A transmission and a spray gun

Abstract

The present invention belongs to the technical field of transmission, and discloses a transmission and a spray gun, wherein the transmission comprises an input shaft, a first transmission assembly, a second transmission assembly and a coupling sleeve, wherein the first transmission assembly comprises a first rotating shaft, a first fixed gear, a first sun gear, a first planetary gear and a first gear ring, and the second transmission assembly comprises a second rotating shaft, a second fixed gear, a second sun gear, a second planetary gear and a second gear ring, wherein the input shaft, the first rotating shaft and the second rotating shaft are coaxially arranged, and the coupling sleeve is fixedly arranged between the first gear ring and the second gear ring, wherein the first gear ring is movable relative to the first rotating shaft and can mesh with the coupling sleeve or the first fixed gear, and the second gear ring is movable relative to the second rotating shaft and can mesh with the coupling sleeve or the second fixed gear, and the spray gun comprises the above-mentioned transmission. The transmission and the spray gun provided by the present invention reduce space occupation and effectively reduce the overall size of the transmission.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a transmission and a spray gun. Background Art

[0002] At present, in order to further meet the applicability of spray gun equipment under different spraying conditions, the transmission on the spray gun equipment has a certain gear shifting function. In order to ensure the engagement of the driving gear and the driven gear, the input shaft and the output shaft in the traditional transmission structure are arranged at intervals. Such an arrangement will increase the space occupied and the size of the transmission, thereby increasing the overall size of the spray gun structure, which is not easy for relevant personnel to move and place. Summary of the invention

[0003] An object of the present invention is to provide a transmission which can effectively reduce the overall size of the transmission.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A transmission comprises a housing, an input shaft arranged in the housing, a first speed change assembly, a second speed change assembly and a coupling sleeve; wherein:

[0006] The first transmission assembly comprises a first rotating shaft, a first fixed gear and a first sun gear fixedly arranged on the input shaft, a first planetary gear arranged on the first rotating shaft, and a first gear ring movably sleeved on the first rotating shaft, the first rotating shaft is coaxially arranged with the input shaft, and the first planetary gear is meshedly connected with the first sun gear and the first gear ring at the same time;

[0007] The second speed change assembly comprises a second rotating shaft, a second fixed gear and a second sun gear fixedly arranged on the first rotating shaft, a second planetary gear arranged on the second rotating shaft, and a second gear ring movably sleeved on the second rotating shaft, the second rotating shaft is coaxially arranged with the first rotating shaft, and the second planetary gear is meshedly connected with the second sun gear and the second gear ring at the same time;

[0008] The coupling sleeve is fixedly arranged between the first gear ring and the second gear ring, the first gear ring is located between the first fixed gear and the coupling sleeve, the second gear ring is located between the second fixed gear and the coupling sleeve, the first gear ring is movable relative to the first rotating shaft and can be meshed and connected with the first fixed gear or the coupling sleeve respectively, and the second gear ring is movable relative to the second rotating shaft and can be meshed and connected with the second fixed gear or the coupling sleeve respectively.

[0009] Optionally, the first gear ring is provided with a first meshing tooth on the side facing the coupling sleeve, the second gear ring is provided with a second meshing tooth on the side facing the coupling sleeve, the coupling sleeve is correspondingly provided with a third meshing tooth capable of meshing and connecting with the first meshing tooth on the side facing the first gear ring, and the coupling sleeve is correspondingly provided with a fourth meshing tooth capable of meshing and connecting with the second meshing tooth on the side facing the second gear ring.

[0010] Optionally, a shift fork is further included, on which a first shift fork rod and a second shift fork rod are integrally provided, wherein the first shift fork rod can control the movement of the first gear ring, and the second shift fork rod can control the movement of the second gear ring.

[0011] Optionally, a first recessed groove is formed on the outer circumference of the first gear ring, and the end of the first fork rod is located in the first recessed groove; a second recessed groove is formed on the outer circumference of the second gear ring, and the end of the second fork rod is located in the second recessed groove.

[0012] Optionally, the shape of the first fork rod is set to be an arc shape that matches the first sink groove, and the shape of the second fork rod is set to be an arc shape that matches the second sink groove.

[0013] Optionally, a shift driving rod is further included, the shift fork is provided with a screw hole, the shift driving rod is inserted into the screw hole and screwed with the screw hole.

[0014] Optionally, a first plugging groove is formed at one end of the first rotating shaft toward the input shaft, and the corresponding end portion of the input shaft extends into the first plugging groove; a second plugging groove is formed at one end of the second rotating shaft toward the first rotating shaft, and the corresponding end portion of the first rotating shaft extends into the second plugging groove.

[0015] Optionally, it further comprises a power input assembly, which is drivingly connected to the input shaft and can drive the input shaft to rotate.

[0016] Optionally, the power input assembly includes a driving worm wheel and a driving worm, the driving worm wheel is fixedly sleeved on the input shaft, the driving worm is meshingly connected with the driving worm wheel, and the rotation of the driving worm can drive the driving worm wheel to drive the input shaft to rotate.

[0017] A spray gun comprises any one of the transmissions described above.

[0018] Beneficial effects:

[0019] The transmission and spray gun provided by the present invention are fixedly arranged with a coupling sleeve, and the first transmission assembly and the second transmission assembly constitute two speed gears of the transmission. When it is necessary to switch to the gear corresponding to the first transmission assembly, the first gear ring is controlled to move in the direction close to the coupling sleeve, so that the first gear ring is engaged with the coupling sleeve while meshing with the first planetary gear. After the first gear ring is engaged with the coupling sleeve, it stops rotating and remains fixed, and the second gear ring is controlled to slide in the direction away from the coupling sleeve, so that the second gear ring is engaged with the second fixed gear while meshing with the second planetary gear. When torque is input and drives the input shaft to rotate, the first sun gear rotates synchronously with the input shaft, and the first gear ring remains fixed, so that the first sun gear can drive the first rotating shaft to rotate through the first planetary gear, and the second sun gear rotates synchronously with the first rotating shaft. Since the second gear ring is engaged with the second planetary gear and the second fixed gear at the same time, the second gear ring, the second planetary gear and the second fixed gear will be locked and will not rotate relative to each other, so that the first rotating shaft and the second rotating shaft rotate at the same speed, and then the torque after speed change can directly pass through the second rotating shaft, thereby passing through the first transmission assembly The torque after speed change is output; when it is necessary to switch to the gear position corresponding to the second speed change assembly, the first gear ring is controlled to slide in the direction away from the coupling sleeve, so that the first gear ring is meshed with the first fixed gear on the basis of meshing with the first planetary gear, and the second gear ring is controlled to move in the direction close to the coupling sleeve, so that the second gear ring is meshed with the coupling sleeve on the basis of meshing with the second planetary gear. After the second gear ring is meshed with the coupling sleeve, it stops rotating and remains fixed. When the torque is input and drives the input shaft to rotate, the first sun gear rotates synchronously with the input shaft. Since the first gear ring is meshed with the first planetary gear and the first fixed gear at the same time, the first gear ring, the first planetary gear and the first fixed gear will be locked and will not rotate relative to each other, so that the input shaft and the first rotating shaft rotate at the same speed, so that the torque can directly pass through the first rotating shaft. The rotation of the first rotating shaft can make the second sun gear rotate synchronously. Since the second gear ring remains fixed, the second sun gear can drive the second rotating shaft to rotate through the second planetary gear, and then the torque after speed change through the second speed change assembly is output, so that the switching of the two gears of the transmission can be reliably and effectively realized. In addition, the input shaft, the first rotating shaft and the second rotating shaft are coaxially arranged to avoid staggered arrangement of the input shaft, the first transmission assembly and the second transmission assembly, reduce space occupancy, and effectively reduce the overall size of the transmission and the spray gun structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the transmission of the present invention;

[0021] Figure 2 is an exploded schematic diagram of the housing portion of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the internal structure of the transmission of the present invention;

[0023] Figure 4 It is an exploded schematic diagram of the internal structure of the shell of the present invention;

[0024] Figure 5 It is an exploded schematic diagram of the shift fork portion of the present invention;

[0025] Figure 6 It is an exploded schematic diagram of the power input assembly part of the present invention.

[0026] In the figure:

[0027] 100, input shaft; 101, first gasket;

[0028] 210, first rotating shaft; 211, first plug-in slot; 212, first connector; 220, first fixed gear; 230, first sun gear; 240, first planetary gear; 250, first ring gear; 251, first meshing tooth; 252, first sink groove; 213, second gasket;

[0029] 310, second rotating shaft; 311, second plug-in slot; 312, second connector; 320, second fixed gear; 330, second sun gear; 340, second planetary gear; 350, second ring gear; 351, second meshing tooth; 352, second sink groove;

[0030] 410, coupling sleeve; 411, third meshing tooth; 412, fourth meshing tooth; 420, shift fork; 421, first shift fork rod; 422, second shift fork rod; 423, screw connection hole; 424, filling head; 430, shift drive rod; 431, sealing sleeve; 440, shift fork housing;

[0031] 510, driving worm wheel; 520, driving worm; 530, steering impeller; 531, blades; 540, bearing; 600, housing; 610, first housing part; 620, second housing part; 630, sealing ring. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides a transmission, referring to Figures 1 to 4As shown, the transmission includes a housing 600 and an input shaft 100 arranged in the housing 600, a first speed change assembly, a second speed change assembly and a coupling sleeve 410, wherein the first speed change assembly includes a first rotating shaft 210, a first fixed gear 220 and a first sun gear 230 fixedly arranged on the input shaft 100, a first planetary gear 240 arranged on the first rotating shaft 210 and a first ring gear 250 movably sleeved on the first rotating shaft 210, the first rotating shaft 210 is coaxially arranged with the input shaft 100, and the first planetary gear 240 is meshedly connected with the first sun gear 230 and the first ring gear 250 at the same time, the second speed change assembly includes a second rotating shaft 310, a second fixed gear 320 and a second sun gear 330 fixedly arranged on the first rotating shaft 210, and a first planetary gear 240 arranged on the second rotating shaft 310. The two planetary gears 340 and the second ring gear 350 that is movably mounted on the second rotating shaft 310, the second rotating shaft 310 is coaxially arranged with the first rotating shaft 210, the second planetary gear 340 is meshed and connected with the second sun gear 330 and the second ring gear 350 at the same time, the coupling sleeve 410 is fixedly arranged between the first ring gear 250 and the second ring gear 350, the first ring gear 250 is located between the first fixed gear 220 and the coupling sleeve 410, the second ring gear 350 is located between the second fixed gear 320 and the coupling sleeve 410, the first ring gear 250 can move along the axial direction of the first rotating shaft 210 and can also be meshed and connected with the first fixed gear 220 or the coupling sleeve 410 respectively, the second ring gear 350 can move along the axial direction of the second rotating shaft 310 and can also be meshed and connected with the second fixed gear 320 or the coupling sleeve 410 respectively.

[0037] In this embodiment, the input shaft 100, the first rotating shaft 210 and the second rotating shaft 310 are coaxially arranged, so as to avoid the input shaft 100, the first transmission assembly and the second transmission assembly from being staggered, reduce space occupancy, and effectively reduce the overall size of the transmission structure.

[0038] In this embodiment, the coupling sleeve 410 is fixedly arranged, and the first speed change assembly and the second speed change assembly constitute two speed gears of the transmission. Specifically, when it is necessary to switch to the gear corresponding to the first speed change assembly, the first gear ring 250 is controlled to move in the direction close to the coupling sleeve 410, so that the first gear ring 250 is meshed with the coupling sleeve 410 while meshing with the first planetary gear 240. After the first gear ring 250 is meshed with the coupling sleeve 410, it stops rotating and remains fixed, and the second gear ring 350 is controlled to slide in the direction away from the coupling sleeve 410, so that the second gear ring 350 is meshed with the second fixed gear 320 while meshing with the second planetary gear 340. When the torque is input and drives the input shaft 100 to rotate, the first sun gear 230 rotates synchronously with the input shaft 100, and the first sun gear 230 rotates synchronously with the first sun gear 230. The ring gear 250 remains fixed, so that the first sun gear 230 can drive the first rotating shaft 210 to rotate through the first planetary gear 240, and the second sun gear 330 rotates synchronously with the first rotating shaft 210. Since the second ring gear 350 is engaged with the second planetary gear 340 and the second fixed gear 320 at the same time, the second ring gear 350, the second planetary gear 340 and the second fixed gear 320 will be locked and will not rotate relative to each other, so that the first rotating shaft 210 and the second rotating shaft 310 rotate at the same speed, and the torque after the speed change can be directly passed through the second rotating shaft 310, so that the torque after the speed change through the first transmission assembly is output.

[0039] When it is necessary to switch to the gear corresponding to the second speed change assembly, the first gear ring 250 is controlled to slide in the direction away from the coupling sleeve 410, so that the first gear ring 250 is meshed with the first fixed gear 220 on the basis of meshing with the first planetary gear 240, and the second gear ring 350 is controlled to move in the direction close to the coupling sleeve 410, so that the second gear ring 350 is meshed with the coupling sleeve 410 on the basis of meshing with the second planetary gear 340. After the second gear ring 350 is meshed with the coupling sleeve 410, it stops rotating and remains fixed. When torque is input and drives the input shaft 100 to rotate, the first sun gear 230 rotates synchronously with the input shaft 100. Since the first gear ring 250 is meshed with the second planetary gear 340 at the same time, A planetary gear 240 and the first fixed gear 220 are meshed, so the first ring gear 250, the first planetary gear 240 and the first fixed gear 220 are locked and will not rotate relative to each other, so that the input shaft 100 and the first rotating shaft 210 rotate at the same speed, and the torque can be directly passed through the first rotating shaft 210. The rotation of the first rotating shaft 210 can make the second sun gear 330 rotate synchronously. Since the second ring gear 350 remains fixed, the second sun gear 330 can drive the second rotating shaft 310 to rotate through the second planetary gear 340, and then output the torque after the speed change through the second speed change assembly, so that the switching of the two gears of the transmission can be realized reliably and effectively.

[0040] In this embodiment, refer to Figure 2As shown, the housing 600 includes a first housing 610 and a second housing 620. The first housing 610 is provided with a plurality of first connection holes, and the second housing 620 is provided with a plurality of second connection holes. The first connection holes and the second connection holes are connected by a first connection member. The first connection member is preferably a bolt assembly.

[0041] In this embodiment, a sealing ring 630 is further disposed between the first shell 610 and the second shell 620 , and the sealing ring 630 is suitable for reliably sealing the installation gap between the first shell 610 and the second shell 620 when the first shell 610 and the second shell 620 are spliced ​​and connected.

[0042] In this embodiment, refer to Figure 3 , Figure 4 As shown, the first gear ring 250 is provided with a first meshing tooth 251 on the side facing the coupling sleeve 410, the second gear ring 350 is provided with a second meshing tooth 351 on the side facing the coupling sleeve 410, the coupling sleeve 410 is correspondingly provided with a third meshing tooth 411 capable of meshing and connecting with the first meshing tooth 251 on the side facing the first gear ring 250, and the coupling sleeve 410 is correspondingly provided with a fourth meshing tooth 412 capable of meshing and connecting with the second meshing tooth 351 on the side facing the second gear ring 350.

[0043] Further, the first rotating shaft 210 is provided with a first connector 212 protruding from one side close to the input shaft 100, and the first planetary gear 240 is rotatably plugged into the first connector 212. In this embodiment, the number of the first planetary gear 240 and the first connector 212 are both set to three. The second rotating shaft 310 is provided with a second connector 312 protruding from one side close to the first rotating shaft 210, and the second planetary gear 340 is rotatably plugged into the second connector. In this embodiment, the number of the second planetary gear 340 and the second connector 312 are also set to three.

[0044] In this embodiment, the first fixed gear 220 and the first sun gear 230 are integrally arranged on the input shaft 100, the second sun gear 330 is integrally arranged on the first rotating shaft 210, and the second fixed gear 320 is integrally arranged on the second rotating shaft 310. A connecting boss is arranged on one side of the second rotating shaft 310 facing the first rotating shaft 210, and the second connector 312 is arranged on the connecting boss.

[0045] Furthermore, a first plugging slot 211 is formed at one end of the first rotating shaft 210 facing the input shaft 100, and the corresponding end of the input shaft 100 extends into the first plugging slot 211. A second plugging slot 311 is formed at one end of the second rotating shaft 310 facing the first rotating shaft 210, and the corresponding end of the first rotating shaft 210 extends into the second plugging slot 311. This arrangement can make the connection between the input shaft 100, the first rotating shaft 210 and the second rotating shaft 310 more reliable and stable, and can also further reduce the axial dimension to reduce space occupation.

[0046] The fit between the first inserting slot 211 and the input shaft 100 and between the second inserting slot 311 and the first rotating shaft 210 are both set as clearance fit, so that the rotation between the input shaft 100 and the first rotating shaft 210 and between the first rotating shaft 210 and the second rotating shaft 310 do not interfere with each other.

[0047] The plug-in end of the input shaft 100 is sleeved with a first gasket 101, and the plug-in end of the first rotating shaft 210 is sleeved with a second gasket 213. The first gasket 101 and the second gasket 213 can protect the plug-in end of the input shaft 100 and the first rotating shaft 210.

[0048] In this embodiment, refer to Figure 3 , Figure 5As shown, the shift fork 420 is also included. The shift fork 420 is integrally provided with a first fork rod 421 and a second fork rod 422. The first fork rod 421 can control the movement of the first gear ring 250, and the second fork rod 422 can control the movement of the second gear ring 350. In this embodiment, the first fork rod 421 and the second fork rod 422 are integrally provided on the shift fork 420. In this configuration, when the shift fork 420 is controlled to move, the first fork rod 421 and the second fork rod 422 can move synchronously. Specifically, when it is necessary to switch to the gear position corresponding to the first speed change assembly, the shift fork 420 is controlled to move toward the direction close to the second shaft 320, and the first fork rod 421 and the second fork rod 422 simultaneously shift the first gear ring 250 and the second gear ring 350, so that the first gear ring 250 and the second gear ring 350 move toward the second shaft 310 at the same time, so that the first gear ring 250 and the second gear ring 350 can be meshed with the second fixed gear 320 while the first gear ring 250 is meshed with the coupling sleeve 410; when it is necessary to switch to the gear position corresponding to the second speed change assembly, the shift fork 420 is controlled to move toward the direction close to the second shaft 320, and the first fork rod 421 and the second fork rod 422 simultaneously shift the first gear ring 250 and the second gear ring 350, so that the first gear ring 250 and the second gear ring 350 can be meshed with the second fixed gear 320; The input shaft 100 moves in the direction of the first fork rod 421 and the second fork rod 422 respectively shift the first ring gear 250 and the second ring gear 350, so that the first ring gear 250 and the second ring gear 350 move toward the input shaft 100 at the same time, and then the first ring gear 250 can be meshed with the first fixed gear 220 while the second ring gear 350 is meshed with the coupling sleeve 410, so that the gear switching can be completed more conveniently and quickly, and the movement control of the first ring gear 250 and the second ring gear 350 can be achieved simultaneously by moving the shift fork 420 only once, thereby improving the efficiency of the gear shifting operation.

[0049] Furthermore, a first sunken groove 252 is formed on the outer circumference of the first gear ring 250, and the end of the first fork rod 421 is located in the first sunken groove 252. A second sunken groove 352 is formed on the outer circumference of the second gear ring 350, and the end of the second fork rod 422 is located in the second sunken groove 352. By providing the first sunken groove 252 and the second sunken groove 352, when the shift fork 420 performs shift control, the movement of the first fork rod 421 can apply force to the side wall of the first sunken groove 252 to effectively move the first gear ring 250, and the first fork rod 421 will not fall out of the first sunken groove 252 during the shifting process, and the movement of the second fork rod 422 can apply force to the side wall of the second sunken groove 352 to effectively move the second gear ring 350, and the second fork rod 422 will not fall out of the second sunken groove 352 during the shifting process, further ensuring reliable and effective control of the movement of the first gear ring 250 and the second gear ring 350.

[0050] Preferably, the shape of the first fork rod 421 is set to be an arc shape that matches the first sunken groove 252, and the shape of the second fork rod 422 is set to be an arc shape that matches the second sunken groove 352. Such a configuration can further increase the contact area between the first fork rod 421 and the side wall of the first sunken groove 252, and between the second fork rod 422 and the side wall of the second sunken groove 352, and further ensure the effectiveness of the shifting process.

[0051] Furthermore, it also includes a shift driving rod 430, and the shift fork 420 is provided with a screw hole 423, and the shift driving rod 430 is inserted into the screw hole 423 and screwed with the screw hole 423. When performing a shift operation, the operator directly controls the shift driving rod 430 to move by hand to drive the shift fork 420 to move accordingly, so that the operator can perform a reliable shift operation. Optionally, the number of the shift driving rods 430 is set to two, and the two shift driving rods 430 are arranged on opposite sides of the shift fork 420 in the axial direction of the input shaft 100.

[0052] Furthermore, it also includes a fork housing 440, which is disposed on the housing 600, and the shift fork 420 is partially disposed in the fork housing 440. The shift drive rod 430 passes through the fork housing 440 and is screwed to the shift fork 420. The fork housing 440 can provide a reliable installation space for the shift fork 420. The shift drive rod 430 is sleeved with a sealing sleeve 431 at the penetration position, and the sealing sleeve 431 can provide a reliable seal for the gap between the shift drive rod 430 and the fork housing 440 at the penetration position.

[0053] In this embodiment, a plurality of third connection holes are formed on the fork housing 440, and a fourth connection hole is formed on the housing 600 correspondingly, and the third connection holes and the fourth connection holes are connected by a second connection member. The second connection member is preferably a bolt assembly.

[0054] In this embodiment, the shift fork 420 can move in the fork housing 440 along the axial direction of the input shaft 100. The shift fork 420 is protrudingly provided with a filling head 424 corresponding to the inner wall of the fork housing 440. The filling head 424 can fit with the inner wall of the fork housing 440 on the corresponding side to fill the gap between the side end face of the shift fork 420 and the inner wall of the fork housing 440 on the corresponding side, thereby avoiding the shift fork 420 from moving in other directions that is not conducive to the shifting operation, thereby further ensuring the reliability of the shifting process.

[0055] In this embodiment, a power input assembly is further included, and the power input assembly is transmission-connected to the input shaft 100, and the power input assembly can drive the input shaft 100 to rotate. Figure 3 , Figure 6As shown, the power input assembly includes a driving worm wheel 510 and a driving worm 520. The driving worm wheel 510 is fixedly sleeved on the input shaft 100, and the driving worm 520 is meshedly connected with the driving worm wheel 510. The driving worm 520 rotates to drive the driving worm wheel 510 to drive the input shaft 100 to rotate. In this embodiment, the driving worm 520 is rotatably disposed in the housing 600, and a plurality of bearings 540 connected to the housing 600 are sleeved on the driving worm 520, thereby ensuring that the driving worm 520 can rotate reliably in the housing 600.

[0056] The present embodiment also provides a spray gun, which includes a spray gun body and the above-mentioned transmission. In the present embodiment, a power input assembly is provided on the spray gun body, and a steering impeller 530 is fixedly sleeved on the end of the driving worm 520 on the transmission power input assembly. The steering impeller 530 is provided with a plurality of blades 531 protruding along the circumferential direction.

[0057] In this embodiment, the power input assembly on the spray gun body is configured as a steering water spray pipe, and the outlet end of the steering water spray pipe is configured toward the steering impeller 530. The water sprayed from the steering water spray pipe can be sprayed onto the blades 531 of the steering impeller 530, thereby controlling the steering impeller 530 to rotate in a clockwise or counterclockwise direction, thereby causing the driving worm 520 to rotate, and thereby effectively transmitting the torque to the transmission.

[0058] The structures and working principles of the spray gun's steering water spray pipe are all existing technologies, and the application of a transmission on the spray gun will have all the beneficial effects of the transmission as recorded above, so no further elaboration will be given here.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transmission, characterized in that: It comprises a housing (600), an input shaft (100) arranged in the housing (600), a first speed change assembly, a second speed change assembly and a coupling sleeve (410); wherein: The first speed change assembly comprises a first rotating shaft (210), a first fixed gear (220) and a first sun gear (230) fixedly arranged on the input shaft (100), a first planetary gear (240) arranged on the first rotating shaft (210), and a first ring gear (250) movably sleeved on the first rotating shaft (210); the first rotating shaft (210) and the input shaft (100) are coaxially arranged, and the first planetary gear (240) is meshingly connected with the first sun gear (230) and the first ring gear (250); The second speed change assembly comprises a second rotating shaft (310), a second fixed gear (320) and a second sun gear (330) fixedly arranged on the first rotating shaft (210), a second planetary gear (340) arranged on the second rotating shaft (310), and a second ring gear (350) movably sleeved on the second rotating shaft (310); the second rotating shaft (310) is coaxially arranged with the first rotating shaft (210), and the second planetary gear (340) is meshingly connected with the second sun gear (330) and the second ring gear (350); The coupling sleeve (410) is fixedly arranged between the first gear ring (250) and the second gear ring (350); the first gear ring (250) is located between the first fixed gear (220) and the coupling sleeve (410); the second gear ring (350) is located between the second fixed gear (320) and the coupling sleeve (410); the first gear ring (250) can move axially along the first rotating shaft (210) and can mesh with the first fixed gear (220) or the coupling sleeve (410); the second gear ring (350) can move axially along the second rotating shaft (310) and can mesh with the second fixed gear (320) or the coupling sleeve (410); The first gear ring (250) is provided with first meshing teeth (251) on a side facing the coupling sleeve (410), the second gear ring (350) is provided with second meshing teeth (351) on a side facing the coupling sleeve (410), the coupling sleeve (410) is provided with third meshing teeth (411) capable of meshing with the first meshing teeth (251) on a side facing the first gear ring (250), and the coupling sleeve (410) is provided with fourth meshing teeth (412) capable of meshing with the second meshing teeth (351) on a side facing the second gear ring (350); It also includes a shift fork (420), on which a first shift fork rod (421) and a second shift fork rod (422) are integrally provided, the first shift fork rod (421) being capable of controlling the movement of the first gear ring (250), and the second shift fork rod (422) being capable of controlling the movement of the second gear ring (350).

2. The transmission according to claim 1, characterized in that: The outer circumferential surface of the first gear ring (250) is provided with a first recessed groove (252), and the end of the first shift fork rod (421) is located in the first recessed groove (252). The outer circumferential surface of the second gear ring (350) is provided with a second recessed groove (352), and the end of the second shift fork rod (422) is located in the second recessed groove (352).

3. The transmission according to claim 2, characterized in that: The shape of the first shift fork rod (421) is set to be an arc shape that matches the first sink groove (252), and the shape of the second shift fork rod (422) is set to be an arc shape that matches the second sink groove (352).

4. The transmission according to claim 1, characterized in that: It also includes a gear shift driving rod (430), the gear shift fork (420) is provided with a screw hole (423), and the gear shift driving rod (430) is inserted into the screw hole (423) and screwed to the screw hole (423).

5. The transmission according to claim 1, characterized in that: A first plugging slot (211) is formed at one end of the first rotating shaft (210) facing the input shaft (100), and a corresponding end portion of the input shaft (100) extends into the first plugging slot (211); and a second plugging slot (311) is formed at one end of the second rotating shaft (310) facing the first rotating shaft (210), and a corresponding end portion of the first rotating shaft (210) extends into the second plugging slot (311).

6. The transmission according to claim 1, characterized in that: It also comprises a power input component, the power input component is drivingly connected to the input shaft (100), and the power input component can drive the input shaft (100) to rotate.

7. The transmission according to claim 6, characterized in that The power input assembly comprises a driving worm wheel (510) and a driving worm (520); the driving worm wheel (510) is fixedly sleeved on the input shaft (100); the driving worm (520) is meshingly connected with the driving worm wheel (510); the driving worm (520) can drive the driving worm wheel (510) to rotate, thereby driving the input shaft (100) to rotate.

8. A spray gun, characterized in that: A transmission comprising the transmission described in any one of claims 1-7.

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