CN208417409U - A kind of Novel sound-silencing drag chain - Google Patents
A kind of Novel sound-silencing drag chain Download PDFInfo
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- CN208417409U CN208417409U CN201820902144.XU CN201820902144U CN208417409U CN 208417409 U CN208417409 U CN 208417409U CN 201820902144 U CN201820902144 U CN 201820902144U CN 208417409 U CN208417409 U CN 208417409U
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Abstract
The utility model discloses a kind of Novel sound-silencing drag chains, including two rows of mutually symmetrical with link sets, support connecting plate is installed between the chain link of two rows of link sets, in the two neighboring chain link of same row, second arc interconnecting piece of previous chain link mutually splices with the first arc interconnecting piece of the latter chain link, second limit convex body of previous chain link is inserted in the fan-shaped limiting groove of the latter chain link, first limit convex body of the latter chain link is inserted in the fan-shaped limit hole of previous chain link, first of the second flexible connector mounting groove and the latter chain link on second limit convex body of previous chain link limits and is connected with flexible connector between the first flexible connector mounting groove on convex body.Reasonable in design, the shaft that no setting is required of the utility model is provided with flexible connector and position limiting structure between chain link, so that the relative motion between chain link becomes flexible from rigidity, increases the cushion effect between each chain link, greatly reduces noise.
Description
Technical field
The utility model relates to drag chain technical fields, are to be related to a kind of Novel sound-silencing drag chain more specifically.
Background technique
In modern production, chain conveyer is a kind of common kind of drive, it is applied to each with irreplaceable advantage
Field.In numerically-controlled machine tool, various electronic equipments, stone machining equipment, glass machinery, manipulator, handling equipment, Automatic Warehouse
Etc., drag chain is widely used.The shape of drag chain is similar with the crawler belt of tank, tractor, and utilization is same
Principle, one transmission closed loop of formation all linked with one another between chain link.
In addition, drag chain can be also used for the laying of cable and oil, gas pipeline using drag chain the characteristics of continuously running.Paving
If when, pipeline is arranged inside drag chain, and with the movement of drag chain, pipeline can be sent to specified operating position, facilitate pipe
The laying work of line, especially in the place that a few thing personnel's inconvenience enters, the advantage of drag chain is become apparent.
Noise is bigger when the shortcomings that drag chain is work, and under specific occasion, noise can bring undesirable consequence, therefore,
The noise problem of drag chain needs to solve.
Utility model content
The purpose of the utility model is to overcome drawbacks described above in the prior art, provide a kind of Novel sound-silencing drag chain.
To achieve the above object, the utility model provides a kind of Novel sound-silencing drag chain, including two rows of mutually symmetrical with settings
Link set, every row chain section group respectively includes several chain links being successively flexibly connected, the chain link of first row link set and second
It arranges and is installed with two pieces of support connecting plates up and down, one end of each chain link of two rows of link sets between the respective link of link set respectively
Be equipped with the first arc interconnecting piece, be respectively equipped on the medial surface of the first arc interconnecting piece of each chain link the first limit convex body and
Fan-shaped limiting groove positioned at first limit convex body one end, the first limit convex body are installed equipped with the first flexible connector
Slot, the other end of each chain link of two rows of link sets are equipped with the second arc interconnecting piece, the second arc interconnecting piece of each chain link
Lateral surface on be respectively equipped with the second limit convex body and positioned at second limit convex body one end fan-shaped limit hole, it is described second limit
Convex body is equipped with the second flexible connector mounting groove, in the two neighboring chain link of same row, the second arc of previous chain link
First arc interconnecting piece of interconnecting piece and the latter chain link mutually splices, and is inserted in make the second of previous chain link to limit convex body
In the fan-shaped limiting groove of the latter chain link, the first limit convex body of the latter chain link is inserted in the fan-shaped limit of previous chain link
Kong Zhong, and between the second flexible connector mounting groove of previous chain link and the first flexible connector mounting groove of the latter chain link
It is connected with flexible connector.
As preferred embodiment, one end of each chain link of two rows of link sets is equipped with to be connected positioned at its first arc
Rotational trajectory insertion groove above portion, the other end of each chain link are equipped with the rotation rail above its second arc interconnecting piece
Mark limited block, the rotational trajectory limited block is arc-shaped, in the two neighboring chain link of same row, the rotation rail of previous chain link
Mark limited block is inserted into the rotational trajectory insertion groove with the latter chain link.
As preferred embodiment, two rows of link sets respectively further comprise a chain section header, and one end of the chain section header is in ring
Shape frame shaped, the other end of the chain section header are equipped with the second arc interconnecting piece, the second arc interconnecting piece of each chain section header it is outer
The second limit convex body and the fan-shaped limit hole positioned at second limit convex body one end, the second limit convex body are respectively equipped on side
It is equipped with the second flexible connector mounting groove, the of first chain link of the second arc interconnecting piece and same row of each chain section header
One arc interconnecting piece mutually splices, to make the second of chain section header to limit the fan-shaped limiting groove that convex body is inserted in first chain link
In, the first limit convex body of first chain link is inserted in the fan-shaped limit hole of chain section header, and the second elasticity of the chain section header
Flexible connector, two rows of link sets are connected between connector mounting groove and the first flexible connector mounting groove of first chain link
Chain section header between be installed with respectively up and down two pieces of support connecting plates.
As preferred embodiment, the other end of each chain section header is equipped with the rotation above the second arc interconnecting piece
Transition mark limited block, the rotational trajectory limited block is arc-shaped, and the rotational trajectory limited block of each chain section header is inserted respectively into together
In the rotational trajectory insertion groove of first chain link of one row.
As preferred embodiment, two rows of link sets respectively further comprise a chain link tail, and one end of the chain link tail is equipped with
First arc interconnecting piece, the other end of chain link tail frame shaped in a ring, the first arc interconnecting piece of each chain link tail it is interior
The first limit convex body and the fan-shaped limiting groove positioned at first limit convex body one end, first limit convex are respectively equipped on side
Body is equipped with the first flexible connector mounting groove, the first arc interconnecting piece of each chain link tail and the last one chain link of same row
The second arc interconnecting piece mutually splice, to make the first of chain link tail to limit the fan-shaped limit that convex body is inserted in the last one chain link
The second limit convex body of Kong Zhong, the last one chain link are inserted in the fan-shaped limiting groove of chain link tail, and the first bullet of chain link tail
Flexible connector, two row chains are connected between property connector mounting groove and the second flexible connector mounting groove of the last one chain link
Two pieces of support connecting plates up and down are installed between the chain link tail of section group respectively.
As preferred embodiment, one end of each chain link tail is equipped with the rotation above its first arc interconnecting piece
Transition mark insertion groove, the rotational trajectory that the rotational trajectory limited block of the last one chain link of same row is inserted respectively into chain link tail are inserted
Enter in slot.
As preferred embodiment, it is respectively provided on each chain link and chain link tail and is inserted into make for extracting tool
The tool insert hole of flexible connector abjection, the tool insert hole are located in the fan-shaped limiting groove on chain link and chain link tail simultaneously
One end corresponding to flexible connector.
As preferred embodiment, one end of the support connecting plate between the chain link of two rows of link sets, which is equipped with, to be buckled, and two
Arrange link set chain link between support connecting plate the other end be equipped with crotch, the top of each chain link of first row link set and
Bottom is respectively equipped with detent, and crotch card column is respectively equipped at the top and bottom of each chain link of the second link set, and every piece of support connects
One end of fishplate bar passes through respectively in the detent for the top and bottom of each chain link for being connected to first row link set, every piece of branch
The other end of support connecting plate links up with the crotch card in the top and bottom of each chain link of second row link set by crotch respectively
On column.
Compared with prior art, the utility model has the beneficial effects that:
Reasonable in design, the shaft that no setting is required of the utility model is provided with flexible connector and limit between chain link
Structure increases the cushion effect between each chain link, greatly reduces so that the relative motion between chain link becomes flexible from rigidity
Noise.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram of Novel sound-silencing drag chain provided by the utility model；
Fig. 2 is the structural schematic diagram of first row link set provided by the utility model；
Fig. 3 is the exploded view of two neighboring chain link provided by the utility model；
Fig. 4 is the structural schematic diagram of chain link provided by the utility model；
Fig. 5 is the structural schematic diagram of chain section header provided by the utility model；
Fig. 6 is the structural schematic diagram of chain link tail provided by the utility model；
Fig. 7 is the structural schematic diagram of support connecting plate provided by the utility model.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Referring to FIG. 1, the embodiments of the present invention provide a kind of Novel sound-silencing drag chain, including two rows of mutually symmetrical with set
The link set 1,2 set, first row link set 1 respectively include several chain links 11 being successively flexibly connected, and second row link set 2 is divided
Not Bao Kuo several chain links 21 for being successively flexibly connected, the chain link 11 of first row link set 1 chain corresponding to second row link set 2
Two pieces of support connecting plates 3 up and down are installed between section 21 respectively.
As shown in Figure 2, Figure 3 and Figure 4, one end of each chain link 11 of first row link set 1 is equipped with the connection of the first arc
Portion 111 is respectively equipped with the first limit convex body 112 on the medial surface of first arc interconnecting piece 111 of each chain link 11 and is located at the
The fan-shaped limiting groove 113 of one limit 112 one end of convex body, the first limit convex body 112 are equipped with the first flexible connector mounting groove
114, the other end of each chain link 11 of first row link set 1 is equipped with the second arc interconnecting piece 115, and the second of each chain link 11
The second limit convex body 116 and the sector positioned at second limit 116 one end of convex body are respectively equipped on the lateral surface of arc interconnecting piece 115
Limit hole 117, the second limit convex body 116 is equipped with the second flexible connector mounting groove 118, in the adjacent of first row link set 1
In two chain links 11, the first arc interconnecting piece 111 of the second arc interconnecting piece 115 and the latter chain link 11 of previous chain link 11
Mutually splice, to make the second of previous chain link 11 to limit the fan-shaped limiting groove 113 that convex body 116 is inserted in the latter chain link 11
In, the first limit convex body 112 of the latter chain link 11 is inserted in the fan-shaped limit hole 117 of previous chain link 11, and previous
Block between second flexible connector mounting groove 118 of chain link 11 and the first flexible connector mounting groove 114 of the latter chain link 11
It is connected to flexible connector 4 (plastic parts), the both ends of flexible connector 4 are arranged to cylinder header structure.
As shown in Figure 2, Figure 3 and Figure 4, one end of each chain link 11 of first row link set 1 is equipped with positioned at its first arc
The rotational trajectory insertion groove 119 of 111 top of shape interconnecting piece, the other end of each chain link 11 is equipped with to be connected positioned at its second arc
The rotational trajectory limited block 120 of 115 top of portion, rotational trajectory limited block 120 is arc-shaped, in the two neighboring chain link 11 of first row
In, the rotational trajectory limited block 120 of previous chain link 11 is inserted into the rotational trajectory insertion groove 119 with the latter chain link 11.
It should be noted that each of the structure of each chain link 21 of second row link set 2 and first row link set 1
The structure of chain link 11 is identical, and details are not described herein.
When it is implemented, the chain link 11 of first row link set 1 can connect into ring structure, second row link set 2 from beginning to end
Chain link 21 can connect into ring structure from beginning to end.Certainly, in another embodiment, the chain link 11 of first row link set 1 and
Strip structure also can be set in the chain link 21 of two row's link sets 2, at this point, as shown in Figure 1, first row link set 1 can also wrap
A chain section header 13 is included, second row link set 2 can also include a chain section header 23, the chain section header 13 of first row link set 1 and second
It arranges and is installed with two pieces of support connecting plates 3 up and down between the chain section header 23 of link set 2 respectively.
As shown in Figure 1, Figure 2 and shown in Fig. 5, one end of the chain section header 13 of first row link set 1 frame shaped in a ring, chain section header 13
The other end be equipped with the second arc interconnecting piece 131, the is respectively equipped on the lateral surface of the second arc interconnecting piece 131 of chain section header 13
Two limit convex bodys 132 and fan-shaped limit holes 133 positioned at second limit 132 one end of convex body, the second limit convex body 132 are equipped with the
Two flexible connector mounting grooves 134, the second arc interconnecting piece 131 and the first of first chain link 11 of same row of chain section header 13
111 phase of arc interconnecting piece splicing, to make the second of chain section header 13 to limit the fan-shaped limit that convex body 132 is inserted in first chain link 11
In the groove 113 of position, the first limit convex body 112 of first chain link 11 is inserted in the fan-shaped limit hole 133 of chain section header 13, and chain
Block between second flexible connector mounting groove 134 of section header 13 and the first flexible connector mounting groove 114 of first chain link 11
It is connected to flexible connector 4.
The other end of chain section header 13 is equipped with the rotational trajectory limited block 135 above the second arc interconnecting piece 131, rotation
Mark of going through transition limit 135 pieces it is arc-shaped, the rotational trajectory limited block 135 of chain section header 13 is inserted respectively into the of first row link set 1
In the rotational trajectory insertion groove 119 of one chain link 11.
It should be noted that the chain section header of the structure of the chain section header 23 of second row link set 2 and first row link set 1
13 structure is identical, the connection type between the chain section header 23 and chain link 21 of second row link set 2 also with first row link set 1
Connection type between chain section header 13 and chain link 11 is identical, and details are not described herein.
Correspondingly, second row link set 2 may be used also as shown in Figure 1, first row link set 1 can also include a chain link tail 14
To include a chain link tail 24, installed respectively between the chain link tail 14 of first row link set 1 and the chain link tail 24 of second row link set 2
There are two pieces of support connecting plates 3 up and down.
As shown in figs. 1,2 and 6, one end of the chain link tail 14 of first row link set 1 is equipped with the first arc interconnecting piece
141, the other end of chain link tail 14 frame shaped in a ring is set respectively on the medial surface of the first arc interconnecting piece 141 of chain link tail 14
There are the first limit convex body 142 and the fan-shaped limiting groove 143 positioned at first limit 142 one end of convex body, first limits on convex body 142
Equipped with the first flexible connector mounting groove 144, the last one chain link of the first arc interconnecting piece 141 and same row of chain link tail 14
11 115 phase of the second arc interconnecting piece splicing, so that making the first of chain link tail 14 to limit convex body 142 is inserted in the last one chain link
In 11 fan-shaped limit hole 117, the sector limit that the second limit convex body 116 of the last one chain link 11 is inserted in chain link tail 14 is recessed
In slot 143, and the second flexible connector of the first flexible connector mounting groove 144 and the last one chain link 11 of chain link tail 14 is pacified
Flexible connector 4 is connected between tankage 118.
One end of chain link tail 14 is equipped with the rotational trajectory insertion groove 145 above its first arc interconnecting piece 141, the
The rotational trajectory that the rotational trajectory limited block 120 of the last one chain link 11 of one row's link set 1 is inserted respectively into chain link tail 14 is inserted
Enter in slot 145.
It should be noted that the chain link tail of the structure of the chain link tail 24 of second row link set 2 and first row link set 1
24 structure is identical, the connection type between the chain link tail 24 and chain link 21 of second row link set 2 also with first row link set 1
Connection type between chain link tail 14 and chain link 11 is identical, and details are not described herein.
Preferably, being set respectively on each chain link 11,21 and chain link 14,24 for the ease of being dismantled to flexible connector 4
There is the tool insert hole 5 for being inserted into deviate from flexible connector for extracting tool (such as column, needle-shaped tool), tool is inserted
Enter in the fan-shaped limiting groove that hole 5 is located on chain link and chain link tail and correspond to one end of flexible connector 4.
As shown in fig. 7, between chain link 11 and chain link 21, between chain section header 13 and chain section header 23 and chain link tail 14 and chain link
One end of support connecting plate 3 between tail 24 is respectively equipped with buckle 31, and the other end of support connecting plate 3 is equipped with the court with buckle 31
To opposite crotch 32, the top and bottom of the chain link 11 of the first link set 11, chain section header 13 and chain link tail 14 are respectively equipped with card
The top and bottom of position 6, the chain link 21 of second row link set 2, chain section header 23 and chain link tail 24 are respectively equipped with crotch card column 7.It should
The both ends design of support connecting plate 3 can effectively prevent support connecting plate 3 to fall off in drag chain operational process.
When installation, one end of every piece of support connecting plate 3 passes through the chain link that buckle 31 is connected to first row link set 1 respectively
11, in the detent 6 of the top and bottom of chain section header 13 and chain link tail 14, the other end of every piece of support connecting plate 3 passes through curved respectively
Hook 32 is linked up in the chain link 21 of second row link set 2, the crotch card column 7 of the top and bottom of chain section header 23 and chain link tail 24.
When work, the setting of flexible connector so that between chain link and chain link, chain section header and chain link and chain link tail with
Relative motion between chain link becomes flexible from rigidity, and elastic shape can occur under the limitation of position limiting structure for flexible connector
Become, overcomes mutation stress, increase the cushion effect between each joint, greatly reduce noise.In addition, rotational trajectory limited block
It can slide, limit between chain link and chain link, between chain section header and chain link and chain in corresponding rotational trajectory insertion groove
Save the rotational trajectory between tail and chain link.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (8)
1. a kind of Novel sound-silencing drag chain, the link set including two rows of mutually symmetrical with settings, every row chain section group respectively include several
The chain link being successively flexibly connected is installed with respectively between the chain link of first row link set and the respective link of second row link set
Lower two pieces of supports connecting plate, it is characterised in that: one end of each chain link of two rows of link sets is equipped with the first arc interconnecting piece, often
The first limit convex body is respectively equipped on the medial surface of first arc interconnecting piece of a chain link and positioned at first limit convex body one end
Fan-shaped limiting groove, the first limit convex body are equipped with the first flexible connector mounting groove, each chain link of two rows of link sets
The other end be equipped with the second arc interconnecting piece, be respectively equipped with the second limit on the lateral surface of the second arc interconnecting piece of each chain link
Position convex body and the fan-shaped limit hole for limiting convex body one end positioned at second, the second limit convex body are equipped with the second flexible connector
Mounting groove, in the two neighboring chain link of same row, the second arc interconnecting piece of previous chain link and the first of the latter chain link
Arc interconnecting piece mutually splices, to make the second of previous chain link to limit the fan-shaped limiting groove that convex body is inserted in the latter chain link
In, the first limit convex body of the latter chain link is inserted in the fan-shaped limit hole of previous chain link, and the second of previous chain link
Flexible connector is connected between flexible connector mounting groove and the first flexible connector mounting groove of the latter chain link.
2. a kind of Novel sound-silencing drag chain according to claim 1, it is characterised in that: the one of each chain link of two rows of link sets
End is equipped with the rotational trajectory insertion groove above its first arc interconnecting piece, and the other end of each chain link is equipped with positioned at it
Rotational trajectory limited block above second arc interconnecting piece, the rotational trajectory limited block is arc-shaped, adjacent the two of same row
In a chain link, the rotational trajectory limited block of previous chain link is inserted into the rotational trajectory insertion groove with the latter chain link.
3. a kind of Novel sound-silencing drag chain according to claim 1, it is characterised in that: two rows of link sets respectively further comprise a chain
Section header, frame shaped, the other end of the chain section header are equipped with the second arc interconnecting piece, Mei Gelian in a ring for one end of the chain section header
The second limit convex body and the fan positioned at second limit convex body one end are respectively equipped on the lateral surface of second arc interconnecting piece of section header
Shape limit hole, the second limit convex body are equipped with the second flexible connector mounting groove, and the second arc of each chain section header connects
Portion and the first arc interconnecting piece of first chain link of same row mutually splice, and are inserted in make the second of chain section header to limit convex body
In the fan-shaped limiting groove of first chain link, the first limit convex body of first chain link is inserted in the fan-shaped limit hole of chain section header
In, and block between the second flexible connector mounting groove of the chain section header and the first flexible connector mounting groove of first chain link
It is connected to flexible connector, is installed with two pieces of support connecting plates up and down between the chain section header of two rows of link sets respectively.
4. a kind of Novel sound-silencing drag chain according to claim 3, it is characterised in that: the other end of each chain section header is equipped with
Rotational trajectory limited block above the second arc interconnecting piece, the rotational trajectory limited block is arc-shaped, each chain section header
Rotational trajectory limited block is inserted respectively into the rotational trajectory insertion groove of first chain link of same row.
5. a kind of Novel sound-silencing drag chain according to claim 1, it is characterised in that: two rows of link sets respectively further comprise a chain
Save tail, one end of the chain link tail is equipped with the first arc interconnecting piece, the other end of chain link tail frame shaped in a ring, Mei Gelian
It saves and is respectively equipped with the first limit convex body and the fan positioned at first limit convex body one end on the medial surface of the first arc interconnecting piece of tail
Shape limiting groove, the first limit convex body are equipped with the first flexible connector mounting groove, and the first arc of each chain link tail connects
Socket part and the second arc interconnecting piece of the last one chain link of same row mutually splice, and insert to make the first of chain link tail to limit convex body
It is placed in the fan-shaped limit hole of the last one chain link, the second limit convex body of the last one chain link is inserted in the fan-shaped limit of chain link tail
In the groove of position, and the second flexible connector mounting groove of the first flexible connector mounting groove of chain link tail and the last one chain link it
Between be connected with flexible connector, be installed with respectively between the chain link tail of two rows of link sets up and down two pieces of support connecting plates.
6. a kind of Novel sound-silencing drag chain according to claim 5, it is characterised in that: one end of each chain link tail is equipped with position
Rotational trajectory insertion groove above its first arc interconnecting piece, the rotational trajectory limited block point of the last one chain link of same row
It is not inserted into the rotational trajectory insertion groove of chain link tail.
7. a kind of Novel sound-silencing drag chain according to claim 5, it is characterised in that: set respectively on each chain link and chain link tail
Have for for extracting tool be inserted into make flexible connector deviate from tool insert hole, the tool insert hole be located at chain link with
One end in fan-shaped limiting groove on chain link tail and corresponding to flexible connector.
8. a kind of Novel sound-silencing drag chain according to claim 1, it is characterised in that: the branch between the chain link of two rows of link sets
The one end for supportting connecting plate is equipped with buckle, and the other end of the support connecting plate between the chain link of two rows of link sets is equipped with crotch, and first
It arranges and is respectively equipped with detent at the top and bottom of each chain link of link set, the top and bottom point of each chain link of the second link set
Not She You crotch card column, every piece support connecting plate one end pass through each chain link for being connected to first row link set respectively
In the detent of top and bottom, the other end of every piece of support connecting plate is linked up with by crotch in each of second row link set respectively
In the crotch card column of the top and bottom of chain link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820902144.XU CN208417409U (en) | 2018-06-11 | 2018-06-11 | A kind of Novel sound-silencing drag chain |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820902144.XU CN208417409U (en) | 2018-06-11 | 2018-06-11 | A kind of Novel sound-silencing drag chain |
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| Publication Number | Publication Date |
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| CN208417409U true CN208417409U (en) | 2019-01-22 |
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| CN201820902144.XU Active CN208417409U (en) | 2018-06-11 | 2018-06-11 | A kind of Novel sound-silencing drag chain |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116025668A (en) * | 2023-03-15 | 2023-04-28 | 东莞市丰收实业有限公司 | Mute drag chain with coupling structure realized in abutting mode |
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2018
- 2018-06-11 CN CN201820902144.XU patent/CN208417409U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116025668A (en) * | 2023-03-15 | 2023-04-28 | 东莞市丰收实业有限公司 | Mute drag chain with coupling structure realized in abutting mode |
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