CN216413310U

CN216413310U - Prevent not hard up bolt type palm terminal of cable

Info

Publication number: CN216413310U
Application number: CN202123327326.XU
Authority: CN
Inventors: 陆海东; 张建华
Original assignee: Jiangsu Jiameng Electrical Equipment Co ltd
Current assignee: Jiangsu Jiameng Electrical Equipment Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-29
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to the technical field of wiring terminals, in particular to a bolt type middle palm terminal capable of preventing a cable from loosening; the device comprises an equipment connecting end, a cable connecting end, a torque bolt and a backstop screw; a fixed cavity with one end opened outwards is arranged in the cable connecting end; a plurality of convex blocks which are convex outwards are arranged on the outer side of the cable connecting end, a first threaded through hole is arranged in the center of each convex block, and the first threaded through hole is communicated with the outer side and the fixing cavity; the torque bolt is screwed into the first threaded through hole, and the bottom end of the torque bolt extends into the fixed cavity; a clamping groove is formed in the side face of the torque bolt; the side face of the lug is provided with a second thread through hole which is communicated with the outer side and the first thread through hole, the retaining screw is screwed into the second thread through hole, and the bottom end of the retaining screw extends into the clamping groove. The utility model aims to provide a bolt type middle palm terminal for preventing a cable from loosening, which can effectively prevent the cable from loosening.

Description

Prevent not hard up bolt type palm terminal of cable

Technical Field

The utility model relates to the technical field of wiring terminals, in particular to a bolt type middle palm terminal capable of preventing a cable from loosening.

Background

The bolt type middle palm terminal is one of the wiring terminals and is suitable for connecting copper, aluminum and aluminum alloy conductor cables with equipment such as transformers, switch cabinets, cable distribution boxes and the like. As shown in fig. 1, an open hole is formed at one end of a conventional bolt-type palm terminal structure, a threaded through hole is formed in a side wall of the hole, a cable is inserted into the hole, and then a bolt is screwed into the threaded through hole of the side wall and presses the cable to fix the cable. Because the lateral wall thickness in hole is less, consequently the thread quantity of screw thread through-hole is less, the interlock ability between bolt and the screw thread through-hole is less, and the screw thread through-hole can only restrict a middle subsection of bolt, the bolt both ends produce easily and rock, finally the bolt is easy to be rotated because of the shake produces in electrical equipment's use and leads to the bolt to roll back, and then loosen and compress tightly the cable, make the cable can not keep good electrical contact with the terminal in electrical equipment's operation, can drop even, cause great potential safety hazard.

In view of the above problems, the present designer designs a bolt type palm terminal for preventing cable loosening based on practical experience and professional knowledge that is abundant over many years in engineering application of such products, and actively makes research and innovation in cooperation with the application of theory, so as to effectively prevent cable loosening.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bolt type middle palm terminal for preventing a cable from loosening aiming at the defects in the prior art, and solves the problem that the bolt in the existing bolt type middle palm terminal is easy to retreat to cause the cable to loosen.

In order to achieve the purpose, the utility model adopts the technical scheme that the device comprises an equipment connecting end, a cable connecting end, a torque bolt and a backstop screw;

a fixing cavity with one end opened outwards is arranged in the cable connecting end; a plurality of convex blocks which are convex outwards are arranged on the outer side of the cable connecting end, a first threaded through hole is arranged in the center of each convex block, and the outer side of each first threaded through hole is communicated with the fixing cavity; the torque bolt is screwed into the first threaded through hole, and the bottom end of the torque bolt extends into the fixing cavity; a clamping groove is formed in the side face of the torque bolt; the side face of the lug is provided with a second thread through hole which is communicated with the outer side and the first thread through hole, the retaining screw is screwed into the second thread through hole, and the bottom end of the retaining screw extends into the clamping groove.

Furthermore, the clamping grooves are arranged and evenly distributed on the circumferential direction of the side face of the torque bolt.

Furthermore, the number of the protruding blocks is two, and the protruding blocks are respectively arranged corresponding to two ends of the fixed cavity.

Further, an angle is formed between the central axes of the two second threaded through holes in the two lugs.

Furthermore, a plurality of convex ribs distributed along the direction of the central axis of the fixed cavity are arranged on the side wall of the fixed cavity, and each convex rib is vertically arranged relative to the central axis of the fixed cavity.

Furthermore, the cross section of each convex rib is trapezoidal.

Further, the convex rib is arranged on one side, opposite to the first threaded through hole, in the fixing cavity.

Further, the equipment connecting end is provided with a through hole.

Through the technical scheme of the utility model, the following technical effects can be realized:

according to the designed bolt type middle palm terminal capable of preventing the cable from loosening, the bump is arranged, so that the whole length of the first threaded through hole can be longer, more threads are matched with the torque bolt in the first threaded through hole, the friction force is increased, and the joint of the first threaded through hole and the torque bolt is closer to two ends of the torque bolt, so that the shaking amplitude of the torque bolt is reduced, and the torque bolt is difficult to rotate in a backspacing mode; when the shaking amplitude is very large and the structure is not enough to prevent the torque bolt from rotating backwards, the torque bolt is limited to rotate by the retaining screw with the bottom end extending into the clamping groove, and the retaining effect of the torque bolt is further ensured.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a conventional bolt-type palm terminal in the background of the present invention;

fig. 2 is a schematic structural view of a bolt-type palm terminal for preventing a cable from loosening according to an embodiment of the present invention;

fig. 3 is a structural exploded view of a bolt-type palm terminal for preventing loosening of a cable according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a bolt-type palm terminal for preventing loosening of a cable according to an embodiment of the present invention (the torque bolt is hidden);

reference numerals: the device comprises a device connecting end 1, a cable connecting end 2, a fixing cavity 21, a convex block 22, a first threaded through hole 23, a second threaded through hole 24, a convex rib 25, a torque bolt 3, a clamping groove 31 and a retaining screw 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

A bolt type middle palm terminal for preventing a cable from loosening is shown in figures 2-4 and comprises an equipment connecting end 1, a cable connecting end 2, a torque bolt 3 and a backstop screw 4; the equipment connecting end 1 is provided with a through hole, and a screw penetrates through the through hole to fixedly install the equipment connecting end 1 on the electrical equipment; a fixing cavity 21 with one end opened outwards is arranged in the cable connecting end 2; a plurality of convex blocks 22 which are convex outwards are arranged on the outer side of the cable connecting end 2, a first threaded through hole 23 is arranged in the center of each convex block 22, and the first threaded through hole 23 is communicated with the outer side and the fixing cavity 21; the torque bolt 3 is screwed into the first threaded through hole 23, and the bottom end of the torque bolt extends into the fixed cavity 21; a clamping groove 31 is formed in the side face of the torque bolt 3; the side of the bump 22 is provided with a second thread through hole 24 for communicating the outer side with the first thread through hole 23, the retaining screw 4 is screwed into the second thread through hole 24, and the bottom end of the retaining screw extends into the clamping groove 31.

Specifically, the palm terminal is used as follows: firstly, a cable is plugged into the fixing cavity 21 from the opening, then the torque bolt 3 is screwed into the first threaded through hole 23 until the bottom end of the torque bolt 3 compresses the cable, the clamping groove 31 is aligned with the second threaded through hole 24, then the retaining screw 4 is screwed into the second threaded through hole 24 until the bottom end of the retaining screw 4 enters the clamping groove 31, and connection and installation of the cable and the middle palm terminal are completed. Compared with the middle-sole terminal in the prior art, the middle-sole terminal has the advantages that the overall length of the first threaded through hole 23 can be longer through the arranged convex block 22, so that more threads of the first threaded through hole 23 are matched with the torque bolt 3, the friction force is increased, and the joint of the first threaded through hole 23 and the torque bolt 3 is closer to two ends of the torque bolt 3, so that the shaking amplitude of the torque bolt 3 is reduced, and the torque bolt 3 is difficult to rotate in a backspacing mode; when the shaking amplitude is very large and the structure is caused to be insufficient to prevent the torque bolt 3 from rotating backwards, the torque bolt 3 is limited to rotate by the retaining screw 4 with the bottom end extending into the clamping groove 31, the side wall of the clamping groove 31 can apply force along the radial direction of the retaining screw 4 to the retaining screw 4, the retaining screw 4 and the second threaded through hole 24 are clamped tightly, the backing-back of the retaining screw 4 is prevented, and the retaining effect of the retaining screw 4 on the torque bolt 3 is ensured.

Because the cable has multiple different diameter models, corresponds different cables, and the angle that moment bolt 3 stopped when compressing tightly all can be different, and in order to increase this well palm terminal's general use nature, draw-in groove 31 sets up a plurality of, and evenly distributes in the side circumference of moment bolt 3, guarantees that stopping screw 4 can rotate the restriction to moment bolt 3 under the different angles.

Preferably, the lug 22 sets up two, and corresponds the both ends in fixed chamber 21 respectively and set up, makes the moment bolt 3 all compress tightly the both ends of cable part in fixed chamber 21, prevents that the cable from producing to rock and lead to becoming flexible. A certain angle is preferably formed between the central axes of the two second threaded through holes 24 in the two protrusions 22, so that the moment bolt 3 can drive the cable to generate a certain serpentine bending when pressing the cable, and further the fixing effect on the cable is improved.

Preferably, set up the protruding muscle 25 that a plurality of distributes along fixed chamber 21 central axis direction on the lateral wall of fixed chamber 21, and every protruding muscle 25 sets up for fixed chamber 21 central axis is perpendicular, and protruding muscle 25 is preferred to be set up in fixed chamber 21 with the one side that first screw through-hole 23 is relative, and when moment bolt 3 compressed tightly the cable, the another side of cable also can compress tightly protruding muscle 25 and interlock with protruding muscle 25 to further promote the fixed effect to the cable. The cross section of each rib 25 is preferably trapezoidal, so that the meshing depth of the ribs 25 to the cables can be effectively improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A bolt type middle palm terminal capable of preventing a cable from loosening is characterized by comprising an equipment connecting end (1), a cable connecting end (2), a torque bolt (3) and a backstop screw (4);

a fixing cavity (21) with one end opened outwards is arranged in the cable connecting end (2); a plurality of convex blocks (22) which are convex outwards are arranged on the outer side of the cable connecting end (2), a first threaded through hole (23) is arranged in the center of each convex block (22), and the outer side of each first threaded through hole (23) is communicated with the fixing cavity (21); the torque bolt (3) is screwed into the first threaded through hole (23), and the bottom end of the torque bolt extends into the fixed cavity (21); a clamping groove (31) is formed in the side face of the torque bolt (3); the side surface of the convex block (22) is provided with a second thread through hole (24) which is communicated with the outer side and the first thread through hole (23), the retaining screw (4) is screwed into the second thread through hole (24), and the bottom end of the retaining screw extends into the clamping groove (31).

2. The cable looseness resistant bolt-type palm terminal as claimed in claim 1, wherein said catching grooves (31) are provided in plural number and uniformly distributed in a side circumferential direction of said torque bolt (3).

3. The cable looseness resistant bolt-type palm terminal as claimed in claim 1, wherein said projections (22) are provided in two and provided respectively corresponding to both ends of said fixing cavity (21).

4. The cable looseness resistant bolt-type palm terminal as claimed in claim 3, wherein an angle is formed between central axes of two of said second threaded through holes (24) in two of said projections (22).

5. The cable looseness resistant stud-type palm terminal as claimed in claim 1, wherein a plurality of ribs (25) are provided on a side wall of said fixing cavity (21) in a direction along a central axis of said fixing cavity (21), and each of said ribs (25) is provided perpendicularly with respect to said central axis of said fixing cavity (21).

6. A cable looseness resistant bolt-type palm terminal as claimed in claim 5, wherein each of said ribs (25) has a trapezoidal cross section.

7. Cable looseness resistant stud-type palm terminal according to claim 5 or 6, wherein the rib (25) is provided in the fixing cavity (21) on a side opposite to the first threaded through hole (23).

8. The cable looseness resistant stud-type palm terminal as claimed in claim 1, wherein said equipment connection end (1) is provided with a through hole.