CN212223997U - Material grabbing arm and material grabbing machine - Google Patents
Material grabbing arm and material grabbing machine Download PDFInfo
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- CN212223997U CN212223997U CN202021716442.3U CN202021716442U CN212223997U CN 212223997 U CN212223997 U CN 212223997U CN 202021716442 U CN202021716442 U CN 202021716442U CN 212223997 U CN212223997 U CN 212223997U
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Abstract
The application provides a grab arm and grab material machine relates to and grabs material mechanical technical field. The material grabbing arm comprises a power output device, a first power arm, a second power arm, a first transmission device and a second transmission device, the first power arm can be installed on the second power arm in a relatively sliding mode, an output shaft of the power output device is connected with the first transmission device and the second transmission device respectively, the first transmission device is used for driving the first power arm to move along the linear direction, the second transmission device is used for driving the second power arm to rotate along the circumferential direction, and the first transmission device and the second transmission device do not output power at the same time. This application realizes through a power take off device that first power arm moves along linear direction, realizes that second power arm drives first power arm circumferential direction, consequently, this application has realized the motion of two directions by a power supply, and simple structure has greatly reduced manufacturing and maintenance cost.
Description
Technical Field
The application relates to the technical field of grabbing machinery, in particular to a grabbing arm and a grabbing machine.
Background
A material grabbing machine is a mechanical device used for grabbing materials, such as sand, stone, wood, etc. In order to grab materials in different ranges, the conventional material grabbing machine mainly has the following two schemes in the implementation mode of a power arm: the first scheme is that the hydraulic oil cylinder drives the telescopic mechanism and the power device drives the rotary mechanism; the second scheme is a fixed arm + a movable lower vehicle assembly + a rotatable upper vehicle assembly.
Although the two schemes are mature at present, the two schemes need at least two power devices for driving, and have complex structure and high manufacturing and maintenance cost.
SUMMERY OF THE UTILITY MODEL
For overcoming the not enough among the prior art, this application provides a grab material arm and grab material machine, realizes the linear motion and the rotation of first power arm through a power take off, simple structure, and manufacturing and maintenance cost are low.
In order to achieve the above object, the present application provides a material grabbing arm and a material grabbing machine, including a power output device, a first power arm, a second power arm, a first transmission device and a second transmission device;
the first power arm is relatively slidably arranged on the second power arm;
the output shaft of power take-off connects respectively first transmission with second transmission, first transmission is used for the drive first power arm moves along the rectilinear direction, second transmission is used for the drive second power arm is along circumferential direction, just first transmission with second transmission does not export power simultaneously.
In a possible embodiment, the first transmission device includes a rack and pinion assembly and a first transmission assembly, the rack and pinion assembly includes a gear member and a rack member in meshing transmission with the gear member, the first transmission assembly includes a first input end and an opposite first output end;
the rack piece is installed on the first power arm and arranged along the linear motion direction of the first power arm, the gear piece is connected with the first output end, and the first input end is connected with an output shaft of the power output device.
In a possible embodiment, the first power arm is provided with a first stroke slot, the gear member is mounted on the first stroke slot, and the gear member is located in the first stroke slot.
In one possible embodiment, further, the first transmission assembly includes one of a one-way coupling or a ratchet mechanism.
In a possible embodiment, the second transmission device includes a second transmission assembly, the second transmission assembly includes a second input end and a second output end, the second input end is connected to the output shaft, and the second output end is connected to the second power arm.
In a possible embodiment, further, the second transmission assembly includes one of a one-way coupling or a ratchet mechanism.
In a possible embodiment, further, a second stroke slot is arranged on the first power arm, the length direction of the second stroke slot is parallel to the linear motion direction of the first power arm, and the second power arm is in sliding fit with the second stroke slot through a transmission shaft.
In a possible embodiment, the material grabbing arm further comprises a return device, and the return device is used for driving the first power arm to move along the direction opposite to the driving direction of the first transmission device.
In a possible embodiment, further, one end of the first power arm, which is far away from the first transmission device, is provided with a working device installation part, and the working device installation part is used for installing a gripping accessory.
In order to achieve the purpose, the application also provides a material grabbing machine, which comprises a machine body, a material grabbing accessory and the material grabbing arm;
the grabbing arm is mounted on the machine body;
the material grabbing accessory is arranged on the material grabbing arm.
Compared with the prior art, the beneficial effects of the application are that:
the utility model provides a grab material arm and grab material machine, it includes a power take off device to grab the material arm, first power arm, second power arm, first transmission and second transmission, but first power arm relative slip's installation is on second power arm, first transmission and second transmission are connected respectively to power take off device's output shaft, first transmission is used for driving first power arm along the motion of rectilinear direction, second transmission is used for driving second power arm along circumferential direction, and first transmission and second transmission do not export power simultaneously. This application drives first transmission and the action of second transmission through a power take off, wherein, the first power arm of first transmission drive moves along linear direction, and second transmission drive second power arm circumferential direction, and second power arm drives first power arm circumferential direction in the lump, consequently, this application has realized the linear motion and the circumferential motion of first power arm by a power take off, simple structure, greatly reduced manufacturing and maintenance cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic perspective view illustrating a material grabbing arm according to an embodiment of the present disclosure;
FIG. 2 illustrates a top view of a grab arm provided by embodiments of the present application;
FIG. 3 shows a cross-sectional view taken along line B-B of FIG. 2;
fig. 4 shows a schematic structural diagram of another material grabbing arm provided by the embodiment of the application.
Description of the main element symbols:
10-a power take-off; 100-an output shaft;
20-a first power arm; 200-a first stroke slot; 201-a second travel slot; 202-a working device mount;
30-a second power arm; 300-a drive shaft;
40-a first transmission; 400-a first transmission assembly; 401-gear member; 402-tooth condition;
50-a backhaul device;
60-a second transmission; 600-second transmission assembly.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example one
Referring to fig. 1 and fig. 3, the present embodiment provides a material grabbing arm for grabbing materials within a predetermined range.
The material grabbing arm comprises a power output device 10, a first power arm 20, a second power arm 30, a first transmission device 40 and a second transmission device 60. Wherein, the output end of the power output device 10 is connected with an output shaft 100, and the output shaft 100 is respectively connected with the first transmission device 40 and the second transmission device 60.
In addition, the first transmission device 40 is connected with the first power arm 20, the power output device 10 transmits power to the first transmission device 40 through the output shaft 100, and the first transmission device 40 outputs power for driving the first power arm 20 to move in a linear direction, that is, the first transmission device 40 gives power to the first power arm 20 in the linear movement direction.
The second transmission device 60 is connected with the second power arm 30, the power output device 10 transmits power to the first transmission device 40 through the output shaft 100, and the first transmission device 40 outputs power for driving the second power arm 30 to rotate along the circumferential direction, that is, the second transmission device 60 gives power for the circumferential rotation of the second power arm 30.
Further, one end of the second power arm 30, which is far away from the second transmission device 60, is connected to the first power arm 20, in other words, the second power arm 30 drives the first power arm 20 to rotate together when rotating circumferentially, that is, the first power arm 20 and the second power arm 30 rotate synchronously. Meanwhile, the second power arm 30 is assembled with the first power arm 20 in a sliding manner, and it can be understood that the first power arm 20 also moves in a linear direction, so that the second power arm 30 is assembled with the first power arm 20 in a sliding manner, so that the first power arm 20 can slide relative to the second power arm 30 when moving in a linear direction, and the second power arm 30 is prevented from interfering the first power arm 20 to move in a linear manner.
In the present embodiment, the first transmission device 40 and the second transmission device 60 do not output power at the same time, and the directions in which the first transmission device 40 and the second transmission device 60 output power are opposite. It is understood that, for example:
when the power output apparatus 10 outputs a clockwise power to the first transmission apparatus 40 and the second transmission apparatus 60 through the output shaft 100, the first transmission apparatus 40 also outputs the power in the same direction, and the first transmission apparatus 40 drives the first power arm 20 to move in a linear direction, whereby the first power arm 20 performs a unidirectional linear motion. Meanwhile, when the power output device 10 outputs a clockwise power through the output shaft 100, the second transmission device 60 does not output power, and the second power arm 30 does not drive the first power arm 20 to perform circumferential rotation at this time.
When the power output apparatus 10 outputs a counterclockwise power to the first transmission apparatus 40 and the second transmission apparatus 60 through the output shaft 100, the first transmission apparatus 40 does not output the power, and thus the first power arm 20 does not perform the linear motion. Meanwhile, when the power output device 10 outputs a counterclockwise power through the output shaft 100, the second transmission device 60 outputs the power in the same direction, the second transmission device 60 drives the second power arm 30 to perform circumferential rotation, and the second power arm 30 drives the first power arm 20 to perform circumferential rotation together.
It should be noted that the above is only an example, and the power output direction of the first transmission device 40 and the power output direction of the second transmission device 60 are not limited to the above-described forms, but other manners are also possible, such as when the power output device 10 outputs a clockwise power to the first transmission device 40 and the second transmission device 60 through the output shaft 100, the first transmission device 40 does not output the power, and the second transmission device 60 outputs the power; when the power output device 10 outputs a counterclockwise power to the first transmission device 40 and the second transmission device 60 through the output shaft 100, the first transmission device 40 outputs the power, and the second transmission device 60 does not output the power, so the above example should not be taken as a limitation of the scope of the present application.
In the present embodiment, the power output apparatus 10 is implemented in various ways as one power source. For example, the power take-off 10 may be an electric or hydraulic motor or the like.
Referring to fig. 2, in the present embodiment, a working device mounting portion 202 is disposed at an end of the first power arm 20 away from the first transmission device 40, that is, a position close to the end of the first power arm 20, and the working device mounting portion 202 is used for mounting a gripping accessory (not shown). As can be understood, the material grabbing accessory is used for grabbing materials, and the material grabbing operation within a certain range can be realized by matching with the action of the first power arm 20.
Further, the material grabbing arm provided by the embodiment further comprises a return device 50, and the return device 50 is used for driving the return movement of the first power arm 20, that is, the return device 50 drives the first power arm 20 to move in the direction opposite to the driving direction of the first transmission assembly 400. It will also be understood that after the first power arm 20 moves in a linear direction, the return means 50 drives the first power arm 20 to move in a direction opposite to the linear direction.
In summary, in the material grabbing arm provided by the present embodiment, when the power output device 10 outputs power in different directions, the corresponding first transmission device 40 and the corresponding second transmission device 60 output corresponding motions, so that motions in two directions, i.e., motions in a linear motion and a circumferential rotation, which are output by the first power arm 20 driven by one power source, i.e., the power output device 10, are realized. The embodiment has the advantages of simple structure and convenience in later maintenance, and saves the manufacturing cost and the cost of subsequent maintenance.
Example two
Referring to fig. 1 to fig. 3, the material grabbing arm provided in this embodiment is further optimized based on the first embodiment, and the main difference is that:
referring to fig. 2 and fig. 3, in the present embodiment, the first transmission device 40 includes a rack and pinion assembly and a first transmission assembly 400, wherein the rack and pinion assembly includes a gear member 401 and a rack member 402 engaged with the gear member 401 for transmission, and the first transmission assembly 400 includes a first input end and an opposite first output end.
The rack member 402 is mounted on the first power arm 20, and the rack member 402 is arranged along the linear movement direction of the first power arm 20, i.e., the length extension direction of the rack member 402 coincides with the linear movement direction of the first power arm 20. The gear member 401 is connected to the first output end of the first transmission assembly 400, the first input end of the first transmission assembly 400 is connected to the output shaft 100 of the power output device 10, therefore, the power output device 10 transmits power to the first input end of the first transmission assembly 400 through the output shaft 100, then the power is transmitted to the gear member 401 through the first output end of the first transmission assembly 400, and then the first power arm 20 is driven to move along the linear direction through the meshing transmission between the gear member 401 and the rack member 402.
Further, a first stroke slot 200 is formed on the first power arm 20, and the position of the first stroke slot 200 is arranged corresponding to the first transmission assembly 400. The rack and pinion assembly is disposed within the first travel slot 200, wherein the rack member 402 is mounted on the first travel slot 200, and in particular, the rack member 402 is mounted on a side wall of one side of the first travel slot 200, and the pinion member 401 is located within the first travel slot 200.
It can be understood that the length direction of the first stroke slot 200 extends along the linear motion direction of the first power arm 20 to ensure that the first power arm 20 can perform linear motion, and the two ends of the first stroke slot 200 can limit the gear element 401. At the same time, the width of the first travel slot 200 is greater than the maximum dimension of the first gear member 401 after engagement with the rack member 402 to ensure that rotation of the gear member 401 within the first travel slot 200 is not interfered.
In some embodiments, the rack member 402 is directly mounted on the side wall of the first power arm 20 without forming the first stroke slot 200, and therefore, a stopper is further mounted at both ends of the rack member 402 to prevent the gear member 401 from being disengaged from the rack member 402.
Further, the first transmission assembly 400 includes one of a first one-way coupling or a first ratchet mechanism, wherein the first one-way coupling or the first ratchet mechanism outputs one-way power, and when the first one-way coupling or the first ratchet mechanism is reversed, the first one-way coupling or the first ratchet mechanism does not output power when the first one-way coupling or the first ratchet mechanism is unloaded.
In this embodiment, the first transmission assembly 400 is a first one-way coupling, which is described below.
It will be appreciated that the first drive assembly 400 is selected for use with a first one-way coupling, and therefore, the first input is located on the inner wall of the first one-way coupling and the first output is located on the outer wall of the first one-way coupling, i.e., the first input and the first output are disposed relatively inside to outside.
Wherein, the output shaft 100 of power take-off 10 is connected to the inner wall of first one-way clutch, and gear part 401 is connected to the outer wall of first one-way clutch, and from this can know, gear part 401 middle part is equipped with the shaft hole, and this shaft hole and first one-way clutch's outer wall looks adaptation. Further, the gear member 401 may be welded or keyed to the outer wall of the first one-way coupling.
In this embodiment, the second transmission device 60 includes a second transmission assembly 600, wherein the second transmission assembly 600 includes a second input end and an opposite second output end, the second input end is connected to the output shaft 100 of the power output device 10, and the second output end is connected to the second power arm 30, so that the power input device transmits power to the second input end of the second transmission assembly 600 through the output shaft 100, and then transmits the power to the second power arm 30 through the second output end of the second transmission assembly 600, thereby driving the second power arm 30 to rotate circumferentially around the rotation center of the second output end of the second transmission assembly 600.
Further, the first power arm 20 is provided with a second stroke groove 201, and the second stroke groove 201 is provided between the first stroke groove 200 and the work implement mounting portion 202 and corresponds to the second power arm 30. The length direction of the second stroke slot 201 is parallel to the linear motion direction of the first power arm 20 and extends along the linear motion direction of the first power arm 20, and the second power arm 30 is in sliding fit with the second stroke slot 201 through the transmission shaft 300.
Specifically, one end of the transmission shaft 300 is movably disposed in the second stroke slot 201, and is in sliding fit with the second stroke slot 201. The other end of transmission shaft 300 is connected with second power arm 30, and the connected mode of transmission shaft 300 and second power arm 30 can be interference fit, key fit or welded fit to avoid transmission shaft 300 to appear rocking, and then avoid producing the impact to first power arm 20 when second power arm 30 carries out circumferential direction.
In some specific embodiments, the transmission shaft 300 and the first power arm 20 may also be engaged with each other through a sliding block assembly, so that the second stroke slot 201 does not need to be formed in the first power arm 20, and only the sliding block assembly is required to be installed.
Further, the second transmission assembly 600 includes one of a second one-way coupling or a second ratchet mechanism, wherein the second one-way coupling or the second ratchet mechanism outputs one-way power, and when the direction is reversed, the second one-way coupling or the second ratchet mechanism does not output power when the direction is idle.
In this embodiment, the second transmission assembly 600 is a second one-way coupling, which will be described below.
It can be appreciated that the second transmission assembly 600 selects the second one-way coupling for use, and therefore, the second input end is located on the inner wall of the second one-way coupling, and the second output end is located on the outer wall of the second one-way coupling, that is, the second input end and the second output end are arranged oppositely inside and outside.
The inner wall of the second one-way coupling is connected with the output shaft 100 of the power output device 10, and the outer wall of the second one-way coupling is connected with the second power arm 30, so that the second power arm 30 is provided with a mounting hole which is matched with the outer wall of the second one-way coupling. Further, the mounting hole can be connected with the outer wall of the second one-way coupling through welding or key connection.
Referring to fig. 4, in the present embodiment, the first transmission assembly 400 and the second transmission assembly 600 respectively adopt a first one-way coupling and a second one-way coupling, so that the output shaft 100 of the power output apparatus 10 passes through the first one-way coupling and the second one-way coupling, and the first one-way coupling and the second one-way coupling are arranged along the output shaft 100 of the power output apparatus 10, wherein the first one-way coupling may be located above the second one-way coupling, and certainly, the first one-way coupling may also be located below the second one-way coupling, which is not limited in the present embodiment, and it can be understood that the second power arm 30 is arranged along with the position of the second one-way coupling.
In this embodiment, the return device 50 includes an operating handle disposed on the first power arm 20, and the operating handle is operated to drive the first power arm 20 to move in a reverse direction along a linear direction, so as to ensure that the first power arm 20 can return to an initial position, thereby enabling the first power arm 20 to achieve a telescopic function.
In other embodiments, the return device 50 further comprises a power driving member, and the power driving member drives the operating handle to return the first power arm 20 to the initial position. The power driving part can be one of a hydraulic oil cylinder, an air cylinder, a linear motor or a hoisting mechanism.
In this embodiment, the telescopic stroke of the first power arm 20 is related to the gear member 401, the transmission shaft 300, the first stroke slot 200 and the second stroke slot 201, and the specific relationship is as follows:
referring to fig. 2, assume that the maximum extension stroke of the first power arm 20 is L0; the addendum circle diameter of the gear piece 401 is a1, the diameter of the mating end of the transmission shaft 300 and the second stroke groove 201 is a2, the length of the first stroke groove 200 is L1, and the length of the second stroke groove 201 is L2, so that the maximum stroke L0 of the first power arm 20 is min (L1-a1, L2-a2), that is, the minimum value of L1-a1 and L2-a2 is taken.
In summary, in the material grabbing arm provided by the embodiment, when the power output device 10 outputs power in different directions, the corresponding first one-way coupling and the corresponding second one-way coupling output corresponding motions, so that the first power arm 20 is driven by one power source, that is, the power output device 10, to output motions in two directions, that is, in a linear direction and in a circumferential direction. The embodiment has a simple structure, is easy to maintain in the later period, and saves the manufacturing cost and the cost of subsequent maintenance.
EXAMPLE III
Referring to fig. 1 to 4, the present embodiment provides a material grabbing machine, which realizes grabbing of materials within a predetermined range.
The material grabbing machine comprises a machine body and a material grabbing arm, wherein the material grabbing arm is arranged on the machine body and is provided by the first embodiment or the second embodiment.
Further, a material grabbing accessory is installed on the working device installation portion 202 of the material grabbing arm and used for grabbing materials, and power of the material grabbing accessory is provided by the material grabbing machine.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A material grabbing arm is characterized by comprising a power output device, a first power arm, a second power arm, a first transmission device and a second transmission device;
the first power arm is relatively slidably arranged on the second power arm;
the output shaft of power take-off connects respectively first transmission with second transmission, first transmission is used for the drive first power arm moves along the rectilinear direction, second transmission is used for the drive second power arm is along circumferential direction, just first transmission with second transmission does not export power simultaneously.
2. The gripper arm of claim 1, wherein the first transmission comprises a rack and pinion assembly and a first transmission assembly, the rack and pinion assembly comprises a gear member and a rack member in meshing transmission with the gear member, and the first transmission assembly comprises a first input end and an opposite first output end;
the rack piece is installed on the first power arm and arranged along the linear motion direction of the first power arm, the gear piece is connected with the first output end, and the first input end is connected with an output shaft of the power output device.
3. The material grabbing arm as claimed in claim 2, wherein the first power arm is provided with a first stroke groove, the gear member is mounted on the first stroke groove, and the gear member is located in the first stroke groove.
4. The grabber arm of claim 2, wherein the first transmission assembly comprises one of a one-way coupling or a ratchet mechanism.
5. The gripper arm of claim 1, wherein the second transmission comprises a second transmission assembly, the second transmission assembly comprising a second input and an opposing second output, the second input being coupled to the output shaft, the second output being coupled to the second power arm.
6. The grab arm of claim 5, in which the second drive assembly comprises one of a one-way coupling or a ratchet mechanism.
7. The material grabbing arm as claimed in claim 5, wherein the first power arm is provided with a second stroke slot, the length direction of the second stroke slot is parallel to the linear motion direction of the first power arm, and the second power arm is in sliding fit with the second stroke slot through a transmission shaft.
8. The gripper arm of claim 1, further comprising a return means for driving the first powered arm in a direction opposite to the direction driven by the first drive means.
9. The material grabbing arm as claimed in any one of claims 1 to 8, wherein one end of the first power arm, which is far away from the first transmission device, is provided with a working device mounting part, and the working device mounting part is used for mounting a material grabbing accessory.
10. A material grabbing machine, which is characterized by comprising a machine body, a material grabbing accessory and a material grabbing arm according to any one of claims 1 to 9;
the grabbing arm is mounted on the machine body;
the material grabbing accessory is arranged on the material grabbing arm.
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| CN202021716442.3U CN212223997U (en) | 2020-08-17 | 2020-08-17 | Material grabbing arm and material grabbing machine |
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| CN202021716442.3U CN212223997U (en) | 2020-08-17 | 2020-08-17 | Material grabbing arm and material grabbing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851616A (en) * | 2020-08-17 | 2020-10-30 | 三一重机有限公司 | Material grabbing arm and material grabbing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111851616A (en) * | 2020-08-17 | 2020-10-30 | 三一重机有限公司 | Material grabbing arm and material grabbing machine |
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