Vacuum-pumping circulating oil injection device for disc brake assembly and using method of vacuum-pumping circulating oil injection device

By designing a vacuum circulation oil injection device for disc brake assembly, vacuum and oil injection are achieved at the same time as the upper and lower pumps, the problems of low efficiency and air residue in the prior art are solved, and the brake performance and equipment production efficiency are improved.

CN119914595APending Publication Date: 2025-05-02RUIAN PARTNER AUTOMATION EQUIP CO LTD
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Patent Information

Application Number
CN202510188195.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2025-05-02

AI Technical Summary

Technical Problem

The existing disc brake assembly has low efficiency in oil injection and vacuum extraction methods, and it is impossible to effectively vacuum the upper and lower pumps at the same time, resulting in air residue and affecting the stability and reliability of brake performance.

Method used

A disc brake assembly vacuum circulation oil injection device is designed. Through the design of the upper pump filling head and the lower pump connector, the upper pump and the lower pump are vacuumed and oil injection at the same time. The opening and closing components of the return oil passage and the oil injection passage are used to realize the circulating flow of oil and completely discharge residual bubbles.

Benefits of technology

It improves the vacuum efficiency and effect, ensures no air residue in the disc brake assembly, improves the transmission efficiency of brake oil, improves the sensitivity and safety of the brake, simplifies the equipment structure, and reduces costs and operation difficulty.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a disc brake assembly vacuumizing circulating oiling device and a using method thereof. The disc brake assembly vacuumizing circulating oiling device is composed of an upper pump, a lower pump, a connecting pipeline, an upper pump filling head and a lower pump connector. The upper pump filling head is provided with an oil return channel and a vacuumizing channel, and is connected with the oil storage device and the vacuumizing device; the lower pump connector is provided with an oil injection channel and a vacuumizing channel which are connected with the devices, and each channel is internally provided with an opening and closing assembly. The device has the remarkable advantages that the structure is simple, the integration degree is high, vacuumizing and oil injection functions are integrated, equipment is simplified, and cost is reduced; the upper pump and the lower pump can be vacuumized at the same time, the operation process is convenient to convert, and the production efficiency is greatly improved; a circular filling function is achieved, brake oil enters from a lower pump and is discharged from an upper pump, circular flowing is achieved, residual bubbles are thoroughly discharged, air can be thoroughly discharged, bubbles are brought out during oil filling, and brake sensitivity and safety are improved. And redundant brake oil flows back to the oil storage device for secondary utilization, so that waste and pollution are reduced.
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Description

Technical Field

[0001] The invention relates to the technical field of disc brake assembly processing equipment, and in particular to a disc brake assembly vacuum circulation oil injection device and a use method thereof. Background Art

[0002] In the existing disc brake assembly manufacturing and maintenance process, oil injection and vacuuming are two key and essential operating procedures. Traditional disc brake assembly oil injection and vacuuming operations usually use relatively cumbersome processes and equipment. Generally, different equipment and devices are used to complete the two steps of oil injection and vacuuming. The oil injection equipment is responsible for injecting brake oil into the disc brake system, and the vacuuming equipment is used to remove air from the system.

[0003] Traditional vacuuming methods often cannot effectively vacuum both the upper and lower pumps at the same time, resulting in low vacuuming efficiency and a lot of residual air inside the disc brake assembly, affecting the stability and reliability of the braking performance. Moreover, during the oil filling process, it is impossible to effectively remove the bubbles remaining inside the product, which will reduce the transmission efficiency of the brake oil and affect the sensitivity and safety of the brake.

[0004] To sum up, the existing disc brake assembly oil injection and vacuum extraction method has shortcomings in equipment structure, production efficiency, vacuum extraction effect and resource utilization. There is an urgent need for a new device that can combine the vacuum extraction and oil injection functions, simplify the equipment structure, improve production efficiency, and at the same time ensure the vacuum extraction effect and brake oil recycling. Summary of the invention

[0005] In view of the deficiencies in the background technology, the present invention provides a disc brake assembly vacuum circulation oil injection device.

[0006] The technical solution adopted by the present invention is: a disc brake assembly vacuum circulation oil injection device, including an upper pump, a lower pump and a connecting pipeline for connecting the upper pump and the lower pump, and also includes:

[0007] An upper pump filling head connected to the upper pump, wherein an oil return channel and a vacuum channel 1 are provided in the upper pump filling head, wherein the oil return channel is connected to the oil storage device via an oil return pipeline, and the vacuum channel 1 is connected to the vacuum device via a vacuum pipeline 1;

[0008] A lower pump connector connected to the lower pump, wherein the lower pump connector is provided with an oil injection channel and a second vacuum pumping channel, the oil injection channel is connected to the oil storage device via an oil injection pipeline, and the second vacuum pumping channel is connected to the vacuum pumping device via a second vacuum pumping pipeline;

[0009] The oil return channel, the oil injection channel, the first vacuum channel and the second vacuum channel are all provided with opening and closing components for controlling the opening and closing of the oil injection channel and the second vacuum channel.

[0010] Furthermore, a lifting and lateral movement mechanism is provided on the upper pump filling head.

[0011] Furthermore, the lifting and transverse movement mechanism includes a mounting plate, a transverse movement cylinder fixed on the mounting plate, a cylinder support connected to the output end of the transverse movement cylinder, and a lifting cylinder fixed on the cylinder support, and the lifting cylinder is connected to the upper pump filling head.

[0012] Furthermore, a residual oil channel is provided on the upper pump filling head, and an opening and closing component is provided in the residual oil channel.

[0013] Furthermore, the opening and closing assembly includes a pneumatic piston and a plug connected to the pneumatic piston. The pneumatic piston is installed in a piston cavity. An air inlet channel is provided on the piston cavity on both sides of the pneumatic piston.

[0014] Furthermore, the lower pump connector includes a quick connector, an adapter block connected to the quick connector, and an outer shell mounted outside the adapter block. The quick connector is provided with an oil filling port, and the oil filling channel and the vacuum channel are arranged in the adapter block and are both connected to the oil filling port.

[0015] Furthermore, the quick connector includes an oil filling core provided with an oil filling port, a sleeve slidably mounted outside the oil filling core, an opening and closing mechanism for driving the sleeve to move up and down, and a quick-connect shell and a quick-connect sealing head mounted on the sleeve. A circle of movable steel balls is provided on the top of the sleeve, and a yielding ring groove and a pressing surface are provided on the inner wall of the quick-connect sealing head.

[0016] Furthermore, the opening and closing mechanism is a piston body fixed on the sleeve, and a piston cavity 2 for installing the piston body is provided in the quick-connect housing, and an air intake channel 2 is provided on the piston cavity 2 located on both sides of the piston body.

[0017] Furthermore, a sealing groove for installing a sealing ring is provided on the top of the quick-connect sealing head.

[0018] The present application also discloses a method for using a disc brake assembly vacuum evacuation circulation oil injection device, comprising the following steps:

[0019] S1. One-time vacuuming: open the vacuum valve and pressure-maintaining valve on the vacuum pipeline 1 and the vacuum pipeline 2, and use the vacuum device to vacuum the upper pump and the lower pump at the same time;

[0020] S2. Leakage detection: Close the vacuum valves on the vacuum pipeline 1 and the vacuum pipeline 2, and detect whether there is leakage in the disc brake assembly;

[0021] S 3. Secondary vacuuming: Open the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2 to perform secondary vacuuming;

[0022] S 4. Oil filling: Close the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2, open the oil filling valve at the lower pump end, and fill the disc brake assembly with brake fluid;

[0023] S 5. Remove residual bubbles: Open the return valve of the oil return line and the oil filling valve of the oil filling line at the same time. The brake oil flows from the lower pump into the upper pump and the brake oil flows back and out from the return line of the upper pump at the same time. The brake oil circulates in the disc brake assembly to remove the bubbles remaining in the disc brake assembly and further remove the residual air.

[0024] S 6. End: First close the oil filling valve on the oil filling pipeline, and then delay closing the suction valve on the oil return pipeline to suck out the excess oil, and the filling is completed.

[0025] The beneficial effects of the present invention are:

[0026] 1. Connect the upper pump and the lower pump at the same time. When evacuating the vacuum, evacuate the upper pump and the lower pump at the same time. When filling oil, inject from the lower pump and discharge from the upper pump. The oil in the disc brake assembly forms a cycle to completely expel the residual bubbles.

[0027] 2. Simple structure and high integration: This application integrates the vacuuming and oiling functions into one device, abandoning the traditional multi-device separate operation mode. This makes the equipment structure more streamlined, simplifies the equipment structure, and reduces costs.

[0028] 3. Improve production efficiency: This application can simultaneously vacuum the upper and lower pumps, greatly shortening the time required for vacuuming compared to the traditional single-end vacuuming method. Moreover, the process from vacuuming to oiling does not require frequent switching of equipment and complicated operating procedures, and can be directly converted by controlling the opening and closing components, further saving operation time, significantly improving production efficiency, and meeting the needs of large-scale production.

[0029] 4. Improve vacuuming effect and braking performance: The design of vacuuming at both ends can more thoroughly remove the air in the disc brake assembly and reduce air residue. During the oil filling process, the circulation of brake fluid can effectively remove the bubbles remaining inside the assembly to ensure that there is no air residue inside. This greatly improves the transmission efficiency of brake fluid, thereby improving the sensitivity and safety of the brake, ensuring the stable and reliable operation of the disc brake system, and extending the service life of the disc brake assembly.

[0030] 5. Resource recycling and environmental protection and energy saving: For the excess brake fluid, this application can return it to the oil storage device through the return oil pipeline and the excess oil channel for secondary use, forming a good oil circulation system. This not only avoids the waste of brake fluid and reduces production costs, but also reduces the pollution of waste brake fluid to the environment, conforms to the development concept of environmental protection and energy saving, and provides strong support for the sustainable development of enterprises.

[0031] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of the upper pump filling head.

[0034] Figure 3 It is a schematic cross-sectional view of the upper pump filling head.

[0035] Figure 4 for Figure 3 Schematic diagram of the cross section of AA.

[0036] Figure 5 Schematic diagram of the cross section of the lower pump connector.

[0037] Figure 6 This is a schematic cross-sectional view of the lower pump connector at the movable ball.

[0038] Figure 7 Schematic diagram of the lower pump connector with the outer shell hidden for the lower pump connector.

[0039] Figure 8 Schematic diagram of component connection of the invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] The invention provides a disc brake assembly vacuum pumping and circulating oil injection device.

[0043] In this embodiment, refer to Figure 1-8 The disc brake assembly vacuum circulation oil injection device comprises an upper pump 1, a lower pump 2 and a connecting pipe 3 for connecting the upper pump and the lower pump, and also comprises:

[0044] An upper pump filling head 4 connected to the upper pump, wherein an oil return channel 5 and a vacuum channel 1 6 are provided in the upper pump filling head 4, wherein the oil return channel 5 is connected to the oil storage device via an oil return pipeline, and the vacuum channel 1 is connected to the vacuum device via a vacuum pipeline 1;

[0045] A lower pump connector 7 connected to the lower pump, wherein the lower pump connector 7 is provided with an oil injection channel 8 and a second vacuum channel 9, wherein the oil injection channel is connected to the oil storage device via an oil injection pipeline, and the second vacuum channel is connected to the vacuum device via a second vacuum pipeline;

[0046] The oil return channel, the oil injection channel, the vacuum channel 1 and the vacuum channel 2 are all provided with an opening and closing component 10 for controlling the opening and closing of the oil injection channel and the vacuum channel 2.

[0047] In the above technical solution, by setting the upper pump filling head and the lower pump connector, as well as the corresponding oil return channel, oil injection channel, vacuum channel, and connecting with the oil storage device and the vacuum device, the vacuum and oil injection functions are integrated. This not only simplifies the overall structure of the equipment and avoids the complexity of multiple equipment working together, but also enables the vacuum and oil injection operations to be connected in an orderly manner, improves work efficiency, and reduces equipment costs and operating difficulties.

[0048] When in use, connect the upper pump filling head to the lifting pump, connect the lower pump connector to the lower pump, and use the vacuum device to vacuum the upper and lower pumps at the same time, which can improve the vacuum efficiency and vacuum effect. After the vacuum is complete, use the opening and closing components to open (when vacuuming, use the opening and closing components to open the vacuum channel and close the oil injection channel), open the oil injection channel, and inject oil into the product, and use oil injection to discharge the residual air inside.

[0049] Specifically, the upper pump filling head is provided with a lifting and lateral movement mechanism.

[0050] In this embodiment, a lifting and lateral movement mechanism is provided on the connecting head, which can realize the flexible movement of the upper pump filling head in space. By adjusting the position, the connection and disconnection of the connecting head and the upper pump can be completed, and automatic disconnection can be realized.

[0051] Specifically, the lifting and transverse movement mechanism includes a mounting plate 11, a transverse movement cylinder 12 fixed on the mounting plate 11, a cylinder support 13 connected to the output end of the transverse movement cylinder 12, and a lifting cylinder 14 fixed on the cylinder support 13, and the lifting cylinder is connected to the upper pump filling head.

[0052] In this embodiment, the transverse cylinder realizes horizontal displacement adjustment, and the lifting cylinder realizes vertical height adjustment, so that the upper pump filling head can be quickly and accurately docked with the upper pump, improving the convenience and efficiency of installation and operation, and reducing the time and error of manual alignment.

[0053] Specifically, a residual oil channel 15 is further provided on the upper pump filling head, and an opening and closing component 10 is provided in the residual oil channel.

[0054] In this embodiment, the upper pump filling head is provided with a residual oil channel, and the residual oil channel can be connected to the oil storage device through a pipeline. After the oil filling is completed, the excess oil can be conveniently sucked out from the residual oil channel, thereby avoiding the influence of oil residue on the performance of the disc brake assembly, ensuring product quality, and also making the entire oil filling process more standardized and controllable.

[0055] Specifically, the opening and closing assembly includes a pneumatic piston 16 and a plug 17 connected to the pneumatic piston. The pneumatic piston is installed in a piston cavity 18. The piston cavity 1 is located on both sides of the pneumatic piston and is provided with an air inlet channel 19.

[0056] In this embodiment, an opening and closing assembly consisting of a pneumatic piston and a plug is used to accurately control the opening and closing of the channel by controlling the ventilation of the air inlet channel 1. This pneumatic control method has a fast response speed and high control accuracy. Compared with the traditional mechanical control method, it can better adapt to the needs of fast and efficient production, and has good stability, reducing the probability of failure.

[0057] like Figure 2 and 3 As shown, taking the above pump filling head as an example, the plug is connected to the pneumatic piston, and the pneumatic piston is driven to move by inflating air into one side of the pneumatic piston through the air inlet channel 1, thereby driving the plug to move to open the channel (such as the oil return channel, the oil injection channel, the vacuum channel 1 and the vacuum channel 2).

[0058] In the upper pump filling head, the inlet sections of the oil return channel and the vacuum channel are controlled by the opening and closing components, while the outlet sections are connected and share a common outlet.

[0059] Specifically, the lower pump connector includes a quick connector 20, an adapter block 21 connected to the quick connector 20, and an outer shell 22 mounted outside the adapter block. The quick connector is provided with an oil filling port 23. The oil filling channel and the vacuum channel are provided in the adapter block and are both connected to the oil filling port.

[0060] In this embodiment, the lower pump connector includes a quick connector adapter block and an outer shell sleeved outside the adapter block, and the quick connector and the lower pump are used to achieve rapid disassembly and assembly.

[0061] The bottom of the oil filling channel and the second vacuum channel of the adapter block is provided with a "T"-shaped channel 36 connected with the oil filling port. After opening, the oil filling channel or the second vacuum channel is connected with the oil filling port through the "T"-shaped channel.

[0062] Specifically, the quick connector includes an oil filling core 24 provided with an oil filling port, a sleeve 25 slidably mounted outside the oil filling core, an opening and closing mechanism 26 for driving the sleeve to move up and down, and a quick-connect shell 27 and a quick-connect sealing head 28 mounted on the sleeve. A circle of movable steel balls 29 is provided on the top of the sleeve, and a yielding ring groove 30 and a pressing surface 31 are provided on the inner wall of the quick-connect sealing head.

[0063] In this embodiment, the sleeve of the quick connector can move up and down, and the movable steel ball cooperates with the clearance ring groove and the pressing surface of the quick-connect sealing head. When connected for use, the quick-connect sealing head is aligned and inserted into the refueling pipe 37 of the upper pump, and the opening and closing mechanism is used to drive the sleeve to move upward. During the upward movement of the sleeve, the movable steel ball moves from the clearance ring groove to the pressing surface. Under the action of the pressing surface, the movable steel ball protrudes inward to clamp the refueling pipe 37. The connection and disconnection are simple to operate and the seal is reliable. It can not only ensure that there will be no oil or gas leakage during the oil filling and vacuuming process, but also quickly realize the connection and separation with the lower pump, thereby improving the working efficiency.

[0064] Specifically, the opening and closing mechanism is a piston body 32 fixed on the sleeve, a second piston cavity 33 for installing the piston body 32 is provided in the quick-connect housing, and a second air intake channel 34 is provided on the second piston cavity located on both sides of the piston body.

[0065] In this embodiment, the opening and closing mechanism is similar to the opening and closing component structure in principle, and gas is introduced into the piston chamber two on one side of the piston body through the air inlet channel two to drive the piston body to move in the piston chamber two, thereby indirectly driving the sleeve connected to the piston body to move up and down, realizing automatic disconnection and connection of the quick connector, improving the level of automation, and reducing labor costs.

[0066] Specifically, a sealing groove 35 for installing a sealing ring is provided on the top of the quick-connect sealing head.

[0067] In this embodiment, the top of the quick-connect sealing head is pressed against the refueling pipe of the upper pump, so that the top of the quick-connect sealing head presses the sealing groove against the refueling pipe of the upper pump to ensure the sealing performance of the connection between the two.

[0068] The present application also discloses a method for using a disc brake assembly vacuum evacuation circulation oil injection device, comprising the following steps:

[0069] S1. One-time vacuuming: open the vacuum valve and pressure-maintaining valve on the vacuum pipeline 1 and the vacuum pipeline 2, and use the vacuum device to vacuum the upper pump and the lower pump at the same time;

[0070] S2. Leakage detection: Close the vacuum valves on the vacuum pipeline 1 and the vacuum pipeline 2, and detect whether there is leakage in the disc brake assembly;

[0071] S 3. Secondary vacuuming: Open the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2 to perform secondary vacuuming;

[0072] S 4. Oil filling: Close the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2, open the oil filling valve at the lower pump end, and fill the disc brake assembly with brake fluid;

[0073] S 5. Remove residual bubbles: Open the return valve of the oil return line and the oil filling valve of the oil filling line at the same time. The brake oil flows from the lower pump into the upper pump and the brake oil flows back and out from the return line of the upper pump at the same time. The brake oil circulates in the disc brake assembly to remove the bubbles remaining in the disc brake assembly and further remove the residual air.

[0074] S 6. End: First close the oil filling valve on the oil filling pipeline, and then delay closing the suction valve on the oil return pipeline to suck out the excess oil, and the filling is completed.

[0075] By adopting the vacuum pumping and oil filling method and cooperating with the device, the air in the disc brake assembly is ensured to be fully discharged through the steps of primary vacuum pumping, leak detection, secondary vacuum pumping, removal of residual bubbles and termination, and the brake oil can be filled evenly and without bubbles, thereby improving the performance and stability of the disc brake assembly, ensuring the sensitivity and reliability of the brake, and extending the service life of the product.

[0076] Technical personnel should note that: Although the present invention has been described according to the above specific implementation methods, the concept of the present invention is not limited to this invention, and any modification using the concept of the present invention will be included in the scope of protection of this patent right.

Claims

1. A disc brake assembly vacuum circulation oil injection device, comprising an upper pump, a lower pump and a connecting pipeline for connecting the upper pump and the lower pump, characterized in that Also includes: An upper pump filling head connected to the upper pump, wherein an oil return channel and a vacuum channel 1 are provided in the upper pump filling head, wherein the oil return channel is connected to the oil storage device via an oil return pipeline, and the vacuum channel 1 is connected to the vacuum device via a vacuum pipeline 1; A lower pump connector connected to the lower pump, wherein the lower pump connector is provided with an oil injection channel and a second vacuum pumping channel, the oil injection channel is connected to the oil storage device via an oil injection pipeline, and the second vacuum pumping channel is connected to the vacuum pumping device via a second vacuum pumping pipeline; The oil return channel, the oil injection channel, the first vacuum channel and the second vacuum channel are all provided with opening and closing components for controlling the opening and closing of the oil injection channel and the second vacuum channel.

2. The disc brake assembly vacuum cycle oil injection device according to claim 1, characterized in that: The upper pump filling head is provided with a lifting and lateral movement mechanism.

3. The disc brake assembly vacuum cycle oil injection device according to claim 2, characterized in that: The lifting and transverse movement mechanism includes a mounting plate, a transverse movement cylinder fixed on the mounting plate, a cylinder support connected to the output end of the transverse movement cylinder, and a lifting cylinder fixed on the cylinder support, wherein the lifting cylinder is connected to the upper pump filling head.

4. The disc brake assembly vacuum cycle oil injection device according to claim 1, characterized in that: The upper pump filling head is also provided with a surplus oil channel, and an opening and closing component is provided in the surplus oil channel.

5. The disc brake assembly vacuum circulation oil injection device according to claim 1 or 4, characterized in that: The opening and closing assembly includes a pneumatic piston and a plug connected to the pneumatic piston. The pneumatic piston is installed in a piston cavity. An air inlet channel is provided on the piston cavity on both sides of the pneumatic piston.

6. The disc brake assembly vacuum cycle oil injection device according to claim 1, characterized in that: The lower pump connector includes a quick connector, an adapter block connected to the quick connector, and an outer shell sleeved outside the adapter block. The quick connector is provided with an oil filling port. The oil filling channel and the vacuum channel are arranged in the adapter block and are both connected to the oil filling port.

7. The disc brake assembly vacuum cycle oil injection device according to claim 6, characterized in that: The quick connector includes an oil filling core provided with an oil filling port, a sleeve slidably sleeved outside the oil filling core, an opening and closing mechanism for driving the sleeve to move up and down, and a quick connection shell and a quick connection sealing head sleeved on the sleeve. A circle of movable steel balls is provided on the top of the sleeve, and a yielding ring groove and a pressing surface are provided on the inner wall of the quick connection sealing head.

8. The disc brake assembly vacuum cycle oil injection device according to claim 7, characterized in that: The opening and closing mechanism is a piston body fixed on the sleeve, and a piston cavity 2 for installing the piston body is provided in the quick-connect housing, and an air intake channel 2 is provided on the piston cavity 2 located on both sides of the piston body.

9. The disc brake assembly vacuum cycle oil injection device according to claim 7, characterized in that: A sealing groove for installing a sealing ring is provided on the top of the quick-connect sealing head.

10. A method for using a vacuum pumping and oiling device for a disc brake assembly, characterized in that The following steps are involved: S1. One-time vacuuming: open the vacuum valve and pressure-maintaining valve on the vacuum pipeline 1 and the vacuum pipeline 2, and use the vacuum device to vacuum the upper pump and the lower pump at the same time; S2. Leakage detection: Close the vacuum valves on the vacuum pipeline 1 and the vacuum pipeline 2, and detect whether there is leakage in the disc brake assembly; S 3. Secondary vacuuming: Open the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2 to perform secondary vacuuming; S 4. Oil filling: Close the pressure-maintaining valve of vacuum line 1 and the vacuum valve of vacuum line 2, open the oil filling valve at the lower pump end, and fill the disc brake assembly with brake fluid; S 5. Remove residual bubbles: Open the return valve of the oil return line and the oil filling valve of the oil filling line at the same time. The brake oil flows from the lower pump into the upper pump and the brake oil flows back and out from the return line of the upper pump at the same time. The brake oil circulates in the disc brake assembly to remove the bubbles remaining in the disc brake assembly and further remove the residual air. S 6. End: First close the oil filling valve on the oil filling pipeline, and then delay closing the suction valve on the oil return pipeline to suck out the excess oil, and the filling is completed.

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