mentioned the shortcomings of the prior art how is solved, is become as the class to be researched and solved of the utility model
Topic.
Invention content
The purpose of this utility model is to provide a kind of bushing fixtures of the pressure of rock bit.
In order to achieve the above objectives, the technical solution adopted in the utility model is：A kind of bushing fixture of the pressure of rock bit, packet
Include pressing sleeve and step-like mandrel；
The upper end of the pressing sleeve and the pressure head of press are sequentially connected, and the lower end of pressing sleeve has an opening, the shape of the opening
Match with the upper end shape of gear wheel, to reach snaps into position with the gear wheel；
The step-like mandrel correspond to the gear wheel assembly cavity setting, have upper, middle and lower three-level cylinder, and this three
The diameter of grade cylinder successively increases from top to bottom；
Wherein, the bushing circumference for being sheathed on higher level's cylinder, bushing hole wall match with the peripheral wall of higher level's cylinder and merge tool
There is a gap；The bushing circular bottom surface is resisted against the circular top surface of intermediate cylinder；The peripheral wall of subordinate's cylinder is then
Setting is bonded with the bottom opening of the assembly cavity of gear wheel；
Wherein, an exhaust channel is further included, which is opened in the step-like mandrel, has exhaust outlet and air inlet
Mouthful；The exhaust outlet is located at the bottom of subordinate's cylinder of step-like mandrel, is communicated with air；On the air inlet corresponds to
The top of grade cylinder and the side wall of intermediate cylinder open up, for by the air in the assembly cavity of the gear wheel via the row
Gas access is discharged from the exhaust outlet.
Related content in above-mentioned technical proposal is explained as follows：
1. in said program, by the design of the exhaust channel, being on the one hand used for will be in the assembly cavity of the gear wheel
Air is discharged via the exhaust channel from the exhaust outlet, on the other hand can also avoid the assembly cavity of step-like mandrel and gear wheel
Vacuum is formed after assembling in assembly cavity, after the small axis hole for leading to bushing press-in assembly cavity, step-like mandrel is difficult to and gear wheel
Separation.
2. in said program, during work, first by the bushing higher level's cylinder for being sheathed on step-like mandrel, the two gap
Cooperation；Then gear wheel is placed on and be arranged in bushing step-like mandrel, the bottom opening of gear wheel assembly cavity and the step-like heart
The peripheral wall fitting positioning of subordinate's cylinder of axis, while the air in assembly cavity is discharged via the exhaust channel；Pass through later
The pressure head of press pushes the pressing sleeve, and lower pressure is transferred on gear wheel by the cooperation of pressing sleeve and gear wheel upper end, forces gear wheel
It moves downward, it will be in the small axis hole of the bushing press-in gear wheel assembly cavity of step-like mandrel upper end；Pressing sleeve is finally moved up, takes combination away
There is bushing gear wheel, complete the bushing operation of pressure of gear wheel.
3. in said program, further including a microscope carrier, which is positioned on the workbench of press, and the step-like mandrel is determined
Positioned at the upper surface of the microscope carrier.
4. in said program, the exhaust outlet runs through the microscope carrier, is communicated with air.
5. in said program, the step-like mandrel is replaces part, to realize the insetting case technology of sliding bearing different product
Processing.
The operation principle and advantage of the utility model are as follows：
A kind of bushing fixture of the pressure of rock bit of the utility model, including pressing sleeve and step-like mandrel；The upper end of pressing sleeve
It is sequentially connected with the pressure head of press, lower end buckle gear wheel；Step-like mandrel corresponds to the assembly cavity setting of gear wheel, has upper, middle and lower
Three-level cylinder；It is bushing to be sheathed on higher level's cylinder, the two clearance fit；Bushing bottom surface is resisted against the top surface of intermediate cylinder；
The peripheral wall of subordinate's cylinder is then bonded with the bottom opening of assembly cavity；Exhaust channel is further included, is opened in step-like mandrel, is had
There are one exhaust outlet and at least two air inlets；The bottom that exhaust outlet is located at subordinate's cylinder is communicated with air；Each air inlet point
It is not opened in the top of higher level's cylinder and the side wall of intermediate cylinder, it is external big for the air in assembly cavity to be expelled to
Gas.
Compared to existing technologies, the utility model using press and passes through the positioning of fixture by the small of bushing press-in gear wheel
Axis hole, clamp structure is simple, part low manufacture cost, and it is easy to use, reduce labor intensity, with more accurate positioning plus
The advantages of work is efficient meets the technology requirement of product processing, improves product qualification rate.
Description of the drawings
Structure diagram when attached drawing 1 is used for the utility model embodiment；
Attached drawing 2 is the structure diagram of the step-like mandrel of the utility model embodiment.
In the figures above：1. pressing sleeve；2. step-like mandrel；3. opening；4. gear wheel；5. assembly cavity；6. higher level's cylinder；7.
Intermediate cylinder；8. subordinate's cylinder；It is 9. bushing；10. exhaust channel；11. exhaust outlet；12. air inlet；13. microscope carrier.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments：
Embodiment：Referring to shown in attached drawing 1,2, a kind of bushing fixture of the pressure of rock bit, including pressing sleeve 1 and the step-like heart
Axis 2；
The upper end of the pressing sleeve 1 and the pressure head of press are sequentially connected, and the movement of upper and lower directions is done with the pressure head；Pressing sleeve 1
Lower end have one opening 3, the shape of the opening 3 matches with the upper end shape of gear wheel 4, to reach buckle with the gear wheel 4
Positioning；Therefore, the lower pressure of pressure head will be transferred to by the pressing sleeve 1 on gear wheel 4.
The assembly cavity 5 that the step-like mandrel 2 corresponds to the gear wheel 4 is set, and the assembly cavity 5 is for the bit leg that is linked and packed
Bearing；The step-like mandrel 2 has upper, middle and lower three-level cylinder 6,7,8, and the diameter of the three-level cylinder 6,7,8 is from upper
It is successively increased under；
Wherein, bushing 9 circumference for being sheathed on higher level's cylinder 6, bushing 9 hole wall coordinate with the peripheral wall of higher level's cylinder 6
And with a gap；Described bushing 9 circular bottom surface is resisted against the circular top surface of intermediate cylinder 7；Subordinate's cylinder 8
Bottom opening of the peripheral wall then with the assembly cavity 5 of gear wheel 4 is bonded setting.
Wherein, an exhaust channel 10 is further included, which is opened in the step-like mandrel 2, and there are one tools
11 and at least two air inlet 12 of exhaust outlet；The exhaust outlet 11 is located at the bottom of subordinate's cylinder 8 of step-like mandrel 2
Portion is communicated with air；Each air inlet 12 is opened in the top of higher level's cylinder 6 and the side wall of intermediate cylinder 7 respectively,
On the one hand for the air in the assembly cavity 5 of the gear wheel 4 to be discharged via the exhaust channel 10 from the exhaust outlet 11, separately
On the one hand the assembly cavity 5 of step-like mandrel 2 and gear wheel 4 can also be avoided to form vacuum in assembly cavity 5 after assembling, caused bushing
After the small axis hole of 9 press-in gear wheels 4, step-like mandrel 2 is difficult to detach with gear wheel 4.
Now the operation principle of this fixture is described as follows：The higher level's cylinder for being sheathed on step-like mandrel 2 by bushing 9 first
On 6, the two clearance fit；Then gear wheel 4 is placed in the step-like mandrel 2 for being arranged with bushing 9, the bottom of 4 assembly cavity 5 of gear wheel
Portion's opening is bonded positioning with the peripheral wall of subordinate's cylinder 8 of step-like mandrel 2, while the air in assembly cavity 5 is via the row
Gas access 10 is discharged；The pressing sleeve 1 is pushed by the pressure head of press later, will be pushed by the cooperation of pressing sleeve 1 and 4 upper end of gear wheel
Power is transferred on gear wheel 4, and gear wheel 4 is forced to move downward, by bushing 9 press-in, 4 assembly cavity 5 of gear wheel of step-like 2 upper end of mandrel
In small axis hole；Finally move up pressing sleeve 1, take away be combined with bushing 9 gear wheel 4, complete gear wheel 4 bushing 9 operation of pressure.
Wherein, a microscope carrier 13 is further included, which is positioned on the workbench of press, and the step-like mandrel 2 positions
In the upper surface of the microscope carrier 13.The exhaust outlet 11 runs through the microscope carrier 13, is communicated with air.
Compared to existing technologies, the utility model using press and passes through the positioning of fixture by the small of bushing press-in gear wheel
Axis hole, clamp structure is simple, part low manufacture cost, and it is easy to use, reduce labor intensity, with more accurate positioning plus
The advantages of work is efficient meets the technology requirement of product processing, improves product qualification rate.
Above-described embodiment is only the technical concepts and features for illustrating the utility model, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement according to this, can not the scope of protection of the utility model be limited with this.
It is all according to the spirit of the present invention substantially equivalent change or modification for being made, should all cover the scope of protection of the utility model it
It is interior.
Claims (3)
1. a kind of bushing fixture of the pressure of rock bit, it is characterised in that：
Including pressing sleeve and step-like mandrel；
The upper end of the pressing sleeve and the pressure head of press are sequentially connected, and the lower end of pressing sleeve has an opening, the shape and tooth of the opening
The upper end shape of wheel matches, to reach snaps into position with the gear wheel；
The step-like mandrel corresponds to the assembly cavity setting of the gear wheel, has upper, middle and lower three-level cylinder, and the three-level is justified
The diameter of cylinder successively increases from top to bottom；
Wherein, the bushing circumference for being sheathed on higher level's cylinder, bushing hole wall are matched with the peripheral wall of higher level's cylinder and are merged with one
Gap；The bushing circular bottom surface is resisted against the circular top surface of intermediate cylinder；The peripheral wall of subordinate's cylinder then with tooth
The bottom opening fitting setting of the assembly cavity of wheel；
Wherein, an exhaust channel is further included, which is opened in the step-like mandrel, has exhaust outlet and air inlet；
The exhaust outlet is located at the bottom of subordinate's cylinder of step-like mandrel, is communicated with air；The air inlet corresponds to higher level
The side wall of the top of cylinder and intermediate cylinder opens up, for by the air in the assembly cavity of the gear wheel via the exhaust
Access is discharged from the exhaust outlet.
2. fixture according to claim 1, it is characterised in that：A microscope carrier is further included, which is positioned at the work of press
On platform, the step-like mandrel is positioned at the upper surface of the microscope carrier.
3. fixture according to claim 2, it is characterised in that：The exhaust outlet runs through the microscope carrier, is communicated with air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645379.7U CN207578307U (en) | 2017-11-30 | 2017-11-30 | A kind of bushing fixture of the pressure of rock bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645379.7U CN207578307U (en) | 2017-11-30 | 2017-11-30 | A kind of bushing fixture of the pressure of rock bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207578307U true CN207578307U (en) | 2018-07-06 |
Family
ID=62734894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721645379.7U Active CN207578307U (en) | 2017-11-30 | 2017-11-30 | A kind of bushing fixture of the pressure of rock bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207578307U (en) |
-
2017
- 2017-11-30 CN CN201721645379.7U patent/CN207578307U/en active Active
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