Driving equipment
By introducing an overload protection device into the gear reduction mechanism of the driving device, the beveled toothed structure is used to disengage the meshing state when overloaded, the problem of motor damage caused by excessive load is solved, and the motor protection is achieved.
Patent Information
- Application Number
- CN202223438729.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-21
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2032-12-21
AI Technical Summary
In the case of excessive load, external objects may reversely drive the motor and cause damage to the driving equipment, and the prior art is difficult to effectively prevent such damage.
A driving device including a motor and a gear reduction mechanism is designed. An overload protection device is introduced into the gear reduction mechanism. The overload protection device consists of a first clutch, a second clutch and an elastic member. The meshing surface of the clamping teeth is an inclined surface. It can be disengaged from the engagement state during overload to avoid motor jamming or load reverse driving.
It effectively avoids the motor stalling and being reverse-driven by the load, and reduces the risk of damage to the gear reduction mechanism and the motor.
Smart Images
Figure CN222351392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of driving, and more specifically to a driving device. Background Art
[0002] Common driving devices include motors and gearboxes. The gearbox is used to reduce the speed of the motor output and then drive an external object. When the load is too large or in some special cases, the external object will reversely drive the motor and cause the motor to reverse, thus damaging the driving device. Therefore, an improvement solution is urgently needed. Utility Model Content
[0003] One object of the present invention is to reduce the risk of damage to the drive device.
[0004] To this end, the utility model provides a driving device, including a motor and a gear reduction mechanism, wherein the gear reduction mechanism is used to reduce the output of the motor and then output it to the outside, and the gear reduction mechanism includes an overload protection device, and the overload protection device includes a first clutch, a second clutch and an elastic member; the first clutch has a plurality of first teeth, and the second clutch has a plurality of second teeth, and the elastic member applies elastic force to the first clutch and / or the second clutch, so that the first teeth and the second teeth can be reset to a meshing state to transmit power; the meshing surfaces of the first teeth and the second teeth are inclined surfaces, so that the first teeth and the second teeth can be disengaged from the meshing state when overloaded.
[0005] In one embodiment of the utility model, the gear reduction mechanism includes an output shaft; the first clutch member includes a first ring body, which is sleeved on the output shaft and can rotate around the output shaft but cannot slide along the output shaft; the second clutch member includes a second ring body, which is sleeved on the output shaft, rotates synchronously with the output shaft and can slide along the output shaft.
[0006] In one embodiment of the utility model, the plurality of first latch teeth are located at one end of the first ring body and arranged along the circumferential direction of the first ring body, the plurality of second latch teeth are located at one end of the second ring body and arranged along the circumferential direction of the second ring body, and the second latch teeth are opposite to the first latch teeth.
[0007] In one embodiment of the utility model, the output shaft is provided with a through hole penetrating the outer diameter direction thereof, the second ring body is mounted to the through hole via a connector, and the sliding distance of the second ring body along the output shaft is constrained by the through hole.
[0008] In an embodiment of the present invention, the elastic member is a disc spring sleeved on the output shaft, and the elastic member applies pressure to the second clutch member to make the second clutch member approach the first clutch member.
[0009] In one embodiment of the utility model, the output shaft is provided with a flat position, through which the second ring body can rotate synchronously with the output shaft and can slide along the output shaft.
[0010] In an embodiment of the present invention, the meshing surfaces on both sides of the first latching tooth have the same inclination angle or different inclination angles.
[0011] In one embodiment of the utility model, the gear reduction mechanism includes an output shaft and a driven wheel sleeved on the output shaft, and the driven wheel can rotate relative to the output shaft; the first clutch is fixed to the driven wheel; the second clutch includes a second ring body, which is sleeved on the output shaft, rotates synchronously with the output shaft and can slide along the output shaft.
[0012] In one embodiment of the utility model, the motor includes a rotating shaft for outputting to the outside and a worm fixedly sleeved on the rotating shaft; the driven wheel is directly or indirectly driven by the worm.
[0013] In one embodiment of the utility model, the gear reduction mechanism also includes a first double gear, the large gear of the first double gear is meshed with the worm, the small gear of the first double gear directly or indirectly drives the driven wheel, and the large gear of the first double gear is a helical gear.
[0014] The implementation of the utility model can prevent the motor from being blocked or reversely driven by the load, thereby reducing the risk of damage to the gear reduction mechanism and the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of a driving device provided by an embodiment of the utility model;
[0016] Figure 2 yes Figure 1 A schematic diagram of the driving device shown with the housing of the gear reduction mechanism removed;
[0017] Figure 3 yes Figure 1 Schematic diagram of the output shaft of the driving device shown, its worm gear, and overload protection device;
[0018] Figure 4 yes Figure 3 Exploded schematic diagram of the components shown. DETAILED DESCRIPTION
[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0020] refer to Figure 1 A driving device 100 provided in one embodiment of the utility model includes a motor 20 and a gear reduction mechanism 40 . The gear reduction mechanism 40 is fixedly mounted to one end of the motor 20 and is used to reduce the output of the motor 20 and output it to the outside through an output shaft 42 .
[0021] refer to Figures 2 to 4 , the output shaft 42 is mounted to the gear reduction mechanism 40 through bearings 41 and 43. The gear reduction mechanism 40 includes an overload protection device 50 mounted to the output shaft 42, and the overload protection device 50 includes a first clutch member 51, a second clutch member 55 and an elastic member 59. The first clutch member 51 has a plurality of first latch teeth 52, and the second clutch member 55 has a plurality of second latch teeth 56. The elastic member 59 applies elastic force to the second clutch member 55, so that the first latch teeth 52 and the second latch teeth 56 can be reset to a meshing state to transmit power; the meshing surfaces of the first latch teeth 52 and the second latch teeth 56, such as the meshing surfaces 53 and 54, are inclined surfaces, so that the first latch teeth 52 and the second latch teeth 56 are disengaged from the meshing state when overloaded.
[0022] The first clutch 51 includes a first ring body sleeved on the output shaft 42, and a first latching tooth 52 is provided at one end of the first ring body, and the first latching teeth 52 are arranged in the circumferential direction of the first ring body. The first clutch 51 can rotate around the output shaft 42 but cannot slide along the output shaft 42. The second clutch 55 includes a second ring body sleeved on the output shaft 42, and a second latching tooth 56 is provided at one end of the second ring body close to the first clutch 51, and the second latching teeth 56 are arranged in the circumferential direction of the second ring body. The second clutch 55 rotates synchronously with the output shaft 42 and can slide along the output shaft 42. The elastic member 59 is a disc spring sleeved on the output shaft 42, and the disc spring is compressed between the bearing 43 and the second clutch 55, and applies pressure to the second clutch 55 so that the second clutch 55 is close to the first clutch 51. However, the first clutch 51 is constrained by the bearing 41 and cannot move away from the second clutch 55.
[0023] When the load is too large, the axial force component of the meshing surface of the first latch 52 and the second latch 56 can make the second clutch 55 overcome the elastic force of the elastic member 59 and disengage from the meshing state, thereby avoiding the motor from stalling and protecting the motor. Alternatively, when the load is too large and the motor 20 may need to be driven in reverse, the axial force component of the meshing surface of the first latch 52 and the second latch 56 can make the second clutch 55 overcome the elastic force of the elastic member 59 and disengage from the meshing state, thereby avoiding the load from driving the motor in reverse and reducing the risk of damage to the gear reduction mechanism 40 and the motor 20.
[0024] In this embodiment, the second clutch member 55 is slidable relative to the output shaft 42, so the elastic member 59 applies elastic force to the second clutch member 55. It can be understood that if the first clutch member 51 is slidable relative to the output shaft 42, the elastic member 59 can apply elastic force to the first clutch member 51 instead.
[0025] In this embodiment, the output shaft 42 is provided with a through hole 45 penetrating the outer diameter thereof, and the second ring body is mounted to the through hole 45 via a connector, and the sliding distance of the second ring body along the output shaft 42 is restricted by the through hole 45. As an alternative, the output shaft 42 may be provided with a flat position, and the flat position is used to realize that the second ring body rotates synchronously with the output shaft 42 and can slide along the output shaft 42.
[0026] In this embodiment, the meshing surfaces 53 and 54 on both sides of the first latching tooth 52 have the same tilt angle, so that the overload protection effect is basically the same during forward rotation and reverse rotation. Alternatively, the meshing surfaces 53 and 54 on both sides of the first latching tooth 52 can have different tilt angles, so that different overload protection effects are achieved during forward rotation and reverse rotation.
[0027] In this embodiment, the gear reduction mechanism 40 includes a driven wheel 48 sleeved on the output shaft 42, and the driven wheel 48 can rotate relative to the output shaft 42; the first clutch 51 is fixed to the driven wheel 48. The motor 20 includes a rotating shaft 22 for outputting to the outside and a worm 24 fixedly sleeved on the rotating shaft 22; the gear reduction mechanism 40 also includes a first double gear 44 and a second double gear 46, each of which includes a large gear and a small gear fixed coaxially. Among them, the large gear 44a of the first double gear 44 is meshed with the worm 24, and the large gear 44a is a helical gear; the small gear 44b of the first double gear 44 rotates coaxially with the large gear 44a to achieve the first stage of reduction; the large gear 46a of the second double gear 46 is meshed with the small gear 44b of the first double gear 44, and the small gear 46b of the second double gear 46 rotates coaxially with the large gear 46a to achieve the second stage of reduction. The small gear 46b of the second double gear 46 directly or indirectly drives the driven wheel 48.
[0028] Alternatively, the driven wheel 48 may also be directly driven by the worm 24. Alternatively, more double gears or fewer double gears may be used, for example, only the first double gear 44 may be used without the second double gear 46, in which case the pinion of the first double gear 44 drives the driven wheel 48 directly.
[0029] In this embodiment, the overload protection device 50 is arranged at the last stage of the gear reduction mechanism 40, but the present invention is not limited to this case. For example, the overload protection device 50 can be arranged at the first double gear 44 or the second double gear 46. If it is arranged at the first double gear 44, the volume of the overload protection device 50 can be made smaller, so that the volume of the gear reduction mechanism 40 and the entire drive device is more compact.
[0030] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several modifications and improvements can be made, such as combining different features in various embodiments, etc., which all belong to the protection scope of the utility model.
Claims
1. A driving device, comprising a motor (20) and a gear reduction mechanism (40), wherein the gear reduction mechanism (40) is used to reduce the speed of the output of the motor (20) and then output it externally; characterized in that: The gear reduction mechanism (40) comprises an overload protection device (50), wherein the overload protection device (50) comprises a first clutch member (51), a second clutch member (55) and an elastic member (59); the first clutch member (51) has a plurality of first latching teeth (52), the second clutch member (55) has a plurality of second latching teeth (56), and the elastic member (59) applies elastic force to the first clutch member (51) and / or the second clutch member (55), so that the first latching teeth (52) and the second latching teeth (56) can be reset to a meshing state to transmit power; the meshing surfaces of the first latching teeth (52) and the second latching teeth (56) are inclined surfaces, so that the first latching teeth (52) and the second latching teeth (56) can be disengaged from the meshing state when overloaded.
2. The driving device according to claim 1, characterized in that The gear reduction mechanism (40) comprises an output shaft (42); the first clutch member (51) comprises a first ring body, the first ring body is sleeved on the output shaft (42), can rotate around the output shaft (42) but cannot slide along the output shaft (42); the second clutch member (55) comprises a second ring body, the second ring body is sleeved on the output shaft (42), rotates synchronously with the output shaft (42) and can slide along the output shaft (42).
3. The driving device according to claim 2, characterized in that The plurality of first latch teeth (52) are located at one end of the first ring body and are arranged along the circumferential direction of the first ring body, the plurality of second latch teeth (56) are located at one end of the second ring body and are arranged along the circumferential direction of the second ring body, and the second latch teeth (56) are opposite to the first latch teeth (52).
4. The driving device according to claim 3, characterized in that The output shaft (42) is provided with a through hole (45) penetrating in the direction of the outer diameter thereof; the second ring body is mounted on the through hole (45) via a connecting piece; and the sliding distance of the second ring body along the output shaft (42) is constrained by the through hole (45).
5. The driving device according to claim 3, characterized in that The elastic member (59) is a disc spring sleeved on the output shaft (42), and the elastic member (59) applies pressure to the second clutch member (55) so that the second clutch member (55) is close to the first clutch member (51).
6. The driving device according to claim 3, characterized in that The output shaft (42) is provided with a flat position, through which the second ring body can rotate synchronously with the output shaft (42) and can slide along the output shaft (42).
7. The driving device according to claim 1, characterized in that The meshing surfaces (53, 54) on both sides of the first latching tooth (52) have the same inclination angle, or have different inclination angles.
8. The driving device according to claim 1, characterized in that The gear reduction mechanism (40) comprises an output shaft (42) and a driven wheel (48) sleeved on the output shaft (42), wherein the driven wheel (48) is rotatable relative to the output shaft (42); the first clutch member (51) is fixed to the driven wheel (48); and the second clutch member (55) comprises a second ring body, wherein the second ring body is sleeved on the output shaft (42), rotates synchronously with the output shaft (42) and is slidable along the output shaft (42).
9. The driving device according to claim 8, characterized in that The motor (20) comprises a rotating shaft (22) for outputting to the outside and a worm (24) fixedly sleeved on the rotating shaft (22); the driven wheel (48) is directly or indirectly driven by the worm (24).
10. The driving device according to claim 9, characterized in that The gear reduction mechanism (40) further comprises a first double gear (44), the large gear of the first double gear (44) being meshed with the worm (24), the small gear of the first double gear (44) directly or indirectly driving the driven wheel (48), and the large gear of the first double gear (44) being a helical gear.