CN209008519U - A kind of electrostatic boots and vehicle - Google Patents
A kind of electrostatic boots and vehicle Download PDFInfo
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- CN209008519U CN209008519U CN201821558394.2U CN201821558394U CN209008519U CN 209008519 U CN209008519 U CN 209008519U CN 201821558394 U CN201821558394 U CN 201821558394U CN 209008519 U CN209008519 U CN 209008519U
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- electrostatic
- swing arm
- boots
- rail
- head
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Abstract
The utility model proposes a kind of electrostatic boots and vehicles, electrostatic boots are made of support assembly, swing arm, electrostatic head, conduct piece, elastic component and dedusting assembly, wherein support assembly is suitable for being connected with car body, one end of swing arm and support assembly pivotable connection, electrostatic head is connected with the other end of swing arm, and electrostatic head is suitable for contacting with electrostatic rail；One end of conduct piece is electrically connected with electrostatic head, and the other end of conduct piece is suitable for being electrically connected with car body, and the junction of swing arm and support assembly is arranged in elastic component, and elastic component acts on swing arm；Dedusting assembly is connected with support assembly, and positioned at the front of electrostatic head, and dedusting assembly is suitable for being in contact with electrostatic rail.By the way that dedusting assembly is arranged, when electrostatic boots work on electrostatic rail, can in real time on electrostatic rail sand and dust and foreign matter clear up, so as to avoid sand and dust and foreign matter electrostatic boots are caused with the generation of wear phenomenon, the service life of electrostatic boots is extended, while improving the work quality of electrostatic boots and vehicle.
Description
Technical field
The utility model relates to field of track traffic more particularly to a kind of electrostatic boots and vehicle.
Background technique
In the related technology, one end of electrostatic boots is electrically connected with car body, and the other end is in contact, it can be achieved that by car body with electrostatic rail
Electricity by electrostatic rail import the earth, avoid part traction current and flow through car body and bearing housing, make bearing abnormal heating, occur
The defects of couple corrosion, accelerated wear test, to protect car body and bearing housing.However, electrostatic boots in the prior art with it is quiet
During electric rail contact, there are sand and dust or other foreign matters for meeting on electrostatic rail, if handling not in time, will cause to grind to electrostatic boots
Damage, substantially reduces the service life of electrostatic boots.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
A kind of electrostatic boots are gone out, dedusting assembly have been provided on electrostatic boots, the dedusting assembly is suitable for being in contact with electrostatic rail, and is arranged
The front of electrostatic head, when electrostatic boots work on electrostatic rail, dedusting assembly can in real time on electrostatic rail sand and dust and foreign matter into
Electrostatic boots are caused the generation of wear phenomenon so as to avoid sand and dust and foreign matter, extend the service life of electrostatic boots by row cleaning,
The work quality of electrostatic boots is improved simultaneously.
According to the electrostatic boots of the utility model embodiment, suitable for contacting with electrostatic rail, the electrostatic boots include: that support is total
At the support assembly is suitable for being connected with car body；Swing arm, one end of the swing arm and the support assembly pivotable connection；It is quiet
Dateline, the electrostatic head are connected with the other end of the swing arm, and the electrostatic head is suitable for contacting with electrostatic rail；Conduct piece, institute
The one end for stating conduct piece is electrically connected with the electrostatic head, and the other end of the conduct piece is suitable for being electrically connected with car body；Elastic component, institute
The junction that the swing arm and the support assembly is arranged in elastic component is stated, and the elastic component acts on the swing arm, so that
The electrostatic head is contacted with the electrostatic rail；Dedusting assembly, the dedusting assembly are connected with the support assembly, are located at described quiet
The front of dateline, and the dedusting assembly is suitable for contacting with the electrostatic rail.
In some embodiments, the support assembly includes pedestal and locating shaft, and the locating shaft is arranged in the pedestal
On, the pedestal is suitable for connecting with car body, and one end far from the pedestal of one end of the swing arm and the locating shaft can pivot
Turn connection, the other end of the swing arm and the electrostatic head pivotable connection.
In some embodiments, the elastic component is set in one end far from the pedestal of the locating shaft, and acts on
In the swing arm, so that the electrostatic head is contacted with electrostatic rail.
In some embodiments, the dedusting assembly includes mounting rack and dust removal piece, and the mounting rack is fixed on described fixed
On the axis of position, the front on the mounting rack and being located at the electrostatic head is arranged in the dust removal piece, and the dust removal piece is suitable for and institute
State the contact of electrostatic rail.
In some embodiments, the mounting rack includes the first mounting portion, interconnecting piece and the second mounting portion, first peace
Dress portion is fastenedly connected with the locating shaft, and first mounting portion extends downwardly out the interconnecting piece, and the interconnecting piece is to the right
Extend the second mounting portion, the dust removal piece is arranged on the second mounting portion.
In some embodiments, the locating shaft, the elastic component and the swing arm are multiple and correspond respectively.
In some embodiments, the electrostatic head include carbon slipper and be insulated seat, the insulating mounting seat with it is described
The other end pivotable connection of swing arm, the carbon slipper are mounted on the insulating mounting seat, and the carbon slipper is suitable for and institute
State the contact of electrostatic rail.
In some embodiments, the elastic component is torsional spring.
In some embodiments, the dust removal piece is flexible material, and the dust removal piece is dust removal brush or roller.
The utility model also proposed a kind of vehicle, including foregoing electrostatic boots.It is foregoing quiet by being arranged
Trolley, it can be achieved that on electrostatic rail sand and dust and foreign matter clean, avoid sand and dust and foreign matter and electrostatic boots on vehicle caused
The generation of wear phenomenon, extends the service life of electrostatic boots, while improving the work quality of vehicle.
The beneficial effect of technical solution provided by the utility model is: the electrostatic boots in compared with the prior art, this is practical
The electrostatic boots and vehicle of novel offer are provided with dedusting assembly on electrostatic boots, and the dedusting assembly is suitable for being in contact with electrostatic rail,
And the front of electrostatic head is set, when electrostatic boots work on electrostatic rail, dedusting assembly can be in real time to the sand and dust on electrostatic rail
It is cleared up with foreign matter, so as to avoid sand and dust and foreign matter electrostatic boots is caused with the generation of wear phenomenon, extends electrostatic boots
Service life, while improving the work quality of electrostatic boots and vehicle.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the electrostatic boots of the utility model embodiment；
Fig. 2 is the structural schematic diagram according to the mounting rack of the utility model embodiment；
Appended drawing reference:
Electrostatic boots 100；
Support assembly 1；Swing arm 2；Electrostatic head 3；Conduct piece 4；Elastic component 5；Dedusting assembly 6；
Pedestal 11；Locating shaft 12；Protruding end 111, carbon slipper 31；It is insulated seat 32；
Mounting rack 61；Dust removal piece 62；First mounting portion 611；Interconnecting piece 612；Second mounting portion 613.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right"
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.In the utility model, it should be noted that, term " is set
Set ", " connection ", " connected " should broadly understood, specific set-up mode and connection type can be set as the case may be,
It is not particularly limited, for the ordinary skill in the art, it can be understood as the case may be in the utility model
In concrete meaning.
Illustrate the electrostatic boots 100 of the utility model embodiment below with reference to Fig. 1-Fig. 2, is provided with dedusting on electrostatic boots 100
Assembly 6, the dedusting assembly 6 is suitable for being in contact with electrostatic boots 100, and the front of electrostatic head 3 is arranged in, when electrostatic boots 100 exist
When working on electrostatic rail, dedusting assembly 6 can in real time on electrostatic rail sand and dust and foreign matter clear up, so as to avoid sand and dust and
Foreign matter causes the generation of wear phenomenon to electrostatic boots 100, extends the service life of electrostatic boots 100, while improving electrostatic boots
Work quality.
As shown in Figure 1, according to the electrostatic boots 100 of the utility model embodiment, suitable for being contacted with electrostatic rail, electrostatic boots 100
It is made of support assembly 1, swing arm 2, electrostatic head 3, conduct piece 4, elastic component 5 and dedusting assembly 6, support assembly 1 is suitable for and car body
It is connected, wherein one end of swing arm 2 and 1 pivotable connection of support assembly, electrostatic head 3 is connected with the other end of swing arm 2, and electrostatic
First 3 are suitable for contacting with electrostatic rail；One end of conduct piece 4 is electrically connected with electrostatic head 3, and the other end of conduct piece 4 is suitable for and car body electricity
Connection；The junction of swing arm 2 and support assembly 1 is arranged in elastic component 5, and elastic component 5 acts on swing arm 2 so that electrostatic head 3 with
The contact of electrostatic rail；Dedusting assembly 6 is connected with support assembly 1, and positioned at the front of electrostatic head 3, and dedusting assembly 6 is suitable for and electrostatic rail
It is in contact.For example, as shown in Figure 1, electrostatic boots 100 are by support assembly 1, swing arm 2, electrostatic head 3, conduct piece 4, elastic component 5 and remove
Dirt assembly 6 forms, wherein support assembly 1 is suitable for being connected with car body, one end of swing arm 2 and 1 pivotable connection of support assembly, pendulum
The other end and 3 pivotable connection of electrostatic head of arm 2, and electrostatic head 3 is suitable for contacting with electrostatic rail, specifically, when electrostatic boots 100 exist
When working on electrostatic rail, by the pivotable swing of swing arm 2, controllable electrostatic boots 100 and the contact of electrostatic rail with separate, more
Specifically, when electrostatic boots 100 need work, by swinging swing arm 2, control electrostatic head 3 is contacted with electrostatic rail, so that electrostatic boots
100 work normally, and when electrostatic boots 100 need to stop working, by swinging swing arm 2, control electrostatic head 3 is detached from electrostatic rail and is
It can；One end of conduct piece 4 is electrically connected with electrostatic head 3, and the other end of conduct piece 4 is suitable for being electrically connected with car body, in this way, can be real
The electricity of car body is now imported into the earth by electrostatic rail, part traction current is avoided by car body and bearing housing, keeps bearing abnormal
The defects of couple corrosion, accelerated wear test, occurs for fever, to protect car body and bearing housing；Elastic component 5 is arranged in 2 He of swing arm
The junction of support assembly 1, and elastic component 5 acts on swing arm 2 so that electrostatic head 3 is contacted with electrostatic rail, in this way setting so that,
When electrostatic boots 100 work on electrostatic rail, elastic component 5 is applied to 2 one lasting pressure of swing arm, and swing arm 2 is made to have rotation
The pressing force of trend, and then to 3 one downward pressing forces of electrostatic head in swing arm 2, connect 3 moment of electrostatic head with electrostatic rail
Touching eliminates vehicle electrostatic so that the conductance on car body is entered electrostatic rail；Dedusting assembly 6 is connected with support assembly 1, is located at electrostatic
First 3 front, and dedusting assembly 6 is suitable for being in contact with electrostatic rail, wherein " positioned at the front of electrostatic head 3 " can be regarded as dedusting
Assembly 6 is located at before 3 walking path of electrostatic head, it can be achieved that first by 6 dedusting of dedusting assembly, and then electrostatic head 3, which is reruned, passes through,
Specifically, when electrostatic boots 100 are walked on electrostatic rail, dedusting assembly 6 and the walking path having the same of electrostatic head 3, and remove
Dirt assembly 6 is located at before 3 walking path of electrostatic head, wherein dedusting assembly 6 is remained to be contacted with electrostatic rail, is cleared away in real time
Sand and dust and foreign matter on electrostatic rail cause the generation of wear phenomenon to electrostatic boots 100 so as to avoid sand and dust and foreign matter, extend
The service life of electrostatic boots 100, while improving the work quality of electrostatic boots.It should be noted that dedusting assembly can be machine
Tool formula, be also possible to it is DYN dynamic, for example, actuator can be arranged on dedusting assembly to have the function that electrical dust-removing.
According to the electrostatic boots 100 of the utility model embodiment, by being provided with dedusting assembly 6, dedusting on electrostatic boots 100
Assembly 6 is suitable for being in contact with electrostatic rail, and the front of electrostatic head 3 is arranged in, and when electrostatic boots 100 work on electrostatic rail, removes
Dirt assembly 6 can in real time on electrostatic rail sand and dust and foreign matter clear up, electrostatic boots 100 are made so as to avoid sand and dust and foreign matter
At the generation of wear phenomenon, the service life of electrostatic boots 100 is extended, while improving the work quality of electrostatic boots.
In some embodiments, as shown in Figure 1, support assembly 1 includes pedestal 11 and locating shaft 12, the setting of locating shaft 12 exists
On pedestal 11, pedestal 11 is suitable for connecting with car body, and one end of the separate pedestal 11 of one end and locating shaft 12 of swing arm 2 pivotably connects
It connects, the other end and 3 pivotable connection of electrostatic head of swing arm 2.Specifically, as shown in Figure 1, being extended on pedestal 11 has protruding end
111, one end (such as left end of locating shaft 12 shown in Fig. 1) of the close pedestal 11 of locating shaft 12 is fixed at protrusion
On end 111, and one end (such as right side of locating shaft 12 shown in Fig. 1 of the separate pedestal of one end of swing arm 2 and locating shaft 12
End) pivotable connection, the other end and 3 pivotable connection of electrostatic head of swing arm 2.It here is electrostatic head 3 by setting locating shaft 12
Space layout provide space；By swing arm 2 and 3 pivotable connection of electrostatic head, enhances electrostatic head 3 and contacted with electrostatic rail
Swing buffering effect in journey plays the role of further protecting to electrostatic head.
In some embodiments, as shown in Figure 1, elastic component 5 be set in the separate pedestal 11 of locating shaft 12 one end (such as
The right end of locating shaft 12 shown in Fig. 1), and swing arm 2 is acted on, so that electrostatic head 3 is contacted with electrostatic rail.Elastic component 5
Setting so that, when electrostatic boots 100 work on electrostatic rail, elastic component 5 is applied to 2 one lasting pressure of swing arm, makes swing arm 2
Pressing force with rotation trend, and then to 3 one downward pressing forces of electrostatic head in swing arm 2, to make 3 moment of electrostatic head
It is contacted with electrostatic rail, so that the conductance on car body is entered electrostatic rail, eliminates vehicle electrostatic.
In some embodiments, as shown in Figure 1, dedusting assembly 6 is made of mounting rack 61 and dust removal piece 62, mounting rack 61 is solid
It is scheduled on locating shaft 12, dust removal piece 62 is arranged on mounting rack 61, wherein dust removal piece 62 is located at the front of electrostatic head 3, and dedusting
Part 62 is suitable for contacting with electrostatic rail.Specifically, when electrostatic boots 100 are walked on electrostatic rail, dust removal piece 62 and electrostatic head 3 have
Identical walking path, and dust removal piece 62 is remained and is contacted with electrostatic rail, clears away sand and dust and foreign matter on electrostatic rail in real time, from
And the generation that sand and dust and foreign matter cause wear phenomenon to electrostatic boots 100 is avoided, the service life of electrostatic boots 100 is extended, together
When improve the work qualities of electrostatic boots.
In some embodiments, as depicted in figs. 1 and 2, mounting rack 61 includes the first mounting portion 611,612 and of interconnecting piece
Second mounting portion 613, the first mounting portion 611 are fastenedly connected with locating shaft 12, and the first mounting portion 611 extends downwardly out interconnecting piece
612, interconnecting piece 612 extends to the right the second mounting portion 613, and dust removal piece 62 is arranged on the second mounting portion 613.In this way,
The installation site of dust removal piece 62 can effectively be extended, to guarantee that dust removal piece 62 is located at the front of electrostatic head 3, and guarantee to work as electrostatic
For boots 100 when walking on electrostatic rail, dust removal piece 62 can keep identical walking path with electrostatic head 3.
In some embodiments, as shown in Figure 1, locating shaft 12, elastic component 5 and swing arm 2 are multiple and difference one is a pair of
It answers.For example, as shown in Figure 1, the quantity of locating shaft 12, elastic component 5 and swing arm 2 is 2, it is ensured that swing arm 2 is applied to electrostatic
First 3 power is more uniform, and guarantees that electrostatic head 3 and the contact of electrostatic rail are more steady.Optionally, locating shaft 12,5 and of elastic component
The quantity of swing arm 2 may also be configured to 3 or more.
In some embodiments, as shown in Figure 1, electrostatic head 3 includes carbon slipper 31 and is insulated seat 32, it is insulated seat
32 with the other end pivotable connection of swing arm 2, carbon slipper 31, which is mounted on, to be insulated on seat 32, and carbon slipper 31 is suitable for and electrostatic
Rail contact.Here seat is insulated by setting, avoids car body electrostatic by support assembly 1 and swing arm 2 and imported into carbon slipper
31, support assembly 1 and swing arm 2 are avoided by couple corrosion, to extend 2 service life of support assembly 1 and swing arm, favorably
In reduction use cost.
In some embodiments, as shown in Figure 1, elastic component 5 is torsional spring.Wherein, torsional spring has preferable twisting resistance, can be
Swing arm 2 provides stable swing pressing force, and cost is relatively low.
In some embodiments, as shown in Figure 1, dust removal piece 62 is flexible material, flexible material has preferable pliability
And flexibility can play the role of good cleaning with electrostatic rail contact process.Optionally, dust removal piece 62 can be selected and be removed
Dirt brush can also select roller；When dust removal piece 62 selects dust removal brush, the lower part of dust removal brush can be made inclined surface, work as dedusting
Can make when brushing inswept electrostatic rail sand and dust on rail level on the inside of electrostatic rail or outside one direction is cleared up, avoid sand and dust or
Foreign matter is fallen on other running equipments or product.
According to the vehicle of the utility model embodiment, electrostatic boots 100 are provided on vehicle.The support assembly 1 of electrostatic boots 100
It is arranged on the car body of vehicle, and the conduct piece 4 of electrostatic boots 100 is electrically connected with car body, electrostatic head 3 is suitable for contacting with electrostatic rail,
In vehicle normal course of operation, electrostatic boots 100 are walked on electrostatic rail, can in real time on electrostatic rail sand and dust and foreign matter carry out
Electrostatic boots are caused the generation of wear phenomenon so as to avoid sand and dust and foreign matter, extend the use of electrostatic boots on vehicle by cleaning
Service life, while improving the work quality of vehicle.
According to the electrostatic boots and vehicle of the utility model embodiment, when electrostatic boots work on electrostatic rail, dedusting assembly
Can in real time on electrostatic rail sand and dust and foreign matter clear up, wear phenomenon is caused to electrostatic boots so as to avoid sand and dust and foreign matter
Generation, extend the service life of electrostatic boots, while improving the work quality of electrostatic boots and vehicle.
Skill common for this field is constituted and operated according to other of the electrostatic boots of the utility model embodiment and vehicle
All be for art personnel it is known, be not detailed herein.
In the description of this specification, the description of reference term " embodiment ", " some embodiments " etc. means to combine the reality
Apply example or example particular features, structures, materials, or characteristics described be contained in the utility model at least one embodiment or
In example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.And
And particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples with suitable
Mode combine.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (10)
1. a kind of electrostatic boots, suitable for being contacted with electrostatic rail, which is characterized in that the electrostatic boots include:
Support assembly, the support assembly are suitable for being connected with car body；
Swing arm, one end of the swing arm and the support assembly pivotable connection；
Electrostatic head, the electrostatic head are connected with the other end of the swing arm, and the electrostatic head is suitable for contacting with the electrostatic rail；
Conduct piece, one end of the conduct piece are electrically connected with the electrostatic head, and the other end of the conduct piece is suitable for and car body electricity
Connection；
Elastic component, the junction of the swing arm and the support assembly is arranged in the elastic component, and the elastic component acts on
The swing arm, so that the electrostatic head is contacted with the electrostatic rail；
Dedusting assembly, the dedusting assembly are connected with the support assembly, and positioned at the front of the electrostatic head, and the dedusting is total
At suitable for being contacted with the electrostatic rail.
2. electrostatic boots according to claim 1, which is characterized in that the support assembly includes pedestal and locating shaft, described
Locating shaft is arranged on the base, and the pedestal is suitable for connecting with car body, and one end of the swing arm is remote with the locating shaft
One end pivotable connection from the pedestal, the other end of the swing arm and the electrostatic head pivotable connection.
3. electrostatic boots according to claim 2, which is characterized in that the elastic component is set in the separate institute of the locating shaft
One end of pedestal is stated, and acts on the swing arm, so that the electrostatic head is contacted with the electrostatic rail.
4. electrostatic boots according to claim 3, which is characterized in that the dedusting assembly includes mounting rack and dust removal piece, institute
It states mounting rack to be fixed on the locating shaft, before the dust removal piece is arranged on the mounting rack and is located at the electrostatic head
Side, the dust removal piece are suitable for contacting with the electrostatic rail.
5. electrostatic boots according to claim 4, which is characterized in that the mounting rack include the first mounting portion, interconnecting piece and
Second mounting portion, first mounting portion are fastenedly connected with the locating shaft, and first mounting portion extend downwardly out it is described
Interconnecting piece, the interconnecting piece extend to the right the second mounting portion, and the dust removal piece is arranged on the second mounting portion.
6. electrostatic boots according to claim 3, which is characterized in that the locating shaft, the elastic component and the swing arm are equal
It is multiple and correspond respectively.
7. electrostatic boots according to claim 1, which is characterized in that the electrostatic head include carbon slipper and be insulated seat,
The other end pivotable connection for being insulated seat and the swing arm, the carbon slipper are mounted on the insulating mounting seat,
And the carbon slipper is suitable for contacting with the electrostatic rail.
8. electrostatic boots according to claim 1, which is characterized in that the elastic component is torsional spring.
9. electrostatic boots according to claim 4, which is characterized in that the dust removal piece is flexible material, and the dust removal piece
For dust removal brush or roller.
10. a kind of vehicle, which is characterized in that including the described in any item electrostatic boots of such as claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821558394.2U CN209008519U (en) | 2018-09-25 | 2018-09-25 | A kind of electrostatic boots and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821558394.2U CN209008519U (en) | 2018-09-25 | 2018-09-25 | A kind of electrostatic boots and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209008519U true CN209008519U (en) | 2019-06-21 |
Family
ID=66833936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821558394.2U Active CN209008519U (en) | 2018-09-25 | 2018-09-25 | A kind of electrostatic boots and vehicle |
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| Country | Link |
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| CN (1) | CN209008519U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115835464A (en) * | 2023-02-23 | 2023-03-21 | 成都思越智能装备股份有限公司 | Anti-static structure of trolley |
-
2018
- 2018-09-25 CN CN201821558394.2U patent/CN209008519U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115835464A (en) * | 2023-02-23 | 2023-03-21 | 成都思越智能装备股份有限公司 | Anti-static structure of trolley |
| CN115835464B (en) * | 2023-02-23 | 2023-05-02 | 成都思越智能装备股份有限公司 | Antistatic structure of trolley |
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