Ultrasonic cleaning device

Abstract

The present invention discloses an ultrasonic cleaning device, comprising a frame, a conveying mechanism, a first spraying mechanism, an ultrasonic cleaning mechanism, a second spraying mechanism, an air blowing mechanism, and a drying mechanism arranged in sequence along a feeding direction; the conveying mechanism comprises a driving wheel, a driven wheel, a conveyor belt, and a supporting member; the ultrasonic cleaning mechanism comprises a cleaning tank, and the conveying mechanism further comprises at least one sprocket assembly, the sprocket assembly comprising a descending sprocket, a first conveying sprocket, a second conveying sprocket, and an ascending sprocket arranged in sequence along the feeding direction; the descending sprocket and the first conveying sprocket are used to cooperate with each other to drive the items to be washed downward; the second conveying sprocket and the ascending sprocket are used to cooperate with each other to drive the items to be washed upward; the conveying mechanism further comprises at least one first limiting assembly, the first limiting assembly comprising a first limiting bar for always pressing against the bottom end of the items to be washed as they pass through the sprocket assembly. The ultrasonic cleaning device of the present invention has high conveying and cleaning efficiency.

Description

Technical Field

[0001] The invention relates to an ultrasonic cleaning device. Background Art

[0002] Ultrasonic cleaning refers to the use of ultrasonic cavitation, acceleration and straight flow in liquid to directly and indirectly affect the liquid and dirt, so that the dirt layer is dispersed, emulsified and peeled off to achieve the cleaning purpose.

[0003] When ultrasonic cleaning is performed on an open-end box, it is typically placed in a frame, which is then placed in a cleaning tank equipped with an ultrasonic vibration device. In this system, each time the frame is removed from the box, it needs to be shaken to remove any remaining water. This not only easily damages the box, but also results in relatively low cleaning efficiency. Summary of the Invention

[0004] The object of the present invention is to provide an ultrasonic cleaning device with high transmission and cleaning efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An ultrasonic cleaning device comprises a frame, a conveying mechanism provided on the frame and used to convey items to be cleaned along a feeding direction, a first spraying mechanism, an ultrasonic cleaning mechanism, a second spraying mechanism, a blowing mechanism, and a drying mechanism, which are arranged in sequence on the frame along the feeding direction;

[0007] The conveying mechanism includes a driving wheel and a driven wheel respectively rotatable around their own axis on the frame, a conveyor belt tensioned on the outside of the driving wheel and the driven wheel, and a support member provided on the outside of the conveyor belt and used to be inverted by the items to be washed;

[0008] The ultrasonic cleaning mechanism includes a cleaning tank, and the conveying mechanism also includes at least one set of sprocket assemblies provided on the frame and used to cooperate with the conveyor belt to tension the conveyor belt, the sprocket assembly including a descending sprocket, a first conveying sprocket, a second conveying sprocket and an ascending sprocket, which are sequentially arranged along the feeding direction and can rotate around their own axis directions respectively;

[0009] The rotation center of the descending sprocket is higher than the rotation center of the first conveying sprocket, and the two are used to cooperate with each other to drive the items to be washed to descend and enter the cleaning tank; the rotation center of the second conveying sprocket is lower than the rotation center of the ascending sprocket, and the two are used to cooperate with each other to drive the items to be washed to ascend and leave the cleaning tank;

[0010] The conveying mechanism also includes at least one set of first limiting components arranged on the frame and corresponding one-to-one with the sprocket assembly, the first limiting component includes a first limiting bar used to always press against the bottom end of the to-be-washed item when the to-be-washed item passes through the sprocket assembly, the first limiting bar includes a first straight line segment, a first arc segment, a second straight line segment, a second arc segment and a third straight line segment connected in sequence.

[0011] Preferably, the conveying mechanism also includes a second limiting assembly provided on the frame, and the second limiting assembly includes a second limiting strip for always pressing against the bottom end of the item to be washed when the item to be washed passes through the first spraying mechanism, the second spraying mechanism, the hair blowing mechanism and the drying mechanism.

[0012] More preferably, the second limiting strip is parallel to the feeding direction.

[0013] Preferably, the descending sprocket and the first conveying sprocket are used to cooperate with each other to tighten the conveyor belt therebetween in the vertical direction to drive the items to be washed to descend along a vertical path; the second conveying sprocket and the ascending sprocket are used to cooperate with each other to tighten the conveyor belt therebetween in the vertical direction to drive the items to be washed to ascend along a vertical direction.

[0014] Preferably, the descending sprocket and the ascending sprocket have the same shape and are arranged at the same height, and the first conveying sprocket and the second conveying sprocket have the same shape and are arranged at the same height.

[0015] Preferably, the frame is further provided with at least one set of fixed shaft assemblies, the fixed shaft assembly comprising a first shaft connected to the frame and arranged coaxially with the first transmission sprocket, and a second shaft connected to the frame and arranged coaxially with the second transmission sprocket;

[0016] The first limiting assembly also includes a first pressure wheel fixedly sleeved on the first shaft and used to press against the first arc segment, and a second pressure wheel fixedly sleeved on the second shaft and used to press against the second arc segment.

[0017] More preferably, in each group of the sprocket assemblies, there are two of the descending sprocket, the first conveying sprocket, the second conveying sprocket and the ascending sprocket respectively along the vertical feeding direction, the first shaft and the first pressure wheel are arranged between the two first conveying sprockets, and the second shaft and the second pressure wheel are arranged between the two second conveying sprockets.

[0018] More preferably, the first limiting assembly further includes two groups of connecting pieces provided on the frame and used to respectively connect two ends of the first limiting bar.

[0019] More preferably, the connecting member includes a mounting beam spanning above the conveyor belt, two groups of connecting longitudinal beams respectively connected between the two ends of the mounting beam and the frame, and the mounting beam is provided with a mounting hole for the end of the first limiting strip to pass through.

[0020] More preferably, the first limiting strip is an elastic rope tensioned between the first group of connecting members, the first pressing wheel, the second pressing wheel and the second group of connecting members.

[0021] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the ultrasonic cleaning device of the present invention can realize the continuous transmission and cleaning of the workpieces to be washed. Since the workpieces to be washed are inverted on the conveyor belt, it can not only prevent the water sprayed by the first spray mechanism from being brought into the cleaning tank, but also prevent the cleaning liquid from remaining in the workpieces to be washed after the ultrasonic cleaning is completed; by arranging the sprocket assembly, the cleaning liquid is filled into the interior of the workpieces to be washed during the descent process, ensuring that the overall ultrasonic cleaning of the workpieces to be washed is thorough; by arranging the first limit assembly, it can ensure that the workpieces to be washed are always located on the conveyor belt during the downward and upward transmission process, avoiding separation from the conveyor belt, ensuring continuous transmission and cleaning, and relatively high transmission and cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attachment Figure 1 A schematic structural diagram of an ultrasonic cleaning device according to a specific embodiment of the present invention;

[0023] Attachment Figure 2 Schematic diagram of the transmission structure of the conveyor belt;

[0024] Attachment Figure 3 Schematic diagram of the connection structure of the first transmission sprocket, the first shaft and the first pressure wheel;

[0025] Attachment Figure 4 is a structural diagram of the connecting piece;

[0026] Attachment Figure 5 Schematic diagram of the connection principle of the first limit bar.

[0027] Wherein: 1. frame; 2. parts to be washed; 3. first spray mechanism; 4. ultrasonic cleaning mechanism; 5. second spray mechanism; 6. blower mechanism; 7. drying mechanism; 8. driving wheel; 9. driven wheel; 10. conveyor belt; 11. support member; 12. descending sprocket; 13. first transmission sprocket; 14. second transmission sprocket; 15. ascending sprocket; 16. first limiting assembly; 161. first limiting strip; 1611. first straight segment; 1612. first arc segment; 1613. second straight segment; 1614. second arc segment; 1615. third straight segment; 162. connecting member; 1621. mounting crossbeam; 1622. connecting longitudinal beam; 1623. mounting hole; 17. first shaft; 18. first pressure wheel; 181. first annular groove. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below in conjunction with specific embodiments and drawings.

[0029] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inside", etc. indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0035] See also Figure 1 As shown, this embodiment provides an ultrasonic cleaning device, including a frame 1, a device provided on the frame 1 and configured to move the ultrasonic cleaning device along a feeding direction (i.e. Figure 1 A conveying mechanism for conveying the items to be washed 2 (in the direction of the arrow in the figure), a first spraying mechanism 3, an ultrasonic cleaning mechanism 4, a second spraying mechanism 5, a blower mechanism 6 and a drying mechanism 7 are arranged on the frame 1 in sequence along the feeding direction.

[0036] The first spray mechanism 3 and the second spray mechanism 5 are respectively used to spray the items to be washed 2, and both include a spray head and a liquid collection tank respectively; the ultrasonic cleaning mechanism 4 includes a cleaning tank equipped with an ultrasonic vibration device; the blowing mechanism 6 includes a blowing air knife and a driving motor for blowing cold air to the items to be washed 2; the drying mechanism 7 includes an air heating pipe and a centrifugal fan for blowing hot air to the items to be washed 2.

[0037] See also Figure 2 As shown, the conveying mechanism comprises a driving wheel 8 and a driven wheel 9, each rotatably mounted on a frame 1 about its own axis; a conveyor belt 10 tensioned around the driving wheel 8 and the driven wheel 9; and a support member 11, mounted outside the conveyor belt 10 and adapted to be held upside down by the items 2 to be washed. The driving wheel 8 is located at the upper left, driven by a drive motor; the driven wheels 9 are located at the lower left, upper right, and lower right, respectively.

[0038] In this embodiment, the support members 11 are vertically mounted on the conveyor belt 10 , and the support members 11 are arranged in groups of two and spaced apart along the vertical feeding direction, so that the items to be washed 2 inverted on the support members 11 can be neatly arranged on the conveyor belt 10 .

[0039] See also Figure 2 As shown, the conveying mechanism also includes at least one group of sprocket assemblies arranged on the frame 1 and used to cooperate with the tensioning of the conveyor belt 10. The sprocket assembly includes a descending sprocket 12, a first conveying sprocket 13, a second conveying sprocket 14 and an ascending sprocket 15 which are arranged in sequence along the feeding direction and can rotate around their own axial centerline directions.

[0040] Among them, the rotation center of the descending sprocket 12 is at the same height as the rotation center of the driving wheel 8, and is higher than the rotation center of the first conveying sprocket 13. The descending sprocket 12 and the first conveying sprocket 13 are used to cooperate with each other to drive the items to be washed 2 to descend and enter the ultrasonic cleaning mechanism 4 from the first spray mechanism 3 (that is, enter the cleaning tank); the rotation center of the second conveying sprocket 14 is lower than the rotation center of the ascending sprocket 15, and the rotation center of the ascending sprocket 15 is at the same height as the rotation center of the upper right driven wheel 9. The second conveying sprocket 14 and the ascending sprocket 15 are used to cooperate with each other to drive the items to be washed 2 to rise and enter the second spray mechanism 5 from the ultrasonic cleaning mechanism 4 (that is, leave the cleaning tank).

[0041] In this embodiment, there are three groups of sprocket assemblies, which are arranged in the cleaning tank at intervals along the feeding direction.

[0042] The conveying mechanism further includes at least one set of first limiting assemblies 16 disposed on the frame 1 and corresponding one-to-one with the sprocket assemblies. In this embodiment, there are three sets of first limiting assemblies 16. Each set of first limiting assemblies 16 includes a first limiting bar 161 for always abutting the bottom end of the items 2 to be washed as they pass through the sprocket assembly. The first limiting bar 161 includes a first straight segment 1611, a first arc segment 1612, a second straight segment 1613, a second arc segment 1614, and a third straight segment 1615, which are connected in sequence. In other words, the orientation of the first limiting bar 161 is consistent with the orientation of the items 2 to be washed in the ultrasonic cleaning mechanism 4.

[0043] The first straight segment 1611 is used to limit the position of the items 2 being transferred from the descending sprocket 12 to the first transfer sprocket 13. At this time, the items 2 are rotated from a vertical orientation to a horizontal orientation and kept moving downward in the horizontal orientation.

[0044] The first arc segment 1612 is used to limit the position of the items to be washed 2 that rotate and descend around the first conveying sprocket 13. The first arc segment 1612 is a quarter-circle arc. At this time, the items to be washed 2 rotate from a horizontal orientation to a vertical orientation.

[0045] The second straight segment 1613 is used to limit the position of the items 2 to be washed that are being transferred from the first transfer sprocket 13 to the second transfer sprocket 14. At this time, the items 2 to be washed remain in a vertical orientation and move linearly.

[0046] The second arc segment 1614 is used to limit the position of the items to be washed 2 that are rotating and rising around the second conveying sprocket 14. The second arc segment 1614 is a quarter-circle arc. At this time, the items to be washed 2 rotate from a vertical orientation to a horizontal orientation.

[0047] The third straight segment 1615 is used to limit the items to be washed 2 being conveyed from the second conveying sprocket 14 to the ascending sprocket 15. At this time, the items to be washed 2 maintain a horizontal upward movement and finally rotate from a horizontal orientation to a vertical orientation.

[0048] See also Figure 2 As shown, in this embodiment, the descending sprocket 12 and the ascending sprocket 15 have the same shape and are arranged at the same height, the first conveying sprocket 13 and the second conveying sprocket 14 have the same shape and are arranged at the same height, the diameter of the first conveying sprocket 13 is larger than the diameter of the descending sprocket 12, and the second straight segment 1613 is parallel to the horizontal direction.

[0049] See also Figure 5 As shown, the descending sprocket 12 and the first conveying sprocket 13 are used to cooperate with each other to tighten the conveyor belt 10 therebetween in the vertical direction to drive the items to be washed 2 to descend along the vertical path, that is, the first straight segment 1611 is parallel to the vertical direction; the second conveying sprocket 14 and the ascending sprocket 15 are used to cooperate with each other to tighten the conveyor belt 10 therebetween in the vertical direction to drive the items to be washed 2 to ascend along the vertical direction, that is, the third straight segment 1615 is parallel to the vertical direction.

[0050] Through this arrangement, the items to be washed 2 can lie flat quickly when descending to ensure that the interior thereof is quickly filled with cleaning liquid, and prevent an air layer from forming on the top of the items to be washed 2 after it is rotated to a vertical position, thereby affecting the ultrasonic cleaning effect; when ascending, the items to be washed 2 can be quickly uprighted to ensure that the cleaning liquid inside is quickly poured into the cleaning tank, avoiding waste caused by carrying out the cleaning liquid.

[0051] The frame 1 is also provided with at least one set of fixed shaft assemblies, which include a first shaft 17 connected to the frame 1 and coaxially arranged with the first transmission sprocket 13, and a second shaft connected to the frame 1 and coaxially arranged with the second transmission sprocket 14. The first transmission sprocket 13 is rotatably mounted on the first shaft 17 about its own axis, and the second transmission sprocket 14 is rotatably mounted on the second shaft about its own axis.

[0052] The first limiting assembly 16 further includes a first pressure wheel 18 fixedly sleeved on the first shaft 17 and used to press against the first arc segment 1612 , and a second pressure wheel fixedly sleeved on the second shaft and used to press against the second arc segment 1614 .

[0053] In each sprocket assembly, two descending sprockets 12, two first conveying sprockets 13, two second conveying sprockets 14, and two ascending sprockets 15 are respectively provided in the vertical feeding direction. The first shaft 17 and the first pressure wheel 18 are provided between the two first conveying sprockets 13, and the second shaft and the second pressure wheel are provided between the two second conveying sprockets 14.

[0054] See also Figure 3 As shown, taking the first conveyor sprocket 13 as an example, four sets of first pressure rollers 18 are provided between two first conveyor sprockets 13, with each set of two first pressure rollers 18 having a smaller diameter than the first conveyor sprocket 13. Each set of first pressure rollers 18 is used to limit the position of a wash item 2 to improve the stability of the conveyance of the wash items 2. A first annular groove 181 is provided on the surface of the first pressure roller 18, which is used to mount the first limiting bar 161.

[0055] The first limiting assembly 16 further includes two sets of connecting members 162 disposed on the frame 1 and used to connect the two ends of the first limiting bar 161 respectively.

[0056] See also Figure 4 As shown, the connecting member 162 includes a mounting beam 1621 spanning above the conveyor belt 10, two groups of connecting longitudinal beams 1622 respectively connected between the two ends of the mounting beam 1621 and the frame 1, and a mounting hole 1623 for the end of the first limiting strip 161 to pass through is provided on the mounting beam 1621, and the end of the limiting strip can be fixed through the mounting beam 1621.

[0057] In this embodiment, the first limiting strip 161 is an elastic rope tensioned between the first set of connecting members 162 , the first pressing wheel 18 , the second pressing wheel, and the second set of connecting members 162 .

[0058] See also Figure 5 As shown, the first group of connecting members 162 on the left side is located directly above the first conveying sprocket 13 , and the second group of connecting members 162 on the right side is located directly above the second conveying sprocket 14 .

[0059] The conveyor mechanism further includes a second limiting assembly mounted on the frame 1. The second limiting assembly comprises a second limiting bar configured to maintain contact with the bottom end of the items 2 as they pass through the first spray mechanism 3, the second spray mechanism 5, the blower mechanism 6, and the drying mechanism 7. In this embodiment, the second limiting bar is parallel to the feed direction; there are two second limiting bars arranged perpendicular to the feed direction to enhance the stability of the conveyance of the items 2.

[0060] The working process of this embodiment is described in detail below:

[0061] (1) The first robotic arm places the item 2 to be washed upside down on the support 11 at the left end of the conveyor belt 10, and the item 2 to be washed is conveyed by the conveyor belt 10;

[0062] (2) The conveyor belt 10 first delivers the vertically oriented items to be washed 2 into the first spray mechanism 3 for spraying;

[0063] (3) Then, the items to be washed 2 are rotated to a horizontal orientation by the descending sprocket 12, and the items to be washed 2 are conveyed downward to the cleaning tank in cooperation with the first conveying sprocket 13. At this time, the cleaning liquid is poured into the interior of the items to be washed 2; then, the items to be washed 2 are rotated to a vertical orientation by the first conveying sprocket 13; the conveyor belt 10 conveys the items to be washed 2 to the second conveying sprocket 14, and the items to be washed 2 are rotated to a horizontal orientation by the second conveying sprocket 14; the second conveying sprocket 14 cooperates with the ascending sprocket 15 to convey the items to be washed 2 upward. At this time, the cleaning liquid inside the items to be washed 2 is poured out; the ascending sprocket 15 rotates the items to be washed 2 to a vertical orientation;

[0064] (4) The conveyor belt 10 then delivers the vertically oriented items to be washed 2 into the second spray mechanism 5 for spraying;

[0065] (5) The conveyor belt 10 then delivers the vertically positioned items 2 to the blower mechanism 6 for air blowing;

[0066] (6) The conveyor belt 10 then delivers the vertically oriented items to be washed 2 to the drying mechanism 7 for drying;

[0067] (7) Finally, the conveyor belt 10 transmits the washed items 2 to its right end, and the second robotic arm removes the washed items 2 from the support 11 at the right end of the conveyor belt 10.

[0068] In step (2), the first limiting strip 161 is always pressed against the bottom end of the item to be washed 2 to limit the position of the item to be washed 2, thereby preventing relative displacement between the item to be washed 2 and the conveyor belt 10. In the remaining steps, the second limiting strip is always pressed against the bottom end of the item to be washed 2 to limit the position of the item to be washed 2, thereby preventing relative displacement between the item to be washed 2 and the conveyor belt 10.

[0069] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultrasonic cleaning device, characterized in that: The machine comprises a frame, a conveying mechanism provided on the frame and used for conveying the items to be washed along a feeding direction, a first spraying mechanism, an ultrasonic cleaning mechanism, a second spraying mechanism, a blowing mechanism and a drying mechanism arranged in sequence on the frame along the feeding direction; The conveying mechanism includes a driving wheel and a driven wheel respectively rotatable around their own axis on the frame, a conveyor belt tensioned on the outside of the driving wheel and the driven wheel, and a support member provided on the outside of the conveyor belt and used to be inverted by the items to be washed; The ultrasonic cleaning mechanism includes a cleaning tank, and the conveying mechanism also includes at least one set of sprocket assemblies provided on the frame and used to cooperate with the conveyor belt to tension the conveyor belt, the sprocket assembly including a descending sprocket, a first conveying sprocket, a second conveying sprocket and an ascending sprocket, which are sequentially arranged along the feeding direction and can rotate around their own axis directions respectively; The rotation center of the descending sprocket is higher than the rotation center of the first conveying sprocket, and the two are used to cooperate with each other to drive the items to be washed to descend and enter the cleaning tank; the rotation center of the second conveying sprocket is lower than the rotation center of the ascending sprocket, and the two are used to cooperate with each other to drive the items to be washed to ascend and leave the cleaning tank; The conveying mechanism also includes at least one set of first limiting components arranged on the frame and corresponding one-to-one with the sprocket assembly, the first limiting component includes a first limiting bar used to always press against the bottom end of the to-be-washed item when the to-be-washed item passes through the sprocket assembly, the first limiting bar includes a first straight line segment, a first arc segment, a second straight line segment, a second arc segment and a third straight line segment connected in sequence.

2. The ultrasonic cleaning device according to claim 1, wherein: The conveying mechanism also includes a second limiting assembly provided on the frame, and the second limiting assembly includes a second limiting strip for always pressing against the bottom end of the wash item when the wash item passes through the first spraying mechanism, the second spraying mechanism, the hair blowing mechanism and the drying mechanism.

3. The ultrasonic cleaning device according to claim 2, wherein: The second limiting strip is parallel to the feeding direction.

4. The ultrasonic cleaning device according to claim 1, wherein: The descending sprocket and the first conveying sprocket are used to cooperate with each other to tighten the conveyor belt between them in the vertical direction to drive the items to be washed to descend along a vertical path; the second conveying sprocket and the ascending sprocket are used to cooperate with each other to tighten the conveyor belt between them in the vertical direction to drive the items to be washed to ascend in the vertical direction.

5. The ultrasonic cleaning device according to claim 1, wherein: The descending sprocket and the ascending sprocket have the same shape and are arranged at the same height, and the first conveying sprocket and the second conveying sprocket have the same shape and are arranged at the same height.

6. The ultrasonic cleaning device according to claim 1, wherein: The frame is further provided with at least one set of fixed shaft assemblies, the fixed shaft assembly including a first shaft connected to the frame and arranged coaxially with the first transmission sprocket, and a second shaft connected to the frame and arranged coaxially with the second transmission sprocket; The first limiting assembly also includes a first pressure wheel fixedly sleeved on the first shaft and used to press against the first arc segment, and a second pressure wheel fixedly sleeved on the second shaft and used to press against the second arc segment.

7. The ultrasonic cleaning device according to claim 6, characterized in that: In each group of the sprocket assemblies, there are two descending sprockets, two first conveying sprockets, two second conveying sprockets and two ascending sprockets respectively along the vertical feeding direction, the first shaft and the first pressure wheel are arranged between the two first conveying sprockets, and the second shaft and the second pressure wheel are arranged between the two second conveying sprockets.

8. The ultrasonic cleaning device according to claim 6, characterized in that: The first limiting assembly further includes two groups of connecting pieces which are arranged on the frame and are used to respectively connect the two ends of the first limiting bar.

9. The ultrasonic cleaning device according to claim 8, characterized in that: The connecting member includes a mounting beam spanning above the conveyor belt, and two groups of connecting longitudinal beams respectively connected between the two ends of the mounting beam and the frame. The mounting beam is provided with a mounting hole for the end of the first limiting strip to penetrate.

10. The ultrasonic cleaning device according to claim 8, characterized in that: The first limiting strip is an elastic rope tensioned between the first group of connecting members, the first pressing wheel, the second pressing wheel, and the second group of connecting members.

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