A clutch protection device

Abstract

The application relates to the field of clutch devices, and particularly discloses a clutch protection device which comprises a driving gear for outputting power, a driven assembly driven by the driving gear and two clutch pins for being fixed on equipment. The application has the effect of completely eliminating the influence of motor inertia on the equipment.

Description

Technical Field

[0001] The present application relates to the field of clutch devices, and in particular to a clutch protection device. Background Art

[0002] When the operating shaft of the equipment is driven to rotate by a motor, a reducer, a coupling or a gear plate is often provided on the output shaft of the motor to drive the operating shaft of the equipment to rotate.

[0003] In related technologies, such as Figure 1 The illustrated drive device includes a drive motor 5, a driving gear plate 51 connected to the output shaft of the drive motor 5, and a driven gear plate 52 for connecting to the device's operating shaft. The driving gear plate 51 meshes with the driven gear plate 52. When the drive motor 5 is started, the output shaft of the drive motor 5 drives the device's operating shaft to rotate via the first gear plate 51 and the driven gear plate 52.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: when the above-mentioned driving device drives the operating shaft of a device that needs to rotate forward and reverse within a certain angle, such as the closing and opening operating shaft used in the spring operating mechanism, after the driving motor drives the operating shaft to rotate to an appropriate angle and stops, the output shaft of the driving motor continues to apply force to the operating shaft to drive the operating shaft to rotate under the action of inertia, which can easily cause damage to the equipment and needs to be improved. Summary of the Invention

[0005] In order to reduce the impact of motor inertia on equipment, the present application provides a clutch protection device.

[0006] The present application provides a clutch protection device that adopts the following technical solution:

[0007] A clutch protection device comprising

[0008] Active large gear, used for outputting power;

[0009] The driven assembly includes a drive disc, a drive pawl, and a reset elastic member. The drive disc rotates coaxially with the driving gear and is used to be connected to the device operating shaft. The drive pawl is provided with a forward drive end and a reverse drive end facing opposite directions. The drive pawl is rotatably connected to the drive disc. The reset elastic member is used to drive the forward drive end or the reverse drive end to rotate toward the driving gear. The driving gear is provided with a forward ratchet groove for the forward drive end to extend into and a reverse ratchet groove for the reverse drive end to extend into.

[0010] The clutch pin is arranged on the rotation path of the driving pawl and is used to abut the driving pawl to change the directions of the forward driving end and the reverse driving end.

[0011] By adopting the technical scheme, when the operation shaft is rotated by the motor driving operation, the motor is first started to drive the gear disc on the motor output shaft to rotate, the gear disc drives the driving gear wheel meshed therewith to rotate;

[0012] When the driving gear wheel rotates forward, the driving pawl moves relative to the driving gear wheel to move the forward driving end to the direction close to the forward ratchet groove, and when the forward driving end is aligned with the forward ratchet groove, the forward driving end rotates to the direction close to the driving gear wheel under the action of the reset elastic element to extend into the forward ratchet groove, and the driving gear wheel drives the driving disc to rotate through the driving pawl, thereby driving the operation shaft to rotate; when the driving pawl rotates to abut against the clutch pin, the clutch pin rotates the forward driving end to the direction away from the driving gear wheel and the reverse driving end to the direction close to the driving gear wheel, so that the forward driving end moves out of the forward ratchet groove, and even if the motor output shaft continues to drive the driving gear wheel to rotate under the action of inertia, the driving disc will not rotate, thereby protecting the operation shaft;

[0013] Similarly, when the driving gear wheel reverses, the reverse driving end extends into the reverse ratchet groove, so that the motor can drive the operation shaft to reverse, and after the driving pawl abuts against the clutch pin, the motor output shaft cannot rotate the operation shaft.

[0014] When the motor fails to automatically stop or the motor output shaft continues to rotate due to inertia after stopping, the above structure protects the operation shaft and the equipment, reducing the influence of the motor inertia on the equipment. The clutch protection device of the application can be applied to various motors, so that the motor with only single rotation function can realize the clutch function, improving the adaptability of the motor.

[0015] Optionally, the clutch pin is provided with two.

[0016] By adopting the above technical scheme, the driving disc cannot continue to rotate after rotating a certain angle. By changing the included angle between the two clutch pins and the connecting line of the rotating shaft, the adaptability of the clutch protection device is improved, so that it can be adapted to operation shafts with different rotation angles.

[0017] Optionally, the driving gear wheel is provided with a rotating hole for the rotation of the driving disc.

[0018] By adopting the above technical scheme, the rotating hole plays a positioning role in the rotation of the driving gear wheel, which is helpful for the coaxial rotation of the driving gear wheel and the driving disc.

[0019] Optionally, the forward ratchet groove and the reverse ratchet groove are both towards the driving disc, the forward ratchet groove is from shallow to deep along one of the rotation directions of the driving gear wheel, and the reverse ratchet groove is from shallow to deep along the other rotation direction of the driving gear wheel.

[0020] By adopting the technical scheme, compared with the forward and reverse ratchet grooves with consistent groove depth, the structure from shallow to deep enables the forward driving end to stably enter the forward ratchet groove and the reverse driving end to stably enter the reverse ratchet groove.

[0021] Optionally, the driving disc comprises a disc body and a rotating part connected to the disc body, the driving pawl is rotatably connected to the rotating part, and the disc body and the rotating part form a clearance groove for rotatably arranging the forward driving end and the reverse driving end.

[0022] By adopting the technical scheme, the clearance groove plays a clearance role, so that the forward driving end and the reverse driving end are not easily interfered by the disc body when the pawl body rotates.

[0023] Optionally, a connecting hole is formed in the driving pawl for inserting the rotating part.

[0024] By adopting the technical scheme, compared with connecting the driving pawl to the sidewall of the driving disc, when connecting the driving pawl and the driving disc, the rotating part is inserted into the connecting hole, thereby improving the stability of the driving pawl when rotating.

[0025] Optionally, a pin shaft is arranged on the rotating part, a rod part of the pin shaft penetrates the driving pawl and the rotating part, a snap spring is connected to the pin shaft, and a clamping groove is arranged on the pin shaft for extending the end part of the E-shaped clasp ring.

[0026] By adopting the technical scheme, when connecting the driving pawl and the rotating part, the rotating part is first inserted into the connecting hole, then the rod part of the pin shaft penetrates the driving pawl and the rotating part, and finally the end part of the snap spring is inserted into the clamping groove, the head part of the snap spring and the pin shaft limits the separation of the driving pawl and the rotating part. Through the above structure, it is convenient for the staff to connect the driving pawl and the rotating part.

[0027] Optionally, the reset elastic member comprises a protrusion with elasticity, the driving pawl comprises a switching end for abutting against the clutch pin and a limiting end for abutting against the protrusion, and one side of the protrusion abuts against the limiting end.

[0028] By adopting the technical scheme, when the pawl body rotates with the driving disc to the switching end abutting against the clutch pin, the pawl body rotates relative to the driving disc as the driving gear continues to rotate, on one hand, the orientation of the forward driving end and the reverse driving end is changed, and on the other hand, the limiting end moves relative to the protrusion so that the other side of the protrusion contacts the limiting end.

[0029] Optionally, an installation hole is formed in the reset elastic member for inserting the rotating part and the end part of the disc body.

[0030] By adopting the technical scheme, when the reset elastic member is installed, the rotating part and the end part of the disc body are inserted into the installation hole, so that the staff can be facilitated to install.

[0031] Optionally, the reset elastic member further comprises limiting parts connected to two sides of the protrusion, and two limiting grooves are formed in the disc body, and the two limiting parts respectively abut against the side walls of the adjacent limiting grooves.

[0032] By adopting the technical scheme, after the rotating part is inserted into the installation hole, the two limiting parts respectively abut against the side walls of the two different limiting grooves, so that the reset elastic member is not easy to displace due to the extrusion deformation of the protrusion, and the stability of the reset elastic member during use is improved.

[0033] In summary, the present application has at least the following beneficial effects:

[0034] 1. By the pawl assembly, the clutch pin and the forward and reverse ratchet grooves formed in the driving gear, the driving disc is not rotated even if the motor or the handle continues to drive the driving gear to rotate after the driving disc drives the operation shaft to rotate to a certain angle; through the above structure, the first aspect reduces the influence of motor inertia on the equipment, the second aspect reduces the influence of staff misoperation on the equipment, and the third aspect improves the adaptability of the motor;

[0035] 2. By the two clutch pins, the rotation angle of the driving disc can be limited, and the adaptability of the clutch protection device of the present application is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic view of the background technology.

[0037] Figure 2 is a structural schematic view of the embodiment of the present application.

[0038] Figure 3 is a structural schematic view of the driving disc in the embodiment of the present application.

[0039] Figure 4 is an exploded schematic view of the driving pawl, the reset elastic member, the pin shaft and the snap spring in the embodiment of the present application.

[0040] EXPLANATION OF REFERENCE NUMERALS:

[0041] 1, driving gear; 11, forward ratchet groove; 12, reverse ratchet groove; 13, rotating hole; 2, driven assembly; 21, driving disc; 211, disc body; 2111, limiting groove; 2112, hexagonal hole; 212, rotating part; 213, pin shaft; 2131, clamping groove; 214, clamping spring; 215, accommodation groove; 22, driving pawl; 221, connecting part; 222, forward driving end; 223, reverse driving end; 224, switching end; 225, limiting end; 226, connecting hole; 23, reset elastic member; 231, protrusion; 232, limiting part; 233, mounting hole; 3, clutch pin; 31, forward pin; 32, reverse pin; 4, connecting assembly; 41, flat washer; 42, flat head rivet; 5, driving motor; 51, driving gear disc; 52, driven gear disc. DETAILED DESCRIPTION

[0042] The application will be further described in detail below with reference to the accompanying drawings. Figures 2-4 The application will be further described in detail below with reference to the accompanying drawings.

[0043] The application discloses a clutch protection device. Referring to Figure 1 , the clutch protection device comprises a driving gear 1 for outputting power, a driven assembly 2 driven by the driving gear 1, and two clutch pins 3 for being fixed on a device.

[0044] Referring to Figure 2 , the driving gear 1 is used for engaging with a gear disc connected to a motor or a gear disc connected to a handle, and starting the motor or rotating the handle, so that the driving gear 1 is driven to rotate clockwise or counterclockwise along the axial line of the driving gear 1 through the gear disc. The rotating hole 13 is through the driving gear 1, and the axial line of the rotating hole 13 is collinear with the axial line of the driving gear 1. The forward ratchet groove 11 and the reverse ratchet groove 12 are arranged on the hole wall of the rotating hole 13, the forward ratchet groove 11 is shallow to deep along the clockwise rotation direction of the driving gear 1, and the reverse ratchet groove 12 is shallow to deep along the counterclockwise rotation direction of the driving gear 1. The “clockwise” and “counterclockwise” in the description are based on the view angle shown in the drawings. Figure 2

[0045] Referring to Figure 2 ​The driven assembly 2 comprises a driving disc 21 rotating coaxially with the driving gear 1, a driving pawl 22 rotatingly connected to the driving disc 21, and a reset elastic member 23 connected to the driving disc 21. The driving disc 21 is rotationally arranged in the rotating hole 13, and the driving disc 21 is provided with three sets of connecting assemblies 4 which are evenly distributed along the rotation axis of the driving disc 21. The connecting assembly 4 comprises two flat washers 41 and a flat head rivet 42 connected to the two flat washers 41, and the two flat washers 41 are respectively in contact with two opposite side walls of the driving disc 21 and are respectively in contact with two opposite side walls of the driving gear 1. The rod part of the flat head rivet 42 penetrates the driving disc 21 and the two flat washers 41, one of the flat washers 41 is in contact with the head part of the flat head rivet 42, and the other flat washer 41 is fixedly connected to the flat head rivet 42. Through the connecting assembly 4, the relative movement of the driving gear 1 and the driving disc 21 along the rotation axis is limited, and the stability of the driving gear 1 and the driving disc 21 during use is improved.

[0046] Referring to Figure 2 , Figure 3 , the driving disc 21 comprises a disc body 211 and a rotating part 212 integrally formed on the disc body 211, and two accommodation grooves 215 are formed between the rotating part 212 and the disc body 211, and the two accommodation grooves 215 are respectively located on the two sides of the rotating part 212. A hexagonal hole 2112 is formed in the disc body 211, the central axis of the hexagonal hole 2112 is collinear with the axis of the driving gear 1, and the hexagonal hole 2112 is used for inserting the output shaft of the equipment.

[0047] Referring to Figure 3 , Figure 4 , the driving pawl 22 penetrates a connecting hole 226, and the connecting hole 226 is used for inserting the rotating part 212. The driving pawl 22 comprises an integral connecting part 221, a forward driving end 222, a reverse driving end 223, a switching end 224 and a limiting end 225. The rotating part 212 is connected with a pin shaft 213, the head part of the pin shaft 213 is wider than the rod part of the pin shaft 213, and the rod part of the pin shaft 213 is a cylinder, and the rod part of the pin shaft 213 penetrates the connecting part 221 and the rotating part 212. A clamping groove 2131 is formed on the circumferential outer wall of the rod part of the pin shaft 213, and the clamping groove 2131 is located at the end of the rod part of the pin shaft 213 away from the head part. The pin shaft 213 is connected with a clamping spring 214, the end part of the clamping spring 214 is inserted into the clamping groove 2131, and the head part of the clamping spring 214 and the pin shaft 213 is respectively in contact with the two opposite side walls of the connecting part 221.

[0048] Referring to Figure 3 , Figure 4When the driving pawl 22 and the driving disc 21 are connected, the rotating part 212 is inserted into the connecting hole 226, the rod part of the pin shaft 213 is arranged in the rotating part 212 and the connecting part 221, and finally the snap spring 214 is connected with the clamping groove 2131.

[0049] With reference to Figure 3 , Figure 4 The forward driving end 222, the reverse driving end 223, the switching end 224 and the limiting end 225 are connected on the side wall of the connecting part 221 along the rotating direction. The forward driving end 222 and the reverse driving end 223 are connected on the two sides of the connecting part 221 respectively, and the directions of the forward driving end 222 and the reverse driving end 223 are opposite. The two limiting grooves 215 are used for rotatingly arranging the forward driving end 222 and the reverse driving end 223 respectively. The forward ratchet groove 11 is used for extending the forward driving end 222, and the reverse ratchet groove 12 is used for extending the reverse driving end 223.

[0050] With reference to Figure 2 , Figure 4 The switching end 224 is connected on the side of the connecting part 221 facing the driving gear wheel 1, and the limiting end 225 is connected on the side of the connecting part 221 facing the disc body 211.

[0051] With reference to Figure 2 , Figure 4 The reset elastic member 23 is a special-shaped spring. The reset elastic member 23 is provided with the mounting hole 233 for inserting the rotating part 212 and the end part of the disc body 211. The reset elastic member 23 is a spring sheet with elasticity. The reset elastic member 23 comprises the protrusion 231 and the two limiting parts 232 connected on the two sides of the protrusion 231 respectively, and the protrusion 231 and the two limiting parts 232 are integrally formed. The limiting end 225 is used for abutting against the protrusion 231, and the protrusion 231 is arc-shaped and faces the driving pawl 22. The two sides of the protrusion 231 are located on the rotating path of the limiting end 225, and one side of the protrusion 231 abuts against the limiting end 225. When the limiting end 225 rotates, the protrusion 231 is pressed to rotate from one side to the other side of the protrusion 231. The protrusion 231 is used for driving the forward driving end 222 or the reverse driving end 223 to rotate towards the driving gear wheel 1.

[0052] With reference to Figure 3 , Figure 4 The disc body 211 is provided with the two limiting grooves 2111 located on the two sides of the rotating part 212 respectively. When the rotating part 212 and the end part of the disc body 211 are inserted into the mounting hole 233, the hole wall of the mounting hole 233 abuts against the groove wall of the limiting groove 2111, and the opposite side walls of the two limiting parts 232 abut against the groove walls of the different limiting grooves 2111 respectively.

[0053] With reference to Figure 2 ,Figure 4 The two clutch pins 3 are respectively a forward pin 31 and a reverse pin 32. The forward pin 31 and the reverse pin 32 are arranged on the rotation path of the switching end 224 and can abut against the switching end 224. When the switching end 224 abuts against the forward pin 31, the forward driving end 222 rotates towards the driving gear 1 and the reverse driving end 223 rotates towards the disc 211. When the switching end 224 abuts against the reverse pin 32, the reverse driving end 223 rotates towards the driving gear 1 and the forward driving end 222 rotates towards the disc 211.

[0054] The implementation principle of the clutch protection device is as follows: when the driving gear 1 is driven to rotate forward by the motor or the handle, the driving gear 1 rotates. When the driving gear 1 rotates to the position where the forward ratchet groove 11 is aligned with the forward driving end 222, the forward driving end 222 is inserted into the forward ratchet groove 11 under the action of the protrusion 231 and drives the driving disc 21 to rotate forward, thereby driving the output shaft of the equipment to rotate forward. When the driving pawl 22 rotates under the action of the driving disc 21, the switching end 224 abuts against the reverse pin 32 and drives the driving pawl 22 to rotate along the pin shaft 213, so that the forward driving end 222 moves out of the forward ratchet groove 11 and rotates towards the driving disc 21, the reverse driving end 223 rotates towards the driving gear 1, and the limiting end 225 rotates to abut against the other side of the protrusion 231. At this time, even if the driving gear 1 continues to rotate forward, the driving disc 21 will not rotate.

[0055] Similarly, when the driving gear 1 rotates reversely, the driving disc 21 is driven to rotate reversely by the reverse driving end 223 and the reverse ratchet groove 12 until the switching end 224 abuts against the forward pin 31. At this time, even if the driving gear 1 continues to rotate reversely, the driving disc 21 will not rotate.

[0056] When the motor fails to stop automatically or the output shaft of the motor continues to rotate due to inertia after stopping, or the operating shaft continues to rotate after rotating to a certain angle, the above structure can protect the operating shaft and the equipment, which not only reduces the influence of the inertia of the motor on the equipment, but also reduces the influence of the misoperation of the operator on the equipment.

[0057] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A clutch protection device characterized by: The utility model relates to a driving gear (1) for output power, a driven assembly (2) including driving disc (21), driving pawl (22) and reset elastic element (23), driving disc (21) is coaxial rotation with driving gear (1), and driving disc (21) is used for connecting with equipment operation shaft, driving pawl (22) is equipped with the positive driving end (222) and reverse driving end (223) towards opposite, driving pawl (22) is rotatably connected on driving disc (21), reset elastic element (23) is used for driving positive driving end (222) or reverse driving end (223) rotation towards the direction close to driving gear (1), driving gear (1) is equipped with the positive ratchet groove (11) of positive driving end (222) and the reverse ratchet groove (12) of reverse driving end (223) for the extension of the reverse ratchet groove (12) of reverse driving end (223) for the extension of the positive ratchet groove (11) of positive driving end (222), Clutch pin (3) is arranged on the rotation path of driving pawl (22), is used for resisting driving pawl (22) and making the direction of positive driving end (222) and reverse driving end (223) change. The clutch pin (3) is provided with two. Driving gear (1) is equipped with the rotation hole (13) of driving disc (21) rotation setting.

2. A clutch protection device according to claim 1, characterised in that: Positive ratchet groove (11) and reverse ratchet groove (12) all are towards driving disc (21), positive ratchet groove (11) is shallow to deep along one of the rotation direction of driving gear (1), and reverse ratchet groove (12) is shallow to deep along the other rotation direction of gear.

3. A clutch protection device according to claim 1, characterized in that: Driving disc (21) includes disc body (211) and rotation part (212) connected on disc body (211), driving pawl (22) is rotatably connected on rotation part (212), and the clearance groove (215) for the rotation setting of positive driving end (222) and reverse driving end (223) is formed between disc body (211) and rotation part (212).

4. A clutch protection device according to claim 1, characterized in that: Driving pawl (22) is equipped with the connecting hole (226) for the insertion of rotation part (212).

5. A clutch protection device according to claim 1, characterized in that: The pin shaft (213) is arranged on the rotation part (212), the rod portion of pin shaft (213) penetrates driving pawl (22) and rotation part (212), the snap spring (214) is connected on pin shaft (213), and the clamping groove (2131) for the extension of E-shaped clasp end is arranged on pin shaft (213).

6. A clutch protection device according to claim 5, wherein: Reset elastic element (23) includes the elastic protrusion (231), driving pawl (22) includes switching end (224) for resisting clutch pin (3) and limiting end (225) for resisting protrusion (231), and one side of protrusion (231) is in abutment with limiting end (225).

7. A clutch protection device according to claim 5, wherein: Reset elastic element (23) is equipped with the mounting hole (233) for the insertion of rotation part (212) and disc body (211) end.

8. A clutch protection device according to claim 5, wherein: ​ 9. A clutch protection device according to claim 8, wherein: ​ 10. A clutch protection device according to claim 8, wherein: The reset elastic member (23) further comprises limiting portions (232) connected on both sides of the protrusions (231), and the disc body (211) is provided with two limiting grooves (2111), and the two limiting portions (232) respectively abut against the side walls of the adjacent limiting grooves (2111).

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