CN114249259B - Rotary driving mechanism, arm support assembly and engineering machinery - Google Patents
Rotary driving mechanism, arm support assembly and engineering machinery Download PDFInfo
- Publication number
- CN114249259B CN114249259B CN202011011724.8A CN202011011724A CN114249259B CN 114249259 B CN114249259 B CN 114249259B CN 202011011724 A CN202011011724 A CN 202011011724A CN 114249259 B CN114249259 B CN 114249259B
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- driving
- output shaft
- cylinder
- piston
- starting
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- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims 2
- 239000003921 oil Substances 0.000 description 31
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
- B66C23/86—Slewing gear hydraulically actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to the field of driving equipment, and discloses a rotary driving mechanism, a jib assembly and an engineering machine, wherein the rotary driving mechanism comprises an output shaft (1) and a driving oil cylinder, a waveform track (2) extending in the circumferential direction is arranged on the output shaft (1), the driving oil cylinder comprises a driving piston (3) capable of reciprocating along the central axis of the output shaft (1), a driving sliding part (4) slidably matched with the track (2) is arranged on the driving piston (3), and the output shaft (1) can be driven to rotate around the central axis through the reciprocating movement of the driving piston (3). Through above-mentioned technical scheme, through the axial reciprocating motion of the drive piston of drive hydro-cylinder, with the help of drive sliding part and orbital cooperation, can drive the output shaft and rotate, be about to the translation motion of drive piston and turn into the moment of torsion and export, simple structure, axial component is less, realizes the reduction of axial dimensions, and whole weight is littleer.
Description
Technical Field
The present invention relates to a drive apparatus, in particular to a rotary drive mechanism, and to an arm support assembly, and also to an engineering mechanism.
Background
The engineering mechanical equipment for the high-altitude operation comprises an arm frame assembly, wherein the arm frame assembly comprises a plurality of arm sections, and relative rotation relation exists between some adjacent arm sections or between the tail arm section and other equipment so as to adapt to operation requirements.
Relative rotation between the arm sections or between the arm sections and other structures can be realized through the amplitude-variable oil cylinder or can be realized through the hydraulic rotary driver. The amplitude-variable oil cylinder needs to be provided with a connecting rod mechanism, and has more components and a complex structure; the hydraulic rotary driver adopts the principle of converting linear motion into rotation, but has more components, complex structure and larger overall weight.
Disclosure of Invention
The invention aims to provide a rotary driving mechanism to solve the problems of complex structure and heavy weight.
In order to achieve the above object, an aspect of the present invention provides a rotary drive mechanism, wherein the rotary drive mechanism includes an output shaft, and a drive cylinder, the output shaft is provided with a circumferentially extending wavy track, the drive cylinder includes a drive piston capable of reciprocating along a central axis of the output shaft, the drive piston is provided with a drive sliding portion slidably engaged with the track, and the output shaft can be driven to rotate around the central axis by the reciprocating movement of the drive piston.
Optionally, the driving mechanism includes a starting cylinder circumferentially spaced from the driving cylinder, the starting cylinder includes a starting piston capable of reciprocating along a central axis of the output shaft, the starting piston is provided with a starting sliding portion slidably engaged with the track, and the output shaft can be driven to rotate around the central axis by the reciprocating movement of the starting piston.
Alternatively, the track comprises complete peaks and troughs, and the wavelengths and amplitudes of the peaks and the troughs are respectively equal.
Optionally, the circumferential spacing between the drive cylinder and the start cylinder is not equal to an integer multiple of half a wavelength of the track.
Alternatively, the track is provided on an outer peripheral surface of the output shaft.
Optionally, the rotary driving mechanism includes a tubular cylinder portion sleeved on the output shaft, and a driving cylinder accommodating the driving piston and a starting cylinder accommodating the starting piston are disposed on an inner circumferential surface of the cylinder portion.
Optionally, the cylinder body is provided with a main oil port communicated with two axial ends of the driving cylinder body and an auxiliary oil port communicated with two axial ends of the starting cylinder body.
Alternatively, the surface of the driving cylinder body facing the output shaft is provided with a first axially extending opening for receiving the driving slider portion therethrough, and the surface of the starting cylinder body facing the output shaft is provided with a second axially extending opening for receiving the starting slider portion therethrough.
In another aspect, the present invention provides a boom assembly, wherein the boom assembly is provided with the rotary drive mechanism of the above aspect.
In addition, the invention also provides engineering machinery, wherein the engineering machinery is provided with the arm support assembly in the scheme.
Through above-mentioned technical scheme, through the axial reciprocating motion of the drive piston of drive hydro-cylinder, with the help of drive sliding part and orbital cooperation, can drive the output shaft and rotate, be about to the translation motion of drive piston and turn into the moment of torsion and export, simple structure, axial component is less, realizes the reduction of axial dimensions, and whole weight is littleer.
Drawings
Fig. 1 is a schematic structural view of a rotary drive mechanism according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic structural diagram of the output tube, the driving piston and the actuating piston according to the embodiment of the present invention.
Description of the reference numerals
1-output shaft, 2-track, 3-driving piston, 4-driving sliding part, 5-starting piston, 6-cylinder part, 7-driving cylinder, 8-main oil port and 9-first opening.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The invention provides a rotary driving mechanism, which comprises an output shaft 1 and a driving oil cylinder, wherein a waveform track 2 extending in the circumferential direction is arranged on the output shaft 1, the driving oil cylinder comprises a driving piston 3 capable of reciprocating along the central axis of the output shaft 1, a driving sliding part 4 slidably matched with the track 2 is arranged on the driving piston 3, and the output shaft 1 can be driven to rotate around the central axis through the reciprocating movement of the driving piston 3.
The output shaft 1 may be a solid shaft or may be a hollow pipe, the track 2 may be formed on the outer circumferential surface of the output shaft 1, and in the case where the output shaft 1 has a hollow structure, the track 2 may be formed on the inner circumferential surface of the output shaft 1.
The track 2 has a waveform, that is, the axial position of the track 2 varies at different positions in the circumferential direction, and such a waveform may be a standard waveform or any other configuration having undulations, as long as there are portions protruding (or recessed) in both axial directions.
The driving oil cylinder comprises a driving piston 3 capable of axially reciprocating, a driving sliding part 4 is arranged on the driving piston 3, the driving sliding part 4 is slidably matched with the track 2, when the driving piston 3 is hydraulically driven to axially move, the driving sliding part 4 also axially moves and simultaneously slides on the track 2, and due to the fact that the track 2 is formed into a wave shape, acting force of the driving sliding part 4 on the track 2 enables the track 2 to rotate around a central axis in the circumferential direction, namely the driving output shaft 1 rotates around the central axis.
Wherein, track 2 can be sunken spout, and is corresponding, and drive sliding part 4 is convex slider, and perhaps track 2 can be convex rib structure, and drive sliding part 4 can be sunken spout.
In this scheme, through the axial reciprocating motion of the drive piston of drive hydro-cylinder, with the help of drive sliding part and orbital cooperation, can drive the output shaft and rotate, be about to the translation motion of drive piston and turn into the moment of torsion and export, simple structure, axial part is less, realizes the reduction of axial dimensions, and whole weight is littleer.
In addition, the driving mechanism comprises a starting oil cylinder which is circumferentially spaced from the driving oil cylinder, the starting oil cylinder comprises a starting piston 5 which can reciprocate along the central axis of the output shaft 1, a starting sliding part which can be slidably matched with the track 2 is arranged on the starting piston 5, and the output shaft 1 can be driven to rotate around the central axis through the reciprocating movement of the starting piston 5. The starting oil cylinder and the driving oil cylinder are of similar structures, and the starting piston 5 drives the output shaft 1 to rotate on the same principle. Particularly, the starting oil cylinder and the driving oil cylinder are circumferentially spaced, so that a small part of the track 2 at the wave crest or the wave trough has no fluctuation in the axial direction, and when the driving sliding part 4 is located at the wave crest or the wave trough of the track 2, the driving sliding part 4 cannot be driven to rotate in the circumferential direction by the axial movement of the driving sliding part 4 and is in a clamping state; and the starting sliding part which keeps an interval with the driving sliding part 4 is not positioned at a wave crest or a wave trough, at the moment, the rail 2 can generate a circumferential initial speed through the axial movement of the starting piston 5, and then the rail 2 is driven to continuously rotate through the driving oil cylinder. Certainly, when the starting sliding part is positioned at a wave crest or a wave trough, the rail can be directly driven by the driving oil cylinder to generate an initial speed.
Further, the track 2 comprises complete peaks and troughs, and the wavelengths and amplitudes of the peaks and the troughs are respectively equal. A full peak corresponds to a half wavelength and a full trough also corresponds to a half wavelength. The number of peaks and valleys may be the same or the difference is 1 so that the track 2 forms a closed loop structure and the wavelength and amplitude thereof are the same, when the frequency of the driving piston 3 axially reciprocating is stabilized, the track 2 can be rotated at a uniform rate.
The circumferential interval between the driving oil cylinder and the starting oil cylinder is not equal to the integral multiple of half wavelength of the track 2. If the circumferential interval between the driving oil cylinder and the starting oil cylinder is odd times of half wavelength, when the driving piston is positioned at a wave trough or a wave crest, the starting piston is positioned at the wave crest or the wave trough, and if the circumferential interval between the driving oil cylinder and the starting oil cylinder is even times of half wavelength, when the driving piston is positioned at the wave trough or the wave crest, the starting piston is positioned at the wave trough or the wave crest, and in this way, the starting piston and the driving piston are simultaneously in a blocking state. Therefore, it is necessary to set the circumferential spacing of the starting piston and the driving piston to a non-integral multiple of half a wavelength, so that at most only one of them is located at a peak or a trough, avoiding both pistons being in a stuck position at the same time.
Alternatively, the track 2 is provided on the outer peripheral surface of the output shaft 1. In other embodiments, as described above, the output shaft 1 may be a hollow tube, and the track 2 may be provided on the inner circumferential surface thereof.
Further, the rotation driving mechanism includes a tubular cylinder portion 6 that is fitted around the output shaft 1, and a driving cylinder 7 that accommodates the driving piston 3 and a starting cylinder that accommodates the starting piston 5 are provided on an inner peripheral surface of the cylinder portion 6. The cylinder portion 6 is integrated with a driving cylinder 7 and a starting cylinder, and the driving cylinder 7 and the starting cylinder are disposed on the inner peripheral surface of the cylinder portion 6 so that the piston therein is engaged with the rail 2. The cylinder section 6 may be a relatively fixed structure with the drive piston 3 and the start piston 5 axially reciprocating relative to the cylinder section 6, while the output shaft 1 rotates relative to the cylinder section 6 about the central axis. Wherein the drive cylinder 7 extends substantially axially to allow the drive piston 3 to move axially therein, and similarly the actuating cylinder extends substantially axially to allow the actuating piston to move axially therein.
The cylinder body part 6 is provided with a main oil port 8 communicated with two axial ends of the driving cylinder body 7 and an auxiliary oil port communicated with two axial ends of the starting cylinder body. Two ends of the driving cylinder 7 are respectively provided with a main oil port 8, as shown in fig. 1, the main oil port 8 is arranged on the outer circumferential surface of the cylinder part 6; the driving piston 3 divides the driving cylinder 7 into two parts which are not communicated with each other, when the main oil port 8 at one end injects hydraulic oil into one part of the driving cylinder 7, the main oil port 8 at the other end can extract the hydraulic oil from the other part of the driving cylinder 7, so that the driving piston 3 moves from one end to the other end; when hydraulic oil is injected from the main oil port 8 at the other end and pumped out from the main oil port 8 at one end, the driving piston 3 is moved from the other end to one end, and the reciprocating movement of the driving piston 3 can be controlled by controlling the injection of hydraulic oil into the driving cylinder 7. The starting cylinder is also operated in a similar manner, and a description thereof is not repeated.
In addition, the surface of the drive cylinder 7 facing the output shaft 1 is provided with an axially extending first opening 9 for receiving the drive slide 4 therethrough, and the surface of the starting cylinder facing the output shaft 1 is provided with an axially extending second opening for receiving the starting slide therethrough. As shown in fig. 2, the cylinder portion 6 has a double structure at the driving cylinder 7, in which the driving piston 3 is accommodated, and a first opening 9 is formed at the inner structure, and the driving sliding portion 4 connected to the driving piston 3 protrudes through the first opening 9 and is engaged with the rail 2; the structure of the starting cylinder is not shown in fig. 2, but it is similar to the driving cylinder, and those skilled in the art can easily conceive the structure of the starting cylinder according to the structure of the driving cylinder. When the drive piston 3 is moved axially, the drive slide 4 is also moved axially in the first opening 9 to drive the track 2 in circumferential rotation.
In addition, the invention also provides an arm frame assembly, wherein the arm frame assembly is provided with the rotary driving mechanism in the scheme. The arm frame assembly comprises a plurality of arm sections, a rotary driving mechanism can be arranged on two adjacent arm sections and can drive the two arm sections to rotate relative to each other, or other rotatable structures such as concrete conveying pipes and the like are arranged on the tail arm section of the arm frame assembly and can be driven to rotate by the rotary driving mechanism.
In addition, the invention also provides engineering machinery, wherein the engineering machinery is provided with the arm support assembly in the scheme. The engineering machinery can be a concrete conveying vehicle, a crane and other high-altitude operation working vehicles, and the jib assembly of the engineering machinery is provided with the rotary driving mechanism.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (9)
1. A rotary driving mechanism is characterized by comprising an output shaft (1) and a driving oil cylinder, wherein a wave-shaped track (2) extending in the circumferential direction is arranged on the output shaft (1), the driving oil cylinder comprises a driving piston (3) capable of moving in a reciprocating mode along the central axis of the output shaft (1), a driving sliding part (4) matched with the track (2) in a sliding mode is arranged on the driving piston (3), and the output shaft (1) can be driven to rotate around the central axis through the reciprocating motion of the driving piston (3);
the driving mechanism comprises a starting oil cylinder which is circumferentially spaced from the driving oil cylinder, the starting oil cylinder comprises a starting piston (5) which can reciprocate along the central axis of the output shaft (1), a starting sliding part which can be slidably matched with the track (2) is arranged on the starting piston (5), and the output shaft (1) can be driven to rotate around the central axis through the reciprocating movement of the starting piston (5).
2. A rotary drive mechanism according to claim 1, wherein the track (2) comprises complete peaks and troughs, and the wavelengths and amplitudes of the peaks and troughs, respectively, are equal.
3. A rotary drive mechanism according to claim 2, wherein the circumferential spacing of the drive ram and the start ram is not equal to an integer multiple of one half wavelength of the track (2).
4. The rotary drive mechanism according to claim 1, characterized in that the track (2) is provided on an outer peripheral surface of the output shaft (1).
5. The rotary drive mechanism according to claim 4, characterized by comprising a tubular cylinder portion (6) fitted around the output shaft (1), and a drive cylinder (7) accommodating the drive piston (3) and a starting cylinder accommodating the starting piston (5) are provided on an inner peripheral surface of the cylinder portion (6).
6. The rotary drive mechanism according to claim 5, characterized in that the cylinder portion (6) is provided with a main oil port (8) communicating with both axial ends of the drive cylinder (7) and an auxiliary oil port communicating with both axial ends of the start cylinder.
7. A rotary drive mechanism according to claim 5, characterized in that the surface of the drive cylinder (7) facing the output shaft (1) is provided with an axially extending first opening (9) for receiving the drive slide (4) therethrough, and the surface of the activation cylinder facing the output shaft (1) is provided with an axially extending second opening for receiving the activation slide therethrough.
8. An arm support assembly, characterized in that the arm support assembly is provided with a rotary drive mechanism according to any one of claims 1-7.
9. A working machine, characterized in that the working machine is provided with a boom assembly according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011011724.8A CN114249259B (en) | 2020-09-23 | 2020-09-23 | Rotary driving mechanism, arm support assembly and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011011724.8A CN114249259B (en) | 2020-09-23 | 2020-09-23 | Rotary driving mechanism, arm support assembly and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114249259A CN114249259A (en) | 2022-03-29 |
| CN114249259B true CN114249259B (en) | 2023-03-24 |
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ID=80788706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011011724.8A Active CN114249259B (en) | 2020-09-23 | 2020-09-23 | Rotary driving mechanism, arm support assembly and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114249259B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT511833B1 (en) * | 2011-11-10 | 2013-03-15 | Schwing Gmbh F | MASTER CONSTRUCTION, ESPECIALLY FOR A AUTOBETON PUMP |
| GB2514807A (en) * | 2013-06-04 | 2014-12-10 | Genius Ip Ltd | Hydraulic and pneumatic drive system |
| DE102014224257A1 (en) * | 2014-11-27 | 2016-06-02 | Robert Bosch Gmbh | linear actuator |
| CN114249256B (en) * | 2020-09-23 | 2023-01-31 | 中联重科股份有限公司 | Rotary driving mechanism, arm support assembly and engineering machinery |
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2020
- 2020-09-23 CN CN202011011724.8A patent/CN114249259B/en active Active
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| Publication number | Publication date |
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| CN114249259A (en) | 2022-03-29 |
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