CN219874133U

CN219874133U - Split type connecting terminal

Info

Publication number: CN219874133U
Application number: CN202321274035.5U
Authority: CN
Inventors: 周光荣; 张亮
Original assignee: Changzhou Zhilu New Energy Technology Co ltd; Suzhou Zhilv Technology Co ltd
Current assignee: Changzhou Zhilu New Energy Technology Co ltd; Suzhou Zhilv Technology Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-20
Anticipated expiration: 2033-05-24

Abstract

The utility model discloses a split type connecting terminal, which comprises a terminal main body, a terminal connecting body and a connecting bolt, wherein the terminal main body comprises a connecting part and a connecting head part which are connected into a whole, the tail end of the terminal connecting body is provided with a concave connecting groove, the outer wall of the connecting head part is matched with the inner wall of the connecting groove so as to form surface contact between the connecting head part and the connecting groove, and a group of spring contact fingers are arranged between the connecting head part and the connecting groove in a ring manner so as to enable the connecting head part and the connecting groove to be in current bearing connection; the axle center of connecting head and connecting recess is coaxial to be provided with the screw hole, connecting bolt is built-in the connecting head and with the screw hole spiro union will terminal main part and terminal connector fasten into an organic wholely. According to the scheme, the connection stability between the terminal main body and the terminal connecting body is guaranteed through the built-in connecting bolt, and the current bearing capacity and reliability between the terminal main body and the terminal connecting body are guaranteed through the spring contact finger.

Description

Split type connecting terminal

Technical Field

The utility model relates to the technical field of connecting terminals, in particular to a split type connecting terminal.

Background

The new energy automobile needs to charge through charging gun and electric connection of charging stake, and wherein connecting terminal is the essential part that charging gun realized electric connection. In order to ensure the stability of electrical connection, conventional connection terminals are generally of one-piece construction, one end of which is connected to a cable and the other end is connected to a terminal body. However, the integral connection terminal has some use problems, especially a spring-type terminal or a slot terminal. Firstly, when the connecting terminal is welded with the cable by ultrasonic, the connection part between the plug-in signal terminal and the two ends of the connecting cable is easy to be damaged or broken due to high-frequency vibration generated by ultrasonic, and the damage or the crack is in the terminal and cannot be detected, so that the electric connection of the connecting terminal is greatly unstable and inconvenient to use.

On the other hand, because the long-term circulation of heavy current in the connecting terminal, the connecting terminal is easy to damage with the connecting end of the signal terminal after repeated plug, and then the whole connecting terminal is damaged, the whole connecting device system needs to be replaced, and the large use and maintenance cost is caused.

The existing connecting terminals also have a split type structure, such as a separable charging gun pin terminal disclosed in publication number CN 210224352U and a charging gun provided with the pin terminal, wherein a screw structure is formed between the head and the tail of the terminal, so that the two terminals are electrically connected after being screw-connected into a whole. However, in such a structure, the connection between the head and the tail of the connection terminal and the current conduction are all close to the screw connection portion between the two, and the screw connection portion has no other limited structure or protection structure outside, so that the screw connection portion is easily loosened or broken due to the influence of the external environment, and stable and reliable electrical connection cannot be ensured.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a split type connecting terminal.

The aim of the utility model is achieved by the following technical scheme:

the split type connecting terminal comprises a terminal main body used for electric connection, a terminal connecting body used for connecting a cable and a connecting bolt, wherein the terminal main body comprises a connecting part and a connecting head part which are connected into a whole, the tail end of the terminal connecting body is provided with a concave connecting groove, the outer wall of the connecting head part is matched with the inner wall of the connecting groove to enable surface contact between the connecting head part and the connecting groove to be formed, and a group of spring contact fingers are arranged between the connecting head part and the connecting groove in a surrounding mode to enable the connecting head part and the connecting groove to be electrically connected; the axle center of connecting head and connecting recess is coaxial to be provided with the screw hole, connecting bolt is built-in the connecting head and with the screw hole spiro union will terminal main part and terminal connector fasten into an organic wholely.

Preferably, the outer diameter of the connecting head is smaller than that of the terminal main body, so that a step surface is formed between the connecting head and the connecting head, the thickness of the port of the connecting groove is matched with that of the step surface, and the terminal main body and the terminal connecting body are fastened into a whole to form a smooth continuous outer wall.

Preferably, the step surface is provided with at least two concave bayonets which are oppositely arranged, the port of the connecting groove is provided with a clamping block matched with the bayonets, and when the terminal main body and the terminal connecting body are fastened into a whole, the clamping block is clamped in the bayonets.

Preferably, a first spring contact finger is abutted between the front end part of the connecting head part and the bottom of the connecting groove.

Preferably, a second spring contact finger is abutted between the outer wall of the connecting head part and the groove wall of the connecting groove.

Preferably, the first spring contact finger and the second spring contact finger are annular formed by endless spirals.

Preferably, the inner wall of the connecting head is formed with a concave part matched with the head of the connecting bolt, and the head of the connecting bolt is embedded in the concave part.

Preferably, the connecting part is in a cylinder shape formed by a group of elastic pieces uniformly distributed at intervals in the circumferential direction, the front end of the elastic piece is fixedly connected with the tail end of the connecting head, the outer wall of the tail end of the elastic piece is concavely formed into an annular clamping groove, and a clamping ring is clamped in the annular clamping groove to limit the outer diameter deformation range of the elastic piece.

Preferably, the connecting part is a pipe body fixedly connected with the tail end of the connecting head part, and a third contact finger which is in contact with the inner wall of the connecting part is arranged in the connecting part.

Preferably, the front end of the terminal connector is fixedly connected with the cable, and the fixing mode of the front end and the cable is welding, crimping or screwing.

The beneficial effects of the utility model are mainly as follows:

1. the terminal body and the terminal connector form a detachable and connectable split structure through the connecting structure built in the connecting bolt, so that the terminal connector can be fixedly connected with a cable in any mode and is connected with the terminal body after the cable is fixedly connected, the connection part between the connecting part and the connecting head part in the terminal body is not affected, damage or fracture is avoided, and the stability and reliability of electric connection of the connecting terminal are ensured; meanwhile, the split structure can facilitate replacement of the terminal main body after scrapping, so that the overall use cost of the connecting terminal is reduced;

2. the connecting structure of the connecting bolt arranged in the connecting head part ensures that the connecting bolt is not influenced by external environment, is not easy to rust and break, and can ensure the connecting stability;

3. the connecting head of the terminal main body and the connecting groove of the terminal connecting body form surface contact to transmit current, and a plurality of elastic contact fingers are arranged to ensure the stability of electric connection between the terminal main body and the terminal connecting body, so that the electric connection between the terminal main body and the terminal connecting body is irrelevant to a connecting bolt, the connecting bolt only needs to have a physical connection function, the stability of electric connection between the terminal main body and the terminal connecting body can be ensured, and the electric connection effect of the connecting terminal is furthest ensured not to be influenced by a split structure;

4. concave part structure in the connecting head, come with connecting bolt's head assorted, make connecting bolt's head can not influence the connection length in the connecting portion to reduce connecting bolt's not hard up possibility, and the bayonet socket that sets up on the step face of terminal main part is established mutually with the fixture block on the terminal connector and is blocked and form anti-rotation structure, prevents that the terminal main part from rotating relative to the terminal connector under the connected state, further guarantees connecting bolt's connection reliability.

Drawings

The technical scheme of the utility model is further described below with reference to the accompanying drawings:

fig. 1: a schematic diagram of a first embodiment of the present utility model;

fig. 2: FIG. 1 is a cross-sectional view;

fig. 3: a schematic diagram of a second embodiment of the present utility model;

fig. 4: FIG. 3 is a cross-sectional view;

fig. 5: a schematic diagram of a third embodiment of the present utility model;

fig. 6: FIG. 5 is a cross-sectional view;

fig. 7: a schematic diagram of a fourth embodiment of the present utility model;

fig. 8: FIG. 7 is a cross-sectional view;

fig. 9: schematic diagram of spring contact finger in the embodiment of the utility model.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present utility model, and structural, methodological, or functional modifications of the utility model from those skilled in the art are included within the scope of the utility model.

In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.

As shown in fig. 1 to 9, the present utility model discloses a split type connection terminal including a terminal body 1 for electrical connection, a terminal connector 2 for connecting a cable, and a connection bolt 3. (electrical connection in this scenario description refers to current carrying connection). The terminal body 1 comprises a connecting part 100 and a connecting head part 101 which are connected into a whole, the tail end of the terminal connecting body 2 is provided with a concave connecting groove 201, the outer wall of the connecting head part 101 is matched with the inner wall of the connecting groove 201 so as to form surface contact between the connecting head part 101 and the connecting groove 201, and a group of spring contact fingers are annularly arranged between the connecting head part 101 and the connecting groove 201 so as to ensure that the connecting head part 101 is electrically connected with the connecting groove 201; the axes of the connecting head 101 and the connecting groove 201 are coaxially provided with a threaded hole 4, and the connecting bolt 3 is arranged in the connecting head 101 and screwed with the threaded hole 4 to fasten the terminal main body 1 and the terminal connecting body 2 into a whole.

The utility model forms a separable and connectable split structure between the terminal main body 1 and the terminal connector 2 by the connection structure built in the connection bolt 3, so that the terminal connector 2 can be fixedly connected with a cable (not shown in the figure) in any way and is connected with the terminal main body 1 into a whole after the cable is fixedly connected, the connection position between the connection part 100 and the connection head 101 in the terminal main body 1 is not influenced by the connection mode of the cable, and damage or fracture is not generated, and the stability and reliability of the electric connection of the connection terminal are ensured; meanwhile, the split structure can facilitate replacement of the terminal main body 1 after scrapping, so that the overall use cost of the connecting terminal is reduced.

In addition, the built-in structure of the connecting bolt 3 in the scheme enables the connecting bolt 3 not to be affected by external environment, is not easy to rust and break, and can ensure the connection stability of the connecting bolt.

Specifically, the outer diameter of the connection head 101 is smaller than the outer diameter of the terminal body 1, so that a step surface 102 is formed therebetween, and the port thickness of the connection groove 201 is matched with the step surface 102, so that a smooth continuous outer wall is formed after the terminal body 1 and the terminal connector 2 are fastened together, thereby improving the consistency after connection between the terminal body 1 and the terminal connector 2.

Further, as shown in fig. 1, 3, 5 and 7, at least two concave bayonets 103 are disposed on the step surface 102, and a clamping block 202 matched with the bayonets 103 is disposed on a port of the connecting groove 201, and when the terminal main body 1 and the terminal connector 2 are fastened together, the clamping block 202 is clamped in the bayonets 103. The bayonet 103 and the clamping block 202 are clamped to form an anti-rotation structure, so that the terminal main body 1 is prevented from rotating relative to the terminal connector 2 in a connection state, connection reliability of the connecting bolt 3 is further guaranteed, and the connecting bolt 3 is prevented from loosening.

In this scheme, form the face contact between connection head 101 and the connection recess 201 and carry out the transmission of electric current, and set up a plurality of elasticity between the two and touch the stability that holds electric connection between guaranteeing terminal main part 1 and the terminal connector 2 for electric connection between terminal main part 1 and the terminal connector 2 is irrelevant with connecting bolt 3, connecting bolt 3 only need play the physical connection effect, can guarantee the stability of electric connection between terminal main part 1 and the terminal connector 2, and the electric connection effect of furthest guarantee connecting terminal is not influenced by split type structure.

Wherein, a set of spring contact finger includes two at least. Specifically, a first spring contact finger 5 is abutted between the front end of the connection head 101 and the bottom of the connection groove 201, the connection groove 201 or the front end of the connection head 101 has a receiving groove matched with the first spring contact finger 5 to receive the first spring contact finger 5, and the elasticity of the first spring contact finger 5 makes the first spring contact finger to respectively keep abutting with the connection head 101 and the connection groove 201 when the front end of the connection head 101 abuts against the bottom of the connection groove 201, so as to further ensure electrical connection between the connection head 101 and the connection groove 201. The first spring finger 5 may have different possible shapes, and in a preferred embodiment the first spring finger 5 is preferably ring-shaped with an endless screw to ensure an all-round contact.

Similarly, a second spring contact finger 6 is abutted between the outer wall of the connecting head 101 and the groove wall of the connecting groove 201. The outer wall of the connection head 101 or the groove wall of the connection groove 201 is provided with a receiving groove matched with the second spring contact finger 6 to define the position of the second spring contact finger 6, so that when the outer wall of the connection head 101 abuts against the groove wall of the connection groove 201, the second spring contact finger 6 abuts against the outer wall of the connection head 101 and the groove wall of the connection groove 201 respectively to ensure the electrical connection between the connection head 101 and the connection groove 201. In a preferred embodiment, the second spring finger 6 is ring-shaped, consisting of an endless screw. In other possible embodiments, the second spring finger 6 may have other possible shapes.

The inner wall of the connecting head 101 is formed with a concave portion 104 matching with the head of the connecting bolt 3, and the head of the connecting bolt 3 is embedded in the concave portion 104. The structure further optimizes the built-in effect of the connecting bolt 3, so that the head of the connecting bolt 3 is embedded in the concave part 104, the connection length in the connecting part 100 is not affected, and the possibility that the connecting bolt 3 is affected to rotate is reduced.

As shown in fig. 1-8, the connection portion 100 may have a variety of possible embodiments, such as a spring terminal connection structure or a slot terminal connection structure. Specifically, as shown in fig. 1-6, the connection portion 100 is formed by a set of elastic pieces 1001 uniformly distributed at intervals in the circumferential direction, the front ends of the elastic pieces 1001 are fixedly connected with the tail ends of the connection heads 101, the outer walls of the tail ends of the elastic pieces 1001 are concavely formed into an annular clamping groove 1002, and a clamping ring 7 is clamped in the annular clamping groove 1002 to limit the outer diameter deformation range of the elastic pieces 1001. The snap ring 7 may exert a pre-tightening effect on the spring 1001 to prevent the plugging force of the connection portion 100 after multiple plugging from becoming smaller, which affects the connection performance of the connection terminal.

As shown in fig. 8 and 9, in another possible embodiment, the connection portion 100 is a tube body fixedly connected to the tail end of the connection head 101, and a third contact finger 1003 abutting against the inner wall of the connection portion 100 is disposed in the connection portion 100. The third contact finger 1003 is configured to ensure the connection performance of the connection portion 100.

The front end of the terminal connector 2 is fixedly connected with the cable, and the terminal state 1 and the terminal connector 2 form a split structure, so that the fixing manner between the terminal connector 2 and the cable is not affected, and the terminal connector 2 and the cable can be fixedly connected in any suitable manner, and the fixing manner of the terminal connector 2 and the cable comprises, but is not limited to, welding, crimping or screwing.

In addition, a sealing ring 8 is sleeved on the outer wall of the terminal connector 2 to meet the sealing requirement.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. Split type connecting terminal, its characterized in that: the connecting structure comprises a terminal main body (1) used for electric connection, a terminal connecting body (2) used for connecting a cable and a connecting bolt (3), wherein the terminal main body (1) comprises a connecting part (100) and a connecting head part (101) which are connected into a whole, the tail end of the terminal connecting body (2) is provided with a concave connecting groove (201), the outer wall of the connecting head part (101) is matched with the inner wall of the connecting groove (201) to enable surface contact between the connecting head part (101) and the connecting groove (201), and a group of spring contact fingers are arranged between the connecting head part (101) and the connecting groove (201) in a surrounding mode to enable the connecting head part (101) to be electrically connected with the connecting groove (201); the connecting head (101) and the axle center of the connecting groove (201) are coaxially provided with threaded holes (4), and the connecting bolt (3) is arranged in the connecting head (101) and is screwed with the threaded holes (4) to fasten the terminal main body (1) and the terminal connecting body (2) into a whole.

2. The split connecting terminal according to claim 1, wherein: the outer diameter of the connecting head part (101) is smaller than that of the terminal main body (1), a step surface (102) is formed between the connecting head part and the terminal main body, the port thickness of the connecting groove (201) is matched with the step surface (102), and the terminal main body (1) and the terminal connecting body (2) are fastened into a whole to form a smooth continuous outer wall.

3. The split connecting terminal as claimed in claim 2, wherein: the terminal is characterized in that the step surface (102) is provided with at least two concave bayonets (103) which are oppositely arranged, a clamping block (202) matched with the bayonets (103) is arranged on a port of the connecting groove (201), and when the terminal main body (1) and the terminal connecting body (2) are fastened into a whole, the clamping block (202) is clamped in the bayonets (103).

4. The split connecting terminal according to claim 1, wherein: a first spring contact finger (5) is abutted between the front end part of the connecting head part (101) and the bottom of the connecting groove (201).

5. The split connecting terminal as claimed in claim 4, wherein: and a second spring contact finger (6) is abutted between the outer wall of the connecting head part (101) and the groove wall of the connecting groove (201).

6. The split connecting terminal as claimed in claim 5, wherein: the first spring contact finger (5) and the second spring contact finger (6) are annular and formed by endless spiral bodies.

7. The split connecting terminal according to claim 1, wherein: the inner wall of the connecting head part (101) is provided with a concave part (104) matched with the head part of the connecting bolt (3), and the head part of the connecting bolt (3) is embedded in the concave part (104).

8. The split connecting terminal according to claim 1, wherein: the connecting part (100) is in a cylinder shape formed by a group of elastic pieces (1001) which are uniformly distributed at intervals in the circumferential direction, the front ends of the elastic pieces (1001) are fixedly connected with the tail ends of the connecting heads (101), the outer walls of the tail ends of the elastic pieces (1001) are concavely formed into annular clamping grooves (1002), and a clamping ring (7) is clamped in each annular clamping groove (1002) to limit the outer diameter deformation range of the elastic piece (1001).

9. The split connecting terminal according to claim 1, wherein: the connecting part (100) is a pipe body fixedly connected with the tail end of the connecting head part (101), and a third contact finger (1003) which is in contact with the inner wall of the connecting part (100) is arranged in the connecting part.

10. The split connecting terminal according to claim 1, wherein: the front end of the terminal connecting body (2) is fixedly connected with the cable, and the two are fixedly connected in a welding mode, a crimping mode or a screwing mode.