阅读说明：本技术 一种具有过速自主保护功能的离合器 (Clutch with overspeed autonomous protection function ) 是由 盛冬平 周舒 胡少刚 徐红丽 何亚峰 门艳忠 于 2021-05-08 设计创作，主要内容包括：本发明为一种具有过速自主保护功能的离合器,包括输入轴和活动设置在所述输入轴上的离合器,所述离合器远离所述输入轴的一端固定有输出轴,所述输入轴上固定有固定块,所述输入轴的一端设有外花键,所述离合器靠近所述输入轴的一端设有内花键,所述离合器通过内花键滑动设置在所述外花键上,所述输入轴上套有弹性机构,所述弹性机构一端抵住所述固定块,另一端抵住所述离合器；所述输入轴上还设有若干离心控制机构,所述离心控制机构用于驱动所述离合器在所述外花键上的滑动。本发明利用质量块在旋转时产生的离心力,通过连杆结构,使得主动离合器在轴向产生轴向分力,进行将主动离合器和从动离合器分离。(The invention relates to a clutch with an overspeed autonomous protection function, which comprises an input shaft and a clutch movably arranged on the input shaft, wherein an output shaft is fixed at one end of the clutch, which is far away from the input shaft, the input shaft is fixedly provided with a fixed block, an external spline is arranged at one end of the input shaft, an internal spline is arranged at one end of the clutch, which is close to the input shaft, the clutch is arranged on the external spline in a sliding manner through the internal spline, an elastic mechanism is sleeved on the input shaft, one end of the elastic mechanism props against the fixed block, and the other end of the elastic mechanism props against the clutch; the input shaft is also provided with a plurality of centrifugal control mechanisms, and the centrifugal control mechanisms are used for driving the clutch to slide on the external splines. The invention utilizes the centrifugal force generated by the mass block during rotation to enable the driving clutch to generate axial component force in the axial direction through the connecting rod structure so as to separate the driving clutch from the driven clutch.)

1. A clutch with an overspeed autonomous protection function is characterized in that: the clutch comprises an input shaft (1) and a clutch movably arranged on the input shaft (1), wherein an output shaft (3) is fixed at one end, far away from the input shaft (1), of the clutch, a fixed block (7) is fixed on the input shaft (1), an external spline (8) is arranged at one end of the input shaft (1), an internal spline (9) is arranged at one end, close to the input shaft (1), of the clutch, the clutch is arranged on the external spline (8) in a sliding mode through the internal spline (9), an elastic mechanism is sleeved on the input shaft (1), one end of the elastic mechanism abuts against the fixed block (7), and the other end of the elastic mechanism abuts against the clutch; the clutch is characterized in that the input shaft (1) is also provided with a plurality of centrifugal control mechanisms (5), and the centrifugal control mechanisms (5) are used for driving the clutch to slide on the external spline (8).

2. The clutch with the overspeed autonomous protection function of claim 1, wherein: the centrifugal control mechanism (5) comprises a first connecting rod (5-4) and a second connecting rod (5-2), one end of the first connecting rod (5-4) is fixed on the fixed block (7), the other end of the first connecting rod is rotatably arranged on the second connecting rod (5-2) through a pin shaft, the other end of the second connecting rod (5-2) is fixed on the clutch, and mass blocks (5-1) are fixed on two sides of the pin shaft.

3. A clutch having an overspeed autonomous protection function according to claim 2, wherein: the centrifugal control mechanism (5) further comprises a first support (5-5) and a second support (5-3), one end, far away from the pin shaft, of the first connecting rod (5-4) is hinged to the first support (5-5), one end, far away from the pin shaft, of the second connecting rod (5-2) is hinged to the second support (5-3), the first support (5-5) is fixed on the fixed block (7), and the second support (5-3) is fixed on the clutch.

4. The clutch with the overspeed autonomous protection function of claim 1, wherein: the clutch comprises a driving clutch (2) and a driven clutch (4), wherein a plurality of contact blocks (22) are arranged on one surface, far away from the fixed block (7), of the driving clutch (2), a plurality of mounting grooves (11) are formed in one surface, close to the driving clutch (2), of the driven clutch (4), two buffering modules are oppositely mounted in the mounting grooves (11), the buffering modules are in contact with the contact blocks (22) and used for transmitting power, and the driving clutch (2) is arranged close to the fixed block (7).

5. The clutch with the overspeed autonomous protection function of claim 4, wherein: the buffer module comprises a cover plate (14), a limit block (21) arranged on the cover plate (14), a slide block, a pressure spring (16) and a bottom plate (12), the slide block comprises a guide part (17), a main body part (18) and a connecting part (20) which are connected in sequence, the guide part (17) is in contact transmission with the contact block (22), the limit blocks (21) are arranged on two sides of the main body part (18), the size of the connecting part (20) is larger than the distance between the two limit blocks (21), the bottom plate (12) is arranged in the mounting groove (11), a limit groove (13) is arranged on the bottom plate (12), the pressure spring (16) is arranged in the limit groove (13), one end of the pressure spring (16) is propped against the bottom of the limit groove (13), the other end of the pressure spring is propped against the connecting part (20), the cover plate (14) is fixed on the bottom plate (12) through bolts (15).

6. The clutch with the overspeed autonomous protection function of claim 5, wherein: the guide part (17) is obliquely arranged on one surface contacted with the contact block (22), and two sides of the contact block (22) are also obliquely arranged.

7. The clutch with the overspeed autonomous protection function of claim 4, wherein: the output shaft (3) is fixed at one end of the driven clutch (4) far away from the driving clutch (2), and gears (6) are fixed on the output shaft (3) and the input shaft (1).

8. The clutch with the overspeed autonomous protection function of claim 1, wherein: the elastic mechanism is a spring (10).

Technical Field

The invention relates to the technical field of clutches, in particular to a clutch with an overspeed autonomous protection function.

Background

Clutches are generally used for transmitting and disconnecting power, and the power is generally cut off and transmitted by manual or electric control. However, in practical situations, when the equipment is in operation, sometimes the load is suddenly and significantly reduced or is zero, and at the moment, the rotating speed is suddenly increased in a moment, so that the system is in a fault state. In order to cut off power when the system stalls instantly and reaches a certain value and protect the system, a device is needed to be designed for the transmission system, so that overspeed protection is realized.

Disclosure of Invention

The invention provides a clutch with an over-speed autonomous protection function, aiming at solving the problem that the over-high rotating speed of the clutch can cause system failure, and the clutch comprises an input shaft and a clutch movably arranged on the input shaft, wherein an output shaft is fixed at one end of the clutch far away from the input shaft, a fixed block is fixed on the input shaft, an external spline is arranged at one end of the input shaft, an internal spline is arranged at one end of the clutch close to the input shaft, the clutch is arranged on the external spline in a sliding mode through the internal spline, an elastic mechanism is sleeved on the input shaft, one end of the elastic mechanism props against the fixed block, and the other end of the elastic mechanism props against the clutch; the input shaft is also provided with a plurality of centrifugal control mechanisms, and the centrifugal control mechanisms are used for driving the clutch to slide on the external splines.

Preferably, the centrifugal control mechanism comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is fixed on the fixed block, the other end of the first connecting rod is rotatably arranged on the second connecting rod through a pin shaft, the other end of the second connecting rod is fixed on the clutch, and mass blocks are fixed on two sides of the pin shaft. The rotating mass block of the input shaft generates a certain centrifugal force, the larger the rotating speed is, the larger the centrifugal force is, and the direction of the centrifugal force is perpendicular to the input shaft and faces away from the axis of the input shaft. The user can adjust the quantity of centrifugal control module according to the demand.

Furthermore, the centrifugal control mechanism further comprises a first support and a second support, wherein one end, far away from the pin shaft, of the first connecting rod is hinged to the first support, one end, far away from the pin shaft, of the second connecting rod is hinged to the second support, the first support is fixed on the fixed block, and the second support is fixed on the clutch.

Preferably, the clutch comprises a driving clutch and a driven clutch, wherein one surface of the driving clutch, which is far away from the fixed block, is provided with a plurality of contact blocks, one surface of the driven clutch, which is close to the driving clutch, is provided with a plurality of mounting grooves, two buffer modules are oppositely mounted in the mounting grooves, the buffer modules are in contact with the contact blocks and used for transmitting power, and the driving clutch is close to the fixed block. The contact block extends into the mounting groove to be in contact with the contact module, so that the contact block is transmitted to the driven clutch, one end of the elastic mechanism props against the fixed block, and the other end of the elastic mechanism props against the driven clutch.

Further, the buffer module includes the apron, sets up stopper, slider, pressure spring and bottom plate on the apron, the slider is including guide part, main part and the connecting portion that connect gradually, the guide part with contact block contact transmission, the stopper sets up the both sides of main part, the size of connecting portion is greater than two distance between the stopper, the bottom plate sets up in the mounting groove, be equipped with the spacing groove on the bottom plate, install in the spacing groove the pressure spring, pressure spring one end supports spacing tank bottom, the other end supports connecting portion, the apron passes through the bolt fastening and is in on the bottom plate. The guide part is contacted with the contact block, the contact block extrudes the slide block, the slide block extrudes the pressure spring, the pressure spring is compressed, counter force is applied to the slide block, and the slide block abuts against the contact block, so that the driving clutch rotates to drive the driven clutch to rotate.

Preferably, in order to allow the contact block to be better caught between the two guide portions, the two guide portions are spread apart, a surface of the guide portion contacting the contact block is inclined, and both sides of the contact block are also inclined.

Furthermore, the output shaft is fixed at one end of the driven clutch far away from the driving clutch, and gears are fixed on the output shaft and the input shaft.

Preferably, the elastic mechanism is a spring.

Has the advantages that: 1. the invention designs a centrifugal control mechanism, combines a mass block and a connecting rod mechanism, utilizes the centrifugal force generated by the mass block during rotation, and enables the driving clutch to generate axial component force in the axial direction through the connecting rod structure. When the rotating speed is gradually increased to be close to a set value, the generated axial component force is larger than the axial acting force acted on the driving clutch by the spring for ensuring the initial position of the driving clutch, and at the moment, the driving clutch disc starts to gradually withdraw under the action of the resultant force of the driving clutch disc and the driven clutch disc, and the power transmission between the driving clutch disc and the driven clutch disc is cut off; when the axial component force is smaller than the axial force of the spring, the driving clutch restarts to be meshed with the driven clutch under the action of the resultant force to start to transmit the power;

2. at the power cut-in position of the driven clutch, a vibration damping buffer module is designed, so that when power is separated and engaged, noise and vibration can be remarkably reduced;

3. the critical rotating speed protection value can be changed by changing the weight of the mass block in the clutch control mechanism in the clutch, so that the requirements of different rotating speed protection values are met.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a schematic view of a centrifugal control mechanism of the present invention;

FIG. 4 is a schematic diagram of the driven clutch configuration of the present invention;

FIG. 5 is a disassembled structure view of the driven clutch of the present invention;

FIG. 6 is a diagram of the internal structure of a buffer module according to the present invention;

FIG. 7 is a schematic illustration of an active clutch of the present invention;

in the figure: 1. an input shaft; 2. a main clutch; 3. an output shaft; 4. a driven clutch; 5. a centrifugal control mechanism; 5-1, a mass block; 5-2, connecting rod II; 5-3, a second support; 5-4, connecting rod one; 5-5, a first support; 6. a gear; 7. a fixed block; 8. an external spline; 9. an internal spline; 10. a spring; 11. mounting grooves; 12. a base plate; 13. a limiting groove; 14. a cover plate; 15. a bolt; 16. a pressure spring; 17. a guide portion; 18. a main body portion; 19. a connecting portion; 20. a connecting portion; 21. a limiting block; 22. and a contact block.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example 1

A clutch with an overspeed autonomous protection function comprises an input shaft 1 and a clutch movably arranged on the input shaft 1, wherein an output shaft 3 is fixed at one end, far away from the input shaft 1, of the clutch, a fixed block 7 is fixed on the input shaft 1, an external spline 8 is arranged at one end of the input shaft 1, an internal spline 9 is arranged at one end, close to the input shaft 1, of the clutch, the clutch is arranged on the external spline 8 in a sliding mode through the internal spline 9, an elastic mechanism is sleeved on the input shaft 1, one end of the elastic mechanism abuts against the fixed block 7, and the other end of the elastic mechanism abuts against the clutch; the input shaft 1 is further provided with a plurality of centrifugal control mechanisms 5, and the centrifugal control mechanisms 5 are used for driving the clutch to slide on the external spline 8. The length of the external splines 8 is greater than the length of the internal splines 9 so that the active clutch 2 can slide on the external splines 8 of the input shaft 1.

The centrifugal control mechanism 5 comprises a first connecting rod 5-4 and a second connecting rod 5-2, one end of the first connecting rod 5-4 is fixed on the fixed block 7, the other end of the first connecting rod is rotatably arranged on the second connecting rod 5-2 through a pin shaft, the other end of the second connecting rod 5-2 is fixed on the clutch, and mass blocks 5-1 are fixed on two sides of the pin shaft. The mass 5-1 is rotated by the input shaft 1 to generate a certain centrifugal force, and the centrifugal force is larger when the rotating speed is larger, and the direction of the centrifugal force is perpendicular to the input shaft 1 and faces away from the axis of the input shaft 1. The user can adjust the quantity of centrifugal control module according to the demand.

The centrifugal control mechanism 5 further comprises a first support 5-5 and a second support 5-3, one end, far away from the pin shaft, of the first connecting rod 5-4 is hinged to the first support 5-5, one end, far away from the pin shaft, of the second connecting rod 5-2 is hinged to the second support 5-3, the first support 5-5 is fixed on the fixed block 7, and the second support 5-3 is fixed on the clutch.

The clutch comprises a driving clutch 2 and a driven clutch 4, wherein one surface of the driving clutch 2, which is far away from the fixed block 7, is provided with a plurality of contact blocks 22, one surface of the driven clutch 4, which is close to the driving clutch 2, is provided with a plurality of mounting grooves 11, two buffer modules are relatively mounted in the mounting grooves 11, the buffer modules are in contact with the contact blocks 22 and used for transmitting power, and the driving clutch 2 is close to the fixed block 7. The contact block 22 extends into the mounting groove 11 to contact with the contact module, thereby transmitting power to the driven clutch 4.

Buffer module includes apron 14, sets up stopper 21, slider, pressure spring 16 and bottom plate 12 on the apron 14, the slider is including guide part 17, main part 18 and the connecting portion 20 that connects gradually, guide part 17 with contact block 22 contact transmission, stopper 21 sets up the both sides of main part 18, connecting portion 20's size is greater than two distance between the stopper 21, bottom plate 12 sets up in the mounting groove 11, be equipped with spacing groove 13 on the bottom plate 12, install in the spacing groove 13 the pressure spring 16, 16 one end of pressure spring supports spacing groove 13 bottom, the other end supports connecting portion 20, apron 14 passes through bolt 15 to be fixed on the bottom plate 12. The guide part 17 is in contact with the contact block 22, the contact block 22 extrudes the slide block, the slide block extrudes the pressure spring 16, the pressure spring 16 is compressed, counter force is applied to the slide block, and the slide block abuts against the contact block 22, so that the driving clutch 2 rotates to drive the driven clutch 4 to rotate.

In order to better clamp the contact block 22 between the two guide portions 17, the two guide portions 17 are spread apart, the surface of the guide portion 17 contacting the contact block 22 is inclined, and both sides of the contact block 22 are also inclined.

The output shaft 3 is fixed at one end of the driven clutch 4 far away from the driving clutch 2, and gears 6 are fixed on the output shaft 3 and the input shaft 1.

The elastic mechanism is a spring 10.

The working principle is as follows: the input shaft 1 rotates to drive the mass block 5-1 of the centrifugal control mechanism 5 to rotate, the mass block 5-1 can generate certain centrifugal force, the larger the rotating speed is, the larger the centrifugal force is, and the direction of the centrifugal force is perpendicular to the input shaft 1 and faces to the direction far away from the axis of the input shaft 1. The centrifugal force acts on the connecting rod I5-4 and the connecting rod II 5-2, a component force acting on the connecting rod II 5-2 and parallel to the axial direction of the input shaft 1 is Ft1, the force of the spring 10 is Ft2, and the directions of Ft1 and Ft2 are opposite, when the rotating speed of the input shaft 1 reaches a certain value, Ft1 is greater than Ft2, at the moment, the driving clutch 2 starts to slide towards the fixed block 7 along the spline under the action of a resultant force Ft1-Ft2, so that the driving clutch 2 gradually retreats from being meshed with the power of the driven clutch 4, and finally the power is cut off. When the rotating speed is lower than a certain value, Ft1 is less than Ft2, and the driving clutch 2 moves along the spline in the direction away from the fixed block 7 under the action of the resultant force Ft2-Ft1, gradually returns to the initial position, is engaged with the driven clutch again, and starts to transmit power.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.