A charging gun with replaceable power terminal and gun head panel

Abstract

The application discloses a charging gun with replaceable power terminals and a gun head panel, which comprises a gun body shell, a gun head and a power terminal assembly arranged in the gun head and comprising replaceable power terminals; the gun head comprises a gun head seat and a gun head panel arranged separately, the former is fixed with the gun body shell and comprises a front shell plate through which the power terminals pass; the gun head panel is detachably fixed on the front part of the front plate shell by a plurality of gun head panel fixing screws, and a power terminal pressing sleeve which is sleeved on the power terminal is formed on the gun head panel; the power terminal assembly further comprises a terminal seat and a terminal seat clamp; the power terminal is a split slot type terminal which is detachably fixed on the front end of the terminal seat by a terminal fixing screw in the axial direction, the rear end of the terminal seat is welded with a cable, and the terminal seat clamp is fixed on the rear part of the front plate shell and clamps and fixes the terminal seat from the axial and circumferential directions. The charging gun can not only replace the power terminals, but also replace the gun head panel, the axial size of the gun head is smaller, the structure is more compact, and the connection reliability of the cable is better.

Description

TECHNICAL FIELD

[0001] The application is a charging gun with replaceable power terminals and gun head panels. BACKGROUND

[0002] With the popularization of new energy vehicles, the use of high-power DC charging guns is also becoming more and more popular. As we all know, during the use of the charging gun for fast charging, the (power) terminals of the charging gun need to withstand a large current, and if they are frequently used or operated in harsh conditions, the contact resistance of these (power) terminals will increase and there will be a situation of melting and damage. For the traditional design of the charging gun, the (power) terminals at the end are fixed inside the charging gun and cannot be detached, and once the (power) terminals are damaged, even if other parts are not affected, it means that the entire charging gun is scrapped and must be replaced, causing a lot of waste.

[0003] Therefore, a series of charging guns on the market currently all begin to adopt the design of replaceable (power) terminals, for example, the invention patent with the authorized announcement number CN213124831U discloses a "charging gun with replaceable terminals", which positions the replaceable terminals (i.e. power terminals) axially pluggable in the gun head interior through a series of terminal components such as a front plug shell sleeve and a rear compression plug sleeve. When such replaceable terminals need to be replaced due to damage, only the screws of the plug sleeve shell need to be removed, and the plug shell sleeve and its sealing pad can be removed from the gun head, so that the replaceable terminals can be pulled out from the inside compression plug sleeve for replacement, and the process is relatively efficient.

[0004] However, the above-mentioned "charging gun with replaceable terminals" still exposes the following defects in design:

[0005] 1. Since the gun head of the charging gun is frequently in contact and pluggable with the socket, the wear is large, and in addition, the cable of the current high-power DC gun is very heavy, which is prone to falling and causing damage to the gun head (panel) during use, so the gun head is also a vulnerable part and needs to be replaced in time.

[0006] However, in the design of the above-mentioned existing charging gun, although the gun head is designed in a split body with the gun body shell, it is not easy to disassemble. This is because, in addition to being fixed with the gun body shell, the gun head is also fixed with a plug shell sleeve for pressing the replaceable terminals, as well as a plurality of card plate assemblies such as a card plate and a cable pressing plate associated with the cable inside, through screws. Therefore, in order to disassemble the gun head, all the above-mentioned parts attached to the gun head must be disassembled, which is very tedious and unrealistic in actual operation. Especially for non-professionals, if the card plate and the cable pressing plate are disassembled by mistake, the rear cable is easily damaged, which causes serious damage to the charging gun.

[0007] Therefore, the existing above-mentioned "charge gun with replaceable terminal" cannot replace the gun head alone due to the complex assembly structure design of the gun head and the internal terminal assembly. Once the gun head is damaged and needs to be replaced, the entire charge gun is often replaced.

[0008] 2. In the existing above-mentioned "charge gun with replaceable terminal", the front end of the crimping bushing is connected to the replaceable terminal, and the rear end is in contact with the cable. The cable is fixed by axially pressing the cable to the end of the crimping bushing with the help of the cable pressing plate and the cable sealing gasket. However, during the process of plugging and unplugging the replaceable terminal, the crimping bushing and the clamping plate are easily loosened and moved axially, causing the end of the crimping bushing to lose contact with the cable, affecting the performance of the charge gun.

[0009] In addition, in the assembly design of the replaceable terminal and the clamping plate assembly, the front end of the replaceable terminal is connected to the crimping bushing. In order to increase the contact area of the conductors, the rear section of the replaceable terminal and the front section of the crimping bushing are often made into long extensions. Similarly, the rear section of the crimping bushing also needs to be made into a long extension in order to increase the contact area of the conductors with the cable. This results in a significant increase in the axial size of the gun head of the charge gun, making it impossible to achieve a compact structure and increasing the manufacturing cost.

[0010] Therefore, the clamping plate assembly at the rear of the replaceable terminal in the existing above-mentioned "charge gun with replaceable terminal" has many parts, a complex structure, and a complicated assembly process. It also has low positioning stability and reliability for the cable, and the axial size of the gun head is large, making the structure not compact.

[0011] In addition, the existing above-mentioned "charge gun with replaceable terminal" also has the problem of placing the temperature sensor inside the end of the clamping plate. This position is not conducive to the reliable installation and positioning of the temperature sensor, and the temperature sensor is easily damaged by the extrusion of the crimping bushing and the cable. In addition, since the temperature sensor is far away from the front replaceable terminal, it cannot monitor the temperature at the terminal during the operation of the charge gun, greatly reducing the working reliability of the temperature sensor. SUMMARY

[0012] The present application aims to overcome the above problems in the prior art and provide a charge gun with replaceable power terminal and gun head panel. The charge gun has replaceable power terminal and gun head panel, and the axial size of the gun head is smaller, the structure is more compact, the internal power terminal assembly is easier to assemble, and the connection stability and reliability of the cable are better.

[0013] The technical scheme of the present application is: a charging gun with replaceable power terminal and gun head panel, comprising a gun head connected to the front part of the gun body shell and a power terminal assembly arranged in the gun head, the power terminal assembly comprising a replaceable power terminal; characterized in that the gun head comprises a gun head seat and a gun head panel arranged separately, the gun head seat is fixed to the front part of the gun body shell, the gun head seat comprises a front plate shell, the front plate shell is provided with a power terminal extension hole for the power terminal to extend out, and the gun head panel is detachably fixed to the front part of the front plate shell through a plurality of gun head panel fixing screws, the gun head panel is formed with a power terminal pressing sleeve on the gun head panel, the power terminal pressing sleeve is sleeved on the power terminal; the power terminal assembly further comprises a terminal seat and a terminal seat clamp, the power terminal is a split slot type terminal, which is detachably fixed to the front end of the terminal seat through an axial terminal fixing screw, and the rear end of the terminal seat is welded and fixed with a cable, the terminal seat clamp is fixed to the rear part of the front plate shell, and is provided with a clamping groove for embedding and clamping the terminal seat, and the clamping groove is provided with anti-rotation stop structure for cooperation between the inside of the clamping groove and the terminal seat, and is further provided with matched axial limiting structure to axially fix the terminal seat.

[0014] Further, the specific assembly structure scheme of the terminal seat and the terminal seat clamp in the present application is as follows: comprising a cylindrical seat body, and the terminal seat clamp is provided with a C-shaped clamping groove for embedding and clamping the cylindrical seat body; the cylindrical seat body is provided with an annular groove, and the inner wall of the C-shaped clamping groove of the terminal seat clamp is provided with an arc-shaped limiting protruding rib for clamping into the annular groove to axially fix the terminal seat; at the same time, a tangential rotation stop plane is arranged on the inner circumference of the annular groove and the outer circumference of the arc-shaped limiting protruding rib for cooperation to limit the circumferential rotation of the terminal seat relative to the C-shaped clamping groove, or a tangential rotation stop plane is arranged between the outer circumference of the cylindrical seat body outside the annular groove and the inner wall of the C-shaped clamping groove for cooperation to limit the circumferential rotation of the terminal seat relative to the C-shaped clamping groove; and the cylindrical seat body is provided with a radial temperature sensor positioning hole, and the radial temperature sensor positioning hole is used for inserting and fixing a temperature sensor.

[0015] More preferably, the cylindrical seat body in the present application is divided into a front seat body and a rear seat body by the annular groove, and the tangential rotation stop plane for cooperation between the outer circumference of the front seat body rear part and the inner wall of the C-shaped clamping groove is arranged to limit the circumferential rotation of the terminal seat relative to the C-shaped clamping groove, and the radial temperature sensor positioning hole is arranged on the rear seat body to insert and fix the temperature sensor.

[0016] It should be pointed out that in the specific assembly structure scheme of the terminal seat and the terminal seat clamp, the C-shaped clamping groove of the terminal seat clamp internally adopts two sets of cooperation structures to realize the axial positioning and circumferential positioning of the terminal seat, which can greatly ensure the positioning stability of the terminal seat clamp to the terminal seat.

[0017] Of course, in addition to the above-mentioned terminal seat and terminal seat clip assembly structure scheme, the following scheme can also be used in the present application: the terminal seat comprises a cylindrical seat body, and the terminal seat clip is provided with a C-shaped clamping groove for embedding and clamping the cylindrical seat body; at least one radial groove is provided on the outer periphery of the cylindrical seat body (when there are more than two radial grooves, they can be distributed in any direction along the radial direction or the axial direction of the outer periphery of the cylindrical seat body, for example, arranged in alignment or staggered, and the present application has no limitation thereon), and a radial key is provided on the inner wall of the C-shaped clamping groove of the terminal seat clip for matching the radial groove, which is used to fix the terminal seat in the axial and circumferential directions; and a radial temperature sensor positioning hole is provided on the cylindrical seat body, and a temperature sensor is inserted into the radial temperature sensor positioning hole for fixing the temperature sensor.

[0018] In specific operation, the temperature sensor in the above-mentioned scheme can use an existing PT1000 temperature sensor.

[0019] Based on the above-mentioned two terminal seat and terminal seat clip assembly structure schemes, the present application has the following further improved schemes:

[0020] The power terminal is fixed on the front end face of the cylindrical seat body by the terminal fixing screw, a circular insertion slot is provided on the front end face for inserting the power terminal, and a terminal sealing ring is sleeved on the power terminal to seal the circular insertion slot. The introduction of the circular insertion slot and the terminal sealing ring can greatly improve the packaging and sealing performance of the connection part between the rear part of the power terminal and the terminal seat, preventing pollution when the gun head panel is disassembled.

[0021] An axially distributed terminal welding piece is formed at the end of the cylindrical seat body, which is located between the two cable copper cores of the cable head and is welded and fixed with the two cable copper cores. This structure can greatly improve the connection stability of the terminal seat and the cable.

[0022] An extension pipe is formed at the rear part of the front plate shell corresponding to the power terminal extension hole, and a front part of the C-shaped clamping groove is closed to form a limiting ring, which is used to be sleeved on the outer periphery of the extension pipe to limit the radial movement of the terminal seat clip. This structure ensures that the positioning of the terminal seat clip is more stable and reliable.

[0023] Further, the two power terminals in the present application are arranged in parallel, the two terminal seats are arranged corresponding to the power terminals, and the terminal seat clip is provided with left and right symmetrical clamping grooves; a grounding terminal and a plurality of signal terminals are fixed in the gun head seat and extend out of the front plate shell, the grounding terminal and the signal terminals are located above the two power terminals, and the gun head panel is provided with openings for the grounding terminal and the signal terminals to extend out.

[0024] Further, the gun head seat in the application further comprises a peripheral shell formed on the front plate shell and hidden in the gun body shell, the peripheral shell is provided with a plurality of gun head seat positioning buckles, and the gun body shell is internally provided with a plurality of gun head seat positioning clamping grooves matched with the gun head seat positioning buckles; meanwhile, the gun head seat is fixed to the gun body shell through a plurality of gun head seat fixing screws, and the gun head seat is also locked and fixed on the gun body shell together with the gun head face plate through a plurality of gun head fixing screws penetrating through the gun head face plate.

[0025] Further, the gun body shell is provided with an opening above the front plate shell, and a charging socket connecting clamping hook is fixed in the gun body shell and extends outward through the opening, and the gun head face plate is provided with a hole through which the charging socket connecting clamping hook extends in advance. When the charging gun of the application is connected to the corresponding charging socket, the charging socket connecting clamping hook can be matched and fixed with the clamping groove provided on the charging socket.

[0026] When the charging gun of the application is used, if only the gun head face plate is damaged, the gun head face plate can be disassembled and replaced from the gun head seat by only disassembling the gun head face plate fixing screw (if the gun head fixing screw for locking the gun head face plate and the gun head seat to the gun body shell is also provided, the gun head fixing screw also needs to be disassembled), at this time, the gun head seat is still fixed on the gun body shell, and the front plate shell on the gun head seat isolates the power terminal assembly inside from the outside, avoiding the pollution of the power terminal assembly.

[0027] When the charging gun of the application needs to replace the power terminal, the gun head face plate is first disassembled as described above, and then the axial terminal fixing screw for fixing the power terminal is disassembled, so that the power terminal is separated from the terminal seat and pulled out from the power terminal extension hole on the front plate shell for replacement, the process is also very convenient.

[0028] The advantages of the technical scheme of the application are as follows:

[0029] 1、The gun head in the application is designed into a gun head face plate and a gun head seat, when the gun head face plate is damaged, the gun head face plate can be disassembled alone very conveniently, without interfering with the power terminal assembly installed in the gun head seat, which can greatly simplify the disassembly work and avoid damaging the cable. Since the gun head seat is still fixed on the gun body shell when the gun head face plate is disassembled, and the power terminal assembly inside is isolated from the outside by the front plate shell on the gun head seat, the power terminal assembly can also be prevented from being polluted.

[0030] 2、The power terminal of the application adopts a split slot type terminal, which is fixed to the terminal seat by an axial terminal fixing screw, instead of being connected in a plug-in manner as in the conventional technology, so that the terminal seat and its end cable are not pulled during the process of removing the power terminal, and the connection reliability of the terminal seat and the cable can be effectively ensured. Moreover, the axial and circumferential positions of the terminal seat are reliably positioned by the specially designed terminal seat clamp, and the end of the terminal seat is firmly welded to the cable, so that the connection stability and reliability of the terminal seat tail and the cable are further ensured, thereby ensuring the use performance of the charging gun.

[0031] 3、In the application, the power terminal and the terminal seat, and the terminal seat and the cable are not connected in a plug-in manner to realize conductor contact, so that an extension section as in the prior art does not need to be attached to the power terminal and the terminal seat, thereby reducing the axial length of them, and further reducing the axial size of the whole gun head, making the gun head structure more compact, thereby reducing material application and manufacturing cost.

[0032] 4、The power terminal assembly in the application is clamped and fixed by the specially designed terminal seat clamp, and can be reliably positioned in the axial and circumferential directions, respectively. When produced and assembled, the terminal seat is only needed to be clamped into the clamping groove of the terminal seat clamp to complete the fixation, without the aid of screws and other external positioning members, which makes the power terminal assembly very easy to assemble as a whole, and can greatly improve the production efficiency.

[0033] 5、The application sets a special radial temperature sensor positioning hole on the cylindrical seat body of the terminal seat to insert and fix the temperature sensor, which greatly facilitates the installation and positioning of the temperature sensor, and can ensure that the temperature sensor is not easily damaged. Moreover, since the temperature sensor is closer to the front power terminal, it can also better monitor the temperature at the power terminal during the operation of the charging gun, so that the working reliability of the temperature sensor is greatly improved.

[0034] The purposes, advantages and characteristics of the application will be illustrated and explained by the following non-limiting description of the preferred embodiments, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a charging gun disassembled state perspective structure schematic diagram (remove the gun head panel and power terminal state);

[0036] Figure 2 is a main cross-sectional view of the charging gun of the application;

[0037] Figure 3 is an exploded structure schematic diagram of the gun head seat and the power terminal assembly inside it in the application;

[0038] Figure 4 is a perspective view of the temperature sensor and power terminal removed from the terminal seat in the present application;

[0039] Figure 5 is a perspective view of the single independent body structure of the terminal seat in the present application;

[0040] Figure 6 is a perspective view of the single independent body structure of the terminal seat clamp in the present application;

[0041] Figure 7 is a perspective view of the assembly of the terminal seat and the terminal seat clamp in the present application.

[0042] 1, gun body shell; 2, power terminal; 3, gun head seat; 301, front plate shell; 301a, power terminal extension hole; 301b, extension pipe; 302, outer peripheral shell; 302a, gun head seat positioning buckle; 4, gun head panel; 401, power terminal pressing sleeve; 5, gun head panel fixing screw; 6, terminal seat; 601, cylindrical seat body; 6011, front seat body; 6012, rear seat body; 601a, annular groove; 601b, radial temperature sensor positioning hole; 601c, circular insertion slot; 602, terminal welding piece; 7, terminal seat clamp; 701, C-shaped clamp groove; 701a, arc-shaped limiting protrusion; 702, limiting ring; 8, terminal fixing screw; 9, cable; 10, temperature sensor; 11, terminal sealing ring; 12, cable copper core; 13, gun head seat fixing screw; 14, gun head fixing screw; 15, charging socket connecting clasp; 16, ground terminal; 17, signal terminal. DETAILED DESCRIPTION

[0043] Embodiment: in combination Figures 1-7 The charging gun provided by the present application with replaceable power terminals and gun head panels is described as follows:

[0044] As the prior art, it has a gun body shell 1, a gun head connected to the front of the gun body shell 1, and a power terminal assembly arranged in the gun head, and the power terminal assembly includes two parallel arranged replaceable power terminals 2. In combination Figures 1-3As shown, one core improvement of the present application lies in that the gun head adopts split setting gun head seat 3 and gun head panel 4, the gun head seat 3 is fixed in the front of the gun body shell 1, and the gun head seat 3 is composed of front plate shell 301 and outer peripheral shell 302 formed on it and hidden in the gun body shell 1. The lower part of the front plate shell 301 is provided with power terminal extension holes 301a for two power terminals 2 to extend respectively, and the rear part of the front plate shell 301 is formed with extension pipes 301b corresponding to the two power terminal extension holes 301a. The gun head panel 4 is detachably fixed in the front of the front plate shell 301 through three gun head panel fixing screws 5, and the gun head panel 4 is formed with two power terminal pressing sleeves 401 corresponding to the two power terminals 2. The two power terminal pressing sleeves 401 are used to protect the power terminals 2, and the inner edge of the front end is used to abut against the end of the power terminal 2 for better axial positioning of the power terminal 2. See Figure 1 and Figure 2 as shown.

[0045] The outer peripheral shell 302 of the gun head seat 3 is provided with upper and lower gun head seat positioning buckles 302a, as shown in Figure 3 , and the inside of the gun body shell 1 is provided with gun head seat positioning clamping grooves (omitted in the figure) matched with the gun head seat positioning buckles 302a. At the same time, in combination with Figure 1 and Figure 2 , the gun head seat 3 is fixed to the gun body shell 1 through two gun head seat fixing screws 13. And the gun head seat 3 is also locked and fixed on the gun body shell 1 together with the gun head panel 4 through two gun head fixing screws 14 penetrating through the gun head panel 4, as shown in Figure 1 .

[0046] In combination with Figures 1-3 , another core improvement of the present application lies in that the power terminal assembly includes two terminal seats 6 and a terminal seat clamp 7 corresponding to the two power terminals 2 in addition to the above-mentioned two parallel replaceable power terminals 2. The power terminal 2 is a split slot type terminal, which is detachably fixed at the front end of the terminal seat 6 through the axial terminal fixing screw 8, and the rear end of the terminal seat 6 is welded and fixed with the cable 9. The terminal seat clamp 7 is screwed on the rear part of the front plate shell 301, which is provided with two symmetrical clamping grooves for embedding and clamping the terminal seat 6 on both sides. The inside of each clamping groove is provided with anti-rotation structure matched with the terminal seat 6, and the matched axial limiting structure is also provided to axially fix the terminal seat 6.

[0047] Further in combination with Figures 4-7As shown, each terminal seat 6 is composed of a cylindrical seat body 601 and terminal welding pieces 602 shaped at the end of the cylindrical seat body 601 and distributed axially. The terminal seat clamp 7 is provided with a C-shaped clamping groove 701 for embedding and clamping the cylindrical seat body 601; the cylindrical seat body 601 is provided with an annular groove 601a, and the inner wall of the C-shaped clamping groove 701 of the terminal seat clamp 7 is provided with an arc-shaped limiting protruding rib 701a for clamping into the annular groove 601a to axially fix the terminal seat 6; the cylindrical seat body 601 is divided into a front seat body 6011 and a rear seat body 6012 by the annular groove 601a, and a tangential rotation-stopping plane A is arranged between the outer periphery of the rear part of the front seat body 6011 and the inner wall of the C-shaped clamping groove 701 to limit the circumferential rotation of the terminal seat 6 relative to the C-shaped clamping groove 701 (specifically combined with Figure 5 and Figure 6 As shown, the top and bottom of the rear part of the front seat body 6011 in the embodiment are both provided with tangential rotation-stopping planes A, and the inner wall of the C-shaped clamping groove 701 is also correspondingly provided with upper and lower tangential rotation-stopping planes A that cooperate with the tangential rotation-stopping planes A of the top and bottom of the rear part of the front seat body 6011. The rear seat body 6012 is provided with a radial temperature sensor positioning hole 601b for inserting and fixing the temperature sensor 10, and the temperature sensor 10 in the embodiment is a PT1000 temperature sensor.

[0048] Specifically combined with Figures 2-4 As shown, in the embodiment, each power terminal 2 is inserted through the extension pipe 301b from the corresponding power terminal extension hole 301a of the front panel shell 301 and is finally fixed on the front end face of the cylindrical seat body 601 of the corresponding terminal seat 6 by the axial terminal fixing screw 8, the front end face is provided with a circular insertion slot 601c for inserting the power terminal 2, and the power terminal 2 is sleeved with a terminal sealing ring 11 that seals the circular insertion slot 601c. The introduction of the circular insertion slot 601c and the terminal sealing ring 11 can greatly improve the packaging and sealing performance of the connection part between the rear part of the power terminal 2 and the terminal seat 6, preventing pollution when the gun head panel 4 is disassembled.

[0049] Specifically combined with Figures 2-3 As shown, in the embodiment, the terminal welding pieces 602 shaped at the end of the cylindrical seat body 601 are inserted between the two cable copper cores 12 at the head of the cable 9 and are welded and fixed with the two cable copper cores 12.

[0050] Specifically combined with Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the front part of each of the two C-shaped clamping grooves 701 on the terminal holder clamp 7 in the embodiment is closed to form a limiting ring 702, and the two limiting rings 702 are respectively sleeved on the outer periphery of the two extension pipes 301b formed at the rear part of the front plate shell 301 to limit the radial movement of the terminal holder clamp 7, thereby ensuring that the positioning of the terminal holder clamp 7 is more stable and reliable.

[0051] Further combined Figure 1 As shown, in addition to the two replaceable power terminals 2 mentioned above, the gun head seat 3 in the embodiment is further fixed with a grounding terminal 16 and two signal terminals 17 which pass through the front plate shell 301, and the grounding terminal 16 and the two signal terminals 17 are located above the two power terminals 2, and the gun head panel 4 is provided with openings for the grounding terminal 16 and the two signal terminals 17 to extend out.

[0052] The front part of the gun body shell 1 is provided with an opening above the front plate shell 301, and a charging socket connecting clamping hook 15 is fixed inside the gun body shell 1 and extends outward through the opening, and the gun head panel 4 is provided with an opening (not labeled in the figure) for the charging socket connecting clamping hook 15 to extend out in advance. When the charging gun of the application is connected to a corresponding charging socket, the charging socket connecting clamping hook 15 can be fixed with the clamping groove provided on the charging socket.

[0053] When the charging gun of the embodiment is used, if only the gun head panel 4 is damaged, the gun head panel 4 can be disassembled and replaced from the gun head seat 3 by only removing the three gun head panel fixing screws 5 and the two gun head fixing screws 14, at this time the gun head seat 3 is still fixed on the gun body shell 1, and the front plate shell 301 on it isolates the internal power terminal assembly from the outside, avoiding the pollution of the power terminal assembly.

[0054] When the charging gun of the embodiment needs to replace the power terminal 2, the gun head panel 4 is first disassembled as described above, and then the terminal fixing screw 8 for fixing the power terminal 2 is removed, so that the power terminal 2 can be separated from the terminal seat 6 and pulled out from the power terminal extension hole 301a on the front plate shell 301 for replacement, and the process is also very convenient.

[0055] The advantages of the above embodiment are:

[0056] 1. The gun head is designed to be split into a gun head panel 4 and a gun head seat 3, when the gun head panel 4 is damaged, the gun head panel 4 can be disassembled alone very conveniently, without interfering with the power terminal assembly installed in the gun head seat 3, which can greatly simplify the disassembly work and avoid damaging the cable 9. And since the gun head seat 3 is still fixed on the gun body shell 1 when the gun head panel 4 is disassembled, and the front plate shell 301 on it isolates the internal power terminal assembly from the outside, it can also avoid the pollution of the power terminal assembly.

[0057] 2. The power terminal 2 adopts a slotted terminal, which is fixed to the terminal block 6 by an axial terminal fixing screw 8, instead of the plug-and-play connection as in conventional technology. Therefore, the removal of the power terminal 2 will not pull on the terminal block 6 and its end cable 9, effectively ensuring the reliability of the connection between the terminal block 6 and the cable 9. Furthermore, since this embodiment also uses a specially designed terminal block clamp 7 to reliably position the terminal block 6 in both the axial and circumferential directions, coupled with the strong welding structure between the end of the terminal block 6 and the cable 9, the stability and reliability of the connection between the tail of the terminal block 6 and the cable 9 can be further ensured, thereby guaranteeing the performance of the charging gun.

[0058] 3. Since the power terminal 2 and terminal block 6, as well as the terminal block 6 and cable 9, do not use a plug-in method to achieve conductor contact, there is no need to add extensions to the power terminal 2 and terminal block 6 as in the prior art. This reduces their axial length, thereby reducing the axial dimension of the entire gun head, making the gun head structure more compact, thus reducing material usage and manufacturing costs.

[0059] 4. The power terminal assembly clamps the terminal block 6 with a specially designed terminal block clamp 7, which can reliably position the terminal block 6 in both the axial and circumferential directions. During production and assembly, the terminal block 6 can be fixed simply by inserting it into the clamping groove of the terminal block clamp 7, without the need for screws or other external positioning parts. This makes the power terminal assembly very easy to assemble and can greatly improve production efficiency.

[0060] 5. A dedicated radial temperature sensor positioning hole 601b is provided on the cylindrical base 601 of the terminal block 6 to insert and fix the temperature sensor 10. This greatly facilitates the installation and positioning of the temperature sensor 10 and ensures that the temperature sensor 10 is not easily damaged. Furthermore, since the temperature sensor 10 is closer to the front power terminal 2, it can better monitor the temperature at the power terminal 2 when the charging gun is working, thus greatly improving the reliability of the temperature sensor 10.

[0061] Of course, the above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. In addition to the above embodiments, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A charging gun with replaceable power terminal and gun head panel, comprising a gun head connected at the front of a gun body housing (1) and a power terminal assembly arranged in the gun head, the power terminal assembly comprising a replaceable power terminal (2); characterized in that, The gun head comprises a gun head seat (3) and a gun head panel (4), the gun head seat (3) is fixed at the front of the gun body shell (1), the gun head seat (3) comprises a front plate shell (301), the front plate shell (301) is provided with a power terminal extension hole (301a) for the power terminal (2) to extend out, the gun head panel (4) is detachably fixed at the front of the front plate shell (301) through a plurality of gun head panel fixing screws (5), the gun head panel (4) is formed with a power terminal pressing sleeve (401) sleeved on the power terminal (2); the power terminal assembly further comprises a terminal seat (6) and a terminal seat clamp (7), the power terminal (2) is a split slot type terminal, which is detachably fixed at the front end of the terminal seat (6) through the axial terminal fixing screw (8), and the rear end of the terminal seat (6) is welded and fixed with the cable (9), the terminal seat clamp (7) is fixed at the rear of the front plate shell (301), and the terminal seat clamp (7) is provided with a clamping groove for embedding and clamping the terminal seat (6), and the clamping groove is provided with a rotation stopping structure for resisting relative rotation between the clamping groove and the terminal seat (6), and an axial limiting structure is further provided for axially fixing the terminal seat (6); The terminal seat (6) comprises a cylindrical seat body (601), and the terminal seat clamp (7) is provided with a C-shaped clamping groove (701) for embedding and clamping the cylindrical seat body (601); the cylindrical seat body (601) is provided with an annular groove (601a), and the inner wall of the C-shaped clamping groove (701) of the terminal seat clamp (7) is provided with an arc limiting protruding rib (701a) for clamping into the annular groove (601a) to axially fix the terminal seat (6); at the same time, a tangential rotation stopping plane (A) is provided on the inner circumference of the annular groove (601a) and the outer circumference of the arc limiting protruding rib (701a) for limiting the circumferential rotation of the terminal seat (6) relative to the C-shaped clamping groove (701), or a tangential rotation stopping plane (A) is provided between the outer circumference of the cylindrical seat body (601) outside the annular groove (601a) and the inner wall of the C-shaped clamping groove (701) for limiting the circumferential rotation of the terminal seat (6) relative to the C-shaped clamping groove (701); and the cylindrical seat body (601) is provided with a radial temperature sensor positioning hole (601b) for inserting and fixing a temperature sensor (10); The power terminal (2) is parallel arranged two, the terminal seat (6) is also two, corresponding to the power terminal (2) is arranged, and the terminal seat clamp (7) is provided with left and right symmetrical clamping grooves; the gun head seat (3) is further fixed with a grounding terminal (16) and a plurality of signal terminals (17) penetrating out of the front plate shell (301), the grounding terminal (16) and the signal terminals (17) are located above the two power terminals (2), and the gun head panel (4) is provided with an opening for the grounding terminal (16) and the signal terminals (17) to extend out.

2. The charging gun with replaceable power terminal and gun head panel according to claim 1, characterized in that, The cylindrical seat body (601) is divided into a front seat body (6011) and a rear seat body (6012) by the annular groove (601a), the front seat body (6011) is provided with a tangential rotation-stopping plane (A) between the rear outer periphery and the inner wall of the C-shaped clamping groove (701) to limit the circumferential rotation of the terminal seat (6) relative to the C-shaped clamping groove (701), and the radial temperature sensor positioning hole (601b) is arranged on the rear seat body (6012) to insert and fix the temperature sensor (10).

3. The charging gun with replaceable power terminal and gun head panel according to claim 1, characterized in that, The terminal seat (6) comprises a cylindrical seat body (601), and the terminal seat clamp (7) is provided with a C-shaped clamping groove (701) for embedding and clamping the cylindrical seat body (601); at least one radial groove is arranged on the outer periphery of the cylindrical seat body (601), and the inner wall of the C-shaped clamping groove (701) of the terminal seat clamp (7) is provided with a radial key matched with the radial groove for simultaneously fixing the terminal seat (6) in the axial and circumferential directions; and the radial temperature sensor positioning hole is arranged on the cylindrical seat body (601), and a temperature sensor is inserted and fixed in the radial temperature sensor positioning hole.

4. The charging gun with replaceable power terminal and gun head panel according to claim 1 or 2 or 3, characterized in that, The power terminal (2) is fixed on the front end face of the cylindrical seat body (601) by the terminal fixing screw (8), the front end face is provided with a circular insertion slot (601c) for inserting the power terminal (2), and the power terminal (2) is sleeved with a terminal sealing ring (11) for closing the circular insertion slot (601c).

5. The charging gun with replaceable power terminal and gun head panel according to claim 1 or 2 or 3, characterized in that, The terminal welding piece (602) is formed at the end of the cylindrical seat body (601) and is located between and welded with the two cable copper cores (12) at the head of the cable (9).

6. The charging gun with replaceable power terminal and gun head panel according to claim 1 or 2 or 3, characterized in that, The rear part of the front plate shell (301) is formed with an extension pipe (301b) corresponding to the power terminal extension hole (301a), and the front part of the C-shaped clamping groove (701) is closed to form a limiting ring (702) for sleeving the extension pipe (301b) to limit the radial movement of the terminal seat clamp (7).

7. The charging gun of claim 1, wherein The gun head seat (3) further comprises an outer peripheral shell (302) formed on the front plate shell (301) and hidden in the gun body shell (1), the outer peripheral shell (302) is provided with a plurality of gun head seat positioning buckles (302a), and the gun body shell (1) is provided with a plurality of gun head seat positioning clamping grooves matched with the gun head seat positioning buckles (302a); at the same time, the gun head seat (3) is fixed to the gun body shell (1) by a plurality of gun head seat fixing screws (13), and the gun head seat (3) is also locked and fixed on the gun body shell (1) together with the gun head panel (4) by a plurality of gun head fixing screws (14) penetrating through the gun head panel (4).

8. The charging gun of claim 1, wherein The front part of the gun body shell (1) is provided with an opening above the front plate shell (301), and a charging socket connecting clamping hook (15) is fixed in the gun body shell (1) and extends outward through the opening, and the gun head panel (4) is provided with an opening for the charging socket connecting clamping hook (15) to extend outward.

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