Manual-automatic integrated centrifugal clutch

Abstract

The manual-automatic integrated centrifugal clutch comprises a driven part used for being connected with a load and a driving part used for being connected with a power source, and the driven part comprises a driven bowl and an output shaft coaxially connected with the driven bowl. The driving part comprises an input shaft, a centrifugal mechanism and a manual control mechanism, the centrifugal mechanism comprises a plurality of friction assemblies evenly distributed in the circumferential direction of the input shaft, one end of each friction assembly is rotationally connected with the input shaft, and the other end of each friction assembly is provided with a friction plate. An elastic structure is further arranged at the joint of the friction assembly and the input shaft, when the rotating speed of the input shaft changes, the friction assembly can enable the friction plates to be away from or close to each other under the action of centrifugal force, and contact and separation between the friction plates and the inner diameter of the driven bowl are achieved. The manual control mechanism is arranged on the input shaft and used for manually controlling the friction plates to be away from or close to each other, and connection or separation of the driving part and the driven part is achieved. By means of the clutch, the technical problem that an existing manual clutch and an automatic clutch are separated, so that occupied space is too large can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of clutch equipment, in particular to a manual-automatic centrifugal clutch. Background Art

[0002] The clutch is an important part of the locomotive power system. It is installed between the engine and the transmission and is responsible for cutting off and transmitting the power from the engine. According to the different operating methods, the clutch can be divided into automatic clutch and manual clutch. Among them, the common automatic clutch relies on the centrifugal force generated by the rotation and acceleration of the centrifugal body to throw it radially. When the specified angular velocity is reached, the thrown centrifugal body is pressed against the inner wall of the transmission part, and the friction force forces the transmission part to enter the motion state to transmit torque.

[0003] In the prior art, the traditional automatic clutch and manual clutch are separate components. Due to the limited space on the locomotive, the design of the entire vehicle is difficult in terms of spatial arrangement. Summary of the invention

[0004] The purpose of the present invention is to provide a manual-automatic centrifugal clutch, which can solve the technical problem of excessive space occupation caused by the existing manual and automatic clutch separation designs.

[0005] In order to achieve the above object, the present invention adopts the following technical solution.

[0006] A manual-automatic centrifugal clutch comprises a driven part connected to a load and an active part connected to a power source, wherein the driven part comprises a driven wrist and an output shaft coaxially connected to the driven wrist.

[0007] The active part includes an input shaft, a centrifugal mechanism and a manual control mechanism. The centrifugal mechanism is arranged at one end of the input shaft and located in the driven arm. The centrifugal mechanism includes a plurality of friction components evenly distributed along the circumference of the input shaft. One end of the friction component is rotatably connected to the input shaft, and the other end is provided with a friction plate. An elastic structure is also provided at the connection between the friction component and the input shaft. When the speed of the input shaft increases, the friction component can overcome the elastic force of the elastic structure under the action of centrifugal force, so that the friction plates move away from each other and contact the inner diameter of the driven arm, and the driven part is driven to rotate by friction. When the speed of the input shaft decreases, the friction component can, under the action of the elastic structure, make the friction plates move closer to each other and separate from the inner diameter of the driven arm, so that the active part is separated from the driven part.

[0008] The manual control mechanism is arranged on the input shaft, and is used to manually control the friction plates to move away from or towards each other, so as to achieve the engagement or separation of the active part and the driven part.

[0009] Furthermore, the active part is also provided with a synchronization mechanism for making the multiple friction components rotate synchronously relative to the input shaft. The synchronization mechanism includes a sprocket fixed on the friction component and a synchronization chain arranged between the sprockets. The sprocket is arranged at one end of the friction component that is rotatably connected to the input shaft and is coaxial with the rotation axis. The synchronization chain cooperates with the sprockets from the outside of the multiple sprockets to make the multiple sprockets rotate synchronously.

[0010] Furthermore, a slider is provided in the area between two adjacent sprockets of the synchronous chain, and both ends of the slider are respectively hinged to the two ends of the interruption of the synchronous chain. A slide groove is also provided at the end of the input shaft where a centrifugal mechanism is provided. The number of the slide grooves is the same as the number of the sliders and corresponds one to one. The length direction of the slide groove is consistent with the length direction of the slider. When the sprockets rotate synchronously to drive the synchronous chain to move, the slider can slide in the slide groove.

[0011] Furthermore, the manual control mechanism includes a shell slidingly arranged on the input shaft, the shell and the input shaft are circumferentially fixed and can slide axially along the input shaft, a control pin is provided at a position corresponding to the slider on the side of the shell close to the centrifugal mechanism, one end of the control pin is hinged to the shell for swinging the control pin in the sliding direction corresponding to the slider, and the other end is provided with an elastic bayonet, the slider is provided with a connecting slot, and the connecting slot is provided with a connecting column for cooperating with the elastic bayonet, pushing the shell close to the centrifugal mechanism can cause the end of the control pin provided with the elastic bayonet to be inserted into the connecting slot and cooperate with the connecting column, and by controlling the approach or distance between the shell and the centrifugal mechanism, the control pin drives the slider to slide, thereby realizing the mutual distance or approach of the friction plates.

[0012] Furthermore, a thrust structure is provided between the shell and the driven arm. Pushing the shell to overcome the thrust of the thrust structure and approach the centrifugal mechanism can insert the control pin into the connecting slot. Releasing the shell can move away from the centrifugal mechanism under the action of the thrust structure and pull the control pin out of the connecting slot.

[0013] Furthermore, the input shaft is evenly distributed with a plurality of support forks along the circumferential direction, the support forks extend radially along the input shaft, one end of the support fork is fixedly connected to the input shaft, and the other end of the support fork is rotatably connected to the friction assembly, and the friction assembly can swing around the rotating connection in a plane perpendicular to the input shaft to achieve the friction plates moving away from or closer to each other.

[0014] Furthermore, the friction assembly includes a swing rod and a centrifugal body, one end of the swing rod is rotatably connected to the support fork, and the other end is rotatably connected to the centrifugal body, and the friction plate is arranged on a side of the centrifugal body that contacts the inner diameter of the driven wrist.

[0015] Furthermore, the elastic structure is a tension spring arranged between the support fork and the rocker arm.

[0016] Furthermore, the thrust structure includes a spring hole arranged on an end surface of the driven arm facing the housing and a thrust spring arranged in the spring hole, and the spring holes are evenly distributed along the circumferential direction on the end surface of the driven arm.

[0017] Furthermore, a surrounding structure capable of covering the outer diameter of the driven wrist is provided at the outer edge of the shell.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects: 1. The present invention integrates the manual clutch and the automatic clutch into one set of equipment, which has a simple and compact structure, saves space on the locomotive, and is easy to maintain and use; 2. The present invention can realize the switching between manual and automatic clutches through one component, thus enriching the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention (the manual control mechanism is omitted).

[0020] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure in the AA direction (synchronization chain omitted).

[0021] Figure 3 It is a schematic diagram of the overall structure of the input shaft, the slide groove and the support fork in the present invention.

[0022] Figure 4 It is a schematic diagram of the overall structure of the swing rod and the sprocket in the present invention.

[0023] Figure 5 It is a schematic diagram of the overall structure of the centrifugal body and the friction plate in the present invention.

[0024] Figure 6 It is a schematic diagram of the overall structure of the slider and the connecting slot in the present invention.

[0025] Figure 7 It is a schematic diagram of the overall structure of the control pin and the elastic bayonet.

[0026] Figure 8 It is a schematic diagram of the state in which the friction plate and the inner wall of the driven arm are in contact with each other due to the increase in the input shaft speed in the present invention.

[0027] Fig. 9 It is a schematic diagram of the state in which the housing is pushed to insert the control pin into the connecting slot so that the elastic bayonet is matched with the connecting column.

[0028] Description of the drawings: 1. driven wrist, 2. output shaft, 3. input shaft, 31. support fork, 32. slide groove, 41. rocker arm, 42. centrifugal body, 43. friction plate, 44. elastic structure, 51. sprocket, 52. synchronous chain, 53. slider, 54. connecting slot, 55. connecting column, 61. housing, 62. control pin, 63. elastic bayonet, 64. spring hole, 65. thrust spring, 66. surrounding structure. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the features and performances of a manual-automatic centrifugal clutch in the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Please see attached Figures 1 to 8 , a manual-automatic centrifugal clutch comprises a driven part for connecting to a load and an active part for connecting to a power source.

[0031] The driven part includes a driven wrist 1 and an output shaft 2 coaxially connected to the driven wrist 1 .

[0032] The active part includes an input shaft 3, a centrifugal mechanism and a manual control mechanism.

[0033] The centrifugal mechanism is arranged at one end of the input shaft 3 and is located in the driven wrist 1. The centrifugal mechanism includes a plurality of friction components evenly distributed along the circumference of the input shaft 3. The number of friction components can be specifically determined according to the size of the equipment and the usage scenario. Preferably, three friction components are used in this embodiment.

[0034] One end of the friction assembly is rotatably connected to the input shaft 3, and the other end is provided with a friction plate 43. An elastic structure 44 is also provided at the connection between the friction assembly and the input shaft 3. When the speed of the input shaft 3 increases, the friction assembly can overcome the elastic force of the elastic structure 44 under the action of centrifugal force, so that the friction plates 43 move away from each other and contact the inner diameter of the driven arm 1, and the driven part is driven to rotate by friction. When the speed of the input shaft 3 decreases, the friction assembly can, under the action of the elastic structure 44, make the friction plates 43 move closer to each other and separate from the inner diameter of the driven arm 1, so that the active part is separated from the driven part.

[0035] In the specific setting, a plurality of support forks 31 are evenly distributed along the circumferential direction of the input shaft 3, and the support forks 31 extend radially along the input shaft 3. One end of the support fork 31 is fixedly connected to the input shaft 3, and the other end of the support fork 31 is rotatably connected to the friction assembly. The friction assembly can swing around the rotating connection in a plane perpendicular to the input shaft 3 to realize the friction plates 43 moving away from or approaching each other.

[0036] The friction assembly includes a swing rod 41 and a centrifugal body 42. One end of the swing rod 41 is rotatably connected to the support fork 31, and the other end is rotatably connected to the centrifugal body 42. The friction plate 43 is arranged on a side of the centrifugal body 42 that contacts the inner diameter of the driven wrist 1.

[0037] The elastic structure 44 is a tension spring disposed between the support fork 31 and the rocker arm 41 .

[0038] The active part is also provided with a synchronization mechanism for making the multiple friction components rotate synchronously relative to the input shaft 3. The synchronization mechanism includes a sprocket 51 fixedly arranged on the friction component and a synchronization chain 52 arranged between the sprockets 51, the sprocket 51 is arranged at one end of the friction component that is rotatably connected to the input shaft 3 and is coaxial with the rotation axis, and the synchronization chain 52 cooperates with the sprockets 51 from the outside of the multiple sprockets 51 to make the multiple sprockets 51 rotate synchronously.

[0039] The synchronous chain 52 is provided with a slider 53 in the area between two adjacent sprockets 51. The two ends of the slider 53 are respectively hinged to the two ends of the synchronous chain 52. The input shaft 3 is also provided with a slide groove 32 at the end where the centrifugal mechanism is provided. The number of the slide grooves 32 is the same as the number of the sliders 53 and corresponds one to one. The length direction of the slide groove 32 is consistent with the length direction of the slider 53. When the sprocket 51 rotates synchronously to drive the synchronous chain 52 to move, the slider 53 can slide in the slide groove 32.

[0040] The manual control mechanism is arranged on the input shaft 3, and is used to manually control the friction plates 43 to move away from or closer to each other, so as to achieve the engagement or separation of the active part and the driven part.

[0041] The manual control mechanism includes a shell 61 slidably arranged on the input shaft 3. The shell 61 is circumferentially fixed to the input shaft 3 and can slide axially along the input shaft 3. A control pin 62 is provided on the side of the shell 61 close to the centrifugal mechanism at a position corresponding to the slider 53. One end of the control pin 62 is hinged to the shell 61 for swinging the control pin 62 in the sliding direction corresponding to the slider 53. The other end is provided with an elastic bayonet 63. The slider 53 is provided with a connecting slot 54. The connecting slot 54 is provided with a connecting column 55 for cooperating with the elastic bayonet 63. Pushing the shell 61 close to the centrifugal mechanism can make the end of the control pin 62 provided with the elastic bayonet 63 be inserted into the connecting slot 54 and cooperate with the connecting column 55. By controlling the approach or distance between the shell 61 and the centrifugal mechanism, the control pin 62 drives the slider 53 to slide, so that the friction plates 43 can move away from or approach each other.

[0042] A thrust structure is provided between the shell 61 and the driven wrist 1. Pushing the shell 61 to overcome the thrust of the thrust structure and approach the centrifugal mechanism can insert the control pin 62 into the connecting slot 54. Releasing the shell 61 can move away from the centrifugal mechanism under the action of the thrust structure and pull the control pin 62 out of the connecting slot 54.

[0043] The thrust structure includes a spring hole 64 provided on the end surface of the driven arm 1 facing the housing 61 and a thrust spring 65 provided in the spring hole 64 . The spring holes 64 are evenly distributed along the circumferential direction on the end surface of the driven arm 1 .

[0044] A surrounding structure 66 capable of covering the outer diameter of the driven wrist 1 is provided at the outer edge of the housing 61 .

[0045] In specific implementation, the driver can switch the clutch state between automatic clutch and manual clutch according to needs, which is explained below in conjunction with specific embodiments.

[0046] Embodiment 1 When the clutch is required to be in an automatic clutch state, no force close to the centrifugal mechanism is applied to the housing 61. Under the action of the thrust mechanism, the control pin 62 and the connecting slot 54 of the housing 61 are separated.

[0047] When the speed of the input shaft 3 is lower than a certain value, the centrifugal force generated by the centrifugal body 42 is insufficient to overcome the elastic force of the elastic structure 44, and the friction plate 43 is always separated from the inner diameter of the driven arm 1, that is, the clutch is in a state where the driven part and the active part are separated.

[0048] When the speed of the input shaft 3 gradually increases and exceeds a certain value, the centrifugal force generated by the centrifugal body 42 overcomes the elastic force of the elastic structure 44 and moves away from each other, and the friction plate 43 begins to contact the inner diameter of the driven arm 1. At this time, there is a speed difference between the driven part and the active part, and there is sliding friction between the friction plate 43 and the driven arm 1, and the clutch is in a semi-linked state.

[0049] When the speed of the input shaft 3 continues to increase, the higher the speed of the input shaft 3, the greater the centrifugal force generated by the centrifugal body 42, the greater the pressure between the friction plate 43 and the inner diameter of the driven arm 1, and the greater the friction force generated. Under the action of the friction force, the driven part gradually rotates synchronously with the active part, and the clutch is in an engaged state.

[0050] When the rotation speed of the input shaft 3 drops below a certain value, the centrifugal force generated by the centrifugal body 42 is insufficient to overcome the elastic force of the elastic structure 44. The centrifugal bodies 42 move closer to each other under the action of the elastic structure 44, and the friction plate 43 separates from the inner diameter of the driven wrist 1. The clutch returns to a state where the driven part and the active part are separated.

[0051] Embodiment 2 When the clutch is required to be in the manual clutch state, when the machine is stopped, a force close to the centrifugal mechanism is applied to the housing 61, and the housing 61 overcomes the thrust of the thrust mechanism until the control pin 62 is inserted into the connecting slot 54, so that the elastic bayonet 63 cooperates with the connecting column 55.

[0052] Keeping the position of the housing 61 at this time, since the control pin 62 connects the slider 53 and the housing 61 as a whole, even if the speed of the input shaft 3 changes, under the action of the synchronization mechanism, the centrifugal mechanism will still maintain its initial state, that is, the centrifugal bodies 42 approach each other to separate the friction plate 43 from the inner diameter of the driven wrist 1.

[0053] The shell 61 is pushed continuously to overcome the thrust mechanism and approach the centrifugal mechanism, the control pin 62 is deflected, and the slider 53 is pushed to slide along the slide groove 32, and the sprocket 51 is driven to rotate through the synchronous chain 52. The sprocket 51 and the rocker rod 41 rotate synchronously, so that the centrifugal bodies 42 are separated from each other, and the friction plate 43 contacts the inner diameter of the driven wrist 1.

[0054] The greater the displacement of the housing 61 to overcome the thrust mechanism and approach the centrifugal mechanism, the greater the distance that the control pin 62 pushes the slider 53 to slide, the greater the pressure between the friction plate 43 and the inner diameter of the driven wrist 1, and the greater the friction. The driver can control the tightness of the clutch engagement by the force with which the housing 61 is pushed.

[0055] The thrust on the housing 61 is released, and the housing 61 moves away from the centrifugal portion under the action of the thrust mechanism until the control pin 62 is pulled out of the connecting slot 54, and the automatic clutch state is restored.

[0056] When the clutch is in the manual clutch state, the disengagement and engagement of the clutch is only related to the distance that the driver actively controls to push the housing 61 to move, and has nothing to do with the rotation speed of the input shaft 3 .

[0057] A reset mechanism is provided at the rotational connection between the control pin 62 and the housing 61, so that the control pin 62 can always be in the initial position when it is not separated from the connection slot 54, which is convenient for mode switching. The reset mechanism can be a common means such as a torsion spring.

[0058] It should be noted that the parts not described in detail in this scheme are all prior art, and the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A manual-automatic centrifugal clutch, comprising a driven part for connecting to a load and an active part for connecting to a power source, characterized in that: The driven part comprises a driven wrist (1) and an output shaft (2) coaxially connected to the driven wrist (1). The active part comprises an input shaft (3), a centrifugal mechanism and a manual control mechanism. The centrifugal mechanism is arranged at one end of the input shaft (3) and is located in the driven wrist (1). The centrifugal mechanism comprises a plurality of friction components evenly distributed along the circumference of the input shaft (3). One end of the friction component is rotatably connected to the input shaft (3), and the other end is provided with a friction plate (43). An elastic structure (44) is also provided at the connection between the friction component and the input shaft (3). When the speed of the input shaft (3) increases, the friction component can overcome the elastic force of the elastic structure (44) under the action of centrifugal force, so that the friction plates (43) move away from each other and contact the inner diameter of the driven wrist (1), and the driven part is driven to rotate by the friction force. When the speed of the input shaft (3) decreases, the friction component can, under the action of the elastic structure (44), make the friction plates (43) move closer to each other and separate from the inner diameter of the driven wrist (1), so that the active part is separated from the driven part. The manual control mechanism is arranged on the input shaft (3) and is used to manually control the friction plates (43) to move away from or towards each other, thereby achieving engagement or separation between the active part and the driven part.

2. A manual-automatic centrifugal clutch according to claim 1, characterized in that: The active part is also provided with a synchronization mechanism for causing the multiple friction components to rotate synchronously relative to the input shaft (3), the synchronization mechanism comprising a sprocket (51) fixedly arranged on the friction component and a synchronization chain (52) arranged between the sprockets (51), the sprocket (51) being arranged at one end of the friction component rotatably connected to the input shaft (3) and being coaxial with the rotation axis, and the synchronization chain (52) cooperating with the sprockets (51) from the outside of the multiple sprockets (51) for causing the multiple sprockets (51) to rotate synchronously.

3. A manual-automatic centrifugal clutch according to claim 2, characterized in that: The synchronous chain (52) is provided with a slider (53) in the area between two adjacent sprockets (51), and the two ends of the slider (53) are respectively hinged to the two ends of the synchronous chain (52). The input shaft (3) is also provided with a slide groove (32) at one end provided with a centrifugal mechanism. The number of the slide grooves (32) is the same as the number of the sliders (53) and corresponds one to one. The length direction of the slide groove (32) is consistent with the length direction of the slider (53). When the sprocket (51) rotates synchronously to drive the synchronous chain (52) to move, the slider (53) can slide in the slide groove (32).

4. A manual-automatic centrifugal clutch according to claim 3, characterized in that: The manual control mechanism comprises a housing (61) slidably arranged on the input shaft (3). The housing (61) and the input shaft (3) are circumferentially fixed and can slide axially along the input shaft (3). A control pin (62) is provided at a position corresponding to the slider (53) on a side of the housing (61) close to the centrifugal mechanism. One end of the control pin (62) is hingedly connected to the housing (61) for swinging the control pin (62) in a sliding direction corresponding to the slider (53). The other end of the control pin (62) is provided with an elastic bayonet (63). The slider (53) is provided with a connecting slot (54). The connecting slot (54) is provided with a connecting column (55) for cooperating with the elastic bayonet (63). When the housing (61) is pushed close to the centrifugal mechanism, one end of the control pin (62) provided with the elastic bayonet (63) can be inserted into the connecting slot (54) to cooperate with the connecting column (55). By controlling the housing (61) and the centrifugal mechanism to approach or move away from each other, the control pin (62) drives the slider (53) to slide, thereby realizing the mutual movement of the friction plates (43) away from or towards each other.

5. A manual-automatic centrifugal clutch according to claim 4, characterized in that: A thrust structure is provided between the housing (61) and the driven arm (1); pushing the housing (61) to overcome the thrust of the thrust structure and approach the centrifugal mechanism enables the control pin (62) to be inserted into the connecting slot (54); releasing the housing (61) enables the control pin (62) to be pulled out of the connecting slot (54) by moving away from the centrifugal mechanism under the action of the thrust structure.

6. A manual-automatic centrifugal clutch according to claim 1, characterized in that: The input shaft (3) is evenly distributed with a plurality of support forks (31) along the circumferential direction. The support forks (31) extend along the radial direction of the input shaft (3). One end of the support fork (31) is fixedly connected to the input shaft (3), and the other end of the support fork (31) is rotatably connected to the friction assembly. The friction assembly can swing around the rotation connection in a plane perpendicular to the input shaft (3) to achieve mutual separation or proximity of the friction plates (43).

7. A manual-automatic centrifugal clutch according to claim 6, characterized in that: The friction assembly comprises a swing rod (41) and a centrifugal body (42); one end of the swing rod (41) is rotatably connected to the support fork (31), and the other end is rotatably connected to the centrifugal body (42); and the friction plate (43) is arranged on a side of the centrifugal body (42) that contacts the inner diameter of the driven wrist (1).

8. A manual-automatic centrifugal clutch according to claim 7, characterized in that: The elastic structure (44) is a tension spring arranged between the support fork (31) and the swing rod (41).

9. A manual-automatic centrifugal clutch according to claim 5, characterized in that: The thrust structure comprises a spring hole (64) provided on an end surface of the driven arm (1) facing the housing (61) and a thrust spring (65) provided in the spring hole (64); the spring holes (64) are evenly distributed along the circumferential direction on the end surface of the driven arm (1).

10. A manual-automatic centrifugal clutch according to claim 5, characterized in that: An enclosing structure (66) capable of enclosing the outer diameter of the driven wrist (1) is provided at the outer edge of the housing (61).

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