Noise reduction servo motor

Abstract

The utility model relates to the technical field of motor noise reduction, and more specifically relates to a noise reduction servo motor comprising a motor main body, a first conduction member and a noise reduction assembly. The motor main body is provided with a working inner cavity for a rotor and a stator to work, the first conduction piece is arranged on the motor main body, the noise reduction assembly is arranged on the outer side of the motor main body, the noise reduction assembly is provided with a closed noise reduction inner cavity, the first conduction piece is arranged in a hollow penetrating mode, and the first conduction piece is arranged in the noise reduction inner cavity. And the first conduction piece is used for communicating the working inner cavity with the noise reduction inner cavity. According to the noise reduction servo motor, sound waves can be prevented from being accumulated in the working inner cavity, noise sound waves are consumed from the source, and the purpose of noise reduction is achieved; according to the noise reduction servo motor, the noise reduction assembly can be arranged at the position away from the motor body through the position arrangement of the first conduction piece, and the problem that heat dissipation of the motor body is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motor noise reduction, and more specifically, to a noise reduction servo motor. Background Art

[0002] Servo motor refers to the motor that controls the operation of mechanical components in the servo system. It is an auxiliary motor indirect speed change device, which is divided into two categories: DC and AC servo motors. The servo motor can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator and has the characteristics of small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft.

[0003] When the servo motor is working, it drives the permanent magnet rotor to rotate by inputting pulses into the coil inside the stator to form a magnetic field. Therefore, the coil of the servo motor will generate heat during use. When the temperature is higher than the preset temperature, the insulation layer outside the coil will melt and be damaged. In addition, since the servo motor rotates at a high speed, usually within 2000RPM or 3000RPM, the friction sound between the output shaft and the end cover of the servo motor is more intense, resulting in a high noise problem. Therefore, the design of the servo motor needs to take into account both heat dissipation and noise reduction.

[0004] For example, a Chinese utility model patent with publication number CN214154241 U discloses a servo motor with noise reduction, which includes a motor housing, a rear end cover, a front end cover, and a rotating shaft with a coil sleeved in the middle. The noise reduction is achieved by setting a through hole in the motor housing, connecting the through hole with a noise reduction cover set on the outer surface, gluing sound-absorbing cotton inside the noise reduction cover, and installing a sound insulation board on the upper part of the housing. However, the noise reduction cover, sound-absorbing cotton, and sound insulation board of the servo motor with noise reduction will seriously affect the heat dissipation effect of the servo motor itself, affect the overload capacity of the servo motor, and shorten the service life of the servo motor.

[0005] Therefore, it is necessary to design a servo motor that does not affect heat dissipation and can achieve noise reduction effect. Utility Model Content

[0006] The main purpose of the utility model is to provide a noise reduction servo motor, aiming to solve the problem that the servo motor in the prior art cannot take into account both heat dissipation and noise reduction at the same time.

[0007] In order to solve the above technical problems, a noise reduction servo motor is proposed, comprising: a motor body, a first conductive member and a noise reduction component;

[0008] The motor body is provided with a working inner cavity for the rotor and the stator to work, the first conductive member is arranged on the motor body, the noise reduction component is arranged on the outside of the motor body, the noise reduction component is provided with a closed noise reduction inner cavity, the first conductive member is arranged hollow and through, and the first conductive member is used to connect the working inner cavity and the noise reduction inner cavity.

[0009] In any of the above technical solutions, further, the noise reduction component is arranged in parallel with the motor body, and a gap is left between the noise reduction component and the motor body.

[0010] In any of the above technical solutions, further, the motor body includes a housing, an output shaft, a first end cover and a second end cover;

[0011] The shell is hollow and penetrates through, the first end cover and the second end cover are respectively covered at two ends of the shell, and the shell, the first end cover and the second end cover jointly define the working inner cavity;

[0012] The rotor is rotatably disposed on the first end cover and the second end cover, the stator is disposed in the housing, and the stator and the rotor are coaxially disposed;

[0013] The output shaft is rotatably disposed on the first end cover, and the output shaft is coaxially and fixedly disposed with the rotor;

[0014] The first conductive member is disposed at a connection between the first end cover and the housing.

[0015] In any of the above technical solutions, further, the first conductive member includes a conduit portion, a sound receiving portion and a baffle portion;

[0016] The shell is provided with a fixing groove, the conduit portion is arranged in the fixing groove, and the noise reduction component is arranged at an end of the conduit portion away from the shell;

[0017] The sound receiving part is communicated with the conduit part, and the sound receiving part is arranged in the shell. The sound receiving part is provided with two openings both communicated with the working inner cavity, and the two openings are respectively facing the first end cover and the shell. The baffle part is arranged between the two openings, and the baffle part extends to the conduit part.

[0018] In any of the above technical solutions, further, it also includes a second conductive member;

[0019] The second conductive member is arranged at the connection between the second end cover and the shell, and the second conductive member is arranged hollow and through, and the second conductive member is used to connect the working inner cavity and the noise reduction inner cavity.

[0020] In any of the above technical solutions, further, the noise reduction components are symmetrically arranged in two.

[0021] The beneficial effects are:

[0022] The noise reduction servo motor of the present application connects the working inner cavity where the rotor and stator inside the motor work with the noise reduction inner cavity in the external noise reduction component by setting a first conductive member, so that the noise generated in the working inner cavity due to the rotation of the rotor itself and the noise generated by the friction between the rotor and the motor body can be transmitted to the noise reduction inner cavity outside the motor body, and the noise can be consumed or eliminated through the noise reduction inner cavity; and the noise reduction servo motor of the present application transmits noise sound waves through the first conductive member set throughout, so that the noise reduction component can be set at any position outside the motor body, which can avoid affecting the heat dissipation of the motor body, and thus the noise reduction servo motor of the present application can achieve the effect of both noise reduction and heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a noise reduction servo motor of the utility model;

[0025] Figure 2 It is a partial structural cross-sectional schematic diagram of a noise reduction servo motor of the utility model;

[0026] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Motor body; 101. Working inner cavity; 102. Housing; 103. Output shaft; 104. First end cover; 105. Second end cover; 106. Rotor; 107. Stator;

[0029] 2. first conductive member; 201. conduit portion; 202. sound receiving portion; 203. baffle portion;

[0030] 3. Noise reduction component; 301. Noise reduction inner cavity;

[0031] 4. The second conducting member. DETAILED DESCRIPTION

[0032] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0034] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model provides a noise reduction servo motor, which is mainly used for reducing the noise of the servo motor without affecting the heat dissipation of the servo motor.

[0038] A noise reduction servo motor of the present application is described in detail through the following embodiments.

[0039] Embodiment 1:

[0040] In this embodiment, if Figures 1 to 3 As shown, the noise reduction servo motor comprises: a motor body 1, a first conductive member 2 and a noise reduction component 3;

[0041] The motor body 1 is provided with a working inner cavity 101 for the rotor 106 and the stator 107 to work, the first conductive member 2 is arranged on the motor body 1, the noise reduction component 3 is arranged on the outside of the motor body 1, the noise reduction component 3 is provided with a closed noise reduction inner cavity 301, the first conductive member 2 is hollow and through-arranged, and the first conductive member 2 is used to connect the working inner cavity 101 and the noise reduction inner cavity 301.

[0042] In the present technical solution, the motor body 1 is often arranged horizontally, the rotor 106 is coaxially rotatably arranged on the motor body 1, the stator 107 is coaxially arranged on the outer ring of the rotor 106, and one end of the rotor 106 extends to the outside of the motor body 1 to form the output shaft 103 of the servo motor. In addition, an encoder (not shown in the figure) corresponding to the rotor 106 and located away from the end of the output shaft 103 is arranged in the motor body 1 to record the rotation angle of the rotor 106 and output the information; a servo driver (not shown in the figure) electrically connected to the encoder and the stator 107 is also arranged on the outside of the electronic body, which is used to output current to control the rotation of the rotor 106 on the one hand, to correct the rotation angle of the rotor 106 on the other hand, and to connect to an external power supply and rectify the power supply voltage on the other hand.

[0043] The noise reduction component 3 is a hollow sealed shell structure, the hollow inner cavity of the noise reduction component 3 is the noise reduction inner cavity 301, the inner wall of the noise reduction component 3 is fixed with sound-absorbing cotton, the outer shell of the noise reduction component 3 is provided with a through hole for communicating with the first conductive component 2, the outer end of the first conductive component 2 is connected with the noise reduction inner cavity 301 in the noise reduction component 3 through the through hole; the motor body 1 is provided with a through hole for the first conductive component 2 to pass through, the first conductive component 2 is fixed at the through hole, and the inner end of the first conductive component 2 extends into the working inner cavity 101, and the first conductive component 2 is a hollow structure with openings at both ends.

[0044] The noise reduction servo motor of the present application connects an inner cavity for noise reduction to the original working inner cavity 101 of the motor body 1 through the first conductive part 2. The noise generated by the motor body 1 during operation transmits the sound waves in the working inner cavity 101 to the noise reduction inner cavity 301 through the first conductive part 2, and consumes and digests the kinetic energy of the sound waves in the noise reduction inner cavity 301. Compared with the servo motor in the prior art which only has a working inner cavity 101, the noise reduction servo motor of the present application can avoid the accumulation of sound waves in the working inner cavity 101, consume the noise waves from the source, and achieve the purpose of noise reduction.

[0045] Furthermore, the noise reduction servo motor of the present application can set the noise reduction component 3 at a position away from the motor body 1 through the position setting of the first conductive member 2, thereby avoiding the problem of affecting the heat dissipation of the motor body 1 itself.

[0046] In this embodiment, the noise reduction component 3 is arranged in parallel with the motor body 1 , and a gap is left between the noise reduction component 3 and the motor body 1 .

[0047] In the present technical solution, the extension direction of the shell of the noise reduction component 3 is arranged parallel to the extension direction of the rotor 106, and a gap is left between the shell of the noise reduction component 3 and the outer side wall of the motor body 1. When in use, since there is a gap between the noise reduction component 3 and the motor body 1, air can flow through the side of the motor body 1 corresponding to the noise reduction component 3, so as to achieve the purpose of self-heating of the side of the motor body 1.

[0048] In this embodiment, the motor body 1 includes a shell 102, an output shaft 103, a first end cover 104 and a second end cover 105; the shell 102 is hollow and through, and the first end cover 104 and the second end cover 105 are respectively covered on both ends of the shell 102, and the shell 102, the first end cover 104 and the second end cover 105 jointly define a working inner cavity 101; the rotor 106 is rotatably arranged on the first end cover 104 and the second end cover 105, and the stator 107 is arranged in the shell 102, and the stator 107 and the rotor 106 are coaxially arranged; the output shaft 103 is rotatably arranged on the first end cover 104, and the output shaft 103 and the rotor 106 are coaxially fixedly arranged; the first conductive member 2 is arranged at the connection between the first end cover 104 and the shell 102.

[0049] In the present technical solution, the housing 102 of the motor body 1 is horizontally arranged in the front-to-back direction, and the housing 102 is arranged through in the front-to-back direction. A circular through hole is arranged in the housing 102, and the outer side wall of the stator 107 is fitted and fixed in the through hole. The first end cover 104 and the second end cover 105 are detachably arranged on the front and rear sides of the housing 102, respectively. The front end of the rotor 106 is coaxially fixed with the output shaft 103, and the rotor 106 is rotatably arranged on the first end cover 104 and the second end cover 105. A groove for the first conductive member 2 to pass through is arranged on the front side of the housing 102, and the outer side wall of the first conductive member 2 is adapted to the groove, so that the first end cover 104 is sealed when the cover is closed.

[0050] It is worth noting that since the noise of the servo motor during operation mainly comes from the rotation of the rotor 106 itself and the friction between the rotor 106 and the end cover, and since the stator 107 is a circumferentially closed fixed structure, the noise in the working cavity 101 is mainly concentrated at the connection between the end cover and the shell 102. Therefore, the first conductive member 2 is arranged at the connection between the first end cover 104 and the shell 102 to guide the sound waves at the strongest noise point in the working cavity 101, thereby significantly reducing the noise.

[0051] In this embodiment, the first conductive member 2 includes a conduit portion 201, a sound receiving portion 202 and a baffle portion 203; the shell 102 is provided with a fixing groove, the conduit portion 201 is arranged in the fixing groove, and the noise reduction component 3 is arranged at an end of the conduit portion 201 away from the shell 102; the sound receiving portion 202 is connected with the conduit portion 201, and the sound receiving portion 202 is arranged in the shell 102, the sound receiving portion 202 is provided with two openings both connected with the working inner cavity 101, and the two openings are respectively facing the first end cover 104 and the shell 102, the baffle portion 203 is arranged between the two openings, and the baffle portion 203 extends to the conduit portion 201.

[0052] In the present technical solution, the noise reduction component 3 is arranged on the left side of the shell 102, and the duct portion 201 is arranged as a straight or broken line hollow tube structure. The groove on the aforementioned shell 102 is a fixing groove, and the duct portion 201 is snapped into the fixing groove; the sound receiving portion 202 is arranged in a circular shape, and the left side wall of the sound receiving portion 202 is provided with a through hole connected to the right side of the duct portion 201, and the sound receiving portion 202 is arranged to penetrate from front to back, and the front and rear sides of the sound receiving portion 202 form two openings that are connected to the working inner cavity 101; the baffle portion 203 is a sheet structure, which is symmetrically arranged in the middle of the sound receiving portion 202 in the front-to-back direction, and the left side end of the baffle portion 203 extends into the duct portion 201.

[0053] When in use, the front and rear openings of the sound collecting portion 202 are one facing forward and the other facing backward. The front opening corresponds to the first end cover 104, and can collect the noise at the rotor 106 and the first end cover 104, and transmit it to the noise reduction inner cavity 301 through the guiding effect of the baffle portion 203 and the duct portion 201; the rear opening corresponds to the rotor 106, and can guide the noise generated when the rotor 106 rotates itself.

[0054] In some technical solutions, two first conductive members 2 are provided which are symmetrical in vertical direction, and both of the two first conductive members 2 are connected to the noise reduction component 3 on the left side.

[0055] In this embodiment, a second conductive member 4 is also included;

[0056] The second conductive member 4 is disposed at the connection between the second end cover 105 and the shell 102 . The second conductive member 4 is hollow and penetrates through the second conductive member 4 . The second conductive member 4 is used to connect the working inner cavity 101 and the noise reduction inner cavity 301 .

[0057] In the present technical solution, the second conductive member 4 is symmetrically arranged with the first conductive member 2 front and back, and the second conductive member 4 has the same structure as the first conductive member 2. The rear side surface of the shell 102 is provided with a groove for fixing the second conductive member 4, and the openings on the front and rear sides of the second conductive member 4 face the rotor 106 and the second end cover 105 respectively.

[0058] Since the space between the rotor 106 and the stator 107 is a circumferentially closed space, the rotation of the peripheral airflow generated by the rotor 106 when it rotates will propagate in two directions, forward or backward. At the same time, the first conductive member 2 and the second conductive member 4 are arranged to collect the noise at the front and rear end covers to enhance the noise reduction effect.

[0059] In this embodiment, two noise reduction components 3 are symmetrically arranged.

[0060] In this technical solution, two noise reduction components 3 are symmetrically arranged, and four first conductive members 2 and second conductive members 4 are symmetrically arranged. That is, one noise reduction component 3 is connected to the working inner cavity 101 through two first conductive members 2 and two second conductive members 4 at the same time, thereby improving the structural symmetry.

[0061] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A noise reduction servo motor, characterized in that: include: A motor body (1), a first conductive member (2) and a noise reduction component (3); The motor body (1) is provided with a working inner cavity (101) for the rotor (106) and the stator (107) to work, the first conductive member (2) is arranged on the motor body (1), the noise reduction component (3) is arranged on the outside of the motor body (1), the noise reduction component (3) is provided with a sealed noise reduction inner cavity (301), the first conductive member (2) is arranged hollow and through, and the first conductive member (2) is used to connect the working inner cavity (101) and the noise reduction inner cavity (301).

2. The noise reduction servo motor according to claim 1, characterized in that: The noise reduction component (3) is arranged in parallel with the motor body (1), and a gap is left between the noise reduction component (3) and the motor body (1).

3. The noise reduction servo motor according to claim 1, characterized in that: The motor body (1) comprises a housing (102), an output shaft (103), a first end cover (104) and a second end cover (105); The shell (102) is hollow and through-arranged, the first end cover (104) and the second end cover (105) are respectively covered at two ends of the shell (102), and the shell (102), the first end cover (104) and the second end cover (105) jointly define the working inner cavity (101); The rotor (106) is rotatably disposed on the first end cover (104) and the second end cover (105), the stator (107) is disposed in the housing (102), and the stator (107) and the rotor (106) are coaxially disposed; The output shaft (103) is rotatably disposed on the first end cover (104), and the output shaft (103) and the rotor (106) are coaxially and fixedly disposed; The first conductive member (2) is arranged at the connection between the first end cover (104) and the shell (102).

4. The noise reduction servo motor according to claim 3, characterized in that: The first conductive member (2) comprises a conduit portion (201), a sound receiving portion (202) and a baffle portion (203); The shell (102) is provided with a fixing groove, the conduit portion (201) is arranged in the fixing groove, and the noise reduction component (3) is arranged at an end of the conduit portion (201) away from the shell (102); The sound receiving portion (202) is in communication with the conduit portion (201), and the sound receiving portion (202) is arranged in the shell (102). The sound receiving portion (202) is provided with two openings both in communication with the working inner cavity (101), and the two openings are respectively facing the first end cover (104) and the shell (102), and the baffle portion (203) is arranged between the two openings, and the baffle portion (203) extends to the conduit portion (201).

5. The noise reduction servo motor according to claim 3, characterized in that: Also includes a second conductive member (4); The second conductive member is arranged at the connection between the second end cover (105) and the shell (102), and the second conductive member (4) is arranged hollow and through, and the second conductive member (4) is used to connect the working inner cavity (101) and the noise reduction inner cavity (301).

6. The noise reduction servo motor according to claim 1, characterized in that: The noise reduction components (3) are symmetrically arranged in two.

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