Cleaning jig for speed reducer shell

Abstract

The utility model discloses a cleaning jig for a speed reducer shell, which comprises a frame body which is a cubic frame internally provided with a cavity capable of accommodating at least one speed reducer shell; the positioning structure is arranged on the bottom surface of the frame body and protrudes upwards so as to support and position one surface of the speed reducer shell to be cleaned; the top cover plate is detachably arranged on the top surface of the frame body in a covering manner; the profiling structure is arranged on the inner end face of the top cover plate and matched with the other face of the speed reducer shell in shape so as to be used for positioning the face, provided with the protruding part, of the speed reducer shell. The two opposite faces of the speed reducer shell are accurately positioned and fixed through the multiple positioning structures and the multiple profiling structures, so that the speed reducer shell is firmly fixed in the frame body, the situation that the speed reducer shell is not clamped in place is effectively prevented, and the problems that the speed reducer shell shakes and falls off and is damaged in the overturning process can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning jig processing, in particular to a cleaning jig for a reducer housing. Background Art

[0002] The company currently uses continuous batch ultrasonic cleaning technology and equipment to meet the surface cleanliness requirements of the reducer housing. During the cleaning process, the workpiece (reducer housing) needs to be turned over continuously to meet the needs of fast clamping of the workpiece, improve production efficiency, and avoid shaking and falling off of the workpiece due to turning during the cleaning process. At present, the company does not have a fixture specifically used for ultrasonic cleaning of the reducer housing. Therefore, it is necessary to design an ultrasonic cleaning fixture for the reducer housing. This utility model is derived from this. Utility Model Content

[0003] In view of at least one of the above-mentioned technical problems, the utility model aims to provide a cleaning jig for a reducer housing.

[0004] The technical solution of the utility model is:

[0005] The purpose of the utility model is to provide a cleaning tool for a reducer housing, comprising:

[0006] The frame body is a cubic frame having a cavity inside which can accommodate at least one reducer housing;

[0007] A positioning structure, which is arranged on the bottom surface of the frame body and protrudes upward to support and position one side of the reducer housing to be cleaned;

[0008] A top cover plate, which is detachably covered on the top surface of the frame body;

[0009] A contoured structure is arranged on the inner end surface of the top cover plate and matches the shape of the other surface of the reducer housing so as to be used for positioning the surface of the reducer housing provided with the raised portion.

[0010] Preferably, the cleaning jig is a multi-layer structure stacked up and down, and the upper layers can be taken out separately, and at least one reducer housing can be placed in any layer.

[0011] Preferably, the frame body is implemented as an outer frame, at least one inner frame is stacked vertically in the cavity in the outer frame and all the inner frames can be taken out separately, at least one inner frame divides the cavity of the outer frame into at least two placement spaces stacked up and down, any of the inner frames is formed with a placement space that can accommodate at least one reducer housing and the top surface of any of the inner frames is completely hollowed out, the bottom surface of the outer frame is implemented as the bottom surface of the placement space at the bottom layer and in any two adjacent inner frames, the bottom surface of the upper inner frame is implemented as the cover plate of the lower inner frame, and the top cover plate is implemented as the cover plate of the placement space at the top layer;

[0012] The bottom surface of the outer frame and the upper end surface of the bottom surface of any inner frame are both provided with the positioning structure, and the lower end surface of the bottom surface of any inner frame is provided with the profiling structure.

[0013] Preferably, at least one transversely arranged and removable partition is vertically spaced in the frame body to divide the cavity in the frame body into at least two placement spaces stacked up and down;

[0014] Any of the partitions serves as a cover for the lower placement space therebelow, and the bottom surface of the frame body and the upper surface of any of the partitions are provided with the positioning structure protruding and extending upward, and the lower surface of any of the partitions is provided with the contouring structure protruding and extending downward.

[0015] Preferably, the positioning structure comprises three upwardly protruding positioning blocks arranged in a triangular shape along the circumferential direction, the upper surface of any one of the positioning blocks is implemented as a positioning surface, and positioning pins protruding and extending upward are formed on the positioning surfaces of some of the positioning blocks.

[0016] Preferably, when the cleaning jig has only one layer, a plurality of hollow portions are provided on the bottom surface of the frame body so that the bottom surface of the frame body forms four edges and at least two longitudinal edges or transverse edges and at least two oblique edges located in the middle area of ​​the edges; when the cleaning jig is a multi-layer stacked structure, the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions all have a plurality of hollow portions so that the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions all form four edges and at least two longitudinal edges or transverse edges and at least two oblique edges located in the middle area of ​​the edges;

[0017] Two of the three positioning structures are arranged on two adjacent edges, and one is arranged on the oblique edge.

[0018] Preferably, when the cleaning jig has only one layer, a plurality of hollow portions are provided on the bottom surface of the frame body so that the bottom surface of the frame body is formed with four edges and at least two transverse edges, at least one longitudinal edge or at least two longitudinal edges, at least one transverse edge and at least two oblique edges located in the middle area of ​​the edges; when the cleaning jig is a multi-layer stacked structure, the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions have a plurality of hollow portions so that the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions are formed with four edges and at least two transverse edges, at least one longitudinal edge or at least two longitudinal edges, at least one transverse edge and at least two oblique edges located in the middle area of ​​the edges;

[0019] One of the three positioning structures is arranged on one of the side edges, one is arranged on the longitudinal edge or the transverse edge, and another is arranged on the oblique edge.

[0020] Preferably, any reducer housing to be cleaned corresponds to two contour structures of different sizes, and any of the contour structures is implemented as a cylindrical structure having an inner hollow cavity for the raised portion on the reducer housing to be snap-fitted and fixed and protruding and extending downward.

[0021] Preferably, the top cover plate includes a quadrilateral frame with a hollow middle and a plurality of plates arranged in a vertical and horizontal cross pattern at the hollow middle of the frame, and any of the contoured structures is arranged at the intersection of the horizontal plate and the longitudinal plate.

[0022] Preferably, it also includes a guide structure consisting of a plurality of guide rods which are arranged at intervals around the periphery of the positioning structure, protrude and extend upward, and are located outside the reducer housing.

[0023] Compared with the prior art, the advantages of the utility model are:

[0024] The utility model discloses a cleaning jig for a reducer housing, which accurately positions and fixes two opposite surfaces of the reducer housing through multiple positioning structures and contour structures, so that the reducer housing is firmly fixed in the frame body, effectively preventing the reducer housing from being improperly clamped, and effectively solving the problem of the reducer housing shaking and falling off and being damaged during the flipping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the structure of the cleaning jig for the reducer housing according to the embodiment of the utility model, in which the top cover plate is omitted;

[0027] Figure 2for Figure 1 A partial enlarged view of the middle A part;

[0028] Figure 3 This is a schematic structural diagram of a top cover plate of a cleaning jig for a reducer housing according to an embodiment of the utility model;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-section structure after the top cover plate and reducer housing are clamped.

[0030] Wherein: 10, outer frame; 20, positioning structure; 21, first positioning structure; 210, first positioning block; 211, first positioning surface; 212, first positioning pin; 22, second positioning structure; 220, second positioning block; 221, second positioning surface; 222, second positioning pin; 23, third positioning structure; 230, third positioning block; 231, third positioning surface; 30, top cover plate; 31, frame body; 32, transverse plate body; 33, longitudinal plate body; 40, contour structure; 50, inner frame; 51, edge; 52, transverse edge; 53, longitudinal edge; 54, oblique edge; 60, guide structure; 61, guide rod; 70, reducer housing; 71, first protruding portion; 72, second protruding portion. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0032] A cleaning tool for a reducer housing according to an embodiment of the utility model, see Figures 1 to 4 , including a frame body, a positioning structure 20, a top cover plate 30, a contour structure 40 and a guide structure 60. The frame body is a cubic shape ( Figure 1The outer surfaces of the reducer housing 70 (exemplified as a rectangular parallelepiped in FIG. 1 ) are all hollowed out. The positioning structure 20 is arranged on the bottom surface of the frame body and protrudes upward to support and position a side of the reducer housing 70 to be cleaned (such as an assembly connection surface, which has a concave hole for connection and can match the positioning structure 20). The top cover plate 30 is detachably covered on the top surface of the frame body. During cleaning, in order to prevent the reducer housing 70 in the frame body from shaking, falling off, and being damaged during the flipping process, the top cover plate 30 is used to cover and press the reducer housing 70 into the frame body and is firmly positioned and fixed by the positioning structure 20. In the process of clamping or removing after cleaning, it is only necessary to open the top cover plate 30. There is no special limitation or description on the detachable connection method between the top cover plate 30 and the frame body. Any detachable connection method that is well known to technicians in this field and easy to implement is acceptable, such as snap connection. The profiling structure 40 is arranged on the inner end surface of the top cover plate 30 and matches the shape of the other side (such as the outside, on which a convex part is provided) of the reducer housing 70 to be used for positioning the convex part on the other side of the reducer housing 70. The two opposite sides of the reducer housing 70 are precisely positioned and fixed by multiple positioning structures 20 and the profiling structure 40, so that the reducer housing 70 is firmly fixed in the frame body, effectively preventing the reducer housing 70 from being clamped in place, and effectively solving the problem of the reducer housing 70 shaking and falling off during the flipping process. The guide structure 60 includes a plurality of guide rods 61 arranged around the periphery of the positioning structure 20 for guiding when the reducer housing 70 is clamped to the positioning structure 20 in the frame body, so as to improve the convenience of installation, that is, the guide structure 60 is located around the outer side of the reducer housing 70 after the reducer housing 70 is clamped in place. As a replaceable embodiment, the guide structure 60 may not be included, and only the frame body, the positioning structure 20, the top cover plate 30 and the profiling structure 40 are included.

[0033] According to some preferred embodiments of the present invention, the cleaning jig is a stacked structure of at least two layers, and the upper layer can be taken out separately. The upper layer here refers to all upper layers except the bottom layer, in order to facilitate the clamping and disassembly of the reducer housing 70 in the lower layer placement space. Exemplarily, the cleaning jig of the present invention is a double-layer stacked structure, and the upper layer can be taken out separately. For this upper and lower layer stacking structure, a preferred embodiment is as follows: Figure 1As shown, at least one small frame body (described as inner frame 50 for the sake of convenience of description and distinction) that is smaller than the outer frame 10 and is hollow inside to form a placement space and has a completely hollow top surface is arranged inside the frame body (for the sake of convenience of description and distinction), and at least one inner frame 50 divides the cavity inside the outer frame 10 into at least two placement spaces stacked up and down, one of which is defined by the bottom surface and side surfaces of the outer frame 10 and the bottom surface of the inner frame 50 thereon, and the remaining placement spaces are the internal cavities of the inner frame 50. The bottom surface of each inner frame 50 serves as the cover plate of the adjacent lower inner frame 50, and the top cover plate 30 serves as the cover plate of the topmost placement space. Figure 1 As shown, for example, the side of each inner frame 50 is two small squares arranged side by side. For the outer frame 10, the front and rear sides are not completely hollowed out, but are provided with vertical rods and / or horizontal rods (not shown). Figure 1 As shown, illustratively, three small squares are formed side by side on the front and rear sides of the outer frame 10. In this way, sufficient space can be provided to clean the reducer housing 70 in the outer frame 10 during the cleaning process, and the effect of preventing the reducer housing 70 from falling off can also be improved. In order to increase the structural strength of the outer frame 10 and further prevent the falling off effect, a pair of opposite sides, that is, the left and right sides shown in Figure 1, are also provided with a cross-shaped, X-shaped or Yao-shaped reinforcing rod (not marked) and a mesh plate (not marked) to increase the structural strength. In an optional embodiment, the multi-layer stacking structure can also be directly arranged in the frame body along the vertical interval horizontally at least one partition (not shown), the partition divides the cavity of the frame body into at least two upper and lower stacked placement spaces, the partition serves as both the cover plate of the lower placement space and the bottom surface of the upper placement space, and the positioning structure 20 of the upper placement space and the contour structure 40 of the lower placement space are arranged on the upper and lower end surfaces of the partition. Preferably, each layer of placement space can accommodate at least two reducer housings 70. Figure 1 In the example, two are used. That is to say, the cleaning jig of the embodiment of the utility model can clean four reducer housings 70 at one time, effectively improving the cleaning efficiency. As an alternative embodiment, the cleaning jig can also be configured to clean other quantities at one time, such as one, two, three, five, six, etc., and the specific design can be selected according to actual needs.

[0034] According to some preferred embodiments of the present utility model, Figure 1 and Figure 2As shown in the figure, a double-layer stacking structure in which an inner frame 50 that can be removed is stacked up and down inside an outer frame 10 is used as an example for explanation. The bottom surface of the outer frame 10 and the bottom surface of the inner frame 50 are not a complete flat surface, but have multiple hollow parts, which are roughly formed to include four edges 51 that enclose a quadrilateral, such as a rectangle, and transverse edges 52, longitudinal edges 53 and oblique edges 54 arranged in the middle area of ​​the quadrilateral enclosed by the edges 51. In a feasible embodiment, each layer of placement space can accommodate two reducer housings 70. At this time, the bottom surface of the outer frame 10 and the bottom surface of the inner frame 50 both include two transverse edges 52 and one longitudinal edge 53. The two transverse edges 52 are arranged in parallel and spaced apart in the transverse direction, and the longitudinal edge 53 is arranged in the longitudinal direction and cross-arranged with the two transverse edges 52 to divide the bottom surface of the outer frame 10 and the bottom surface of the inner frame 50 into two placement areas arranged side by side, each placement area is used to position a reducer housing 70, and each placement area is a small quadrilateral. The longitudinal edge 53 serves as an edge 51 of the small quadrilateral, and one end of the longitudinal edge 53 is connected to one of the edges 51, but the other end is not connected to the other opposite edge 51. An oblique edge 54 is provided at the three corner positions of the small quadrilateral, wherein the end of the longitudinal edge 53 not connected to the edge 51 is connected to one end of one of the oblique edges 54, and the other end of the oblique edge 54 is connected to an edge 51 not connected to the longitudinal edge 53, and the other two oblique edges 54 are respectively connected to three adjacent edges 51. Correspondingly, each placement area is provided with three positioning structures 20 arranged at intervals in a triangular shape, each positioning structure 20 protrudes upward and extends to implement a block-shaped positioning block, and the upper surface of each positioning block is implemented as a positioning surface, one positioning structure 20 (for the convenience of description and distinction, this positioning structure 20 is described as the first positioning structure 21) is arranged on the longitudinal edge 53, one positioning structure 20 (for the convenience of description and distinction, this positioning structure 20 is described as the second positioning structure 22) is arranged on the edge 51 not connected to the longitudinal edge 53, and another positioning structure 20 (for the convenience of description and distinction, this positioning structure 20 is described as the third positioning structure 23) is arranged on one of the oblique edges 54 (the oblique edge 54 is the oblique edge 54 farthest from the other two positioning structures 20, so that a triangular support positioning can be formed for the reducer housing 70 to improve the support positioning reliability and stability). In addition, in the bottom surface of any inner frame 50, two profiling structures 40 of different sizes are provided on the lower end surface of the bottom surface of each placement area, and the two profiling structures 40 are respectively arranged at the bottom of the two transverse edges 52 and protrude downward. The structure of the bottom surface of the outer frame 10 is slightly simpler than that of the bottom surface of the inner frame 50, and the difference is that the lower end surface of the bottom surface of the outer frame 10 does not have a profiling structure 40. For the upper placement space, the profiling structure 40 corresponding to the reducer housing 70 placed therein is arranged on the top cover plate 30.

[0035] As for the structure of the top cover plate 30, the structure of the top cover plate 30 is different from the bottom surface structure of the inner frame 50 or the partition plate, and the structure of the top cover plate 30 is simpler. Figure 3 As shown, the top cover plate 30 includes a quadrilateral frame 31 with a hollow middle and a plurality of plates ( Figure 3 In the example, two transverse plates 32 and two longitudinal plates 33 are formed with four intersections. The bottom end of each intersection is formed with a cylindrical profiling structure 40 with the intersection as the center of the circle, which is used to position the four protruding parts on the two reducer housings 70 respectively. As an alternative embodiment, the two reducer housings 70 in each layer of the placement space in the cleaning fixture of the structural form of the above embodiment are arranged side by side left and right, while the two reducer housings 70 in each layer of the placement space in this embodiment are arranged side by side front and back. In this embodiment, two longitudinal edges 53 and one transverse edge 52 are provided on the bottom surface of the inner frame 50 and the bottom surface of the outer frame 10, and a positioning structure 20 is arranged on the transverse edge 52. The two profiling structures 40 in each placement area are arranged on the bottom end surface of the two longitudinal edges 53. As another alternative embodiment, the number of longitudinal edges 53 and transverse edges 52 can also be selected and designed according to the placement area. As another alternative embodiment, the bottom surface of the inner frame 50 does not include the longitudinal edge 53 or the transverse edge 52, but only includes four side edges 51, two transverse edges 52 or the longitudinal edge 53 and three oblique edges 54, that is, equivalent to Figure 1 The structure shown in the figure only takes the left half or the right half, and only one reducer housing 70 is placed in each layer of placement space. In this embodiment, two positioning structures 20 are arranged on the edge 51, and another positioning structure 20 is arranged on an oblique edge 54, while the transverse edge 52 or the longitudinal edge 53 is only used to set two profiling structures 40. As another alternative embodiment, when a partition is added to the frame body to divide the cavity of the frame body into a stacked structure of at least two placement spaces stacked up and down, the bottom surface of the frame body and the bottom surface of any partition correspond to the structural design of the bottom surface of the outer frame 10 and the bottom surface of the inner frame 50 mentioned above, which will not be repeated here, and the above description is specifically referred to. The structural form of the partition is adopted, although the volume or size is smaller, but the partition may be more easily skewed when placed, which is not as convenient to place as the structural form of the inner frame 50 mentioned above. The profiling structure 40 is arranged on the top cover plate 30 and is detachable, which reduces the occupied space while ensuring the stability of the clamping.

[0036] Preferably, the structures of the three positioning structures 20 are not completely the same, and are specifically determined according to the structure of the reducer housing 70. In the embodiment of the utility model, in addition to the positioning blocks that protrude upward, two positioning structures 20 also have positioning pins that protrude upward on the positioning surfaces at the upper ends of the positioning blocks. Another positioning structure 20 is only a positioning block that protrudes upward. That is, some positioning structures 20 only include positioning blocks, and some positioning structures 20 include both positioning blocks and positioning pins. Specifically, as Figure 2 As shown, the positioning structure 20 on the oblique edge 54, that is, the third positioning structure 23, includes a third positioning block 230, and no positioning pin is arranged on the third positioning block 230. The positioning surfaces of the first positioning structure 21 and the second positioning structure 22 are both provided with positioning pins protruding and extending upward, that is, they include positioning blocks and positioning pins. Specifically, the first positioning structure 21 includes a first positioning block 210 and a first positioning pin 212 arranged on the first positioning surface 211; the second positioning structure 22 includes a second positioning block 220 and a second positioning pin 222 arranged on the second positioning surface 221.

[0037] For the contoured structure 40, if Figure 1 and Figure 3 to Figure 4 As shown, each reducer housing 70 corresponds to two profiling structures 40, and the sizes of the two profiling structures 40 are different, specifically one is large and the other is small. The two profiling structures 40 correspond to two raised parts (not shown) on the reducer housing 70. The smaller one of the two raised parts (described as the first raised part 71 for the convenience of description and distinction) is the area corresponding to the input shaft, and the other larger one (described as the second raised part 72 for the convenience of description and distinction) is the area corresponding to the output shaft. In order to achieve the positioning and fixing of the two raised parts of the reducer housing 70, the two profiling structures 40 are both hollow cylindrical structures that match the shapes and sizes of the two raised parts. When clamping, after the reducer housing 70 is positioned on the positioning structure 20, the two raised parts of the reducer housing 70 are respectively inserted into the corresponding profiling structures 40 of the two cylindrical structures, thereby achieving the positioning of the side of the reducer housing 70 with the raised parts.

[0038] As for the guide structure 60, in the embodiment of the present invention, the periphery of each reducer housing 70 placement area is provided with a guide structure 60 consisting of five guide rods 61, and the five guide rods 61 are located around the periphery of the three positioning structures 20. Specifically, as Figure 1 and Figure 2As shown, three adjacent side edges 51 are each provided with a guide rod 61 extending vertically upward, and two guide rods 61 are provided at intervals and extending vertically upward on the longitudinal edge 53. The height of each guide rod 61 may be different, mainly depending on the height of each part of the reducer housing 70. It should be noted that the setting of the guide structure 60 is not limited to the above-mentioned five guide rods 61, and is mainly selected and designed according to the shape of the reducer housing 70.

[0039] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A cleaning jig for a reducer housing, characterized in that: include: The frame body is a cubic frame having a cavity inside which can accommodate at least one reducer housing; A positioning structure, which is arranged on the bottom surface of the frame body and protrudes upward to support and position one side of the reducer housing to be cleaned; A top cover plate, which is detachably covered on the top surface of the frame body; A contoured structure is arranged on the inner end surface of the top cover plate and matches the shape of the other surface of the reducer housing so as to be used for positioning the surface of the reducer housing provided with the raised portion.

2. The cleaning tool according to claim 1, characterized in that: The cleaning jig is a multi-layer structure stacked up and down, and the upper layer can be taken out separately, and at least one reducer housing can be placed in any layer.

3. The cleaning tool according to claim 2, characterized in that: The frame body is implemented as an outer frame, at least one inner frame is stacked vertically in the cavity in the outer frame, and all the inner frames can be taken out separately, at least one inner frame divides the cavity of the outer frame into at least two placement spaces stacked up and down, any of the inner frames is formed with a placement space that can accommodate at least one reducer housing, and the top surface of any of the inner frames is completely hollowed out, the bottom surface of the outer frame is implemented as the bottom surface of the placement space at the bottom layer, and in any two adjacent inner frames, the bottom surface of the inner frame at the upper layer is implemented as the cover plate of the inner frame at the lower layer, and the top cover plate is implemented as the cover plate of the placement space at the top layer; The bottom surface of the outer frame and the upper end surface of the bottom surface of any inner frame are both provided with the positioning structure, and the lower end surface of the bottom surface of any inner frame is provided with the profiling structure.

4. The cleaning tool according to claim 3, characterized in that: At least one transversely arranged and removable partition is vertically spaced in the frame body to divide the cavity in the frame body into at least two placement spaces stacked up and down; Any of the partitions serves as a cover for the lower placement space therebelow, and the bottom surface of the frame body and the upper surface of any of the partitions are provided with the positioning structure protruding and extending upward, and the lower surface of any of the partitions is provided with the contouring structure protruding and extending downward.

5. The cleaning tool according to claim 4, characterized in that: The positioning structure includes three positioning blocks that are arranged in a triangle shape along the circumferential direction and protrude upwards. The upper surface of any one of the positioning blocks is implemented as a positioning surface, and positioning pins that protrude and extend upwards are formed on the positioning surfaces of some of the positioning blocks.

6. The cleaning tool according to claim 5, characterized in that: When the cleaning jig has only one layer, a plurality of hollow portions are provided on the bottom surface of the frame body so that the bottom surface of the frame body is formed with four edges and at least two longitudinal edges or transverse edges and at least two oblique edges located in the middle area of ​​the edges; when the cleaning jig is a multi-layer stacked structure, the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions have a plurality of hollow portions so that the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions are formed with four edges and at least two longitudinal edges or transverse edges and at least two oblique edges located in the middle area of ​​the edges; Two of the three positioning structures are arranged on two adjacent edges, and one is arranged on the oblique edge.

7. The cleaning tool according to claim 5, characterized in that: When the cleaning jig has only one layer, a plurality of hollow portions are provided on the bottom surface of the frame body so that the bottom surface of the frame body is formed with four edges and at least two transverse edges, at least one longitudinal edge or at least two longitudinal edges, at least one transverse edge and at least two oblique edges located in the middle area of ​​the edges; when the cleaning jig is a multi-layer stacked structure, the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions have a plurality of hollow portions so that the bottom surface of the outer frame and the bottom surface of any of the inner frames or the bottom surface of the frame body and any of the partitions are formed with four edges and at least two transverse edges, at least one longitudinal edge or at least two longitudinal edges, at least one transverse edge and at least two oblique edges located in the middle area of ​​the edges; One of the three positioning structures is arranged on one of the side edges, one is arranged on the longitudinal edge or the transverse edge, and another is arranged on the oblique edge.

8. The cleaning tool according to any one of claims 1 to 4, characterized in that: Any reducer housing to be cleaned corresponds to two contour structures of different sizes, and any contour structure is implemented as a cylindrical structure having an inner hollow cavity for the raised portion on the reducer housing to be snap-fitted and fixed and protruding downward.

9. The cleaning tool according to claim 8, characterized in that: The top cover plate includes a quadrilateral frame with a hollow middle and a plurality of plates arranged in a vertical and horizontal cross-arrangement at the hollow middle of the frame, and any of the contour structures is arranged at the intersection of the horizontal plate and the longitudinal plate.

10. The cleaning tool according to any one of claims 1 to 4, characterized in that: It also includes a guide structure consisting of a plurality of guide rods which are arranged at intervals around the periphery of the positioning structure, protrude and extend upward, and are located outside the reducer housing.

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