CN202768617U - Crank shaft assembly of double-speed hydraulic motor - Google Patents
Crank shaft assembly of double-speed hydraulic motor Download PDFInfo
- Publication number
- CN202768617U CN202768617U CN 201220426184 CN201220426184U CN202768617U CN 202768617 U CN202768617 U CN 202768617U CN 201220426184 CN201220426184 CN 201220426184 CN 201220426184 U CN201220426184 U CN 201220426184U CN 202768617 U CN202768617 U CN 202768617U
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- steel ball
- axle
- steering channel
- piston body
- perforation
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Abstract
The utility model relates to a crank shaft assembly of a double-speed hydraulic motor. The crank shaft assembly is improved on the basis of a crank shaft with a piston cavity, an oil introduction shaft, a piston body, a pull rod, an upper steel ball and a lower steel ball in the prior art, namely, a spring is arranged in the bottom of the piston cavity, one end of the spring abuts against the piston body, and the other end of the spring abuts against the inner wall of the piston cavity. Compared with the prior art, the crank shaft assembly has the advantage that a second channel is not required to be arranged on the crank shaft by means of restoring force of the spring, so that the crank shaft assembly facilitates processing and improves crank shaft strength under the same condition. Further, a sealing ring is not required to be installed on the circumferential face of the piston body adjacent to the spring. Therefore, the crank shaft assembly has the advantage that the piston body is flexible to move, convenient to process and low in cost while achieving the prior speed changing function.
Description
Technical field
The utility model relates to a kind of crankshaft group for oil hydraulic motor, specifically refers to the crankshaft group in a kind of double speed hydraulic motor.
Background technique
Existing crank shaft-connection-lever type hydraulic generally includes housing, logical food tray, oil distribution casing, plunger case and crankshaft group, wherein, crankshaft group is comprised of bent axle, bearing housing and many rows roller of being positioned at bearing housing, plunger case is odd number, be evenly distributed on radially respectively on the circumference of bent axle, plunger in the plunger case is connected with the ball-joint of connection rod sphere phase, the cylndrical surface of connecting rod bottom contacts with bearing housing, bent axle is bearing in housing and the capping by bearing, one end of bent axle links to each other with oil distribution casing by double-end key, and the other end then is used for being with dynamic load.During use, when pressure oil by logical food tray through oil distribution casing, when housing enters into plunger case, the action of hydraulic force that pressure oil produces is in plunger head, this hydraulic coupling resolves into along the power at the crank throw center of connecting rod center line sensing bent axle and the lateral force that the plunger case inwall is produced, the former tangential force produces moment of torsion to the rotating center of bent axle, make the rotation of bent axle flexing axle rotating center, thereby realize with hydraulic energy transfer being mechanical energy, be the purpose of working machine output speed and moment of torsion.
All disclosed crankshaft group separately in the existing different oil hydraulic motor.But in the existing crankshaft structure, the throw of eccentric of their bent axle is changeless, and the moment of torsion of bent axle is also certain, namely under the pressure oil condition of connecting uniform pressure, the rotating speed of the bent axle in the oil hydraulic motor immobilizes, thereby has affected to a certain extent their application area.
For this reason, the crankshaft group that the applicant once designed double speed hydraulic motor comes, number be CN201944102U " a kind of crankshaft group for oil hydraulic motor " such as the Chinese patent notice of authorization, in this crankshaft group, pass through dexterously the left and right sides slippage of piston body, under the guiding function of steel ball and steering channel, push rod or lower steel ball promote the relative bent axle of axle sleeve and move up and down, thereby change the centripetal moment of crankshaft group integral body, and then change the size of the suffered moment of torsion of crankshaft group, finally realize under passing to the pressure oil situation of uniform pressure, changing the speed of crankshaft in the oil hydraulic motor, finally can enlarge the using scope of oil hydraulic motor.
But in above-mentioned crankshaft group, the power that piston body moves from right to left comes from pressure oil, and this pressure oil enters in the piston cavity on piston body right side by the second channel of offering on the bent axle.Adopt such scheme, although also can reach the purpose of speed change, process inconvenience, can reduce simultaneously the intensity of bent axle, and after setting up second channel, need to carry out liquid sealing to the right-hand member of piston body, and this can affect the flexible movement of piston body to a certain extent.
Therefore, still await further improvement for the crankshaft group in the existing double speed hydraulic motor.
The model utility content
Technical problem to be solved in the utility model is the present situation for prior art, provides a kind of easy to process and piston body to move crankshaft group in the double speed hydraulic motor more flexibly.
The utility model solves the problems of the technologies described above the technological scheme that adopts: the crankshaft group in a kind of double speed hydraulic motor, include the logical oily axle that is arranged on the piston cavity open end and can rotates with bent axle with the bent axle of piston cavity and sealing, be provided with the piston body of energy axial slip in the described piston cavity, have the passage that communicates with the piston cavity of boundary between piston body and logical oily axle on the described logical oily axle; The eccentric part place of bent axle is arranged with axle sleeve, and the internal diameter of this axle sleeve is greater than the diameter of the eccentric part of described bent axle; The middle part of the eccentric part of described bent axle radially has upper perforation and the lower perforation that communicates with piston cavity, is provided with push rod and the upper steel ball of up and down slippage in the described upper perforation, is provided with lower steel ball in the lower perforation; The upper and lower part of described piston body has respectively vertically upper steering channel and the lower steering channel of gradually lifting, described upper and lower steel ball can be respectively relatively slippage in upper and lower steering channel; Steel ball is positioned under the highest point location status of steering channel on described, and described lower steel ball is positioned at the lowest part position of lower steering channel, and described upper steel ball promotes push rod and stretch out perforation and will push away on the axle sleeve, and bores a hole under the indentation in the lower steel ball; Steel ball is positioned under the lowest part location status of steering channel on described, lower steel ball is positioned at the highest point position of lower steering channel, and described lower steel ball stretches out lower perforation outward and pushes away under the axle sleeve, bore a hole in the indentation in the described push rod, it is characterized in that: be placed with a spring in the bottom of described piston cavity, this spring one end props up described piston body, and the other end is against on the inwall of this piston cavity.
For the ease of spring fitting, have the spring chamber that is located for the described spring the other end on the described bent axle.
Preferably, above-mentioned upper perforation and lower perforation are located along the same line; Described upper steering channel and lower steering channel are positioned at the middle part of piston body, the highest point of the highest point of the lowest part of upper steering channel and lower steering channel, the lowest part of lower steering channel and upper steering channel all is positioned on the same plane through the piston body axis, and is parallel to the piston body axis.Push rod and lower steel ball act on during power on the axle sleeve leans on like this, guarantee that axle sleeve is stressed evenly, the difficult skew.
Further improvement to above-mentioned preferred version is, is provided with seal ring between the side face of the described piston body of contiguous described logical oily axle and the piston cavity inner peripheral surface and carries out liquid sealing, is provided with seal ring between the outer circumferential face of described logical oily axle and the piston cavity inner peripheral surface and carries out liquid sealing.Guarantee that the fluid in the piston cavity of boundary between piston body and logical oily axle can not leak in outside and the upper and lower steering channel, guarantees the normal operation of crankshaft group.
In above-mentioned each scheme, further improved again is that the bottom of the eccentric part of above-mentioned bent axle has the confession axle sleeve and embeds its interior notch.Be convenient to so lower steel ball and expose outside bent axle, under the prerequisite that does not increase the bent axle diameter, so that axle sleeve radial deflection distance is larger.
More convenient is to link together by locating stud between above-mentioned logical oily axle and the bent axle, so that logical oily axle can rotate with bent axle.Certainly logical oily axle also can adopt alternate manner and bent axle to fix.
Practical is to have the circular groove with channel connection on the outer end side face of above-mentioned logical oily axle.Even in logical oily axle 360 degree rotary courses, all can lead to oil to passage like this.
Compared with prior art, the utility model has the advantage of: by means of the restoring force of spring, can save at bent axle and offer second channel, so both make things convenient for processing, under equal conditions improve again the intensity of bent axle, and this moment, also removed from the side face of the piston body of adjacent springs seal ring has been installed, therefore the utility model also has piston body and moves flexibly when realizing original speed changing function, easy to process, and the lower advantage of cost.
Description of drawings
Fig. 1 is the utility model embodiment's structure sectional view (shifting state under the axle sleeve);
Fig. 2 is the utility model embodiment's structure sectional view (axle sleeve raised state).
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, 2, be a preferred embodiment of the present utility model.
Crankshaft group in a kind of double speed hydraulic motor includes bent axle 1, and the medium position place of bent axle 1 has the eccentric part 12 that protrudes to a side, and this bent axle 1 profile is identical with existing bent axle 1.
Be provided with piston cavity 11 in the bent axle 1, the open end of piston cavity 11 is provided with the logical oily axle 2 that part exposes, opening with Air-tight piston chamber 11, be provided with seal ring 8 sealings between the outer circumferential face of logical oily axle 2 and piston cavity 11 inner peripheral surfaces, link together by locating stud 9 between logical oily axle 2 and the bent axle 1, so that logical oily axle 2 can be with bent axle 1 rotation.
Be provided with the piston body 3 of energy axial slip in the piston cavity 11, in the present embodiment, the side face of piston body 3 left ends and piston cavity 11 inner peripheral surfaces are provided with seal ring 8 and carry out liquid sealing, have the passage 21 that communicates with the piston cavity in piston body 3 left sides on the logical oily axle 2, expose on the logical oily axle 2 outer end side faces of bent axle and have the circular groove 22 that is communicated with passage 21, the bottom of piston cavity 11, be to be placed with a spring 10 in the piston cavity on piston body 3 right sides, these spring 10 1 ends prop up the right side of piston body 3, and the other end is against on the inwall of this piston cavity 11.For the ease of mounting spring 10, have the spring chamber 15 that is located for spring 10 the other ends at bent axle 1 here.
The middle part of the eccentric part 12 of bent axle radially has upper perforation 13 and the lower perforation 14 that communicates with piston cavity 11, and upper perforation 13 and lower perforation 14 are located along the same line; Be provided with successively push rod 5 and the upper steel ball 6 of up and down slippage in the upper perforation 13 from top to bottom, be provided with lower steel ball 7 in the lower perforation 14.
The top of piston body 3 has vertically from left to right the gradually upper steering channel 31 of lifting, upper steel ball 6 can be in upper steering channel 31 interior relative slippages, the bottom of piston body 3 has vertically the gradually lower steering channel 32 of lifting of right-to-left, and lower steel ball 7 can be in lower steering channel 32 interior relative slippages; Upper steering channel 31 and lower steering channel 32 are positioned at the middle part of piston body 3, the highest point of the lowest part of upper steering channel 31 and lower steering channel 32, all be positioned on the highest point of the lowest part of lower steering channel 31 and upper steering channel 32 on the same plane through the piston body axis, and be parallel to the piston body axis.
Be positioned at upper steel ball 6 under the highest point location status of steering channel 31, lower steel ball 7 is positioned at the lowest part position of lower steering channel 32, and upper steel ball 6 promotion push rods 5 stretch out perforation 13 and will push away on the axle sleeve 4, and bore a hole 14 under the lower steel ball 7 interior indentations; Be positioned at upper steel ball 6 under the lowest part location status of steering channel 31, lower steel ball 7 is positioned at the highest point position of lower steering channel 32, and lower steel ball 7 stretches out lower perforation 14 outward and axle sleeve is pushed away for 4 times, bores a hole 13 in the push rod 5 interior indentations.
The working procedure that this crankshaft group changes centripetal moment is as follows:
When high pressure oil entered the piston cavity 11 in piston body 3 left sides behind circular groove 22 and passage 21, high pressure oil pushing piston body 3 moved to right, piston body 3 Compress Springs 10, and upper steel ball 6 is positioned at the lowest part position of steering channel 31, bores a hole 13 in the push rod 5 interior indentations; At present steel ball 7 stretches out lower perforation 14 outward and axle sleeve is pushed away for 4 times together, and this moment, the centripetal moment e1 of bent axle was less, as shown in Figure 1.
When the rotation along with bent axle, when circular groove 22 and passage 21 are connected low pressure oil, spring 10 overcomes oil pressure, pushing piston body 3 moves to left, make steel ball 6 be positioned at the highest point position of steering channel 31, upper steel ball 6 promotion push rods 5 stretch out perforation 13 and will push away on the axle sleeve 4, and bore a hole 14 under the lower steel ball 7 interior indentations, this moment, the centripetal moment e2 of bent axle was larger, as shown in Figure 2.
Claims (7)
1. the crankshaft group in the double speed hydraulic motor, include the logical oily axle (2) that the bent axle (1) of band piston cavity (11) and sealing are arranged on piston cavity (11) open end and can rotate with bent axle (1), be provided with the piston body (3) of energy axial slip in the described piston cavity (11), have the passage (21) that communicates with the piston cavity of boundary between piston body (3) and logical oily axle (2) on the described logical oily axle (2); The eccentric part of bent axle (12) locates to be arranged with axle sleeve (4), and the internal diameter of this axle sleeve (4) is greater than the diameter of the eccentric part (12) of described bent axle; The middle part of the eccentric part of described bent axle (12) radially has upper perforation (13) and the lower perforation (14) that communicates with piston cavity (11), be provided with push rod (5) and the upper steel ball (6) of up and down slippage in the described upper perforation (13), be provided with lower steel ball (7) in the lower perforation (14); The upper and lower part of described piston body (3) has respectively vertically upper steering channel (31) and the lower steering channel (32) of gradually lifting, described upper and lower steel ball (6,7) can be respectively relatively slippage in upper and lower steering channel (31,32); Steel ball (6) is positioned under the highest point location status of upper steering channel (31) on described, described lower steel ball (7) is positioned at the lowest part position of lower steering channel (32), and described upper steel ball (6) promotion push rod (5) stretches out perforation (13) and will push away on the axle sleeve (4), and perforation (14) under the lower interior indentation of steel ball (7); Steel ball (6) is positioned under the lowest part location status of upper steering channel (31) on described, lower steel ball (7) is positioned at the highest point position of lower steering channel (32), and described lower steel ball (7) stretches out lower perforation (14) outward and will push away under the axle sleeve (4), perforation (13) in the interior indentation of described push rod (5), it is characterized in that: be placed with a spring (10) in the bottom of described piston cavity (3), these spring (10) one ends prop up described piston body (3), and the other end is against on the inwall of this piston cavity (3).
2. the crankshaft group in the double speed hydraulic motor according to claim 1 is characterized in that: have the spring chamber (15) that is located for described spring (10) the other end on the described bent axle (1).
3. the crankshaft group in the double speed hydraulic motor according to claim 1, it is characterized in that: described upper perforation (13) and lower perforation (14) are located along the same line; Described upper steering channel (31) and lower steering channel (32) are positioned at the middle part of piston body (3), the highest point of the lowest part of the highest point of the lowest part of upper steering channel (31) and lower steering channel (32), lower steering channel (31) and upper steering channel (32) all is positioned on the same plane through the piston body axis, and is parallel to the piston body axis.
4. the crankshaft group in the double speed hydraulic motor according to claim 3, it is characterized in that: be provided with seal ring (8) between the side face of the described piston body (3) of contiguous described logical oily axle (2) and piston cavity (11) inner peripheral surface and carry out liquid sealing, be provided with seal ring (8) between the outer circumferential face of described logical oily axle (2) and piston cavity (11) inner peripheral surface and carry out liquid sealing.
5. according to claim 1, the crankshaft group in 2, the 3 or 4 described double speed hydraulic motors, it is characterized in that: the bottom of the eccentric part of described bent axle (12) has for described axle sleeve (4) and embeds notch (121) in it.
6. according to claim 1, the crankshaft group in 2, the 3 or 4 described double speed hydraulic motors, it is characterized in that: link together by locating stud (9) between described logical oily axle (2) and the bent axle (1).
7. according to claim 1, the crankshaft group in 2, the 3 or 4 described double speed hydraulic motors, it is characterized in that: have the circular groove (22) that is communicated with passage (21) on the outer end side face of described logical oily axle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220426184 CN202768617U (en) | 2012-08-24 | 2012-08-24 | Crank shaft assembly of double-speed hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220426184 CN202768617U (en) | 2012-08-24 | 2012-08-24 | Crank shaft assembly of double-speed hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202768617U true CN202768617U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220426184 Expired - Fee Related CN202768617U (en) | 2012-08-24 | 2012-08-24 | Crank shaft assembly of double-speed hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202768617U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421131A (en) * | 2013-08-22 | 2015-03-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor, air conditioner and heat-pump water heater system |
-
2012
- 2012-08-24 CN CN 201220426184 patent/CN202768617U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104421131A (en) * | 2013-08-22 | 2015-03-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor, air conditioner and heat-pump water heater system |
| CN104421131B (en) * | 2013-08-22 | 2016-08-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor, air-conditioning and heat pump water heater system |
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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: 20130306 Termination date: 20200824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |