CN218324473U

CN218324473U - Mute push rod actuator

Info

Publication number: CN218324473U
Application number: CN202121839980.6U
Authority: CN
Inventors: 沈庆; 黄建昌; 芮正国; 周飞
Original assignee: Oechsler Plastic Products Taicang Co Ltd
Current assignee: Oechsler Plastic Products Taicang Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2023-01-17
Anticipated expiration: 2031-08-09

Abstract

The utility model discloses a mute push rod actuator, which comprises a shell, a shell cover, a push rod and a driving device; the shell and the shell cover can be detachably covered, and an accommodating chamber is formed inside the shell and the shell cover; the push rod can be arranged in the accommodating cavity in a sliding manner, and the driving device is arranged in the accommodating cavity and drives the push rod to do linear motion; a push rod hole is formed in the end part, opposite to the push rod, of the shell in a penetrating mode so that the push rod can extend out and retract; the inner wall of the shell is provided with a silencing structure, the silencing structure is formed by arranging a plurality of silencing bulges, and gaps are formed between the adjacent silencing bulges. The utility model discloses the during operation, drive arrangement drive push rod stretches out and withdraws, and the noise that produces when the push rod moves meets constantly reflection behind the amortization arch, and the energy progressively attenuates to the noise reduction.

Description

Mute push rod actuator

Technical Field

The utility model belongs to the technical field of domestic appliance, concretely relates to silence push rod executor.

Background

The integration of various execution components is a necessary means for realizing automation and intelligence of household appliances. In recent years, with the accelerated development of home appliances toward automation and intelligence, noise control of home appliances is becoming more difficult as quality pursuits of consumers are increasing.

The push rod actuator is an actuating component capable of outputting linear driving force, can be installed on an intelligent refrigerator and provides early-stage driving force for automatically opening the door of the refrigerator. The utility model discloses an in the implementation process, my company has carried out investigation test to the push rod executor on the market, and the noise is generally more than 50dB (A), and the sharp-pointed noise of narrow frequency section accounts for than on the high side. To address this problem, my company has tried the following improvements.

1. The high-quality motor is used and matched with the high-precision gear set, the noise generated by the motor can be reduced in the mode, the noise generated by tooth surface collision during gear meshing can also be reduced, the overall amplitude reduction is in the range of 3-5dB (A), but the mode can greatly improve the production cost, the motor purchasing cost, the gear machining cost, the shell machining cost, the assembly cost and the like, and the market competitiveness of the product is influenced.

2. The low-speed large-torque output is realized by increasing the reduction ratio, the noise can be reduced on the whole by the mode, and the amplitude reduction is in the range of 3-4dB (A), but the mode can increase the number of stages of the reduction gear in the actuator, and the stability and the durability of the actuator are adversely affected.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a silence push rod executor. The object is to provide a more silent push rod actuator within an acceptable cost range without affecting the overall performance.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a mute push rod actuator comprises a shell, a shell cover, a push rod and a driving device; the shell and the shell cover can be detachably covered, and an accommodating chamber is formed inside the shell and the shell cover; the push rod can be arranged in the accommodating cavity in a sliding mode, and the driving device is arranged in the accommodating cavity and drives the push rod to do linear motion; a push rod hole is formed in the end part, opposite to the push rod, of the shell in a penetrating mode so that the push rod can extend out and retract; the inner wall of the shell is provided with a silencing structure, the silencing structure is formed by arranging a plurality of silencing bulges, and gaps are formed between the adjacent silencing bulges. The utility model discloses the during operation, drive arrangement drive push rod stretches out and withdraws, and the noise that produces when the push rod moves meets constantly reflection behind the amortization arch, and the energy progressively attenuates to the noise reduction.

Further, the sound deadening projection includes a body portion and a nose portion; the body part is in a cuboid shape, and the convex tip part is in a wedge shape and is integrally connected with one end of the body part.

Furthermore, encircle casing inside wall a week and all be equipped with the amortization arch.

Further, the shell cover inboard is equipped with the cotton piece of porous bubble, further promotes the noise reduction effect.

Furthermore, the porous foam blocks are brick-shaped, every three porous foam blocks form a unit, two porous foam blocks are arranged in parallel in each unit, and the other porous foam block is vertically arranged at the end parts of the first two porous foam blocks; gaps are arranged between the adjacent hole foam cotton blocks.

Furthermore, a rod cap is sleeved at one end of the push rod close to the push rod hole, and the rod cap is made of elastic materials, such as rubber, silica gel and the like, so that noise generated when the push rod is pushed is reduced.

Furthermore, the bottom surface of the shell is provided with a sliding groove for the push rod to be embedded; the upper surface of the push rod is provided with a tooth surface; the driving device comprises a motor and a gear shaft; the motor is fixed with the shell, the gear shaft is connected to an output shaft of the motor, and the surface of the gear shaft is provided with a circumferential driving tooth part meshed with the tooth surface. The motor rotates to drive the gear shaft to rotate, so that the push rod is driven to do linear motion; the motor can be a speed reducing motor integrated with a speed reducing gear set, so that the effects of reducing speed and increasing torque are achieved, and larger thrust is output.

Furthermore, the end part of the gear shaft is provided with a jack, a fixed shaft is arranged in the shell and inserted in the jack, and the gear shaft is tightly pressed on the tooth surface; a motor fixing frame is also arranged in the shell to fix the motor.

Furthermore, the push rod is also provided with two positioning recesses which are marked as a first positioning recess and a second positioning recess; a first microswitch and a second microswitch are also arranged in the shell; when the push rod slides to a first limit position, the first microswitch sinks into the first positioning recess; when the push rod slides to the second limit position, the second microswitch sinks into the second positioning recess. According to the trigger states of the first micro switch and the second micro switch, whether the push rod extends out of place or retracts into place can be judged, and therefore a basis is provided for control of the motor.

Has the beneficial effects that: compared with the prior art, the utility model provides a silence push rod executor, reasonable in design controls the convenience, can realize the automatic business turn over of push rod, can be used to the intelligence refrigerator and provide drive power in earlier stage for the automation of refrigerator door is opened. Furthermore, the utility model discloses under lower cost consumption, showing and having reduced noise at work, realized the mute design of executor, have excellent comprehensive properties.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the housing.

FIG. 3 is a schematic view of the housing cover.

Fig. 4 is a schematic diagram of the internal structure of the present invention.

Fig. 5 is a structural schematic diagram of a gear shaft.

Fig. 6 is a schematic structural view of a motor fixing frame.

Fig. 7 is a schematic structural view of a noise-deadening projection.

In the figure, a housing 1, a housing cover 2, a push rod 3, a driving device 4, a push rod hole 11, a noise reduction protrusion 12, a body portion 121, a convex tip portion 122, a porous foam block 21, a rod cap 5, a sliding groove 13, a tooth surface 31, a motor 41, a gear shaft 42, a driving tooth portion 421, an insertion hole 422, a fixed shaft 14, a motor fixing frame 15, a first side limit block 151, a second side limit block 152, a first end panel 153, a second end panel 154, a limit groove 16, a limit disc 423, a first positioning recess 32, a second positioning recess 33, a first microswitch 6 and a second microswitch 7.

Detailed Description

The invention is further illustrated by the following examples, which are intended to illustrate the technical solutions of the invention more clearly and are not to be construed as a limitation.

Unless defined otherwise, technical or scientific terms used herein should be understood as having the ordinary meaning as understood by those of ordinary skill in the art. The use of "first," "second," and the like in the description of the invention does not denote any order, quantity, or importance, but rather the terms "first," "second," and the like are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 1

A mute push rod actuator is shown in figures 1 to 7 and comprises a shell 1, a shell cover 2, a push rod 3 and a driving device 4; the shell 1 and the shell cover 2 are detachably covered, and an accommodating chamber is formed inside the shell; the push rod 3 can be arranged in the accommodating cavity in a sliding mode, and the driving device 4 is arranged in the accommodating cavity and drives the push rod 3 to do linear motion; a push rod hole 11 is formed in the end part, opposite to the push rod 3, of the shell 1 in a penetrating mode so that the push rod 3 can extend out and retract; the inner wall of the shell 1 is provided with a silencing structure which is formed by arranging a plurality of silencing protrusions 12, and gaps are formed between adjacent silencing protrusions 12.

In the present embodiment, the sound deadening projection 12 includes a body portion 121 and a nose portion 122; the main body 121 has a rectangular parallelepiped shape, and the protruding portion 122 has a wedge shape and is integrally connected to one end of the main body 121. The length × width × thickness of the main body 121 =16mm × 10mm × 4.6mm, and the included angle of the convex tip portion 122 is 18.43 ° × 2.

In this embodiment, a sound-deadening protrusion 12 is disposed around the inner side wall of the housing 1.

In this embodiment, the inner side of the case cover 2 is provided with a porous foam block 21; the porous foam blocks 21 are brick-shaped, every three porous foam blocks 21 form a unit, two porous foam blocks 21 are arranged in parallel in each unit, and the other porous foam block 21 is vertically arranged at the end parts of the former two blocks; gaps are arranged between the adjacent hole foam cotton blocks 21.

In this embodiment, a rod cap 5 is sleeved on one end of the push rod 3 close to the push rod hole 11, and the rod cap 5 is made of a rubber material.

In this embodiment, the bottom surface of the housing 1 is provided with a chute 13 for the push rod 3 to be embedded; the upper surface of the push rod 3 is provided with a tooth surface 31; the driving device 4 comprises a motor 41 and a gear shaft 42; the motor 41 is fixed with the housing 1, the gear shaft 42 is connected with the output shaft of the motor 41, and the surface of the gear shaft 42 is provided with a circumferential driving tooth part 421 meshed with the tooth surface 31.

In this embodiment, the end of the gear shaft 42 is provided with an insertion hole 422, the housing 1 is provided with the fixing shaft 14 inserted into the insertion hole 422, and the gear shaft 42 is pressed against the tooth surface 31; a motor fixing bracket 15 is further provided in the housing 1 to fix the motor 41.

In this embodiment, the motor fixing frame 15 includes a first side limiting block 151, a second side limiting block 152, a first end panel 153 at the tail of the motor 41, and a second end panel 154 at the head of the motor 41, which are located at two sides of the motor 41; the first end plate 153 and the second end plate 154 press the motor 41 between the first side stopper 151 and the second side stopper 152 across the motor 41. The contact portions of the first end plate 153, the second end plate 154 and the motor 41 are padded with cushion pads to further reduce noise.

In this embodiment, a limiting groove 16 is formed in the housing 1, a limiting disc 423 is further disposed on the gear shaft 42, and the limiting disc 423 is embedded in the limiting groove 16 to limit the axial displacement of the gear shaft 42.

In this embodiment, the push rod 3 is further provided with two positioning recesses, which are marked as a first positioning recess 32 and a second positioning recess 33; a first microswitch 6 and a second microswitch 7 are also arranged in the shell 1; when the push rod 3 slides to the first limit position, namely the retraction state, the first microswitch 6 sinks into the first positioning recess 32; when the push rod 3 slides to the second limit position, i.e., the extended state, the second microswitch 7 is sunk into the second positioning recess 33.

In this embodiment, the first side limiting block 151 and the second side limiting block 152 are both provided with inner holes inside, so that the lines of the first micro switch 6 and the second micro switch 7 can pass through the inner holes, and the lines are prevented from interfering with moving parts.

Noise testing

The push rod actuator of embodiment 1 is fixedly arranged, when the push rod 3 is pushed out, a simulation load of 80N is applied to the front end of the rod cap 5, and when the push rod 3 is retracted, the simulation load is not applied; the position of the microphone is 1m away from the push rod actuator in the horizontal direction and 1.2m away from the push rod actuator in the vertical direction; the rest of the above-mentioned parts are carried out with reference to the national standard GBT 8059-2016. The test results are shown in table 1. In the comparative example, the case 1 and the case cover 2 of example 1 were replaced with inner wall smooth members, and the remaining portions were not changed.

TABLE 1

It is obvious that the above embodiments are exemplary, and are only a part of the embodiments of the present invention, not all of them. Other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the described embodiments, shall also fall within the scope of protection of the present invention.

Claims

1. The utility model provides a silence push rod executor of drive refrigerator door body motion which characterized in that: comprises a shell (1), a shell cover (2), a push rod (3) and a driving device (4); the shell (1) and the shell cover (2) are detachably covered, and an accommodating chamber is formed inside the shell; the push rod (3) is slidably arranged in the accommodating cavity, and the driving device (4) is arranged in the accommodating cavity and drives the push rod (3) to do linear motion; a push rod hole (11) is formed in the end portion, opposite to the push rod (3), of the shell (1) in a penetrating mode, so that the push rod (3) can extend out and retract; the inner wall of the shell (1) is provided with a silencing structure, the silencing structure is formed by arranging a plurality of silencing bulges (12), and a gap is formed between every two adjacent silencing bulges (12).

2. The silent push rod actuator of claim 1 wherein: the sound attenuation protrusion (12) comprises a body part (121) and a convex tip part (122); the body part (121) is in a cuboid shape, and the convex tip part (122) is in a wedge shape and is integrally connected to one end of the body part (121).

3. The silent push rod actuator of claim 1 wherein: the silencing protrusions (12) are arranged around the inner side wall of the shell (1) in a circle.

4. The silent push rod actuator of claim 1, wherein: the inner side of the shell cover (2) is provided with a porous foam block (21).

5. The silent push rod actuator of claim 4 wherein: the porous foam blocks (21) are brick-shaped, every three porous foam blocks (21) form a unit, two porous foam blocks (21) are arranged in parallel in each unit, and the other porous foam block (21) is vertically arranged at the end parts of the former two porous foam blocks; gaps are arranged between the adjacent hole foam cotton blocks (21).

6. The silent push rod actuator of claim 1, wherein: a rod cap (5) is sleeved at one end, close to the push rod hole (11), of the push rod (3), and the rod cap (5) is made of elastic materials.

7. The silent push rod actuator of claim 1 wherein: the bottom surface of the shell (1) is provided with a sliding groove (13) for the push rod (3) to be embedded in; the upper surface of the push rod (3) is provided with a tooth surface (31); the driving device (4) comprises a motor (41) and a gear shaft (42); the motor (41) is fixed with the shell (1), the gear shaft (42) is connected to an output shaft of the motor (41), and the surface of the gear shaft (42) is provided with a circumferential driving tooth part (421) meshed with the tooth surface (31).

8. The silent push rod actuator of claim 7 wherein: the end part of the gear shaft (42) is provided with an insertion hole (422), a fixed shaft (14) is arranged in the shell (1) and inserted in the insertion hole (422), and the gear shaft (42) is pressed on the tooth surface (31); a motor fixing frame (15) is further arranged in the shell (1) to fix the motor (41).

9. The silent push rod actuator of claim 1 wherein: the push rod (3) is also provided with two positioning recesses which are marked as a first positioning recess (32) and a second positioning recess (33); a first microswitch (6) and a second microswitch (7) are also arranged in the shell (1); when the push rod (3) slides to a first limit position, the first microswitch (6) sinks into the first positioning recess (32); when the push rod (3) slides to a second limit position, the second microswitch (7) sinks into the second positioning recess (33).