CN210068791U - Clutch master cylinder capable of preventing pedal from returning too fast - Google Patents
Clutch master cylinder capable of preventing pedal from returning too fast Download PDFInfo
- Publication number
- CN210068791U CN210068791U CN201920359699.9U CN201920359699U CN210068791U CN 210068791 U CN210068791 U CN 210068791U CN 201920359699 U CN201920359699 U CN 201920359699U CN 210068791 U CN210068791 U CN 210068791U
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- cavity
- sleeve
- spring
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Abstract
A clutch master cylinder capable of preventing a pedal from returning too fast comprises a pump body, a piston, a push rod, an upper sleeve, a core rod, an oil inlet and outlet pipe, a guide frame, a lower sleeve, a spring A and a spring B. When the piston moves from the upper end of the stroke to the lower end of the stroke, the communication hole of the upper sleeve is opened in the upper cavity of the pump body; when the piston moves from the lower end of the stroke to the upper end of the stroke, the communication hole of the upper sleeve is isolated from the upper cavity of the pump body. The utility model has the advantages of, after the driver accomplished the car operation of shifting, need not to concentrate on the speed of loosening of clutch pedal with energy, can loosen the clutch pedal at will, the clutch pedal can experience the process of "first fast later than slow" when automatic re-setting, and speed is very fast when just beginning to reset promptly, and the speed slows down when being close to the stroke end that resets, effectively avoids because of the car "shake" that clutch pedal return overspeed leads to, flame-out even.
Description
Technical Field
The utility model relates to an auto-parts field, especially a can prevent too fast clutch master cylinder of footboard return.
Background
The automobile clutch master cylinder device is connected between the pedal plate and the clutch slave cylinder and is used for acquiring pedal stroke information and separating the clutch under the action of the clutch slave cylinder.
The existing automobile clutch master cylinder structure is shown in fig. 1, and comprises a pump shell 61, a push rod 62, a guide plug 63 and a return spring 64; an inner cavity for containing hydraulic oil is arranged in the pump shell 61, a first oil port 611 and a second oil port 612 which are communicated with the inner cavity are arranged on the outer wall of the pump shell, the first oil port 611 is communicated to an oil tank (not shown in the figure) through a pipeline, and the second oil port 612 is communicated to a clutch slave cylinder (not shown in the figure) through a pipeline; the guide plug 63 is movably arranged in the inner cavity of the pump shell 61 and divides the inner cavity of the pump shell 61 into a cavity A613 and a cavity B614; the return spring 64 is arranged in a cavity B614 of the pump shell 61 in a compressed mode and is abutted against the lower end face of the guide plug 63; the push rod 62 has one end fixed to the upper end surface of the guide plug 63 and the other end extending out of the cavity a613 and connected to a clutch pedal (not shown).
When a driver steps on the clutch pedal, the push rod pushes the guide plug to overcome the elastic force of the return spring to move, so that the oil pressure in the cavity B is increased, the hydraulic oil in the cavity B enters the clutch slave cylinder through the hose to force the pull rod of the clutch slave cylinder to push the release fork, and the release bearing is pushed forward, so that the clutch is converted into a release state; when the driver releases the clutch pedal, the guide plug returns to the initial position under the action of the elastic force of the return spring, the oil pressure in the cavity B is reduced, the hydraulic pressure in the clutch slave cylinder is released, the release fork returns to the original position, and the clutch returns to the engaged state.
The existing clutch master cylinder has the following defects: after the driver finishes the gear shifting operation, the clutch pedal is required to be slowly released to avoid the phenomenon of violent shaking of the automobile, which requires the driver to keep higher spirit concentration and attention, and is easy to be mentally fatigued after driving for a long time or performing multiple gear shifting operations. If after the driver finishes the gear shifting operation, the clutch pedal is released suddenly, the clutch pedal can return quickly under the elastic force action of the return spring, and the hydraulic pressure in the inner cavity of the pump body suddenly changes, so that the automobile shakes and even stalls.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, and provide a can prevent the too fast clutch master cylinder of footboard return, it has solved driver and has accomplished the operation back of shifting, if it is too fast to loosen the clutch pedal, can arouse car "shake", flameout problem even.
The technical scheme of the utility model is that: the clutch master cylinder capable of preventing the pedal from returning too fast comprises a pump body, a piston, a push rod, an upper sleeve, a core rod, an oil inlet and outlet pipe, a guide frame, a lower sleeve, a spring A and a spring B;
an inner cavity for containing hydraulic oil is arranged in the pump body, and an upper oil inlet and an upper oil outlet and a lower oil inlet and an oil outlet are arranged outside the pump body;
the piston is movably arranged in the inner cavity of the pump body and divides the inner cavity of the pump body into an upper cavity communicated with the upper oil inlet and outlet and a lower cavity communicated with the lower oil inlet and outlet;
one end of the push rod is fixedly connected to the lower end face of the piston, and the other end of the push rod extends out of the upper cavity of the pump body;
the upper sleeve is in a sleeve shape with one closed end and an open end, the upper sleeve is fixedly arranged in the upper cavity of the pump body, the open end of the upper sleeve is positioned in the upper cavity of the pump body, the closed end extends out of the upper cavity of the pump body and is positioned outside the pump body, the closed end positioned outside the pump body is provided with an oil discharge hole, the open end of the upper sleeve is provided with a plurality of communicating holes, and the oil discharge hole and the communicating holes are both communicated with;
the core rod is arranged in the upper cavity of the pump body, is movably inserted in the inner cavity of the upper sleeve through the opening end of the upper sleeve, and one end of the core rod, which is positioned outside the upper sleeve, is fixedly connected to the upper end face of the piston;
the oil inlet and outlet pipe is a pipe body with one closed end and the other open end, the pipe body is arranged in the lower cavity of the pump body, the closed end of the pipe body is positioned in the lower cavity of the pump body, the open end of the pipe body extends out of the lower cavity of the pump body and is positioned outside the pump body, the closed end of the pipe body positioned in the lower cavity of the pump body is provided with two oil through holes, the two oil through holes are opposite to each other and are communicated to the inner cavity of the oil;
the guide frame is fixedly arranged in the lower cavity of the pump body;
the lower sleeve is in a sleeve shape with an opening at one end, the wall surface of an inner cavity of the lower sleeve is provided with a positioning table which is movably arranged in the guide frame, the opening end of the lower sleeve is opposite to the oil passage of the oil inlet and outlet pipe and can move along the guide frame so as to plug or open the oil passage of the oil inlet and outlet pipe;
the spring A is arranged in the lower cavity of the pump body, the upper end of the spring A is abutted against the lower end surface of the piston, and the lower end of the spring A is abutted against the lower sleeve;
the spring B is arranged in the lower cavity of the pump body, the upper end of the spring B extends into the inner cavity of the lower sleeve and abuts against a positioning table in the inner cavity of the lower sleeve, and the lower end of the spring B abuts against the bottom surface of the lower cavity of the pump body;
when the piston moves from the upper end of the stroke to the lower end of the stroke, the volume of the upper cavity of the pump body is enlarged, the volume of the lower cavity of the pump body is reduced, the piston moves downwards to drive the core rod to move downwards in the inner cavity of the upper sleeve, the communicating hole of the upper sleeve is opened in the upper cavity of the pump body, the piston compresses the spring A when moving downwards, the elasticity of the spring A is larger than that of the spring B, the lower sleeve moves downwards under the action of the elasticity of the spring A and enters the oil passage of the oil inlet and outlet pipe, and therefore the oil passage of the oil inlet and outlet;
when the piston moves from the lower end of the stroke to the upper end of the stroke, the volume of the lower cavity of the pump body is expanded, the volume of the upper cavity of the pump body is reduced, the piston drives the core rod to move upwards in the inner cavity of the upper sleeve when moving upwards, the communicating hole of the upper sleeve is isolated from the upper cavity of the pump body, the spring A is released when the piston moves upwards, the elastic force of the spring B is larger than that of the spring A, the lower sleeve moves upwards under the elastic force of the spring B and withdraws from the oil passage of the oil inlet and outlet pipe, and therefore the oil passage of the oil inlet.
The utility model discloses further technical scheme is: the ratio of the caliber of the oil inlet and outlet on the pump body to the caliber of the oil outlet of the upper sleeve is 3-10: 1.
the utility model discloses still further technical scheme is: the upper sleeve has a plurality of communication holes arranged at intervals in the moving direction of the mandrel.
The utility model discloses a further technical scheme is: the outer wall of the pump body is fixedly provided with an installation plate.
Compared with the prior art, the utility model have following advantage:
after the driver finishes the automobile gear shifting operation, the driver does not need to concentrate on the loosening speed of the clutch pedal, can loosen the clutch pedal at will, and the clutch pedal can experience the process of 'first quick and then slow' when automatically resetting, namely, the speed is higher when the clutch pedal is just reset, and the speed is slowed when the clutch pedal is close to the reset stroke end, so that the phenomenon that the automobile shakes or even stalls due to the fact that the clutch pedal is reset and overruns is effectively avoided.
The invention is further described below with reference to the figures and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention at state 1;
fig. 2 is a schematic structural diagram of the present invention in state 2;
fig. 3 is a schematic structural diagram of a conventional automobile clutch master cylinder.
Detailed Description
Example 1:
as shown in fig. 1-2, the clutch master cylinder capable of preventing the pedal from returning too fast comprises a pump body 1, a piston 21, a push rod 22, an upper sleeve 31, a core rod 32, an oil inlet and outlet pipe 41, a guide frame 42, a lower sleeve 43, a spring a51 and a spring B52.
An inner cavity for containing hydraulic oil is arranged in the pump body 1, and an upper oil inlet and outlet port 11 and a lower oil inlet and outlet port 12 are arranged outside the inner cavity.
The piston 21 is movably installed in the inner cavity of the pump body 1 and divides the inner cavity of the pump body 1 into an upper cavity 13 communicated with the upper oil inlet and outlet port 11 and a lower cavity 14 communicated with the lower oil inlet and outlet port 12.
One end of the push rod 22 is fixedly connected to the lower end surface of the piston 21, and the other end thereof extends out of the upper cavity 13 of the pump body 1.
The upper sleeve 31 is a sleeve with one closed end and the other open end, is fixedly arranged in the upper cavity 13 of the pump body 1, the open end of the upper sleeve is positioned in the upper cavity 13 of the pump body 1, the closed end of the upper sleeve extends out of the upper cavity 13 of the pump body 1 and is positioned outside the pump body 1, the closed end of the upper sleeve positioned outside the pump body 1 is provided with an oil unloading hole 311, the open end of the upper sleeve is provided with a plurality of communicating holes 312, and the oil unloading hole 311 and the communicating holes 312 are both.
The core rod 32 is disposed in the upper cavity 13 of the pump body 1, is movably inserted into the inner cavity of the upper sleeve 31 through the opening end of the upper sleeve 31, and has one end located outside the upper sleeve 31 fixed to the upper end surface of the piston 21.
The oil inlet and outlet pipe 41 is a pipe body with one closed end and the other open end, and is arranged in the lower cavity 14 of the pump body 1, the closed end is positioned in the lower cavity 14 of the pump body 1, the open end of the closed end extends out of the lower cavity 14 of the pump body 1 and is positioned outside the pump body 1, two oil through holes are arranged on the closed end of the lower cavity 14 of the pump body 1, the two oil through holes are opposite to each other and are communicated to an inner cavity of the oil inlet and outlet pipe 41, and an oil through channel 411 is formed between the.
The guide 42 is fixed in the lower chamber 14 of the pump body 1.
The lower sleeve 43 is in the shape of a sleeve with an open end, and a positioning platform 431 is disposed on the inner wall surface of the lower sleeve and movably mounted in the guide frame 42, and the open end of the lower sleeve faces the oil passage 411 of the oil inlet/outlet pipe 41 and can move along the guide frame 42 to close or open the oil passage 411 of the oil inlet/outlet pipe 41.
The spring a51 is disposed in the lower cavity 14 of the pump body 1, and has an upper end abutting against the lower end surface of the piston 21 and a lower end abutting against the lower sleeve 43.
The spring B52 is arranged in the lower cavity 14 of the pump body 1, the upper end of the spring B52 extends into the inner cavity of the lower sleeve 43 and is abutted against the positioning platform 431 in the inner cavity of the lower sleeve 43, and the lower end of the spring B52 is abutted against the bottom surface of the lower cavity 14 of the pump body 1.
Preferably, the plurality of communication holes 312 of the upper sleeve 31 are provided at intervals in the moving direction of the mandrel bar 32.
Preferably, the ratio of the caliber of the oil inlet/outlet port 11 on the pump body 1 to the caliber of the oil discharge hole 311 of the upper sleeve 31 is 5: 1.
preferably, the outer wall of the pump body 1 is fixedly provided with a mounting plate 15, and the pump body 1 can be mounted on a vehicle frame not shown in the figure through the mounting plate 15.
Brief description the utility model discloses with the relation of connection of car:
the upper oil inlet and outlet port 11 of the pump body 1, the oil discharge hole 311 of the upper sleeve 31, and the open end of the oil inlet/outlet pipe 41 are respectively communicated with a main oil tank (not shown) of an automobile through pipes. The lower inlet and outlet 12 is connected to a clutch cylinder (not shown) of the vehicle through a pipe.
Brief description the utility model discloses a theory of operation:
when a driver performs a gear shifting operation to depress a clutch pedal (not shown in the figures), the clutch pedal drives the piston 21 to move from the upper end of the stroke to the lower end of the stroke through the push rod 22 (i.e. from the state 1 shown in fig. 1 to the state 2 shown in fig. 2), so that the volume of the upper cavity 13 of the pump body 1 is expanded, the volume of the lower cavity 14 of the pump body 1 is reduced, and the volume of the cavity between the upper sleeve 31 and the core rod 32 is expanded. When the piston 21 moves downwards, the core rod 32 is driven to move downwards in the inner cavity of the upper sleeve 31, so that the communication hole 312 of the upper sleeve 31 is opened in the upper cavity 13 of the pump body 1, when the piston 21 moves downwards, the spring A51 is compressed, the elastic force of the spring A51 is larger than that of the spring B52, the lower sleeve 43 moves downwards under the elastic force of the spring A51 and enters the oil passage 411 of the oil inlet and outlet pipe 41, and the oil passage 411 of the oil inlet and outlet pipe 41 is closed.
In the process, the hydraulic oil in the main oil tank enters the upper cavity 13 of the pump body 1 through the upper oil inlet and outlet port 11, the hydraulic oil in the upper cavity 13 enters the cavity between the upper sleeve 31 and the core rod 32 through the communication hole 312 on the upper sleeve 31, and the hydraulic oil in the lower cavity 14 enters the clutch slave cylinder through the lower oil inlet and outlet port 12, so that the clutch is converted into a separated state.
When the driver releases the clutch pedal, the piston 21 moves from the lower end of the stroke to the upper end of the stroke (i.e., from the state 2 shown in fig. 2 to the state 1 shown in fig. 1) by the elastic force of the spring a51, so that the volume of the lower chamber 14 of the pump body 1 is expanded, the volume of the upper chamber 13 of the pump body 1 is reduced, and the volume of the cavity between the upper sleeve 31 and the mandrel 32 is reduced. When the piston 21 moves upwards, the core rod 32 is driven to move upwards in the inner cavity of the upper sleeve 31, so that the communication hole 312 of the upper sleeve 31 is separated from the upper cavity 13 of the pump body 1, when the piston 21 moves upwards, the spring A51 is loosened, the elastic force of the spring B52 is larger than that of the spring A51, the lower sleeve 43 moves upwards under the elastic force of the spring B52 and withdraws from the oil passage 411 of the oil inlet and outlet pipe 41, and the oil passage 411 of the oil inlet and outlet pipe 41 is opened.
In this process, the hydraulic oil in the upper chamber 13 flows back to the main oil tank through the upper oil inlet and outlet port 11, the hydraulic oil in the cavity between the upper sleeve 31 and the mandrel 32 flows back to the main oil tank through the oil discharge hole 311, the hydraulic oil in the main oil tank flows back to the lower chamber 14 through the oil passage 411 of the inlet and outlet pipe 41, and the hydraulic oil in the clutch slave cylinder flows back to the lower chamber 14 through the lower oil inlet and outlet port 12, so that the clutch is changed to the engaged state.
In this process, as the piston 21 moves upward, more and more of the communication holes 312 of the upper sleeve 31 are isolated from the upper chamber 13 of the pump body 1, the oil pressure in the cavity between the upper sleeve 31 and the mandrel 32 becomes higher, and when the oil pressure in the cavity between the upper sleeve 31 and the mandrel 32 becomes higher than the oil pressure in the upper chamber 13, the return speed of the piston 21 is slowed, and at this time, the return speed of the piston 21 is determined by the oil discharge speed of the oil discharge hole 311.
Claims (5)
1. Can prevent too fast clutch master cylinder of footboard return, characterized by: comprises a pump body (1), a piston (21), a push rod (22), an upper sleeve (31), a core rod (32), an oil inlet and outlet pipe (41), a guide frame (42), a lower sleeve (43), a spring A (51) and a spring B (52);
an inner cavity for containing hydraulic oil is arranged in the pump body (1), and an upper oil inlet and outlet (11) and a lower oil inlet and outlet (12) are arranged outside the pump body;
the piston (21) is movably arranged in the inner cavity of the pump body (1) and divides the inner cavity of the pump body (1) into an upper cavity (13) communicated with the upper oil inlet and outlet (11) and a lower cavity (14) communicated with the lower oil inlet and outlet (12);
one end of a push rod (22) is fixedly connected to the lower end face of the piston (21), and the other end of the push rod extends out of an upper cavity (13) of the pump body (1);
the upper sleeve (31) is in a sleeve shape with one closed end and the other open end, is fixedly arranged in an upper cavity (13) of the pump body (1), the open end of the upper sleeve is positioned in the upper cavity (13) of the pump body (1), the closed end extends out of the upper cavity (13) of the pump body (1) and is positioned outside the pump body (1), the closed end positioned outside the pump body (1) is provided with an oil unloading hole (311), the open end of the upper sleeve is provided with a plurality of communicating holes (312), and the oil unloading hole (311) and the communicating holes (312) are both communicated with the inner cavity of the upper sleeve (;
the core rod (32) is arranged in an upper cavity (13) of the pump body (1), is movably inserted into an inner cavity of the upper sleeve (31) through the opening end of the upper sleeve (31), and one end of the core rod, which is positioned outside the upper sleeve (31), is fixedly connected to the upper end face of the piston (21);
the oil inlet and outlet pipe (41) is a pipe body with one closed end and the other open end, and is arranged in the lower cavity (14) of the pump body (1), the closed end of the oil inlet and outlet pipe is positioned in the lower cavity (14) of the pump body (1), the open end of the oil inlet and outlet pipe extends out of the lower cavity (14) of the pump body (1) and is positioned outside the pump body (1), the closed end of the oil inlet and outlet pipe positioned in the lower cavity (14) of the pump body (1) is provided with two oil through holes, the two oil through holes are opposite to each other and are communicated with the inner cavity of the oil inlet and outlet pipe;
the guide frame (42) is fixedly arranged in the lower cavity (14) of the pump body (1);
the lower sleeve (43) is in a sleeve shape with an open end, the wall surface of an inner cavity of the lower sleeve is provided with a positioning platform (431) which is movably arranged in the guide frame (42), the open end of the lower sleeve is opposite to an oil passage (411) of the oil inlet and outlet pipe (41) and can move along the guide frame (42) so as to plug or open the oil passage (411) of the oil inlet and outlet pipe (41);
the spring A (51) is arranged in the lower cavity (14) of the pump body (1), the upper end of the spring A is abutted against the lower end face of the piston (21), and the lower end of the spring A is abutted against the lower sleeve (43);
the spring B (52) is arranged in the lower cavity (14) of the pump body (1), the upper end of the spring B extends into the inner cavity of the lower sleeve (43) and abuts against a positioning table (431) in the inner cavity of the lower sleeve (43), and the lower end of the spring B abuts against the bottom surface of the lower cavity (14) of the pump body (1);
when the piston (21) moves from the upper end of the stroke to the lower end of the stroke, the volume of an upper cavity (13) of the pump body (1) is expanded, the volume of a lower cavity (14) of the pump body (1) is reduced, the core rod (32) is driven to move downwards in the inner cavity of the upper sleeve (31) when the piston (21) moves downwards, a communication hole (312) of the upper sleeve (31) is opened in the upper cavity (13) of the pump body (1), the spring A (51) is compressed when the piston (21) moves downwards, the elastic force of the spring A (51) is larger than that of the spring B (52), the lower sleeve (43) moves downwards under the elastic force of the spring A (51) and enters an oil passage (411) of the oil inlet and outlet pipe (41), and therefore the oil passage (411) of the oil inlet and outlet pipe (41) is closed;
when the piston (21) moves from the lower end of the stroke to the upper end of the stroke, the volume of a lower cavity (14) of the pump body (1) is expanded, the volume of an upper cavity (13) of the pump body (1) is reduced, the core rod (32) is driven to move upwards in the inner cavity of the upper sleeve (31) when the piston (21) moves upwards, a communication hole (312) of the upper sleeve (31) is isolated from the upper cavity (13) of the pump body (1), the spring A (51) is loosened when the piston (21) moves upwards, the elastic force of the spring B (52) is larger than that of the spring A (51), the lower sleeve (43) moves upwards under the elastic force of the spring B (52) and withdraws from an oil through channel (411) of the oil inlet and outlet pipe (41), and the oil through channel (411) of the oil inlet and outlet pipe (41.
2. The master clutch pump as claimed in claim 1, wherein the clutch master pump is characterized in that: the ratio of the caliber of the oil inlet and outlet (11) on the pump body (1) to the caliber of the oil discharge hole (311) of the upper sleeve (31) is 3-10: 1.
3. the master clutch pump as claimed in claim 1 or 2, wherein: a plurality of communication holes (312) of the upper sleeve (31) are provided at intervals along the moving direction of the mandrel (32).
4. The master clutch pump as claimed in claim 1 or 2, wherein: the outer wall of the pump body (1) is fixedly provided with a mounting plate (15).
5. The master clutch pump as claimed in claim 4, wherein the clutch master pump comprises: the outer wall of the pump body (1) is fixedly provided with a mounting plate (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920359699.9U CN210068791U (en) | 2019-03-21 | 2019-03-21 | Clutch master cylinder capable of preventing pedal from returning too fast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920359699.9U CN210068791U (en) | 2019-03-21 | 2019-03-21 | Clutch master cylinder capable of preventing pedal from returning too fast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210068791U true CN210068791U (en) | 2020-02-14 |
Family
ID=69433870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920359699.9U Expired - Fee Related CN210068791U (en) | 2019-03-21 | 2019-03-21 | Clutch master cylinder capable of preventing pedal from returning too fast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210068791U (en) |
-
2019
- 2019-03-21 CN CN201920359699.9U patent/CN210068791U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200214 Termination date: 20210321 |