Modularized floor scrubber mute system
Through the modularly designed floor scrubber silent system, the motor vibration is shared by the spring and articulated structure, and the lubrication compensation is automatically performed when the vibration is large, which solves the problems of large noise and poor noise reduction effects of traditional floor scrubbers, and effectively reduces noise and extends the service life.
Patent Information
- Application Number
- CN202510092179.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2045-01-21
AI Technical Summary
The water-absorbing motor of traditional floor scrubbers is operating with high noise, and the existing shock absorption methods cannot automatically lubricate the interior according to the shock absorption intensity, resulting in poor noise reduction effect.
A modular floor scrubber silent system is designed, including housing assembly, noise reduction assembly and lubrication assembly. The noise reduction assembly divides the motor vibration through the spring and the articulated structure, and automatically triggers lubrication compensation when the vibration is large, and lubricates the slide barrel through the lubrication assembly.
It effectively reduces the noise of the water-absorbing motor, extends the service life, and prevents excessive use of the spring.
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Figure CN119606271A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of floor scrubbers, and in particular to a modular floor scrubber silencing system. Background Art
[0002] At present, the traditional floor scrubber has the problem of high noise from vacuum motor operation. In some high-end office buildings, hospitals, schools and other places that require quiet, the high noise will have a negative impact on the environment and is not suitable for use. For floor scrubbers, the noise mainly comes from the vibration of the internal water suction motor, so reducing the motor vibration is one of the effective ways to reduce noise. The existing shock absorption usually adds some vibration reduction materials around or inside the motor, or uses a shock absorption structure to dampen the motor. However, this method cannot automatically lubricate the inside according to the shock absorption strength, and there is a problem of poor noise reduction effect. Summary of the invention
[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.
[0004] In view of the above-mentioned problems existing in the existing modular floor scrubber silent system, the present invention is proposed.
[0005] Therefore, the object of the present invention is to provide a modular floor scrubber silent system, which can effectively reduce the noise of the water suction motor and automatically perform lubrication compensation in the slide tube when encountering large vibrations.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a modular floor scrubber silent system includes a shell assembly, including a transmission plate, a water suction motor arranged on the transmission plate, an upper silent cover and a lower silent cover sleeved on the outside of the water suction motor, a mounting plate connected to the lower silent cover, and a silencer arranged on the lower silent cover; a noise reduction assembly, including a fixed plate, a pillar arranged on the fixed plate, a slide hinged to the pillar, a support rod slidably connected to the slide, a first spring sleeved outside the support rod, a center rod hinged to the support rod, and a second spring sleeved outside the center rod; and a lubrication assembly, wherein the lubrication assembly is arranged on the fixed plate.
[0007] As a preferred solution of the modular floor scrubber silent system described in the present invention, wherein: the water suction motor is fixedly connected to the upper silent cover and the lower silent cover, the upper silent cover is also provided with a heat insulation pad, the inner walls of the upper silent cover and the lower silent cover are both provided with silent cotton, the mounting sheet metal is fixedly set at the bottom of the lower silent cover, the bottom of the lower silent cover is also provided with a heat dissipation cover, the inner wall of the heat dissipation cover is provided with sealing cotton, the silencer pipe is connected to the water suction motor, and a sealing pad is provided between the upper silent cover and the lower silent cover.
[0008] As a preferred solution of the modular floor scrubber silent system of the present invention, there are four pillars, which are arranged at the four corners of a square, each of which is hinged to two slide cylinders, which are perpendicular to each other, one end of the support rod is sleeved in the slide cylinder, and the other end is hinged to the center rod.
[0009] As a preferred solution of the modular floor scrubber silent system of the present invention, wherein: the first spring is arranged in the slide cylinder, one end of the first spring is fixedly connected to the end of the support rod, and the other end is fixedly connected to the end of the slide cylinder close to the center rod, the center rod is arranged in the center between the two pillars, four center rods are arranged, both sides of the center rod are hinged to a support rod respectively, and the center rod is slidably connected to the fixed plate.
[0010] As a preferred solution of the modular floor scrubber silent system of the present invention, the top of the center rod is fixedly connected to the transmission plate, one end of the second spring is fixedly connected to the center rod, and the other end is fixedly connected to the fixing plate.
[0011] As a preferred solution of the modular floor scrubber silent system of the present invention, the lubrication assembly includes a mounting seat, a water inlet pipe, a water outlet pipe and a sliding chamber arranged on the mounting seat, a piston slidably arranged in the sliding chamber, a blocking ball and a third spring arranged in the piston and the water inlet pipe, and a hose connecting the water outlet pipe and the slide cylinder.
[0012] As a preferred solution of the modular floor scrubber silent system of the present invention, wherein: the mounting seat is arranged on the other side of the fixing plate relative to the pillar, the water inlet pipe is connected to the oil tank, the blocking ball is arranged at the water inlet pipe orifice, the blocking ball has a diameter larger than the water inlet pipe orifice diameter, and the third spring is also arranged under the blocking ball, one end of the third spring is fixedly connected to the blocking ball, and the other end is fixedly connected to the inner wall of the mounting seat.
[0013] As a preferred solution of the modular floor scrubber silent system of the present invention, the water inlet pipe is connected to the sliding cavity, the piston is slidably connected to the sliding cavity, the end of the piston outside the mounting seat is fixedly connected to the center rod, a pipeline is opened in the piston, and the pipeline is connected to the sliding cavity.
[0014] As a preferred solution of the modular floor scrubber silent system of the present invention, the blocking ball and the third spring are arranged in the pipeline, the blocking ball is arranged at the pipeline orifice, and the diameter of the blocking ball is larger than the diameter of the pipeline orifice; one end of the third spring is fixedly connected to the blocking ball, and the other end is fixedly connected to the inner wall of the mounting seat.
[0015] As a preferred solution of the modular floor scrubber silent system of the present invention, wherein: the water outlet pipe is connected to the sliding cavity, and the third spring is in a compressed state when at rest; four hoses are provided, one end of the hose is connected to the water outlet pipe, and the other end has two branches, which are respectively connected to two sliding cylinders.
[0016] Beneficial effects of the present invention: The modular floor scrubber silent system of the present invention can effectively reduce the noise of the water suction motor and greatly reduce the noise of the motor operation. The modular design is compatible with a variety of motors, which distributes the motor vibration force to each spring and also distributes the vertical force of the vibration to the horizontal direction, effectively preventing excessive use of the spring; large-amplitude vibration can automatically trigger lubrication compensation, lubricate the connection between the support rod and the slide cylinder, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0018] Figure 1 It is a schematic diagram of the overall structure of the modular floor scrubber silent system of the present invention.
[0019] Figure 2 It is a schematic diagram of the structure of the shell component of the modular floor scrubber silent system of the present invention.
[0020] Figure 3 It is a schematic diagram of the structure of the noise reduction component and the lubrication component of the modular floor scrubber silent system of the present invention.
[0021] Figure 4 It is a schematic diagram of the structure of the noise reduction component of the modular floor scrubber silencing system of the present invention.
[0022] Figure 5 The figure is a schematic diagram of the internal structure of the slide barrel of the modular floor scrubber silent system of the present invention.
[0023] Figure 6 It is a schematic diagram of the structure of the lubrication component of the modular floor scrubber silent system of the present invention.
[0024] Figure 7It is a schematic diagram of the internal structure of the mounting base of the modular floor scrubber silent system of the present invention. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.
[0029] Example 1
[0030] Reference Figure 1-2 is the first embodiment of the present invention, which provides a modular floor scrubber silent system, the system comprising a housing assembly 100, a noise reduction assembly 200 and a lubrication assembly 300, wherein the housing assembly 100 comprises a transmission plate 101, a water suction motor 102 arranged on the transmission plate 101, an upper silent cover 103 and a lower silent cover 104 sleeved on the outside of the water suction motor 102, a mounting plate 105 connected to the lower silent cover 104, and a silencer 106 arranged on the lower silent cover 104; the noise reduction assembly 200 comprises a fixing plate 201, a support 202 arranged on the fixing plate 201, and a support 203 and a support 204 sleeved on the support 203. 2, a hinged slide 203, a support rod 204 slidably connected to the slide 203, a first spring 205 sleeved outside the support rod 204, a center rod 206 hinged to the support rod 204, and a second spring 207 sleeved outside the center rod 206; and a lubricating assembly 300, including a mounting seat 301, a water inlet pipe 302 arranged on the mounting seat 301, a water outlet pipe 303 and a sliding cavity 304, a piston 305 slidably arranged in the sliding cavity 304, a blocking ball 306 and a third spring 307 arranged in the piston 305 and the water inlet pipe 302, and a hose 308 connecting the water outlet pipe 303 and the slide 203.
[0031] Among them, the water suction motor 102 is fixedly connected to the upper silent cover 103 and the lower silent cover 104, and a heat insulation pad 103a is also provided on the upper silent cover 103. The inner walls of the upper silent cover 103 and the lower silent cover 104 are provided with silent cotton 107. The mounting sheet metal 105 is fixedly set at the bottom of the lower silent cover 104. A heat dissipation cover 104a is also provided at the bottom of the lower silent cover 104. The inner wall of the heat dissipation cover 104a is provided with sealing cotton 104c. The silencer 106 is connected to the water suction motor 102, and a sealing pad 104b is provided between the upper silent cover 103 and the lower silent cover 104.
[0032] Operation process: First, for the water absorption motor 102, the upper silent cover 103 and the lower silent cover 104 are equivalent to being sleeved outside the water absorption motor 102, and the water absorption motor 102 is fixed inside it. The top heat insulation pad 103a can be sealed with the air inlet of the sewage tank, and the silent cotton 107 covers the inner wall of the shell component 100 to reduce the noise of the water absorption motor 102 to the greatest extent. The silencer pipe 106 is connected to the interface of the water absorption motor 102, and the sheet metal 105 is installed to connect the lower silent cover 104 with the transmission plate 101. The bottom of the lower silent cover 104 is provided with a heat dissipation cover 104a to remove the heat of the water absorption motor 102. The upper silent cover 103 and the lower silent cover 104 are multiple silent from top to bottom, which can effectively reduce the noise of the motor operation to a large extent.
[0033] Example 2
[0034] Reference Figure 3-7 is the second embodiment of the present invention. In order to reduce the vibration effect of the water suction motor 102, four pillars 202 are provided. The pillars 202 are arranged in a square with four corners. Each pillar 202 is hinged with two slides 203. The two slides 203 are perpendicular to each other. One end of the support rod 204 is sleeved in the slide 203, and the other end is hinged with the center rod 206. The first spring 205 is provided in the slide 203. One end of the first spring 205 is fixedly connected to the end of the support rod 204, and the other end is fixedly connected to the end of the slide 203 close to the center rod 206. The center rod 206 is provided in the center between the two pillars 202. There are four center rods 206. Both sides of the center rod 206 are respectively hinged with a support rod 204. The center rod 206 is slidably connected to the fixed plate 201. The top of the center rod 206 is fixedly connected to the transmission plate 101. One end of the second spring 207 is fixedly connected to the center rod 206, and the other end is fixedly connected to the fixed plate 201.
[0035] The vibration of the water suction motor 102 is transmitted to the center rod 206 through the transmission plate 101. The center rod 206 is set at four points of the square of the transmission plate 101. When the transmission plate 101 vibrates, the center rod 206 is squeezed, and the center rod 206 rises and falls on the fixed plate 201. When the center rod 206 rises and falls and vibrates, it drives one end of the hinged support rod 204 to rise and fall and vibrate. The rising and falling vibration of the center rod 206 is dispersed to the first spring 205 in the support rods 204 on both sides and the second spring 207 on the center rod 206. The tension is used to offset the vibration of the motor; and since four groups of center rods 206 are arranged at the bottom of the transmission plate 101, different vibrations at various positions of the transmission plate 101 can be damped. When the vibration point is not centered, it can also be distributed to each first spring 205 and second spring 207. As can be seen from the figure, the second spring 207 is the main force-bearing spring, and the vibration force of the fluctuation of the center rod 206 can be dispersed to the first spring 205 by the support rod 204. This force-bearing structure can protect the second spring 207, prevent it from excessive expansion and contraction to produce metal fatigue, and increase the service life of the noise reduction component 200.
[0036] In order to perform lubrication compensation in the slide 203, the mounting seat 301 is arranged on the other side of the fixed plate 201 relative to the support 202, the water inlet pipe 302 is connected to the oil tank, a blocking ball 306 is arranged at the mouth of the water inlet pipe 302, the diameter of the blocking ball 306 is larger than the diameter of the mouth of the water inlet pipe 302, and a third spring 307 is arranged under the blocking ball 306, one end of the third spring 307 is fixedly connected to the blocking ball 306, and the other end is fixedly connected to the inner wall of the mounting seat 301. The water inlet pipe 302 is connected to the sliding cavity 304, the piston 305 is slidably connected to the sliding cavity 304, the end of the piston 305 outside the mounting seat 301 is fixedly connected to the center rod 206, and a pipeline 305a is opened in the piston 305, and the pipeline 305a is connected to the sliding cavity 304. A ball blocking 306 and a third spring 307 are provided in the pipeline 305a. A ball blocking 306 is provided at the pipe opening of the pipeline 305a. The diameter of the ball blocking 306 is larger than the diameter of the pipe opening of the pipeline 305a. One end of the third spring 307 is fixedly connected to the ball blocking 306, and the other end is fixedly connected to the inner wall of the mounting seat 301. The water outlet pipe 303 is connected to the sliding cavity 304, and the third spring 307 is in a compressed state in a static state. Four hoses 308 are provided, one end of the hose 308 is connected to the water outlet pipe 303, and the other end has two branches, which are respectively connected to the two slide cylinders 203.
[0037] It is not difficult to see in the above-mentioned noise reduction component 200 that the vibration force of the transmission plate 101 is distributed to the support rod 204 and the first spring 205. The support rod 204 will frequently rub against the slide cylinder 203. This type of structure can easily cause rigid friction between the support rod 204 and the slide cylinder 203 after long-term use, which will have side effects on noise reduction.
[0038] Operation process: a mounting seat 301 is provided on the other side of the fixed plate 201. When the center rod 206 fluctuates and vibrates, the piston 305 is driven to move back and forth in the sliding cavity 304. When the piston 305 is pushed into the sliding cavity 304, the lubricant in the sliding cavity 304 is pushed into the water inlet pipe 302, and the blocking ball 306 at the water inlet pipe 302 is squeezed by the lubricant in the sliding cavity 304 and pressed against the pipe mouth at the water inlet pipe 302. When the piston 305 continues to be pushed into the sliding cavity 304, the lubricant will flush the blocking ball 306 in the pipeline 305a and enter the sliding cavity 304 through the pipeline 305a. The lubricant in the sliding cavity 304 increases and is then discharged to the water outlet pipe 303. When the piston 305 is pulled out of the sliding cavity 304, the space between the piston 305 and the sliding cavity 304 becomes larger, and the external lubricant will rush in due to the pressure difference, and the blocking ball 306 in the pipeline 305a will be The lubricant 306 at the water inlet pipe 302 will flow in and be squeezed open, thereby performing a similar pumping operation on the oil tank. Through the above steps, the cyclic sliding of the piston 305 can continuously extract lubricating oil from the oil tank and discharge the lubricating oil through the water outlet pipe 303. The water outlet pipe 303 is connected to the hose 308. The lubricating oil enters the slide cylinder 203 through the hose 308 to compensate for the lubrication. It should be noted that the slide cylinder 203 is not a sealed structure, and the hose 308 will not be unable to introduce lubricant due to the influence of air pressure. The vibration fluctuation of the center rod 206 can drive the piston 305 to move. The greater the vibration fluctuation of the center rod 206, the faster the lubrication compensation in the slide cylinder 203. This can protect the connection between the support rod 204 and the slide cylinder 203 and extend the service life.
[0039] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.
[0040] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.
[0041] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.
[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A modular floor scrubber silent system, characterized by: include, The housing assembly (100) comprises a transmission plate (101), a water suction motor (102) arranged on the transmission plate (101), an upper soundproof cover (103) and a lower soundproof cover (104) sleeved on the outside of the water suction motor (102), a mounting sheet metal (105) connected to the lower soundproof cover (104), and a silencer pipe (106) arranged on the lower soundproof cover (104); A noise reduction assembly (200) comprises a fixing plate (201), a pillar (202) arranged on the fixing plate (201), a slide cylinder (203) hinged to the pillar (202), a support rod (204) slidably connected to the slide cylinder (203), a first spring (205) sleeved outside the support rod (204), a center rod (206) hinged to the support rod (204), and a second spring (207) sleeved outside the center rod (206); and, A lubrication assembly (300), wherein the lubrication assembly (300) is arranged on the fixing plate (201).
2. The modular floor scrubber silent system according to claim 1, characterized in that: The water suction motor (102) is fixedly connected to an upper silent cover (103) and a lower silent cover (104); a heat insulation pad (103a) is also provided on the upper silent cover (103); the inner walls of the upper silent cover (103) and the lower silent cover (104) are both provided with silent cotton (107); the mounting sheet metal (105) is fixedly arranged at the bottom of the lower silent cover (104); a heat dissipation cover (104a) is also provided at the bottom of the lower silent cover (104); the inner wall of the heat dissipation cover (104a) is provided with sealing cotton (104c); the silencer pipe (106) is connected to the water suction motor (102); and a sealing pad (104b) is provided between the upper silent cover (103) and the lower silent cover (104).
3. The modular floor scrubber silent system according to claim 2, characterized in that: Four pillars (202) are provided, and the pillars (202) are arranged at the four corners of a square. Each pillar (202) is hinged to two slide cylinders (203), and the two slide cylinders (203) are perpendicular to each other. One end of the support rod (204) is sleeved in the slide cylinder (203), and the other end is hinged to the center rod (206).
4. The modular floor scrubber silent system according to claim 3, characterized in that: The first spring (205) is arranged in the slide tube (203), one end of the first spring (205) is fixedly connected to the end of the support rod (204), and the other end is fixedly connected to the end of the slide tube (203) close to the center rod (206), the center rod (206) is arranged in the center between the two pillars (202), four center rods (206) are arranged, and both sides of the center rod (206) are respectively hinged to a support rod (204), and the center rod (206) is slidably connected to the fixed plate (201).
5. The modular floor scrubber silent system according to claim 4, characterized in that: The top of the center rod (206) is fixedly connected to the transmission plate (101); one end of the second spring (207) is fixedly connected to the center rod (206), and the other end is fixedly connected to the fixed plate (201).
6. The modular floor scrubber silent system according to claim 1, characterized in that: The lubrication assembly (300) comprises a mounting seat (301), a water inlet pipe (302) arranged on the mounting seat (301), a water outlet pipe (303) and a sliding chamber (304), a piston (305) slidably arranged in the sliding chamber (304), a blocking ball (306) and a third spring (307) arranged in the piston (305) and the water inlet pipe (302), and a hose (308) connecting the water outlet pipe (303) and the slide cylinder (203).
7. The modular floor scrubber silent system according to claim 6, characterized in that: The mounting seat (301) is arranged on the other side of the fixing plate (201) relative to the support (202); the water inlet pipe (302) is connected to the oil tank; the blocking ball (306) is arranged at the pipe mouth of the water inlet pipe (302); the diameter of the blocking ball (306) is larger than the diameter of the pipe mouth of the water inlet pipe (302); the third spring (307) is also arranged under the blocking ball (306); one end of the third spring (307) is fixedly connected to the blocking ball (306), and the other end is fixedly connected to the inner wall of the mounting seat (301).
8. The modular floor scrubber silent system according to claim 7, characterized in that: The water inlet pipe (302) is connected to the sliding chamber (304), the piston (305) is slidably connected to the sliding chamber (304), the end of the piston (305) outside the mounting seat (301) is fixedly connected to the center rod (206), and a pipeline (305a) is opened in the piston (305), and the pipeline (305a) is connected to the sliding chamber (304).
9. The modular floor scrubber silent system according to claim 8, characterized in that: The blocking ball (306) and the third spring (307) are arranged in the pipeline (305a); the blocking ball (306) is arranged at the pipe mouth of the pipeline (305a); the diameter of the blocking ball (306) is larger than the diameter of the pipe mouth of the pipeline (305a); one end of the third spring (307) is fixedly connected to the blocking ball (306), and the other end is fixedly connected to the inner wall of the mounting seat (301).
10. The modular floor scrubber silent system according to claim 6, characterized in that: The water outlet pipe (303) is connected to the sliding cavity (304), and the third spring (307) is in a compressed state in a static state; four hoses (308) are provided, one end of the hose (308) is connected to the water outlet pipe (303), and the other end has two branches, which are respectively connected to the two slide cylinders (203).
Citation Information
Patent Citations
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CN208337321U