Worm gear reduction gearbox

Abstract

The invention provides a worm gear reduction gearbox. Helical teeth of a worm are meshed with tooth grooves of a worm gear, a first working face and a second working face are formed in the axial direction of the worm, and the first working face and the second working face are located on the two sides of the helical teeth correspondingly; the oil spraying assembly comprises a first oil spraying nozzle and a second oil spraying nozzle, a spraying opening of the first oil spraying nozzle points to the first working face, and a spraying opening of the second oil spraying nozzle points to the second working face; the oil supply assembly is in power connection with the worm through the transmission part, and the oil supply assembly sucks lubricating oil in the reduction gearbox and sends the lubricating oil to the first oil spray nozzle or the second oil spray nozzle; the oil inlet end of the oil distribution assembly is connected with the oil outlet end of the oil supply assembly, and the oil distribution assembly is provided with two oil outlets which are connected with the first oil spray nozzle and the second oil spray nozzle correspondingly; when the worm rotates in the forward direction, the first oil nozzle is opened, and the second oil nozzle is closed; and when the worm rotates reversely, the first oil spray nozzle is closed, the second oil spray nozzle starts, and precise lubrication of the meshing position is achieved.

Description

Technical Field

[0001] This application relates to the field of gearboxes, and more particularly to a worm gear gearbox. Background Technology

[0002] Worm gear reducers are a common type of power transmission mechanism, mainly used to reduce output speed and increase output torque to meet the drive requirements of various industrial equipment.

[0003] During operation, the helical teeth of the worm drive the worm wheel to rotate, thereby achieving the purpose of deceleration and torque increase.

[0004] In this system, the surface on which the helical teeth of the worm mesh with the tooth grooves of the worm wheel to push against the worm is the working surface, while the other side is the non-working surface. During operation, the working surface bears the pushing load, and an oil film needs to be formed at the working surface to reduce wear during the meshing process of the worm wheel and worm. Since the worm can switch between forward and reverse rotation, when the direction of rotation of the worm changes, the working surface and the non-working surface also switch, and the wear position of the worm wheel and worm changes. Therefore, the lubrication at the meshing position needs to be adjusted accordingly.

[0005] In the existing technology, the lubrication method of worm gear reducers is splash lubrication or oil immersion lubrication. However, neither of these lubrication methods can accurately lubricate the meshing position according to the direction of the worm's rotation, thus affecting the lubrication effect at the meshing position.

[0006] Therefore, how to design a gearbox that improves the lubrication effect at the meshing position of the worm gear has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] This application provides a worm gear reducer to at least solve the above-mentioned technical problems existing in the prior art.

[0008] A worm gear reducer is provided, including a worm and a worm wheel. The helical teeth of the worm mesh with the tooth grooves of the worm wheel and form a first working surface and a second working surface in the axial direction of the worm. The first working surface and the second working surface are located on both sides of the helical teeth, respectively. The fuel injection assembly includes a first fuel injector and a second fuel injector, wherein the nozzle of the first fuel injector points towards a first working surface and the nozzle of the second fuel injector points towards a second working surface. The oil supply assembly and the transmission component are connected to the worm gear through the transmission component. The oil supply assembly draws lubricating oil from the gearbox and delivers it to the first or second oil injector. The oil distributor assembly has an inlet end connected to the outlet end of the oil supply assembly. The oil distributor assembly has two outlets, which are respectively connected to the first and second fuel injectors. When the worm rotates in the forward direction, the first fuel injector opens and the second fuel injector closes. When the worm rotates in the reverse direction, the first fuel injector closes and the second fuel injector opens.

[0009] In one embodiment, the oil supply assembly includes a pump housing, a drive gear, and a driven gear. The drive gear and the driven gear mesh with each other and are disposed within the pump chamber of the pump housing. The drive gear and the driven gear divide the pump chamber into a first chamber and a second chamber. The pump housing is provided with a first oil inlet pipe and a second oil outlet pipe communicating with the first chamber. The pump housing is also provided with a second oil inlet pipe and a first oil outlet pipe communicating with the second chamber. The first oil outlet pipe is connected to a first fuel injector, and the second oil outlet pipe is connected to a second fuel injector. When the worm rotates in the forward direction, the first oil inlet pipe and the first oil outlet pipe are open, and the second oil inlet pipe and the second oil outlet pipe are closed. When the worm rotates in the reverse direction, the first oil inlet pipe and the first oil outlet pipe are closed, and the second oil inlet pipe and the second oil outlet pipe are open.

[0010] In one embodiment, both the first oil inlet pipe and the second oil inlet pipe extend below the lubricating oil level in the gearbox. A first check valve and a second check valve are respectively installed on the first oil inlet pipe and the second oil inlet pipe. When the worm rotates in the forward direction, the first check valve opens and the second check valve closes. When the worm rotates in the reverse direction, the first check valve closes and the second check valve opens.

[0011] In one embodiment, the system includes a housing, a support seat is provided in the inner cavity of the housing, the pump housing is fixedly mounted on the support seat, and the support seat is provided with a first oil suction channel and a second oil suction channel extending below the lubricating oil surface. The first oil suction channel is connected to a first oil inlet pipe, and the second oil suction channel is connected to a second oil inlet pipe.

[0012] In one embodiment, the transmission component includes a driving bevel gear and a driven bevel gear. The driving bevel gear is fixedly mounted on the worm gear, and the driven bevel gear is fixedly mounted on the driving gear. The driving bevel gear and the driven bevel gear mesh with each other.

[0013] In one embodiment, the oil distribution assembly includes an oil distribution pipe and an oil distribution valve; An oil distribution chamber is provided inside the oil distribution pipe. A first oil outlet and a second oil outlet are provided on the side wall of the oil distribution pipe, which are connected to the oil distribution chamber. The first oil outlet is connected to the first fuel injector, and the second oil outlet is connected to the second fuel injector. The oil distribution valve is slidably installed in the oil distribution chamber so that one of the first oil outlet and the second oil outlet is opened and the other is closed.

[0014] In one embodiment, the first oil outlet pipe and the second oil outlet pipe are connected to the oil distribution chamber and are located on both sides of the oil distribution valve; when the worm rotates in the forward direction, the oil distribution valve moves to the side of the second oil outlet, disconnecting the second oil outlet from the second oil outlet pipe, and connecting the first oil outlet to the first oil outlet pipe; when the worm rotates in the reverse direction, the oil distribution valve moves to the side of the first oil outlet, connecting the second oil outlet to the second oil outlet pipe, and disconnecting the first oil outlet from the first oil outlet pipe.

[0015] In one embodiment, a first buffer chamber and a second buffer chamber are respectively provided on both sides of the oil distribution chamber. The first buffer chamber is located on the side of the first oil outlet and is connected to the oil distribution chamber through a first through hole. The second buffer chamber is located on the side of the second oil outlet and is connected to the oil distribution chamber through a second through hole. A first sealing post and a second sealing post are respectively provided on the two end walls of the oil distribution valve. When the worm rotates in the forward direction, the second sealing post is inserted into the second through hole to close the second through hole. When the worm rotates in the reverse direction, the first sealing post is inserted into the first through hole to close the first through hole.

[0016] In one embodiment, a first fuel injector is installed on a fuel distribution pipe and communicates with a first fuel outlet, and a second fuel injector is installed on a fuel distribution pipe and communicates with a second fuel outlet.

[0017] In one embodiment, the system further includes a housing, with an oil distribution pipe fixedly installed in the inner cavity of the housing. The extension direction of the oil distribution pipe is consistent with the axial direction of the worm gear. Several first and second oil injectors are provided and distributed along the axial direction of the worm gear.

[0018] Compared with the prior art, the worm gear reducer of this application has the following advantages: This application transmits the power of the worm gear to the oil supply assembly through a transmission component. The oil supply assembly draws lubricating oil from the bottom of the gearbox and sprays the lubricant towards the meshing position of the helical teeth and tooth grooves, thereby achieving lubrication of the contact position between the worm gear and the worm wheel. At the same time, it removes heat from the contact position and reduces the risk of gearbox aging. The oil supply assembly controls the flow path of the lubricating oil according to the rotation direction of the worm, so that the lubricating oil is sprayed from a single first or second oil injector to precisely lubricate the working surface at the meshing position of the helical teeth and tooth grooves, improve the lubrication accuracy of the worm gear meshing position, and reduce the risk of wear, aging and galling of the working surface.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0020] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0021] Figure 1 A schematic diagram of the prior art is shown; Figure 2 A schematic diagram of the overall structure of this application is shown; Figure 3 A schematic diagram of the internal structure of this application is shown; Figure 4 A schematic diagram of lubrication at the worm gear meshing position is shown in this application; Figure 5 A partial sectional view of this application is shown; Figure 6 A schematic diagram of the oil supply assembly of this application is shown; Figure 7 A cross-sectional view of the oil supply assembly of this application is shown; Figure 8 A schematic diagram of the lubricating oil flow in this application is shown; Figure 9 A partial unfolded schematic diagram of this application is shown; Figure 10 A cross-sectional view of the oil separation assembly of this application is shown; Figure 11 A schematic diagram of the oil supply component installation according to this application is shown.

[0022] Explanation of the labels in the diagram: 10. Shell; 100. Support; 101. First working surface; 102. Second working surface; 1001. First oil suction channel; 1002. Second oil suction channel; 1. Worm gear; 11. Helical gear; 2. Worm gear; 21. Gear groove; 3. Fuel injection assembly; 31. First fuel injector; 32. Second fuel injector; 4. Oil supply assembly; 40. Pump chamber; 401. First chamber; 402. Second chamber; 41. Pump housing; 42. Drive gear; 43. Driven gear; 44. First oil inlet pipe; 45. Second oil outlet pipe; 46. Second oil inlet pipe; 47. First oil outlet pipe; 48. First check valve; 49. Second check valve; 5. Transmission components; 51. Driving bevel gear; 52. Driven bevel gear; 6. Oil distribution assembly; 61. Oil distribution pipe; 611. Oil distribution chamber; 612. First buffer chamber; 613. Second buffer chamber; 614. First through hole; 615. Second through hole; 62. Oil distribution valve; 621. First sealing column; 622. Second sealing column; 631. First oil outlet; 632. Second oil outlet. Detailed Implementation

[0023] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Example 1: like Figure 2 As shown, the gearbox includes a housing 10, a worm 1, and a worm wheel 2. Both the worm wheel 2 and the worm 1 are mounted on the housing 10 via bearings. The axis of the worm 1 is perpendicular to the axis of the worm wheel 2. Figure 1 As shown, the worm 1 is provided with helical teeth 11, and the worm wheel 2 is provided with a number of tooth grooves 21 on its peripheral wall. The helical teeth 11 and the tooth grooves 21 mesh with each other. When the worm 1 rotates, the helical teeth 11 rotate around the axis of the worm 1, thereby pushing the worm wheel 2 to rotate, thus realizing the transmission of power.

[0025] In the prior art, the worm gear 1 has two states: forward rotation and reverse rotation, which enables the switching of the output power transmission direction.

[0026] like Figure 1 As shown, when the helical tooth 11 meshes with the tooth groove 21, there are two contact surfaces. Here, the two contact surfaces are defined as the first working surface 101 and the second working surface 102. The first working surface 101 and the second working surface 102 are located within the same tooth groove 21 and on opposite sides of the helical tooth 11. (Refer to...) Figure 1 As shown, when the worm 1 rotates in the forward direction, the worm wheel 2 rotates clockwise. At this time, the first working surface 101 is the force-bearing surface, bearing the meshing force between the worm wheel 2 and the worm 1. When the worm 1 rotates in the reverse direction, the worm wheel 2 rotates counterclockwise, and the second working surface 102 is subjected to force.

[0027] It can be clearly seen here that when the direction of rotation of the worm 1 changes, the force-bearing surface on the tooth groove 21 also changes accordingly.

[0028] In existing worm gear reducers, lubrication is typically achieved through immersion lubrication, splash lubrication, or pressure lubrication. However, none of these methods can accurately lubricate the stress points according to the rotation direction of the worm gear 1, and therefore require improvement.

[0029] Therefore, as Figure 3 and Figure 4 As shown, an oil injection assembly 3 is provided in the inner cavity of the housing 10. The oil injection assembly 3 includes a first oil injector 31 and a second oil injector 32. The nozzle direction of the first oil injector 31 is directed towards the first working surface 101, and the nozzle direction of the second oil injector 32 is directed towards the second working surface 102. It also includes an oil supply assembly 4 and a transmission component 5. Specifically, the oil supply assembly 4 is poweredly connected to the worm gear 1 through the transmission component 5. The oil supply assembly 4 draws lubricating oil from the gearbox and pumps it to the oil injection assembly 3, thereby spraying the lubricating oil to the position where the helical gear 11 meshes with the tooth groove 21.

[0030] Specifically, the oil inlet of the oil supply assembly 4 extends below the lubricating oil level in the gearbox, and the oil outlet of the oil supply assembly 4 is connected to the oil injection assembly 3.

[0031] In this embodiment, both the first oil injector 31 and the second oil injector 32 are equipped with an electronic control switch. The gearbox is equipped with a sensor that monitors the rotation direction of the worm gear 2. When the worm 1 rotates in the forward direction, the electronic control switch controls the first oil injector 31 to open and the second oil injector 32 to close, thereby spraying lubricating oil onto the first working surface 101. When the worm 1 rotates in the reverse direction, the electronic control switch controls the first oil injector 31 to close and the second oil injector 32 to open, thereby spraying lubricating oil onto the second working surface 102, thus realizing the switching of lubrication position.

[0032] Example 2: In Example 1, the first fuel injector 31 and the second fuel injector 32 are switched by electronic control. The internal environment of the gearbox is poor, and the sensor is prone to failure, which not only increases the cost, but also affects the stability of the gearbox lubrication.

[0033] Therefore, in this embodiment, further improvements have been made, and an oil distribution component 6 is also provided to link the oil distribution component 6, the oil supply component 4 and the oil injection component 3 together, so as to accurately determine the rotation direction of the worm gear 1 and regulate the oil injection state of the first oil injector 31 and the second oil injector 32.

[0034] Specifically, in the prior art, the oil supply assembly 4 typically uses a gear pump to pump lubricating oil. In this application, the gear pump is improved and connected to the worm gear 1 via a transmission component 5, achieving lubricating oil pumping without introducing a new power source.

[0035] Among them, such as Figure 5 and Figure 6 As shown, the oil supply assembly 4 includes a pump housing 41, which is fixed in the inner cavity of the housing 10. It also includes a drive gear 42 and a driven gear 43. The drive gear 42 and the driven gear 43 are meshed with each other in the pump chamber 40 of the pump housing 41. The drive gear 42 and the driven gear 43 divide the pump chamber 40 into a first chamber 401 and a second chamber 402. During operation, one of the first chamber 401 and the second chamber 402 serves as a low-pressure chamber, and the other is a high-pressure chamber. The low-pressure chamber draws lubricating oil from inside the gearbox, and the high-pressure chamber pumps the oil to the oil injection assembly 3, thereby achieving lubrication at the meshing position of the worm gear 1 and the worm wheel 2.

[0036] Furthermore, the transmission component 5 includes a driving bevel gear 51 and a driven bevel gear 52. The driving bevel gear 51 is fixedly mounted on the worm gear 1, and the driven bevel gear 52 is fixedly mounted on the driving gear 42. The driving bevel gear 51 and the driven bevel gear 52 mesh with each other.

[0037] With the above configuration, when the rotation direction of the worm gear 1 changes, the rotation direction of the driving gear 42 and the driven gear 43 inside the pump housing 41 also changes. Therefore, the first chamber 401 and the second chamber 402 switch between the low-pressure chamber and the high-pressure chamber. At this time, it is necessary to change the oil inlet and outlet positions of the gear pump.

[0038] Therefore, in this embodiment, as Figure 7 As shown, the pump housing 41 is provided with a first oil inlet pipe 44 and a second oil outlet pipe 45 communicating with the first chamber 401, and the pump housing 41 is provided with a second oil inlet pipe 46 and a first oil outlet pipe 47 communicating with the second chamber 402. The first oil inlet pipe 44 and the second oil inlet pipe 46 both extend below the surface of the lubricating oil. The first oil inlet pipe 44 and the second oil inlet pipe 46 are respectively provided with a first check valve 48 and a second check valve 49.

[0039] It is worth noting that when the worm gear 1 rotates in the forward direction, the first chamber 401 acts as a low-pressure chamber and the second chamber 402 acts as a high-pressure chamber. The pressure in the first chamber 401 is less than the pressure inside the gearbox housing 10, so the first check valve 48 opens. The pressure in the second chamber 402 is greater than the pressure inside the gearbox housing 10, so the second check valve 49 closes. At this time, the lubricating oil inside the gearbox enters the first chamber 401 from the first oil inlet pipe 44 and then flows out from the first oil outlet pipe 47.

[0040] It is worth noting that, such as Figure 8 As shown, the first oil outlet pipe 47 is connected to the first fuel injector 31, and the second oil outlet pipe 45 is connected to the second fuel injector 32.

[0041] Since both the first fuel injector 31 and the second fuel injector 32 have hollow channels, in order to ensure that the fuel supply assembly 4 can pump oil smoothly, the second oil outlet pipe 45 closes and the first oil outlet pipe 47 opens when the worm gear 1 rotates in the forward direction.

[0042] In order to achieve the control of the opening and closing states of the first oil outlet pipe 47 and the second oil outlet pipe 45 as described above, in this embodiment, as follows: Figure 9 and Figure 10 As shown, the oil distribution assembly 6 includes an oil distribution pipe 61, an oil distribution chamber 611 is provided inside the oil distribution pipe 61, and a first oil outlet 631 and a second oil outlet 632 communicating with the oil distribution chamber 611 are provided on the side wall of the oil distribution pipe 61. An oil distribution valve 62 is also slidably connected inside the oil distribution chamber 611. The first oil outlet pipe 47 and the second oil outlet pipe 45 are connected to the oil distribution chamber 611. When the worm gear 1 rotates in the forward direction, as... Figure 8 As shown, the oil distribution valve 62 moves towards the second oil outlet 632 and closes the second oil outlet 632 and the second oil outlet pipe 45. At this time, the first oil outlet 631 and the first oil outlet pipe 47 open, thereby sending the lubricating oil to the first oil injector 31 and spraying it onto the first working surface 101. When the worm gear 1 rotates in the reverse direction, the first one-way valve 48 closes and the second one-way valve 49 opens. At this time, the lubricating oil enters the second chamber 402 through the second oil inlet pipe 46 and then flows to the first chamber 401. At this time, the lubricating oil pushes the oil distribution valve 62 towards the first oil outlet 631, thereby closing the first oil outlet 631 and the first oil outlet pipe 47. At this time, the second oil outlet pipe 45 is connected to the second oil outlet 632, thereby pumping the oil to the second oil injector 32 and spraying the oil onto the second working surface 102.

[0043] Furthermore, in order to selectively close the first oil outlet pipe 47 and the second oil outlet pipe 45, in this embodiment, as follows: Figure 10 As shown, the oil distribution pipe 61 is provided with a first buffer chamber 612 and a second buffer chamber 613 located on both sides of the oil distribution chamber 611. The first oil outlet pipe 47 is connected to the first buffer chamber 612, and the second oil outlet pipe 45 is connected to the second buffer chamber 613. The oil distribution pipe 61 is provided with a first through hole 614 connecting the oil distribution chamber 611 and the first buffer chamber 612, and a second through hole 615 connecting the oil distribution chamber 611 and the second buffer chamber 613. The oil distribution valve 62 is provided with a first sealing column 621 and a second sealing column 622 on its two side walls, respectively. When the oil distribution valve 62 moves toward the second oil outlet 632, the second sealing column 622 is inserted into the second through hole 615, thereby closing the second oil outlet pipe 45. When the oil distribution valve 62 moves toward the first oil outlet 631, the first sealing column 621 is inserted into the first through hole 614, thereby closing the first oil outlet pipe 47.

[0044] When the rotation direction of the worm gear 1 changes, in order to allow the lubricant in the gearbox to enter the pump chamber 40 of the pump housing 41, a support seat 100 is provided in the inner cavity of the housing 10, such as... Figure 11 As shown, the support 100 is provided with a first oil suction channel 1001 and a second oil suction channel 1002 extending below the lubricating oil surface. The first oil suction channel 1001 is connected to the first oil inlet pipe 44, and the second oil suction channel 1002 is connected to the second oil inlet pipe 46. The pump housing 41 is fixedly installed on the support 100.

[0045] With the above settings, when the worm gear 1 rotates in the forward direction, the first one-way valve 48 opens and the second one-way valve 49 closes. The lubricating oil in the gearbox enters the first chamber 401 through the first oil inlet pipe 44 and the first one-way valve 48, and then flows through the second chamber 402 and the first oil outlet pipe 47 into the first buffer chamber 612. At this time, the lubricating oil pushes the oil distribution valve 62 to move towards the second buffer chamber 613. The second sealing column 622 is inserted into the second through hole 615, separating the second buffer chamber 613 from the oil distribution chamber 611. At this time, the second oil outlet 632 is blocked by the oil distribution valve 62. At the same time, when the worm gear 1 rotates in the forward direction, the first chamber 401 generates negative pressure. Therefore, the second sealing column 622 of the oil distribution valve 62 can be inserted into the second through hole 615 through the second oil outlet pipe 45 and the second buffer chamber 613, thereby ensuring the stable operation of the oil supply assembly 4.

[0046] When the worm gear 1 rotates in the reverse direction, the first one-way valve 48 closes and the second one-way valve 49 opens. The lubricating oil enters the second chamber 402 through the second oil inlet pipe 46, and then flows through the first chamber 401 and the second oil outlet pipe 45 into the second buffer chamber 613. At this time, the push oil distribution valve 62 moves to the side of the first buffer chamber 612, and the first sealing column 621 of the oil distribution valve 62 is inserted into the first through hole 614, thereby closing the first oil outlet pipe 47. The lubricating oil enters the second oil nozzle 32 through the second oil outlet 632, thereby spraying onto the second working surface 102 to realize the switching of the lubrication position.

[0047] It is worth noting the necessity of the first buffer chamber 612 and the second buffer chamber 613. Since the rotation direction of the worm gear 1 changes instantaneously, the oil distribution valve 62 cannot move instantaneously at the moment the worm gear 1 changes direction. Taking the change of the worm gear 1 from a forward spiral to a reverse spiral as an example... Figure 8As shown, at this time, the first chamber 401 switches from a low-pressure chamber to a high-pressure chamber, and the second chamber 402 switches from a high-pressure chamber to a low-pressure chamber. During the reverse rotation of the worm gear 1, since the position of the oil distribution valve 62 cannot be moved instantaneously, the first buffer chamber 612 is connected to the oil distribution chamber 611 through the first through hole 614. At this time, the first buffer chamber 612 and the second oil inlet pipe 46 simultaneously return the lubricating oil to the second chamber 402. The lubricating oil in the first chamber 401 is supplied to the second buffer chamber 613 through the second oil outlet pipe 45, and pushes the oil distribution valve 62 to one side of the first buffer chamber 612, gradually changing the position of the oil distribution valve 62. During the position switching of the oil distribution valve 62, due to the presence of the first buffer chamber 612, the risk of air inside the gearbox entering the second chamber 402 through the first oil injector 31 is reduced, thereby ensuring the steady switching of the position of the oil distribution valve 62 and providing a safe environment for the normal operation of the oil supply assembly 4.

[0048] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A worm gear reducer, comprising a worm (1) and a worm wheel (2), characterized in that, The helical teeth (11) of the worm (1) mesh with the tooth groove (21) of the worm wheel (2) and form a first working surface (101) and a second working surface (102) in the axial direction of the worm (1). The first working surface (101) and the second working surface (102) are located on both sides of the helical teeth (11). The fuel injection assembly (3) includes a first fuel injector (31) and a second fuel injector (32). The nozzle of the first fuel injector (31) points to the first working surface (101), and the nozzle of the second fuel injector (32) points to the second working surface (102). Oil supply assembly (4) and transmission component (5). The oil supply assembly (4) is powered to the worm gear (1) through the transmission component (5). The oil supply assembly (4) draws lubricating oil from the gearbox and delivers it to the first oil injector (31) or the second oil injector (32). The oil distribution assembly (6) has an oil inlet end connected to the oil outlet end of the oil supply assembly (4). The oil distribution assembly (6) has two oil outlets and is connected to the first oil injector (31) and the second oil injector (32) respectively. When the worm gear (1) rotates in the forward direction, the first oil injector (31) opens and the second oil injector (32) closes. When the worm gear (1) rotates in the reverse direction, the first oil injector (31) closes and the second oil injector (32) opens.

2. The worm gear reducer according to claim 1, characterized in that, The oil supply assembly (4) includes a pump housing (41), a drive gear (42), and a driven gear (43). The drive gear (42) and the driven gear (43) mesh with each other and are disposed in the pump chamber (40) of the pump housing (41). The drive gear (42) and the driven gear (43) divide the pump chamber (40) into a first chamber (401) and a second chamber (402). The pump housing (41) is provided with a first oil inlet pipe (44) and a second oil outlet pipe (45) communicating with the first chamber (401). The pump housing (41) is also provided with a connection to the second chamber (402). 402) The second oil inlet pipe (46) and the first oil outlet pipe (47) are connected. The first oil outlet pipe (47) is connected to the first oil injector (31), and the second oil outlet pipe (45) is connected to the second oil injector (32). When the worm (1) rotates in the forward direction, the first oil inlet pipe (44) and the first oil outlet pipe (47) are opened, and the second oil inlet pipe (46) and the second oil outlet pipe (45) are closed. When the worm (1) rotates in the reverse direction, the first oil inlet pipe (44) and the first oil outlet pipe (47) are closed, and the second oil inlet pipe (46) and the second oil outlet pipe (45) are opened.

3. A worm gear reducer according to claim 2, characterized in that, Both the first oil inlet pipe (44) and the second oil inlet pipe (46) extend below the lubricating oil level in the gearbox. The first oil inlet pipe (44) and the second oil inlet pipe (46) are respectively equipped with a first check valve (48) and a second check valve (49). When the worm (1) rotates in the forward direction, the first check valve (48) opens and the second check valve (49) closes. When the worm (1) rotates in the reverse direction, the first check valve (48) closes and the second check valve (49) opens.

4. A worm gear reducer according to claim 3, characterized in that, Includes a housing (10), and a support seat (100) is provided in the inner cavity of the housing (10). The pump housing (41) is fixedly installed on the support seat (100). The support seat (100) is provided with a first oil suction channel (1001) and a second oil suction channel (1002) extending below the lubricating oil surface. The first oil suction channel (1001) is connected to the first oil inlet pipe (44), and the second oil suction channel (1002) is connected to the second oil inlet pipe (46).

5. A worm gear reducer according to claim 3, characterized in that, The transmission component (5) includes a driving bevel gear (51) and a driven bevel gear (52). The driving bevel gear (51) is fixedly mounted on the worm gear (1), and the driven bevel gear (52) is fixedly mounted on the driving gear (42). The driving bevel gear (51) and the driven bevel gear (52) mesh with each other.

6. A worm gear reducer according to claim 2 or 3, characterized in that, The oil distribution assembly (6) includes an oil distribution pipe (61) and an oil distribution valve (62); An oil distribution chamber (611) is provided inside the oil distribution pipe (61). A first oil outlet (631) and a second oil outlet (632) communicating with the oil distribution chamber (611) are provided on the side wall of the oil distribution pipe (61). The first oil outlet (631) is connected to the first fuel injector (31), and the second oil outlet (632) is connected to the second fuel injector (32). The oil distribution valve (62) is slidably installed in the oil distribution chamber (611) so that one of the first oil outlet (631) and the second oil outlet (632) can be opened and the other closed.

7. A worm gear reducer according to claim 6, characterized in that, The first oil outlet pipe (47) and the second oil outlet pipe (45) are connected to the oil distribution chamber (611) and placed on both sides of the oil distribution valve (62). When the worm (1) rotates in the forward direction, the oil distribution valve (62) moves to the side of the second oil outlet (632), disconnecting the second oil outlet (632) from the second oil outlet pipe (45) and connecting the first oil outlet (631) with the first oil outlet pipe (47). When the worm (1) rotates in the reverse direction, the oil distribution valve (62) moves to the side of the first oil outlet (631), connecting the second oil outlet (632) with the second oil outlet pipe (45) and disconnecting the first oil outlet (631) from the first oil outlet pipe (47).

8. A worm gear reducer according to claim 6, characterized in that, The oil separator (611) is provided with a first buffer chamber (612) and a second buffer chamber (613) on both sides. The first buffer chamber (612) is located on one side of the first oil outlet (631) and is connected to the oil separator (611) through the first through hole (614). The second buffer chamber (613) is located on one side of the second oil outlet (632) and is connected to the oil separator (611) through the second through hole (615). The oil separator valve (62) is provided with a first sealing column (621) and a second sealing column (622) on both end walls. When the worm gear (1) rotates in the forward direction, the second sealing column (622) is inserted into the second through hole (615) to close the second through hole (615). When the worm gear (1) rotates in the reverse direction, the first sealing column (621) is inserted into the first through hole (614) to close the first through hole (614).

9. A worm gear reducer according to claim 8, characterized in that, The first fuel injector (31) is installed on the fuel distribution pipe (61) and connected to the first fuel outlet (631), and the second fuel injector (32) is installed on the fuel distribution pipe (61) and connected to the second fuel outlet (632).

10. A worm gear reducer according to claim 9, characterized in that, It also includes a housing (10), an oil distribution pipe (61) is fixedly installed in the inner cavity of the housing (10), the extension direction of the oil distribution pipe (61) is consistent with the axial direction of the worm (1), and several first oil injectors (31) and second oil injectors (32) are provided and distributed along the axial direction of the worm (1).

Images