CN211471990U - Railway maintenance working device frame - Google Patents
Railway maintenance working device frame Download PDFInfo
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- CN211471990U CN211471990U CN201920947193.XU CN201920947193U CN211471990U CN 211471990 U CN211471990 U CN 211471990U CN 201920947193 U CN201920947193 U CN 201920947193U CN 211471990 U CN211471990 U CN 211471990U
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- frame
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- unit mounting
- rotating
- railway maintenance
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Abstract
The utility model provides a railway maintenance equipment frame, includes interior rotation sideslip device (1), outer rotatory sideslip device (2), operation unit mounting bracket (3), outer rotatory sideslip device (2) of interior rotation sideslip device (1) external connection, operation unit mounting bracket (3) are connected respectively in interior rotation sideslip device (1) and outer rotatory sideslip device (2), interior rotation sideslip device (1) contains interior fixed beam (111) and interior rotatory roof beam (112), interior fixed beam (111) and interior rotatory roof beam (112) are connected. The utility model provides a demand of the different position operations of operation unit can be realized to railway maintenance equipment frame, can rotate the sideslip action, and compact structure, flexible operation and portable scope are great, have solved current railway maintenance equipment frame construction and have not compacted, the less scheduling problem of moving range.
Description
Technical Field
The utility model relates to a railway maintenance equipment frame belongs to railway maintenance mechanical design and makes technical field.
Background
When the road maintenance machine meets the turnout, curve and other sections during railway construction or maintenance, operation units for a track bed, a steel rail, a sleeper and a fastener are required to move, such as tamping operation, steel rail maintenance operation, sleeper replacement operation, fastener installation and maintenance operation and the like. These movements may include rotational and traversing movements, and the work units are typically mounted on a frame that is capable of rotational and traversing movements to effect movement of the work units. The existing rotary traversing frame has the defects of too large structure or small moving range, so that the railway maintenance working device frame which is compact in structure and large in moving range needs to be developed.
For example, chinese patent publication No. CN105658872A discloses a tamping machine having a rotatably mounted working frame, which provides a tamping machine. The tamping machine has a machine frame and an assembly frame which is arranged between and movable on the rails via the running gear and which is connected with the machine frame for longitudinal movement via a frame support. Between the running gear and the frame support, a vertically adjustable tamping unit and a rail lifting unit are provided. The frame support is connected to the machine frame for pivoting about a support shaft extending in the longitudinal direction of the machine. But still has the disadvantages of bulky frame structure and small moving range.
SUMMERY OF THE UTILITY MODEL
The utility model provides a railway maintenance equipment frame realizes the demand of the different position operations of operation unit, can rotate the sideslip action, and compact structure, flexible operation and portable scope are great, have solved current railway maintenance equipment frame construction not compact, and the moving range is less scheduling problem.
The utility model discloses a following technical scheme realizes: the utility model provides a railway maintenance equipment frame, its includes interior rotation sideslip device, outer rotation sideslip device, operation unit mounting bracket, the outer rotation sideslip device of interior rotation sideslip device external connection, interior rotation sideslip device reaches outer rotation sideslip device connects respectively the operation unit mounting bracket, interior rotation sideslip device contains interior fixed beam and interior rotatory roof beam, and interior fixed beam and interior rotatory roof beam are connected.
Preferably, the outer rotary traversing device adopts a telescopic arm structure.
Preferably, the outer rotary traverse devices are arranged in the working direction in front of and behind the working position of the inner rotary traverse device, and at least one set of the outer rotary traverse devices is arranged on each of the front and rear sides.
Preferably, the inner rotating traversing device comprises an inner rotating device and an inner traversing device, and the inner traversing device is connected with the inner rotating device and is respectively used for realizing rotating and traversing actions.
Preferably, the inner rotating device comprises the inner fixed beam and the inner rotating beam, the inner fixed beam is connected with the inner rotating beam, and the inner rotating beam rotates around the inner fixed beam.
Preferably, the inner fixed beam and the inner rotating beam are connected by an inner rotating shaft.
The internal fixation roof beam is connected in the internal fixation frame, and the internal fixation roof beam all connects in road maintaining machinery automobile body with the internal fixation frame, internal rotation roof beam and internal rotation frame fixed connection.
One end of the internal rotation driving mechanism is connected with the internal rotation beam, and the other end of the internal rotation driving mechanism is connected with the internal fixing frame.
When the internal rotation driving mechanism acts, the internal rotation beam drives the internal rotation frame to rotate by taking the internal rotation shaft as a center, and further the rotation action is realized.
The operation unit mounting frame comprises an inner operation unit mounting frame and an outer operation unit mounting frame. The inner operation unit mounting frame is mounted on the inner rotating transverse moving device, and the inner rotating transverse moving device is used for realizing rotating transverse moving action, so that the operation unit can operate the inner side position of the steel rail conveniently. The outer operation unit mounting frame is mounted on the outer rotating and transversely moving device, and the rotating and transversely moving action is realized through the outer rotating and transversely moving device, so that the operation unit can operate the outer position of the steel rail and the position far away from the steel rail.
The inner transverse device comprises an inner transverse guide pillar, an inner transverse guide sleeve and an inner transverse driving mechanism; the inner transverse guide sleeve is arranged on the inner transverse guide pillar and can slide along the inner transverse guide pillar; an inner operation unit mounting frame is arranged on the inner transverse guide sleeve.
One end of the inner transverse moving driving mechanism is connected with the inner operation unit mounting frame, the other end of the inner transverse moving driving mechanism is connected with the inner fixing frame, and when the inner transverse moving driving mechanism acts, the inner operation unit mounting frame is driven to move along the inner transverse moving guide pillar, so that transverse moving action is realized.
The inner transverse moving guide column is connected with the inner rotating frame, so that when the inner rotating frame rotates, the inner transverse moving guide column also rotates, and the inner operation unit mounting frame is driven to rotate. Therefore, the inner operation unit mounting frame can perform the rotary transverse movement action under the simultaneous action of the inner rotary driving mechanism and the inner transverse movement driving mechanism.
The inner operation unit mounting frame is used for mounting the operation unit, and then the rotation and transverse movement of the operation unit are realized.
The external rotating transverse moving device comprises an external rotating device and an external transverse moving device which are respectively used for realizing rotating and transverse moving actions.
The outer rotating device comprises a first outer rotating shaft, a first outer rotating driving mechanism, a second outer rotating shaft and a second outer rotating driving mechanism.
The outer traversing device comprises an outer telescopic arm and an outer traversing driving mechanism. The outer telescopic arm comprises a multi-layer guide sleeve structure, so that telescopic action can be performed.
Outer telescopic boom one end is connected with the road maintaining machinery automobile body through first outer rotation axis, and the other end passes through the outer rotation axis of second and is connected with outer operation unit mounting bracket. When the outer transverse moving driving mechanism acts, the outer telescopic arm stretches and retracts to drive the outer operation unit mounting frame to move transversely. When the first external rotation driving mechanism acts, the external telescopic arm is driven to rotate around the first external rotating shaft, and then the external operation unit mounting frame is driven to rotate. When the second external rotation driving mechanism acts, the external operation unit mounting frame is driven to rotate around the second external rotation shaft, and further rotation action is realized.
The outer rotating device has two rotating points, namely a connecting point of the first outer rotating shaft and the road maintenance machine body and a connecting point between the first outer rotating shaft and the second outer rotating shaft, so that the rotating action flexibility is higher.
Under the simultaneous action of the first outer rotation driving mechanism, the second outer rotation driving mechanism and the outer transverse moving driving mechanism, the outer operation unit mounting frame can perform the rotation transverse moving action.
The outer operation unit mounting frame is used for mounting the operation unit, and then the rotation and transverse movement of the operation unit are realized.
The operation unit mounting frame is not limited to a frame form, can be changed according to the structural characteristics of the mounted operation unit, and can be simplified into a mounting lifting point or a mounting plate.
Preferably, a connectable structure is adopted between the inner operation unit mounting frame and the outer operation unit mounting frame. And the inner operation unit mounting frame and the outer operation unit mounting frame are connected or unlocked through the inner and outer operation unit mounting frame locking mechanism.
When the operation unit does not need to carry out remote operation, the inner operation unit mounting frame and the outer operation unit mounting frame can be mutually and fixedly connected and are uniformly controlled to act by the inner rotation transverse moving device.
When the operation unit needs to carry out remote operation, the inner operation unit mounting frame and the outer operation unit mounting frame are mutually unlocked, the inner operation unit mounting frame is controlled by the inner rotary transverse moving device to move, and the outer operation unit mounting frame is controlled by the outer rotary transverse moving device to move.
Preferably, two sets of installation of interior operation unit mounting bracket for inboard operation, preferably installation two sets of installation of outer operation unit mounting bracket for the operation of outside.
The outer telescopic arm preferably adopts a three-stage guide sleeve structure, and the more the stage number is, the longer the distance of the outer end of the outer telescopic arm can be reached.
Preferably, the inner frame includes an inner frame guide groove, preferably disposed at an inner frame edge, or more preferably, uniformly disposed at four corners of the inner frame edge.
The end part of the inner rotating frame is connected with the end part of the inner transverse guide post, and a connecting point formed by connecting the end part of the inner rotating frame and the end part of the inner transverse guide post is lapped in the guide groove of the fixed frame.
Because the internal rotation frame and the internal transverse moving guide pillar are in lap joint in the internal fixing frame guide groove, the gravity generated by the operation unit, the internal operation unit mounting frame, the internal rotation frame, the internal transverse moving guide pillar and other parts is directly transmitted to the internal fixing frame mainly through the internal fixing frame guide groove, and then transmitted to the road maintenance machinery body, the gravity is prevented from acting on the internal rotation shaft, the stress of the whole rotation frame is improved, and the reliability and the service life are improved.
The utility model provides a demand of the different position operations of operation unit can be realized to railway maintenance equipment frame, can rotate the sideslip action, and compact structure, flexible operation and portable scope are great, have solved current railway maintenance equipment frame construction and have not compacted, the less scheduling problem of moving range.
The internal rotation frame and the internal transverse moving guide post are in lap joint in the internal fixing frame guide groove, gravity generated by the operation unit, the internal operation unit mounting frame, the internal rotation frame, the internal transverse moving guide post and the like is mainly and directly transmitted to the internal fixing frame through the internal fixing frame guide groove, and then transmitted to the road maintenance machinery vehicle body, so that the gravity is prevented from acting on the rotation shaft, the stress of the whole internal rotation frame is improved, and the reliability and the service life are improved.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of a frame of a railway maintenance work device according to the present invention;
FIG. 2 is a front view of the railway maintenance work device frame of the embodiment shown in FIG. 1;
FIG. 3 is a top view of the railway maintenance work device frame of the embodiment shown in FIG. 1;
FIG. 4 is a schematic view of the inner rotary traverse device of the embodiment of FIG. 1;
FIG. 5 is a schematic view of the outer rotary traversing device of the embodiment shown in FIG. 1;
FIG. 6 is a schematic view of the outer rotary racking device of the railway maintenance work device frame of the embodiment of FIG. 1 in an extended configuration;
FIG. 7 is a schematic view of the outer rotary traversing device of the embodiment shown in FIG. 6;
FIG. 8 is a schematic illustration of the railway maintenance work device frame of the embodiment of FIG. 1 with a tamping work unit installed;
the numerical designations in fig. 1-8 mean:
1 inner rotary traverse device 11 inner rotary device 12 inner traverse device 2 outer rotary traverse device
21 outer rotating device 22 outer traversing device 3 operation unit mounting rack
4 internal and external operation unit mounting frame locking mechanism 111 internal fixed beam 112 internal rotating beam
113 inner rotary shaft 114 and inner fixed frame 115 and inner rotary driving mechanism 116
Internal transverse moving driving mechanism of internal transverse moving guide post 122 internal transverse moving guide sleeve 123 of 121
31 inner working unit mount 211 first outer rotary shaft 212 first outer rotary drive mechanism
213 second outer rotary shaft 214 second outer rotary drive mechanism 221 outer telescopic arm
222 outside traverse drive mechanism 31 inside unit mount 32 outside unit mount.
Detailed Description
In this embodiment, the direction along which the rails extend is the longitudinal direction, and the direction parallel to the ties is the transverse direction.
Example 1.1 as shown in fig. 1 to 3, a frame of a railway maintenance work device includes an inner rotary traverse device 1, an outer rotary traverse device 2, and a working unit mounting frame 3. The inner rotating traverse device 1 includes an inner rotating device 11 and an inner traverse device 12 for effecting a rotating action and a traversing action, respectively. The outer rotary traversing device 2 comprises an outer rotary device 21 and an outer traversing device 22 for performing a rotary motion and a traversing motion, respectively.
As shown in fig. 4, the inner rotating device 11 includes an inner fixed beam 111, an inner rotating beam 112, an inner rotating shaft 113, an inner fixed frame 114, an inner rotating frame 115, and an inner rotating drive mechanism 116. The inner fixed beam 111 and the inner fixed frame 114 are both fixed on the road maintenance machinery vehicle body, and the inner rotating beam 112 is fixedly connected with the inner rotating frame 115; one end of the internal rotation driving mechanism 116 is connected to the internal rotation beam 112, and the other end of the internal rotation driving mechanism 116 is connected to the internal fixing frame 114. The inner fixed beam 111 and the inner rotating beam 112 are connected by an inner rotating shaft 113. When the inner rotation driving mechanism 116 is activated, the inner rotation beam 112 drives the inner rotation frame 115 to rotate around the inner rotation shaft 113, thereby realizing a rotation operation.
The inner-traverse device 12 includes an inner-traverse guide post 121, an inner-traverse guide bush 122, and an inner-traverse driving mechanism 123. The inner-traverse guide sleeve 122 is mounted to the inner-traverse guide post 121 so that the inner-traverse guide sleeve 122 can slide along the inner-traverse guide post 121. The inner operation unit mounting frame 31 is mounted on the inner traverse guide 122. The inner lateral movement driving mechanism 123 has one end connected to the inner working unit mounting frame 31 and the other end connected to the inner fixing frame 114. When the inner transverse moving driving mechanism 123 acts, the inner operation unit mounting rack 31 is driven to move along the inner transverse moving guide post 121, and then transverse moving action is realized. In this embodiment, two sets of inner work unit mounts 31 are installed for inner work.
In this embodiment, the inner frame 114 includes an inner frame guide channel, which is preferably disposed at the edge of the inner frame 114, or more preferably, uniformly disposed at the four corners of the edge of the inner frame 114.
The end of the inner rotating frame 115 is connected to the end of the inner traversing guide post 121, and the connecting point between the end of the inner rotating frame 115 and the end of the inner traversing guide post 121 is connected to the fixed frame guide slot, so that when the inner rotating driving mechanism 16 acts, the inner rotating beam 112 is driven to rotate to drive the inner rotating frame 115 to rotate, and further to drive the inner traversing guide post 121 to rotate, and then to drive the inner traversing guide sleeve 122 and the inner operation unit mounting frame 31 to rotate, thereby realizing the transmission of the rotation.
Because the inner rotating frame 115 and the inner transverse guide post 121 are lapped in the inner fixing frame guide groove, the gravity generated by the parts such as the operation unit, the inner operation unit mounting frame 31, the inner rotating frame 115 and the inner transverse guide post 121 is directly transmitted to the inner fixing frame 114 mainly through the inner fixing frame guide groove, and then transmitted to the road maintenance machinery body, the gravity is prevented from acting on the inner rotating shaft 113, the stress of the whole rotating frame is improved, and the reliability and the service life are improved.
The inner traversing guide posts 121 are also interconnected to the inner rotating frame 115, so that when the inner rotating frame 115 rotates, the inner traversing guide posts 121 also rotate, which in turn rotates the inner operating unit mounting bracket 31. Therefore, the inner working unit mount 31 can perform the rotational traverse operation by the simultaneous operation of the inner rotational drive mechanism 116 and the inner traverse drive mechanism 123. The inner working unit mounting frame 31 is used for mounting the working unit, and then the rotary transverse movement action of the working unit is realized.
As shown in fig. 5, the outer rotating device 21 includes a first outer rotating shaft 211, a first outer rotating drive mechanism 212, a second outer rotating shaft 213, and a second outer rotating drive mechanism 214. The outer traverse device 22 includes an outer telescopic arm 221 and an outer traverse driving mechanism 222. The outer telescopic arm 221 is formed of a multi-layered guide sleeve structure and can perform a telescopic operation.
One end of the outer telescopic arm 221 is hinged to the body of the road maintenance machine through a first outer rotating shaft 211, and the other end of the outer telescopic arm 221 is hinged to the outer operation unit mounting frame 32 through a second outer rotating shaft 213. When the outer traverse driving mechanism 222 is operated, the outer telescopic arm 221 is extended and contracted to drive the outer working unit mounting frame 32 to perform a traverse operation. When the first external rotation driving mechanism 212 is activated, the first external telescopic arm 221 is driven to rotate around the first external rotation axis 211, and the first external operation unit mounting frame 32 is driven to rotate. When the second external rotation driving mechanism 214 acts, the external operation unit mounting bracket 32 is driven to rotate around the second external rotation axis 213, so as to realize further rotation.
Since the outer rotating means 21 has two rotating points of the first outer rotating shaft 211 and the second outer rotating shaft 213, the flexibility of the rotating motion is greater. The outer working unit attachment frame 32 can perform the rotational traversing operation by the combined action of the first outer rotational driving mechanism 212, the second outer rotational driving mechanism 214, and the outer traversing driving mechanism 222. The outer working unit mounting frame 32 is used for mounting the working unit, and then the rotary and transverse movement of the working unit is realized.
In this embodiment, two sets of external work unit mounts 32 are preferably installed for external work. The outer telescopic arm 221 preferably adopts a three-stage guide sleeve structure, and the more the stages are, the longer the distance of the outer end of the outer telescopic arm can be reached.
As shown in fig. 2, in the present embodiment, it is preferable that the inside and outside working unit mount locking mechanism 4 is installed between the inside working unit mount 31 and the outside working unit mount 32, and the inside working unit mount 31 and the outside working unit mount 32 are connected or unlocked by the inside and outside working unit mount locking mechanism 4. When the operation unit does not need to perform remote operation, the inner operation unit mounting frame 31 and the outer operation unit mounting frame 32 can be fixedly connected with each other, and the operation can be controlled by the inner rotary traverse device 1. When the operation unit needs to carry out remote operation, the inner operation unit mounting frame 31 and the outer operation unit mounting frame 32 are mutually unlocked, the inner operation unit mounting frame 31 is controlled to move by the inner rotary transverse moving device 1, the outer operation unit mounting frame 32 is controlled to move by the outer rotary transverse moving device 2, and the inner operation unit mounting frame 31 and the outer operation unit mounting frame 32 operate independently and do not interfere with each other.
Fig. 6 is a structural view of a frame of a railway maintenance work device in an extended state of the external rotation traverse device, fig. 7 is a structural view of the external rotation traverse device in an extended state, and the external telescopic arm 221 in fig. 6 adopts a three-stage guide sleeve structure. It can be seen that the end of the outer telescopic boom 221 can reach a distance far from the center of the frame of the railway maintenance working device, thereby realizing the remote operation of the operation unit.
Figure 8 shows a block diagram of the railway maintenance work device frame with the work units being tamping units, one tamping unit being mounted on each work unit mounting bracket. The structure is suitable for tamping operation in turnout zones, and can also be used for tamping operation on a track bed at a curved track of a steel rail.
Example 1.2A railway maintenance work device frame, the difference with the example 1.1 is that: the inner frame guide is eliminated, and the weight generated by the working unit, the inner working unit mounting frame 31, the inner rotating frame 115, the inner traverse guide 121, and the like is transmitted to the body of the road maintenance machine through the inner rotating shaft 113.
Example 1.3A railway maintenance work device frame, the difference with the example 1.1 is that: the inner and outer work unit frames are replaced with mounting lifting points.
Example 1.4A railway maintenance work device frame, the difference with the example 1.1 is that: the inner work unit frame and/or the outer work unit frame is replaced with a mounting plate.
Claims (16)
1. The utility model provides a railway maintenance equipment frame which characterized in that: the internal rotation transverse moving device comprises an internal rotation transverse moving device (1), an external rotation transverse moving device (2), an operation unit mounting frame (3), the internal rotation transverse moving device (1) is externally connected with the external rotation transverse moving device (2), the internal rotation transverse moving device (1) and the external rotation transverse moving device (2) are respectively connected with the operation unit mounting frame (3), the internal rotation transverse moving device (1) comprises an internal fixed beam (111) and an internal rotating beam (112), and the internal fixed beam (111) is connected with the internal rotating beam (112).
2. A railway maintenance work device frame as claimed in claim 1, wherein: the outer rotary traversing device (2) is arranged in front of and behind the operation position of the inner rotary traversing device along the operation direction, and at least one set of outer rotary traversing device is arranged on each side of the front and the back.
3. A railway maintenance working device frame as claimed in claim 1 or 2, wherein: the inner rotating traversing device (1) comprises an inner rotating device (11) and an inner traversing device (12), and the inner traversing device (12) is connected with the inner rotating device (11).
4. A railway maintenance work device frame as claimed in claim 3, wherein: the inner rotating beam (112) is fixedly connected with the inner rotating frame (115), and the inner fixing beam (111) and the inner fixing frame (114) are both connected to the road maintenance machine body.
5. A railway maintenance work device frame as claimed in claim 1, 2 or 4, wherein: one end of the internal rotation driving mechanism (116) is connected with the internal rotation beam (112), and the other end is connected with the internal fixed frame (114).
6. A railway maintenance work device frame as claimed in claim 5, wherein: the operation unit mounting frame (3) comprises an inner operation unit mounting frame (31) and an outer operation unit mounting frame (32); the inner operation unit mounting frame (31) is mounted on the inner rotation transverse moving device (1); the external operation unit mounting frame (32) is mounted on the external rotary traverse device (2).
7. A railway maintenance work device frame as claimed in claim 3, wherein: the inner transverse device (12) comprises an inner transverse guide post (121), an inner transverse guide sleeve (122) and an inner transverse driving mechanism (123); the inner transverse guide sleeve (122) is arranged on the inner transverse guide post (121) and can slide along the inner transverse guide post; an inner operation unit mounting frame (31) is arranged on the inner transverse guide sleeve (122).
8. A railway maintenance work device frame as claimed in claim 7, wherein: one end of the inner transverse moving driving mechanism (123) is connected with the inner operation unit mounting frame (31), the other end of the inner transverse moving driving mechanism is connected with the inner fixing frame (114), and when the inner transverse moving driving mechanism (123) acts, the inner operation unit mounting frame (31) is driven to move along the inner transverse moving guide post (121), and then transverse moving action is achieved.
9. A railway maintenance working device frame as claimed in claim 7 or 8, wherein: the inner transverse moving guide post (121) is connected with the inner rotating frame (115).
10. A railway maintenance work device frame as claimed in any one of claims 1, 2, 4, or 6 to 8, wherein: the outer rotating traverse device (2) comprises an outer rotating device (21) and an outer traverse device (22).
11. A railway maintenance work device frame as claimed in claim 10, wherein: the outer rotating device (21) includes a first outer rotating shaft (211), a first outer rotating drive mechanism (212), a second outer rotating shaft (213), and a second outer rotating drive mechanism (214).
12. A railway maintenance work device frame as claimed in claim 10, wherein: the outer traversing device (22) comprises an outer telescopic arm (221) and an outer traversing driving mechanism (222); the outer telescopic arm (221) comprises a multi-layer guide sleeve structure.
13. A railway maintenance work device frame as claimed in claim 12, wherein: one end of the outer telescopic arm (221) is connected with the road maintenance machine body through a first outer rotating shaft (211), and the other end of the outer telescopic arm is connected with the outer operation unit mounting frame (32) through a second outer rotating shaft (213).
14. A railway maintenance work device frame as claimed in claim 5, wherein: the inner frame (114) includes an inner frame guide channel disposed at an edge of the inner frame (114) or uniformly disposed at four corners of the edge of the inner frame (114).
15. A railway maintenance work device frame as claimed in claim 9, wherein: the inner rotating frame (115) and the inner transverse moving guide post (121) are lapped in the guide groove of the inner fixing frame.
16. A railway maintenance working device frame as claimed in claim 6 or 8, wherein: the inner operation unit mounting frame (31) and the outer operation unit mounting frame (32) adopt a connectable structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920947193.XU CN211471990U (en) | 2019-06-21 | 2019-06-21 | Railway maintenance working device frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920947193.XU CN211471990U (en) | 2019-06-21 | 2019-06-21 | Railway maintenance working device frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211471990U true CN211471990U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920947193.XU Active CN211471990U (en) | 2019-06-21 | 2019-06-21 | Railway maintenance working device frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211471990U (en) |
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2019
- 2019-06-21 CN CN201920947193.XU patent/CN211471990U/en active Active
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