Charging gun head fixing device and charging gun head

Abstract

The charging gun head fixing device comprises the charging gun head and a charging gun insertion port, four grooves are formed in the inner wall of the charging gun insertion port, locking devices are arranged in the grooves, each locking device comprises a limiting sliding block, a reset spring and a sliding rail, the sliding rails are installed on the side walls of the grooves, and the limiting sliding blocks are arranged in the grooves. The U-shaped limiting buckle is arranged in the moving direction of the charging gun head, when the limiting sliding block moves to the arc section, the central axis of the U-shaped limiting buckle is parallel to the moving direction of the charging gun head, at the moment, the charging gun head is inserted, a protrusion arranged on the charging gun head enters the U-shaped limiting buckle, and when the charging gun head continues to be inserted, the charging gun head drives the limiting sliding block to move; and at the moment, the limiting sliding block rotates with the circle center of the arc section as the axis, so that an included angle exists between the U-shaped limiting buckle and the moving direction of the charging gun head, and it is guaranteed that the protrusion is limited in the U-shaped limiting buckle.

Description

Technical Field

[0001] The present invention relates to the technical field of fastening a US standard AC charging gun head, in particular to a charging gun head fixing device and a charging gun head. Background Art

[0002] The charging guns currently used in electric vehicles only realize the charging function. Since a large current passes through the charging gun when charging, the protection measures for the charging gun interface are crucial. At present, the existing charging gun heads are easy to loosen and slide out, which not only affects normal charging but also poses a safety hazard. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a charging gun head fixing device and a charging gun head. The present invention has a simple structure and can lock the charging gun head when the charging gun head is inserted into the charging gun socket.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a charging gun head fixing device, comprising a charging gun head and a charging gun plug interface, the inner wall of the charging gun plug interface is provided with four grooves, a locking device is provided in the groove, the locking device comprises a limit slider, a reset spring and a slide rail, the slide rail is installed on the side wall of the groove, and is arranged along the movement direction of the charging gun head, the slide rail comprises an arc segment and a straight line segment arranged along the plug-in direction of the charging gun head, the limit slider is slidably connected to the slide rail, one end of the reset spring is connected to the limit slider, and the The other end of the reset spring is connected to the bottom surface of the groove, and a U-shaped limit buckle is installed on the side of the limit slider close to the central axis of the charging gun plug interface, and the charging gun head is provided with a protrusion that cooperates with the U-shaped limit buckle. When the limit slider moves to the arc section, the opening direction of the U-shaped limit buckle is parallel to the movement direction of the charging gun head. An installation groove is provided in the charging gun plug interface, and a buffer device is installed in the installation groove. The buffer device is in the form of a hydraulic damper, and a force-bearing pressure column that cooperates with the hydraulic damper is provided on the charging gun head.

[0005] Preferably, a limiting member is installed in the groove, the limiting member is connected to the side of the arc segment away from the straight line segment, and a limiting recess is formed at the connection between the limiting member and the arc segment, and when the limiting slider moves to the limiting recess position, the opening direction of the U-shaped limiting buckle is parallel to the movement direction of the charging gun head.

[0006] Preferably, the limiting member has a first inclined surface on one side close to the arc segment, and the limiting slider is provided with a second inclined surface matching the first inclined surface, and when the limiting slider moves to the limiting recessed position, the first inclined surface fits with the second inclined surface.

[0007] Preferably, a limiting guide rail is installed on the side wall of the groove, and the limiting guide rail is arranged opposite to the slide rail. When the limiting slider moves to the straight section, the side of the limiting slider away from the straight section contacts the limiting guide rail.

[0008] Preferably, the position-limiting guide rail and the straight section of the slide rail have the same length, and the bottom surface of the position-limiting guide rail is flush with the bottom surface of the straight section.

[0009] The present invention provides another technical solution: a charging gun head, comprising the charging gun head fixing device as described above.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] When the limit slider moves to the arc section, the central axis of the U-shaped limit buckle is parallel to the movement direction of the charging gun head. At this time, the charging gun head is inserted, and the protrusion arranged on the charging gun head enters the U-shaped limit buckle. When the charging gun head continues to be inserted, the charging gun head drives the limit slider to move and transitions from the arc section to the straight section. At this time, the limit slider rotates with the center of the arc section as the axis, so that an angle is formed between the U-shaped limit buckle and the movement direction of the charging gun head, ensuring that the protrusion is confined in the U-shaped limit buckle and will not move out of the U-shaped limit When charging is completed, the charging gun head moves outward and can drive the limit slider to move from the straight line segment to the arc segment. When it moves to the arc segment, the movement trajectory of the limit slider changes. At this time, the opening of the U-shaped limit buckle is parallel to the movement direction of the charging gun head, so that the protrusion slides out from the opening of the U-shaped limit buckle. By changing the movement trajectory of the limit slider, the opening direction of the U-shaped limit buckle is changed, thereby achieving locking. It is not only easy to operate, but also has a simple structure, convenient maintenance, and has a good locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the charging gun plug interface structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the charging gun head structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the structure of the locking device of the present invention.

[0015] Numbers in the figure: 1. Charging gun head; 2. Charging gun plug interface; 3. Groove; 4. Limit slider; 5. Reset spring; 6. Slide rail; 61. Arc segment; 62. Straight segment; 7. U-shaped limit buckle; 8. Protrusion; 9. Limit part; 10. Limit depression; 11. Limit guide rail; 12. Mounting groove; 13. Buffer device; 14. Force-bearing pressure column. DETAILED DESCRIPTION

[0016] See also Figure 1-3 , the present invention provides a technical solution:

[0017] Embodiment 1:

[0018] A charging gun head fixing device comprises a charging gun head 1 and a charging gun plug interface 2. Four grooves 3 are provided on the inner wall of the charging gun plug interface 2. A locking device is provided in the groove 3. The locking device comprises a limit slider 4, a return spring 5 and a slide rail 6. The slide rail 6 is installed on the side wall of the groove 3 and is arranged along the movement direction of the charging gun head 1. The slide rail 6 comprises an arc segment 61 and a straight line segment 62 arranged along the plugging direction of the charging gun head 1. The limit slider 4 is slidably connected to the slide rail 6. One end of the return spring 5 is connected to the limit slider 4. The other end of the return spring 5 is connected to the groove 3 bottom surface connection, a U-shaped limit buckle 7 is installed on one side of the limit slider 4 close to the central axis of the charging gun plug interface 2, and the charging gun head 1 is provided with a protrusion 8 that cooperates with the U-shaped limit buckle 7. When the limit slider 4 moves to the arc segment 61, the opening direction of the U-shaped limit buckle 7 is parallel to the movement direction of the charging gun head 1. A mounting groove 12 is provided in the charging gun plug interface 2, and a buffer device 13 is installed in the mounting groove 12. The buffer device 13 adopts the form of a hydraulic damper, and a force-bearing pressure column 14 that cooperates with the hydraulic damper is provided on the charging gun head 1;

[0019] A limiting member 9 is installed in the groove 3, and the limiting member 9 is connected to the side of the arc segment 61 away from the straight segment 62, and a limiting recess 10 is formed at the connection between the limiting member 9 and the arc segment 61. When the limiting slider 4 moves to the position of the limiting recess 10, the opening direction of the U-shaped limiting buckle 7 is parallel to the movement direction of the charging gun head 1. The limiting member 9 has a first inclined surface on the side close to the arc segment 61, and a second inclined surface matching the first inclined surface is provided on the limiting slider 4. When the limiting slider 4 moves to the position of the limiting recess 10, the first inclined surface fits the second inclined surface. A limiting guide rail 11 is installed on the side wall of the groove 3, and the limiting guide rail 11 is arranged opposite to the slide rail 6. When the limiting slider 4 moves to the straight segment 62, the side of the limiting slider 4 away from the straight segment 62 contacts the limiting guide rail 11, and the limiting guide rail 11 is the same length as the straight segment 62 of the slide rail 6, and the bottom surface of the limiting guide rail 11 is flush with the bottom surface of the straight segment 62.

[0020] The length direction of the groove 3 is parallel to the movement direction of the charging gun in the plug interface. One end of the groove 3 passes through the end of the charging gun plug interface 2, and the other end of the groove 3 is a closed structure. The U-shaped limit buckle 7 is an asymmetric structure, and the limit recess 10 is arc-shaped. When the limit slider 4 moves to the position of the limit recess 10, the opening direction of the U-shaped limit buckle 7 is parallel to the movement direction of the charging gun head 1. At this time, under the action of the vertical pulling force of the reset spring 5, the limit slider 4 can stay in the limit recess 10 more stably, thereby avoiding that after the charging gun head 1 is taken out, under the action of the reset spring 5, the limit slider 4 automatically moves from the arc segment 61 of the slide rail 6 to the straight segment 62, affecting the next use;

[0021] Under the pulling force of the return spring 5, a part of the vertical force can be dispersed on the second inclined surface and then transferred to the first inclined surface, so that a part of the vertical force is converted into a horizontal force, and the horizontal force is directed toward the limit member 9, thereby further preventing the limit slider 4 from moving from the arc segment 61 to the straight segment 62 under the action of the return spring 5;

[0022] When the limit slider 4 moves to the straight section 62, the side of the limit slider 4 away from the straight section 62 contacts the limit guide rail 11, so that the limit slider 4 can move linearly between the slide rail 6 and the limit guide rail 11, thereby preventing the limit slider 4 from swinging left and right during movement, which affects the use;

[0023] In order to improve the locking effect of the locking device, two grooves 3 are symmetrically arranged on the inner wall of the charging gun plug interface 2, and locking devices with the same structure are installed in the two grooves 3. Similarly, two protrusions 8 are symmetrically arranged on the charging gun head 1, which can lock both sides of the charging gun head 1, so that the locking of the charging gun head 1 is more stable;

[0024] During actual use, the buffer device 13 can alleviate the impact of the charging gun head 1, wherein the installation method of the buffer device 13 is the same as the installation method of the locking device. With the cooperation of the buffer device 13, it can not only facilitate the locking of the charging gun head 1, but also avoid the impact between the charging gun head 1 and the charging gun plug interface 2, thereby buffering the force during plugging.

[0025] Embodiment 2:

[0026] The charging gun head includes the above charging gun head fixing device.

[0027] Working principle: when the charging gun head 1 is inserted, the limit slider 4 is located in the limit recess 10, and is in a balanced position under the action of the reset spring 5. At this time, the opening direction of the U-shaped limit buckle 7 is parallel to the movement direction of the charging gun head 1. After the charging gun head 1 is inserted into the charging gun plug interface 2, the protrusion 8 on the charging gun head 1 is inserted into the U-shaped limit buckle 7. During the continued insertion process, the stable state of the limit slider 4 is broken, and the limit slider 4 moves under force. The charging gun head 1 drives the card slot of the limit slider 4 to move along the arc segment 61 of the slide rail 6. When it moves to the straight segment 62 of the slide rail 6, the limit slider 4 enters between the slide rail 6 and the limit guide rail 11, and continues to move along the straight segment 62 of the slide rail 6. At this time, there is an angle between the opening direction of the U-shaped limit buckle 7 and the movement direction of the charging gun head 1, thereby achieving locking;

[0028] After charging is completed, when the charging gun head 1 is pulled out, the protrusion 8 drives the limit slider 4 to move along the straight section 62 of the slide rail 6 toward the arc section 61. When it moves to the arc section 61, the movement direction of the slot changes, thereby driving the limit slider 4 to change the movement direction. When the limit slider 4 is located in the limiting recess 10, the opening direction of the U-shaped limiting buckle 7 is parallel to the moving direction of the charging gun head 1. At this time, the charging gun head 1 continues to be pulled out, and the protrusion 8 is pulled out from the U-shaped limiting buckle 7, so that the charging gun head 1 is separated from the charging gun plug interface 2, and the limit slider 4 stays in the limiting recess 10 and is in a stable state, waiting for the next charging.

Claims

1. A charging gun head fixing device, comprising a charging gun head (1) and a charging gun plug interface (2), characterized in that: The inner wall of the charging gun plug interface (2) is provided with four grooves (3), and a locking device is provided in the groove (3). The locking device comprises a limit slider (4), a return spring (5) and a slide rail (6). The slide rail (6) is installed on the side wall of the groove (3) and is arranged along the movement direction of the charging gun head (1). The slide rail (6) comprises an arc segment (61) and a straight segment (62) arranged along the plugging direction of the charging gun head (1). The limit slider (4) is slidably connected to the slide rail (6), one end of the return spring (5) is connected to the limit slider (4), and the other end of the return spring (5) is connected to the bottom surface of the groove (3). A U-shaped limit buckle (7) is installed on one side of the positioning slider (4) close to the central axis of the charging gun plug interface (2), and the charging gun head (1) is provided with a protrusion (8) that cooperates with the U-shaped limit buckle (7). When the limit slider (4) moves to the arc section (61), the opening direction of the U-shaped limit buckle (7) is parallel to the movement direction of the charging gun head (1). A mounting groove (12) is provided in the charging gun plug interface (2), and a buffer device (13) is installed in the mounting groove (12). The buffer device (13) is in the form of a hydraulic damper, and the charging gun head (1) is provided with a force-bearing pressure column (14) that cooperates with the hydraulic damper.

2. The charging gun head fixing device according to claim 1, characterized in that: A limiting member (9) is installed in the groove (3), and the limiting member (9) is connected to a side of the arc segment (61) away from the straight segment (62), and a limiting recess (10) is formed at the connection between the limiting member (9) and the arc segment (61). When the limiting slider (4) moves to the position of the limiting recess (10), the opening direction of the U-shaped limiting buckle (7) is parallel to the movement direction of the charging gun head (1).

3. The charging gun head fixing device according to claim 2, characterized in that: The limiting member (9) has a first inclined surface on one side close to the arc segment (61), and the limiting slider (4) is provided with a second inclined surface matching the first inclined surface. When the limiting slider (4) moves to the position of the limiting recess (10), the first inclined surface fits with the second inclined surface.

4. The charging gun head fixing device according to claim 1, characterized in that: A limiting guide rail (11) is installed on the side wall of the groove (3), and the limiting guide rail (11) is arranged opposite to the slide rail (6). When the limiting slider (4) moves to the straight section (62), the side of the limiting slider (4) away from the straight section (62) contacts the limiting guide rail (11).

5. The charging gun head fixing device according to claim 3, characterized in that: The position-limiting guide rail (11) and the straight section (62) of the slide rail (6) have the same length, and the bottom surface of the position-limiting guide rail (11) is flush with the bottom surface of the straight section (62).

6. Charging gun head, characterized by: It comprises a charging gun head fixing device as described in any one of claims 1 to 5.

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