An engine drive device

Abstract

The invention discloses an engine driving device, including an active part and a passive part, wherein the active part includes an active shaft, an active sleeve, and an active wheel, and the inner hole of the active sleeve is a tapered inner hole; the passive part includes a passive sleeve and a passive wheel, and the passive sleeve is slidably sleeved on the active shaft, and the outer wall of the left section of the passive sleeve matches the tapered inner hole of the active sleeve, and a conical limiting convex ring is provided on the middle section of the active shaft, and a limiting groove is provided in the inner hole of the passive sleeve; a plurality of radial through holes are provided on the passive sleeve, and a short shaft is provided in each radial through hole; a plurality of radial locking inner holes are also provided on the outer wall of the left section of the passive sleeve, and a locking pin is provided in each radial locking inner hole; a plurality of radial locking outer holes are provided on the wall of the tapered inner hole of the active sleeve, and when the passive bearing is in the left limit position, the plurality of radial locking outer holes are connected and communicated with the plurality of radial locking inner holes. The invention has the advantages that the active part and the passive part can be quickly engaged or disengaged.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission, and in particular to an engine driving device. Background Art

[0002] In the prior art, the drive device is usually implemented using a multi-stage gear transmission mechanism, a belt transmission mechanism or a clutch mechanism. The application of these mechanisms cannot achieve rapid engagement and disengagement switching of power, and cannot provide timely protection for temporary failures in the transmission. At the same time, the mechanism is relatively complex, the overall weight increases, and the transmission efficiency is poor. In addition, the large size and high complexity of the mechanism will lead to poor reliability and a high failure rate of accessories. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an engine drive device which is safe and reliable, has a stable working state and can achieve rapid engagement or disengagement.

[0004] The present invention is achieved through the following technical solutions:

[0005] An engine driving device includes an active part and a passive part, wherein the active part includes an active shaft, an active shaft sleeve, and an active wheel, and the axial direction of the active shaft is assumed to be a left-right direction.

[0006] The driving sleeve is rotatably sleeved on the driving shaft, the driving wheel is fixedly sleeved on the left end of the driving sleeve, and the inner hole of the driving sleeve is a tapered inner hole with a small left hole and a large right hole;

[0007] The passive part comprises a passive sleeve and a passive wheel. The passive sleeve is slidably sleeved on the active shaft and can slide back and forth along the axial direction of the active shaft. The left section of the passive sleeve extends into the tapered inner hole of the active sleeve, and the outer side wall of the left section of the passive sleeve matches the shape of the tapered inner hole of the active sleeve. The right section of the passive sleeve extends out of the tapered inner hole of the active sleeve and is fixedly sleeved with the passive wheel. A limiting convex ring protruding radially outward is provided on the middle section of the active shaft, and a limiting groove for the limiting convex ring to be embedded is provided in the inner hole of the passive sleeve. The axial dimension of the limiting groove is greater than the axial dimension of the limiting convex ring, and the outer side wall of the limiting boss is in a conical shape with a larger left side and a smaller right side. Correspondingly, the bottom wall of the limiting groove is in a conical shape matched with the outer side wall of the limiting boss. When the passive shaft sleeve is located at the left limit position, the right side wall of the limiting groove fits with the right end face of the limiting convex ring to block the limit; when the passive shaft sleeve is located at the right limit position, the left side wall of the limiting groove fits with the left end face of the limiting convex ring to block the limit; the passive shaft sleeve is in the right limit position in a natural state through the first reset mechanism;

[0008] The passive shaft sleeve is provided with a plurality of radial through holes around the limiting convex ring, and the plurality of radial through holes are evenly distributed along the circumference of the limiting convex ring. A short shaft is provided in each radial through hole, and the shape of the inner end face of the short shaft is consistent with the shape of the outer side wall of the limiting convex ring, and the shape of the outer end face of the short shaft is consistent with the shape of the conical inner hole wall of the active shaft sleeve, and a friction plate is fixed to the outer end face of the short shaft, and the short shaft can move radially in the corresponding radial through hole, and the second reset mechanism is used to reset the short shaft in a natural state toward the direction close to the axis center of the active shaft;

[0009] The passive sleeve is also provided with a plurality of radial locking inner holes on the outer wall of the left section, and the plurality of radial locking inner holes are evenly distributed along the circumference of the passive sleeve, and a locking pin is arranged in each radial locking inner hole; the active sleeve is provided with a plurality of radial locking outer holes on the tapered inner hole wall, and the plurality of radial locking outer holes are evenly distributed along the circumference of the active sleeve, and when the passive bearing is in the left extreme position, the plurality of radial locking outer holes are connected to the plurality of radial locking inner holes in a one-to-one corresponding manner, and the locking pin is completely located in the radial locking inner hole in a natural state through the third reset mechanism; under the action of centrifugal force, the locking pin moves outward until a part of the locking pin is inserted into the radial locking outer hole.

[0010] Furthermore, a first lubricating oil channel is opened inside the active shaft, and a second lubricating oil channel is opened inside the active shaft sleeve. One end of the first lubricating oil channel is connected to the gap between the limiting convex ring and the limiting groove, the other end of the first lubricating oil channel is sealed and connected to one end of the second lubricating oil channel, and the other end of the second lubricating oil channel is externally connected to lubricating oil.

[0011] Furthermore, the first reset mechanism includes a first reset spring, a limiting end plate is provided at the right end of the passive sleeve, and the first reset spring is located between the right end of the active shaft and the limiting end plate of the passive sleeve.

[0012] Furthermore, the second reset mechanism includes a second reset spring, the radial through hole of the passive sleeve is a stepped hole which is larger inside and smaller outside, a limiting ring is provided at the inner end of the short shaft, the second reset spring is sleeved on the short shaft, and the second reset spring is located between the limiting ring of the short shaft and the stepped surface of the radial through hole of the passive sleeve.

[0013] Furthermore, the passive sleeve is a split structure formed by assembling a conical sleeve and a circular sleeve. The conical sleeve is threadedly connected to the circular sleeve. The outer wall of the conical sleeve cooperates with the conical inner hole of the active sleeve. The passive wheel sleeve is mounted on the outer wall of the circular sleeve. The inner wall of the connecting portion of the conical sleeve and the circular sleeve forms the limiting groove.

[0014] Furthermore, the outer side wall of the driving sleeve is in the shape of a stepped shaft with a small left side and a large right side, the driving wheel is mounted on the small shaft end of the driving sleeve, and the inner hole of the small shaft end of the driving sleeve is rotatably mounted on the driving shaft through a bearing.

[0015] Furthermore, the passive shaft sleeve and the active shaft are connected by a spline.

[0016] Furthermore, the third reset mechanism is a third reset spring, and the third reset spring is arranged in the radial locking outer hole, and the locking pin is pressed tightly against the radial locking inner hole by the third reset spring.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention provides an engine drive device, in which conical sliding fit is adopted between the outer wall of the limiting convex ring of the active shaft and the bottom wall of the limiting groove of the passive sleeve, and between the outer wall of the passive sleeve and the inner wall of the active sleeve, so that the axial motion can be converted into radial motion, thereby realizing the rapid engagement or disengagement between the active part and the passive part; and the design of such a two-way conical surface can realize the transition in power transmission, and there is a transition period from the beginning of contact to the middle of contact, which can avoid the impact load caused by the instantaneous power transmission, effectively avoid the damage of parts and components, and improve the reliability of the entire drive device; and the design of such a two-way conical surface has a simple structure, a compact layout, a light overall weight, and a high transmission efficiency.

[0019] 2. An engine drive device provided by the present invention adopts a bidirectional conical surface design and cooperates with multiple short shafts. Power transmission is achieved through the cooperation of the friction plate on the outer end surface of the short shaft and the inner wall of the active shaft sleeve. The friction plate is used as a medium for power transmission, which can slip when the gear is stuck, effectively avoiding the risks of gear damage and shaft breakage; and if the friction plate is worn, it can be quickly replaced, with good maintenance convenience, and the friction plate is inexpensive and easy to obtain, so it can be used in mechanism transmissions in different occasions.

[0020] 3. The present invention provides an engine drive device, which has a plurality of radial locking inner holes on the outer side wall of the passive shaft sleeve, and a plurality of radial locking outer holes on the tapered inner hole wall of the active shaft sleeve. Under the action of centrifugal force, the locking pin will move outward to connect the radial locking inner hole and the radial locking outer hole as a whole, thereby realizing rapid locking of the active part and the driven part, with good locking effect, which can avoid accidents caused by sudden falling off of the entire drive device during rotation.

[0021] 4. An engine drive device provided by the present invention can achieve lubrication of the fitting clearance of two conical surfaces through the first lubricating oil channel and the second lubricating oil channel, and can generate an oil film between two relatively moving parts to reduce friction and power consumption.

[0022] 5. The present invention provides an engine drive device, in which a spline connection is adopted between the passive shaft sleeve and the active shaft, which can realize a large transmission torque and avoid power loss such as slipping. It is suitable for devices with many functional accessories and high power requirements, ensuring transmission accuracy, reducing noise, and improving reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a perspective view of the present invention.

[0024] Figure 2 It is a longitudinal cross-sectional view of the active part and the passive part of the present invention in a joined state.

[0025] Figure 3 It is a longitudinal cross-sectional view of the active part and the passive part of the present invention in a disengaged state.

[0026] Figure 4 yes Figure 2 AA cross-section diagram.

[0027] Figure 5 yes Figure 2 BB cross-section diagram.

[0028] Figure 6 yes Figure 2 CC cross-section diagram.

[0029] Numbers in the figure: 1 driving shaft, 2 driving sleeve, 3 driving wheel, 4 bearing, 5 tapered sleeve, 6 circular sleeve, 7 driven wheel, 8 limiting convex ring, 9 limiting groove, 10 radial through hole, 11 short shaft, 12 friction plate, 13 radial locking inner hole, 14 locking pin, 15 radial locking outer hole, 16 spline, 17 first lubricating oil channel, 18 second lubricating oil channel, 19 first return spring, 20 limiting end plate, 21 second return spring, 22 third return spring. DETAILED DESCRIPTION

[0030] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0031] See also Figures 1 to 6 , this embodiment discloses an engine driving device, including an active part and a passive part.

[0032] The driving part includes a driving shaft 1, a driving sleeve 2, and a driving wheel 3. The axial direction of the driving shaft 1 is assumed to be the left-right direction. The driving sleeve 2 is rotatably mounted on the driving shaft 1, and the driving wheel 3 is fixedly mounted on the left end of the driving sleeve 2. The inner hole of the driving sleeve 2 is a tapered inner hole with a small left side and a large right side. Among them, the outer wall of the driving sleeve 2 is a stepped shaft shape with a small left side and a large right side. The driving wheel 3 is fixedly mounted on the small shaft end of the driving sleeve 2, and the inner hole of the small shaft end of the driving sleeve 2 is rotatably mounted on the driving shaft 1 through the bearing 4.

[0033] The passive part includes a passive sleeve and a passive wheel 7. The passive sleeve is slidably mounted on the active shaft 1 and can slide back and forth along the axial direction of the active shaft 1. The passive sleeve and the active shaft 1 are connected by a spline 16. The left section of the passive sleeve extends into the tapered inner hole of the active sleeve 2, and the outer wall of the left section of the passive sleeve matches the shape of the tapered inner hole of the active sleeve 2. The right section of the passive sleeve extends out of the tapered inner hole of the active sleeve 2 and is fixedly mounted with the passive wheel 7. A limiting convex ring 8 protruding radially outward is provided on the middle section of the active shaft 1. A limiting groove 9 is provided in the inner hole of the passive sleeve for the limiting convex ring 8 to be embedded. The axial dimension of the limiting groove 9 is greater than the axial dimension of the limiting convex ring 8. The outer wall of the platform is in a conical shape with a larger left side and a smaller right side. Correspondingly, the bottom wall of the limiting groove 9 is in a conical shape that matches the outer wall of the limiting boss. When the passive sleeve is located at the left extreme position, the right side wall of the limiting groove 9 fits with the right end face of the limiting convex ring 8 to block the limiting position; when the passive sleeve is located at the right extreme position, the left side wall of the limiting groove 9 fits with the left end face of the limiting convex ring 8 to block the limiting position; through the first reset mechanism, the passive sleeve is in the right extreme position in a natural state.

[0034] The passive sleeve is provided with a plurality of radial through holes 10 around the limiting convex ring 8. In the present embodiment, four radial through holes 10 are designed. The four radial through holes 10 are evenly distributed along the circumference of the limiting convex ring 8. A short shaft 11 is provided in each radial through hole 10. The inner end face shape of the short shaft 11 is consistent with the outer side wall shape of the limiting convex ring 8. The outer end face shape of the short shaft 11 is consistent with the shape of the tapered inner hole wall of the active sleeve 2. A friction plate 12 is fixed to the outer end face of the short shaft 11. The short shaft 11 can move radially in the corresponding radial through hole 10. The second reset mechanism is used to reset the short shaft 11 in a natural state toward the direction close to the axis center of the active shaft 1.

[0035] A plurality of radial locking inner holes 13 are also formed on the outer wall of the left section of the passive sleeve. In the present embodiment, four radial locking inner holes 13 are designed. The four radial locking inner holes 13 are evenly distributed along the circumference of the passive sleeve. A locking pin 14 is arranged in each radial locking inner hole 13. Four radial locking outer holes 15 are formed on the conical inner hole wall of the active sleeve 2. The four radial locking outer holes 15 are evenly distributed along the circumference of the active sleeve 2. When the passive bearing 4 is in the left extreme position, the four radial locking outer holes 15 are connected to the four radial locking inner holes 13 in a one-to-one corresponding manner. The locking pin 14 is completely located in the radial locking inner hole 13 in a natural state through the third reset mechanism. Under the action of centrifugal force, the locking pin 14 moves outward until a part of the locking pin 14 is inserted into the radial locking outer hole 15.

[0036] Specifically, for the convenience of assembly, the passive sleeve is a split structure assembled from a tapered sleeve 5 and a circular sleeve 6. The tapered sleeve 5 and the circular sleeve 6 are threadedly connected. The outer wall of the tapered sleeve 5 cooperates with the tapered inner hole of the active sleeve 2. The passive wheel 7 is mounted on the outer wall of the circular sleeve 6. The inner wall of the connecting portion of the tapered sleeve 5 and the circular sleeve 6 forms a limiting groove 9.

[0037] Specifically, a first lubricating oil passage 17 is opened inside the driving shaft 1, and a second lubricating oil passage 18 is opened inside the driving shaft sleeve 2. One end of the first lubricating oil passage 17 is connected to the gap between the limiting convex ring 8 and the limiting groove 9, and the other end of the first lubricating oil passage 17 is sealed and connected to one end of the second lubricating oil passage 18, and the other end of the second lubricating oil passage 18 is sealed and connected to the oil passage of the cylinder body. Lubricating oil is introduced into the second lubricating oil passage 18 through the oil passage of the cylinder body, and no external lubrication source is required, thereby saving the cost increase caused by the additional lubrication device.

[0038] Specifically, the first reset mechanism includes a first reset spring 19, a limit end plate 20 is provided at the right end of the passive sleeve, and the first reset spring 19 is located between the right end of the active shaft 1 and the limit end plate 20 of the passive sleeve. The first reset spring 19 is used to adjust and buffer the left and right movement of the passive sleeve.

[0039] The second reset mechanism includes a second reset spring 21. The radial through hole 10 of the passive sleeve is a stepped hole with a larger inner side and a smaller outer side. A limiting ring is provided at the inner end of the short shaft 11. The second reset spring 21 is sleeved on the short shaft 11, and the second reset spring 21 is located between the limiting ring of the short shaft 11 and the stepped surface of the radial through hole 10 of the passive sleeve.

[0040] The third reset mechanism is a third reset spring 22 . The third reset spring 22 is disposed in the radial locking outer hole 15 , and the lock pin 14 is pressed tightly against the radial locking inner hole 13 by the third reset spring 22 .

[0041] When working, the driving device is installed in the gear chamber of the cylinder body, the driving wheel 3 of the driving device is connected to the driving source, and the driven wheel of the driving device is meshed with the transmission gear. The driving device is used to realize the rapid engagement or disengagement of the power between the driving source and the transmission gear. The specific process is as follows:

[0042] The passive sleeve is pushed to the left, the passive sleeve moves to the left, and the four short shafts 11 move to the left along the conical surface of the limiting convex ring 8. In this process, the four short shafts 11 expand radially outward, so that the friction plates 12 on the outer end surfaces of the four short shafts 11 are closely attached to the hole wall of the conical inner hole of the active sleeve 2. At this time, the passive sleeve is engaged with the active sleeve 2, and the passive bearing 4 will rotate with the active sleeve 2; at the same time, under the action of centrifugal force, the centrifugal force overcomes the elastic force of the third reset spring 22, and drives the four lock pins 14 to move outward until a part of the lock pins 14 is inserted into the radial locking outer hole 15, realizing the reverse buckle safety, and preventing the active part and the passive part from being accidentally disengaged. That is, the engagement is completed.

[0043] When the driving wheel 3 rotates at a low speed or stops rotating, the elastic force of the third return spring 22 overcomes the centrifugal force, and the four locking pins 14 are disengaged from the radial locking outer hole 15 under the action of the third return spring 22, and completely enter the radial locking inner hole 13; at this time, under the action of the first return spring 19, the passive sleeve moves to the right and resets; in this process, under the action of the second return spring 21, the four short shafts 11 move radially inward, so that the friction plates 12 at the outer ends of the four short shafts 11 are disengaged from the hole wall of the tapered inner hole of the driving sleeve 2, and the active part and the passive part are completely disengaged.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine drive device, comprising an active part and a passive part, characterized in that: The active part comprises an active shaft (1), an active shaft sleeve (2), and an active wheel (3), and the axial direction of the active shaft (1) is assumed to be the left-right direction. The driving sleeve (2) is rotatably sleeved on the driving shaft (1), the driving wheel (3) is fixedly sleeved on the left end of the driving sleeve (2), and the inner hole of the driving sleeve (2) is a tapered inner hole with a smaller left side and a larger right side; The passive part comprises a passive shaft sleeve and a passive wheel (7); the passive shaft sleeve is slidably sleeved on the active shaft (1) and can slide back and forth along the axial direction of the active shaft (1); the left section of the passive shaft sleeve extends into the conical inner hole of the active shaft sleeve (2), and the outer wall of the left section of the passive shaft sleeve matches the shape of the conical inner hole of the active shaft sleeve (2); the right section of the passive shaft sleeve extends out of the conical inner hole of the active shaft sleeve (2) and is fixedly sleeved with the passive wheel (7); a limiting convex ring (8) protruding radially outward is provided on the middle section of the active shaft (1); a limiting groove (8) for the limiting convex ring (8) to be embedded is provided in the inner hole of the passive shaft sleeve 9), the axial dimension of the limiting groove (9) is greater than the axial dimension of the limiting convex ring (8), the outer side wall of the limiting convex ring (8) is in a conical shape with a larger left side and a smaller right side, and correspondingly, the bottom wall of the limiting groove (9) is in a conical shape that matches the outer side wall of the limiting convex ring (8), when the passive shaft sleeve is located at the left limit position, the right side wall of the limiting groove (9) fits with the right end face of the limiting convex ring (8) to block the limit; when the passive shaft sleeve is located at the right limit position, the left side wall of the limiting groove (9) fits with the left end face of the limiting convex ring (8) to block the limit; and the passive shaft sleeve is placed in the right limit position in a natural state by a first reset mechanism; The passive shaft sleeve is provided with a plurality of radial through holes (10) around the limiting convex ring (8), the plurality of radial through holes (10) being evenly distributed along the circumference of the limiting convex ring (8), a short shaft (11) being provided in each radial through hole (10), the inner end surface shape of the short shaft (11) being consistent with the outer wall shape of the limiting convex ring (8), the outer end surface shape of the short shaft (11) being consistent with the shape of the conical inner hole wall of the active shaft sleeve (2), and a friction plate (12) being fixed to the outer end surface of the short shaft (11), the short shaft (11) being able to move radially in the corresponding radial through hole (10), and the short shaft (11) being reset in a natural state in a direction close to the axis center of the active shaft (1) by a second reset mechanism; The passive sleeve is also provided with a plurality of radial locking inner holes (13) on the outer wall of the left section, the plurality of radial locking inner holes (13) being evenly distributed along the circumference of the passive sleeve, and a locking pin (14) being arranged in each radial locking inner hole (13); the active sleeve (2) is provided with a plurality of radial locking outer holes (15) on the conical inner hole wall, the plurality of radial locking outer holes (15) being evenly distributed along the circumference of the active sleeve (2), and when the passive sleeve is in the left limit position, the plurality of radial locking outer holes (15) are connected to the plurality of radial locking inner holes (13) in a one-to-one corresponding manner, and the locking pin (14) is completely located in the radial locking inner hole (13) in a natural state through a third reset mechanism; under the action of centrifugal force, the locking pin (14) moves outward until a portion of the locking pin (14) is inserted into the radial locking outer hole (15).

2. An engine drive device as claimed in claim 1, characterized in that: A first lubricating oil passage (17) is formed inside the driving shaft (1), and a second lubricating oil passage (18) is formed inside the driving shaft sleeve (2). One end of the first lubricating oil passage (17) is connected to the gap between the limiting convex ring (8) and the limiting groove (9). The other end of the first lubricating oil passage (17) is sealed and connected to one end of the second lubricating oil passage (18). The other end of the second lubricating oil passage (18) is externally connected to lubricating oil.

3. An engine drive device as claimed in claim 1, characterized in that: The first reset mechanism comprises a first reset spring (19), a limiting end plate (20) is provided at the right end of the passive shaft sleeve, and the first reset spring (19) is located between the right end of the active shaft (1) and the limiting end plate (20) of the passive shaft sleeve.

4. An engine drive device as claimed in claim 1, characterized in that: The second reset mechanism comprises a second reset spring (21); the radial through hole (10) of the passive shaft sleeve is a stepped hole with a larger inner portion and a smaller outer portion; a limiting ring is provided at the inner end of the short shaft (11); the second reset spring (21) is sleeved on the short shaft (11); and the second reset spring (21) is located between the limiting ring of the short shaft (11) and the stepped surface of the radial through hole (10) of the passive shaft sleeve.

5. An engine drive device as claimed in claim 1, characterized in that: The passive shaft sleeve is a split structure assembled from a tapered shaft sleeve (5) and a circular shaft sleeve (6); the tapered shaft sleeve (5) and the circular shaft sleeve (6) are threadedly connected, and the outer wall of the tapered shaft sleeve (5) is matched with the tapered inner hole of the active shaft sleeve (2); the passive wheel (7) is sleeved on the outer wall of the circular shaft sleeve (6); and the inner wall of the portion where the tapered shaft sleeve (5) and the circular shaft sleeve (6) are connected forms the limiting groove (9).

6. An engine drive device as claimed in claim 1, characterized in that: The outer wall of the driving shaft sleeve (2) is in the shape of a stepped shaft with a small left side and a large right side. The driving wheel (3) is mounted on the small shaft end of the driving shaft sleeve (2). The inner hole of the small shaft end of the driving shaft sleeve (2) is rotatably sleeved on the driving shaft (1) through a bearing (4).

7. An engine drive device as claimed in claim 1, characterized in that: The passive shaft sleeve and the active shaft (1) are connected by a spline (16).

8. An engine drive device as claimed in claim 1, characterized in that: The third reset mechanism is a third reset spring (22), which is arranged in the radial locking outer hole (15), and the lock pin (14) is pressed tightly against the radial locking inner hole (13) by the third reset spring (22).

Images