A waterproof gearbox for a sweeper

Abstract

This utility model discloses a waterproof gearbox for a sweeper, including a gearbox, a motor, a housing, a head sealing structure, a tail sealing assembly, and a base plate assembly. The gearbox is disposed inside the front side of the housing, and the motor is disposed inside the rear side of the housing. The bearing of the motor is connected to the gearbox for transmission. The head sealing structure is disposed inside the housing and on the front side of the gearbox. The tail sealing assembly is disposed between the bottom end of the housing and the base plate assembly. The tail sealing assembly includes sealant and several oil-sealed stainless steel springs, with the oil-sealed stainless steel springs sleeved on the sealant. This utility model provides a waterproof gearbox for a sweeper, which can improve the waterproof performance of the product. In addition, during operation, it can prevent water from entering the gearbox, thereby avoiding sweeper failure due to short circuit caused by water ingress, ensuring the transmission stability of the gearbox and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a waterproof gearbox for a sweeper. Background Technology

[0002] As a core drive and transmission component, the gearbox is widely used in devices requiring power transmission, and its stability directly affects the efficiency and lifespan of the entire machine. This is especially critical in sweepers, where the gearbox drives the brush-equipped rollers to achieve the cleaning purpose.

[0003] Because sweepers often operate in damp, wastewater-filled environments, the gearbox must be waterproof. On one hand, the connection between the roller and the gearbox must prevent wastewater from seeping in; on the other hand, the gearbox itself must prevent its internal circuitry and transmission mechanism from coming into contact with water.

[0004] However, the current sweeper gearboxes on the market lack sufficient waterproof performance, making them unsuitable for wading or humid environments. Water can easily seep into the gearbox, causing short circuits and sweeper malfunctions. This not only affects the transmission stability of the sweeper but also shortens its lifespan.

[0005] Therefore, it is necessary to improve existing technologies. Utility Model Content

[0006] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, one objective of the present invention is to provide a waterproof gearbox for a sweeper, which can improve the waterproof performance of the product.

[0007] The above objective is achieved through the following technical solution:

[0008] A waterproof gearbox for a sweeping machine includes a gearbox, a motor, a housing, a head sealing structure, a tail sealing assembly, and a base plate assembly. The gearbox is disposed inside the front side of the housing, the motor is disposed inside the rear side of the housing, the bearing of the motor is connected to the gearbox for transmission, the head sealing structure is disposed inside the housing and on the front side of the gearbox, and the tail sealing assembly is disposed between the bottom end of the housing and the base plate assembly.

[0009] The base plate assembly is provided with a mounting part for connecting to the rear end of the housing. The mounting part is provided with a stainless steel support part, which includes a support bottom and a support side extending upward from the inner diameter of the support bottom. The tail sealing assembly includes sealant and several oil-sealed stainless steel springs. The oil-sealed stainless steel springs are sleeved on the sealant. The lower end of the sealant is sleeved on the outer periphery of the stainless steel support part and contacts the support bottom and support side.

[0010] In some embodiments, the base plate assembly includes a tail fixing plate and a plastic part. The tail fixing plate is a stainless steel plate, and the tail fixing plate is wrapped by the plastic part. The upper end of the plastic part and the upper end of the tail fixing plate together form the mounting portion.

[0011] In some embodiments, a motor rear end cover is provided at the rear end of the motor, a tail bearing seat is provided at the bottom end of the motor rear end cover, a motor terminal is provided at the rear end of the motor rear end cover and outside the tail bearing seat, a rear bearing is sleeved on the outer periphery of the rear side of the tail bearing seat, and the tail sealing assembly further includes a sealant support skeleton, the sealant support skeleton is provided outside the rear bearing, and the upper end of the sealant is sleeved on the sealant support skeleton.

[0012] In some embodiments, a protruding sealing portion is provided in the middle of the outer side of the sealant, and several semi-circular sealant rings are provided on both sides of the sealing portion, and the several semi-circular sealant rings on both sides are respectively tightly connected to the inner side of the outer shell and the bottom plate assembly.

[0013] In some embodiments, a first deformable sealing lip that contacts the support side and a second deformable sealing lip that contacts the bottom of the support are provided at the lower end of the sealant. A V-shaped first oil seal stainless steel spring groove is formed between the second deformable sealing lip and the semi-circular sealant. A first oil seal stainless steel spring is provided in the first oil seal stainless steel spring groove.

[0014] In some embodiments, a third deformable sealing lip is provided at the lower end of the sealant. The third deformable sealing lip is disposed between the sealant support skeleton and the support side. The third deformable sealing lip forms a V-shaped second oil seal stainless steel spring groove in the direction of the motor. A second oil seal stainless steel spring is disposed in the second oil seal stainless steel spring groove.

[0015] In some embodiments, the mounting part further includes a wire passage hole and a rear end cover support surface. After the wire passes through the wire passage hole, it is connected to an external power source. After the wire is inserted into the wire passage hole, the wire passage hole is sealed with a sealing adhesive. A sealing gasket is placed on the rear end cover support surface. The motor rear end cover is connected to the rear end cover support surface through the sealing gasket. The base plate assembly is provided with a screw fixing position. The base plate assembly is connected to the tail bearing seat after the screw passes through the screw fixing position.

[0016] In some embodiments, a front bearing is provided on the outer side of the front end of the gearbox and inside the housing.

[0017] In some embodiments, the head sealing structure includes a soft rubber, screws connecting the housing to the gearbox output shaft, the soft rubber being inserted into a through hole at the front end of the housing, and the soft rubber being interference-fitted with the through hole.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] This utility model proposes a waterproof gearbox for a sweeper, which can improve the waterproof performance of the product.

[0020] In addition, it can prevent water from entering the gearbox during operation, thereby avoiding the failure of the sweeper due to short circuit caused by water ingress, ensuring the stability of gearbox transmission and extending its service life. Attached Figure Description

[0021] Figure 1 This is a structural cross-sectional view of the waterproof gearbox in Example 1;

[0022] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0023] Figure 3 yes Figure 2 A magnified view of part B in the middle section;

[0024] Figure 4 This is a three-dimensional schematic diagram of Example 1 after the outer shell has been removed;

[0025] Figure 5 This is a rear view of the base plate assembly in Example 1;

[0026] Figure 6 This is a structural cross-sectional view of the base plate assembly in Embodiment 1;

[0027] Figure 7 This is a three-dimensional schematic diagram of the base plate assembly in Embodiment 1;

[0028] Figure 8 This is a three-dimensional schematic diagram of the stainless steel support part in Example 1;

[0029] Figure 9 This is a three-dimensional schematic diagram of the sealant in Example 1;

[0030] Figure 10 This is a structural cross-sectional view (1) of the sealant and sealant support skeleton in Example 1;

[0031] Figure 11 This is a structural cross-sectional view (2) of the sealant and sealant support frame in Example 1;

[0032] Figure 12 This is a cross-sectional view (1) of the sealant, sealant support frame and oil seal stainless steel spring in Example 2;

[0033] Figure 13 This is a cross-sectional view (2) of the sealant, sealant support frame and oil seal stainless steel spring in Example 2.

[0034] In the diagram: 1. Gearbox; 2. Motor; 21. Tail bearing housing; 22. Motor rear end cover; 23. Motor terminal; 3. Housing; 31. Through hole; 4. Head sealing structure; 41. Soft rubber; 5. Tail sealing assembly; 51. Sealant; 511. Sealing part; 512. Semi-circular rubber; 52. Oil seal stainless steel spring; 521. First oil seal stainless steel spring; 522. Second oil seal stainless steel spring; 53. Sealant support frame; 54. First deformation 55. Sealing lip; 56. Second deformed sealing lip; 57. First oil seal stainless steel spring groove; 58. Third deformed sealing lip; 6. Second oil seal stainless steel spring groove; 6. Base plate assembly; 61. Mounting part; 611. Rear end cover support surface; 612. Cable guide hole; 62. Tail end fixing plate; 63. Plastic parts; 64. Sealing gasket; 65. Screw fixing position; 7. Rear bearing; 8. Stainless steel support part; 81. Support bottom; 82. Support side; 9. Front bearing. Detailed Implementation

[0035] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0036] like Figures 1 to 11 As shown, Embodiment 1 provides a waterproof gearbox for a sweeper, including a gearbox 1, a motor 2, a housing 3, a head sealing structure 4, a tail sealing assembly 5, and a base plate assembly 6. The gearbox 1 is disposed inside the front side of the housing 3, the motor 2 is disposed inside the rear side of the housing 3, and the bearing of the motor 2 is connected to the gearbox 1 for transmission. The head sealing structure 4 is disposed inside the housing 3 and on the front side of the gearbox 1, and the tail sealing assembly 5 is disposed between the bottom end of the housing 3 and the base plate assembly 6.

[0037] The base plate assembly 6 is provided with a mounting portion 61 for connecting to the rear end of the outer casing 3. A stainless steel support portion 8 is provided on the mounting portion 61. The stainless steel support portion 8 includes a support bottom 81 and a support side portion 82 extending upward from the inner diameter of the support bottom 81. The tail sealing assembly 5 includes a sealant 51 and several oil-sealed stainless steel springs 52. The oil-sealed stainless steel springs 52 are sleeved on the sealant 51. The lower end of the sealant 51 is sleeved on the outer periphery of the stainless steel support portion 8 and contacts the support bottom 81 and the support side portion 82. The surface of the stainless steel support portion 8 is smooth, making the contact area between the base plate assembly 6 and the sealant 51 smooth, achieving a seal at the contact point. Furthermore, the sealant 51 is a wear-resistant soft rubber, generally molded using a die-casting method.

[0038] This utility model discloses a waterproof gearbox for a sweeper, which has excellent waterproof performance. In particular, it can prevent water from entering the gearbox during operation, thereby avoiding sweeper failure due to short circuit caused by water ingress, ensuring gearbox transmission stability and extending service life.

[0039] Specifically, the base plate assembly 6 includes a tail fixing plate 62 and a plastic part 63. The tail fixing plate 62 is made of stainless steel and is wrapped by the plastic part 63. The upper end of the plastic part 63 and the upper end of the tail fixing plate 62 together form the mounting part 61. Because the plastic part 63 is easily deformed, the tail fixing plate 62 is made of stainless steel to prevent deformation of the plastic part 63, while also strengthening the mounting part 61 and improving its support.

[0040] Furthermore, a rear end cover 22 is provided at the rear end of the motor 2, and a tail bearing seat 21 is provided at the bottom end of the rear end cover 22. A motor terminal 23 is provided at the rear end of the rear end cover 22 and outside the tail bearing seat 21. A rear bearing 7 is sleeved on the outer periphery of the rear side of the tail bearing seat 21. The tail sealing assembly 5 also includes a sealant support frame 53. The sealant support frame 53 is located outside the rear bearing 7, and the upper end of the sealant 51 is sleeved on the sealant support frame 53. The sealant support frame 53 is a metal part, which can not only fix the mechanism of each component inside the sealant support frame 53, but also support the sealant 51 on the outside, maintaining the stability of the connection between the motor 2 and the tail sealing assembly 5.

[0041] Preferably, the sealant 51 has a protruding sealing portion 511 in the middle of its outer side, and several semi-circular sealant rings 512 are provided on both sides of the sealing portion 511. These semi-circular sealant rings 512 are respectively tightly connected to the inner side of the outer shell 3 and the base plate assembly 6. The sealing portion 511 has a positioning function, allowing manufacturers to more intuitively observe and accurately position the sealant 51 during assembly. The number of semi-circular sealant rings 512 can be increased as needed. In particular, the semi-circular sealant rings 512 are interference-fitted with the outer shell 3, providing multiple layers of waterproofing to the inner side of the outer shell 3.

[0042] Specifically, a first deformable sealing lip 54 that contacts the support side 82 and a second deformable sealing lip 55 that contacts the support bottom 81 are provided at the lower end of the sealant 51. A V-shaped first oil seal stainless steel spring groove 56 is formed between the second deformable sealing lip 55 and the semi-circular sealant 512, and a first oil seal stainless steel spring 521 is provided in the first oil seal stainless steel spring groove 56. Thus, under the action of the first oil seal stainless steel spring 521, the second deformable sealing lip 55 and the semi-circular sealant 512 maintain contact with the support side 82 and the support bottom 81, preventing water ingress.

[0043] like Figure 12 and Figure 13 As shown, Embodiment 2 provides a waterproof gearbox for a sweeper. A third deformable sealing lip 57 is provided at the lower end of the sealant 51. The third deformable sealing lip 57 is located between the sealant support frame 53 and the support side 82. The third deformable sealing lip 57 forms a V-shaped second oil seal stainless steel spring groove 58 in the direction of the motor 2. A second oil seal stainless steel spring 522 is provided in the second oil seal stainless steel spring groove 58.

[0044] The first oil seal stainless steel spring groove 56 and the second oil seal stainless steel spring groove 58 can also be a semi-circular arc or other irregular arc shape, as long as the shape is conducive to its deformation, they can be used in this application.

[0045] Furthermore, the first oil seal stainless steel spring 521 provided in Embodiment 1 and the structure that simultaneously provides the first oil seal stainless steel spring 521 and the second oil seal stainless steel spring 522 in Embodiment 2 both serve at least a supporting and positioning function. All of the above arrangements are designed to ensure that the first, second, or third deformable sealing lips maintain full contact with each contact surface on the stainless steel support portion 8 under the action of the multiple oil seal stainless steel springs 52. Thus, a multiple sealing structure is provided to prevent water from flowing into the gearbox.

[0046] Furthermore, the mounting part 61 also includes a wire passage hole 612 and a rear end cover support surface 611. The wire passes through the wire passage hole 612 and connects to an external power source. After the wire is inserted into the wire passage hole 612, the wire passage hole 612 is sealed with a sealing adhesive. A sealing gasket 64 is placed on the rear end cover support surface 611. The motor rear end cover 22 is connected to the rear end cover support surface 611 through the sealing gasket 64. The base plate assembly 6 is provided with a screw fixing position 65. The base plate assembly 6 is connected to the tail bearing seat 21 by screws passing through the screw fixing position 65. This maintains a sealed connection between the motor 2, the housing 3, and the base plate assembly 6.

[0047] Furthermore, a front bearing 9 is provided on the outer front end of the gearbox 1 and inside the housing 3. Since the motor 2, gearbox 1, and base plate assembly 6 are relatively stationary, only the housing 3 rotates. The output shaft of the gearbox 1 is fixed to the housing 3 with screws, and the rotation of the output shaft drives the housing 3 to rotate. The outer surfaces of the front bearing 9 and the rear bearing 7 are fixed to the inner surfaces of the housing 3, allowing the housing 3 to operate more smoothly.

[0048] Preferably, the head sealing structure 4 includes a soft adhesive 41. A screw connects the housing 3 to the gearbox output shaft. The soft adhesive 41 is inserted into the through-hole 31 at the front end of the housing 3, and the soft adhesive 41 is press-fitted into the through-hole 31. A through-hole 31 is formed at the front end of the housing 3. The screw connects the housing 3 to the gearbox output shaft within the through-hole 31. There is still space in the through-hole 31 behind the screw. To seal the front end of the housing 3, the soft adhesive 41 is inserted to seal this remaining space. Alternatively, silicone sealant or other similar sealing adhesives that can transform from fluid to solid can be used to seal the through-hole 31.

[0049] The assembly method of this waterproof gearbox for the sweeper is as follows: The tail bearing housing 21 is fixed to the motor end cover with screws; the rear bearing 7 is pressed into the tail sealing assembly 5, making it fit against the inner surface of the sealant support frame 53; then, the rear bearing 7 is fitted into the bearing position of the tail bearing housing 21. At this time, several semi-circular rubber pieces 512 are interference-fitted with the outer casing 3. Next, the base plate assembly 6 is installed into the corresponding position of the tail bearing housing 21 with screws. Sealant is applied to the wire hole 612 to seal it. Finally, the entire gearbox 1 forms a sealed structure.

[0050] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A waterproof gearbox for a sweeper, characterized in that: The device includes a gearbox (1), a motor (2), a housing (3), a head sealing structure (4), a tail sealing assembly (5), and a base plate assembly (6). The gearbox (1) is located inside the front side of the housing (3), and the motor (2) is located inside the rear side of the housing (3). The bearing of the motor (2) is connected to the gearbox (1) in a transmission manner. The head sealing structure (4) is located inside the housing (3) and in front of the gearbox (1). The tail sealing assembly (5) is located between the bottom end of the housing (3) and the base plate assembly (6). The base plate assembly (6) is provided with a mounting part (61) for connecting to the rear end of the outer shell (3). The mounting part (61) is provided with a stainless steel support part (8). The stainless steel support part (8) includes a support bottom (81) and a support side part (82) extending upward from the inner diameter of the support bottom (81). The tail sealing assembly (5) includes a sealant (51) and a plurality of oil-sealed stainless steel springs (52). The oil-sealed stainless steel springs (52) are sleeved on the sealant (51). The lower end of the sealant (51) is sleeved on the outer periphery of the stainless steel support part (8) and contacts the support bottom (81) and the support side part (82).

2. The waterproof gearbox of a sweeper according to claim 1, characterized in that: The base plate assembly (6) includes a tail fixing plate (62) and a plastic part (63). The tail fixing plate (62) is a stainless steel plate. The tail fixing plate (62) is wrapped by the plastic part (63). The upper end of the plastic part (63) and the upper end of the tail fixing plate (62) together form the mounting part (61).

3. The waterproof gearbox of a sweeper according to claim 2, characterized in that: The motor (2) is provided with a motor rear end cover (22) at the rear end, and a tail bearing seat (21) is provided at the bottom end of the motor rear end cover (22). A motor terminal (23) is provided at the rear end of the motor rear end cover (22) and outside the tail bearing seat (21). A rear bearing (7) is sleeved on the outer periphery of the rear side of the tail bearing seat (21). The tail sealing assembly (5) also includes a sealant support frame (53). The sealant support frame (53) is provided outside the rear bearing (7), and the upper end of the sealant (51) is sleeved on the sealant support frame (53).

4. The waterproof gearbox of a sweeper according to claim 3, characterized in that: The sealant (51) has a protruding sealing part (511) in the middle of its outer side, and several semi-circular adhesive rings (512) are provided on both sides of the sealing part (511). The semi-circular adhesive rings (512) on both sides are tightly connected to the inner side of the outer shell (3) and the bottom plate assembly (6).

5. The waterproof gearbox of a sweeper according to claim 4, characterized in that: A first deformable sealing lip (54) that contacts the support side (82) and a second deformable sealing lip (55) that contacts the support bottom (81) are provided at the lower end of the sealant (51). A V-shaped first oil seal stainless steel spring groove (56) is formed between the second deformable sealing lip (55) and the semi-circular adhesive (512). A first oil seal stainless steel spring (521) is provided in the first oil seal stainless steel spring groove (56).

6. The waterproof gearbox of a sweeper according to claim 5, characterized in that: A third deformable sealing lip (57) is provided at the lower end of the sealant (51). The third deformable sealing lip (57) is located between the sealant support frame (53) and the support side (82). The third deformable sealing lip (57) forms a V-shaped second oil seal stainless steel spring groove (58) in the direction of the motor (2). A second oil seal stainless steel spring (522) is provided in the second oil seal stainless steel spring groove (58).

7. The waterproof gearbox of a sweeper according to claim 6, characterized in that: The mounting part (61) also includes a wire passage hole (612) and a rear end cover support surface (611). The wire passes through the wire passage hole (612) and is connected to an external power source. After the wire is inserted into the wire passage hole (612), the wire passage hole (612) is sealed with a sealing adhesive. A sealing gasket (64) is placed on the rear end cover support surface (611). The motor rear end cover (22) is connected to the rear end cover support surface (611) through the sealing gasket (64). The base plate assembly (6) is provided with a screw fixing position (65). The base plate assembly (6) is connected to the tail bearing seat (21) through a screw passing through the screw fixing position (65).

8. A waterproof gearbox for a sweeper according to any one of claims 1-7, characterized in that: A front bearing (9) is provided on the outer front end of the gearbox (1) and inside the outer casing (3).

9. A waterproof gearbox for a sweeper according to any one of claims 1-7, characterized in that: The head sealing structure (4) includes a soft rubber (41), and screws connect the housing (3) to the gearbox output shaft. The soft rubber (41) is inserted into the through hole (31) at the front end of the housing (3), and the soft rubber (41) is interference-fitted with the through hole (31).

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