Bass electric push rod for realizing noise reduction

Abstract

The utility model relates to the technical field of electric push rods, in particular to a bass electric push rod for realizing noise reduction, which comprises a shell part, an inner driving part and an inner transmission part, the shell part comprises an upper shell part and a lower shell part which are in threaded connection; the inner driving part is assembled in the lower shell part, the inner transmission part is assembled in the upper shell part, and the inner driving part is used for driving the inner transmission part to push; wherein a positioning protruding part is arranged on the inner wall of the lower shell part, the inner driving part is provided with a driving motor, the driving motor is in a step type and comprises an upper layer and a lower layer, the joint of the upper layer and the lower layer of the driving motor abuts against the positioning protruding part, and a gap is reserved between the driving motor and the inner wall of the lower shell part; compared with noise caused by vibration due to the fact that the driving motor and the outer shell abut against each other, the gap is reserved between the driving motor and the inner wall of the lower shell part, and the damping rubber gasket is arranged between the driving motor and the connecting shaft assembly, so that the noise caused by vibration to the outside can be effectively reduced after forming and assembling.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric push rod technical field especially is a kind of low-frequency electric push rod for realizing noise reduction. BACKGROUND

[0002] Electric push rod is a kind of mechanical device for converting the rotary motion of motor into linear motion. Its core components include motor, transmission mechanism (such as screw, gear or belt), push rod body and control unit, with characteristics of precise control, high load capacity and programmability, widely used in industrial automation, medical equipment, home and other fields.

[0003] In the design of electric push rod, the compactness of structure assembly needs to be considered, and its low noise also needs to be realized to meet the noise standard of conventional electric push rod (such as in the use scene of office equipment, household appliances, etc., the standard of electric push rod used is below 60dB), thus, in order to further realize its noise reduction effect, a new low-frequency electric push rod structure can be designed. SUMMARY

[0004] The utility model aims at providing a technical scheme that can solve the above problems.

[0005] A low-frequency electric push rod for realizing noise reduction, comprising a shell part, an inner drive part and an inner transmission part. The shell part includes an upper shell part and a lower shell part connected by threads. The inner drive part is assembled in the lower shell part, and the inner transmission part is assembled in the upper shell part. The inner drive part is used to drive the inner transmission part. The lower shell part has a positioning protrusion on its inner wall. The inner drive part is a drive motor. The drive motor has a stepped shape with an upper layer and a lower layer. The connection between the upper layer and the lower layer of the drive motor abuts the positioning protrusion, and there is a gap between the drive motor and the inner wall of the lower shell part.

[0006] Further, the upper end of the drive motor has a shell surface, which extends outwardly to form a drive shaft. The end of the drive shaft is a flat plug. The inner transmission part is a threaded rod, which has an assembly part at one end connected to the drive shaft. The assembly part has a matching plug hole for the flat plug. The threaded rod has a movable shaft body on its surface. The movable shaft body is connected to a rod body, and the outer surface of the movable shaft body has a sliding block. The inner surface of the upper shell part has a linear slide.

[0007] Further, the end of the upper shell part has a through hole for the rod body to extend and retract.

[0008] Further, an intermediate connecting piece is assembled between the inner driving part and the inner transmission part; the intermediate connecting piece comprises a connecting shaft assembly installed at a position where the insertion column is inserted into the insertion hole, and a fixed seat body fixing the driving motor, and an outer surface layer of the fixed seat body is fixedly screwed with an inner surface layer of the upper shell part; the fixed seat body and the shell part at an end part of the driving motor are matched with positioning screw holes, the fixed seat body and the driving motor are assembled by screws, and a shock-absorbing rubber pad is arranged between the fixed seat body and the driving motor.

[0009] Further, the connecting shaft assembly comprises a sleeve, and a pin is inserted through the sleeve and fixedly penetrates the threaded rod.

[0010] Further, the connecting shaft assembly and the movable shaft body are further provided with a bearing which is sleeved on an outer surface of the threaded rod.

[0011] Further, the lower shell part is further provided with a transmission line for realizing signal connection with the driving motor.

[0012] The utility model discloses beneficial effects are:

[0013] (1) relative to the noise caused by the vibration that the driving motor and the shell abut, the utility model discloses a gap between the driving motor and the inner wall of the lower shell part, to effectively reduce the noise of the vibration to the outside;

[0014] (2) in the process that the driving motor is assembled with the inner transmission part through the connecting shaft assembly, the shock-absorbing rubber pad is loaded between the driving motor and the connecting shaft assembly, realizes the change from rigid assembly to flexible assembly, and thus in the process of torque transmission, the generation of noise can be further effectively reduced;

[0015] (3) the assembly of the driving motor and the threaded rod is matched flat assembly, and the flat insertion column design enhances the torque transmission efficiency, and the transmission of power is more stable when driving, so as to ensure that the threaded rod rotates;

[0016] (4) while the driving motor and the threaded rod are assembled through the connecting shaft assembly, the fixed seat body is used as a connecting intermediate, so that the upper shell part outside and the driving motor contained in the lower shell part are fixed at the same time, and the assembly is further compact.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the utility model in non-working state.

[0019] Figure 2 It is the structure schematic diagram of the utility model in working state.

[0020] Figure 3 As shown in Figure 1 Decomposed structure diagram in non-working state.

[0021] Figure 4 As shown in Figure 2 Decomposed structure diagram in non-working state.

[0022] Figure 5 As shown in As shown in

[0023] As shown in Figure 6 As shown in As shown in

[0024] As shown in Figure 7 As shown in As shown in

[0025] As shown in Figure 8 As shown in As shown in

[0026] The figure mark in the drawing is respectively:

[0027] DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0029] Please refer to Figures 1-8 The present application comprises a shell part 1, an inner driving part 2 and an inner transmission part 3. The shell part 1 comprises a screw-connected upper shell part 101 and lower shell part 102. The inner driving part 2 is assembled in the lower shell part 102, and the inner transmission part 3 is assembled in the upper shell part 101. The inner driving part 2 is used to drive the inner transmission part 3 to push. The inner wall of the lower shell part 102 is provided with a positioning protruding part 105. The inner driving part 2 is provided as a driving motor 201. The driving motor 201 is shaped as a step type with an upper layer and a lower layer. The connection position of the upper layer and the lower layer of the driving motor 201 abuts against the positioning protruding part 105, and a gap 205 is left between the driving motor 201 and the inner wall of the lower shell part 102.

[0030] The technical scheme mainly lies in the assembly of the structure.

[0031] The outer shell part 1, the inner driving part 2 and the inner transmission part 3 are assembled in cooperation, specifically, the outer shell part 1 comprises a screw-connected upper shell part 101 and a lower shell part 102, wherein the upper shell part 101 is provided with threads on the outer surface layer, and the lower shell part 102 is provided with threads on the inner surface layer, so that after the screw assembly of the upper shell part 101 and the lower shell part 102 is completed, the overall appearance of the surface layer is smooth and simple, the internal mechanism is protected, and the structural stability is enhanced.

[0032] The principle of reducing noise for internal assembly is as follows:

[0033] As shown in the drawings, the lower shell part 102 is provided with a positioning protrusion 105 on the inner wall, and the driving motor 201 is shaped as a stepped type with an upper layer and a lower layer. The connection between the upper layer and the lower layer of the driving motor 201 abuts at the position of the positioning protrusion 105. The assembly is that the driving motor 201 is placed in the lower shell part 102 from the first end, the wall thickness of the upper layer of the driving motor is thickened, and the wall thickness of the upper layer of the driving motor is just able to abut the positioning protrusion 105. Then, the plug hole 303 and the plug column 204 are matched, and the fixed seat body 402 is assembled to finally form the assembly. After the assembly is completed, the positioning protrusion 105 can be used as the positioning of the installation position of the driving motor 201, and can support and bear at the same time, so that the surface layer of the driving motor 201 and the inner wall of the lower shell part 102 are empty. Therefore, compared with the noise caused by the vibration of the driving motor 201 and the outer shell, the assembly of the present technical mode can effectively reduce the noise to the outside.

[0034] Meanwhile, the driving motor 201 is provided with a shell part surface 202, the shell part surface 202 extends outwardly and has a driving shaft 203, and the end of the driving shaft 203 is a flat plug column 204. The inner transmission part 3 is provided with a threaded rod 301, one end of the threaded rod 301 is provided with an assembly part 302 connected with the driving shaft 203, and the assembly part 302 is provided with a plug hole 303 matched with the flat plug column 204. That is, under the cooperation of the plug column 204 and the plug hole 303, the final shell realizes power transmission, that is, when the driving motor 201 drives, the threaded rod 301 rotates synchronously, and the plug column 204 is designed to enhance the torque transmission efficiency.

[0035] Meanwhile, in order to reinforce the assembly connection of the two, an intermediate connecting piece 4 is arranged at the position where the insertion column 204 is inserted into the insertion hole 303, and specifically includes a connecting shaft assembly 401 and a fixing seat body 402. For the connecting shaft assembly 401, as shown in the figure, it mainly includes a sleeve 403, a pin 404 is inserted through the sleeve 403, the pin 404 is fixed through the threaded rod 301, the sleeve 403 is provided with a clamping portion for clamping the assembly piece 302, and the pin 404 is inserted into the threaded hole for fixation, that is, the threaded rod 301 and the driving shaft 203 of the driving motor 201 are sleeved with the sleeve 403 to realize stable power transmission and avoid radial deviation of the two. The outer surface of the fixing seat body 402 is provided with a thread, and the inner surface of the upper shell part 101 is provided with a thread, that is, the fixing seat body 402 is connected with the upper threaded part, and at the same time, the fixing seat body 402 is matched with a positioning screw hole 405 at the shell part surface 202 at the end of the driving motor 201, and the fixing seat body 402 is assembled with the driving motor 201 through a screw, so that the driving motor 201 and the upper shell part 101 are further reinforced and fixed under the action of the fixing seat body 402, and the stability is ensured.

[0036] The above is the main structure with compact and firm assembly.

[0037] In order to realize the pushing of the electric push rod, the through hole 104 for the extension and retraction of the rod body 305 is arranged at the end of the upper shell part 101, the dynamic shaft body 304 is assembled on the surface of the threaded rod 301, the dynamic shaft body 304 is connected with the rod body 305, and the sliding block 306 is arranged on the outer surface of the dynamic shaft body 304. The linear slide 307 is arranged on the inner surface of the upper shell part 101, and the sliding block 306 is located in the linear slide 307. The working principle of the rod body 305 is as follows: when the threaded rod 301 is rotated under the driving of the driving motor 201, the dynamic shaft body 304 will synchronously rotate, and under the cooperation of the sliding block 306 on the outer surface of the dynamic shaft body 304 and the linear slide 307 arranged on the inner surface of the upper shell part 101, the dynamic shaft body 304 will move along the linear slide in a guided manner, so that the rod body 305 will be guided to extend to the through hole 104 or retract.

[0038] A bearing 308 is arranged on the surface of the threaded rod 301 between the connecting shaft assembly 401 and the dynamic shaft body 304, which is used to assist the threaded rod 301 to reduce friction and avoid radial deviation to cause hard collision with the inner wall of the upper shell part 101.

[0039] The lower shell part 102 is also provided with a transmission line 103 for realizing signal connection with the driving motor 201, and the transmission line 103 is used as the control of the driving motor 201.

[0040] Meanwhile, in order to further play a damping effect, in the design, the fixed seat body 402 and the driving motor 201 are provided with a damping rubber pad 206, the purpose is: the driving motor 201 is assembled with the inner transmission part 3 through the connecting shaft assembly 401, and the damping rubber pad 206 is loaded between the driving motor 201 and the connecting shaft assembly 401, so that the rigid assembly is changed into flexible assembly, thereby in the process of torque transmission, the generation of noise can also be effectively further reduced.

[0041] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications within the scope of the technical scheme of the present application by using the disclosed technical content, and any simple modification, equivalent change and modification of the above embodiment within the scope of the technical scheme of the present application are all within the scope of the present application.

Claims

1. A bass-low frequency electric linear actuator for noise reduction, characterized in that: It includes an outer shell part (1), an inner drive part (2) and an inner transmission part (3); the outer shell part (1) includes an upper shell part (101) and a lower shell part (102) connected by threads; the inner drive part (2) is assembled in the lower shell part (102), the inner transmission part (3) is assembled in the upper shell part (101), and the inner drive part (2) is used to drive the inner transmission part (3) to push; The lower shell (102) has a positioning protrusion (105) on its inner wall. The inner drive part (2) is a drive motor (201). The drive motor (201) is stepped, with an upper and lower layer. The connection between the upper and lower layers of the drive motor (201) abuts against the positioning protrusion (105), and a gap (205) is left between the drive motor (201) and the inner wall of the lower shell (102).

2. The bass electric fader for noise reduction according to claim 1, characterized in that: The upper end of the drive motor (201) is provided with a shell surface (202), and a drive shaft (203) extends outward from the shell surface (202), and the end of the drive shaft (203) is a flat plug (204); The internal transmission part (3) is configured as a threaded rod (301), and one end of the threaded rod (301) is provided with an assembly (302) connected to the drive shaft (203). The assembly (302) is provided with a socket (303) that matches the flat plug (204). The threaded rod (301) is fitted with a movable shaft (304) on its surface. The movable shaft (304) is connected to a rod body (305). The movable shaft (304) is provided with a slider (306) on its outer surface. The upper shell (101) is provided with a linear slide (307) on its inner surface. The slider (306) is located in the linear slide (307).

3. A bass electric fader for noise reduction according to claim 2, characterized in that: The upper shell (101) has a through hole (104) at its end for the rod (305) to extend and retract.

4. The bass electric fader for noise reduction according to claim 1, characterized in that: An intermediate connector (4) is assembled between the internal drive part (2) and the internal transmission part (3); the intermediate connector (4) includes a coupling assembly (401) installed at the insertion hole (303) of the plug (204) and a fixing seat (402) for fixing the drive motor (201), the outer surface of the fixing seat (402) is threaded to the inner surface of the upper shell (101); The mounting base (402) and the housing surface (202) at the end of the drive motor (201) are fitted with positioning screw holes (405). The mounting base (402) and the drive motor (201) are assembled by screws, and a shock-absorbing rubber pad (206) is provided between the mounting base (402) and the drive motor (201).

5. A bass electric fader for noise reduction according to claim 4, characterized in that: The coupling assembly (401) includes a sleeve (403), on which a pin (404) is inserted, and the pin (404) passes through the threaded rod (301) for fixation.

6. A bass electric fader for noise reduction according to claim 4, characterized in that: A bearing (308) is also provided between the coupling assembly (401) and the moving shaft (304) and is sleeved on the surface of the threaded rod (301).

7. A bass electric fader for noise reduction according to claim 1, characterized in that: The lower housing (102) is also provided with a transmission line (103) for signal connection with the drive motor (201).

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