Large-torsion belt self-locking actuator

Abstract

The utility model discloses a large torsion belt self-locking actuator, which relates to the field of automobile actuators and comprises a shell, an upper cover, a transmission assembly, a self-locking mechanism and a circuit board, the shell is matched with the upper cover, the transmission assembly, the self-locking mechanism and the circuit board are all mounted in the shell, and the transmission assembly and the self-locking mechanism are both connected with the circuit board. According to the actuator, speed reduction is carried out through the transmission gear set, finally rotating force is output through the output gear, and the execution torsion is large. Moreover, a self-locking mechanism is arranged in the actuator, self-locking is carried out on the transmission gear set, stepless self-locking can be achieved, the purpose of self-locking at any designated position is achieved, a single actuator can be used in multiple use scenes, and performance and universality are higher.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile actuators, in particular to a large torque belt self-locking actuator. Background Art

[0002] The existing opener actuator for a car fuel tank cap or a trolley charging cap is usually an actuator that outputs rotation, which pushes out the fuel tank cap by rotation, or outputs torque to open the charging cap to a specific angle.

[0003] The actuators currently on the market have low execution torque and no self-locking capability. Without the assistance of other auxiliary locking actuators, users can easily open or close the already opened or closed fuel tank cap / charging cap.

[0004] like Figure 1 and Figure 2 , which is the current common design scheme, among which, Figure 1 This is a common fuel tank cap lock actuator. Its output provides a push-out force, but it has no self-locking function and has low output torque. Figure 2 This is an existing electric vehicle charging cover actuator with a volume of Figure 1 It is more than twice as big as the original.

[0005] In view of this, the present invention is deeply conceived to address the many deficiencies and inconveniences caused by the imperfect structural design of existing actuators, and actively researches, improves and tests to develop and design the present invention. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an actuator that outputs large torque and has a self-locking capability at any angle, thereby improving performance and versatility.

[0007] In order to achieve the above objectives, the solution of the present invention is:

[0008] A high-torque belt self-locking actuator comprises a housing, an upper cover, a transmission assembly, a self-locking mechanism, and a circuit board. The housing and the upper cover cooperate with each other, the transmission assembly, the self-locking mechanism, and the circuit board are all installed in the housing, and the transmission assembly and the self-locking mechanism are both connected to the circuit board.

[0009] The transmission assembly includes a gear motor, a transmission gear set for deceleration, and an output gear. The transmission gear set is installed between the housing and the upper cover. One end of the output gear is movably connected to the upper cover and the other end is movably connected to the housing. The gear motor, the transmission gear set, and the output gear are rotatably connected in sequence.

[0010] The self-locking mechanism includes a motor, a screw, a locking seat and a self-locking block. The motor is fixed to the housing, the screw is installed on the output shaft of the motor, the locking seat is sleeved on the screw and can move back and forth relative to the screw, and the self-locking block is arranged on the locking seat. The self-locking block is in active contact with the transmission gear set and limits it.

[0011] Furthermore, the transmission gear set includes a first double gear, a second double gear and a third double gear. The first double gear, the second double gear and the third double gear are all installed between the shell and the upper cover through gear shafts. The gear motor, the third double gear, the second double gear, the first double gear and the output gear are rotationally connected in sequence.

[0012] Furthermore, a self-locking member is coaxially fixed on the second double gear, and the self-locking member and the self-locking block are in movable contact and limit each other.

[0013] Furthermore, the surfaces of the self-locking member and the self-locking block are both provided with teeth that mesh with each other.

[0014] Furthermore, the surfaces of the self-locking member and the self-locking block are respectively provided with a friction ring and a friction block that cooperate with each other.

[0015] Furthermore, the locking seat is provided with a hook; it also includes an emergency pull rope, which includes a pull rope body and a pull ring, the pull ring is arranged at the end of the pull rope body, the end of the pull rope body close to the pull ring extends into the shell and the pull ring is hooked with the hook, and the end of the pull rope body away from the pull ring is placed outside the shell.

[0016] Furthermore, it also includes a fixed cover, which is arranged on the motor and fixed to the shell; a limit plate extends from the surface of the fixed cover to form a guide groove, and the pull rope body is movably fitted in the guide groove.

[0017] Furthermore, the geared motor includes a motor stator and a motor rotor, the motor stator is fixed to the housing, and a motor gear is provided at one end of the motor rotor away from the motor stator. The motor gear passes through the circuit board and engages with the transmission gear set.

[0018] Furthermore, the large gear and the small gear of the third dual gear are both helical gears.

[0019] Furthermore, an assembly groove corresponding to the second duplex gear is provided at the axis center of the self-locking member, and the pinion of the second duplex gear is inserted into the assembly groove.

[0020] With this structure, the actuator of this utility model reduces speed through the transmission gear set, ultimately delivering rotational force through the output gear, resulting in high torque. Furthermore, a self-locking mechanism is incorporated within the actuator, which locks the transmission gear set, achieving infinite self-locking and achieving self-locking at any specified position. This allows a single actuator to be used in multiple scenarios, enhancing performance and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of prior art 1.

[0022] Figure 2 This is a schematic diagram of prior art 2.

[0023] Figure 3 This is a structural exploded view of a preferred embodiment of the present invention.

[0024] Figure 4 It is a three-dimensional diagram of a preferred embodiment of the present utility model.

[0025] Figure 5 It is a rear view of a preferred embodiment of the utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the preferred embodiment of the present invention in the unlocked state except for the second double gear, the third double gear and the upper cover.

[0027] Figure 7 This is a schematic diagram of the structure of the preferred embodiment of the present invention in the self-locking state except for the second duplex gear, the third duplex gear and the upper cover.

[0028] Figure 8 This is a schematic diagram of the structure of the preferred embodiment of the present invention except for the housing in the self-locking state.

[0029] Figure 9 for Figure 8 A partial enlarged view of part A in the middle.

[0030] Figure 10 This is a schematic diagram of the partial structure excluding the housing in the self-locking state of another embodiment of the utility model.

[0031] Figure 11 for Figure 10 A partial enlarged view of part B in the middle.

[0032] Explanation of the accompanying drawings: 11. Housing; 12. Upper cover; 21. Geared motor; 211. Motor stator; 212. Motor rotor; 213. Motor gear; 22. First duplex gear; 23. Second duplex gear; 24. Third duplex gear; 25. Output gear; 26. Self-locking part; 261. Assembly groove; 3. Self-locking mechanism; 31. Motor; 32. Screw; 33. Locking seat; 34. Self-locking block; 35. Hook; 4. Circuit board; 5. Fixed cover; 51. Limiting plate; 52. Guide groove; 6. Emergency pull rope; 61. Pull rope body; 62. Pull ring; 63. Pull rope sealing ring; 7. External sealing ring; 8. Gear shaft. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below.

[0034] In the description of the present invention, it should be understood that terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0035] like Figures 3 to 9 The figure shows a preferred embodiment of a high-torque belt self-locking actuator of the present invention, comprising a housing 11, an upper cover 12, a transmission assembly, a self-locking mechanism 3, and a circuit board 4. The housing 11 and the upper cover 12 cooperate with each other, and the transmission assembly, the self-locking mechanism 3, and the circuit board 4 are all installed within the housing 11. The transmission assembly and the self-locking mechanism 3 are both connected to the circuit board 4. Specifically, the housing 11 and the upper cover 12 can be installed together by snap fastening, screw locking, hinge connection, etc., which are not limited here. A receiving cavity is formed between the housing 11 and the upper cover 12, and all parts other than the housing 11 and the upper cover 12 can be installed in the receiving cavity.

[0036] The transmission assembly includes a geared motor 21, a transmission gear set for speed reduction, and an output gear 25. The transmission gear set is mounted between the housing 11 and the upper cover 12. One end of the output gear 25 is movably connected to the upper cover 12, and the other end is movably connected to the housing 11. The geared motor 21, the transmission gear set, and the output gear 25 are sequentially rotationally connected. The geared motor 21 is electrically connected to the circuit board 4. The end of the output gear 25 is exposed outside the housing 11, and an external sealing ring 7 is provided at the connection between the output gear 25 and the housing 11. The exposed end of the output gear 25 is a special-shaped structure that can be connected to the output shaft.

[0037] The self-locking mechanism 3 includes a motor 31, a screw 32, a locking seat 33 and a self-locking block 34. The motor 31 is fixed to the housing 11, the screw 32 is installed on the output shaft of the motor 31, the locking seat 33 is sleeved on the screw 32 and can move back and forth relative to the screw 32, and the self-locking block 34 is set on the locking seat 33. The self-locking block 34 is in active contact with the transmission gear set and limits it. The motor 31 is electrically connected to the circuit board 4.

[0038] In this embodiment, the self-locking block 34 is detachably mounted on the locking seat 33 . In other embodiments, the self-locking block 34 and the locking seat 33 may also be made on the same part.

[0039] Specifically, the inner wall of the locking seat 33 may be provided with an internal thread corresponding to the screw 32, or an inclined slider corresponding to the screw 32, so that the locking seat 33 can move back and forth as the screw 32 rotates, which is not limited here.

[0040] During operation, the actuator outputs torque through the gear motor 21, the transmission gear set, and the output gear 25, and the transmission gear set is used to reduce speed and thereby increase the output torque.

[0041] In the self-locking state, the circuit board 4 logic provides a locking command to the motor 31. The motor 31 rotates the screw 32, driving the locking seat 33 forward. This in turn pushes the self-locking block 34 into contact with the transmission gear set, allowing the actuator to rotate freely without external interference, thus achieving self-locking. The self-locking mechanism 3 self-locks the transmission gear set, providing a self-locking force to the transmission gear set, thereby achieving self-locking capability for the output gear 25. This allows the output gear 25 to self-lock at any angle.

[0042] In the non-self-locking state, the motor 31 drives the screw 32 to rotate, thereby driving the locking seat 33 to move backward, and then retracting the self-locking block 34. At this time, the self-locking block 34 is separated from the transmission gear set, so that the actuator can rotate freely under the intervention of external forces, and can also be externally powered through the gear motor 21 to output rotation.

[0043] The key point of this utility model is that the actuator of this utility model reduces speed through the transmission gear set, and finally outputs the rotational force through the output gear 25, resulting in high actuator torque. In addition, the actuator is equipped with a self-locking mechanism 3, which can achieve stepless self-locking and achieve the purpose of self-locking at any specified position. This allows a single actuator to be used in multiple scenarios, and has higher performance and versatility.

[0044] In this embodiment, the transmission gear set includes a first duplex gear 22, a second duplex gear 23, and a third duplex gear 24. The first duplex gear 22, the second duplex gear 23, and the third duplex gear 24 are all mounted between the housing 11 and the upper cover 12 via a gear shaft 8. The gear motor 21, the third duplex gear 24, the second duplex gear 23, the first duplex gear 22, and the output gear 25 are sequentially connected in rotation. Specifically, the gear motor 21 meshes with the large gear of the third duplex gear 24, the small gear of the third duplex gear 24 meshes with the large gear of the second duplex gear 23, the small gear of the second duplex gear 23 meshes with the large gear of the first duplex gear 22, and the small gear of the first duplex gear 22 meshes with the output gear 25.

[0045] This embodiment preferably adopts a four-stage transmission, in which the output gear 25, the first duplex gear 22, the second duplex gear 23, and the third duplex gear 24 are staggered to ensure that the output gear 25 is at the edge and the output torque is greater than 1 Nm, while avoiding the increase in material costs caused by more than four stages of transmission.

[0046] In this embodiment, a self-locking member 26 is coaxially fixed to the second duplex gear 23. This self-locking member 26 flexibly engages and mutually limits the self-locking block 34. By attaching the self-locking member 26 to the second duplex gear 23, the self-locking mechanism 3 only needs to provide a relatively small self-locking force on the second duplex gear 23 to achieve a relatively large self-locking capability for the output gear 25.

[0047] The large gear of the first duplex gear 22 is disposed between the large gear of the second duplex gear 23 and the self-locking element 26. In this embodiment, the self-locking element 26 and the self-locking block 34 are both provided with intermeshing teeth. The teeth of the self-locking block 34 engage the teeth of the self-locking element 26, thereby preventing the second duplex gear 23 from rotating.

[0048] like Figure 10 and Figure 11 As shown, in other embodiments, the self-locking member 26 and the self-locking block 34 may also be in the form of a friction ring and a friction block, and the friction force generated by the mutual abutment between the self-locking member 26 and the self-locking block 34 limits each other to achieve the self-locking function.

[0049] In this embodiment, a mounting groove 261 corresponding to the second duplex gear 23 is defined at the axis of the self-locking member 26. The pinion of the second duplex gear 23 is inserted into the mounting groove 261. The inner wall of the mounting groove 261 matches the shape of the pinion of the second duplex gear 23. The self-locking member 26 and the second duplex gear 23 rotate coaxially in conjunction. In other embodiments, the second duplex gear 23 and the self-locking member 26 may be formed on the same component.

[0050] In this embodiment, a hook 35 is provided on the locking seat 33; the actuator also includes an emergency pull rope 6, which includes a pull rope body 61 and a pull ring 62, the pull ring 62 is arranged at the end of the pull rope body 61, and the end of the pull rope body 61 close to the pull ring 62 extends into the shell 11 and the pull ring 62 is connected to the hook 35, and the end of the pull rope body 61 away from the pull ring 62 is placed outside the shell 11.

[0051] In the emergency unlocking state, pulling the emergency pull rope 6 drives the locking seat 33 to move backward, thereby retracting the self-locking block 34, so that the self-locking block 34 is separated from the transmission gear set, thereby achieving the purpose of emergency unlocking.

[0052] In this embodiment, the emergency pull rope 6 further includes a pull rope sealing ring 63 , which is sleeved on the pull rope body 61 and installed at the connection between the housing 11 and the pull rope body 61 , and plays a role in dustproof and waterproof.

[0053] In this embodiment, the actuator also includes a fixed cover 5, which is covered on the motor 31 and fixed to the housing 11; a limiting plate 51 extends from the surface of the fixed cover 5 and forms a guide groove 52, and the pull rope body 61 is movably fitted in the guide groove 52, which is convenient for installation and has a more stable structure.

[0054] In this embodiment, the geared motor 21 includes a motor stator 211 and a motor rotor 212. The motor stator 211 is fixed to the housing 11, and the motor rotor 212 is rotatably mounted within the motor stator 211. A motor gear 213 is provided at the end of the motor rotor 212 away from the motor stator 211. The motor gear 213 passes through the circuit board 4 and meshes with the large gear of the third double gear 24. The motor stator 211 is electrically connected to the circuit board 4.

[0055] The motor gear 213 passes through the through hole reserved in the middle of the circuit board 4 and meshes with the large gear of the third duplex gear 24. The small gear of the third duplex gear 24 passes through the notch reserved at the edge of the circuit board 4 and meshes with the second duplex gear 23. The second duplex gear 23, the first duplex gear 22, and the output gear 25 are staggered and partially overlapped, effectively utilizing the vertical space. Through reasonable gear arrangement and device distribution, the actuator is made flat, compact and miniaturized, and the cost is optimized.

[0056] To further achieve a compact transmission, the large gear and small gear of the third double gear 24 in this embodiment are both helical gears. Correspondingly, the large gear of the motor gear 213 and the second double gear 23 are also helical gears. This design can minimize the driving wheel, increase the transmission ratio, and increase the output torque.

[0057] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A high torque belt self-locking actuator, characterized by: The device comprises a housing, an upper cover, a transmission assembly, a self-locking mechanism and a circuit board. The housing and the upper cover cooperate with each other, the transmission assembly, the self-locking mechanism and the circuit board are all installed in the housing, and the transmission assembly and the self-locking mechanism are both connected to the circuit board. The transmission assembly includes a gear motor, a transmission gear set for deceleration, and an output gear. The transmission gear set is installed between the housing and the upper cover. One end of the output gear is movably connected to the upper cover and the other end is movably connected to the housing. The gear motor, the transmission gear set, and the output gear are rotatably connected in sequence. The self-locking mechanism includes a motor, a screw, a locking seat and a self-locking block. The motor is fixed to the housing, the screw is installed on the output shaft of the motor, the locking seat is sleeved on the screw and can move back and forth relative to the screw, and the self-locking block is arranged on the locking seat. The self-locking block is in active contact with the transmission gear set and limits it.

2. A high torque belt self-locking actuator according to claim 1, characterized in that: The transmission gear set includes a first double gear, a second double gear and a third double gear. The first double gear, the second double gear and the third double gear are all installed between the shell and the upper cover through a gear shaft. The gear motor, the third double gear, the second double gear, the first double gear and the output gear are rotated and connected in sequence.

3. The high torque belt self-locking actuator according to claim 2, characterized in that: A self-locking piece is coaxially fixed on the second double gear, and the self-locking piece is in movably contact with the self-locking block and limits each other.

4. The high torque belt self-locking actuator according to claim 3, characterized in that: The surfaces of the self-locking piece and the self-locking block are both provided with teeth that mesh with each other.

5. The high torque belt self-locking actuator according to claim 3, characterized in that: The surfaces of the self-locking piece and the self-locking block are respectively provided with a friction ring and a friction block which cooperate with each other.

6. The high torque belt self-locking actuator according to claim 1, characterized in that: The locking seat is provided with a hook; it also includes an emergency pull rope, which includes a pull rope body and a pull ring. The pull ring is arranged at the end of the pull rope body, and the end of the pull rope body close to the pull ring extends into the shell and the pull ring is hooked with the hook, and the end of the pull rope body away from the pull ring is placed outside the shell.

7. The high torque belt self-locking actuator according to claim 6, characterized in that: It also includes a fixed cover, which is arranged on the motor and fixed to the housing; a limit plate extends from the surface of the fixed cover to form a guide groove, and the pull rope body is movably fitted in the guide groove.

8. The high torque belt self-locking actuator according to claim 1, characterized in that: The geared motor includes a motor stator and a motor rotor. The motor stator is fixed to the housing. An end of the motor rotor away from the motor stator is provided with a motor gear. The motor gear passes through the circuit board and meshes with the transmission gear set.

9. The high torque belt self-locking actuator according to claim 2, characterized in that: The large gear and the small gear of the third duplex gear are both helical gears.

10. The high torque belt self-locking actuator according to claim 3, characterized in that: An assembly groove corresponding to the second duplex gear is provided at the axis center of the self-locking member, and the pinion of the second duplex gear is inserted into the assembly groove.

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