CN209875859U - Chain and chain wrench - Google Patents
Chain and chain wrench Download PDFInfo
- Publication number
- CN209875859U CN209875859U CN201920662739.7U CN201920662739U CN209875859U CN 209875859 U CN209875859 U CN 209875859U CN 201920662739 U CN201920662739 U CN 201920662739U CN 209875859 U CN209875859 U CN 209875859U
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- China
- Prior art keywords
- chain
- link
- ejector rod
- handle
- wrench
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- 230000000149 penetrating effect Effects 0.000 claims 1
- 210000000080 chela (arthropods) Anatomy 0.000 abstract description 12
- 240000005002 Erythronium dens canis Species 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model discloses a chain, including a plurality of articulated chain links of round pin axle that loop through, its characterized in that: the chain link includes an at least link joint, the interlude of link joint is narrowed, and articulated portion is formed at the both ends of link joint, the center of articulated portion sets up the shaft hole, through passing between the link joint of two adjacent link joints the round pin axle in shaft hole links to each other, the edge of articulated portion is arc, and the edge of two offsides of every articulated portion all is provided with curved dogtooth, and this chain can increase the frictional force between chain and the work piece, improves the moment of torsion that the spanner was applyed to the work piece, simultaneously the utility model also provides a chain spanner, including chain, pincers handle and tensioning assembly, the elasticity between chain and the work piece is adjusted to this chain spanner accessible tensioning assembly.
Description
Technical Field
The utility model relates to a hardware and tools technical field, concretely relates to chain and chain spanner.
Background
Chain spanner, also called chain tong, it contains pincers handle and one side and pincers handle articulated chain, the opposite side of pincers handle be equipped with the trip of chain block, the centre gripping of chain spanner to the work piece, the rotation is realized by the frictional force between chain and the work piece, frictional force is big more, the moment of torsion that the spanner was applyed the work piece just also big more.
The chain spanner can be different according to the diameter of work piece, contract or emit the chain link of chain at will, make chain and work piece in close contact with, however, the edge of the link joint of current chain is level and smooth, coefficient of friction between chain and the work piece is less, lead to the frictional force between chain and the work piece less, take place relative slip during the rotation between chain and the work piece easily, the moment of torsion that the spanner can be applyed to the work piece is less, and, when the cover chain, overlap the chain on the work piece and will take up with power, then with the chain link card that corresponds on the chain on the trip of pincers handle, not only so the operation is more laborious, but also the elasticity of chain is still not well controlled, the unable in close contact with of work piece or the condition that the chain clamp caused the damage to the surface of work piece can appear.
SUMMERY OF THE UTILITY MODEL
To defect among the prior art, the utility model provides a chain to increase the frictional force between chain and the work piece, improve the moment of torsion that the spanner was applyed to the work piece, still provide a chain spanner simultaneously, so that adjust the elasticity between chain and the work piece.
In one aspect, the utility model provides a chain, including a plurality of articulated chain links of round pin axle that loop through, the chain link includes an at least link joint, the interlude of link joint narrows down, and articulated portion is formed at the both ends of link joint, the center of articulated portion sets up the shaft hole, through passing between the link joint of two adjacent chain links the round pin axle in shaft hole links to each other, the edge of articulated portion is arc, and the edge of two offsides of every articulated portion all is provided with curved dogtooth.
Further, in two adjacent chain links, one of the chain links has two link plates, the other chain link has one link plate, the two link plates of one chain link are clamped on two sides of one link plate of the other chain link, shaft holes at one ends of the three link plates are aligned, and the pin shaft sequentially penetrates through the three aligned shaft holes.
Furthermore, two ends of the pin shaft extend out of the chain plates at two sides for a certain distance.
On the other hand, the utility model provides a chain wrench, including chain, pincers handle and tensioning assembly, the front end of pincers handle is provided with the binding clip, the one end of chain with one side of binding clip is articulated, and the opposite side of binding clip is provided with the trip that is used for with the chain link joint of chain, the tensioning assembly includes kicking block and screw ejector pin, the front end of binding clip open along the axial be equipped with the spout of kicking block adaptation, kicking block slidable mounting be in the spout, screw ejector pin along the axial run through the preceding, back both ends of pincers handle and with pincers handle screw-thread fit, screw ejector pin's front end meets with the kicking block to drive the kicking block back-and-forth movement through screw ejector pin, screw ejector pin's rear end exposes the rear end of pincers handle.
Furthermore, the front end of the threaded ejector rod is abutted to the ejector block, the threaded ejector rod is sleeved with a tension spring, the front end of the tension spring is connected with the ejector block, and the rear end of the tension spring is connected with the clamp handle.
Furthermore, the front end of the clamp handle is provided with a yielding hole communicated with the bottom of the sliding groove, the threaded ejector rod penetrates through the yielding hole, and the tension spring is arranged in the yielding hole.
Further, the front end face of the top block is provided with a convex pattern.
Furthermore, the rear end of the threaded ejector rod is provided with a butterfly-shaped screwing handle.
The beneficial effects of the utility model are embodied in:
(1) the interlude of this link joint narrows down, when the chain presss from both sides on the work piece, the side and the work piece contact of the articulated portion at each link joint both ends, because the edge of the two offsides of the articulated portion of link joint of this application is provided with curved dogtooth, the dogtooth can increase the frictional force of contact between link joint and the work piece to increased the frictional force between chain and the work piece, improved the moment of torsion that the spanner was applyed to the work piece, because the dogtooth is the arc, also less to the damage of work piece.
(2) This chain spanner is equipped with the tensioning subassembly, during the use, in the spout is arranged in to the kicking block, support the binding clip on treating rotatory work piece, the expansion end of chain is walked around the work piece and is blocked the chain link that corresponds on the chain on the clamping hook of pincers handle, make the chain paste tightly basically with the work piece, then twist the screw thread ejector pin, it is ejecting along the spout with the kicking block through the screw thread ejector pin, make the kicking block top tight on the work piece, and then with the chain tensioning, therefore, adopt such design, the elasticity between not only is convenient for adjust chain and the work piece, and the operation is still lighter, convenient.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a front view of a chain according to an embodiment of the present invention;
fig. 2 is a side view of a chain according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a link plate of a chain according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a chain wrench according to another embodiment of the present invention.
In the drawings, 1 denotes a chain; 11 represents a link plate; 111 denotes a hinge portion; 112 denotes a shaft hole; 113 denotes a convex tooth; 12 denotes a pin; 2 denotes a forceps handle; 21 denotes a binding clip; 22 represents a hook; 23 denotes a chute; 24 denotes a relief hole; 3 denotes a tension assembly; 31 denotes a top block; 311 represents a relief; 32 denotes a threaded mandrel; 321 denotes a butterfly twist grip; and 33, a tension spring.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Example 1
As shown in fig. 1 to 3, embodiment 1 provides a chain, which includes a plurality of chain links hinged by a pin 12 in sequence, where the chain links include at least one link plate 11, and referring to fig. 1 and 3, the middle section of the link plate 11 is narrowed, hinge parts 111 are formed at two ends of the link plate 11, a shaft hole 112 is formed in the center of the hinge part 111, the link plates 11 of two adjacent chain links are connected by the pin 12 passing through the shaft hole 112, the edges of the hinge parts 111 are arc-shaped, and the edges of two opposite sides of each hinge part 111 are provided with arc-shaped protruding teeth 113.
The middle section of the chain plate 11 is narrowed, when the chain 1 is clamped on a workpiece, the side edges of the hinged parts 111 at the two ends of each chain plate 11 are in contact with the workpiece, and because the arc-shaped convex teeth 113 are arranged on the edges of the two opposite sides of the hinged parts 111 of the chain plate 11, the convex teeth 113 can increase the friction force of contact between the chain plate 11 and the workpiece, the friction force between the chain 1 and the workpiece is increased, the torque applied to the workpiece by a wrench is improved, and because the convex teeth 113 are arc-shaped, the damage to the workpiece is less.
As a preferred structure, referring to fig. 2, in two adjacent chain links, one of the two chain links has two link plates 11, the other chain link has one link plate 11, the two link plates 11 of one chain link are clamped on both sides of one link plate 11 of the other chain link, the shaft holes 112 at one ends of the three link plates 11 are aligned, and a pin 12 sequentially passes through the three aligned shaft holes 112, so that the connection between the chain links is realized. The two ends of the pin shaft 12 extend out of the chain plates 11 at the two sides for a certain distance, and when the chain-plate connecting device is used, the two ends of the pin shaft 12 can be hung on the clamping hooks 22 at the two sides so as to realize the clamping of the chain links and the clamping hooks 22.
Example 2
As shown in fig. 4, embodiment 2 provides a chain wrench, which includes a chain 1, a wrench handle 2 and a tensioning assembly, where the structure of the chain 1 is the same as that of the chain 1 in embodiment 1, a wrench head 21 is disposed at the front end of the wrench handle 2, one end of the chain 1 is hinged to one side of the wrench head 21, a hook 22 for being clamped with a link of the chain 1 is disposed at the other side of the wrench head 21, the tensioning assembly includes a top block 31 and a threaded mandril 32, a sliding slot 23 adapted to the top block 31 is disposed at the front end of the wrench head 21 along an axial direction, the top block 31 is slidably mounted in the sliding slot 23, the threaded mandril 32 axially penetrates through the front and rear ends of the wrench handle 2 and is in threaded fit with the wrench handle 2, the front end of the threaded mandril 32 is connected to the top block 31 to drive the top block 31 to move back and forth through the threaded mandril 32, and back ends of the threaded mandril 32 are.
During the use, the kicking block 31 is arranged in the spout 23, support binding clip 21 on treating the rotatory work piece, the expansion end of chain 1 is walked around the work piece and is blocked the corresponding chain link on chain 1 on the trip 22 of pincers handle 2, make chain 1 and work piece paste tightly basically, then twist screw thread ejector pin 32, it is ejecting along spout 23 with kicking block 31 through screw thread ejector pin 32, make kicking block 31 top tight on the work piece, and then with the tensioning of chain 1, therefore, adopt such design, the elasticity between the work piece and the regulation chain of not only being convenient for, and the operation is still relatively lighter, convenient.
In this embodiment, the front end of the threaded mandril 32 abuts against the top block 31, the threaded mandril 32 is sleeved with the tension spring 33, the front end of the tension spring 33 is connected with the top block 31, and the rear end of the tension spring 33 is connected with the forceps handle 2, so that when the threaded mandril 32 ejects the top block 31, the tension spring 33 extends, and when the threaded mandril 32 retracts, the top block 31 automatically returns to the chute 23 under the action of the tension spring 33, thereby realizing the automatic return of the top block 31.
In the embodiment, the front end of the clamp handle 2 is provided with the abdicating hole 24 communicated with the bottom of the sliding groove 23, the threaded mandril 32 penetrates through the abdicating hole 24, the tension spring 33 is arranged in the abdicating hole 24, and after the jacking block 31 returns, the tension spring 33 is completely retracted into the abdicating hole 24, so that the structure is more compact. And the front end surface of the top block 31 is provided with a ridge 311 in order to increase the frictional force between the top block 31 and the workpiece. In addition, in order to facilitate screwing the threaded post 32, a butterfly-shaped screwing knob 321 is provided at the rear end of the threaded post 32.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (8)
1. The utility model provides a chain, includes a plurality of links that loop through round pin axle articulated, its characterized in that: the chain links comprise at least one chain plate, the middle sections of the chain plates are narrowed, hinged parts are formed at two ends of each chain plate, shaft holes are formed in the centers of the hinged parts, the chain plates of two adjacent chain links are connected through pin shafts penetrating through the shaft holes, the edges of the hinged parts are arc-shaped, and arc-shaped convex teeth are arranged on the edges of two opposite sides of each hinged part.
2. Chain according to claim 1, characterized in that: in adjacent two of the chain link, one of them chain link has two link joints, and another chain link has a link joint, and two link joints of one chain link clamp in the both sides of a link joint of another chain link, and the shaft hole of three link joint one end aligns, one the round pin axle passes three shaft holes of aligning in proper order.
3. The chain according to claim 2, characterized in that: and two ends of the pin shaft extend out of the chain plates at two sides for a certain distance.
4. A chain wrench, comprising: the chain, the plier handle and the tensioning assembly according to any one of claims 1 to 3, wherein the front end of the plier handle is provided with a plier head, one end of the chain is hinged with one side of the plier head, the other side of the plier head is provided with a clamping hook used for being clamped with a chain link of the chain, the tensioning assembly comprises a top block and a threaded ejector rod, the front end of the plier head is provided with a sliding groove matched with the top block along the axial direction, the top block is slidably arranged in the sliding groove, the threaded ejector rod axially penetrates through the front end and the rear end of the plier handle and is in threaded fit with the plier handle, the front end of the threaded ejector rod is connected with the top block so as to drive the top block to move back and forth through the threaded ejector rod, and the rear end.
5. The chain wrench of claim 4, wherein: the front end of the threaded ejector rod is abutted to the ejector block, the threaded ejector rod is sleeved with a tension spring, the front end of the tension spring is connected with the ejector block, and the rear end of the tension spring is connected with the clamp handle.
6. The chain wrench of claim 5, wherein: the front end of the pliers handle is provided with a yielding hole communicated with the bottom of the sliding groove, the threaded ejector rod penetrates through the yielding hole, and the tension spring is arranged in the yielding hole.
7. The chain wrench of claim 4, wherein: the front end face of the top block is provided with a convex pattern.
8. The chain wrench of claim 4, wherein: and a butterfly-shaped screwing handle is arranged at the rear end of the threaded ejector rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920662739.7U CN209875859U (en) | 2019-05-09 | 2019-05-09 | Chain and chain wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920662739.7U CN209875859U (en) | 2019-05-09 | 2019-05-09 | Chain and chain wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875859U true CN209875859U (en) | 2019-12-31 |
Family
ID=68964558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920662739.7U Active CN209875859U (en) | 2019-05-09 | 2019-05-09 | Chain and chain wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209875859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220068810A (en) * | 2020-11-19 | 2022-05-26 | 씨피시스템(주) | Link connecting membrane of chain link and dust protection cover for the link connecting membrane |
-
2019
- 2019-05-09 CN CN201920662739.7U patent/CN209875859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220068810A (en) * | 2020-11-19 | 2022-05-26 | 씨피시스템(주) | Link connecting membrane of chain link and dust protection cover for the link connecting membrane |
| KR102482339B1 (en) * | 2020-11-19 | 2022-12-28 | 씨피시스템(주) | Dust protection cover for the cable chain |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |