CN204371640U - Oil hydraulic pump driving shaft - Google Patents
Oil hydraulic pump driving shaft Download PDFInfo
- Publication number
- CN204371640U CN204371640U CN201420866917.5U CN201420866917U CN204371640U CN 204371640 U CN204371640 U CN 204371640U CN 201420866917 U CN201420866917 U CN 201420866917U CN 204371640 U CN204371640 U CN 204371640U
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- China
- Prior art keywords
- external splines
- conical surface
- axis body
- driving shaft
- cylindrical
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Abstract
Oil hydraulic pump driving shaft, comprises axis body, and wherein, axis body upper end is provided with the first external splines driving driving shaft to rotate for accepting external impetus, and below the first external splines, be provided with the guiding conical surface for mounting framework oil sealing; Being provided with in the middle part of axis body for installing plunger cylinder and the second external splines driving plunger cylinder to rotate, being provided with above the second external splines and working for installing bearing the first support cylindrical supporting whole driving shaft effect; Axis body lower end be provided with for install bearing play support whole driving shaft effect second support cylindrical and for by transmission of power to the 3rd external splines of slippage pump, first support cylindrical and second supports cylindrical for reducing the wearing and tearing of oil hydraulic pump driving shaft; In axis body both ends of the surface, be provided with the first thimble conical surface for axis body locating and machining and the second thimble conical surface simultaneously; Be conducive to the precision improving axis body processing, and then ensure the transmission performance between each assembly.
Description
Technical field
The utility model relates to Variable plunger pump technical field, particularly relates to a kind of oil hydraulic pump driving shaft.
Background technique
Oil hydraulic pump driving shaft for transmission of power, accepts external impetus and by self rotating by transmission of power to slippage pump, coordinating plunger reciprocating along with the rotation of cylinder body, thus completing oil suction and force feed action in Variable plunger pump.But oil hydraulic pump driving shaft is while carrying out transmission of power, the parts such as Yin Chang and plunger cylinder, oil distribution casing or bearing with the use of, also need the effect playing bearing load, holding structure rigidity.The oil hydraulic pump driving shaft of current use, with plunger cylinder, oil distribution casing or bearing movable process, supports whole oil hydraulic pump driving shaft without supporting surface, causes the serious wear of oil hydraulic pump driving shaft; Simultaneously when working fluid press pump driving shaft, because of without locating and machining face, cause the oil hydraulic pump driving shaft precision of production low, and then affect the transmission performance between each assembly.
Model utility content
The technical problem that the utility model solves is to provide a kind of oil hydraulic pump driving shaft, to solve the shortcoming in above-mentioned background technology.
The technical problem that the utility model solves realizes by the following technical solutions:
Oil hydraulic pump driving shaft, comprises axis body, and wherein, axis body upper end is provided with the first external splines driving driving shaft to rotate for accepting external impetus, and below the first external splines, be provided with the guiding conical surface for mounting framework oil sealing; Being provided with in the middle part of axis body for installing plunger cylinder and the second external splines driving plunger cylinder to rotate, being provided with above the second external splines and working for installing bearing the first support cylindrical supporting whole driving shaft effect; Axis body lower end be provided with for install bearing play support whole driving shaft effect second support cylindrical and for by transmission of power to the 3rd external splines of slippage pump; In axis body both ends of the surface, be provided with the first thimble conical surface for axis body locating and machining and the second thimble conical surface simultaneously; In addition, first external splines is 0.036mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface, second external splines is 0.026mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface, and the 3rd external splines is 0.06mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface.
In the utility model, inside, axis body upper end is provided with locates fastening internal thread for ex-ternal transmission part.
In the utility model, the guiding conical surface is provided with for the sealing cylindrical with the rotary seal of outside framework oil seal dynamic fit.
In the utility model, the second external splines and first supports cylindrical joint and is provided with transition cylindrical, and transition outside diameter is less than the first support outside diameter, is convenient to the installation of bearing.
In the utility model, the 3rd external splines and second supports between cylindrical and is provided with tool withdrawal groove.
In the utility model, the radial dimension precision of sealing cylindrical is 0mm ~-0.05mm, and surface roughness is Ra0.2 μm; The first radial dimension tolerance supporting cylindrical is+0.002 ~+0.013mm, and surface roughness is Ra0.8 μm; Second tolerance of size supporting cylindrical is-0.03 ~-0.05mm, and surface roughness is Ra0.2 μm; Sealing cylindrical, second supports cylindrical, the first support cylindrical is 0.02mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface.
Oil hydraulic pump driving shaft processing method, concrete steps are as follows:
1) choose body material, the bar of 31CrMoV9+QT selected by body material, and after body material forges, carries out artificial aging process, obtains axis body base substrate, by selecting the bar of 31CrMoV9+QT, to improve axis body bearing load and structural rigidity;
2) double spindle turning center processing is adopted, to step 1) the axis body base substrate that obtains carries out machining, be temporarily spline matrix cylindrical in first external splines, the 3rd external splines, the machining at this moment of the second external splines, and support cylindrical, first with sealing cylindrical, second and support cylindrical and stay machining allowance simultaneously, obtain axis body semi-finished product; And in double spindle turning center processing, Production development sampling observation detector is installed, check critical size, ensure the machining accuracy of batch production, effectively control scrappage;
3) to step 2) in obtain axis body semi-finished product carry out quenching with Subsequent tempering, quenching and tempering hardness is HRC25 ~ 30, and modified rear mechanical strength is not less than 1000N/mm
2;
4) in step 3) in carry out on the complete axis body semi-finished product of quenching with Subsequent tempering, grind the first thimble conical surface and the second thimble conical surface, and with the first thimble conical surface and the second thimble conical surface for positioning datum, first external splines, sealing cylindrical, the 3rd external splines, second are supported to cylindrical, the second external splines and the first cylindrical supporting cylindrical and carry out grinding, and sealing cylindrical, second supports cylindrical and the first support cylindrical stays subsequent fine machining allowance, the first external splines, the 3rd external splines and the second external splines are ground to the requirement of spline matrix excircle dimension;
5) step 4 is treated) after the grinding of central axis semi-finished product, with the basic circle of the first external splines and the first thimble conical surface for positioning datum processes the second external splines, with the second external splines and the first thimble conical surface for positioning datum processes the 3rd external splines, with the second external splines and the second thimble conical surface for positioning datum processes the first external splines;
6) to step 5) in the axis body semi-finished product of completion of processing carry out surface gas nitriding treatment, grinding front surface hardness is not less than 1000HV0.2, depth of penetration 0.35 ~ 0.5mm;
7) in step 6) in carry out on the complete axis body semi-finished product of surface gas nitriding treatment, with the first thimble conical surface and the second thimble conical surface for positioning datum, fine ginding processing sealing cylindrical, second supports cylindrical and first and supports cylindrical to size tolerance requirements, grinding rear surface hardness is not less than 850HV0.2, and depth of penetration is not less than 0.25mm;
8) until step 7) after central axis semi-finished product fine ginding completion of processing, with the first thimble conical surface and the second thimble conical surface for benchmark, soft polishing sealing cylindrical, second supports cylindrical and first and supports cylindrical to reaching surface roughness requirements, obtains axis body;
9) to step 8) the middle axis body employing manual mode removal burr obtained;
10) to step 9) in remove the complete axis body of burr and carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
11) to step 10) in detect qualified axis body carry out cleaning corrosion protection and degaussing process;
12) to step 11) in carry out cleaning axis body outward appearance that corrosion protection degaussing is disposed detect qualified after, encapsulation warehouse-in.
Beneficial effect: the guiding conical surface of the utility model by being provided with below the first external splines for mounting framework oil sealing, and the conical surface that leads is provided with for the sealing cylindrical with the rotary seal of outside framework oil seal dynamic fit, axis body is provided with the first support cylindrical and second playing the whole driving shaft effect of support for installing bearing and supports cylindrical, to reduce the wearing and tearing of oil hydraulic pump driving shaft; In axis body both ends of the surface, be provided with the first thimble conical surface for axis body locating and machining and the second thimble conical surface simultaneously, be conducive to the precision improving axis body processing, and then ensure the transmission performance between each assembly.
Accompanying drawing explanation
Fig. 1 is the structural representation of preferred embodiment of the present utility model.
Fig. 2 is C-C place sectional view in Fig. 1.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See the oil hydraulic pump driving shaft of Fig. 1 ~ Fig. 2, comprise the first external splines 1, sealing cylindrical 2, transition cylindrical 3, the 3rd external splines 4, the first thimble conical surface 5, tool withdrawal groove 6, second supports cylindrical 7, second external splines 8, first support cylindrical 9, lead the conical surface 10, the second thimble conical surface 11 and internal thread 12.
In the present embodiment, driving shaft axis body is designed with from top to bottom successively: the first external splines 1, for accepting external impetus, drives driving shaft to rotate; The guiding conical surface 10, for the installation of outside framework oil seal; Sealing cylindrical 2, for the dynamic fit rotary seal with outside framework oil seal; First supports cylindrical 9 and second supports cylindrical 7, for installing bearing, plays the effect supporting whole driving shaft; Transition cylindrical 3, its outside diameter size is less than the outside diameter size of the first support cylindrical 9, is convenient to the installation of bearing; Second external splines 8, it is provided with plunger cylinder, and drives plunger cylinder to rotate; The 3rd external splines 4 arranged bottom axis body, for by transmission of power to slippage pump, and support between cylindrical 7 at the 3rd external splines 4 and second and be provided with tool withdrawal groove 6; Axis body both ends of the surface are provided with the first thimble conical surface 5 and the second thimble conical surface 11, and inside, axis body upper end is provided with internal thread 12, the location for ex-ternal transmission part is fastening simultaneously.
In the present embodiment, the radial dimension precision of sealing cylindrical 2 is 0mm ~-0.05mm, and surface roughness requirements is Ra0.2 μm; The first radial dimension tolerance supporting cylindrical is+0.002 ~+0.013mm, and surface roughness is Ra0.8 μm; Second tolerance of size supporting cylindrical 7 is-0.03 ~-0.05mm, and surface roughness is Ra0.2 μm; First external splines 1 is 0.036mm relative to the jerk value of the first thimble conical surface 5 and the second thimble conical surface 11, and the 3rd external splines 4 is 0.06mm relative to the jerk value of the first thimble conical surface 5 and the second thimble conical surface 11; Second external splines 8 is 0.026mm relative to the jerk value of the first thimble conical surface 5 and the second thimble conical surface 11, and sealing cylindrical 2, second supports cylindrical 7, first support cylindrical 9 and is 0.02mm relative to the jerk value of the first thimble conical surface 5 and the second thimble conical surface 11.
In the present embodiment, oil hydraulic pump driving shaft processing method, concrete steps are as follows:
1) choose body material, the bar of 31CrMoV9+QT selected by body material, and after body material forges, carries out artificial aging process, obtains axis body base substrate;
2) double spindle turning center processing is adopted, to step 1) the axis body base substrate that obtains carries out machining, be temporarily spline matrix cylindrical in first external splines 1, the 3rd external splines 4, second external splines 8 machining at this moment, and support cylindrical 7, first with sealing cylindrical 2, second and support cylindrical 9 and stay machining allowance simultaneously, obtain axis body semi-finished product; And in double spindle turning center processing, Production development sampling observation detector is installed, check critical size, ensure the machining accuracy of batch production, effectively control scrappage;
3) to step 2) in obtain axis body semi-finished product carry out quenching with Subsequent tempering, quenching and tempering hardness is HRC25 ~ 30, and modified rear mechanical strength is not less than 1000N/mm
2;
4) in step 3) in carry out on the complete axis body semi-finished product of quenching with Subsequent tempering, grind the first thimble conical surface 5 and the second thimble conical surface 11, and with the first thimble conical surface 5 and the second thimble conical surface 11 for positioning datum, to the first external splines 1, sealing cylindrical 2, the 3rd external splines 4, second supports cylindrical 7, second external splines 8 and the first cylindrical supporting cylindrical 9 carries out grinding, and sealing cylindrical 2, second supports cylindrical 7 and the first support cylindrical 9 stays subsequent fine machining allowance, the first external splines 1, the 3rd external splines 4 and the second external splines 8 are ground to the requirement of spline matrix excircle dimension;
5) step 4 is treated) after the grinding of central axis semi-finished product, with the basic circle of the first external splines 1 and the first thimble conical surface 5 for positioning datum processes the second external splines 8, with the second external splines 8 and the first thimble conical surface 5 for positioning datum processes the 3rd external splines 4, with the second external splines 8 and the second thimble conical surface 11 for positioning datum processes the first external splines 1;
6) to step 5) in the axis body semi-finished product of completion of processing carry out surface gas nitriding treatment, grinding front surface hardness is not less than 1000HV0.2, depth of penetration 0.35 ~ 0.5mm;
7) in step 6) in carry out on the complete axis body semi-finished product of surface gas nitriding treatment, with the first thimble conical surface 5 and the second thimble conical surface 11 for positioning datum, fine ginding processing sealing cylindrical 2, second supports cylindrical 7 and first and supports cylindrical 9 to size tolerance requirements, grinding rear surface hardness is not less than 850HV0.2, and depth of penetration is not less than 0.25mm;
8) until step 7) after central axis semi-finished product fine ginding completion of processing, with the first thimble conical surface 5 and the second thimble conical surface 11 for benchmark, soft polishing sealing cylindrical 2, second supports cylindrical 7 and first and supports cylindrical 9 to reaching surface roughness requirements, obtains axis body;
9) to step 8) the middle axis body employing manual mode removal burr obtained;
10) to step 9) in remove the complete axis body of burr and carry out sampling Detection, sampling observation rate is not less than 5%, and sample detection be entirely examine;
11) to step 10) in detect qualified axis body carry out cleaning corrosion protection and degaussing process;
12) to step 11) in carry out cleaning axis body outward appearance that corrosion protection degaussing is disposed detect qualified after, encapsulation warehouse-in.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. oil hydraulic pump driving shaft, comprises axis body, it is characterized in that, axis body upper end is provided with the first external splines driving driving shaft to rotate for accepting external impetus, and below the first external splines, be provided with the guiding conical surface for mounting framework oil sealing; Being provided with in the middle part of axis body for installing plunger cylinder and the second external splines driving plunger cylinder to rotate, being provided with above the second external splines and working for installing bearing the first support cylindrical supporting whole driving shaft effect; Axis body lower end be provided with for install bearing play support whole driving shaft effect second support cylindrical and for by transmission of power to the 3rd external splines of slippage pump; In axis body both ends of the surface, be provided with the first thimble conical surface for axis body locating and machining and the second thimble conical surface simultaneously; In addition, first external splines is 0.036mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface, second external splines is 0.026mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface, and the 3rd external splines is 0.06mm relative to the jerk value of the first thimble conical surface and the second thimble conical surface.
2. oil hydraulic pump driving shaft according to claim 1, is characterized in that, inside, axis body upper end is provided with locates fastening internal thread for ex-ternal transmission part.
3. oil hydraulic pump driving shaft according to claim 1, is characterized in that, the guiding conical surface is provided with for the sealing cylindrical with the rotary seal of outside framework oil seal dynamic fit.
4. oil hydraulic pump driving shaft according to claim 1, is characterized in that, the second external splines and first supports cylindrical joint and is provided with transition cylindrical.
5. oil hydraulic pump driving shaft according to claim 4, is characterized in that, transition outside diameter is less than the first support outside diameter.
6. oil hydraulic pump driving shaft according to claim 1, is characterized in that, the 3rd external splines and second supports between cylindrical and is provided with tool withdrawal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420866917.5U CN204371640U (en) | 2014-12-30 | 2014-12-30 | Oil hydraulic pump driving shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420866917.5U CN204371640U (en) | 2014-12-30 | 2014-12-30 | Oil hydraulic pump driving shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371640U true CN204371640U (en) | 2015-06-03 |
Family
ID=53327865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420866917.5U Expired - Fee Related CN204371640U (en) | 2014-12-30 | 2014-12-30 | Oil hydraulic pump driving shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204371640U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625638A (en) * | 2014-12-30 | 2015-05-20 | 南京萨伯工业设计研究院有限公司 | Driving shaft of hydraulic pump and machining method thereof |
| CN109764055A (en) * | 2018-12-03 | 2019-05-17 | 中国北方车辆研究所 | A kind of design method improving the severe duty drive main shaft service life |
-
2014
- 2014-12-30 CN CN201420866917.5U patent/CN204371640U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625638A (en) * | 2014-12-30 | 2015-05-20 | 南京萨伯工业设计研究院有限公司 | Driving shaft of hydraulic pump and machining method thereof |
| CN109764055A (en) * | 2018-12-03 | 2019-05-17 | 中国北方车辆研究所 | A kind of design method improving the severe duty drive main shaft service life |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20171230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |