Gearbox

Abstract

The utility model discloses a gearbox which comprises a driving device. The driving device comprises a driving mechanism and a transmission mechanism which are in transmission connection with each other; a mounting shell is arranged outside the driving mechanism, and the driving mechanism comprises a worm gear rotationally connected to the mounting shell and a worm meshed with the worm gear; the worm gear and the worm are both arranged in the mounting shell, and the worm and the worm gear are both rotationally connected with the mounting shell; and the worm gear is in transmission connection with the transmission mechanism. Due to the fact that speed change is achieved through the worm and gear mechanism, the structure is simple, reliability is high, the reduction ratio is large, and small water flow can drive the device to operate. The worm is sleeved with the water retaining cap, so that water can be prevented from entering the mounting shell from a gap between the worm and the mounting shell, and the worm gear and the worm are prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of sprinkler irrigation equipment, in particular to a gearbox. Background Art

[0002] A spray gun is a device used for soil, crop, plant irrigation or industrial dust removal. One end of the spray gun is connected to a high-pressure water pipe and water is sprayed out through its nozzle.

[0003] The working principle of the existing rotary spray gun is to spray the water flow inside the rotary spray gun through the steering spray pipe, and the water flow sprayed from the steering spray pipe is used as a driving force to impact the water baffle on the spray gun to drive the nozzle to rotate, so that the water flow is sprayed within 360 degrees, which is used for crop and plant irrigation or industrial dust removal. The rotation of this spray gun is intermittent, so the spraying is uneven and it is easy to get stuck.

[0004] Some spray guns use water flow to impact the steering wheel, which rotates the steering wheel to drive the gearbox, and then drives the spray gun to rotate continuously. The gearbox of this spray gun includes a drive device and a speed change device. The steering wheel drives the speed change device through the drive device, and then drives the spray gun to rotate. Since the drive device of this gearbox is driven by multiple sets of gears and has many parts, the structure is complex, prone to failure, and the manufacturing cost is high. At the same time, water flow is easy to flow into the gearbox from the rotating shaft of the drive device, causing damage to the gearbox or failure. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gearbox, which is used to solve the problem that the gearbox currently used in the spray gun has a complex structure and is prone to failure.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A gearbox comprises a drive device; the drive device comprises a drive mechanism and a transmission mechanism which are transmission-connected to each other; a mounting shell is provided outside the drive mechanism, and the drive mechanism comprises a worm wheel arranged in the mounting shell and a worm meshing with the worm wheel; the worm is arranged inside the mounting shell, and the worm and the worm wheel are both rotationally connected to the mounting shell; the worm wheel is transmission-connected to the transmission mechanism.

[0008] Furthermore, it also includes a speed change device; the speed change device includes a transmission shaft connected to the transmission mechanism, a connecting shell sleeved on the outside of the transmission shaft, a carrier gear ring fixedly arranged on the inner surface of the connecting shell, a speed sun gear fixedly arranged on the end of the transmission shaft, a cylindrical output speed change member rotatably connected to the connecting shell, a speed ring fixedly arranged on the inner surface of the output speed change member, and a speed planetary gear rotatably connected to the end face of the output speed change member; the connecting shell is fixedly connected to the mounting shell, and the speed planetary gear is meshed with the carrier gear ring; the speed planetary gear is adapted to the speed sun gear; the speed sun gear is adapted to the speed ring; and the speed sun gear slides along the axis of the output speed change member.

[0009] Furthermore, a cylindrical connecting piece is provided between the output speed changing piece and the connecting shell; the output speed changing piece is rotatably connected to the inner wall of the connecting piece; and the end of the connecting piece is fixedly connected to the end of the connecting shell.

[0010] Furthermore, it also includes a speed regulating device; the speed regulating device is used to drive the transmission shaft to slide inside the connecting shell;

[0011] The speed regulating device includes a speed regulating tube fixedly connected to the side of the connecting shell, a rotating column rotatably connected to the inside of the speed regulating tube, and a speed regulating column fixedly connected to the end of the rotating column; the speed regulating column is eccentrically arranged; a speed regulating wheel is fixedly connected to the middle of the transmission shaft; a speed regulating groove is opened on the cylindrical surface of the speed regulating wheel along the circumference of the speed regulating wheel; the speed regulating column extends into the speed regulating groove.

[0012] Furthermore, a long groove is opened on the side surface of the speed regulating tube along the circumferential direction; a speed regulating rod is fixedly connected to the side surface of the rotating column; the speed regulating rod passes through the long groove and is slidably matched with the long groove.

[0013] Furthermore, at both ends of the long slot, the speed regulating tube is provided with locking holes; the aperture of the locking hole is larger than the slot width of the long slot; a tension spring is provided on the outer surface of the speed regulating rod; one end of the tension spring is fixedly connected to the speed regulating rod; the other end of the tension spring is fixedly connected to a locking rod slidably sleeved with the speed regulating rod; the locking rod is clamped with the locking hole.

[0014] Furthermore, the transmission mechanism includes a transmission member with one end fixedly connected to the worm gear, and the other end of the transmission member is detachably connected to the end of the transmission shaft; the transmission mechanism is connected between the connecting shell and the mounting shell through a bearing shell, and the transmission member is rotatably connected to the bearing shell.

[0015] Furthermore, a groove is axially provided at the end of the transmission member connected to the transmission shaft; a clamping column perpendicular to the transmission shaft is fixedly connected to the end of the transmission shaft connected to the transmission member; the clamping column is slidably fitted in the groove; and the transmission shaft is slidably fitted in the transmission member.

[0016] Furthermore, the end of the worm passes through the mounting shell, extends to the outside of the mounting shell, and is fixedly connected to a steering wheel; a push plate is fixedly arranged on the end surface of the steering wheel along the circumferential direction.

[0017] Furthermore, a bowl-shaped water retaining cap is sleeved on one end of the worm gear close to the steering wheel, and the water retaining cap covers the portion where the worm gear is connected to the mounting shell, and the water retaining cap is fixedly connected to the worm gear.

[0018] The positive effects of the utility model are:

[0019] 1. The utility model is provided with a driving device, which includes a mounting shell, in which a worm and a worm wheel meshing with each other are arranged, a steering wheel is connected to the worm, and a transmission member is connected to the worm wheel. After the water flow hits the push plate on the steering wheel, the steering wheel is driven to rotate, and then the worm wheel and the transmission member are driven to rotate through the worm. Since the speed is changed through the worm gear mechanism, the structure is simple, the reliability is high, the reduction ratio is large, and a small water flow can also drive the utility model to operate. A water retaining cap is mounted on the worm to prevent water from entering the mounting shell from the gap between the worm and the mounting shell, thereby causing damage to the worm wheel.

[0020] 2. The utility model is also provided with a speed change device, which includes a transmission shaft, a speed change sun gear, a speed change planetary gear, a speed change ring gear and an output speed change member, and the transmission shaft is connected to the transmission member. The transmission shaft can be moved left and right by toggling it left and right. When the transmission shaft is moved to the left, the speed change sun gear meshes with the speed change planetary gear. When the transmission shaft is rotated, the output speed change member is rotated through the speed change sun gear and the speed change planetary gear; when the transmission shaft is moved to the right, the speed change sun gear is disengaged from the speed change planetary gear, and the speed change sun gear meshes with the speed change ring gear. When the transmission shaft is rotated, the output speed change member is rotated through the speed change sun gear and the speed change ring gear. The speed change device has a driving structure with two different speeds. In this way, when the transmission shaft is moved left and right, the rotation speed of the output speed change component can be changed, so that the output speed change component has two rotation speeds. The output speed change component is connected to the existing rotary spray gun to rotate the existing spray gun. Finally, the existing rotary spray gun can have two different rotation speeds. The rotation speed of the existing rotary spray gun can be changed according to the needs of the working environment, and there is no need to replace different rotary spray guns.

[0021] 3. The utility model is also provided with a speed regulating device, which includes a speed regulating rod, a speed regulating column, a speed regulating groove, a locking hole, a locking rod, and a tension spring. Using the speed regulating device to move the transmission shaft left and right is more convenient and labor-saving than manually moving the transmission shaft left and right; the speed regulating rod is rotated to rotate the rotating column, so that the speed regulating column rotates in the speed regulating groove, and the speed regulating column is used to apply a force to the speed regulation, so that the transmission shaft moves left and right; using the structure of the locking hole and the locking rod, when the speed regulating rod reaches the end of the long groove, the tension of the tension spring pulls the locking rod into the locking hole. Since the diameter of the end of the locking rod is very small compared to the diameter of the locking hole, when the locking rod slides into the locking hole, the locking hole restricts the locking rod, so that the locking rod cannot easily slide in the long groove. During operation, external uncertain factors are not easy to move the locking rod, that is, external uncertain factors are not easy to move the transmission shaft left and right, reducing the influence of external factors on the transmission shaft, so that the work can be normal.

[0022] 4. The utility model utilizes a power device to drive a transmission mechanism, and then the transmission mechanism drives a driving device, and finally the output transmission member rotates; the utility model is installed on an existing spray gun, the steering wheel is aligned with the steering water spray pipe on the existing spray gun, and the output transmission member is fixedly connected to the transmission rod on the existing spray gun. When the steering water spray pipe of the existing spray gun sprays water to the steering wheel to rotate the steering wheel, the output transmission member is rotated by the driving device and the transmission device, so that the transmission rod on the existing spray gun rotates, and finally the existing spray gun rotates; the rotation speed of the output transmission member can be changed by moving the transmission shaft left and right, that is, the rotation speed of the rotating rod on the existing spray gun is changed, and finally the rotation speed of the existing spray gun is changed; the utility model can make the existing spray gun have two different rotation speeds. When spraying and irrigating different crops, plants or medicines, it is necessary to make the existing spray gun reach different rotation speeds so that the crops, plants or medicines can receive appropriate moisture in unit time, thereby achieving the effect of precise irrigation.

[0023] 5. When spraying and irrigating crops, plants or medicines with relatively weak vitality, the existing spray gun can be adjusted to have a faster rotation speed by adjusting the transmission shaft. This will allow them to receive less water per unit time, which is beneficial for them to absorb water and allow them to grow under favorable conditions. In this way, the rotation speed of the existing spray gun can be changed according to the needs of different types of crops, plants or medicines, so that they can absorb appropriate water and thrive.

[0024] 6. When dealing with different working environments, the utility model only needs to move the transmission shaft to change the rotation speed of the existing spray gun, and there is no need to replace the spray gun, thus saving costs.

[0025] 7. In a working environment with a lot of dust, the existing spray gun needs to be adjusted to a slower rotation speed through the utility model, so that more water can be sprayed on a unit area per unit time, thereby enhancing the dust removal effect; in a working environment with less dust, the existing spray gun needs to be adjusted to a faster rotation speed through the utility model, so that more dust can be sprayed with water per unit time, thereby enhancing the dust removal effect.

[0026] 8. Since the water spray flow rate remains unchanged, when the rotation speed of the existing spray gun is increased, the water spray volume per unit area will be reduced, reducing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model;

[0028] Figure 2 It is a schematic diagram of the connection structure between the speed-changing planetary gear and the output speed-changing member;

[0029] Figure 3 It is a schematic diagram of the connection structure between the speed change ring gear and the speed change planetary gear;

[0030] Figure 4 It is a schematic diagram of the connection structure of the output transmission member, the speed change ring gear and the speed change planetary gear;

[0031] Figure 5 It is a schematic diagram of the connection structure between the speed regulating column and the transmission shaft;

[0032] Figure 6 It is a schematic diagram of the connection structure of the driving mechanism, the transmission mechanism and the speed change device;

[0033] Figure 7 It is a schematic diagram of the connection structure between the card slot and the card column;

[0034] Figure 8 It is a schematic diagram of the structure inside the installation shell;

[0035] Fig. 9 It is a schematic diagram of the structure of the bearing shell and the transmission parts;

[0036] Fig.10 It is a schematic diagram of the connection structure between the tension spring and the speed regulating rod;

[0037] Fig.11 It is a schematic diagram of the plane structure of the long slot and the locking hole;

[0038] In the figure:

[0039] 1. Transmission shaft; 2. Connecting shell; 3. Carrier gear ring; 4. Output transmission member; 5. Variable speed sun gear; 6. Variable speed gear ring; 7. Variable speed planetary gear; 8. Speed ​​regulating wheel; 9. Speed ​​regulating tube; 10. Long slot; 11. Rotating column; 12. Speed ​​regulating rod; 13. Speed ​​regulating column; 14. Speed ​​regulating slot; 15. Locking hole; 16. Tension spring; 17. Locking rod; 18. Mounting shell; 19. Worm gear; 20. Water retaining cap; 21. Worm; 22. Steering wheel; 23. Carrier shell; 24. Transmission member; 27. Slot; 28. Column; 29. ​​Push plate; 30. Connecting member. DETAILED DESCRIPTION

[0040] Example 1

[0041] like Figures 1 to 11 As shown, a gearbox includes a driving device; the driving device includes a driving mechanism and a transmission mechanism that are mutually transmission-connected. The driving mechanism is provided with a mounting shell 18 outside, and the driving mechanism includes a worm wheel 19 disposed in the mounting shell 18 and a worm 21 meshing with the worm wheel 19. The worm 21 is disposed inside the mounting shell 18, and the worm wheel 19 and the worm 21 are both rotationally connected to the mounting shell 18, and the worm wheel 19 is transmission-connected to the transmission mechanism.

[0042] The transmission mechanism is a cylindrical transmission member 24 with one end fixedly connected to the worm wheel 19. The end of the worm 21 passes through the mounting shell 18, extends to the outside of the mounting shell 18, and is fixedly connected to a steering wheel 22; the end surface of the steering wheel 22 is fixedly arranged with a push plate 29 along the circumferential direction.

[0043] After the water flow impacts the push plate 29, it drives the steering wheel 22 to rotate, and then drives the worm 21 to rotate. When the worm 21 rotates, it drives the worm wheel 19 to rotate, and then drives the transmission member 24 to rotate, thereby achieving speed change.

[0044] Example 2

[0045] The difference between this embodiment and embodiment 1 is that:

[0046] A speed change device is added on the basis of Example 1. The speed change device includes a transmission shaft 1 connected to a transmission member, a connection shell 2 sleeved on the outside of the transmission shaft 1, a carrier gear ring 3 fixedly arranged on the inner surface of the connection shell 2, a speed change sun gear 5 fixedly arranged at the end of the transmission shaft 1, a cylindrical output speed change member 4 rotatably connected to the connection shell 2, a speed change ring 6 fixedly arranged on the inner surface of the output speed change member 4, and a speed change planetary gear 7 rotatably connected to the end face of the output speed change member 4. The connection shell 2 is fixedly connected to the mounting shell 18, and the speed change planetary gear 7 is meshed with the carrier gear ring 3. The speed change planetary gear 7 is adapted to the speed change sun gear 5, and the speed change sun gear 5 is adapted to the speed change ring 6, and the speed change sun gear 5 slides along the axis of the output speed change member 4.

[0047] A cylindrical connecting member 30 is provided between the output transmission member 4 and the connecting shell 2 ; the output transmission member 4 is rotatably connected to the inner wall of the connecting member 30 ; and the end of the connecting member 30 is fixedly connected to the end of the connecting shell 2 .

[0048] The utility model is also provided with a speed regulating device, and the speed regulating device is used for driving the transmission shaft 1 to slide inside the connecting shell 2 .

[0049] The speed regulating device comprises a speed regulating tube 9 fixedly connected to the outer wall of the connecting shell 2, a rotating column 11 rotatably connected to the inside of the speed regulating tube 9, and a speed regulating column 13 fixedly connected to the end of the rotating column 11; the speed regulating column 13 is eccentrically arranged; a speed regulating wheel 8 is fixedly connected to the middle of the transmission shaft 1. A speed regulating groove 14 is opened on the cylindrical surface of the speed regulating wheel 8 along the circumference of the speed regulating wheel 8; the speed regulating column 13 extends into the speed regulating groove 14.

[0050] A long groove 10 is formed on the side of the speed regulating tube 9 along the circumferential direction; a speed regulating rod 12 is fixedly connected to the side of the rotating column 11; the speed regulating rod 12 passes through the long groove 10 and is slidably matched with the long groove 10.

[0051] At both ends of the long slot 10, the speed regulating tube 9 is provided with locking holes 15; the aperture of the locking hole 15 is larger than the slot width of the long slot 10; a tension spring 16 is provided on the outer surface of the speed regulating rod 12; one end of the tension spring 16 is fixedly connected to the speed regulating rod 12; the other end of the tension spring 16 is fixedly connected to a locking rod 17 which is slidably sleeved with the speed regulating rod 12; the locking rod 17 is clamped with the locking hole 15.

[0052] One end of the transmission member 24 is fixedly connected to the worm gear 19, and the other end of the transmission member 24 is detachably connected to the end of the transmission shaft 1; the transmission mechanism is connected between the connecting shell 2 and the mounting shell 18 through the bearing shell 23, and the transmission member 24 is rotatably connected to the bearing shell 23.

[0053] A slot 27 is axially provided at the end of the transmission member 24 connected to the transmission shaft 1; a clamping column 28 perpendicular to the transmission shaft 1 is fixedly connected to the end of the transmission shaft 1 connected to the transmission member 24; the clamping column 28 is slidably fitted in the slot 27; the transmission shaft 1 is slidably fitted in the transmission member 24.

[0054] The working process of the utility model is:

[0055] The transmission shaft 1 is turned to the left, and the transmission shaft 1 drives the speed change sun gear 5 to move to the left. The speed change sun gear 5 moves to the middle of the speed change planetary gear 7 and meshes with the speed change planetary gear 7 (there are at least two speed change planetary gears 7). When the transmission shaft 1 is rotated by the driving device, the transmission shaft 1 drives the speed change sun gear 5 to rotate. Since the speed change sun gear 5 is meshed with the speed change planetary gear 7, the speed change sun gear 5 drives the speed change planetary gear 7 to rotate on the carrier gear ring 3. Then, the speed change planetary gear 7 drives the output speed change member 4 to rotate, and finally the effect of rotating the transmission shaft 1 to rotate the output speed change member 4 is achieved. This is a rotation speed of the output speed change member 4.

[0056] When the transmission shaft 1 is turned to the right, the transmission shaft 1 drives the speed sun gear 5 to move to the right, and the speed sun gear 5 moves to the inside of the output transmission part 4 and meshes with the speed ring gear 6. When the transmission shaft 1 is rotated, the transmission shaft 1 drives the speed ring gear 6 to rotate, that is, the transmission shaft 1 drives the output transmission part 4 to rotate, and finally the effect of rotating the transmission shaft 1 to rotate the output transmission part 4 is achieved. This is a rotation speed of the output transmission part 4.

[0057] When the transmission shaft 1 is rotated one circle, if the speed sun gear 5 is meshed with the speed ring gear 6, the output speed change component 4 will rotate one circle. If the speed sun gear 5 is meshed with the speed planetary gear 7, the output speed change component 4 will rotate less than one circle. Therefore, when the transmission shaft 1 is turned to the right (the speed sun gear 5 is meshed with the speed ring gear 6), the rotation speed of the output speed change component 4 is faster than that when the transmission shaft 1 is turned to the left (the speed sun gear 5 is meshed with the speed planetary gear 7). Therefore, the output speed change component 4 in the present technical solution can have two different rotation speeds and can be adjusted.

[0058] By controlling the speed regulating device, the transmission shaft 1 is pushed to move left and right, and the locking rod 17 is pulled outward to disengage the end of the locking rod 17 from the locking hole 15. The tension spring 16 accumulates force and moves the locking rod 17 to make the speed regulating rod 12 slide in the long groove 10, that is, the speed regulating column 13 rotates in the speed regulating tube 9, thereby rotating the speed regulating column 13. Since the speed regulating column 13 extends to the speed regulating groove 14 of the speed regulating wheel 8, the speed regulating column 13 will push the speed regulating wheel 8 to move when it rotates, that is, push the transmission shaft 1 to move.

[0059] The transmission shaft 1 is controlled to rotate through the power device and the transmission mechanism. The steering wheel 22 is turned to rotate the worm 21, the worm 21 drives the worm wheel 19 to rotate, the worm wheel 19 drives the transmission member to rotate, and the transmission member 24 drives the transmission shaft 1 to rotate, and finally the effect of rotating the steering wheel 22 to rotate the transmission shaft 1 is achieved.

[0060] When the speed regulating device is used to control the transmission shaft 1 to move to the left, the clamping column 28 at the left end of the transmission shaft 1 slides to the left in the clamping groove 27, and the left end of the transmission shaft 1 slides to the left in the transmission member 24 (the left end of the transmission shaft 1 will never be out of engagement with the transmission member 24), and the right end of the transmission shaft 1 drives the speed change sun gear 5 to move to the left, and the speed change sun gear 5 moves to the left and engages with the speed change planetary gear 7, and then, the steering wheel 22 of the power device is turned, and the transmission shaft 1 is controlled to rotate through the power device and the transmission mechanism, and the speed change planetary gear 7 at the right end of the transmission shaft 1 rotates to drive the speed change planetary gear 7 to rotate, and the speed change planetary gear 7 rotates and moves on the carrier gear ring 3, and finally the speed change planetary gear 7 drives the output speed change member 4 to rotate.

[0061] When the speed regulating device is used to control the transmission shaft 1 to move to the right, the clamping column 28 at the left end of the transmission shaft 1 slides to the right in the clamping groove 27, and the left end of the transmission shaft 1 slides to the right in the transmission member 24 (the left end of the transmission shaft 1 will never be disengaged from the transmission member 24), and the right end of the transmission shaft 1 drives the speed change sun gear 5 to move to the right. After moving to the right, the speed change sun gear 5 disengages from the speed change planetary gear 7, and the speed change sun gear 5 moves to the right into the output transmission member 4, and engages with the speed change ring gear 6 inside the output transmission member 4, and then the steering wheel 22 of the power unit is turned, and the transmission shaft 1 is controlled to rotate through the power unit and the transmission mechanism, and the speed change sun gear 5 at the right end of the transmission shaft 1 drives the speed change ring gear 6 to rotate, that is, the speed change sun gear 5 drives the output transmission member 4 to rotate.

[0062] The structure of the technical solution can be installed on an existing spray gun through a connecting member 30, the utility model is installed on the existing spray gun, the steering wheel 22 is aligned with the steering water spray pipe on the existing spray gun, the output speed change member 4 is fixedly connected to the transmission rod on the existing spray gun, when the steering water spray pipe of the existing spray gun sprays water to the steering wheel 22 to rotate the steering wheel 22, the output speed change member 4 is rotated through the power device, the transmission mechanism, and the drive device, so that the transmission rod on the existing spray gun is rotated, and finally the existing spray gun is rotated;

[0063] The rotation speed of the output transmission member 4 can be changed by moving the transmission shaft 1 left and right, that is, the rotation speed of the rotating rod on the existing spray gun can be changed, and finally the rotation speed of the existing spray gun can be changed;

[0064] It should be particularly noted that: through the utility model, the existing spray gun can have two different rotation speeds. When spraying and irrigating different crops, plants or medicines, the existing spray gun needs to reach different rotation speeds so that the crops, plants or medicines can receive appropriate moisture per unit time, thereby achieving the effect of precise irrigation and saving water resources.

[0065] Under the condition that the carrier gear ring 3 and the speed planetary gear 7 are normally meshed, the speed planetary gear 7 and the speed sun gear 5 are normally meshed, and the speed sun gear 5 and the speed gear ring 6 are normally meshed, the above parts can have any number of teeth within the range of the number of teeth of the worm gear 19, the carrier gear ring 3, the speed planetary gear 7, the speed sun gear 5, and the speed gear ring 6.

[0066] By utilizing the structure of the clamping groove 27 and the clamping column 28 , the transmission shaft 1 can slide left and right in the transmission member 24 , and the transmission member 27 can also drive the transmission shaft 1 to rotate.

[0067] The push plate 29 is used to receive the force of the water flow sprayed from the steering water spray pipe of the existing spray gun, so that the steering wheel 22 can be rotated by the impact of the water flow.

[0068] The connecting piece is used to connect the utility model to the existing spray gun.

[0069] The eccentric setting of the speed regulating column 13 means that the axis of the speed regulating column 13 and the axis of the rotating column 11 are no longer on the same straight line.

[0070] Example 3

[0071] The difference between this embodiment and embodiment 2 is that:

[0072] The worm 21 is provided with a bowl-shaped water retaining cap 20 at the end thereof. The water retaining cap 20 covers the portion where the worm 21 is connected to the mounting shell 18 . The water retaining cap 20 is located between the mounting shell 18 and the steering wheel 22 .

[0073] When the water flow hits the push plate 29 on the steering wheel 22, it will splash everywhere. The water retaining cap 20 rotates with the worm 21, thereby blocking the splashing water and throwing it out under the action of centrifugal force, thereby preventing the splashing water from entering the interior of the mounting shell 18 through the gap between the worm 21 and the mounting shell 18, causing damage to the transmission parts inside the utility model.

[0074] The above-mentioned embodiments are described in detail and specifically, and express the preferred embodiments of the utility model. They are only used to illustrate the technical ideas and features of the utility model. The purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly, but they are not limited to the utility model. The patent scope of the utility model cannot be limited only by this embodiment. That is, all equivalent changes or modifications made to the spirit disclosed by the utility model, for researchers or technicians in this field, within the structure of the utility model, the local improvements within the system and the changes and transformations between subsystems are still within the patent scope of the utility model. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including intellectual property risk warning surveys.

Claims

1. A gearbox, characterized in that: including a drive device; The driving device comprises a driving mechanism and a transmission mechanism which are connected to each other in a transmission manner; a mounting shell (18) is provided outside the driving mechanism, and the driving mechanism comprises a worm wheel (19) arranged inside the mounting shell (18) and a worm (21) meshing with the worm wheel (19); the worm wheel (21) is arranged inside the mounting shell (18), and the worm wheel (21) and the worm wheel (19) are both rotatably connected to the mounting shell (18); the worm wheel (19) is in a transmission connection with the transmission mechanism; The end of the worm (21) passes through the mounting shell (18), extends to the outside of the mounting shell (18), and is fixedly connected to a steering wheel (22); a push plate (29) is fixedly arranged on the end surface of the steering wheel (22) along the circumferential direction; The worm (21) is provided with a bowl-shaped water retaining cap (20) at one end close to the steering wheel (22). The water retaining cap (20) covers the portion where the worm (21) is connected to the mounting shell (18). The water retaining cap (20) is fixedly connected to the worm (21).

2. The gearbox according to claim 1, characterized in that: Also includes a speed change device; The speed change device comprises a transmission shaft (1) connected to a transmission mechanism, a connection shell (2) sleeved on the outside of the transmission shaft (1), a carrier gear ring (3) fixedly arranged on the inner surface of the connection shell (2), a speed change sun gear (5) fixedly arranged at the end of the transmission shaft (1), a cylindrical output speed change member (4) rotatably connected to the connection shell (2), a speed change ring (6) fixedly arranged on the inner surface of the output speed change member (4), and a speed change planetary gear (7) rotatably connected to the end surface of the output speed change member (4); the connection shell (2) is fixedly connected to the mounting shell (18), the speed change planetary gear (7) meshes with the carrier gear ring (3); the speed change planetary gear (7) is matched with the speed change sun gear (5); the speed change sun gear (5) is matched with the speed change ring (6); and the speed change sun gear (5) slides along the axis of the output speed change member (4).

3. The gearbox according to claim 2, characterized in that: A cylindrical connecting piece (30) is provided between the output speed changing piece (4) and the connecting shell (2); the output speed changing piece (4) is rotatably connected to the inner wall of the connecting piece (30); and the end of the connecting piece (30) is fixedly connected to the end of the connecting shell (2).

4. The gearbox according to claim 2, characterized in that: It also includes a speed regulating device; the speed regulating device is used to drive the transmission shaft (1) to slide inside the connecting shell (2); The speed regulating device comprises a speed regulating tube (9) fixedly connected to the side of the connecting shell (2), a rotating column (11) rotatably connected to the inside of the speed regulating tube (9), and a speed regulating column (13) fixedly connected to the end of the rotating column (11); the speed regulating column (13) is eccentrically arranged; a speed regulating wheel (8) is fixedly connected to the middle of the transmission shaft (1); a speed regulating groove (14) is formed on the cylindrical surface of the speed regulating wheel (8) along the circumference of the speed regulating wheel (8); and the speed regulating column (13) extends into the speed regulating groove (14).

5. The gearbox according to claim 4, characterized in that: The side surface of the speed regulating tube (9) is provided with a long groove (10) along the circumferential direction; the side surface of the rotating column (11) is fixedly connected with a speed regulating rod (12); the speed regulating rod (12) passes through the long groove (10) and is slidably matched with the long groove (10).

6. The gearbox according to claim 5, characterized in that: The speed regulating tube (9) is provided with locking holes (15) at both ends of the long slot (10); the diameter of the locking hole (15) is larger than the slot width of the long slot (10); a tension spring (16) is provided on the outer surface of the speed regulating rod (12); one end of the tension spring (16) is fixedly connected to the speed regulating rod (12); the other end of the tension spring (16) is fixedly connected to a locking rod (17) which is slidably sleeved with the speed regulating rod (12); and the locking rod (17) is snap-fitted with the locking hole (15).

7. The gearbox according to claim 2, characterized in that: The transmission mechanism comprises a transmission member (24) having one end fixedly connected to the worm gear (19), and the other end of the transmission member (24) being detachably connected to the end of the transmission shaft (1); the transmission mechanism is connected between the connection shell (2) and the mounting shell (18) via a bearing shell (23), and the transmission member (24) is rotationally connected to the bearing shell (23).

8. The gearbox according to claim 7, characterized in that: The end of the transmission member (24) connected to the transmission shaft (1) is provided with a slot (27) along the axial direction; the end of the transmission shaft (1) connected to the transmission member (24) is fixedly connected with a slot column (28) perpendicular to the transmission shaft (1); the slot column (28) is slidably engaged with the slot (27); the transmission shaft (1) is slidably engaged with the transmission member (24).

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