CN217440637U - Take torque protection function's freewheel clutch - Google Patents
Take torque protection function's freewheel clutch Download PDFInfo
- Publication number
- CN217440637U CN217440637U CN202220802529.5U CN202220802529U CN217440637U CN 217440637 U CN217440637 U CN 217440637U CN 202220802529 U CN202220802529 U CN 202220802529U CN 217440637 U CN217440637 U CN 217440637U
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- China
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- power transmission
- star wheel
- sleeve
- friction plate
- pressing sleeve
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
An overrunning clutch with a torque protection function comprises a clutch unit, a clamping sleeve, a pressing sleeve, a friction plate, a disc spring and a mandrel; the middle part of the mandrel is provided with a power transmission piece, two sides of the power transmission piece are respectively sleeved with an inner friction piece and an outer friction piece, the power transmission piece and the inner friction piece are sequentially stacked in an inner cavity at the tail end of the outer star wheel of the clutch unit, the power transmission piece is not contacted with the outer star wheel, the inner friction piece and the outer friction piece are connected with the tail end of the outer star wheel through splines, and a disc spring is pressed on the outer side of the outer friction piece; the clamping sleeve and the pressing sleeve are sleeved on the outer side of the outer star wheel of the clutch unit, and the disc spring is tightly pressed on the outer friction plate by adjusting the distance between the clamping sleeve and the pressing sleeve, so that the outer friction plate and the inner friction plate are tightly clamped on the power transmission plate. The overrunning clutch can realize automatic protection to the load exceeding the rated torque and prevent the starting motor from being damaged.
Description
Technical Field
The utility model relates to an overrunning clutch, what specifically said is a take moment of torsion protect function's overrunning clutch.
Background
The overrunning clutch, also called one-way clutch, is a device which can only transmit power from one steering direction by utilizing the relative rotation speed change of a main driving part and a driven part or the change of the rotation direction to automatically combine and separate.
In a starting system of an automobile and an airplane, an overrunning clutch is commonly used between a starting motor and an engine and has the function that when the starting motor drives the engine to start, the overrunning clutch is in a wedged state and transmits torque; when the engine reaches the specified rotating speed and starts, the starting motor stops working, the overrunning clutch is switched to be in the overrunning state, and the starting motor is disconnected from the engine.
During the process that the starting motor drives the engine to start through the overrunning clutch, the power of the engine serving as a load is continuously changed, and particularly at the beginning of starting, under the action of factors such as impact, vibration, poor lubrication and the like, the load with far excess rated torque is generated sometimes and exceeds the bearing capacity of the starting motor, so that the starting motor is damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a take moment of torsion protect function's freewheel clutch can realize automatic protection to the load that surpasss rated torque, prevents starter motor's damage.
In order to realize the technical purpose, the adopted technical scheme is as follows: an overrunning clutch with a torque protection function comprises a clutch unit, a clamping sleeve, a pressing sleeve, a friction plate, a disc spring and a mandrel;
one end of the mandrel is used for being connected with an external input, a power transmission piece is arranged in the middle of the mandrel, an inner friction plate and an outer friction plate are respectively sleeved on two sides of the power transmission piece in the axial direction, two axial side faces of the power transmission piece, the outer side face of the inner friction plate and the inner side face of the outer friction plate are mutually contacted and are all planes, the outer friction plate, the power transmission piece and the inner friction plate are sequentially stacked in an inner cavity at the tail end of an outer star wheel of a clutch unit, the power transmission piece is not contacted with the outer star wheel, the inner friction plate and the outer friction plate are connected with the tail end of the outer star wheel through splines, and a disc spring is pressed on the outer side of the outer friction plate;
the clamping sleeve and the pressing sleeve are sleeved on the outer side of the outer star wheel of the clutch unit, one end of the pressing sleeve is pressed on the outer side of the disc spring, the other end of the pressing sleeve is connected with one end of the clamping sleeve through the height adjusting mechanism, the other end of the clamping sleeve is clamped on the outer star wheel of the clutch unit, and the disc spring is tightly pressed on the outer friction plate through adjusting the distance between the clamping sleeve and the pressing sleeve, so that the outer friction plate and the inner friction plate are tightly clamped on the power transmission plate.
The height adjusting mechanism is a thread adjusting mechanism, a thread pair is formed by matching a thread part of the clamping sleeve and a thread part of the pressing sleeve in a split-phase mode, and height adjustment is achieved by rotating the clamping sleeve and/or the pressing sleeve.
The utility model has the advantages that:
(1) the overrunning clutch with the torque protection function can effectively protect the starting motor from being influenced by excessive torque. When the overlarge torque disappears, the clutch can automatically recover to normal work, the disassembly inspection is not needed, and the reliability of the starting motor is improved.
(2) Through the number of turns of screwing up of adjustment screw ring and cutting ferrule, the settlement overload torque value that can be free is applicable in the starter motor of multiple model.
(3) The overrunning clutch with the torque protection function integrates the torque protection function into the overrunning clutch, and has the advantages of compact structure, small volume and light weight.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
fig. 2 is a three-dimensional cross-sectional view of the present invention;
in the figure: 1. the clutch comprises a pressing sleeve, 2, a disc spring, 3, a mandrel, 4, a bearing, 5, an outer friction plate, 6, an inner friction plate, 7, a clamping sleeve, 8, a clutch unit, 301, a power transmission plate, 801, an outer star wheel, 802, a roller, 803, a retainer, 804 and an inner ring.
Detailed Description
As shown in fig. 1 and 2, an overrunning clutch with torque protection function includes a pressing sleeve 1, a disc spring 2, a mandrel 3, an outer friction plate 5, an inner friction plate 6, a sleeve 7, and a clutch unit 12, where the clutch unit 12 is a conventional overrunning clutch with an outer star wheel, for example, a roller clutch unit includes an outer star wheel 801, a roller 802, a retainer 803, an inner ring 804, a magnet or a spring.
One end of the mandrel 3 is used for being connected with an external input, the external input is a starting motor, an internal spline is arranged in the end and is matched with an external spline at the end of the starting motor, a power transmission sheet 301 is arranged in the middle of the mandrel 3, according to the axial direction, two sides of the power transmission sheet 301 are respectively sleeved with an inner friction sheet 6 and an outer friction sheet 5, two axial side surfaces of the power transmission sheet 301, the outer side surface of the inner friction sheet 6 and the inner side surface of the outer friction sheet 5 are mutually contacted and are respectively a plane, the plane can be vertical to the axial direction or inclined to the axial direction, the force transmission is realized by utilizing the friction force between the power transmission sheet 301 and the outer and inner friction sheets, the outer friction sheet 5, the power transmission sheet 301 and the inner friction sheet 6 are sequentially stacked in an inner cavity at the tail end of an outer star wheel 801 of a clutch unit 8, the power transmission sheet 301 is not contacted with the outer star wheel 801, the inner friction sheet 6 and the outer friction sheet 5 are connected with the tail end of the outer star wheel 801 through splines, and a disc spring 2 is pressed on the outer side of the outer friction plate 5.
The cutting ferrule 7 and the pressing sleeve 1 are both sleeved outside the outer star wheel 801 of the clutch unit 8, one end of the pressing sleeve 1 is pressed outside the disc spring 2, the other end of the pressing sleeve is connected with one end of the cutting ferrule 7 through a height adjusting mechanism, the other end of the cutting ferrule 7 is clamped on the outer star wheel 801 of the clutch unit 8, the disc spring 2 is tightly pressed on the outer friction plate 5 through adjusting the distance between the cutting ferrule 7 and the pressing sleeve 1, and the outer friction plate 5 and the inner friction plate 6 are tightly clamped on the power transmission plate 301. The height adjustment mechanism may be threaded or bolted.
The height adjusting mechanism is a thread adjusting mechanism, a thread pair is formed by matching a thread part of the clamping sleeve 7 and a thread part of the pressing sleeve 1, and height adjustment is realized by rotating the clamping sleeve 7 and/or the pressing sleeve 1. The pressing sleeve 1 is connected with the clamping sleeve 7 through a thread pair, the inner diameter of the pressing sleeve 1 is in clearance fit with the outer diameter of the outer star wheel 801, the tail end blocking portion of the clamping sleeve 7 abuts against a boss on the periphery of the outer star wheel 801, the disc spring 2 is installed inside the pressing sleeve 1, does not contact the outer star wheel 801 and is located outside the outer star wheel 801, the outer friction plate 5 and the inner friction plate 6 are connected with the outer star wheel 801 through splines, the mandrel 3 is clamped between the outer friction plate 5 and the inner friction plate 6, the mandrel 3 does not contact the outer star wheel 801, and the mandrel 3 is connected with the starting motor through the inner splines.
As shown in fig. 2, during assembly, the pressing sleeve 1 and the ferrule 7 are screwed tightly to compress the disc spring 2, so as to generate extrusion force, and friction force is generated between the mandrel 3 and the outer friction plate 5 and the inner friction plate 6. After the starting motor is started, torque is transmitted to the mandrel 3 through the spline, the mandrel 3 drives the outer friction plate 5 and the inner friction plate 6 to rotate under the action of friction force, the outer friction plate 5 and the inner friction plate 6 are in spline connection with the outer star wheel 801, the torque is transmitted to the outer star wheel 801, namely, the torque is transmitted to the clutch unit, the clutch is wedged, the torque is transmitted to the engine through the outer spline of the inner ring 804 to drive the engine to rotate, after the engine reaches a specified rotating speed, the starting motor stops working, the clutch is automatically switched to an overrunning state, the starting motor and the engine are disconnected, and one-time starting process is completed.
When the load exceeds the bearing capacity of the starter under the action of factors such as impact, vibration, poor lubrication and the like, the mandrel 3, the outer friction plate 5 and the inner friction plate 6 slide relatively, the starting motor cannot bear the torque exceeding the rated load, and the motor is effectively protected from being damaged. When the overload torque disappears, the friction force between the mandrel 3 and the outer friction plate 5 and the inner friction plate 6 can continue to transmit the torque normally, and the normal work is automatically recovered without disassembly and inspection.
The maximum torque of the clutch can be adjusted by adjusting the number of screwing circles of the pressing sleeve 1 and the clamping sleeve 7, and the maximum torque can be matched with the rated torque of the starting motor. Or the maximum torque of the clutch can be adjusted by adjusting the distance between the bolt speed-adjusting pressing sleeve 1 and the clamping sleeve 7 to match the rated torque of the starting motor.
Claims (2)
1. The utility model provides a take torque protect function's freewheel clutch which characterized in that: comprises a clutch unit (8), a cutting sleeve (7), a pressing sleeve (1), an outer friction plate (5), an inner friction plate (6), a disc spring (2) and a mandrel (3);
one end of a mandrel (3) is used for being connected with an external input, a power transmission plate (301) is arranged in the middle of the mandrel (3), inner friction plates (6) and outer friction plates (5) are respectively sleeved on two sides of the power transmission plate (301) in the axial direction, the outer side surfaces of the inner friction plates (6) and the inner side surfaces of the outer friction plates (5) are in contact with each other and are flat, the outer friction plates (5), the power transmission plate (301) and the inner friction plates (6) are sequentially stacked in an inner cavity at the tail end of an outer star wheel (801) of a clutch unit (8), the power transmission plate (301) is not in contact with the outer star wheel (801), the inner friction plates (6) and the outer friction plates (5) are connected with the tail end of the outer star wheel (801) through splines, and disc springs (2) are arranged on the outer side of the outer friction plates (5) in a pressing mode;
the outer side of an outer star wheel (801) of a clutch unit (8) is sleeved with a clamping sleeve (7) and a pressing sleeve (1), one end of the pressing sleeve (1) is pressed on the outer side of a disc spring (2), the other end of the pressing sleeve is connected with one end of the clamping sleeve (7) through a height adjusting mechanism, the other end of the clamping sleeve (7) is clamped on the outer star wheel (801) of the clutch unit (8), and the disc spring (2) is pressed on an outer friction plate (5) by adjusting the distance between the clamping sleeve (7) and the pressing sleeve (1), so that the outer friction plate (5) and an inner friction plate (6) clamp a power transmission plate (301).
2. The overrunning clutch with torque protection as claimed in claim 1, wherein: the height adjusting mechanism is a thread adjusting mechanism, a thread pair is formed by matching a thread part of the clamping sleeve (7) and a thread part of the pressing sleeve (1), and the height adjustment is realized by rotating the clamping sleeve (7) and/or the pressing sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220802529.5U CN217440637U (en) | 2022-04-08 | 2022-04-08 | Take torque protection function's freewheel clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220802529.5U CN217440637U (en) | 2022-04-08 | 2022-04-08 | Take torque protection function's freewheel clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217440637U true CN217440637U (en) | 2022-09-16 |
Family
ID=83217447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220802529.5U Active CN217440637U (en) | 2022-04-08 | 2022-04-08 | Take torque protection function's freewheel clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217440637U (en) |
-
2022
- 2022-04-08 CN CN202220802529.5U patent/CN217440637U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |