Reducing pin shaft for bolt-free wire clamp

Abstract

The utility model relates to a variable-diameter pin shaft for a bolt-free wire clamp. The variable-diameter pin shaft comprises a pin shaft and a pin shaft variable-diameter part, one end of the pin shaft is a pin shaft head for limiting, and the other end of the pin shaft is provided with a limiting piece mounting structure for mounting the pin shaft limiting piece; one end, close to the limiting piece mounting structure, of the pin shaft is detachably connected with a pin shaft reducing part; the size of the outer side face of the pin shaft reducing part is smaller than that of the pin shaft, and a transition connecting section is formed at the end, close to the pin shaft, of the pin shaft reducing part. According to the scheme, the beneficial effects that installation operation is more convenient, stable connection can be guaranteed, long-term falling prevention is achieved, and potential safety hazards caused by improper installation are avoided are achieved, production and machining are more convenient and efficient, cost is low, and the connector is suitable for batch production and application.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway contact network devices, and in particular relates to a reducing pin shaft used for a boltless wire clamp. Background Art

[0002] "Wire clamp" is a part of the flexible suspension system of overhead contact network of electrified railway and rail transit, including positioning wire clamp and suspension wire clamp. Taking suspension wire clamp as an example, the two ends of suspension wire are connected to the load-bearing cable and contact wire through the suspension wire clamp. The current boltless wire clamp solves the problem of safety hazards caused by the simple bolt connection of traditional wire clamps. For example, the structure shown in the Chinese utility model patent with authorization announcement number CN210680465U adopts a basic cylindrical pin shaft, and requires interference insertion at one end of the pin shaft and clearance insertion at the other end, which still has inconvenience in parts processing and installation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a reducing pin shaft for a boltless wire clamp, so as to solve the problems of the existing technical solutions that are inconvenient to process and install, and are prone to potential safety hazards due to improper installation operations, and the like. Through the improved design of the pin shaft structure, the structure is simple and easy to process, while ensuring convenient installation operation and stable connection effect.

[0004] According to the technical solution of the utility model, the utility model provides a reducing pin for a boltless wire clamp, comprising a pin and a reducing portion of the pin; one end of the pin is a pin head for limiting, and the other end of the pin has a limit piece mounting structure for mounting a pin limit piece; the pin is detachably connected to the reducing portion of the pin at one end close to the limit piece mounting structure; the outer side surface dimension of the reducing portion of the pin is smaller than the outer side surface dimension of the pin, and the reducing portion of the pin is formed with a transition connection section at one end close to the pin.

[0005] Furthermore, the boltless wire clamp includes a first wire clamp member and a second wire clamp member; the first wire clamp member and the second wire clamp member are both provided with a wire clamp positioning portion, and the wire clamp positioning portion has a pin shaft hole; the first wire clamp member and the second wire clamp member are arranged opposite to each other, all the pin shaft holes are connected and have a reducing pin shaft inserted therethrough; the first wire clamp member and the second wire clamp member are connected to each other at the upper end and are provided with a positioning connecting member, and the first wire clamp member and the second wire clamp member are provided with a contact wire or a load-bearing cable at the lower end.

[0006] Furthermore, the size of the outer side surface of the pin matches the size of the inner side surface of the pin hole, and the size of the outer side surface of the pin head is larger than the size of the inner side surface of the pin hole.

[0007] Furthermore, the length of the pin shaft and the length of the pin shaft reducing portion are both greater than the distance between the two wire clamp positioning portions that are farthest apart.

[0008] In some embodiments, the pin reducer has a first threaded portion at one end close to the transition section, and the pin has a second threaded portion at one end away from the pin head, and the first threaded portion and the second threaded portion are threadedly connected in a matching manner.

[0009] In other embodiments, the pin shaft reducing portion has a first snap-on portion at one end close to the transition connection section, the first snap-on portion includes a claw portion and a clamping block located on the claw portion; the pin shaft is provided with a second snap-on portion at the end away from the pin shaft head, the second snap-on portion is an axial blind hole, and a radial through hole is opened on the side wall, the radial through hole corresponds to the clamping block, and the pin shaft reducing portion and the pin shaft are snap-connected by matching the first snap-on portion and the second snap-on portion.

[0010] Preferably, two radial through holes are opened on two opposite sides of the pin shaft, and the radial through holes form a stopper installation structure.

[0011] According to some embodiments, the pin head is an annular boss structure, or the pin head has plate-shaped protrusions at least on two sides.

[0012] Preferably, the pin shaft and the pin shaft reducing portion are both cylindrical, and the transition connection section is conical.

[0013] Preferably, the pin shaft reducing portion has an operating portion at an end away from the pin shaft, and the outer side dimension of the operating portion is larger than the outer side dimension of the pin shaft.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] 1. When installing the reducing pin shaft for the boltless wire clamp of the utility model, the pin shaft is pulled out to the thin-diameter part of the reducing pin shaft as the working axis of the boltless wire clamp. At this time, since the pin shaft hole of the boltless wire clamp is slightly larger than the working axis, the jaws at the lower end of the boltless wire clamp can be opened, so that the contact wire (or load-bearing cable) can be installed; then the pin shaft is restored to its original position, and the thick-diameter part with the same size as the pin shaft hole is used as the working axis. At this time, the jaws will be tightly closed to achieve a stable clamping and positioning of the contact wire (or load-bearing cable); after the installation is completed, the reducing pin shaft portion can be disassembled to reduce the overall weight of the boltless wire clamp, and then the pin shaft limiter can be installed to further ensure the position of the pin shaft; in this way, the installation process is simple and quick, and the connection effect is long-term and stable; and the disassembled reducing pin shaft portion can also be reused in the installation process of other boltless wire clamps.

[0016] 2. The reducing pin used for the boltless wire clamp of the utility model only has clear requirements on the outer diameter of the main part of the pin, and the main part of the pin is a standard cylindrical shape. The sizes of all the pin holes of the boltless wire clamp are also the same and match the main part of the pin, and there is no need to process them into interference fit and clearance fit respectively; for example, for the contact wire clamp, the reducing part of the pin only needs to have an outer diameter smaller than the pin hole, and for the load-bearing cable clamp, the outer diameter size of the pin is specifically matched according to the size specifications of the load-bearing cable, and there are no strict requirements on materials, precision, etc. for both; therefore, the processing is convenient, efficient, and low-cost, and is suitable for mass production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a threaded variable diameter pin shaft and a pin shaft limiting member in one embodiment.

[0018] Figure 2 It is a structural schematic diagram of a snap-on reducing pin shaft and a pin shaft limiting member in another embodiment of the utility model.

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure of the first buckle part at another angle.

[0020] Figure 4 It is a structural schematic diagram of a pin shaft limiting member and a limiting member installation structure of yet another embodiment of the utility model.

[0021] Figure 5 The utility model is a schematic structural diagram of a boltless wire clamp equipped with a reducing pin shaft according to an embodiment of the present invention.

[0022] Figure 6 The utility model is a structural schematic diagram of a boltless wire clamp equipped with a reducing pin shaft according to another embodiment of the present invention.

[0023] Description of reference numerals in the accompanying drawings:

[0024] 1. Pin;

[0025] 2. Pin reducing part;

[0026] 3. Pin head;

[0027] 4. Pin limiter;

[0028] 5. Limiting parts installation structure;

[0029] 6. Transition connection section;

[0030] 7. First line clamp;

[0031] 8. Second line clamp;

[0032] 9. Wire clamp positioning part;

[0033] 10. Pin hole;

[0034] 11. Positioning connector;

[0035] 12. Claws;

[0036] 13. Card block;

[0037] 14. Axial blind hole;

[0038] 15. Radial through hole;

[0039] 16. a first screw connection portion;

[0040] 17. A second screw connection portion;

[0041] 18. Operation department. DETAILED DESCRIPTION

[0042] The utility model provides a reducing pin shaft for a boltless wire clamp, which solves the problems of the prior art solutions that are inconvenient to process and install, and are prone to potential safety hazards due to improper installation operations, and the like. Through the improved design of the pin shaft structure, the structure is simple and easy to process, while ensuring convenient installation operation and stable connection effect.

[0043] See also Figure 2 , Figure 5 A reducing pin for a boltless wire clamp according to an embodiment of the utility model comprises a pin 1 and a pin reducing portion 2. One end of the pin 1 is a pin head 3 for limiting, and the other end of the pin 1 has a stopper mounting structure 5 for mounting a pin stopper 4. The pin 1 is detachably connected to the pin reducing portion 2 at one end close to the stopper mounting structure 5. The outer side dimension of the pin reducing portion 2 is smaller than the outer side dimension of the pin 1, and the pin reducing portion 2 is formed with a transition connection section 6 at one end close to the pin 1.

[0044] The boltless wire clamp applicable to the variable diameter pin shaft of the utility model adopts, for example, a structure similar to that in the Chinese utility model patent with authorization announcement number CN210680465U, preferably, the boltless wire clamp includes a first wire clamp member 7 and a second wire clamp member 8; the front and rear ends of the first wire clamp member 7 and the second wire clamp member 8 are provided with a wire clamp positioning portion 9, and the wire clamp positioning portion 9 has a pin shaft hole 10; the first wire clamp member 7 and the second wire clamp member 8 are arranged opposite to each other, all the pin shaft holes 10 are connected and have a variable diameter pin shaft inserted therein; the first wire clamp member 7 and the second wire clamp member 8 are connected to each other at the upper end and are provided with a positioning connector 11, and the first wire clamp member 7 and the second wire clamp member 8 form a jaw at the lower end for clamping the contact wire or the load-bearing cable.

[0045] Understandably, Figure 5 , Figure 6All of them are demonstrated by taking the contact line clamp as an example; the jaws of the contact line clamp match the shape of the contact line, and the jaws of the load-bearing cable clamp match the shape of the load-bearing cable; the load-bearing cable clamp is located above the contact line clamp in the overall contact network system, and is upside down relative to the placement of the contact line clamp, so that the contact line clamp clamps the contact line at the bottom and the load-bearing cable clamp clamps the load-bearing cable at the top; the "upper" and "lower" mentioned in the utility model are defined and explained based on the drawings to facilitate a clear description of the structure of the present scheme, and are not a limitation on the actual application of the present scheme.

[0046] In a preferred specific embodiment, both the first wire clamp 7 and the second wire clamp 8 are components made of sheet metal by sheet metal processing, which are more environmentally friendly, more stable in quality, lighter in weight, and have many advantages over traditional casting and forging processes, such as economies of scale. The lower end of the positioning connector 11 is fixed integrally with the first wire clamp 7 or the second wire clamp 8, or the positioning connector 11 is an independent component, and the lower end is matched and clamped and installed between the first wire clamp 7 and the second wire clamp 8. The positioning connector 11 is, for example, a positioning pin or a positioning sleeve, and the upper end has other connectors such as a through hole for connecting the wrist arm positioner, such as a positioning pin sleeve; and a jaw for installing a contact wire or a load-bearing cable.

[0047] More specifically, for example, Figure 5 The figure shows an integrated suspension string clamp, wherein the positioning connector 11 is a suspension string connection part, and the first wire clamp part 7 and the second wire clamp part 8 are provided with abutment parts extending inwards on both sides of the positioning connector 11, so as to butt against each other at the upper end. In other embodiments, there is only one buttment part, which is provided on a wire clamp part without the positioning connector 11, and the end of the buttment part butts against the transition connection section positioned between the lower end of the positioning connector 11 and the wire clamp part, and more preferably, the shape of the end of the buttment part matches the shape of the transition connection section. Figure 6 The positioning wire clamp is shown, which is fixed with a positioning connector 11 (such as a positioning pin) by means of the semicircular butt joints on both sides. The above structure, function, etc. are clear based on the drawings and common knowledge in the art, and the structural features can be replaced or combined as needed, so no further elaboration is given here.

[0048] The main part of the pin 1 is a thick diameter section, the outer side dimension of the pin 1 matches the inner side dimension of the pin hole 10 (i.e., the same or with a small difference for easy loading and unloading), and the outer side dimension of the pin head 3 is larger than the inner side dimension of the pin hole 10. The main part of the pin reducer 2 is a thin diameter section. The length of the main part of the pin 1 and the length of the main part of the pin reducer 2 are both larger than the distance between the two farthest wire clamp positioning parts 9. During installation and use, pull out the reducing pin to the thin-diameter section as the working axis of the positioning wire clamp (all the pin holes 10 are thin-diameter sections). At this time, since the pin hole 10 is slightly larger than the working axis, the upper and lower jaws of the boltless wire clamp can be rotated and opened, so that the split positioning connector 11, contact wire or load-bearing cable can be installed; then restore the reducing pin to its original position and use the thick-diameter section as the working axis (all the pin holes 10 are thick-diameter sections). After the installation is completed, the upper and lower ends of the boltless wire clamp will tightly close / clamp the components to achieve a stable positioning connection; after the installation is completed, the pin reducing part 2 can be disassembled to reduce the overall weight of the boltless wire clamp, and then the pin limiter 5 can be installed to further ensure that the position of the reducing pin will not move or fall out; in this way, the installation process is simple and quick, and the connection effect is long-term and stable; and the disassembled pin reducing part 2 can also be reused in the installation process of other boltless wire clamps. In addition, the pin diameter reducing portion 2 of the present invention can be freely configured, so that the required jaw opening size can be achieved according to the situation, for example, it can be adapted to various diameters of the load-bearing cables (such as the 150mm commonly used in China). 2 -120mm 2 , 120mm 2 -95mm 2 、150mm 2 -120mm 2 -95mm 2 wait).

[0049] exist Figure 1 In the illustrated embodiment, the pin reducer 2 and the pin 1 adopt a detachable mounting structure connected by threading. The pin reducer 2 has a first threaded portion 16 at one end close to the transition section 6, and the pin 1 has a second threaded portion 17 at one end away from the pin head 3. The first threaded portion 16 and the second threaded portion are threadedly connected in a matching manner. More specifically, for example, one of the first threaded portion 16 and the second threaded portion 17 is a stud, and the other is a screw hole.

[0050] exist Figure 2 , Figure 3In the illustrated embodiment, the pin reducer 2 and the pin 1 adopt a detachable mounting structure of snap-fit ​​connection. The pin reducer 2 has a first snap-fit ​​portion at one end close to the transition connection section 6. The first snap-fit ​​portion, for example, includes one or more claws 12 and a block 13 located on the claw 12. The claw 12 is, for example, a plate with a certain elasticity. The block 13 preferably has a chamfer on the edge. The pin 1 is provided with a second snap-fit ​​portion at the end away from the pin head 3. The second snap-fit ​​portion is, for example, an axial blind hole 14, and a radial through hole 15 is opened on the side wall. The radial through hole 15 corresponds to the block 13. The pin reducer 2 and the pin 1 are snap-fitted and connected by matching the first snap-fit ​​portion and the second snap-fit ​​portion. During installation, under the action of the side wall of the axial blind hole 14 of the second snap-in portion, the insertion of the pin reducer 2 will cause the claw portion 12 of the first snap-in portion to elastically deform and close, so that the block 13 can be inserted into the axial blind hole 14 of the second snap-in portion. When the block 13 continues to penetrate into the radial through hole 15, the block 13 will pop outward and engage in the radial through hole 15 under the action of the elastic restoring force of the claw portion 12, thereby realizing the rapid installation (and disassembly) of the pin reducer 2 and the pin 1.

[0051] Further preferably, the radial through holes 15 are two opened on opposite sides of the pin shaft 1, and the radial through holes 15 form a stopper installation structure 5. The pin shaft stopper 4 is a long strip structure such as a split pin, and the pin shaft stopper 4 passes through the two radial through holes 15, thereby locking the end of the pin shaft 1 to prevent it from falling out. This structure is simpler and more ingenious. Of course, the radial through hole 15 can also be independent of the stopper installation structure 5; and other buckle structures, pin shaft stoppers and stopper installation structures can also be used.

[0052] exist Figure 4 In another embodiment shown, the stopper installation structure 5 is an annular groove, and the pin stopper 4 is an elastic retaining ring for the shaft, which can be embedded, sleeved and fixed outside the pin 1 to form a stopper structure larger than the pin hole 10. This pin 1 can also be combined with the above-mentioned buckle, screw connection or other methods to form a detachable connection with the pin reducer 2.

[0053] The pin head 3 is, for example, an annular boss structure (such as Figure 1 Alternatively, the pin head 3 has plate-shaped protrusions located at least on both sides (as shown in Figure 2 As shown), for example, a flat structure is formed; or, the pin head 3 can also adopt a through hole and a split pin structure; any specific structure that can achieve the limit position is preferred. It is preferably a fixedly arranged protruding structure, which has a simple structure and is easy to install, and Figure 1 The ring structure shown has better stability. Figure 2The flat structure shown is more convenient for handheld operation. In some embodiments, the pin head 3 can also be used to connect the equal voltage line (also called current line) of the suspension string. For example, a hole-like structure is provided on the pin head 3, and then the equal voltage line is inserted into the hole for conductive fixed installation connection, which can meet the equal voltage requirements of national railway standards and provide a variety of equal voltage line connection methods.

[0054] In a preferred embodiment, the pin 1 and the pin reducing portion 2 are both cylindrical, and the transition connection section 6 is conical. The transition connection section 6 forms a smooth transition between the pin 1 and the pin reducing portion 2 and plays a guiding role, making it easier to move the reducing pin during installation.

[0055] In a preferred embodiment, the pin reducer 2 has an operating portion 18 at one end away from the pin 1, and the outer side dimension of the operating portion 18 is larger than the outer side dimension of the pin 1, thereby forming a limit to prevent the reducer pin from completely slipping out of the pin hole 10 during installation, which increases the installation time. Figure 2 In the embodiment shown, the operating portion 18 has two arrow-shaped plates, which are flat as a whole, so as to facilitate hand-held operation. Figure 1 In the illustrated embodiment, the operating portion 18 is in the shape of a ring or a hook with a through hole, which is convenient for operation; especially for the threaded connection in this embodiment, a hard rod-like tool can be inserted into the through hole of the operating portion 18 for easy screwing.

[0056] To sum up, compared with the existing technical solutions, the reducing pin for boltless wire clamp of the utility model achieves the beneficial effects of more convenient installation operation, stable connection, long-term anti-detachment, and avoidance of safety hazards caused by improper installation; moreover, in the present solution, only the outer diameter of the main part of the pin is clearly required, and the main part of the pin is a standard cylindrical shape, and the sizes of all the pin holes of the boltless wire clamp are also the same and match the main part of the pin, without the need for processing into interference fit and clearance fit; the reducing part of the pin only needs to have an outer diameter smaller than the pin hole, and there are no strict requirements on materials, precision, etc.; therefore, production and processing are more convenient, efficient, and low-cost, and suitable for mass production and application.

Claims

1. A reducing pin for a boltless wire clamp, characterized in that: The invention comprises a pin shaft (1) and a pin shaft reducing portion (2); one end of the pin shaft (1) is a pin shaft head portion (3) for limiting, and the other end of the pin shaft (1) is provided with a limiting member mounting structure (5) for mounting a pin shaft limiting member (4); the pin shaft (1) is detachably connected to the pin shaft reducing portion (2) at one end close to the limiting member mounting structure (5); the outer side surface dimension of the pin shaft reducing portion (2) is smaller than the outer side surface dimension of the pin shaft (1), and the pin shaft reducing portion (2) is formed with a transition connection section (6) at one end close to the pin shaft (1); The boltless wire clamp comprises a first wire clamp component (7) and a second wire clamp component (8); the first wire clamp component (7) and the second wire clamp component (8) are both provided with a wire clamp positioning portion (9), and the wire clamp positioning portion (9) has a pin shaft hole (10); the first wire clamp component (7) and the second wire clamp component (8) are arranged opposite to each other, and all the pin shaft holes (10) are interlinked and penetrated by the reducing pin shaft; the first wire clamp component (7) and the second wire clamp component (8) are connected to each other at the upper end and are provided with a positioning connecting component (11), and the first wire clamp component (7) and the second wire clamp component (8) are provided with a contact wire or a load-bearing cable at the lower end; The length of the pin shaft (1) and the length of the pin shaft reducing portion (2) are both greater than the distance between the two wire clamp positioning portions (9) that are farthest apart.

2. The reducing pin for boltless wire clamp according to claim 1, characterized in that: The outer side dimension of the pin shaft (1) matches the inner side dimension of the pin shaft hole (10), and the outer side dimension of the pin shaft head (3) is greater than the inner side dimension of the pin shaft hole (10).

3. The reducing pin for boltless wire clamp according to claim 1, characterized in that: The pin shaft reducing portion (2) has a first threaded portion (16) at one end close to the transition connection section (6), and the pin shaft (1) has a second threaded portion (17) at one end away from the pin shaft head (3), and the first threaded portion (16) and the second threaded portion are threadedly connected in a matching manner.

4. The reducing pin for boltless wire clamp according to claim 1, characterized in that: The pin shaft reducing portion (2) has a first snap-fit ​​portion at one end close to the transition connection section (6), the first snap-fit ​​portion comprising a claw portion (12) and a clamping block (13) located on the claw portion (12); the pin shaft (1) has a second snap-fit ​​portion at one end away from the pin shaft head portion (3), the second snap-fit ​​portion is an axial blind hole (14), and a radial through hole (15) is formed on the side wall, the radial through hole (15) corresponds to the clamping block (13), and the pin shaft reducing portion (2) and the pin shaft (1) are snap-fitted to each other through the first snap-fit ​​portion and the second snap-fit ​​portion.

5. The reducing pin for boltless wire clamp according to claim 4, characterized in that: The radial through holes (15) are two holes opened on two opposite sides of the pin shaft (1), and the radial through holes (15) form the position-limiting member mounting structure (5).

6. The reducing pin for boltless wire clamp according to any one of claims 1 to 4, characterized in that: The pin shaft head (3) is an annular boss structure, or the pin shaft head (3) has plate-shaped bosses at least on two sides.

7. The reducing pin for boltless wire clamp according to any one of claims 1 to 4, characterized in that: The pin shaft (1) and the pin shaft reducing portion (2) are both cylindrical, and the transition connection section (6) is conical.

8. The reducing pin for boltless wire clamp according to any one of claims 1 to 4, characterized in that: The pin shaft reducing portion (2) has an operating portion (18) at one end away from the pin shaft (1), and the outer side dimension of the operating portion (18) is greater than the outer side dimension of the pin shaft (1).

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