CN217951049U - Transmission device, actuator and working machine - Google Patents
Transmission device, actuator and working machine Download PDFInfo
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- CN217951049U CN217951049U CN202222340298.3U CN202222340298U CN217951049U CN 217951049 U CN217951049 U CN 217951049U CN 202222340298 U CN202222340298 U CN 202222340298U CN 217951049 U CN217951049 U CN 217951049U
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Abstract
The utility model relates to a transmission field provides a transmission, actuating mechanism and operation machinery. The transmission device comprises a first transmission piece; the second shaft body is provided with a second transmission piece meshed with the first transmission piece, and the second transmission piece is suitable for being switched between a first position and a second position relative to the second shaft body; the straight gear is fixedly connected with the second transmission piece; the fixed gear is arranged on one side of the second shaft body; in the first position, the spur gear is engaged with the fixed gear, and in the second position, the spur gear and the fixed gear are separated from each other. The transmission device can realize transmission self-locking and unlocking of the first transmission piece and the second transmission piece from two directions, does not need to sacrifice the transmission efficiency, and can ensure the effective realization of transmission power.
Description
Technical Field
The utility model relates to a transmission field provides a transmission, actuating mechanism and operation machinery.
Background
At present, a self-locking structure is arranged in a plurality of transmission devices of large machinery, but the self-locking structure in the related technology, such as a worm gear and a worm, and other transmission elements, adopts a smaller helical angle to realize bidirectional self-locking, so that the transmission device has low transmission efficiency and serious abrasion, and the application range is restricted.
SUMMERY OF THE UTILITY MODEL
The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a transmission can realize auto-lock and unblock under the prerequisite of guaranteeing transmission efficiency.
The utility model discloses still provide an actuating mechanism.
The utility model discloses still provide an operation machinery.
An embodiment of a first aspect of the present invention provides a transmission, including:
a first transmission member;
the second shaft body is provided with a second transmission piece meshed with the first transmission piece, and the second transmission piece is suitable for being switched between a first position and a second position relative to the second shaft body;
the straight gear is fixedly connected with the second transmission piece;
the fixed gear is arranged on one side of the second shaft body;
in the first position, the spur gear is engaged with the fixed gear, and in the second position, the spur gear is separated from the fixed gear.
According to the utility model discloses the transmission that the embodiment of first aspect provided, through set up the second driving medium on the second axle body, and set the second driving medium to the form that can switch between primary importance and second place for the second axle body, when the second driving medium is located the primary importance, the second driving medium meshes with first driving medium, straight-teeth gear and fixed gear meshing simultaneously, this moment, no matter first driving medium or second driving medium are as the driving part, all unpowered transmission between first driving medium and the second driving medium, can realize the auto-lock between first driving medium and the second driving medium from this. When the second transmission member is switched from the first position to the second position, the straight gear and the fixed gear are separated from each other, and at the moment, no matter the first transmission member or the second transmission member is used as a driving member, power transmission can be achieved between the first transmission member and the second transmission member. When the second transmission piece is switched from the second position to the first position, the straight gear is meshed with the fixed gear, and no matter the first transmission piece or the second transmission piece is used as the driving piece, no power is transmitted between the first transmission piece and the second transmission piece, so that self-locking between the first transmission piece and the second transmission piece can be realized. That is, the transmission device can realize transmission self-locking of the first transmission piece and the second transmission piece from two directions, transmission efficiency does not need to be sacrificed, and effective realization of transmission power can be guaranteed.
According to an embodiment of the present invention, the first transmission member and the second transmission member are helical gears, or,
the first transmission piece is a worm, and the second transmission piece is a worm wheel.
According to an embodiment of the present invention, in case both the first transmission member and the second transmission member are helical gears, the thickness of the spur gear and the fixed gear is smaller than the thickness of the second transmission member, or,
under the condition that the first transmission piece and the second transmission piece are both helical gears, the thicknesses of the straight gear and the fixed gear are smaller than that of the first transmission piece.
According to the utility model discloses an embodiment, still include first axis body under the first transmission piece is the helical gear the first transmission piece set up in on the first axis body.
According to the utility model discloses an embodiment, the axis of first axis body and the axis of second axis body are parallel to each other.
According to the utility model discloses an embodiment, be provided with two limit structure on the second shaft body at interval, the second driving medium deviates from the one end and one of them of straight-teeth gear be provided with first elastic component between the limit structure, the straight-teeth gear deviates from the one end and the other of second driving medium be provided with the second elastic component between the limit structure.
According to an embodiment of the present invention, the second shaft body is provided with a spline, and the second transmission member is adapted to be slidably connected to the second shaft body through the spline.
According to an embodiment of the invention, the diameter of the second transmission member is greater than or equal to the diameter of the spur gear.
The embodiment of the second aspect of the utility model provides an actuating mechanism, which comprises a driving shaft, a driven shaft and the transmission device;
the driving shaft is connected with one of the first transmission piece and the second shaft body;
the driven shaft is connected with the other of the first transmission piece and the second shaft body.
According to the utility model discloses the actuator that the embodiment of second aspect provided, through setting up foretell transmission, can realize actuator's two-way auto-lock, can also realize actuator's unblock simultaneously.
A third aspect of the present invention provides a working machine, including the above-mentioned transmission device, or the above-mentioned actuating mechanism.
According to the utility model discloses the third aspect embodiment provides operation machinery, through setting up foretell transmission or foretell actuating mechanism, can realize the auto-lock and provide great auto-lock power to operation machinery, can also guarantee operation machinery's transmission efficiency simultaneously.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:
according to the utility model discloses the transmission that the embodiment of first aspect provided, through set up the second driving medium on the second axle body, and set the second driving medium to the form that can switch between primary importance and second place for the second axle body, when the second driving medium is located the primary importance, the second driving medium meshes with first driving medium, straight-teeth gear and fixed gear meshing simultaneously, this moment, no matter first driving medium or second driving medium are as the driving part, all unpowered transmission between first driving medium and the second driving medium, can realize the auto-lock between first driving medium and the second driving medium from this. When the second transmission member is switched from the first position to the second position, the straight gear and the fixed gear are separated from each other, and at the moment, no matter the first transmission member or the second transmission member is used as a driving member, power transmission can be achieved between the first transmission member and the second transmission member. When the second transmission piece is switched from the second position to the first position, the straight gear is meshed with the fixed gear, and no power is transmitted between the first transmission piece and the second transmission piece no matter the first transmission piece or the second transmission piece is used as a driving piece, so that self-locking between the first transmission piece and the second transmission piece can be realized. That is, the transmission device can realize transmission self-locking of the first transmission piece and the second transmission piece from two directions, transmission efficiency does not need to be sacrificed, and effective realization of transmission power can be guaranteed.
Further, according to the utility model discloses the actuating mechanism that the embodiment of second aspect provided, through setting up foretell transmission, can realize actuating mechanism's two-way auto-lock, can also realize actuating mechanism's unblock simultaneously.
Further, according to the utility model discloses third aspect embodiment provides the operation machinery, through setting up foretell transmission or foretell actuating mechanism, can realize the auto-lock and provide great auto-lock power to operation machinery, can also guarantee operation machinery's transmission efficiency simultaneously.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic front view of a transmission according to an embodiment of the present invention;
fig. 2 is a schematic side view of a transmission provided by an embodiment of the present invention;
fig. 3 is a schematic front view of another transmission provided by an embodiment of the present invention;
fig. 4 is a schematic side view of another transmission provided by an embodiment of the present invention.
Reference numerals are as follows:
100. a first transmission member; 102. a second shaft body; 104. a second transmission member; 106. a spur gear; 108. fixing a gear; 110. a first shaft body; 112. a limiting structure; 114. a first elastic member; 116. a second elastic member; 118. a spline.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood as specific cases to those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. 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.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. 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.
As shown in fig. 1 to 4, a transmission device according to an embodiment of the present invention includes a first shaft 110, a second shaft 102, and a fixed gear 108; wherein, the first shaft 110 is provided with a first transmission member 100; the second shaft 102 is provided with a second transmission piece 104 engaged with the first transmission piece 100, and the second transmission piece 104 is suitable for being switched between a first position and a second position relative to the second shaft 102; a straight gear 106 is fixedly connected to the second transmission piece 104; the fixed gear 108 is arranged on one side of the second shaft body 102; in the first position, the spur gear 106 is engaged with the fixed gear 108, and in the second position, the spur gear 106 and the fixed gear 108 are disengaged from each other.
According to the transmission device provided by the embodiment of the first aspect of the present invention, by providing the second transmission member 104 on the second shaft 102, and setting the second transmission member 104 to be switchable between the first position and the second position relative to the second shaft 102, when the second transmission member 104 is located at the first position, the second transmission member 104 is engaged with the first transmission member 100, and the spur gear 106 is engaged with the fixed gear 108, at this time, no power is transmitted between the first transmission member 100 and the second transmission member 104 regardless of whether the first transmission member 100 or the second transmission member 104 is used as the driving member, so that the self-locking between the first transmission member 100 and the second transmission member 104 can be realized. When the second transmission member 104 is switched from the first position to the second position, the spur gear 106 and the fixed gear 108 are separated from each other, and at this time, power transmission can be achieved between the first transmission member 100 and the second transmission member 104 regardless of whether the first transmission member 100 or the second transmission member 104 is used as a driving member. When the second transmission member 104 is switched from the second position to the first position, the spur gear 106 and the fixed gear 108 are engaged, and no power transmission is performed between the first transmission member 100 and the second transmission member 104 whether the first transmission member 100 or the second transmission member 104 is used as a driving member, so that self-locking between the first transmission member 100 and the second transmission member 104 can be realized. That is, the transmission device can realize transmission self-locking of the first transmission piece 100 and the second transmission piece 104 from two directions, and can ensure effective realization of transmission power without sacrificing transmission efficiency.
With reference to fig. 1 to 4, the first transmission member 100 may be a helical gear or a worm, and when the first transmission member 100 is a helical gear, in order to fix the first transmission member 100, the transmission device further includes a first shaft body 110, the first transmission member 100 is disposed on the first shaft body 110, and at this time, the first transmission member 100 is fixedly connected to the first shaft body 110.
When the first transmission member 100 is mounted on the first shaft body 110, the second shaft body 102 may be disposed parallel to the first shaft body 110, and when the first transmission member 100 is a worm, the worm may be disposed perpendicular to the second shaft body 102. Of course, in other embodiments, the first shaft 110 and the second shaft 102 may be disposed at other angles. That is, a preset included angle may be formed between the first shaft 110 and the second shaft 102, and the specific included angle may be flexibly selected according to specific situations.
The second transmission member 104 is disposed on the second shaft 102 and engaged with the first transmission member 100. As mentioned above, since the first transmission member 100 can be a helical gear or a worm, the corresponding second transmission member 104 can be a helical gear or a worm wheel. It should be noted that the second transmission member 104 is not fixedly connected with the second shaft 102, but is connected with the second shaft 102 in a relatively slidable manner, that is, the second transmission member 104 can move relatively to the axial direction of the second shaft 102, and it is understood that the second transmission member 104 can be switched between the first position and the second position relative to the second shaft 102.
According to an embodiment of the present invention, a spline 118 is provided on the second shaft 102, and the second transmission member 104 is slidably connected to the second shaft 102 through the spline 118.
Referring to fig. 1 and 3, in order to realize the sliding connection between the second transmission member 104 and the second shaft 102, a spline 118 is provided on the second shaft 102, and by providing the spline 118, it can be ensured that the second transmission member 104 can move relative to the second shaft 102 along a fixed direction, and the second transmission member 104 is prevented from shifting during the movement relative to the second shaft 102.
According to an embodiment of the present invention, the length of spline 118 is greater than or equal to the thickness of second transmission piece 104.
As described above, in order to ensure the accuracy of the relative sliding between the second transmission member 104 and the second shaft 102, the length of the spline 118 is greater than or equal to the thickness of the second transmission member 104, and by such arrangement, the spline 118 can be ensured to always play a role of guiding during the movement of the second transmission member 104 relative to the second shaft 102.
A spur gear 106 which rotates synchronously with the second transmission member 104 is further disposed at one end of the second transmission member 104, and the spur gear 106 is used for being engaged with or disengaged from a fixed gear 108 to achieve self-locking or unlocking. When the second transmission member 104 is at the first position relative to the second shaft 102, the second transmission member 104 is engaged with the first transmission member 100, and the spur gear 106 is engaged with the fixed gear 108, at this time, since the spur gear 106 is engaged with the fixed gear 108, it is equivalent to locking the relative position between the first transmission member 100 and the second transmission member 104. When the second transmission member 104 is switched from the first position to the second position relative to the second shaft 102, the spur gear 106 and the fixed gear 108 are separated from each other, which is equivalent to unlocking the relative position between the first transmission member 100 and the second transmission member 104, and the transmission of power can be realized whether the first transmission member 100 or the second transmission member 104 is used as a driving member. Accordingly, when the first transmission member 100 is a driving member, the second transmission member 104 can be a driven member, and when the second transmission member 104 is a driving member, the first transmission member 100 can be a driven member.
When the second transmission element 104 is switched from the second position to the first position relative to the second shaft 102, the spur gear 106 and the fixed gear 108 mesh with each other, i.e. the relative position between the first transmission element 100 and the second transmission element 104 is locked again. That is, the embodiment of the utility model provides a transmission can realize two-way auto-lock, also can realize the unblock simultaneously and accomplish power take off, through setting up like this, under the prerequisite of having guaranteed transmission efficiency, still satisfied transmission's auto-lock, unblock function.
According to an embodiment of the present invention, in a case where the first transmission member 100 and the second transmission member 104 are helical gears, the thickness of the spur gear 106 and the fixed gear 108 is smaller than the thickness of the second transmission member 104, or in a case where the first transmission member 100 and the second transmission member 104 are helical gears, the thickness of the spur gear 106 and the fixed gear 108 is smaller than the thickness of the first transmission member 100.
Referring to fig. 1, when the first transmission member 100 and the second transmission member 104 are both helical gears, in order to ensure that the output of the power can still be normally achieved after the spur gear 106 and the fixed gear 108 are separated from each other, the thicknesses of the spur gear 106 and the fixed gear 108 are smaller than the thicknesses of the first transmission member 100 or the second transmission member 104. By this arrangement, when the spur gear 106 and the fixed gear 108 are separated from each other, the first transmission member 100 and the second transmission member 104 can still be engaged to ensure the transmission of power. The thicknesses of the first transmission member 100 and the second transmission member 104 may not be particularly limited as long as power transmission between the first transmission member 100 and the second transmission member 104 can be satisfied.
According to an embodiment of the present invention, two limiting structures 112 are disposed on the second shaft 102 at intervals, a first elastic member 114 is disposed between one end of the second transmission member 104 away from the spur gear 106 and one of the limiting structures 112, and a second elastic member 116 is disposed between one end of the second transmission member 104 away from the other limiting structure 112.
Referring to fig. 1 and 3, in order to achieve automatic resetting of second transmission member 104, two limiting structures 112 are disposed at intervals on second shaft 102, where the limiting structures 112 may be boss structures formed on second shaft 102, and second transmission member 104 and spur gear 106 are disposed between two limiting structures 112. A first elastic member 114 is provided between the limit structure 112 and the second transmission member 104 on the left side, and a second elastic member 116 is provided between the limit structure 112 and the spur gear 106 on the right side.
The following explains a specific use of the transmission device provided in the embodiment of the first aspect of the present invention:
taking the first shaft 110 as an example, when the first shaft 110 rotates in a forward direction, the first transmission element 100 is engaged with the second transmission element 104, and the second transmission element 104 is at the first position, because the spur gear 106 is engaged with the fixed gear 108, the first transmission element 100 can only provide an axial driving force for the second transmission element 104 to move along the axial direction of the second shaft 102 when rotating, and at this time, the second transmission element 104 moves along the axial direction of the second shaft 102, and along with the movement of the second transmission element 104, the second transmission element 104 is switched from the first position to the second position, and at this time, the spur gear 106 is separated from the fixed gear 108 and presses the second elastic element 116. When the spur gear 106 and the fixed gear 108 are separated from each other, power transmission between the first transmission member 100 and the second transmission member 104 is resumed, and the second transmission member 104 drives the second shaft 102 to rotate to realize power output. When the first shaft 110 stops rotating, the second elastic element 116 exerts an elastic restoring force on the spur gear 106 to the left as shown in fig. 1, so that the second transmission element 104 is switched from the second position to the first position. Here, two different situations are also possible, in which the spur gear 106 and the fixed gear 108 can just engage, so that the first transmission member 100 and the second transmission member 104 can be self-locked. If the spur gear 106 and the fixed gear 108 are staggered, since the first shaft 110 stops rotating, self-locking is not needed. If the first shaft body 110 continues to rotate, the staggered teeth between the spur gear 106 and the fixed gear 108 are coupled with each other along with the rotation of the first shaft body 110, and when the spur gear 106 is meshed with the fixed gear 108, the self-locking of the first transmission member 100 and the second transmission member 104 can be realized.
Similarly, when the first shaft 110 rotates reversely, the action principle is similar to the above, and is not described again here. Alternatively, when the second shaft 102 is a driving shaft, the action principle is similar to the above.
The embodiment of the second aspect of the utility model provides an actuating mechanism, which comprises a driving shaft, a driven shaft and the transmission device; the driving shaft is connected with one of the first transmission piece 100 and the second shaft body 102; the driven shaft is connected to the other of the first transmission 100 and the second shaft 102.
According to the utility model discloses the actuator that the embodiment of second aspect provided, through setting up foretell transmission, can realize actuator's two-way auto-lock, can also realize actuator's unblock simultaneously.
The utility model discloses the actuating mechanism that the embodiment of second aspect provided can be gear box, speed reducer etc.. As described above, when the driving shaft is connected to the first transmission member 100, the driven shaft is connected to the second shaft 102, and when the driving shaft is connected to the second shaft 102, the driven shaft is connected to the first transmission member 100. By such an arrangement, the operation modes of the first transmission member 100 and the second shaft body 102 can be flexibly switched.
A third aspect of the present invention provides a working machine, including the above-mentioned transmission device, or the above-mentioned actuating mechanism.
According to the utility model discloses the third aspect embodiment provides operation machinery, through setting up foretell transmission or foretell actuating mechanism, can realize the auto-lock and provide great auto-lock power to operation machinery, can also guarantee operation machinery's transmission efficiency simultaneously.
The utility model discloses the operation machinery that the third aspect embodiment provided can be digs machine, hoist etc..
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A transmission, comprising:
a first transmission member (100);
a second shaft body (102), wherein a second transmission piece (104) engaged with the first transmission piece (100) is arranged on the second shaft body (102), and the second transmission piece (104) is suitable for being switched between a first position and a second position relative to the second shaft body (102);
the straight gear (106) is fixedly connected with the second transmission piece (104);
a fixed gear (108) provided at one side of the second shaft body (102);
in the first position, the spur gear (106) is engaged with the fixed gear (108), and in the second position, the spur gear (106) and the fixed gear (108) are disengaged from each other.
2. Transmission according to claim 1, wherein said first transmission member (100) and said second transmission member (104) are helical gears or,
the first transmission piece (100) is a worm, and the second transmission piece (104) is a worm wheel.
3. Transmission according to claim 2, characterized in that, in the case where said first transmission member (100) and said second transmission member (104) are both helical gears, the thickness of said spur gear (106) and of said fixed gear (108) is less than the thickness of said second transmission member (104), or,
in the case that the first transmission member (100) and the second transmission member (104) are both helical gears, the thickness of the spur gear (106) and the fixed gear (108) is smaller than that of the first transmission member (100).
4. A transmission according to claim 2, further comprising a first shaft body (110), wherein in case the first transmission member (100) is a helical gear, the first transmission member (100) is arranged on the first shaft body (110).
5. Transmission according to claim 4, characterized in that the axis of the first shaft body (110) and the axis of the second shaft body (102) are mutually parallel.
6. The transmission device according to claim 1, wherein two limiting structures (112) are provided at intervals on the second shaft body (102), a first elastic member (114) is provided between one end of the second transmission member (104) facing away from the spur gear (106) and one of the limiting structures (112), and a second elastic member (116) is provided between one end of the spur gear (106) facing away from the second transmission member (104) and the other limiting structure (112).
7. A transmission arrangement as claimed in any one of claims 1 to 6, characterised in that the second shaft body (102) is provided with splines (118), the second transmission member (104) being adapted to be slidably connected to the second shaft body (102) by means of the splines (118).
8. Transmission according to claim 7, characterized in that the length of the splines (118) is greater than or equal to the thickness of the second transmission piece (104).
9. An actuator comprising a drive shaft, a driven shaft and a transmission according to any one of claims 1 to 8;
the drive shaft is connected with one of the first transmission piece (100) and the second shaft body (102);
the driven shaft is connected to the other of the first transmission member (100) and the second shaft body (102).
10. A working machine, comprising a transmission according to any of claims 1-8, or an actuator according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222340298.3U CN217951049U (en) | 2022-08-31 | 2022-08-31 | Transmission device, actuator and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222340298.3U CN217951049U (en) | 2022-08-31 | 2022-08-31 | Transmission device, actuator and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217951049U true CN217951049U (en) | 2022-12-02 |
Family
ID=84212237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222340298.3U Active CN217951049U (en) | 2022-08-31 | 2022-08-31 | Transmission device, actuator and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217951049U (en) |
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2022
- 2022-08-31 CN CN202222340298.3U patent/CN217951049U/en active Active
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