A power transmission for a wash tank fan

Abstract

The application relates to a power transmission device for a washing and sweeping vehicle fan, which comprises a vehicle body chassis, a power device and a dust suction device; the power device comprises an engine and an output shaft installed on the engine, and a driving wheel is installed on the output shaft; the dust suction device comprises a fan support, a fan installed on the fan support and a fan shaft, and a driven wheel is installed on the fan shaft; the driving wheel and the driven wheel are driven by a belt; the device further comprises a tension transmission device installed on the fan support, which comprises a tension support, a tension wheel and an extension base; the belt is pressed against the outer side of the tension wheel, and the extension base provides the tension wheel with pre-tightening force relative to the belt; the tension wheel adopts a labyrinth sealing structure, which ensures the rotation flexibility of the tension wheel under harsh working conditions; the whole tension transmission device is integrally installed on the fan support, occupies a small space, continuously provides pre-tightening force by using the extension base, and can automatically compensate the elongation of the belt during use.

Description

Technical Field

[0001] This invention belongs to the field of sweeper vehicle technology, specifically relating to a power transmission device for a sweeper vehicle blower. Background Technology

[0002] A sweeper truck is a highly efficient sanitation vehicle that combines the functions of a road sweeper and a high-pressure cleaner. Its dust collection device is usually powered by an engine.

[0003] Most existing sweeper trucks use belt drives to transmit power from the engine to the blower. However, during long-term operation, the belt is prone to loosening, slippage, and jumping, leading to unstable power transmission and affecting dust collection efficiency. Although some existing technologies incorporate tensioning devices, these generally suffer from complex structures, non-adjustable tension, and susceptibility to failure due to dust and wastewater in the operating environment, resulting in high maintenance costs and increased downtime. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of the present invention is to provide a power transmission device for the blower of a sweeper truck, which has a compact structure, stable and reliable tension, and good sealing performance.

[0005] The present invention adopts the following technical solution:

[0006] A power transmission device for a sweeper truck fan includes a vehicle chassis, a power unit mounted on the vehicle chassis, and a dust collection device connected to the power unit.

[0007] The power unit includes an engine and an output shaft mounted on the engine, on which a drive wheel is mounted;

[0008] The dust collection device includes a fan bracket, a fan and a fan shaft mounted on the fan bracket, and a driven wheel mounted on the fan shaft;

[0009] The driving wheel and the driven wheel are connected by a belt drive.

[0010] It also includes a tensioning transmission device, which is installed on the fan support and includes a tensioning bracket, a tensioning wheel and a telescopic seat. The telescopic seat is installed on the fan support, and the tensioning bracket is installed on its telescopic end. One side of the tensioning bracket is slidably installed on the fan support, and the tensioning wheel is rotatably installed on the tensioning bracket and arranged on the side away from the telescopic seat.

[0011] The belt is pressed against the outside of the tensioning pulley, and the telescopic seat provides preload between the tensioning pulley and the belt.

[0012] In a preferred embodiment of the present invention, the tensioning wheel includes a fixed shaft, a hub, a bearing assembly, and a labyrinth seal assembly. The bearing assembly is disposed between the fixed shaft and the hub, and the labyrinth seal assembly is arranged at both ends of the hub and abuts against the bearing assembly.

[0013] In a preferred embodiment of the present invention, the labyrinth sealing assembly includes an inner labyrinth end cap and an outer labyrinth end cap that cooperate with each other. The inner labyrinth end cap is disposed on the hub, and the outer labyrinth end cap is sleeved on the fixed shaft. The outer labyrinth end cap abuts against the inner side of the tensioning bracket.

[0014] In a preferred embodiment of the present invention, the bearing assembly includes a first bearing, a sleeve, and a second bearing disposed on the fixed shaft and abutting against each other in sequence. Both the first bearing and the second bearing are configured as deep groove ball bearings, and the outer ends of the first bearing and the second bearing abut against the labyrinth seal assembly.

[0015] In a preferred embodiment of the present invention, the telescopic seat includes a support part, a compression part and a pressing part, the support part is provided with a receiving cavity, the compression part is placed in the receiving cavity and its upper end protrudes from the support part;

[0016] The crimping part is sleeved on the compression part and fitted into the receiving cavity of the support part, and the crimping part is installed on the tensioning bracket.

[0017] In a preferred embodiment of the present invention, the compression part is configured as multiple sets of spring bodies evenly distributed, the support part is provided with a limiting cavity for the spring body, the pressing part is provided with a pressure cover for the spring body, and a screw is passed through the pressure cover, the screw extending to the tension bracket and fixed thereto.

[0018] In a preferred embodiment of the present invention, a groove is provided on the fan bracket, and a slider is provided on the tensioning bracket. The slider has a T-shaped cross-section and is embedded in the groove and fixed on the tensioning bracket.

[0019] In a preferred embodiment of the present invention, the displacement of the slider is less than the maximum extension of the spring body.

[0020] Beneficial effects:

[0021] The present invention provides a power transmission device for a sweeper blower. By setting a tensioning transmission device on the blower bracket and using a telescopic seat to provide continuous pre-tension to the tensioning wheel, it can automatically compensate for the elongation of the belt during use, always maintain the belt in a suitable tension state, effectively prevent belt slippage and detachment, and significantly improve the stability and reliability of the power transmission.

[0022] The tension wheel of this invention adopts a labyrinth seal structure, which can effectively prevent dust, sewage, debris and other objects generated during the operation of the sweeper from entering the bearing, preventing the bearing from malfunctioning such as wear, corrosion and jamming, ensuring the rotational flexibility of the tension wheel under harsh working conditions and extending its service life.

[0023] The tensioning transmission device of this invention is integrated and installed on the fan bracket, which occupies little space and is easy to assemble and maintain and debug later; the matching structure of the T-shaped slider and the slide groove ensures the smoothness of the tensioning action and prevents it from falling off.

[0024] This invention uses belt drive to effectively buffer the impact and vibration during the transmission process; the tension wheel, through the double bearing and sleeve structure, has balanced force and low friction, which can reduce local wear of the belt, extend the service life of the belt and the entire transmission mechanism, and reduce maintenance costs. Attached Figure Description

[0025] Figure 1 A schematic diagram of the power transmission device for a sweeper truck blower provided by the present invention. Figure 1 ;

[0026] Figure 2 A partial front view of a power transmission device for a sweeper truck blower provided by the present invention;

[0027] Figure 3 A schematic diagram of the power transmission device for a sweeper truck blower provided by the present invention. Figure 2 ;

[0028] Figure 4 This is a half-sectional view of the tensioning wheel and tensioning bracket described in this invention;

[0029] Figure 5 This is a half-sectional view of the tensioning wheel described in this invention;

[0030] Figure 6 This is a schematic diagram of the tensioning transmission device described in this invention.

[0031] In the picture: 1. Vehicle chassis;

[0032] 2. Dust collection device; 21. Fan bracket; 22. Fan; 23. Fan shaft; 24. Driven wheel;

[0033] 3 belts;

[0034] 4 tensioning drive device, 41 tensioning bracket, 42 tensioning wheel, 421 fixed shaft, 422 hub, 423 bearing assembly, 4231 first bearing, 4232 sleeve, 4233 second bearing, 424 labyrinth seal assembly, 4241 inner labyrinth end cap, 4242 outer labyrinth end cap, 43 telescopic seat, 431 support part, 432 compression part, 433 crimping part. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1-6 As shown, a power transmission device for a sweeper blower includes a vehicle chassis 1, a power unit mounted on the vehicle chassis 1, and a dust collection device 2 connected to the power unit.

[0037] The aforementioned power unit includes an engine and an output shaft mounted on the engine, on which a drive wheel is mounted;

[0038] The aforementioned dust collection device 2 includes a fan bracket 21, a fan 22 and a fan shaft 23 mounted on the fan bracket 21, and a driven wheel 24 mounted on the fan shaft 23.

[0039] The aforementioned driving wheel and driven wheel 24 are connected by a belt 3 for transmission.

[0040] It also includes a tensioning transmission device 4, which is installed on the aforementioned fan bracket 21. It includes a tensioning bracket 41, a tensioning wheel 42, and a telescopic seat 43. The telescopic seat 43 is installed on the fan bracket 21, and the tensioning bracket 41 is installed on its telescopic end. One side of the tensioning bracket 41 is slidably installed on the fan bracket 21. The tensioning wheel 42 is rotatably installed on the tensioning bracket 41 and is arranged on the side away from the telescopic seat 43.

[0041] The aforementioned belt 3 presses against the outside of the tensioning pulley 42, and the aforementioned telescopic seat 43 provides preload between the tensioning pulley 42 and the belt 3;

[0042] The working principle and beneficial effects of the above embodiments are as follows:

[0043] When the present invention is working, the engine in the power unit drives the output shaft to rotate, and the driving wheel on the output shaft rotates accordingly. The power is transmitted to the driven wheel 24 on the fan shaft 23 through the belt 3, thereby driving the fan 22 to operate and realize the dust collection operation of the dust collection device 2.

[0044] During transmission, the tensioning transmission device 4, installed on the fan bracket 21, applies a telescopic force to the tensioning bracket 41 via the telescopic seat 43. This causes the tensioning bracket 41 to drive the tensioning pulley 42 to press against the outer side of the belt 3, providing a continuous and stable preload to the belt 3. This ensures that the transmission tension between the driving pulley and the driven pulley 24 remains within a suitable range, preventing the belt 3 from becoming loose, slipping, or jumping during long-term operation, thus ensuring the stability and reliability of the power transmission. Simultaneously, one side of the tensioning bracket 41 slides against the fan bracket 21, allowing it to move smoothly under the drive of the telescopic seat 43, ensuring that the tensioning pulley 42 provides uniform and reliable tension to the belt 3.

[0045] The present invention uses belt 3 to realize the power transmission between the engine and the fan 22. The structure is simple and can effectively buffer the impact and vibration during the transmission process, reduce the noise and wear of parts during the operation of the sweeper, and improve the smoothness of the whole machine operation.

[0046] By setting a tensioning transmission device 4 on the fan bracket 21, the telescopic seat 43 provides continuous pre-tension to the tensioning wheel 42, which can automatically compensate for the elongation of the belt 3 during use, always maintain the belt 3 in a suitable tension state, effectively prevent the belt 3 from slipping or falling off, significantly improve the stability and reliability of power transmission, and ensure the continuous and stable operation of the dust collection device 2.

[0047] The tensioning bracket 41 and the fan bracket 21 slide together, so the tensioning action is smooth and stable. The tensioning wheel 42 exerts uniform pressure on the belt 3, which can reduce local wear on the belt 3, extend the service life of the belt 3 and the entire transmission mechanism, and reduce the maintenance cost and downtime frequency of the sweeper.

[0048] The tensioning transmission device 4 is integrated and installed on the fan bracket 21. It has a compact structure, occupies little space, is highly adaptable, and is easy to assemble and maintain and debug later.

[0049] In one embodiment,

[0050] The tensioning wheel 42 includes a fixed shaft 421, a hub 422, a bearing assembly 423, and a labyrinth seal assembly 424. The bearing assembly 423 is disposed between the fixed shaft 421 and the hub 422, and the labyrinth seal assembly 424 is arranged at both ends of the hub 422 and abuts against the bearing assembly 423.

[0051] The labyrinth seal assembly 424 is arranged at both ends of the hub 422 and abuts against the bearing assembly 423. It can effectively prevent dust, sewage, debris and other objects generated during the operation of the sweeper from entering the bearing assembly 423, preventing the bearing assembly 423 from malfunctioning such as wear, corrosion and jamming, ensuring the rotational flexibility of the tension wheel 42, and thus ensuring the stable operation of the entire tensioning transmission device 4.

[0052] The aforementioned labyrinth sealing assembly 424 includes an inner labyrinth end cap 4241 and an outer labyrinth end cap 4242 that cooperate with each other. The inner labyrinth end cap 4241 is disposed on the hub 422, and the outer labyrinth end cap 4242 is sleeved on the fixed shaft 421. The outer labyrinth end cap 4242 abuts against the inner side of the tensioning bracket 41.

[0053] In one embodiment,

[0054] The bearing assembly 423 includes a first bearing 4231, a sleeve 4232 and a second bearing 4233 disposed on the fixed shaft 421 and abutting against each other in sequence. The first bearing 4231 and the second bearing 4233 are both configured as deep groove ball bearings. The outer ends of the first bearing 4231 and the second bearing 4233 abut against the labyrinth seal assembly 424.

[0055] The bearing assembly 423 adopts a combination structure of a first bearing 4231, a sleeve 4232, and a second bearing 4233. Both the first and second bearings are deep groove ball bearings, which have a low coefficient of friction and good wear resistance, effectively reducing rotational friction and reducing wear on the belt 3 and tensioner 42. At the same time, the sleeve 4232 ensures accurate positioning and balanced force distribution of the two bearings.

[0056] In one embodiment,

[0057] The telescopic seat 43 includes a support part 431, a compression part 432 and a pressing part 433. The support part 431 is provided with a receiving cavity, the compression part 432 is placed in the receiving cavity, and its upper end protrudes from the support part 431.

[0058] The aforementioned crimping part 433 is sleeved on the compression part 432 and fitted into the receiving cavity of the support part 431. The crimping part 433 is installed on the aforementioned tensioning bracket 41.

[0059] The telescopic seat 43 is fixedly installed with the fan bracket 21 through the support part 431. The receiving cavity of the support part 431 provides installation and movement space for the compression part 432 and the crimping part 433. The compression part 432 is placed in the receiving cavity and its upper end protrudes from the support part 431. The crimping part 433 is sleeved on the compression part 432 and fitted into the receiving cavity. At the same time, the crimping part 433 is connected to the tension bracket 41. The telescopic movement of the compression part 432 can drive the crimping part 433 to move synchronously, thereby driving the tension bracket 41 to move.

[0060] Since one side of the tension bracket 41 is slidably engaged with the fan bracket 21, it can move smoothly under the drive of the telescopic seat 43, thereby driving the tension wheel 42, which is rotatably mounted on the tension bracket 41, to press tightly against the outside of the belt 3, providing the belt 3 with a continuous and uniform preload.

[0061] In one embodiment,

[0062] The compression part 432 is configured with multiple evenly distributed spring bodies, which can provide uniform and stable preload. The support part 431 is provided with a limiting cavity for the spring body. The limiting cavity of the support part 431 plays a limiting and guiding role for the spring body, preventing the spring body from deviating when it extends or retracts. The pressing part 433 is provided with a pressure cap for the spring body. A screw is passed through the pressure cap and extends to the tension bracket 41 and is fixed thereto. The pressure cap in the pressing part 433 cooperates with the screw, which not only achieves a firm connection with the tension bracket 41, but also ensures that the extension and retraction force of the spring body is smoothly transmitted to the tension bracket 41.

[0063] In one embodiment,

[0064] A sliding groove is provided on the aforementioned fan bracket 21, and a slider is provided on the aforementioned tension bracket 41 to achieve sliding cooperation between the two. The slider has a T-shaped cross section, and the slider is embedded in the aforementioned sliding groove and fixed on the tension bracket 41. The T-shaped structure can effectively prevent the tension bracket 41 from falling off when sliding, and ensure that the sliding process is stable and controllable.

[0065] In one embodiment,

[0066] The displacement of the slider is less than the maximum extension and contraction of the spring body, ensuring the stability of the tensioning action.

[0067] In summary:

[0068] The present invention provides a power transmission device for a sweeper blower. By setting a tensioning transmission device on the blower bracket and using a telescopic seat to provide continuous pre-tension to the tensioning wheel, it can automatically compensate for the elongation of the belt during use, always maintain the belt in a suitable tension state, effectively prevent belt slippage and detachment, and significantly improve the stability and reliability of the power transmission.

[0069] The tension wheel of this invention adopts a labyrinth seal structure, which can effectively prevent dust, sewage, debris and other objects generated during the operation of the sweeper from entering the bearing, preventing the bearing from malfunctioning such as wear, corrosion and jamming, ensuring the rotational flexibility of the tension wheel under harsh working conditions and extending its service life.

[0070] The tensioning transmission device of this invention is integrated and installed on the fan bracket, which occupies little space and is easy to assemble and maintain and debug later; the matching structure of the T-shaped slider and the slide groove ensures the smoothness of the tensioning action and prevents it from falling off.

[0071] This invention uses belt drive to effectively buffer the impact and vibration during the transmission process; the tension wheel, through the double bearing and sleeve structure, has balanced force and low friction, which can reduce local wear of the belt, extend the service life of the belt and the entire transmission mechanism, and reduce maintenance costs.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the above embodiments are merely illustrative of the technical concept and characteristics of the present invention, intended to enable those skilled in the art to understand and implement the invention, and should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A power transmission device for a sweeper truck blower, characterized in that: It includes a vehicle chassis (1), a power unit mounted on the vehicle chassis (1), and a dust collection device (2) connected to the power unit. The power unit includes an engine and an output shaft mounted on the engine, on which a drive wheel is mounted; The dust collection device (2) includes a fan bracket (21), a fan (22) and a fan shaft (23) mounted on the fan bracket (21), and a driven wheel (24) mounted on the fan shaft (23). The driving wheel and the driven wheel (24) are connected by a belt (3) for transmission; It also includes a tensioning transmission device (4), which is installed on the fan bracket (21), including a tensioning bracket (41), a tensioning wheel (42) and a telescopic seat (43). The telescopic seat (43) is installed on the fan bracket (21), and the tensioning bracket (41) is installed on its telescopic end. One side of the tensioning bracket (41) is slidably installed on the fan bracket (21), and the tensioning wheel (42) is rotatably installed on the tensioning bracket (41) and arranged on the side away from the telescopic seat (43). The belt (3) presses against the outside of the tensioning wheel (42), and the telescopic seat (43) provides preload between the tensioning wheel (42) and the belt (3).

2. The power transmission device for a sweeper blower according to claim 1, characterized in that: The tensioning wheel (42) includes a fixed shaft (421), a hub (422), a bearing assembly (423), and a labyrinth seal assembly (424). The bearing assembly (423) is disposed between the fixed shaft (421) and the hub (422). The labyrinth seal assembly (424) is arranged at both ends of the hub (422) and abuts against the bearing assembly (423).

3. The power transmission device for a sweeper truck blower according to claim 2, characterized in that: The labyrinth sealing assembly (424) includes an inner labyrinth end cap (4241) and an outer labyrinth end cap (4242) that cooperate with each other. The inner labyrinth end cap (4241) is disposed on the hub (422), and the outer labyrinth end cap (4242) is sleeved on the fixed shaft (421). The outer labyrinth end cap (4242) abuts against the inner side of the tensioning bracket (41).

4. A power transmission device for a sweeper truck blower according to claim 2, characterized in that: The bearing assembly (423) includes a first bearing (4231), a sleeve (4232) and a second bearing (4233) disposed on the fixed shaft (421) and abutting each other in sequence. The first bearing (4231) and the second bearing (4233) are both configured as deep groove ball bearings. The outer ends of the first bearing (4231) and the second bearing (4233) abut against the labyrinth seal assembly (424).

5. A power transmission device for a sweeper truck blower according to claim 1, characterized in that: The telescopic seat (43) includes a support part (431), a compression part (432) and a pressing part (433). The support part (431) is provided with a receiving cavity. The compression part (432) is placed in the receiving cavity and its upper end protrudes from the support part (431). The crimping part (433) is sleeved on the compression part (432) and fitted into the receiving cavity of the support part (431), and the crimping part (433) is mounted on the tensioning bracket (41).

6. A power transmission device for a sweeper truck blower according to claim 5, characterized in that: The compression part (432) is configured as multiple sets of spring bodies evenly distributed. The support part (431) is provided with a limiting cavity for the spring body. The pressing part (433) is provided with a pressure cover for the spring body. A screw is passed through the pressure cover. The screw extends to the tension bracket (41) and is fixed thereto.

7. A power transmission device for a sweeper truck blower according to claim 6, characterized in that: A groove is provided on the fan bracket (21), and a slider is provided on the tension bracket (41). The slider has a T-shaped cross section and is embedded in the groove and fixed on the tension bracket (41).

8. A power transmission device for a sweeper truck blower according to claim 7, characterized in that: The displacement of the slider is less than the maximum extension and contraction of the spring body.

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