CN112556941A - Air tightness detection device and detection method for clutch main cylinder assembly - Google Patents
Air tightness detection device and detection method for clutch main cylinder assembly Download PDFInfo
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- 238000000034 method Methods 0.000 claims description 10
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- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
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Abstract
The invention discloses an air tightness detection device and a detection method of a clutch master cylinder assembly, and belongs to the technical field of air tightness detection of clutch master cylinder assemblies.
Description
Technical Field
The invention relates to the technical field of air tightness detection of a clutch main cylinder assembly, in particular to an air tightness detection device and method of the clutch main cylinder assembly.
Background
The clutch master cylinder is the main part forming the clutch, and the poor air tightness of the master cylinder can cause various problems of failure, abnormal operation, reduced efficiency, shortened service life, environmental pollution and the like of the clutch in the use process. Therefore, the master cylinder needs to be checked for airtightness before shipping. The technical level of air tightness detection directly affects the production efficiency, the labor intensity of operators and the final quality of products.
The clutch pedal can not normally return in the after-sale market of the automobile, and after inspection, part of automobile models are caused by the damage of a main sealing ring of a clutch main cylinder assembly and the pressure reduction of a clutch pipeline; in other vehicles, the troubleshooting process and problem locking are relatively complicated due to other faults such as a clutch pedal, a clutch pipeline, a hydraulic release bearing and the like. The damage of the main seal ring of the clutch master cylinder cannot be directly observed from the appearance, the damage degree of the auxiliary seal ring is small, sometimes the auxiliary seal ring cannot be observed from the appearance, the air tightness detection is needed, after-sales service stations cannot identify the suspected faulty clutch master cylinder due to the fact that special air tightness detection equipment is not available and the problem troubleshooting complexity is avoided, the after-sales service stations often cause the phenomenon that a clutch pedal cannot normally return to the original position to be attributed to the damage of the main seal ring of the clutch master cylinder, and the clutch master cylinder assembly is directly replaced. This approach not only does not solve the problem fundamentally but also increases the after-market costs. If the fault part is returned to the manufacturer for fault analysis, the period of problem solution can be greatly prolonged due to the link requirements of part returning process, manufacturer fault part detection and the like. In order to improve the working efficiency, reduce the misjudgment of the problem and fundamentally solve the problem, it is important to have a simple air tightness detection device of the clutch main cylinder assembly.
Disclosure of Invention
In order to solve the technical problems, the invention provides the air tightness detection device of the clutch main cylinder assembly, which has the advantages of simple structure and processing technology, low manufacturing cost, convenience in carrying and air tightness detection, and can shorten the period of air tightness detection, reduce the misjudgment rate of products and improve the working efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the air tightness detection device of the clutch main cylinder assembly comprises a main cylinder body, a piston and a push rod, an oil inlet and an oil outlet are respectively arranged at one side and the end part of the main cylinder body, a piston is connected in the main cylinder body in a sliding way, the outer peripheral directions of the two ends of the piston are respectively sleeved with a main sealing ring and an auxiliary sealing ring, the end part of the piston is connected with the push rod, the push rod extends out of the main cylinder body, the detection device comprises a fixed bracket, an adjusting and positioning component, an inflator pump and an air pipe, one end of the fixed bracket is connected with an adjusting and positioning component which can adjust the length of the fixed bracket, the other end of the fixed support is fixedly connected with the middle of the main cylinder body, the push rod extends into the fixed support and then is detachably connected with the adjusting and positioning assembly, and the oil outlet is connected with the inflator pump through an air pipe.
Furthermore, the fixed bolster includes U-shaped support frame and connecting screw, the both ends of U-shaped support frame are provided with the multiunit connecting hole respectively relatively, pass connecting screw between two relative connecting holes, threaded connection has set nut I on the connecting screw at connecting hole both ends.
Furthermore, one end of the U-shaped supporting frame is connected with the main cylinder body in a positioning mode, and the other end of the U-shaped supporting frame is connected with the adjusting and positioning assembly.
Furthermore, a positioning hole I and a positioning hole II are formed in the middle of one end of the U-shaped support frame, a flange plate is arranged in the middle of the main cylinder body, the main cylinder body is sleeved in the positioning hole I, the flange plate is attached to one end of the U-shaped support frame, and the flange plate is connected with the positioning hole II through a plurality of bolt positioning assemblies.
Furthermore, a positioning hole III is formed in the middle of the other end of the U-shaped supporting frame and connected with the adjusting and positioning assembly.
Furthermore, the adjusting and positioning assembly comprises an adjusting screw rod, a push rod fork and a pin shaft, one end of the adjusting screw rod penetrates through the positioning hole III and then is in threaded connection with the push rod fork, positioning nuts II are in threaded connection with the adjusting screw rods at two ends of the positioning hole III, and the end part of the push rod fork is connected with the push rod through the pin shaft.
Further, the push rod fork is set to be a U-shaped mounting frame, the middle of the push rod fork is in threaded connection with the adjusting screw, mounting holes are formed in two sides of the opening end of the push rod fork relatively, the push rod is inserted into the opening end of the push rod fork and enables a through hole in the push rod to be opposite to the mounting holes, and the pin shaft penetrates through the through hole and the mounting holes and then is connected with the split retainer ring in a positioning mode.
The air tightness detection method of the clutch master cylinder assembly utilizes the air tightness detection device and comprises the following steps:
1) installing and positioning a clutch master cylinder assembly on a fixed bracket;
2) adjusting an adjusting screw rod to pull a push rod to enable the push rod to be located on the right side of the top dead center of the main cylinder body, and connecting the oil outlet with an inflation pump through an air pipe;
3) blocking an outer side end port of the oil inlet, putting the clutch main cylinder assembly and the fixing support with the well adjusted positions into a water tank, starting the inflator pump to enable gas to enter the main cylinder body, and observing the position condition of the bubbles in the water tank to judge the air tightness of the auxiliary sealing ring and the main cylinder body;
4) taking out a fixed support provided with a clutch master cylinder assembly from water, opening an outer side port of an oil inlet, pulling out an air pipe, adjusting an adjusting screw rod to push a push rod to enable the push rod to be positioned at an upper dead point, a lower dead point and any position between the upper dead point and the lower dead point of a master cylinder body, and connecting an oil outlet with an inflation pump through the air pipe;
5) and (3) placing the clutch main cylinder assembly and the fixing support with the well-adjusted positions into a water tank, starting the inflator pump to enable gas to enter the main cylinder body, and observing the position condition of the bubbles in the water tank to judge the air tightness of the main seal ring and the main cylinder body.
Further, this internal cavity I and cavity II that are linked together that are provided with of master cylinder, the oil-out pass through cavity I with cavity II is linked together, the internal diameter of cavity I is less than the internal diameter of cavity II, cavity I and II sliding connection of cavity have the piston, main sealing washer and vice sealing washer are established to the peripheral direction at the both ends of piston cover respectively, main sealing washer is in slide in cavity I, vice sealing washer is in slide in cavity II, the rear end of cavity I with the medial extremity mouth of oil inlet communicates with each other.
Furthermore, the position of a top dead center of the main cylinder body is that a main sealing ring is positioned at the rear end of the cavity I, the inner side of the oil inlet is blocked by the main sealing ring, and an auxiliary sealing ring is positioned at the rear end of the cavity II; the position of the lower dead point of the main cylinder body is that the main sealing ring is positioned at the front end of the cavity I, the auxiliary sealing ring is positioned at the front end of the cavity II, and the inner side of the oil inlet is communicated with the cavity I; the position between the upper dead point and the lower dead point of the main cylinder body is the position where the main sealing ring is located at the front end and the rear end of the cavity I.
The invention has the beneficial effects that:
1. the invention designs an air tightness detection device according to the structure and the working principle of a clutch main cylinder assembly, which consists of a fixed support, an adjusting and positioning component, an inflator pump and an air pipe, wherein the integral structure is simple, the processing cost is low, one end of the fixed support is used for positioning a main cylinder body in the clutch main cylinder assembly, a push rod in the main cylinder body is connected with the adjusting and positioning component at the other end of the fixed support, the push rod and a piston in the main cylinder body can be positioned at different positions of the main cylinder body by adjusting the adjusting and positioning component, an oil outlet of the clutch main cylinder assembly is connected with the inflator pump through the air pipe, the piston is pushed to different positions of the main cylinder body according to the flow direction of an oil way in the main cylinder body, the fixed support provided with the clutch main cylinder assembly is placed in a water tank, gas enters the main cylinder body from the oil outlet by starting the inflator pump, and the position condition of bubbling in the water tank is observed to judge an The air tightness of the body and the whole detection method are simple and convenient to operate, the tightness detection of the clutch main cylinder assembly can be completed quickly, the detection accuracy is high, the detection is more comprehensive, the working efficiency is improved, and the maintenance cost of a user is reduced.
2. Furthermore, the adjusting and positioning component comprises an adjusting screw rod, a push rod fork and a pin shaft, the adjusting screw rod penetrates through a positioning hole III of the U-shaped support frame and then is in threaded connection with the push rod fork, the push rod fork is connected with the end part of the push rod through the pin shaft, the length of the push rod extending into the U-shaped support frame can be adjusted by pushing and pulling the adjusting screw rod, so that the positions of the push rod and the piston in the main cylinder body can be quickly adjusted, and the adjusting stroke can be increased by adjusting the length of the end part of the adjusting screw rod screwed into the push rod fork, so that the adjusting device is suitable for adjusting the air tightness detection of clutch main cylinder assemblies of different models and sizes, after the adjustment is completed, two positioning nuts II are arranged on the adjusting screw rods at the two ends of the positioning hole III, so that the positioning of the adjusting screw rod is realized, the position adjustment and the positioning of the piston in the clutch main, the detection of the air tightness is more comprehensive.
To sum up, this gas tightness detection device overall structure and processing technology are simple, the cost of manufacture is low, convenient to carry, and the gas tightness detects conveniently, comprehensively, has shortened the cycle that the gas tightness detected, has reduced the erroneous judgement rate of product, has improved work efficiency, has reduced user's cost of maintenance.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the fixing bracket and the adjusting and positioning assembly shown in FIG. 1;
FIG. 3 is a schematic structural view of the push rod of the present invention at a top dead center position of the main cylinder body;
FIG. 4 is a schematic structural view of the push rod of the present invention at a bottom dead center position of the master cylinder body;
the labels in the above figures are: 1. the clutch master cylinder assembly comprises a clutch master cylinder assembly 11, a master cylinder body 111, a chamber I, a chamber II, a chamber 12, a piston 13, a push rod 14, an oil inlet 15, an oil outlet 16, a main sealing ring 17, an auxiliary sealing ring 18, a flange plate 2, a fixing support 21, a U-shaped support frame 211, a positioning hole I, a positioning hole II, a positioning hole 213, a positioning hole III, a connecting screw rod 22, a positioning nut I, a positioning nut 3, an adjusting positioning assembly 31, an adjusting screw rod 31, a push rod fork 32, a mounting hole 321, a pin shaft 33, a positioning nut II, an opening retainer ring 35, an inflation pump 4 and an air pipe 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation scheme of the invention is as follows: the invention solves the problem of air tightness detection of a clutch master cylinder assembly, as shown in fig. 3 and 4, a clutch master cylinder assembly 1 comprises a master cylinder body 11, a piston 12 and a push rod 13, an oil inlet 14 and an oil outlet 15 are respectively arranged at one side and one end of the master cylinder body 11, a cavity I111 and a cavity II 112 communicated with each other are arranged in the master cylinder body 11, the oil outlet 15 is communicated with the cavity II 112 through the cavity I111, the inner diameter of the cavity I111 is smaller than that of the cavity II 112, the cavity I111 and the cavity II 112 are connected with the piston 12 in a sliding manner, a main sealing ring 16 and an auxiliary sealing ring 17 are respectively sleeved at the peripheral direction of two ends of the piston 12, the main sealing ring 16 slides in the cavity I111, the auxiliary sealing ring 17 slides in the cavity II 112, the rear end of the cavity I111 is communicated with an inner side port of the oil inlet 14, the end of the piston 12, the main cylinder body 11 comprises two dead center positions including a top dead center and a bottom dead center, wherein the top dead center position is that the main sealing ring 16 is positioned at the rear end of the cavity I111, the main sealing ring 16 blocks the inner side of the oil inlet 14, and the auxiliary sealing ring 17 is positioned at the rear end of the cavity II 112; the lower dead point is that the main sealing ring 16 is located at the front end of the cavity I111, the auxiliary sealing ring 17 is located at the front end of the cavity II 112, but the inner side of the oil inlet 14 is communicated with the cavity I111, and the auxiliary sealing ring 17 does not block the inner side of the oil inlet 14.
As shown in figure 1, the detection device designed according to the structure of the clutch master cylinder assembly 1 comprises a fixed support 2, an adjusting and positioning component 3, an inflator pump 4 and an air pipe 5, the whole structure is simple, the processing cost is low, one end of the fixed support 2 is connected with the adjusting and positioning component 3 which can adjust the length of the fixed support 2, the other end of the fixed support 2 is fixedly connected with the middle part of a master cylinder body 11, a push rod 13 extends into the fixed support 2 and is detachably connected with the adjusting and positioning component 3, an oil outlet 15 is connected with the inflator pump 4 through the air pipe 5, one end of the fixed support 2 is used for positioning the master cylinder body 11, the push rod 13 in the master cylinder body 11 is connected with the adjusting and positioning component 3 at the other end of the fixed support 2, the push rod 13 and the piston 12 in the master cylinder body 11 can be positioned at different positions by adjusting and positioning component 3, the oil outlet 15 is connected with the inflator pump 4 through the air pipe 5, the piston 12 is pushed to different positions of the main cylinder body 11 according to the flow direction of an oil path in the main cylinder body 11, the fixing support 2 for mounting the clutch main cylinder assembly 1 is placed into the water tank, gas enters the main cylinder body 11 from the oil outlet 15 by starting the inflator pump 4, and the air tightness of the inner sealing ring of the clutch main cylinder assembly and the main cylinder body is judged by observing the position condition of the bubble emission in the water tank.
Specifically, as shown in fig. 1 and fig. 2, wherein the fixing bracket 2 includes a U-shaped support frame 21 and a connecting screw rod 22, two ends of the U-shaped support frame 21 are respectively and relatively provided with a plurality of groups of connecting holes, the connecting screw rod 22 passes through the connecting screw rod 22 between two opposite connecting holes, the connecting screw rod 22 at two ends of the connecting holes is connected with a positioning nut i 23 in a threaded manner, the connecting screw rod 22 is positioned on the U-shaped support frame 21 through the positioning nut i 23 after connecting two ends of the U-shaped support frame 21, the whole fixing bracket 2 is simple in structure, the processed products are convenient to manufacture, the fixing bracket 2 is simple and convenient to install and detach, and the overall strength and stability of the fixing bracket 2.
One end of the U-shaped support frame 21 is connected with the main cylinder body 11 in a positioning mode, specifically, a positioning hole I211 and a positioning hole II 212 are arranged in the middle of one end of the U-shaped support frame 21, a flange plate 18 is arranged in the middle of the main cylinder body 11, the main cylinder body 11 is sleeved in the positioning hole I211, the flange plate 18 is attached to one end of the U-shaped support frame 21, the flange plate 18 is connected with the positioning hole II 212 through a plurality of bolt positioning assemblies, and therefore installation and positioning of the main cylinder body 11 are achieved.
The middle part of the other end of the U-shaped support frame 21 is provided with a positioning hole III 213, the positioning hole III 213 is connected with an adjusting and positioning component 3, concretely, the adjusting and positioning component 3 comprises an adjusting screw rod 31, a push rod fork 32 and a pin shaft 33, one end of the adjusting screw rod 31 penetrates through the positioning hole III 213 and then is in threaded connection with the push rod fork 32, positioning nuts II 34 are in threaded connection with the adjusting screw rods 31 at the two ends of the positioning hole III 213, the end part of the push rod fork 32 is connected with a push rod 13 through the pin shaft 33, the length of the adjusting screw rod 31 extending into the U-shaped support frame 21 can be adjusted by pushing and pulling the adjusting screw rod 31, so that the positions of the push rod 13 and a piston 12 in a main cylinder body 11 can be quickly adjusted, the adjusting stroke can be increased by adjusting the length of the end part of the adjusting screw rod 31 screwed into the push rod, after the adjustment is completed, the two positioning nuts II 34 are arranged on the adjusting screw rods 31 at the two ends of the positioning hole III 213, so that the positioning of the adjusting screw rods 31 is realized, the position adjustment and the positioning of the piston in the clutch master cylinder assembly are quicker, the air tightness of the piston at different positions can be judged, and the detection of the air tightness is more comprehensive.
The push rod fork 32 is arranged to be a U-shaped mounting frame, the middle of the push rod fork 32 is in threaded connection with the adjusting screw 31, mounting holes 321 are oppositely formed in two sides of the opening end of the push rod fork 32, the push rod 13 is inserted into the opening end of the push rod fork 32, the through hole in the push rod 13 is opposite to the mounting holes 321, the pin shaft 33 is located and connected with the split retainer ring 35 after penetrating through the through hole and the mounting holes 321, and the push rod 13 is more convenient and faster to mount and locate.
In addition, as the whole detection device is placed in the water tank, all parts in the detection device need to be subjected to rust prevention treatment in order to improve the detection accuracy and prolong the service life of the device; the quick-plug connector is arranged at the position where the air pipe 5 is connected with the oil outlet 15, so that the air pipe 5 is more convenient and quicker to detach and install; the end of the adjusting screw 31 is welded with a round tube perpendicular to the adjusting screw, so that the holding operation is convenient.
The method for detecting the air tightness of the clutch master cylinder assembly by using the air tightness detection device comprises the following steps:
1) the clutch master cylinder assembly 1 is installed and positioned on the fixing support 2, specifically, the master cylinder body 11 is sleeved in a positioning hole I211 at one end of the U-shaped support frame 21, the flange plate 18 is attached to one end of the U-shaped support frame 21, and the flange plate 18 is connected with a positioning hole II 212 through a plurality of bolt positioning components.
2) The adjusting screw rod 31 is adjusted to pull the push rod 13 to be located on the right side of the top dead center of the main cylinder body 11, namely, the length of the adjusting screw rod 31 extending into the U-shaped support frame 21 is shortened by adjusting the position of the adjusting screw rod 31 at the other end of the U-shaped support frame 21 or adjusting the length of the end portion of the adjusting screw rod 31 extending into the push rod fork 32, so that the push rod 13 is pulled to enable the main sealing ring 16 to be located in the cavity II 112, the main sealing ring 16 cannot play a sealing role, and the oil outlet 15 is connected with the inflator 4 through the air pipe 5.
3) The outer side end opening of the oil inlet 14 is blocked by a sealing piece, the clutch main cylinder assembly 1 and the fixing support 2 which are adjusted in position are placed in a water tank, the inflator pump 4 is started, gas enters the main cylinder body 11 through the air pipe 5, the gas can only enter the cavity II 112 from the cavity I111 because the outer side end opening of the oil inlet 14 is blocked, the main sealing ring 16 does not work in the cavity II 112, only the auxiliary sealing ring 17 plays a sealing role, and the airtightness of the auxiliary sealing ring 17 and the main cylinder body 11 is judged by observing the position condition of bubble emergence in the water tank, namely if the opening end of the main cylinder body 11 has bubble emergence, the auxiliary sealing ring 17 is damaged, and if the opening end of the main cylinder body 11 has no bubble emergence, the auxiliary sealing ring 17 is not damaged; if the air bubbles are blown out from the outer periphery of the master cylinder body 11, it is explained that the master cylinder body 11 is broken. The method for detecting the air tightness of the secondary seal ring 17 is suitable for detecting the air tightness of the secondary seal ring 17 when the damage degree of the secondary seal ring 17 is very small and the oil leakage condition at the opening end of the main cylinder body 11 cannot be directly judged, and the oil leakage condition at the opening end of the main cylinder body 11 is relatively serious, so that the air tightness of the secondary seal ring 17 does not need to be detected by the method, and only the tightness of the main seal ring 16 and the main cylinder body 11 needs to be detected, and the specific detection method is as follows.
4) After the air tightness detection of the auxiliary sealing ring 17 is finished, the fixing support 2 provided with the clutch master cylinder assembly 1 is taken out of water, an outer end opening of the oil inlet 14 is opened, the air pipe 5 is pulled out, the adjusting screw 31 is adjusted to push the push rod 13 to be positioned at the upper dead point, the lower dead point and any position between the upper dead point and the lower dead point of the master cylinder body 11, and the oil outlet 15 is connected with the inflator pump 4 through the air pipe 5;
5) the clutch main cylinder assembly 1 and the fixing support 2 which are well adjusted are placed in a water tank, an inflator pump 4 is started to enable gas to enter the main cylinder body 11, the position situation of bubble emergence in the water tank is observed, and the air tightness of the main seal ring 16 and the main cylinder body 11 is judged; when the push rod 13 is located at the bottom dead center of the master cylinder body 11, namely the main seal ring 16 is located at the front end of the cavity I111, the auxiliary seal ring 17 is located at the front end of the cavity II 112, the inner side of the oil inlet 14 is communicated with the cavity I111, the inner side of the oil inlet 14 is not blocked at the moment, if any position of the oil inlet 14 and the opening end of the master cylinder body 11 is provided with bubbles, the main seal ring 16 is damaged, and if bubbles appear around the master cylinder body 11, the master cylinder body 11 is damaged; when the push rod 13 is located at any position of the top dead center and the bottom dead center of the main cylinder body 11, 3 positions or more than 3 positions can be selected, and according to the same principle, if any position of the oil inlet 14 and the opening end of the main cylinder body 11 is provided with bubbles, the main seal ring 16 is damaged, and if bubbles appear around the main cylinder body 11, the main cylinder body 11 is damaged.
The air tightness detection is respectively carried out at the positions between the upper stop point, the lower stop point and the upper pointing point of the main cylinder body 11 through the push rod, so that the air tightness detection of the main sealing ring 16 is more comprehensive and accurate, and the problem of air tightness misjudgment is prevented.
To sum up, this gas tightness detection device overall structure and processing technology are simple, the cost of manufacture is low, convenient to carry, and the gas tightness detects conveniently, comprehensively, has shortened the cycle that the gas tightness detected, has reduced the erroneous judgement rate of product, has improved work efficiency, has reduced user's cost of maintenance.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. The air tightness detection device of the clutch master cylinder assembly is characterized in that the detection device comprises a fixed support (2), an adjusting and positioning component (3), an air pump (4) and an air pipe (5), one end of the fixed support (2) is connected with the adjusting and positioning component (3) capable of adjusting the length extending into the fixed support (2), the other end of the fixed support (2) is fixedly connected with the middle of the main cylinder body (11), the push rod (13) extends into the fixed support (2) and then is detachably connected with the adjusting and positioning assembly (3), and the oil outlet (15) is connected with the inflator pump (4) through an air pipe (5).
2. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 1, wherein: the fixing support (2) comprises a U-shaped support frame (21) and connecting screw rods (22), a plurality of groups of connecting holes are oppositely arranged at two ends of the U-shaped support frame (21) respectively, the connecting screw rods (22) penetrate through the two opposite connecting holes, and positioning nuts I (23) are connected to the connecting screw rods (22) at two ends of the connecting holes in a threaded mode.
3. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 2, wherein: one end of the U-shaped supporting frame (21) is connected with the main cylinder body (11) in a positioning mode, and the other end of the U-shaped supporting frame (21) is connected with the adjusting and positioning assembly (3).
4. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 3, wherein: the middle part of U-shaped support frame (21) one end is provided with locating hole I (211) and locating hole II (212), the middle part of master cylinder body (11) is provided with flange board (18), master cylinder body (11) cup joint in locating hole I (211) and make flange board (18) with the one end of U-shaped support frame (21) is laminated mutually, flange board (18) through a plurality of bolt locating component with locating hole II (212) link to each other.
5. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 3, wherein: the middle part of the other end of the U-shaped support frame (21) is provided with a positioning hole III (213), and the positioning hole III (213) is connected with the adjusting and positioning component (3).
6. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 5, wherein: adjust locating component (3) including adjusting screw (31), push-rod fork (32) and round pin axle (33), the one end of adjusting screw (31) is passed behind locating hole III (213) with push-rod fork (32) threaded connection, just threaded connection has set nut II (34) on adjusting screw (31) at locating hole III (213) both ends, the tip of push-rod fork (32) passes through round pin axle (33) with push rod (13) link to each other.
7. The airtightness detection apparatus for a clutch master cylinder assembly according to claim 6, wherein: push rod fork (32) set up to the U-shaped mounting bracket, the middle part of push rod fork (32) with adjusting screw (31) threaded connection, the both sides of the open end of push rod fork (32) are provided with mounting hole (321) relatively, push rod (13) insert the open end of push rod fork (32) and make the through-hole on push rod (13) with mounting hole (321) are relative, round pin axle (33) pass link to each other with split washer (35) location behind through-hole and mounting hole (321).
8. An air tightness detection method of a clutch master cylinder assembly, which applies the air tightness detection device of any one of claims 1 to 7, is characterized by comprising the following steps:
1) installing and positioning a clutch master cylinder assembly (1) on a fixed bracket (2);
2) an adjusting screw rod (31) is adjusted to pull a push rod (13) to enable the push rod to be located on the right side of the upper dead center of the main cylinder body (11), and the oil outlet (15) is connected with an inflation pump (4) through an air pipe (5);
3) blocking an outer side end opening of the oil inlet (14), placing the clutch main cylinder assembly (1) and the fixed support (2) with the positions adjusted into a water tank, starting the inflator pump (4) to enable gas to enter the main cylinder body (11), and observing the position condition of bubbles in the water tank to judge the air tightness of the auxiliary sealing ring (17) and the main cylinder body (11);
4) taking out a fixed support (2) provided with a clutch master cylinder assembly (1) from water, opening an outer end opening of an oil inlet (14), pulling out an air pipe (5), adjusting an adjusting screw rod (31) to push a push rod (13) to enable the push rod to be positioned at an upper dead point, a lower dead point and any position between the upper dead point and the lower dead point of a master cylinder body (11), and connecting an oil outlet (15) with an air pump (4) through the air pipe (5);
5) and (3) putting the clutch main cylinder assembly (1) and the fixed support (2) with the well adjusted positions into a water tank, starting the inflator pump (4) to enable gas to enter the main cylinder body (11), and observing the position condition of the bubbles in the water tank to judge the air tightness of the main seal ring (16) and the main cylinder body (11).
9. The method for detecting airtightness of a clutch master cylinder assembly according to claim 8, wherein: be provided with cavity I (111) and cavity II (112) that are linked together in master cylinder body (11), oil-out (15) are passed through cavity I (111) with cavity II (112) are linked together, the internal diameter of cavity I (111) is less than the internal diameter of cavity II (112), sliding connection has in cavity I (111) and cavity II (112) piston (12), main sealing washer (16) and vice sealing washer (17) are established respectively to the peripheral direction at the both ends of piston (12), main sealing washer (16) are in slide in cavity I (111), vice sealing washer (17) are in slide in cavity II (112), the rear end of cavity I (111) with the medial extremity mouth of oil inlet (14) communicates with each other.
10. The method for detecting airtightness of a clutch master cylinder assembly according to claim 9, wherein: the upper dead center of the main cylinder body (11) is that a main sealing ring (16) is positioned at the rear end of the cavity I (111), the inner side of the oil inlet (14) is blocked by the main sealing ring (16), and an auxiliary sealing ring (17) is positioned at the rear end of the cavity II (112); the position of the lower dead center of the master cylinder body (11) is that a main sealing ring (16) is positioned at the front end of the cavity I (111), an auxiliary sealing ring (17) is positioned at the front end of the cavity II (112), and the inner side of the oil inlet (14) is communicated with the cavity I (111); the position between the top dead center and the bottom dead center of the main cylinder body (11) is that the main sealing ring (16) is located at any position of the front end and the rear end of the cavity I (111).
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