Brake fluid filling and measuring machine

Abstract

The invention relates to a brake fluid filling and measuring machine. The brake fluid filling and measuring machine comprises a first pipeline and a second pipeline, wherein one end of the first pipeline is provided with a port used for being connected with a pressurized air source; one end of the second pipeline is connected with the vacuum pump; one end of the third pipeline is connected with the brake fluid filling pump; one end of the main pipeline is respectively connected with the other ends of the first pipeline, the second pipeline and the third pipeline; the filling gun is connected with the other end of the main pipeline; and a control device for controlling the vacuum pump and the brake fluid filling pump. The control device is configured so as to be able to perform a pressurized air supply and detection operation in which pressurized air is supplied through the first line and positive pressure fluctuations in the first line are detected, and a vacuum pumping and detection operation in which vacuum pumping is performed through the second line and negative pressure fluctuations in the second line are detected. And a brake fluid filling and detecting operation of filling the brake fluid through the third pipeline and detecting the hydraulic pressure variation in the third pipeline.

Description

Technical Field

[0001] The invention relates to a brake fluid filling and measuring machine. Background Art

[0002] The brake system is an important part of the vehicle. Its functions include: forcing the moving vehicle to slow down or even stop according to the driver's requirements, making the stopped vehicle park stably under various road conditions, and keeping the speed of the vehicle traveling downhill stable. In the past, the brake fluid filling machine used to fill the brake fluid into the vehicle's brake system was used to fill and test the brake fluid of the car that had been assembled on the production line in the production assembly area. Brake fluid filling and testing are carried out on the production line during the mass production stage. It is impossible to test the brake system separately outside the production line, and it can only be done after the vehicle is assembled. It cannot be done during the research and development stage of the brake system. There are no test facilities for brake fluid filling and measurement during the development stage of new vehicles. In addition, the above tests are mainly completed by manual testing on the production line, without objective data records for comparison and analysis, and cannot be analyzed and reported in personal computers or other terminals. Summary of the invention

[0003] The present invention is made in view of the above situation, and its object is to provide a brake fluid filling and measuring machine that can more conveniently and accurately test the sealing performance of a vehicle's brake system.

[0004] In order to achieve the above-mentioned purpose, the brake fluid filling and measuring machine of the present invention includes: a first pipeline, wherein the first pipeline is provided with a port for connecting to a pressurized air source at one end; a second pipeline, wherein one end of the second pipeline is connected to a vacuum pump; a third pipeline, wherein one end of the third pipeline is connected to a brake fluid filling pump; a main pipeline, wherein one end of the main pipeline is respectively connected to the other ends of the first pipeline, the second pipeline and the third pipeline; a filling gun, wherein the filling gun is connected to the other end of the main pipeline; and a control device, wherein the control device controls the vacuum pump and the brake fluid filling pump, and the control device is configured to be able to supply pressurized air through the first pipeline and detect positive pressure changes in the first pipeline. The vacuuming and detection actions of vacuuming through the second pipeline and detecting negative pressure changes in the second pipeline, and the brake fluid filling and detection actions of filling brake fluid through the third pipeline and detecting hydraulic pressure changes in the third pipeline.

[0005] In the above-mentioned brake fluid filling and measuring machine, preferably, the other ends of the first pipeline, the second pipeline and the third pipeline are respectively connected to one end of the main pipeline through a connecting vessel, and the filling gun includes an adapter for connecting to the vehicle's brake system.

[0006] In the above brake fluid filling and measuring machine, preferably, when the pressurized air supply and detection operation is performed, pressurized air flows into the brake system via the first pipeline, the main pipeline and the filling gun.

[0007] In the above-mentioned brake fluid filling and measuring machine, preferably, when performing the vacuuming and detection action, the air in the brake system is discharged to the outside through the filling gun, the main pipeline and the second pipeline, so that the interior of the brake system is in a vacuum state.

[0008] In the above brake fluid filling and measuring machine, preferably, when the brake fluid filling and measuring operation is performed, the brake fluid flows from the fluid reservoir into the brake system via the third pipe, the main pipe and the filling gun.

[0009] In the above-mentioned brake fluid filling and measuring machine, it is preferred that a positive pressure gauge is provided in the first pipeline, a negative pressure gauge is provided in the second pipeline, and a hydraulic pressure gauge is provided in the third pipeline, and the control device determines whether there is a leak in the vehicle's braking system based on the changes in the detection values ​​of the positive pressure gauge, the negative pressure gauge and the hydraulic pressure gauge within a certain period of time.

[0010] In the above-mentioned brake fluid filling and measuring machine, preferably, the brake fluid filling and measuring machine further includes a shell, and the shell internally accommodates the first pipeline, the second pipeline, the third pipeline, the vacuum pump and the brake fluid filling pump.

[0011] In the above brake fluid filling and measuring machine, preferably, the other end of the main pipe extends from the housing and is connected to the filling gun.

[0012] In the above brake fluid filling and measuring machine, preferably, a touch screen for user operation is provided on the front surface of the housing.

[0013] In the above brake fluid filling and measuring machine, it is preferable that the brake fluid filling and measuring machine is configured to be movable by a rolling wheel provided on the bottom of the housing.

[0014] The brake fluid filling and measuring machine according to the present invention can test the sealing performance of the brake system of a vehicle more conveniently and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a perspective view schematically showing the general overall structure of a brake fluid filling and measuring machine according to one embodiment of the present invention.

[0016] Figure 2 This is a front view schematically showing the general overall structure of a brake fluid filling and measuring machine according to one embodiment of the present invention.

[0017] Figure 3 This is a diagram schematically showing a general internal structure of a brake fluid filling and measuring machine according to one embodiment of the present invention.

[0018] Figure 4 This is a schematic layout diagram schematically showing a brake fluid filling and measuring machine according to one embodiment of the present invention.

[0019] Figure 5 This is a schematic layout diagram of a brake fluid filling and measuring machine according to an embodiment of the present invention, as viewed from the rear side.

[0020] Figure 6 This is a diagram schematically showing a general configuration of a filling gun provided in a brake fluid filling and measuring machine according to an embodiment of the present invention.

[0021] Figure 7 This is a diagram schematically showing an example of a test flow. DETAILED DESCRIPTION

[0022] The present disclosure will be described below with reference to the accompanying drawings. It should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below. In fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0023] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for the sake of clarity, the size and shape of certain features may be appropriately deformed. In addition, the drawings are schematic diagrams showing the general structure of the brake fluid filling and measuring machine involved in the present disclosure, and the brake fluid filling and measuring machine involved in the present disclosure is not limited to the structure shown in the drawings.

[0024] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0025] Below, refer to Figures 1 to 7, a brake fluid filling and measuring machine according to one embodiment of the present invention is described. It should be noted that in the following drawings, the same or similar parts are marked with the same or similar reference numerals. However, the drawings are schematic, and attention should be paid to the situation where the ratios of various dimensions are different from the actual situation. Therefore, the specific dimensions should be judged with reference to the following description. In addition, the drawings may also include parts with different dimensional relationships or ratios.

[0026] The brake fluid filling and measuring machine 1 comprises: a first pipeline, the first pipeline having a port for connecting to a pressurized air source at one end; a second pipeline, one end of which is connected to a vacuum pump 2; a third pipeline, one end of which is connected to a brake fluid filling pump 3; a main pipeline 14, one end of which is connected to the other ends of the first pipeline, the second pipeline and the third pipeline respectively; and a filling gun 4, the filling gun 4 is connected to the other end of the main pipeline 14. The first pipeline is for pressurized air to circulate, the second pipeline is for air in the vehicle's brake system to circulate, the third pipeline is for brake fluid to circulate, and the main pipeline 14 is for pressurized air, air in the vehicle's brake system and brake fluid to circulate.

[0027] In the present invention, the pressurized air source can be arranged inside the brake fluid filling and measuring machine 1, or can be arranged separately from the brake fluid filling and measuring machine 1 and connected to the brake fluid filling and measuring machine 1 through the air pipe 18 (see Figure 5 ) is connected to a port of the above-mentioned first pipeline so as to supply pressurized air from a pressurized air source to the first pipeline.

[0028] The brake fluid filling and measuring machine 1 also includes a control device for controlling the vacuum pump 2 and the brake fluid filling pump 3. The control device can be composed of, for example, a computer having a processor, memory, storage, I / O, etc. As the computer, for example, a general-purpose personal computer can be used, and an embedded computer or a PLC (programmable logic controller) can also be used.

[0029] Therefore, according to the brake fluid filling and measuring machine 1 of the present invention, the sealing performance of the brake system of the vehicle can be tested more conveniently and accurately.

[0030] In the brake fluid filling and measuring machine 1, the control device is constructed to be able to perform pressurized air supply and detection actions of supplying pressurized air through a first pipeline and detecting positive pressure changes in the first pipeline, vacuuming and detection actions of vacuuming through a second pipeline and detecting negative pressure changes in the second pipeline, and brake fluid filling and detection actions of filling brake fluid through a third pipeline and detecting hydraulic pressure changes in the third pipeline.

[0031] The above-mentioned pressurized air supply and detection action, vacuuming and detection action, and brake fluid filling and detection action can be completed independently or jointly. More specifically, in the present invention, through the control of the control device, the brake fluid filling and measuring machine 1 can perform the following actions: pressurized air supply and detection action, vacuuming and detection action, brake fluid filling and detection action, pressurized air supply and detection action + vacuuming and detection action, vacuuming and detection action + brake fluid filling and detection action, pressurized air supply and detection action + vacuuming and detection action + brake fluid filling and detection action, etc. The above-mentioned actions are merely illustrative and are not limited thereto.

[0032] Figure 7 An example of the test flow is schematically shown in FIG. Figure 7 In the figure, the horizontal axis represents time and the vertical axis represents pressure / vacuum. Figure 7 The three straight lines on the left side of the figure show the approximate changes in the positive pressure in the first pipeline during the pressurized air supply and detection operation, the two straight lines in the middle show the approximate changes in the negative pressure in the second pipeline during the vacuuming and detection operation, and the three straight lines on the right side show the approximate changes in the hydraulic pressure in the third pipeline during the brake fluid filling and detection operation. Although the figure uses straight lines to show pressure changes, this is only for the convenience of explanation and does not represent the actual pressure changes.

[0033] In the brake fluid filling and measuring machine 1, the other ends of the first pipeline, the second pipeline and the third pipeline are connected to one end of the main pipeline 14 through a connecting vessel, and the filling gun 4 includes an adapter for connecting to the brake system of the vehicle. Since the filling gun 4 includes an adapter for connecting to the brake system of the vehicle, it can be conveniently connected to the brake systems of different models without replacing the filling gun, and has good versatility.

[0034] In the brake fluid filling and measuring machine 1, when performing pressurized air supply and detection operations, one end of the first pipeline is connected to the pressurized air source, and the pressurized air from the pressurized air source flows into the brake system via the first pipeline, the main pipeline 14 and the filling gun 4. When the positive pressure of the pressurized air in the first pipeline reaches a certain value, the first pipeline is disconnected from the pressurized air source and the supply of pressurized air is stopped. At this time, the first pipeline maintains a connected state with the brake system. Based on the change in the positive pressure of the pressurized air in the first pipeline after the supply of pressurized air is stopped, it is determined whether there is a leak in the brake system. More specifically, the positive pressure change value of the pressurized air within a certain period of time is compared with the positive pressure judgment threshold. When the positive pressure change value is below the positive pressure judgment threshold, it is determined that the brake system has good sealing and no leakage. The above-mentioned certain value of pressurized air can be set to, for example, about 2 to 5 atmospheres, but it is not limited to this and can be set according to actual needs. In addition, if Figure 7 As shown, the Figure 7 The certain time shown in the positive pressure holding time is about 30 seconds, but this is only an example and is not limited to this, and can be set according to actual needs. In addition, the positive pressure determination threshold value can also be set according to actual needs.

[0035] In addition, in the brake fluid filling and measuring machine 1, when performing vacuuming and detection actions, the vacuum pump 2 is operated, and the air in the brake system is discharged to the outside through the filling gun 4, the main pipeline 14 and the second pipeline, so that the interior of the brake system becomes a vacuum state. When the negative pressure of the pressurized air in the second pipeline reaches a certain value, the vacuum pump 2 is stopped, and based on the change in negative pressure in the second pipeline after stopping, it is determined whether there is a leak in the brake system. More specifically, the negative pressure change value within a certain period of time is compared with the negative pressure judgment threshold. When the negative pressure change value is below the negative pressure judgment threshold, it is determined that the brake system has good sealing and no leakage. Similar to the case of positive pressure, the above-mentioned certain value of negative pressure, certain time, that is, the negative pressure holding time and the negative pressure judgment threshold can also be set according to actual needs.

[0036] In addition, in the brake fluid filling and measuring machine 1, when the brake fluid filling and detection action is performed, the brake fluid filling pump 3 is operated, and the brake fluid flows from the reservoir 17 through the third pipeline, the main pipeline 14 and the filling gun 4 into the brake system. When the hydraulic pressure in the third pipeline reaches a certain value, the brake fluid filling pump 3 is stopped, the supply of the brake fluid is stopped, and based on the hydraulic pressure change of the brake fluid in the third pipeline after the supply of the brake fluid is stopped, it is determined whether there is a leak in the brake system. More specifically, the hydraulic pressure change value of the brake fluid within a certain period of time is compared with the hydraulic pressure determination threshold. When the hydraulic pressure change value is below the hydraulic pressure determination threshold, it is determined that the brake system has good sealing and no leakage. Similar to the case of positive pressure, the above-mentioned certain value of hydraulic pressure, the certain time, that is, the hydraulic pressure holding time and the hydraulic pressure determination threshold can also be set according to actual needs.

[0037] In the brake fluid filling and measuring machine 1, a positive pressure gauge 5 is provided in the first pipeline, a negative pressure gauge 6 is provided in the second pipeline, and a hydraulic pressure gauge 7 is provided in the third pipeline. It can also be configured so that the detection values ​​of the above-mentioned pressure gauges can be converted into electrical signals and sent to the control device, and the control device can determine whether there is a leak in the brake system based on the changes in the detection values ​​of the positive pressure gauge 5, the negative pressure gauge 6 and the hydraulic pressure gauge 7 within a certain period of time.

[0038] The brake fluid filling and measuring machine 1 further comprises a housing 8, wherein the housing 8 accommodates the first pipeline, the second pipeline, the third pipeline, the vacuum pump 2 and the brake fluid filling pump 3. Figure 1 and Figure 2As shown, the other end of the main pipe 14 extends out from the housing 8 and is connected to the filling gun 4 .

[0039] Although the other ends of the first, second and third pipelines are connected to the filling gun 4 via the main pipeline 14 in the above embodiment, the present invention is not limited to this structure and the first, second and third pipelines may also be connected to the filling gun 4 .

[0040] In the brake fluid filling and measuring machine 1, as Figure 1 and Figure 2 As shown, a touch screen 9 for user operation is provided on the front surface of the housing 8. The touch screen 9 is connected to the control device, and the user can use the touch screen to set various parameters such as the above-mentioned certain value, certain time, judgment threshold, etc., and various actions such as the above-mentioned. The touch screen 9 can also display the detection values ​​of the positive pressure gauge 5, the negative pressure gauge 6 and the hydraulic pressure gauge 7.

[0041] In addition, if Figure 1 and Figure 2 As shown, various operation buttons 15 are provided below the touch screen 9, and the user can also perform various actions as described above manually. The arrangement positions of the buttons shown in the figure are only examples and are not limited thereto.

[0042] In addition, if Figure 1 and Figure 2 As shown, the user can also conveniently observe the changes of the positive pressure gauge 5, the negative pressure gauge 6 and the hydraulic pressure gauge 7 from the outside of the brake fluid filling and measuring machine 1 and read the detection values.

[0043] The brake fluid filling and measuring machine 1 can also be configured to be connected to an external terminal such as a personal computer (PC) via the interface 16 or wirelessly. The user can control the brake fluid filling and measuring machine 1 through an external personal computer to make it perform the actions described above. In addition, the various actions performed by the brake fluid filling and measuring machine 1 can also be displayed in real time on the external personal computer, and a test report can be generated that includes, for example, the actions performed by the brake fluid filling and measuring machine 1, various parameters related to the actions, a chart of the pressure value changes over time related to the actions, and judgment results. In addition, Figure 7 An example of a test flow schematically shown in Figure 7 In addition to being displayed on an external personal computer, the graph shown can also be converted into a table and displayed.

[0044] In addition, if Figure 1 and Figure 2As shown, the brake fluid filling and measuring machine 1 may also be configured to be movable by means of a rolling wheel 10 provided at the bottom of the housing 8. Thus, the brake fluid filling and measuring machine 1 can be easily moved to a desired position.

[0045] exist Figure 4 , a schematic diagram of the general layout of a brake fluid filling and measuring machine 1 according to an embodiment of the present invention is shown. Figure 4 , four simulated wheels placed on a testing platform 12 are schematically shown, and a brake fluid filling and measuring machine 1 is arranged near the testing platform 12 .

[0046] In addition, the brake fluid filling and measuring machine 1 can also be connected to the vacuum booster via a one-way valve to test the vacuum tightness of the vacuum booster.

[0047] According to the present invention, the sealing of the vehicle's brake system can be tested more conveniently and accurately. In addition, the step-by-step and joint control of positive pressure, negative pressure, i.e., vacuum, and brake fluid filling functions can be achieved. It can not only be used for filling and measuring the entire vehicle, but can also be used alone for development verification and leakage measurement of the brake system. In addition, the brake fluid filling and measurement process can be analyzed and a test report can be generated in a PC or PLC and other terminals. In addition, multi-platform vehicle compatibility can be achieved, and there is no need to replace the brake fluid filling and measuring machine body, saving costs. In addition, it occupies a small area and is easy to move. In addition, the test program can be upgraded and expanded to achieve more measurement requirements.

[0048] The exemplary embodiments of the present invention are described above, but it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention in essence. Therefore, all changes and modifications are included in the scope of protection of the present invention as defined by the claims. The present invention is defined by the claims, and equivalents to the technical solutions of the claims are also included.

Claims

1. A brake fluid filling and measuring machine, characterized in that: The brake fluid filling and measuring machine comprises: a first conduit, the first conduit being provided at one end with a port for connection to a pressurized air source; a second pipeline, one end of which is connected to a vacuum pump; a third pipeline, one end of which is connected to the brake fluid filling pump; A main pipeline, one end of which is connected to the other ends of the first pipeline, the second pipeline and the third pipeline respectively; a filling gun connected to the other end of the main pipe; and a control device, wherein the control device controls the vacuum pump and the brake fluid filling pump, The control device is configured to supply pressurized air through the first pipeline and detect positive pressure changes in the first pipeline, vacuumize and detect negative pressure changes in the second pipeline, and fill brake fluid through the third pipeline and detect hydraulic pressure changes in the third pipeline.

2. The brake fluid filling and measuring machine according to claim 1, characterized in that: The other ends of the first pipeline, the second pipeline and the third pipeline are connected to one end of the main pipeline through a connecting vessel. The filling gun comprises an adapter for connection to a brake system of a vehicle.

3. The brake fluid filling and measuring machine according to claim 1 or 2, characterized in that: When the pressurized air supply and detection operation is performed, the pressurized air flows into the brake system via the first pipeline, the main pipeline, and the filling gun.

4. The brake fluid filling and measuring machine according to claim 1 or 2, characterized in that: When the vacuuming and detecting actions are performed, the air in the brake system is discharged to the outside through the filling gun, the main pipeline and the second pipeline, so that the interior of the brake system is in a vacuum state.

5. The brake fluid filling and measuring machine according to claim 1 or 2, characterized in that: When the brake fluid filling and testing operation is performed, the brake fluid flows from the fluid storage tank into the brake system via the third pipeline, the main pipeline and the filling gun.

6. The brake fluid filling and measuring machine according to claim 1 or 2, characterized in that: A positive pressure gauge is provided in the first pipeline, a negative pressure gauge is provided in the second pipeline, and a hydraulic pressure gauge is provided in the third pipeline. The control device determines whether there is a leak in the brake system of the vehicle based on changes in the detection values ​​of the positive pressure gauge, the negative pressure gauge, and the hydraulic pressure gauge within a certain period of time.

7. The brake fluid filling and measuring machine according to claim 1 or 2, characterized in that: The brake fluid filling and measuring machine further includes a housing, and the housing internally accommodates the first pipeline, the second pipeline, the third pipeline, the vacuum pump, and the brake fluid filling pump.

8. The brake fluid filling and measuring machine according to claim 7, characterized in that: The other end of the main pipe extends out from the housing and is connected to the filling gun.

9. The brake fluid filling and measuring machine according to claim 7, characterized in that: A touch screen for user operation is arranged on the front surface of the housing.

10. The brake fluid filling and measuring machine according to claim 7, characterized in that: The brake fluid filling and measuring mechanism is configured to be movable via a rolling wheel provided at the bottom of the housing.

Images