Automobile brake fluid filling device

Abstract

The present invention discloses an automobile brake fluid filling device, including an adapter, a spoke, a nut plate, a sealing gasket and a locking mechanism; an adapter is provided at the upper end of the adapter, a return suction pipe is provided at the lower end of the adapter, the spoke, the nut plate and the locking mechanism are sequentially sleeved on the adapter from top to bottom, and are located between the adapter and the return suction pipe; the sealing gasket is sleeved on the adapter and is located below the nut plate; the spoke is used to drive the nut plate to form a seal with the end face of the brake fluid reservoir pot mouth through the sealing gasket when the locking mechanism is engaged with the brake fluid reservoir pot mouth. The filling device of the present invention is compatible with the brake fluid reservoir, the specifications of the filling gun head, the structural differences and other change points, thereby improving the flexibility of the filling gun, improving the error-proofing ability of the production process, saving development costs and development cycles, and being safe, reliable, efficient and low in production cost.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile brake fluid filling, and in particular relates to an automobile brake fluid filling device. Background Art

[0002] Brake fluid filling is an important process in the automobile assembly workshop. With the increasing flexibility of automobile production lines, there are differences in the mouth structures of brake fluid reservoirs during the mixed-line production of multiple models. Common brake fluid reservoir mouths have threaded structures and buckle structures. The existing filling gun clamps cannot meet the requirements of different specifications and structures for clamping and filling. Since most of the existing OEM brake fluid filling equipment is imported from abroad, if a filling gun head is developed, it will not only increase high costs and extend the development cycle, but also increase the process layout space of different filling guns on the line.

[0003] To this end, we need to design a set of brake fluid filling tooling that is compatible with changes in brake fluid storage tanks, filling gun head specifications, structural differences, and other points. Summary of the invention

[0004] In view of the above problems, the present invention provides an automobile brake fluid filling device, which is simple to operate, safe and reliable, and meets the requirements of multiple automobile brake fluid filling processes.

[0005] A vehicle brake fluid filling device comprises an adapter, a spoke, a nut plate, a sealing gasket and a locking mechanism; the upper end of the adapter is provided with an adapter interface, the lower end of the adapter is provided with a return suction pipe, the spoke, the nut plate and the locking mechanism are sequentially sleeved on the adapter from top to bottom and are located between the adapter interface and the return suction pipe, the sealing gasket is sleeved on the adapter and is located below the nut plate, and the spoke is used to drive the nut plate to form a seal with the end face of the brake fluid reservoir tank mouth through the sealing gasket when the locking mechanism is engaged with the brake fluid reservoir tank mouth.

[0006] Furthermore, the spoke is threadedly connected to the adapter.

[0007] Furthermore, the outer wall of the nut plate is relatively provided with a second groove and a third groove, and the locking mechanism includes a clamping jaw, and the clamping jaw includes a first jaw and a second jaw, and the upper end of the first jaw is provided with a first boss matching the second groove, and the upper end of the second jaw is provided with a second boss matching the third groove.

[0008] Furthermore, the first boss is connected to the nut plate via a first pin, and the second boss is connected to the nut plate via a second pin.

[0009] Furthermore, the first clamping claw and the second clamping claw are both semi-circular in shape, the first clamping claw is provided with a first semi-circular concave platform and a second semi-circular concave platform from top to bottom, and the second clamping claw is provided with a third semi-circular concave platform and a fourth semi-circular concave platform from top to bottom;

[0010] When the first clamping claw and the second clamping claw are engaged, the first semicircular concave platform and the third semicircular concave platform form a first circular positioning concave platform, and the second semicircular concave platform and the fourth semicircular concave platform form a second circular positioning concave platform.

[0011] Further, the brake fluid filling device also includes a first pin, a second pin, a first spring and a second spring;

[0012] The rear end of the first pin is connected to the first boss, one end of the first spring is sleeved on the front end of the first pin and fixedly connected to the first boss, and the other end of the first spring contacts the bottom of the second groove; the rear end of the second pin is connected to the second boss, one end of the second spring is sleeved on the front end of the second pin and fixedly connected to the second boss, and the other end of the second spring contacts the bottom of the third groove.

[0013] Furthermore, the locking mechanism further comprises a locking pressure rod, and the locking pressure rod comprises a first positioning plate, a second positioning plate and a connecting rod;

[0014] A first circular hole is provided at one end of the first positioning plate, and the other end of the first positioning plate is connected to the second positioning plate through the connecting rod, a second circular hole is provided on the second positioning plate at a position relative to the first circular hole, a first positioning notch is provided at the middle position of the first positioning plate, and a second positioning notch is provided on the second positioning plate at a position relative to the first positioning notch.

[0015] Further, the first claw is provided with a first positioning boss and a second positioning boss on two opposite sides, the second claw is provided with a third positioning boss and a fourth positioning boss on two opposite sides, and the locking mechanism further includes a third pin, a fourth pin, a fifth pin and a sixth pin;

[0016] The front end of the third pin is connected to the first positioning boss, the front end of the fourth pin is connected to the second positioning boss, the front end of the fifth pin is connected to the third positioning boss, and the front end of the sixth pin is connected to the fourth positioning boss; the first circular hole is rotatably connected to the rear end of the third pin, the second circular hole is rotatably connected to the rear end of the fourth pin, the outer diameter of the rear end of the fifth pin is matched with the width of the first positioning slot, and the outer diameter of the rear end of the sixth pin is matched with the width of the second positioning slot.

[0017] Furthermore, the adapter is provided with an annular boss below the spoke, the nut plate is mounted on the annular boss, the adapter is provided with an annular recess below the annular boss, the sealing gasket is arranged in the annular recess, and the upper end of the sealing gasket is in contact with the annular boss.

[0018] Furthermore, the first positioning notch is provided with a first chamfer on a side close to the first circular hole, and the second positioning notch is provided with a second chamfer on a side close to the second circular hole.

[0019] Beneficial effects of the present invention: The filling device of the present invention is compatible with the brake fluid storage tank, filling gun head specifications, structural differences and other changing points, thereby improving the flexibility of the filling gun, improving the error-proofing capability of the production process, saving development costs and development cycles, and being safe, reliable, efficient, and low in production cost.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of a vehicle brake fluid filling device according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of spoke installation according to an embodiment of the present invention is shown;

[0024] Figure 3 A schematic diagram of the nut plate and the clamping jaw structure according to an embodiment of the present invention is shown;

[0025] Figure 4 A schematic diagram of the installation of a nut plate and a clamping jaw according to an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram of the structure of the first clamping claw and the second clamping claw according to an embodiment of the present invention is shown;

[0027] Figure 6 A schematic diagram of the locking pressure rod structure according to an embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram of the structure of an adapter according to an embodiment of the present invention is shown.

[0029] In the figure: 1, adapter; 2, spoke; 3, nut plate; 4, sealing gasket; 5, locking mechanism; 6, adapter; 7, suction pipe; 8, first pin; 9, second pin; 10, first spring; 11, second spring; 21, first groove; 51, clamping claw; 52, locking pressure rod; 31, first through hole; 32, second groove; 33, third groove; 511, first claw; 512, second claw; 5111, first boss; 5121, second boss; 34, fifth through hole; 35, sixth through hole; 5112, fourth through hole; 5113, first Semicircular concave platform; 5114, second semicircular concave platform; 5115, first positioning boss; 5116, second positioning boss; 5122, seventh through hole; 5123, third semicircular concave platform; 5124, fourth semicircular concave platform; 5125, third positioning boss; 5126, fourth positioning boss; 521, first positioning plate; 522, second positioning plate; 523, connecting rod; 5211, first circular hole; 5212, first positioning notch; 5221, second circular hole; 5222, second positioning notch; 101, annular boss; 102, annular concave platform. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second" etc. in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged in appropriate circumstances, so that the embodiments of the present application described here. In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the orientation or positional relationship shown in the accompanying drawings.

[0032] The invention provides an automobile brake fluid filling device, which can be suitable for filling brake fluid at the mouths of brake fluid storage tanks with different structures, improves the flexibility of a filling gun, improves the error-proofing capability of a production process, and saves development costs and development cycles.

[0033] See also Figure 1 and Figure 2 A vehicle brake fluid filling device comprises an adapter 1, a spoke 2, a nut plate 3, a sealing gasket 4 and a locking mechanism 5. The upper end of the adapter 1 is provided with an adapter port 6, and the adapter port 6 is used to connect with a filling gun. The lower end of the adapter 1 is provided with a back suction pipe 7. When the brake fluid filling device is used, the back suction pipe 7 is inserted into the brake fluid storage tank. After the brake fluid is filled to a pressure balance, the excess liquid is sucked to a required liquid level through the back suction pipe 7.

[0034] The spoke 2, the nut plate 3, and the locking mechanism 5 are sequentially sleeved on the adapter 1 from top to bottom and are located between the adapter port 6 and the return suction pipe 7. The sealing gasket 4 is sleeved on the adapter 1 and is located below the nut plate 3. The locking mechanism 5 includes a clamping claw 51 and a locking pressure rod 52. When the locking pressure rod 52 is pressed down, the clamping claw 51 is clamped with the mouth of the brake fluid reservoir tank.

[0035] The spoke 2 is threadedly connected to the adapter 1, and the spoke 2 can move linearly along the axial direction of the adapter 1. Specifically, the spoke 2 is annular, and the inner wall of the spoke 2 is provided with an internal thread, and the outer wall of the adapter 1 is axially provided with an external thread matching the internal thread. The spoke 2 is used to drive the nut plate 3 to form a seal with the end face of the brake fluid reservoir tank mouth through the sealing gasket 4 when the locking mechanism 5 is engaged with the brake fluid reservoir tank mouth.

[0036] In one embodiment, Figure 2 As shown, in order to prevent the spoke 2 from slipping when rotating, the spoke 2 is provided with a plurality of first grooves 21 along the circumferential direction. The first grooves 21 are used to prevent the operator from slipping when rotating the spoke 2. The cross-section of the first grooves 21 can be set to be semicircular, rectangular, etc., which is not specifically limited in the present invention.

[0037] See also Figure 3 - Figure 5 A first through hole 31 is provided in the middle of the nut plate 3, and the inner diameter of the first through hole 31 is not less than the outer diameter of the adapter 1. The lower end of the adapter 1 passes through the first through hole 31, and the outer wall of the nut plate 3 is relatively provided with a second groove 32 and a third groove 33. The clamping jaw 51 includes a first claw 511 and a second claw 512. The upper end of the first claw 511 is provided with a first boss 5111 matching the second groove 32, and the upper end of the second claw 512 is provided with a second boss 5121 matching the third groove 33. The first boss 5111 and the second boss 5121 can slide axially and radially in the second groove 32 and the third groove 33 toward the adapter 1.

[0038] In one embodiment, the first boss 5111 is connected to the nut plate 3 via a first pin, and the second boss 5121 is connected to the nut plate 3 via a second pin.

[0039] Specifically, the nut plate 3 is provided with a second through hole and a third through hole on both sides of the second groove 32. Figure 5As shown, a fourth through hole 5112 is provided on the first boss 5111, and the second through hole, the third through hole and the fourth through hole 5112 are concentrically arranged, and one end of the first pin shaft passes through the second through hole, the fourth through hole 5112 and the third through hole in sequence to fix the first claw 511 to the nut plate 3.

[0040] Specifically, the nut plate 3 is provided with a fifth through hole 34 and a sixth through hole 35 on both sides of the third groove 33. Figure 5 As shown, a seventh through hole 5122 is provided on the second boss 5121, and the fifth through hole 34, the sixth through hole 35 and the seventh through hole 5122 are concentrically arranged, and one end of the second pin shaft passes through the fifth through hole 34, the sixth through hole 35 and the seventh through hole 5122 in sequence to fix the second claw 512 to the nut plate 3.

[0041] The first clamping claw 511 and the second clamping claw 512 are both semi-circular in shape. The first clamping claw 511 is provided with a first semi-circular concave platform 5113 and a second semi-circular concave platform 5114 from top to bottom. The first semi-circular concave platform 5113 and the second semi-circular concave platform 5114 are arranged concentrically, and the outer diameter of the first semi-circular concave platform 5113 is larger than the outer diameter of the second semi-circular concave platform 5114. The second clamping claw 512 is provided with a third semi-circular concave platform 5123 and a fourth semi-circular concave platform 5124 from top to bottom. The third semi-circular concave platform 5123 and the fourth semi-circular concave platform 5124 are arranged concentrically, and the outer diameter of the third semi-circular concave platform 5123 is larger than the outer diameter of the fourth semi-circular concave platform 5124.

[0042] When the first clamping claw 511 and the second clamping claw 512 are engaged, the first semicircular concave platform 5113 and the third semicircular concave platform 5123 form a first circular positioning concave platform, and the second semicircular concave platform 5114 and the fourth semicircular concave platform 5124 form a second circular positioning concave platform.

[0043] In one embodiment, Figure 3 As shown, the brake fluid filling device further includes a first pin 8, a second pin 9, a first spring 10 and a second spring 11. The first pin 8 and the second pin 9 both include a cylindrical section at the front end and a threaded section at the rear end. The first boss 5111 is provided with a first threaded hole in the radial direction, and the first threaded hole is located above the fourth through hole 5112. The second boss 5121 is provided with a second threaded hole in the radial direction, and the second threaded hole is located above the seventh through hole 5122. The threaded section of the first pin 8 is connected to the first threaded hole. One end of the first spring 10 is sleeved on the cylindrical section of the first pin 8 and fixedly connected to the first boss 5111. The other end of the first spring 10 contacts the bottom of the second groove 32. The threaded section of the second pin 9 is connected to the second threaded hole. One end of the second spring 11 is sleeved on the cylindrical section of the second pin 9 and fixedly connected to the second boss 5121. The other end of the second spring 11 contacts the bottom of the third groove 33.

[0044] In one embodiment, the locking mechanism 5 further includes a third pin, a fourth pin, a fifth pin and a sixth pin, and the third pin, the fourth pin, the fifth pin and the sixth pin all include a threaded section at the front end and a cylindrical section at the rear end.

[0045] A first positioning boss 5115 and a second positioning boss 5116 are arranged on two opposite sides of the first clamping claw 511, a third positioning boss 5125 and a fourth positioning boss 5126 are arranged on two opposite sides of the second clamping claw 512, the front end of the third pin is connected to the first positioning boss 5115, the front end of the fourth pin is connected to the second positioning boss 5116, the front end of the fifth pin is connected to the third positioning boss 5125, and the front end of the sixth pin is connected to the fourth positioning boss 5126.

[0046] Specifically, the first positioning boss 5115 is provided with a third threaded hole radially along the first clamping claw 511, the second positioning boss 5116 is provided with a fourth threaded hole radially along the first clamping claw 511, the threaded section at the front end of the third pin is connected to the third threaded hole, and the threaded section at the front end of the fourth pin is connected to the fourth threaded hole.

[0047] Specifically, the third positioning boss 5125 is provided with a fifth threaded hole along the radial direction of the second claw 512, the fourth positioning boss 5126 is provided with a sixth threaded hole along the radial direction of the second claw 512, the threaded section at the front end of the fifth pin is connected to the fifth threaded hole, and the threaded section at the front end of the sixth pin is connected to the sixth threaded hole. The outer diameter of the cylindrical section at the rear end of the fifth pin is matched with the width of the first positioning notch 5212, and the outer diameter of the cylindrical section at the rear end of the sixth pin is matched with the width of the second positioning notch 5222.

[0048] See also Figure 6 The locking pressure rod 52 includes a first positioning plate 521, a second positioning plate 522 and a connecting rod 523. A first circular hole 5211 is provided at one end of the first positioning plate 521. The other end of the first positioning plate 521 is connected to the second positioning plate 522 through the connecting rod 523. The first positioning plate 521 and the second positioning plate 522 are arranged in parallel. The second positioning plate 522 is provided with a second circular hole 5221 at a position opposite to the first circular hole 5211. A first positioning notch 5212 is provided at the middle position of the first positioning plate 521. The second positioning plate 522 is provided with a second positioning notch 5222 at a position opposite to the first positioning notch 5212.

[0049] The first circular hole 5211 of the first positioning plate 521 is rotatably connected to the cylindrical section at the rear end of the third pin, and the second circular hole 5221 of the second positioning plate 522 is rotatably connected to the cylindrical section at the rear end of the fourth pin. When the clamp 51 needs to be locked, the connecting rod 523 of the locking pressure rod 52 is pulled to engage the first positioning groove 5212 with the cylindrical section at the rear end of the fifth pin, and the second positioning groove 5222 with the cylindrical section at the rear end of the sixth pin.

[0050] In one embodiment, in order to facilitate the locking of the locking rod 52 and the clamping jaw 51, the first positioning slot 5212 is provided with a first chamfer on the side close to the first circular hole 5211, and the second positioning slot 5222 is provided with a second chamfer on the side close to the second circular hole 5221. The chamfers provided when the locking rod 52 is locked act as a guide, so that the first positioning slot 5212 and the second positioning slot 5222 are quickly aligned with the fifth pin and the sixth pin, thereby improving the clamping efficiency.

[0051] In one embodiment, see Figure 7 The adapter 1 is provided with an annular boss 101 below the spoke 2, and the annular boss 101 is used to limit the spoke 2 from moving further downward. The nut plate 3 is sleeved on the annular boss 101, and the outer diameter of the annular boss 101 is not greater than the outer diameter of the first through hole 31.

[0052] The adapter 1 is provided with an annular recess 102 below the annular boss 101, and the sealing gasket 4 is arranged in the annular recess 102. The upper end of the sealing gasket 4 contacts the annular boss 101. When the first clamping claw 511 and the second clamping claw 512 are engaged, the lower end of the sealing gasket 4 contacts the first semicircular recess 5113 and the third semicircular recess 5123 to form a first circular positioning recess.

[0053] In one embodiment, the outer diameter of the suction pipe 7 is smaller than the outer diameter of the lower end of the adapter 1, and a third chamfer is provided at the lower end of the adapter 1. The third chamfer enables the lower end of the adapter 1 to be quickly aligned with the mouth of the brake fluid reservoir tank, thereby improving assembly efficiency.

[0054] The principle of the present invention is as follows: the operator presses the first boss 5111 and the second boss 5121 on the first claw 511 and the second claw 512 with both hands, respectively removes the first pin shaft and the second pin shaft connecting the first claw 511 and the second claw 512 with the nut plate 3, inserts the return suction pipe 7 at the lower end of the adapter 1 into the brake fluid reservoir, engages the first claw 511 and the second claw 512, and the second semicircular concave platform 5114 and the fourth semicircular concave platform 5124 form a second circular positioning concave platform to clamp the brake fluid. The mouth of the brake fluid reservoir tank is opened, and the first boss 5111 and the second boss 5121 on the first claw 511 and the second claw 512 are released. The first claw 511 and the second claw 512 are restored to their original positions by the first spring 10 and the second spring 11. The locking rod 52 is pulled to lock the first claw 511 and the second claw 512. Then the spoke 2 on the adapter 1 is manually twisted. When the spoke 2 moves downward, it pushes the nut plate 3 to move downward, thereby pushing the sealing gasket 4 to seal tightly with the end face of the mouth of the brake fluid reservoir tank. Then the filling gun claw clamps the front end adapter 6 of the adapter 1, and then presses the filling button on the filling gun to start the brake fluid filling operation. Finally, when the pressure is balanced, the excess liquid is sucked to the required liquid level through the back suction pipe 7, thereby completing a filling cycle.

[0055] The brake fluid filling device of the embodiment of the present invention has a simple structure, convenient and reliable operation, and a high degree of flexibility. The entire brake fluid filling device is compatible with the brake fluid storage tank, filling gun head specifications, structural differences and other changes, thereby improving the flexibility of the filling gun, improving the error-proofing capability of the production process, saving development costs and development cycles, and being safe, reliable, efficient, and low in manufacturing cost.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automobile brake fluid filling device, characterized in that: It comprises an adapter (1), a wheel spoke (2), a nut plate (3), a sealing gasket (4) and a locking mechanism (5); The upper end of the adapter (1) is provided with an adapter port (6), the lower end of the adapter (1) is provided with a return suction pipe (7), the spoke (2), the nut plate (3), and the locking mechanism (5) are sequentially sleeved on the adapter (1) from top to bottom and are located between the adapter port (6) and the return suction pipe (7), the sealing gasket (4) is sleeved on the adapter (1) and is located below the nut plate (3), and the spoke (2) is used to drive the nut plate (3) to form a seal with the end surface of the brake fluid reservoir pot mouth through the sealing gasket (4) when the locking mechanism (5) is engaged with the brake fluid reservoir pot mouth; The outer wall of the nut plate (3) is relatively provided with a second groove (32) and a third groove (33); the locking mechanism (5) comprises a clamping jaw (51); the clamping jaw (51) comprises a first clamping jaw (511) and a second clamping jaw (512); the upper end of the first clamping jaw (511) is provided with a first boss (5111) matching the second groove (32); the upper end of the second clamping jaw (512) is provided with a second boss (5121) matching the third groove (33).

2. The automobile brake fluid filling device according to claim 1, characterized in that: The wheel spoke (2) is threadedly connected to the adapter (1).

3. The automobile brake fluid filling device according to claim 1, characterized in that: The first boss (5111) is connected to the nut plate (3) via a first pin shaft, and the second boss (5121) is connected to the nut plate (3) via a second pin shaft.

4. The automobile brake fluid filling device according to claim 3, characterized in that: The first clamping claw (511) and the second clamping claw (512) are both semi-annular in shape. The first clamping claw (511) is provided with a first semi-circular concave platform (5113) and a second semi-circular concave platform (5114) from top to bottom, and the second clamping claw (512) is provided with a third semi-circular concave platform (5123) and a fourth semi-circular concave platform (5124) from top to bottom. When the first clamping claw (511) and the second clamping claw (512) are engaged, the first semicircular recess (5113) and the third semicircular recess (5123) form a first circular positioning recess, and the second semicircular recess (5114) and the fourth semicircular recess (5124) form a second circular positioning recess.

5. The automobile brake fluid filling device according to claim 4, characterized in that: The brake fluid filling device also includes a first pin (8), a second pin (9), a first spring (10) and a second spring (11); The rear end of the first pin (8) is connected to the first boss (5111), one end of the first spring (10) is sleeved on the front end of the first pin (8) and fixedly connected to the first boss (5111), and the other end of the first spring (10) contacts the bottom of the second groove (32); the rear end of the second pin (9) is connected to the second boss (5121), one end of the second spring (11) is sleeved on the front end of the second pin (9) and fixedly connected to the second boss (5121), and the other end of the second spring (11) contacts the bottom of the third groove (33).

6. The automobile brake fluid filling device according to claim 5, characterized in that: The locking mechanism (5) further comprises a locking pressure rod (52), wherein the locking pressure rod (52) comprises a first positioning plate (521), a second positioning plate (522) and a connecting rod (523); A first circular hole (5211) is provided at one end of the first positioning plate (521), and the other end of the first positioning plate (521) is connected to the second positioning plate (522) through the connecting rod (523); a second circular hole (5221) is provided on the second positioning plate (522) at a position relative to the first circular hole (5211); a first positioning notch (5212) is provided at a middle position of the first positioning plate (521), and a second positioning notch (5222) is provided on the second positioning plate (522) at a position relative to the first positioning notch (5212).

7. The automobile brake fluid filling device according to claim 6, characterized in that: The first clamping claw (511) is provided with a first positioning boss (5115) and a second positioning boss (5116) on two opposite sides, the second clamping claw (512) is provided with a third positioning boss (5125) and a fourth positioning boss (5126) on two opposite sides, and the locking mechanism (5) further comprises a third pin, a fourth pin, a fifth pin and a sixth pin; The front end of the third pin is connected to the first positioning boss (5115), the front end of the fourth pin is connected to the second positioning boss (5116), the front end of the fifth pin is connected to the third positioning boss (5125), and the front end of the sixth pin is connected to the fourth positioning boss (5126); the first circular hole (5211) is rotatably connected to the rear end of the third pin, the second circular hole (5221) is rotatably connected to the rear end of the fourth pin, the outer diameter of the rear end of the fifth pin is matched with the width of the first positioning slot (5212), and the outer diameter of the rear end of the sixth pin is matched with the width of the second positioning slot (5222).

8. The automobile brake fluid filling device according to any one of claims 1 to 7, characterized in that: The adapter (1) is provided with an annular boss (101) below the spoke (2), the nut plate (3) is sleeved on the annular boss (101), the adapter (1) is provided with an annular recess (102) below the annular boss (101), the sealing gasket (4) is arranged in the annular recess (102), and the upper end of the sealing gasket (4) is in contact with the annular boss (101).

9. The automobile brake fluid filling device according to claim 6 or 7, characterized in that: The first positioning notch (5212) is provided with a first chamfer on a side close to the first circular hole (5211), and the second positioning notch (5222) is provided with a second chamfer on a side close to the second circular hole (5221).

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