A push rod actuator with increased rack holding force
By setting an electromagnetic clutch and shrapnel in the push rod actuator, increasing the motor no-load rotation torque, and amplifying the torque with the reduction gear box, the problem that the existing technology cannot effectively increase the rack retaining force, and effective rack retaining force improvement is achieved.
Patent Information
- Application Number
- CN202411745167.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-04-04
AI Technical Summary
Existing push rod actuators cannot effectively increase the retention force of the rack and cannot adjust the output torque.
By setting up an electromagnetic clutch and shrapnel, limiting and increasing the motor no-load rotation torque, the reduction gear box is used to amplify the torque, thereby increasing the retention force of the gear and indirectly increasing the retention force of the rack.
The retaining force of the gear is effectively increased, and the retaining force of the rack is indirectly improved, solving the problem that the prior art cannot adjust the output torque.
Smart Images
Figure CN119754665A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of push rod actuators, and in particular to a push rod actuator for increasing the holding force of a rack. Background Art
[0002] At present, high-end home appliances are developing towards intelligence, centralization, cabinetization and integration. After applying various automatic door opening and closing actuators, door handles are gradually eliminated to make home appliances more beautiful. When push rod actuators are applied to the home appliance industry, the rack needs to be kept for a period of time after being pushed out. There is a requirement for holding force at this stage. In many cases, this holding force will be directly applied to the rack in some way. Most of the existing push rod actuators are output through the cooperation of motors and reduction gearboxes, but the output torque cannot be adjusted, making it impossible to directly or indirectly increase the holding force of the rack. Summary of the invention
[0003] The purpose of the present invention is to provide a push rod actuator that increases the holding force of the rack to solve the above-mentioned problem. By setting an electromagnetic clutch and cooperating with a spring sheet connected to a motor, the no-load rotation torque of the motor can be limited and increased, which can effectively increase the holding force of the gear and indirectly increase the holding force of the rack.
[0004] Technical solution: The present invention provides a push rod actuator for increasing the holding force of a rack, comprising: a housing, a driving part, a torque increasing mechanism, and a rack. The housing is divided into a driving area and a travel area, and the driving area is arranged vertically to the travel area; the driving part is arranged in the driving area; the torque increasing mechanism comprises: an electromagnetic clutch device, a spring, and a connecting rod. The electromagnetic clutch device is arranged in the driving area, close to the end of the driving part, and the spring is directly opposite to the electromagnetic clutch device and connected to the driving part through the connecting rod; the rack is arranged in the travel area and is connected with the driving part. When the rack is extended into place, the electromagnetic clutch device attracts the spring to increase the torque of the driving part when it is unloaded, thereby increasing the holding force of the rack.
[0005] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, an opening is provided on the outer side of the travel area.
[0006] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, the driving part includes: a motor, a reduction gear box, and a drive shaft, the motor is connected to the reduction gear box, the end of the motor is connected to the spring sheet through a connecting rod, and the drive shaft is connected to the output end of the reduction gear box. The spring sheet is attracted by the electromagnetic clutch device to increase the rotational torque of the motor when it is unloaded, and then amplified by the reduction gear box, effectively increasing the gear holding force, thereby indirectly increasing the holding force of the rack.
[0007] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, two sets of gears are provided on the driving shaft, and the gears are meshed with the teeth on the rack.
[0008] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, a buffer zone is provided at the end of the rack, and the buffer zone passes through an opening outside the travel area and enters the outside of the shell.
[0009] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, a buffer sleeve is sleeved on the outer side of the buffer zone, and a locking structure is provided on the buffer zone.
[0010] Furthermore, in the above-mentioned push rod actuator for increasing the holding force of the rack, a notch is provided on the rack, a second notch is provided in the buffer zone, the notch and the second notch are both facing one side of the driving part, and the stroke of the notch and the second notch is set according to the door opening angle of the push rod actuator.
[0011] It can be seen from the above technical scheme that the present invention has the following beneficial effects: the push rod actuator for increasing the holding force of the rack described in the present invention, by setting an electromagnetic clutch, when the rack is extended into place and the motor is powered off, the electromagnetic clutch adsorbs the spring connected to the motor, limits and increases the no-load rotation torque of the motor, and then amplifies it through the reduction gear box, which can effectively increase the holding force of the gear and indirectly increase the holding force of the rack. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of a push rod actuator for increasing the rack holding force of the present invention; Figure 2 It is a schematic diagram of the driving part of the present invention; Figure 3 Schematic diagram of the rack of the present invention.
[0013] In the figure: housing 1, driving part 2, torque increasing mechanism 3, rack 4, driving area 11, travel area 12, opening 13, electromagnetic clutch device 31, spring 32, connecting rod 33, motor 21, reduction gear box 22, driving shaft 23, gear 231, buffer zone 41, notch 42, second notch 43, buffer sleeve 411, locking structure 412. DETAILED DESCRIPTION
[0014] Example 1 like Figure 1-2The push rod actuator for increasing the holding force of the rack shown in the figure comprises: a housing 1, a driving part 2, a torque increasing mechanism 3, and a rack 4. The housing 1 is divided into a driving area 11 and a travel area 12, and the driving area 11 and the travel area 12 are arranged vertically; the driving part 2 is arranged in the driving area 11; the torque increasing mechanism 3 comprises: an electromagnetic clutch device 31, a spring 32, and a connecting rod 33. The electromagnetic clutch device 31 is arranged in the driving area 11, close to the end of the driving part 2, and the spring 32 is directly opposite to the electromagnetic clutch device 31, and is connected to the driving part 2 through the connecting rod 33; the rack 4 is arranged in the travel area 12 and is connected with the driving part 2. When the rack is extended into place, the electromagnetic clutch device 31 attracts the spring 32 to increase the torque of the driving part 2 when it is unloaded, thereby increasing the holding force of the rack 4.
[0015] like Figure 2 The push rod actuator for increasing the holding force of the rack is shown, and the driving part 2 includes: a motor 21, a reduction gear box 22, and a drive shaft 23. The motor 21 is connected to the reduction gear box 22, and the end of the motor 21 is connected to the spring 32 through a connecting rod 33, and the drive shaft 23 is connected to the output end of the reduction gear box 22. The spring 32 is attracted by the electromagnetic clutch device 31, and the rotation torque of the motor 21 is increased when it is unloaded, and then amplified by the reduction gear box 22, which effectively increases the gear holding force, thereby indirectly increasing the holding force of the rack 4.
[0016] Example 2 On the basis of Example 1, in this example, Figure 1 , 3 In the push rod actuator for increasing the holding force of the rack shown, an opening 13 is provided on the outside of the travel area 12; a buffer zone 41 is provided at the end of the rack 4, and the buffer zone 41 passes through the opening 13 on the outside of the travel area 12 and enters the outside of the housing 1.
[0017] like Figure 3 A push rod actuator for increasing the holding force of a rack is shown, wherein a buffer sleeve 411 is sleeved on the outside of the buffer zone 41, and a locking structure 412 is provided on the buffer zone 41; a notch 42 is provided on the rack 4, and a second notch 43 is provided on the buffer zone 41, and both the notch 42 and the second notch 43 are facing the side of the driving part 2, and the stroke of the notch 42 and the second notch 43 is set according to the door opening angle of the push rod actuator.
[0018] In this embodiment, two sets of gears 231 are provided on the driving shaft 23 , and the gears 231 mesh with the teeth on the rack 4 .
[0019] It should be noted that the above is only a technical solution of the invention and not a limitation. Although the present invention is described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the invention can be modified or replaced by equivalents without departing from the scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.
Claims
1. A push rod actuator for increasing the holding force of a rack, characterized in that: include: A housing (1), wherein the housing (1) is divided into a driving area (11) and a travel area (12), and the driving area (11) and the travel area (12) are arranged vertically; A driving unit (2), the driving unit (2) being arranged in the driving area (11), the driving unit (2) comprising: a motor (21), a reduction gear box (22), and a driving shaft (23), the motor (21) being connected to the reduction gear box (22), and the driving shaft (23) being connected to an output end of the reduction gear box (22); A torque increasing mechanism (3), the torque increasing mechanism (3) comprising: an electromagnetic clutch device (31), a spring sheet (32), and a connecting rod (33); the electromagnetic clutch device (31) is arranged in the driving area (11) and close to the end of the motor (21); the spring sheet (32) is directly opposite to the electromagnetic clutch device (31) and is connected to the motor (21) via the connecting rod (33); A rack (4), wherein the rack (4) is arranged in the travel area (12) and is cooperatively connected with the driving part (2).
2. A push rod actuator for increasing rack holding force according to claim 1, characterized in that: An opening (13) is provided outside the travel area (12).
3. A push rod actuator for increasing rack holding force according to claim 1, characterized in that: The driving shaft (23) is provided with two sets of gears (231), and the gears (231) are meshed with teeth on the rack (4).
4. A push rod actuator for increasing rack holding force according to claim 1, characterized in that: A buffer zone (41) is provided at the end of the rack (4), and the buffer zone (41) passes through an opening (13) outside the travel zone (12) and enters the outside of the housing (1).
5. The push rod actuator for increasing rack holding force according to claim 1, characterized in that: The buffer zone (41) is covered with a buffer sleeve (411) on the outside, and the buffer zone (41) is provided with a locking structure (412).
6. The push rod actuator for increasing rack holding force according to claim 1, characterized in that: The rack (4) is provided with a notch (42), and the buffer zone (41) is provided with a second notch (43).
7. A push rod actuator for increasing rack holding force according to claim 7, characterized in that: The notch (42) and the second notch (43) are both oriented toward one side of the driving portion (2), and the strokes of the notch (42) and the second notch (43) are set according to the door opening angle of the push rod actuator assembly.