A sealed and protected integrated transmission device for motor and fan of a washing and sweeping vehicle

Abstract

A kind of sealing protection integrated transmission device of motor and fan of washing and sweeping vehicle, including fan, drive motor, sealing structure, fan includes fan shell body, wind wheel;Drive motor is equipped with motor output shaft for connecting wind wheel;Sealing structure is connected between fan and drive motor, and sealing structure includes sealing positioning ring group, sealing rubber pad, sealing flange;Wherein, drive motor side towards fan is equipped with motor boss structure, sealing positioning ring group is connected in motor boss structure for sealing;Sealing rubber pad one end is connected in sealing positioning ring group, other end is abutted in fan shell body for sealing;Sealing flange is connected in motor output shaft, motor output shaft and wind wheel rotation are connected in fan shell body, and sealing flange is abutted on wind wheel and rotates to seal together.This scheme adopts the structural design of double active sealing structure, reaches the effect of improving the connection sealing property between drive motor and fan, reducing maintenance cost and prolonging the service life of drive motor.

Description

Technical Field

[0001] This utility model belongs to the technical field of sanitation vehicles, and in particular relates to a sealed and protective integrated transmission device for the motor and fan of a sweeper truck. Background Technology

[0002] In road sweeping vehicles, the configuration of direct coupling between the drive motor and the fan is widely used. This configuration has significant structural advantages, including minimizing space occupation, improving kinetic energy transfer efficiency, and simplifying the installation and maintenance process. Furthermore, since this configuration eliminates the need for additional transmission devices, energy loss during the transmission process can be effectively reduced.

[0003] In the prior art, when implementing a configuration scheme in which the drive motor and the fan are directly coupled, the drive motor shaft is directly connected to the fan impeller. However, under this configuration, due to the inadequate sealing between the fan and the drive motor shaft, water mist and impurities can enter the motor through the drive motor shaft, which can easily damage or cause malfunctions to the drive motor, thereby shortening the service life of the drive motor. Therefore, this utility model proposes a new solution to the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a sealed and protective integrated transmission device for the motor and fan of a sweeper truck. It adopts a double active sealing structure design, which significantly improves the connection sealing between the drive motor and the fan, reduces the maintenance cost of the drive motor, and extends the service life of the drive motor.

[0005] Based on this, the present invention provides a sealed and protective integrated transmission device for the motor and fan of a sweeper truck, comprising:

[0006] The fan includes a fan casing and a fan impeller;

[0007] A drive motor, wherein the drive motor is provided with a motor output shaft for connecting to the wind turbine;

[0008] A sealing structure is provided, which is connected between the fan and the drive motor, and includes a sealing positioning ring assembly, a sealing gasket, and a sealing flange.

[0009] The drive motor has a motor boss structure on the side facing the fan, and the sealing positioning ring group is connected to the motor boss structure for sealing; one end of the sealing gasket is connected to the sealing positioning ring group, and the other end abuts against the fan housing body for sealing; the sealing flange is connected to the motor output shaft, the motor output shaft is rotatably connected to the fan wheel in the fan housing body, and the sealing flange abuts against the fan wheel and rotates together to seal.

[0010] As described above, a sealing and protective integrated transmission device for a sweeper motor and a blower includes a motor output shaft with a first stepped shaft and a second stepped shaft for limiting the sealing flange. The sealing flange has a first sealing flange connection hole, which has a first limiting annular protrusion extending towards the central axis. The first limiting annular protrusion is used to prevent moisture or impurities from entering the first stepped shaft. The end of the first limiting annular protrusion forms a second sealing flange connection hole, which is connected to the first stepped shaft and the second stepped shaft, respectively.

[0011] As described above, the integrated transmission device for sealing and protecting the motor and fan of a sweeper truck includes a limit keyway on the motor output shaft, and the drive motor also includes a limit key for limiting the sealing flange and the impeller; the limit key is connected in the limit keyway and cooperates with the first stepped shaft to limit the sealing flange.

[0012] As described above, in a sealed and protective integrated transmission device for a sweeper motor and a blower, the impeller is provided with an impeller connecting groove for limiting the impeller; the impeller is engaged with the limiting key through the impeller connecting groove and abuts against the sealing flange.

[0013] As described above, a sealing and protective integrated transmission device for a sweeper motor and a blower includes a sealing positioning ring group comprising a first positioning ring and a second positioning ring. The motor boss structure is provided with a first boss and a second boss. The first positioning ring and the second positioning ring are respectively connected to the first boss and the second boss. The sealing gasket is connected inside the second positioning ring.

[0014] As described above, in a sealed and protective integrated transmission device for a sweeper motor and a blower, the thickness of the second positioning ring is greater than the thickness of the second boss, and the second positioning ring is provided with a second positioning ring hole; the second positioning ring is connected to the second boss through the second positioning ring hole, and the sealing gasket is connected inside the second positioning ring hole.

[0015] As described above, in the integrated transmission device for sealing and protecting the motor and fan of a sweeper truck, the sealing gasket has an elastic structure design, and the lower end of the sealing gasket is provided with a hydrophobic groove for draining infiltrated water or impurities.

[0016] As described above, a sealed and protective integrated transmission device for a sweeper motor and a blower includes a blower housing body comprising a front blower housing and a rear blower housing. The front blower housing and the rear blower housing are connected to form a mounting cavity for mounting the impeller. The impeller is connected to the motor output shaft within the mounting cavity.

[0017] As described above, a sealed and protective integrated transmission device for a sweeper motor and a blower is provided in which the rear housing of the blower is provided with a central hole for the motor output shaft to pass through. The motor output shaft passes through the central hole of the rear housing and is connected to the impeller. The inner diameter of the central hole of the rear housing is larger than the outer diameter of the sealing flange.

[0018] As described above, a sealed and protective integrated transmission device for a sweeper motor and a blower is provided. The drive motor is further provided with a blower mounting hole for connecting the blower housing body. Multiple blower mounting holes are set at equal angles on the outer side of the first boss. The rear housing of the blower is provided with blower rear housing fastening holes corresponding to the blower mounting holes one by one. The first positioning ring is provided with positioning ring fastening holes corresponding to the blower mounting holes one by one. The first fastener passes through the blower rear housing fastening holes and the positioning ring fastening holes to connect the blower rear housing and the first positioning ring in the blower mounting holes.

[0019] The beneficial effects of this utility model are as follows:

[0020] This solution employs a dual active sealing structure. Firstly, a sealing flange is installed on the motor output shaft, fixing it to the shaft and abutting against both the impeller and the drive motor for axial sealing. The sealing flange rotates with the motor output shaft, generating centrifugal force that effectively prevents water mist and impurities from penetrating radially. This axial and radial sealing of the motor output shaft forms the first layer of active sealing. Secondly, a motor boss structure is provided on the drive motor side facing the fan, and the sealing positioning ring assembly is connected to this boss structure, further reducing the impact on the drive motor. The connection gap between the motor and the fan enhances the stability of the structural connection and the radial sealing of the motor output shaft. Thirdly, one end of the sealing gasket is connected to the sealing positioning ring assembly, and the other end abuts against the fan housing body. When the fan housing body is fastened to the drive motor, the sealing gasket is squeezed to actively seal the connection gap between the drive motor and the fan, forming a second active seal. This effectively improves the radial sealing of the motor output shaft, achieving the effects of significantly improving the connection sealing between the drive motor and the fan, reducing the maintenance cost of the drive motor, and extending the service life of the drive motor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0023] Figure 2 This is a structural cross-sectional view of an embodiment of the present utility model;

[0024] Figure 3 For the corresponding Figure 2 Enlarged view of the A-section structure;

[0025] Figure 4 For the corresponding Figure 3 Enlarged view of the structure of section B;

[0026] Figure 5 This is an exploded view of the structure of an embodiment of the present utility model;

[0027] Figure 6 For the corresponding Figure 5 Enlarged view of the C-section structure;

[0028] Figure 7 For the corresponding Figure 5 Enlarged view of the structure of part D;

[0029] Figure 8 For the corresponding Figure 5 A schematic diagram of the structure in which the first positioning ring is installed on the drive motor;

[0030] Figure 9 For the corresponding Figure 8 A schematic diagram of the structure in which the second positioning ring is installed on the drive motor;

[0031] Figure 10 For the corresponding Figure 9 A schematic diagram of the structure in which the central sealing gasket is installed on the drive motor;

[0032] Figure 11 For the corresponding Figure 10 A schematic diagram of the structure of the center sealing flange installed on the drive motor;

[0033] Figure 12 For the corresponding Figure 11 A schematic diagram of the structure of the rear casing of the medium-sized fan mounted on the drive motor;

[0034] Figure 13 For the corresponding Figure 12 A schematic diagram of the structure of the wind turbine mounted on the drive motor.

[0035] In the diagram: 1-Fan, 11-Fan housing body, 111-Fan front housing, 1111-Air inlet, 1112-Air outlet, 112-Fan rear housing, 1121-Fan rear housing center hole, 1122-Fan rear housing fastening hole, 12-Impeller, 121-Impeller connecting groove, 122-Impeller rotation connecting hole; 2-Drive motor, 21-Motor output shaft, 211-First stepped shaft, 212-Second stepped shaft, 213-Limit keyway, 22-Motor boss structure, 221-First boss, 222- Second boss, 23-limit key, 24-fan mounting hole; 31-sealing positioning ring assembly, 311-first positioning ring, 3111-positioning ring fastening hole, 3112-first positioning ring hole, 312-second positioning ring, 3121-second positioning ring hole, 32-sealing gasket, 321-drain groove, 322-sealing gasket locking hole, 33-sealing flange, 331-first sealing flange connection hole, 332-first limit ring protrusion, 333-second sealing flange connection hole, 334-second limit ring protrusion. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] like Figures 1 to 13 As shown in the figure, this utility model embodiment provides a sealed and protective integrated transmission device for a sweeper motor and a blower, including: a blower 1, a drive motor 2, and a sealing structure. The blower 1 includes a blower housing body 11 and a blower wheel 12. The drive motor 2 is provided with a motor output shaft 21 for connecting the blower wheel. The sealing structure is connected between the blower 1 and the drive motor 2, and the sealing structure includes a sealing positioning ring group 31, a sealing gasket 32, and a sealing flange 33. The drive motor 2 has a motor boss structure 22 on the side facing the blower 1, and the sealing positioning ring group 31 is connected to the motor boss structure 22 for sealing. One end of the sealing gasket 32 ​​is connected to the sealing positioning ring group 31, and the other end abuts against the blower housing body 11 for active sealing. The sealing flange 33 is connected to the motor output shaft 21, and the motor output shaft 21 and the blower wheel 12 are rotatably connected to the blower housing body 11, and the sealing flange 33 abuts against the blower wheel 12 and rotates together to perform active sealing.

[0038] Preferably, in this embodiment of the present invention, the sealing flange 33 is fixedly connected to the motor output shaft 21 so that it rotates with the motor output shaft 21 by abutting against the impeller 12. The axial sealing performance of the motor output shaft 21 is improved through the axial blocking effect of the sealing flange 33. Furthermore, the centrifugal force generated by the rotation of the sealing flange 33 with the motor output shaft 21 can prevent water mist and impurities from entering the motor output shaft 21 in the radial direction, thus improving the radial sealing performance of the motor output shaft 21. The sealing flange 33 of this invention adopts a bidirectional blocking structural design, which directly forms an active seal on the motor output shaft 21 through bidirectional blocking, effectively preventing water mist and impurities from directly impacting the gap between the fan housing body 11 and the drive motor 2, thereby enhancing the sealing performance of the structural connection.

[0039] Preferably, in this embodiment of the present invention, by providing a motor boss structure 22 on the side of the drive motor 2 facing the fan 1, and connecting the sealing positioning ring group 31 to the motor boss structure 22, the connection gap between the drive motor 2 and the fan 1 is further reduced, and the radial sealing performance of the motor output shaft 21 is enhanced; at the same time, through the positioning function of the sealing positioning ring group 31, the stability of the connection between the fan 1 and the drive motor 2 is effectively enhanced.

[0040] Preferably, in this embodiment of the present invention, one end of the sealing gasket 32 ​​is connected inside the sealing positioning ring assembly 31, and the other end abuts against the fan housing body 11. When the fan housing body 11 is fastened to the drive motor 2, the fan housing body 11 and the drive motor 2 jointly squeeze the sealing gasket 32, so that the sealing gasket 32 ​​actively fits the connection gap between the drive motor 2 and the fan 1 to form an active seal, which effectively improves the radial sealing performance of the motor output shaft 21.

[0041] This utility model embodiment, through a three-stage barrier sealing structure design, effectively solves the technical problems of water mist and impurities from the road surface being sucked into the fan housing 11 during the high-speed rotation of the impeller 12 to generate suction, and then entering the drive motor 2 through the gap between the impeller 12 and the motor output shaft 21; and the vibration caused by abnormal rotation of the impeller 12 during high-speed rotation, which creates a connection gap between the motor output shaft 21 and the fan 1, allowing water mist and impurities to enter the drive motor 2 through the motor output shaft 21. This significantly improves the connection sealing between the drive motor 2 and the fan 1, reduces the maintenance cost of the drive motor 2, and extends the service life of the drive motor 2.

[0042] Specifically, the motor output shaft 21 is provided with a first stepped shaft 211 and a second stepped shaft 212 for limiting the sealing flange 33. The sealing flange 33 is provided with a first sealing flange connection hole 331. The first sealing flange connection hole 331 is provided with a first limiting annular protrusion 332 extending in the direction of the central axis. The first limiting annular protrusion 332 is used to prevent moisture or impurities from entering the first stepped shaft 211. The end of the first limiting annular protrusion 332 surrounds the second sealing flange connection hole 333. The first sealing flange connection hole 331 and the second sealing flange connection hole 333 are respectively connected to the first stepped shaft 211 and the second stepped shaft 212.

[0043] Preferably, in this embodiment of the present invention, the diameter of the first stepped shaft 211 is larger than the diameter of the second stepped shaft 212, so that the first sealing flange connection hole 331 of the sealing flange 33 is engaged with the first stepped shaft 211, and the second sealing flange connection hole 333 is engaged with the second stepped shaft 212. The first stepped shaft 211 restricts the first limiting annular protrusion 332, allowing the first limiting annular protrusion 332 to abut against the first stepped shaft 211. This seals the connection gap between the first sealing flange connection hole 331 and the first stepped shaft 211, forming an axial active seal and preventing water mist and impurities from entering through the first stepped shaft 211 in the axial direction. The sealing flange 33 is inserted into the drive motor 2, effectively enhancing the axial sealing performance of the motor output shaft 21. Simultaneously, the sealing flange 33 is fixedly connected to the motor output shaft 21. During rotation with the motor output shaft 21, the sealing flange 33 forms a radial active seal due to the centrifugal force, effectively preventing water mist and impurities (i.e., water mist and impurities on the outer surface of the sealing flange 33) from entering the second sealing flange connection hole 333, further enhancing the radial sealing performance of the sealing flange 33 on the motor output shaft 21. In this embodiment of the invention, the sealing flange 33 effectively enhances the sealing performance of the sealing structure by performing axial and radial active sealing on the motor output shaft 21.

[0044] Preferably, in this embodiment of the present invention, the sealing flange 33 is further provided with a second limiting annular protrusion 334 at one end facing the drive motor 2. The second limiting annular protrusion 334 effectively blocks water mist and impurities from entering the shaft hole of the motor output shaft 21 through the outside of the sealing flange 33, thereby further enhancing the axial sealing of the motor output shaft 21.

[0045] Furthermore, the motor output shaft 21 is also provided with a limiting keyway 213, and the drive motor 2 also includes a limiting key 23 for limiting the sealing flange 33 and the impeller 12; the limiting key 23 is connected in the limiting keyway 213 and cooperates with the first stepped shaft 211 to limit the sealing flange 33.

[0046] Preferably, in this embodiment of the present invention, the limiting key 23 is detachably connected to the limiting keyway 213; when the drive motor 2 is connected to the fan 1, the limiting key 23 is first removed from the limiting keyway 213, the sealing flange 33 is inserted into the motor output shaft 21, and the first limiting annular protrusion 332 is abutted against the first stepped shaft 211. Then, the limiting key 23 is inserted into the limiting keyway 213 through an interference fit. By limiting the sealing flange 3 in both directions, the first limiting annular protrusion 332 is firmly abutted against the first stepped shaft 211, effectively preventing water mist and impurities from directly entering the first stepped shaft 211 in the axial direction through the first limiting annular protrusion 332, thereby enhancing the axial sealing of the motor output shaft 21.

[0047] Furthermore, the impeller 12 is provided with an impeller rotation connection hole 122 for connecting the motor output shaft 21 and an impeller connection groove 121 for limiting the impeller 12. The impeller connection groove 121 communicates with the impeller rotation connection hole 122. The impeller 12 is engaged with the limiting key 23 through the impeller connection groove 121 and abuts against the sealing flange 33.

[0048] Preferably, in this embodiment of the present invention, the impeller connecting groove 121 extends axially and penetrates the body of the impeller 12. When the motor output shaft 21 is connected in the impeller rotating connecting hole 122 and the limiting key 23 is engaged in the impeller connecting groove 121, the impeller 12 is constrained in both the radial and axial directions, so that the motor output shaft 21 drives the impeller 12 to rotate during rotation. At the same time, the end face of the impeller 12 is in close contact with the end face of the sealing flange 33 and rotates synchronously to form a rotating sealing interface, so that the contact surface between the sealing flange 33 and the impeller 12 moves to generate centrifugal force, so as to discharge water mist and impurities that may invade the motor output shaft 21 to the outside, effectively enhancing the axial sealing of the motor output shaft 21.

[0049] Furthermore, the sealing positioning ring assembly 31 includes a first positioning ring 311 and a second positioning ring 312, the motor boss structure 22 is provided with a first boss 221 and a second boss 222, the first positioning ring 311 and the second positioning ring 312 are respectively connected to the first boss 221 and the second boss 222, and the sealing gasket 32 ​​is connected inside the second positioning ring 312.

[0050] Preferably, in this embodiment of the present invention, the first positioning ring 311 is an auxiliary positioning ring, used to assist the fan 1 in connecting to the drive motor 2, so as to reduce the connection gap between the two; at the same time, the first positioning ring 311 is provided with a first positioning ring hole 3112; the first positioning ring 311 is inserted into the first boss 221 through the first positioning ring hole 3112, and is used to be coaxially positioned with the motor output shaft 21, which effectively enhances the stability of the connection between the fan 1 and the drive motor 2; the second positioning ring 312 is connected to the second boss 222, so that after the sealing gasket 32 ​​is connected in the second positioning ring 312, it can effectively prevent radial sliding during the process of the fan housing body 11 squeezing the sealing gasket 32, thereby enhancing the radial sealing of the motor output shaft 21.

[0051] Furthermore, the thickness of the second positioning ring 312 is greater than the thickness of the second boss 222, and the second positioning ring 312 is provided with a second positioning ring hole 3121; the second positioning ring 312 is connected to the second boss 222 through the second positioning ring hole 3121, and the sealing gasket 32 ​​is connected inside the second positioning ring hole 3121.

[0052] Preferably, in this embodiment of the present invention, the thickness of the second positioning ring 312 is greater than the thickness of the second boss 222, so that the second positioning ring hole 3121 and the second boss 222 form a sleeve fit, ensuring the connection accuracy and stability of the second positioning ring hole 3121 and the second boss 222; at the same time, the portion of the second positioning ring hole 3121 extending beyond the second boss 222 provides an annular mounting space for the sealing gasket 32, so that after the sealing gasket 32 ​​is connected inside the second positioning ring 312 and abuts against the second boss 222, the radial movement of the sealing gasket 32 ​​is restricted by the annular mounting space, avoiding displacement of the sealing gasket 32 ​​due to vibration or pressure changes, thereby enhancing the stability of the sealing gasket 32 ​​during use and improving the sealing performance of the sealing gasket 32 ​​for the connection between the drive motor 2 and the fan 1.

[0053] Furthermore, the sealing gasket 32 ​​has an elastic structure design, and the lower end of the sealing gasket 32 ​​is provided with a hydrophobic groove 321 for draining infiltrated water or impurities.

[0054] Preferably, in this embodiment of the present invention, the sealing gasket 32 ​​is designed with an elastic structure, and the sealing gasket 32 ​​is elastically connected between the fan housing body 11 and the drive motor 2. After installation, due to the compression in the axial direction, the elasticity of the sealing gasket 32 ​​causes its two ends to automatically adhere to the fan housing body 11 and the drive motor 2, respectively, to seal the connection gap between the fan housing body 11 and the drive motor 2, and to form a radial active seal on the motor output shaft 21, thereby improving the automatic sealing performance of the sealing structure and improving the overall performance. The sealing performance of the structure; in the radial direction, due to the limiting effect of the second positioning ring hole 3121 on the sealing gasket 32, the sealing gasket 32 ​​is elastically connected within the second positioning ring hole 3121. Due to the elastic effect of the second positioning ring hole 3121, the sealing gasket 32 ​​will tightly fit within the second positioning ring hole 3121 to form an axial active seal, preventing external moisture or impurities from seeping in through the connection gap between the sealing gasket 32 ​​and the second positioning ring hole 3121, thereby enhancing the sealing performance of the sealing gasket 32; the sealing gasket 32 ​​is provided with a sealing gasket clip for the sealing flange 33 to pass through. The diameter of the sealing gasket hole 322 is larger than the outer diameter of the sealing flange 33, ensuring a non-contact design between the sealing gasket hole 322 and the sealing flange 33. This prevents the sealing gasket 32 ​​from rotating, ensuring that the drainage groove 321 is always positioned at the lower end of the sealing gasket 32 ​​to drain any seeping water or impurities. Simultaneously, the non-contact design between the sealing gasket 32 ​​and the sealing flange 33 effectively prevents external water or impurities from flowing onto the sealing flange 33 through the outer contact surface of the sealing gasket 32. This ensures the sealing performance of the sealing gasket 32 ​​while effectively extending the sealing time. This extends the service life of the sealing flange 33; the drainage groove 321 connects to the sealing gasket hole 322, and the drainage groove 321 is an open structure design to ensure that infiltrated water or impurities cannot remain in the sealing area of ​​the sealing gasket 32, avoiding the expansion and deformation of the sealing gasket 32 ​​or corrosion of metal parts due to the accumulation of water or impurities, significantly improving the long-term reliability of the sealing structure; in addition, the sealing gasket 32 ​​is designed with an elastic structure, so that the sealing gasket 32 ​​can effectively buffer and reset when subjected to external pressure, thereby enhancing the active sealing performance of the sealing gasket 32 ​​and extending the service life of the sealing gasket 32.

[0055] Furthermore, the fan housing body 11 includes a front fan housing 111 and a rear fan housing 112. The front fan housing 111 and the rear fan housing 112 are connected to form a mounting cavity for mounting the impeller 12. The impeller 12 is connected to the motor output shaft 21 within the mounting cavity.

[0056] Preferably, in this embodiment of the present invention, the front housing 111 of the fan is provided with an air inlet 1111 perpendicular to the direction of the impeller 12 and an air outlet 1112 located on the side of the impeller 12. The front housing 111 and the rear housing 112 of the fan are fastened by a threaded connection to improve the convenience of installation and enhance the sealing of the installation cavity, making it easier for gas to enter the fan 1, ensuring that the airflow can flow out evenly, avoiding the formation of eddies, and improving the working efficiency of the fan 1. At the same time, by adopting a split structure design for the fan 1, rapid maintenance can be achieved while ensuring sealing performance. Repairs can be carried out without damaging the overall sealing structure, effectively improving the convenience of maintenance.

[0057] Furthermore, the rear housing 112 of the fan is provided with a central hole 1121 through which the output shaft 21 of the motor passes. The output shaft 21 of the motor passes through the central hole 1121 of the rear housing of the fan and is connected to the impeller 12. The inner diameter of the central hole 1121 of the rear housing of the fan is larger than the outer diameter of the sealing flange 33.

[0058] Preferably, in this embodiment of the present invention, the inner diameter of the central hole 1121 of the fan rear housing is larger than the outer diameter of the sealing flange 33, so that the sealing flange 33 and the fan rear housing 112 are connected without contact. The sealing flange 33 will not rub against the central hole 1121 of the fan rear housing during high-speed rotation, thus effectively extending the service life of the sealing flange 33. At the same time, compared with the traditional solution where the motor output shaft 21 and the fan rear housing 112 adopt an interference fit or a very small clearance fit, the present embodiment of the present invention, with the inner diameter of the central hole 1121 of the fan rear housing being larger than the outer diameter of the sealing flange 33, is easier to install and effectively improves the convenience of connecting the fan 1 and the drive motor 2.

[0059] Furthermore, the drive motor 2 is also provided with a fan mounting hole 24 for connecting the fan housing body 11. The plurality of fan mounting holes 24 are set at equal angles on the outer side of the first boss 221. The fan rear housing 112 is provided with fan rear housing fastening holes 1122 corresponding to the fan mounting holes 24 one by one. The first positioning ring 311 is provided with positioning ring fastening holes 3111 corresponding to the fan mounting holes 24 one by one. The first fastener passes through the fan rear housing fastening holes 1122 and the positioning ring fastening holes 3111, connecting the fan rear housing 112 and the first positioning ring 311 to the fan mounting holes 24.

[0060] Preferably, in this embodiment of the present invention, by equidistantly providing the fan mounting holes 24 on the outer circumference of the first boss 221, the load after the drive motor 2 is connected to the fan rear shell 112 is uniformly transmitted along the circumferential direction, thereby enhancing the stability of the overall structural connection; and in this embodiment of the present invention, the auxiliary positioning function of the first positioning ring 311 effectively limits the first fastener from shifting when subjected to external vibration, thereby enhancing the stability of the overall structural connection.

[0061] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A sealed and protective integrated transmission device for a sweeper truck motor and fan, characterized in that, include: The fan (1) includes a fan housing body (11) and a fan wheel (12). Drive motor (2), the drive motor (2) is provided with a motor output shaft (21) for connecting the wind turbine; A sealing structure is connected between the fan (1) and the drive motor (2), and the sealing structure includes a sealing positioning ring group (31), a sealing gasket (32), and a sealing flange (33). The drive motor (2) is provided with a motor boss structure (22) on the side facing the fan (1), and the sealing positioning ring group (31) is connected to the motor boss structure (22) for sealing; one end of the sealing gasket (32) is connected to the sealing positioning ring group (31), and the other end abuts against the fan housing body (11) for sealing; the sealing flange (33) is connected to the motor output shaft (21), the motor output shaft (21) and the impeller (12) are rotatably connected to the fan housing body (11), and the sealing flange (33) abuts against the impeller (12) and rotates together to seal.

2. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 1, characterized in that, The motor output shaft (21) is provided with a first stepped shaft (211) and a second stepped shaft (212) for limiting the sealing flange (33). The sealing flange (33) is provided with a first sealing flange connection hole (331). The first sealing flange connection hole (331) is provided with a first limiting annular protrusion (332) extending in the direction of the central axis. The first limiting annular protrusion (332) is used to block moisture or impurities from entering the first stepped shaft (211). The end of the first limiting annular protrusion (332) surrounds the second sealing flange connection hole (333). The first sealing flange connection hole (331) and the second sealing flange connection hole (333) are respectively connected to the first stepped shaft (211) and the second stepped shaft (212).

3. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 2, characterized in that, The motor output shaft (21) is also provided with a limiting keyway (213), and the drive motor (2) also includes a limiting key (23) for limiting the sealing flange (33) and the impeller (12); the limiting key (23) is connected in the limiting keyway (213) and cooperates with the first stepped shaft (211) to limit the sealing flange (33).

4. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 3, characterized in that, The wind turbine (12) is provided with a wind turbine connecting groove (121) for limiting the wind turbine (12); the wind turbine (12) is inserted into the limiting key (23) through the wind turbine connecting groove (121) and abuts against the sealing flange (33).

5. The integrated sealed and protected transmission device for a sweeper motor and a blower according to claim 1, characterized in that, The sealing positioning ring assembly (31) includes a first positioning ring (311) and a second positioning ring (312). The motor boss structure (22) is provided with a first boss (221) and a second boss (222). The first positioning ring (311) and the second positioning ring (312) are respectively connected to the first boss (221) and the second boss (222). The sealing gasket (32) is connected inside the second positioning ring (312).

6. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 5, characterized in that, The thickness of the second positioning ring (312) is greater than the thickness of the second boss (222), and the second positioning ring (312) is provided with a second positioning ring hole (3121); the second positioning ring (312) is connected to the second boss (222) through the second positioning ring hole (3121), and the sealing gasket (32) is connected inside the second positioning ring hole (3121).

7. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 1, characterized in that, The sealing gasket (32) is designed with an elastic structure, and the lower end of the sealing gasket (32) is provided with a hydrophobic groove (321) for draining infiltrated water or impurities.

8. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 5, characterized in that, The fan housing body (11) includes a front fan housing (111) and a rear fan housing (112). The front fan housing (111) and the rear fan housing (112) are connected to form a mounting cavity for mounting the impeller (12). The impeller (12) is connected to the motor output shaft (21) in the mounting cavity.

9. The integrated transmission device for sealing and protecting the motor and fan of a sweeper truck according to claim 8, characterized in that, The rear housing (112) of the fan is provided with a central hole (1121) through which the output shaft (21) of the motor passes. The output shaft (21) of the motor passes through the central hole (1121) of the fan housing and is connected to the impeller (12). The inner diameter of the central hole (1121) of the fan housing is larger than the outer diameter of the sealing flange (33).

10. A sealed and protective integrated transmission device for a sweeper motor and a blower according to claim 8, characterized in that, The drive motor (2) is also provided with a fan mounting hole (24) for connecting the fan housing body (11). Multiple fan mounting holes (24) are set at equal angles on the outside of the first boss (221). The fan rear housing (112) is provided with fan rear housing fastening holes (1122) corresponding to the fan mounting holes (24). The first positioning ring (311) is provided with positioning ring fastening holes (3111) corresponding to the fan mounting holes (24). The first fastener passes through the fan rear housing fastening hole (1122) and the positioning ring fastening hole (3111) to connect the fan rear housing (112) and the first positioning ring (311) in the fan mounting hole (24).

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