CN211116894U - Heavy-load rack swing oil cylinder - Google Patents
Heavy-load rack swing oil cylinder Download PDFInfo
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- CN211116894U CN211116894U CN201922147681.5U CN201922147681U CN211116894U CN 211116894 U CN211116894 U CN 211116894U CN 201922147681 U CN201922147681 U CN 201922147681U CN 211116894 U CN211116894 U CN 211116894U
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Abstract
The utility model discloses a heavy-load rack swing oil cylinder, which comprises a box body, a gear shaft, a rack, and two linear displacement output devices, wherein the two ends of the box body are coaxially arranged with the rack; the bearing mechanism is characterized in that a rack is used as a middle transmission stress part of the power mechanism, two independent power output mechanisms separated from the rack are coaxially arranged at two ends of the rack, so that the sealing performance of a power piston for supplying the rack cannot be influenced by heavy loads of a gear shaft and the rack, and meanwhile, internal/external impurities entering a working cavity of the rack piston cannot enter a cylinder body/piston to form strain damage, the service life of the whole machine is prolonged, a containing cavity for communicating atmosphere to an oil tank is further arranged between an oil pressure acting cavity and the rack, when the internal sealing permanent failure occurs, leaked oil is timely discovered and recovered, external leakage is avoided, the bearing mechanism is environment-friendly and pollution-free, and the bearing mechanism is convenient to.
Description
Technical Field
The utility model relates to a hydraulic pressure final controlling element specifically is a heavy load rack swing hydro-cylinder.
Background
Present compact heavy load moment of torsion output operating mode, what extensively adopted is hydraulic power's rack swing hydro-cylinder, and general output shaft adopts the gear shaft, and with the gear shaft meshing have both ends to be provided with the rack of piston in addition, act on the piston both ends in turn through the oil pressure, realize turning into the rotary motion of moment of torsion by linear motion, the problem of existence has: the gear engagement causes high load in the radial direction of the piston of the rack, so that unilateral guide or sealing abrasion is formed, the sealing service life is shortened, and leakage cannot be avoided; impurities inside the gear rack or impurities outside the gear rack easily enter a working chamber of the rack piston, so that oil pollution or strain of a cylinder body/piston is caused, and destructive influence is also caused. With the development of the technology, at present, many high-load working conditions need to output higher torque rotary motion, and higher requirements are put forward on long service life, reliability and the like, and meanwhile, the application technologies of environmental protection/pollution prevention and high-cleanness working conditions are optimized and improved.
Disclosure of Invention
The utility model discloses a realize the higher bearing capacity of rack swing hydro-cylinder to reach more ideal life, improve the technical problem who improves interior external environment cross contamination of cylinder, provide a heavy load rack swing hydro-cylinder.
A heavy duty rack swing cylinder comprising: the linear displacement output device comprises a box body, a gear shaft, a rack and linear displacement output devices, wherein the two ends of the box body are coaxial with the rack. The gear box is characterized in that an accommodating cavity of a gear shaft is formed in the box body, an accommodating cavity of a rack is further formed in the box body, the axis of the accommodating cavity of the gear shaft of the box body is crossed with the axis of the accommodating cavity of the rack, and the meshing between the outer teeth of the gear shaft arranged in the box body and the rack is met.
Further, outer bosses are coaxially arranged on the two end sides of the rack, and exposed threaded holes are formed in the centers of the outer bosses;
the two end sides of the rack are respectively provided with a guide support sleeve, the periphery of the guide support sleeve is provided with a guide belt, and one side of the guide support sleeve is also provided with a coaxial positioning inner hole matched with an outer boss arranged on the rack; the guide support sleeve is fixedly connected with the end side of the rack through a screw; the guide support sleeves are arranged at two ends of the rack, and can effectively decompose one-way pressure formed by the gear shaft on the rack under the working condition of high liability.
The linear displacement output device includes: the cylinder cover, the cylinder barrel, the integral piston rod, the guide sleeve, the O-shaped ring and the flange; the cylinder cover is welded with the cylinder barrel, the guide sleeve is arranged at the other end of the cylinder barrel, the piston of the integral piston rod is arranged in the cylinder barrel, the rod end of the integral piston rod penetrates through the guide sleeve, the piston of the integral piston rod is provided with a hole seal and a hole guide, a shaft seal is arranged in an inner hole of the guide sleeve, an O-shaped ring is arranged on the outer circle of the guide sleeve matched with the cylinder barrel, and a flange is fixed on the outer circle of the cylinder barrel through threads, so that the hydraulic cylinder with a double-acting structure is formed, the axis of the hydraulic cylinder with the; the rod cavity of the hydraulic cylinder with the double-acting structure is connected to an oil drainage tank communicated with the atmosphere through a pipeline, the outlet of the pipeline is positioned above the liquid level of the oil drainage tank, and oil pressure can be established by supplying oil to the rodless cavity.
Furthermore, the guide sleeve is provided with an outer edge boss for positioning the outer cylinder;
a positioning inner hole is also formed in a rack cavity opening formed in the box body;
one end of the outer cylinder is in positioning clearance fit with an outer edge boss arranged on the guide sleeve, the other end of the outer cylinder is in clearance fit with a positioning inner hole arranged on a containing cavity opening of the box body rack, and the inner hole of the outer cylinder is a smooth boring hole; the cavity formed by the above method can meet the requirement that the guide support sleeve at the end of the rack slides in a reciprocating manner along with the rack in the inner hole of the outer cylinder.
The flange is provided with at least 4 connecting through holes in a distributed manner, and the pull rod penetrates through the flange to be positioned through the outer cylinder, so that the linear displacement output device is fixedly connected to the box body;
furthermore, a counter bore is formed in the end of the integral piston rod of the linear displacement output device; the integral piston rod of the linear displacement output device can extend out to push the guide support sleeve 13 to apply force to the rack shaft.
The two linear displacement output devices are respectively connected and fixed at two ends of the box body, when the linear displacement output device at one side works, the rodless cavity of the double-acting hydraulic cylinder establishes oil pressure, the rod cavity is communicated with the atmosphere to the oil tank, the oil pressure acts on the whole piston rod to extend out of the ejection rack to perform linear motion, and the gear rack is meshed with the drive gear shaft to output torque.
The linear displacement output device can also be other power output devices for outputting large thrust, such as an electric cylinder, a heavy linear module and a linear motor.
The invention adopts a new design scheme, aims at a rack as a middle transmission stress part of a power mechanism, avoids adverse effects such as pressure abrasion and deformation and the like on piston sealing at the end side of the rack in the prior art under the working condition of heavy load, designs a linear displacement output device separated from the rack, ensures that the load of a gear shaft and the rack does not influence the sealing performance of the power piston supplied to the rack, simultaneously, internal/external impurities entering a working chamber of the rack piston cannot enter a cylinder body/piston to form strain damage, prolongs the service life of the whole machine, simultaneously, also arranges a sealed rod cavity to prevent oil leakage and pollution under the condition of piston sealing failure of an integral piston rod, connects the rod cavity to the atmosphere through a pipeline for early monitoring and preventing leakage, and timely discovers and recovers the leaked oil when the internal sealing fails for a long time, the external leakage is avoided, the environment is protected, no pollution is caused, finally, the design of fixing the linear displacement output device through the pull rod enables the on-site dismounting and maintenance to be more convenient, and the sealed condition can be replaced without dismounting the rack and gear mechanism from the host.
Drawings
Fig. 1 is a half sectional view of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a left side view of the present invention;
fig. 4 is an exemplary view of the linear displacement output device of the present invention as an electric cylinder;
fig. 5 is an exemplary view of the linear displacement output device of the present invention as a linear motor;
fig. 6 is an illustration of the heavy linear module as the linear displacement output device of the present invention.
In the figure, 1-cylinder cover, 2-cylinder barrel, 3-integral piston rod, 4-hole seal, 5-hole guide, 6-guide sleeve, 7-shaft seal, 8-O-shaped ring, 9-flange, 10-outer barrel, 11-pull rod, 12-screw, 13-guide support sleeve, 14-support ring, 15-rack, 16-box body, 17-gear shaft, 18-electric cylinder, 19-linear motor and 20-heavy linear module.
Detailed Description
Outer bosses are coaxially arranged at two end sides of the rack 15, and exposed threaded holes are formed in the centers of the outer bosses; the two end sides of the rack 15 are respectively provided with a guide support sleeve 13; a support ring 14 is arranged on the periphery of the guide support sleeve 13, and a coaxial positioning inner hole matched with an outer boss arranged on the rack 15 is also arranged on one side of the guide support sleeve 13; the guide support sleeve 13 is fixedly connected to the end side of the rack 15 by a screw 12.
The linear displacement output device includes: the cylinder cover comprises a cylinder cover 1, a cylinder barrel 2, an integral piston rod 3, a guide sleeve 6, an O-shaped ring 8 and a flange 9; wherein, cylinder cap 1 and cylinder 2 welding, uide bushing 6 is installed in the 2 other ends of cylinder, the piston of whole piston rod 3 is placed in cylinder 2, the rod end is worn to locate uide bushing 6, set up on the piston of whole piston rod 3 the hole with sealed 4 and hole with leading 5, uide bushing 6 hole is provided with axle and is used sealed 7, 6 excircles of uide bushing with the cylinder 2 complex are provided with O type circle 8, flange 9 threaded fixation is in the 2 excircles of cylinder, constitute a pair of effect structure pneumatic cylinder from this, this pair of effect pneumatic cylinder axis and 15 axis coincidence of rack, flange 9 and the coaxial fixed mounting of pneumatic cylinder 2; the rod cavities T1 'and T2' of the hydraulic cylinder with the double-acting structure are connected with an oil discharge tank T communicated with the atmosphere, and the rod cavities A '/B' for oil supply at the A port/B port can establish oil pressure.
The guide sleeve 6 is provided with an outer edge boss; a positioning inner hole is also formed in the cavity opening of the rack 15 arranged on the box body 16; one end of the outer cylinder 10 is provided with an outer edge boss positioning clearance fit with the guide sleeve 6, the other end of the outer cylinder 10 is in clearance fit with a positioning inner hole arranged at the containing cavity opening of the rack 15 of the box body 16, the inner hole of the outer cylinder is a smooth boring hole, the formed containing cavities C1 and C2 can meet the requirement that the guide support sleeve 13 at the end of the rack 15 slides in a reciprocating mode along with the inner hole of the outer cylinder 10 of the rack 15, and the containing cavity C1 can also serve as an isolation cavity to isolate external impurities from entering.
The flange 9 is provided with at least 4 connecting through holes in a distributed mode, and the pull rod 11 penetrates through the flange 9 to be positioned through the outer cylinder 10, so that the linear displacement output device is fixedly connected to the box body 16.
A counter bore is arranged at the end of the integral piston rod 3; the integral piston rod 3 can extend to push the guide support sleeve 13 to apply force to the rack 15 shaft.
Two linear displacement output devices are respectively connected and fixed at two ends of the box body 16, when the linear displacement output device at one side works, the rodless cavity of the double-acting hydraulic cylinder establishes oil pressure, the rod cavity is communicated with the atmosphere to the oil tank, the oil pressure acts on the integral piston rod 3 to extend out of the ejection rack 15 for linear motion, and the gear rack is meshed with the driving gear shaft 17 to output torque.
As shown in FIG. 1, when the oil pressure is built up at the side of the port A connected with the rodless cavity A', the integral piston rod 3 at the side of the port A is extended, the supporting sleeve 13 is pushed to act on the shaft of the rack 15, the rack 15 is displaced, the supporting rings 14 of the supporting sleeves 13 at two sides are guided through the cavities C1 and C2 in the outer cylinder 10, the gear shaft 17 is meshed with the rack 15 to rotate to output torque, and the integral piston rod at the side of the port B is passively retracted.
When the hole seal 4 fails for a long time, oil leaks to the rod cavity, the O-shaped ring 8 of the guide sleeve 6 and the shaft seal 7 prevent the oil from leaking to the outside and the rack 15 accommodating cavity, and the leaked oil in the rod cavity T1/T2 can flow back to communicate with an oil return tank T communicated with the atmosphere, so that the failure of the hole seal 4 can be judged, and maintenance and seal replacement can be carried out; during maintenance, the pull rod 11 can be disassembled, so that the double-acting hydraulic cylinder structure of the linear displacement output device is completely separated, the independent maintenance is carried out without any oil leakage, the rack swing cylinder body is not required to be disassembled, and the quick maintenance effect of quick wearing parts such as sealing and the like by the gear rack mechanism without disassembly is realized.
As shown in figure 1, when the port A is in a zero pressure state, oil pressure is built on one side of the port B connected with the rodless cavity B', the integral piston rod on the port B side extends out, the supporting sleeve acting force is pushed to the rack 15 shaft, the rack 15 is displaced, the supporting rings 14 of the supporting sleeves 13 on two sides are guided through the inner part of the outer cylinder 10, the gear shaft 17 is meshed with the rack 15 to rotate and output torque, and the integral piston rod on the port A side is passively retracted.
In embodiment 2, as shown in fig. 4, the linear displacement output device is an electric cylinder 18, two electric cylinders 18 are respectively connected and fixed at two ends of the box 16, when the electric cylinder 18 at one side is operated to extend, the extension rod pushes the rack 15 to displace, and the electric cylinder operating rod at the other side is retracted, the rack and pinion engages with the drive gear shaft 17 to output torque.
In embodiment 3, as shown in fig. 5, the linear displacement output device is a linear motor 19, two linear motors 19 are respectively connected and fixed at two ends of the box 16, when one linear motor 19 works and extends out, the extension rod pushes the rack 15 to displace, and the other linear motor working rod retracts, the rack and pinion engages with the drive gear shaft 17 to output torque.
Claims (9)
1. A heavy duty rack swing cylinder comprising: box (16) and gear shaft (17), rack (15) of inside setting thereof, box (16) both ends set up respectively one with the linear displacement output device that the rack is parallel, its characterized in that: the linear displacement output device and the rack are of a split structure.
2. The heavy-duty rack swing cylinder according to claim 1, characterized in that: the linear displacement output device is a hydraulic cylinder.
3. The heavy-duty rack swing cylinder according to claim 2, characterized in that: the rod cavity of the hydraulic cylinder is a cavity and is provided with an external communicating port.
4. The heavy-duty rack swing cylinder according to claim 2 or 3, characterized in that: the rack end is provided with a support piece, and the two ends of the box body are provided with guide supports for the support piece to slide in a reciprocating manner.
5. The heavy-duty rack swing cylinder according to claim 4, characterized in that: the support piece is a guide support sleeve (13), the guide support is arranged in an outer barrel (10) between the hydraulic cylinder and the box body, and an isolation cavity is formed between the inner wall of the outer barrel and the hydraulic cylinder as well as between the inner wall of the outer barrel and the box body.
6. The heavy-duty rack swing cylinder according to claim 2, 3 or 5, characterized in that: the hydraulic cylinder comprises a cylinder barrel (2), a piston and a piston rod which are integrally formed.
7. The heavy-duty rack swing cylinder according to claim 2, 3 or 5, characterized in that: the inner side of the port of the cylinder barrel of the hydraulic cylinder is fixedly connected with a guide sleeve matched with a piston rod of the integral piston rod, a shaft seal is arranged in an inner hole of the guide sleeve, and an O-shaped ring is arranged on the periphery of the guide sleeve.
8. The heavy-duty rack swing cylinder according to claim 3, characterized in that: the rod cavity is connected with an oil drainage tank communicated with the atmosphere through a pipeline, and an outlet of the pipeline is positioned above the liquid level of the oil drainage tank.
9. The heavy-duty rack swing cylinder according to claim 5, characterized in that: the hydraulic cylinder is fixedly connected to the box body through a pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147681.5U CN211116894U (en) | 2019-12-04 | 2019-12-04 | Heavy-load rack swing oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147681.5U CN211116894U (en) | 2019-12-04 | 2019-12-04 | Heavy-load rack swing oil cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN211116894U true CN211116894U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922147681.5U Active CN211116894U (en) | 2019-12-04 | 2019-12-04 | Heavy-load rack swing oil cylinder |
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| CN (1) | CN211116894U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777537A (en) * | 2021-02-15 | 2021-05-11 | 山西高行液压股份有限公司 | Heavy-duty driving device |
| CN114526208A (en) * | 2022-02-23 | 2022-05-24 | 重庆津源机械制造有限公司 | Energy-saving and environment-friendly oil pipe conveying oil cylinder |
-
2019
- 2019-12-04 CN CN201922147681.5U patent/CN211116894U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777537A (en) * | 2021-02-15 | 2021-05-11 | 山西高行液压股份有限公司 | Heavy-duty driving device |
| CN112777537B (en) * | 2021-02-15 | 2023-11-28 | 山西高行液压股份有限公司 | Heavy-duty driving device |
| CN114526208A (en) * | 2022-02-23 | 2022-05-24 | 重庆津源机械制造有限公司 | Energy-saving and environment-friendly oil pipe conveying oil cylinder |
| CN114526208B (en) * | 2022-02-23 | 2023-01-24 | 重庆津源机械制造有限公司 | Energy-saving and environment-friendly oil pipe conveying oil cylinder |
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