Large-torque low-noise reduction gearbox and snow melting machine main body structure provided with same

Abstract

According to the large-torque low-noise reduction gearbox and the snow melting machine main body structure provided with the large-torque low-noise reduction gearbox, the structure that two stages of eccentric gears are meshed with an inner gear ring is adopted, so that the output torque is remarkably amplified, the motor power does not need to be increased, and a first driven gear and a second driven gear move in an eccentric mode. The tooth profile of the gear and the inner gear ring always keep continuous multi-point meshing, so that impact force of single-tooth meshing is reduced, eccentric phases of the two stages of rotating frames can be arranged in a staggered mode, vibration waves are offset mutually, low noise can still be kept when the snow melting machine works, and user experience is improved. The inner teeth are directly integrated on the inner wall of the first shell, and an additional gear box is omitted. And the transmission rotating shaft is directly connected with the second-stage rotating frame in a clamping manner, so that a clearance error caused by a coupler is avoided, the space in the axial direction can be compressed, a narrow mounting space of the snow melting machine is adapted, a brushless motor directly drives a driving gear, the transmission loss of a belt or a chain is omitted, and the transmission efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of gearboxes and snow melting machines, and in particular to a high-torque, low-noise gearbox and the main structure of a snow melting machine equipped with it. Background Technology

[0002] Snow melting machines require a power system capable of outputting high torque during operation. Simultaneously, as household or commercial appliances, operating noise levels are a key factor affecting user experience. Therefore, it is crucial to provide snow melting machines with a reduction gear transmission mechanism that can both meet the demands of high torque output and effectively control operating noise.

[0003] Traditional gearboxes, in pursuit of high reduction ratios to obtain large torque, often suffer from problems such as increased gear meshing points, increased linear velocity, and intensified vibration, resulting in significantly increased operating noise. This noise problem is particularly pronounced during the start-up of snow melting machines and during sudden load changes.

[0004] This utility model is based on the above-mentioned circumstances. Utility Model Content

[0005] This utility model overcomes the shortcomings of the prior art and provides a high-torque, low-noise gearbox and the main structure of a snow melting machine equipped with it.

[0006] This utility model is achieved through the following technical solution:

[0007] A high-torque, low-noise gearbox includes a first housing and a transmission shaft. The first housing contains a reduction mechanism capable of driving the transmission shaft to rotate. The first housing also contains a brushless motor capable of driving the reduction mechanism. The reduction mechanism includes a primary rotating frame, a secondary rotating frame, and a ring of internal teeth circumferentially arranged on the inner wall of the first housing. The output shaft of the brushless motor has a driving gear. The primary rotating frame has a first driven gear eccentrically mounted, meshing with the driving gear and rotating around the driving gear along its internal teeth to achieve rotation of the primary rotating frame. A first transmission gear is fixedly connected to the side of the primary rotating frame closest to the secondary rotating frame. The secondary rotating frame has a second driven gear eccentrically mounted, meshing with the first transmission gear and rotating around the first transmission gear along its internal teeth to achieve rotation of the secondary rotating frame. The transmission shaft engages with the secondary rotating frame and rotates with it.

[0008] As described above, in a high-torque, low-noise gearbox, the driving gear, the first transmission gear, and the second driven gear are all made of powder metallurgy, and the first driven gear is made of plastic.

[0009] As described above, in a high-torque, low-noise gearbox, at least two first connecting shafts for rotatably connecting a first driven gear are evenly distributed circumferentially on the first-stage rotating frame, and at least two second connecting shafts for rotatably connecting a second driven gear are evenly distributed circumferentially on the second-stage rotating frame.

[0010] As described above, in a high-torque, low-noise gearbox, both the first connecting shaft and the second connecting shaft are made of metal.

[0011] As described above, a high-torque, low-noise gearbox includes a first housing comprising a bottom shell and an outer cover connected to the bottom shell, wherein the internal gears are disposed on the inner wall of the outer cover.

[0012] The high-torque, low-noise gearbox described above also includes a mounting base, in which the first housing and the brushless motor are disposed, and the transmission shaft extends out from the mounting base.

[0013] This utility model also includes a snow melting machine main structure, which includes the above-mentioned high torque low noise reduction gearbox structure, as well as a base, a loading box connected to the base, and an evaporator connected to the base and extending into the loading box. The loading box is provided with a door for opening, and the loading box is also provided with a discharge port and a valve structure for controlling the opening and closing of the discharge port. The loading box is also provided with a stirring paddle. The high torque low noise reduction gearbox is connected to the base and the transmission shaft is connected to the stirring paddle to drive the stirring paddle to rotate.

[0014] As described above, the main structure of a snow melting machine includes an evaporator with a receiving cavity, a high-torque, low-noise reduction gearbox extending into the receiving cavity, a stirring paddle positioned in front of the evaporator, a drive shaft passing through the evaporator and connected to the stirring paddle, and a stirring frame fitted on the outside of the evaporator, with the stirring paddle and stirring frame fixedly connected.

[0015] As described above, in the main structure of a snow melting machine, the loading box is made of transparent material and has a scale for measuring the volume of the material inside the box.

[0016] As described above, the main structure of a snow melting machine includes a valve structure that can close the discharge port, a handle that is hinged to the loading box and can move the valve core to open the discharge port when rotated, and an elastic element that resets the valve core is provided between the valve core and the loading box.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] This invention employs a two-stage eccentric gear meshing structure with an internal gear ring, significantly amplifying the output torque without increasing motor power. Under eccentric motion, the first and second driven gears maintain continuous multi-point meshing with the internal gear ring, reducing the impact force of single-tooth meshing. The staggered eccentric phases of the two-stage rotating frame allow vibration waves to cancel each other out, maintaining low noise during snow melting machine operation and improving user experience.

[0019] The internal gears are directly integrated into the inner wall of the first housing, eliminating the need for an additional gearbox. The drive shaft is directly connected to the secondary rotating frame via a snap-fit, avoiding clearance errors caused by couplings. This allows for reduced axial space, making it suitable for the confined installation space of snow melting machines. The brushless motor directly drives the drive gear, eliminating belt or chain drive losses and resulting in higher transmission efficiency.

[0020] The driving gear, the first transmission gear, and the second driven gear are all made of powder metallurgy, while the first driven gear is made of plastic. The metal driving gear and the metal first transmission gear ensure stable input power. When the plastic first driven gear meshes with the metal gear, the plastic material can absorb high-frequency impact vibrations, thereby further reducing vibration and noise during transmission. At the same time, the plastic gear has a certain elastic deformation capacity, which can compensate for assembly errors and reduce abnormal noises caused by slight shaft misalignment; it can also reduce the overall weight, reduce rotational inertia, and reduce manufacturing costs; while the metal first transmission gear and the metal second driven gear ensure the transmission of a large torque. Attached Figure Description

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a structural schematic diagram of the high-torque, low-noise gearbox of this utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the high torque, low noise reduction gearbox of this utility model;

[0024] Figure 3 This is an exploded view of the high-torque, low-noise gearbox of this utility model. Figure 1 ;

[0025] Figure 4 This is an exploded view of the high-torque, low-noise gearbox of this utility model. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the structure of the high-torque, low-noise gearbox of this utility model after removing the mounting base;

[0027] Figure 6 yes Figure 5A cross-sectional view taken along section line AA.

[0028] Figure 7 yes Figure 5 A sectional view taken along the BB section line;

[0029] Figure 8 This is an exploded view of the deceleration mechanism of this utility model without the outer cover;

[0030] Figure 9 This is a cross-sectional schematic diagram of the deceleration mechanism in this utility model;

[0031] Figure 10 This is a schematic diagram of the main structure of the snow melting machine in this utility model;

[0032] Figure 11 This is a cross-sectional schematic diagram of the main structure of the snow melting machine in this utility model;

[0033] Figure 12 This is an exploded view of the main structure of the snow melting machine in this utility model;

[0034] Figure 13 This is a schematic diagram of the structure of the stirring paddle and stirring frame in this utility model. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figures 1 to 9 The high-torque, low-noise gearbox shown includes a first housing 1 and a transmission shaft 2. The first housing 1 contains a reduction mechanism that drives the transmission shaft 2 to rotate. The first housing 1 also contains a brushless motor 3 that drives the reduction mechanism. The reduction mechanism includes a primary rotating frame 41, a secondary rotating frame 42, and a ring of internal teeth 11 circumferentially arranged on the inner wall of the first housing 1. The output shaft of the brushless motor 3 is equipped with a drive gear 31. The primary rotating frame 41 has an eccentrically arranged gear that meshes with the drive gear 31 and is driven by the drive gear 31 along its inner edge. The first driven gear 411 rotates around the driving gear 31 to realize the rotation of the first-stage rotating frame 41. The first-stage rotating frame 41 is fixedly connected to the side of the first-stage rotating frame 41 near the second-stage rotating frame 42. The second driven gear 421 is eccentrically arranged on the second-stage rotating frame 42, meshing with the first drive gear 412 and rotating around the first drive gear 412 along the internal teeth 11 under the drive of the first drive gear 412 to realize the rotation of the second-stage rotating frame 42. The transmission shaft 2 is engaged with the second-stage rotating frame 42 and thus rotates with the second-stage rotating frame 42.

[0037] This invention employs a two-stage eccentric gear system that meshes with the internal gear 11, significantly amplifying the output torque without increasing motor power. Under eccentric motion, the first driven gear 411 and the second driven gear 421 maintain continuous multi-point meshing with the internal gear 11, reducing the impact force of single-tooth meshing. The eccentric phases of the two rotating frames can be staggered, allowing vibration waves to cancel each other out, thus maintaining low noise during snow melting machine operation and improving user experience. The internal gear 11 is directly integrated into the inner wall of the first housing 1, eliminating the need for an additional gearbox. The transmission shaft 2 is directly connected to the second-stage rotating frame 42, avoiding clearance errors caused by couplings. This compresses axial space, adapting to the limited installation space of snow melting machines. The brushless motor 3 directly drives the drive gear 31, eliminating belt or chain transmission losses and resulting in higher transmission efficiency.

[0038] Transmission principle: The brushless motor 3 drives the drive gear 31 to rotate, which in turn drives the first driven gear 411 to rotate. When the first driven gear 411 rotates, it rotates along the internal teeth 11 around the output shaft of the brushless motor 3, thereby driving the first-stage rotating frame 41 to rotate. The rotation of the first-stage rotating frame 41 drives the first transmission gear 412 to rotate, which in turn drives the second driven gear 421 to rotate. When the second driven gear 421 rotates, it rotates along the internal teeth 11 around the output shaft of the brushless motor 3, thereby driving the second-stage rotating frame 42 to rotate, which in turn drives the transmission shaft 2 to rotate.

[0039] In one embodiment, the driving gear 31, the first transmission gear 412, and the second driven gear 421 are all made of powder metallurgy, while the first driven gear 411 is made of plastic. The metal driving gear 31 and the metal first transmission gear 412 ensure stable input power. When the plastic first driven gear 411 meshes with the metal gear, the plastic material can absorb high-frequency impact vibrations, thereby further reducing vibration and noise during transmission. At the same time, the plastic gear has a certain elastic deformation capacity, which can compensate for assembly errors and reduce abnormal noise caused by slight shaft misalignment; it can also reduce the overall weight, reduce rotational inertia, and reduce manufacturing costs; the metal first transmission gear 412 and the metal second driven gear 421 ensure the transmission of a large torque.

[0040] Furthermore, the primary rotating frame 41 has at least two circumferentially evenly distributed first connecting shafts 413 for connecting the first driven gear 411, and the secondary rotating frame 42 has at least two circumferentially evenly distributed second connecting shafts 422 for connecting the second driven gear 421. The first connecting shafts 413 can be integrally formed with the primary rotating frame 41, or they can be connected to the primary rotating frame 41 via plug-in or other connecting structures. The second connecting shafts 422 can be integrally formed with the secondary rotating frame 42, or they can be connected to the secondary rotating frame 42 via plug-in or other connecting structures. The optimal configuration is a primary rotating frame 41 with three circumferentially evenly distributed first connecting shafts 413, each rotatably connected to a first driven gear 411, and a secondary rotating frame 42 with three circumferentially evenly distributed second connecting shafts 422, each rotatably connected to a second driven gear 421. Both the first connecting shafts 413 and the second connecting shafts 422 are manufactured using powder metallurgy.

[0041] In one embodiment, the first housing 1 includes a bottom shell 12 and an outer cover 13 connected to the bottom shell 12. The internal teeth 11 are located on the inner wall of the outer cover 13, allowing the reduction mechanism to be smoothly installed inside the first housing 1. The bottom shell 12 and the outer cover 13 can be connected by threaded fasteners or other connection structures. The transmission shaft 2 can be rotatably connected to the outer cover 13 via a first bearing 20 and a retaining ring, thereby preventing the transmission shaft 2 from disengaging from the secondary rotating frame 42. The first bearing 20 can be an oil-impregnated bearing, which reduces noise during operation through sliding friction. Furthermore, the first housing 1 is made of plastic, which provides a certain degree of cushioning against vibrations generated during the operation of the reduction mechanism.

[0042] In one embodiment, the gearbox further includes a mounting base 5, in which the first housing 1 and the brushless motor 3 are disposed, and the transmission shaft 2 extends through the mounting base 5. The mounting base 5 includes a hollow cylindrical shell 51 and an end cap 52 detachably connected to one end of the cylindrical shell 51. The first housing 1 and the brushless motor 3 are connected to the end cap 52 by threaded fasteners or other connection structures. The end cap 52 has a through hole 521 for the transmission shaft 2 to pass through. The other end of the cylindrical shell 51 has a flange 511 for mounting, and the flange 511 has a mounting hole or mounting groove.

[0043] like Figures 10 to 13As shown, this utility model also discloses a main structure of a snow melting machine, which includes the aforementioned high-torque, low-noise reduction gearbox structure. It also includes a base 6, a loading box 7 connected to the base 6, and an evaporator 8 connected to the base 6 and extending into the loading box 7. The loading box 7 has a door 71 for opening, a discharge port 72, and a valve structure 73 for controlling the opening and closing of the discharge port 72. A stirring paddle 83 is also provided inside the loading box 7. The high-torque, low-noise reduction gearbox is connected to the base 6, and the transmission shaft 2 is connected to the stirring paddle 83 to drive the stirring paddle 83 to rotate. The base 6 contains a compressor, condenser, heat dissipation device, control system, and other units.

[0044] Furthermore, the evaporator 8 has a receiving cavity 82, into which the high-torque, low-noise reduction gearbox extends. The stirring paddle 83 is located in front of the evaporator 8, and the drive shaft 2 passes through the evaporator 8 and is connected to the stirring paddle 83. A stirring frame 831 is also fitted around the outside of the evaporator 8, with the stirring paddle 83 fixedly connected to the stirring frame 831. The stirring frame 831 has spiral stirring strips 81, which push the material in the container towards the discharge port 72. The reduction gearbox is enclosed within the evaporator 8 cavity, allowing the working heat to be actively recovered by the refrigeration system, thereby enhancing the service life of the reduction gearbox. The drive shaft 2 is rotatably connected to the upper evaporator 8 via bearings and seals. Furthermore, the stirring paddle 83 and the stirring frame 831 are an integral structure.

[0045] Furthermore, a connecting seat 80 is provided on the front end of the evaporator 8, through which the transmission shaft 2 passes. The connecting seat 80 and the end cover 52 form a two-pole fixation for the transmission shaft 2, thereby reducing the circular runout of the transmission shaft 2 and making the transmission shaft 2 more stable. Furthermore, the transmission shaft 2 is rotatably connected to the connecting seat 80 via a second bearing, and an oil seal structure is also provided between the connecting seat 80 and the transmission shaft 2.

[0046] Furthermore, the filling box 7 is made of transparent material and has a scale 74 on it for measuring the volume of the substance inside the box, so that the volume of the substance inside the filling box 7 can be known.

[0047] In one embodiment, the valve structure 73 includes a valve core 731 capable of closing the discharge port 72, a handle 732 hinged to the loading box 7 and capable of moving the valve core 731 to open the discharge port 72 when rotated, and an elastic element 733 for resetting the valve core 731 between the valve core 731 and the loading box 7. The elastic element 733 may be a return spring.

Claims

1. A large torque low noise reduction gearbox characterized by: The device includes a first housing (1) and a transmission shaft (2). The first housing (1) is equipped with a reduction mechanism that can drive the transmission shaft (2) to rotate. The first housing (1) is also equipped with a brushless motor (3) that can drive the reduction mechanism. The reduction mechanism includes a primary rotating frame (41), a secondary rotating frame (42), and a ring of internal teeth (11) circumferentially arranged on the inner wall of the first housing (1). The output shaft of the brushless motor (3) is equipped with a drive gear (31). The primary rotating frame (41) is eccentrically equipped with a gear that meshes with the drive gear (31) and rotates around the drive gear (11) along the internal teeth (11) under the drive of the drive gear (31). The first driven gear (411) rotates to realize the rotation of the first-stage rotating frame (41). The first-stage rotating frame (41) is fixedly connected to the side of the first-stage rotating frame (41) near the second-stage rotating frame (42). The second-stage rotating frame (42) is eccentrically provided with a second driven gear (421) that meshes with the first drive gear (412) and rotates around the first drive gear (412) along the internal teeth (11) under the drive of the first drive gear (412) to realize the rotation of the second-stage rotating frame (42). The transmission shaft (2) is engaged with the second-stage rotating frame (42) and thus rotates with the second-stage rotating frame (42).

2. A large torque low noise reduction gearbox as claimed in claim 1 characterized in that: The driving gear (31), the first transmission gear (412), and the second driven gear (421) are all made of powder metallurgy, and the first driven gear (411) is made of plastic.

3. A large torque low noise reduction gearbox as claimed in claim 2, characterized in that: The first-stage rotating frame (41) has at least two first connecting shafts (413) evenly distributed circumferentially for rotatably connecting the first driven gear (411), and the second-stage rotating frame (42) has at least two second connecting shafts (422) evenly distributed circumferentially for rotatably connecting the second driven gear (421).

4. A large torque low noise reduction gearbox as claimed in claim 3, characterized in that: Both the first connecting shaft (413) and the second connecting shaft (422) are made of metal.

5. A large torque low noise reduction gearbox according to any one of claims 1 to 4, characterized in that: The first housing (1) includes a bottom shell (12) and an outer cover (13) connected to the bottom shell (12), wherein the inner teeth (11) are provided on the inner wall of the outer cover (13).

6. A large torque low noise reduction gearbox as claimed in claim 5, characterized in that: It also includes a mounting base (5), in which the first housing (1) and the brushless motor (3) are located, and the transmission shaft (2) extends out from the mounting base (5).

7. A snow melter body structure characterized by: The high-torque, low-noise gearbox structure as described in any one of claims 1-6 further includes a base (6), a loading box (7) connected to the base (6), and an evaporator (8) connected to the base (6) and extending into the loading box (7). The loading box (7) is provided with a door (71) for opening it. The loading box (7) is also provided with a discharge port (72) and a valve structure (73) for controlling the opening and closing of the discharge port (72). The loading box (7) is also provided with a stirring paddle (83). The high-torque, low-noise gearbox is connected to the base (6), and the transmission shaft (2) is connected to the stirring paddle (83) to drive the stirring paddle (83) to rotate.

8. A snow melter body structure according to claim 7, characterized in that: The evaporator (8) is internally provided with a containing cavity (82), the large-torque low-noise speed reducer extends into the containing cavity (82), the stirring paddle (83) is arranged at the front of the evaporator (8), the transmission rotating shaft (2) penetrates through the evaporator (8) and is connected to the stirring paddle (83), and the outer side of the evaporator (8) is further sleeved with a stirring frame (831), and the stirring paddle (83) is fixedly connected with the stirring frame (831).

9. A snow melter body structure according to claim 8, wherein: The charging box (7) is made of transparent material and is provided with a scale (74) for measuring the volume of the material in the box.

10. A snow melter body structure according to claim 9, wherein: The valve structure (73) comprises a valve core (731) capable of closing the discharge port (72), a handle (732) hinged to the charging box (7) and capable of driving the valve core (731) to move to open the discharge port (72) when rotating, and an elastic element (733) provided between the valve core (731) and the charging box (7) and capable of resetting the valve core (731).

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