Gear box of driver

Abstract

The utility model discloses a driver gear box which comprises a turbine and an outer shell, the turbine is rotatably contained in the outer shell, the driver gear box is characterized by further comprising a thrust bearing, the thrust bearing is arranged on one side of the turbine in the axial direction, and the thrust bearing and the turbine are tightly matched with the outer shell in the axial direction, so that the thrust bearing is clamped between the turbine and the outer shell. According to the driver gear box, the number of the thrust bearings can be reduced, noise pollution is further reduced, the assembly precision is improved, the assembly efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gearboxes, in particular to a driver gearbox. BACKGROUND

[0002] The performance requirements of transmission components are increasingly stringent in the current industry, especially in the fields of consumer electronics, smart home, etc. Users have improved sensitivity to equipment noise, and the manufacturing industry has an urgent need to reduce costs and increase efficiency. Traditional mechanical structure design is difficult to meet the needs of users and manufacturers due to structural redundancy and rigid regulation. The design defects of thrust bearings, which are the core modules of power transmission represented by gearboxes, have become a key bottleneck restricting product performance and market competitiveness.

[0003] As a core component that bears axial load and ensures transmission stability, the performance of the thrust bearing directly affects the reliability, noise level and service life of the equipment. However, although the traditional thrust bearing has good bearing capacity and use stability, its inherent defects are increasingly prominent in high-end application scenarios. For example, the uneven stress phenomenon may occur on the friction surface of the thrust bearing during operation due to factors such as assembly error, material wear or thermal deformation, which produces high noise that is not conducive to use in scenarios with high demand for silence. In addition, the manufacturing cost of the thrust bearing and its matching installation structure is relatively high, which is not conducive to mass production and assembly into power transmission core modules represented by gearboxes for use. SUMMARY

[0004] One object of the present application is to provide a driver gearbox that can improve the contact performance of the components of the gearbox and further reduce noise pollution.

[0005] Another object of the present application is to provide a driver gearbox that can improve assembly accuracy and product quality.

[0006] Another object of the present application is to provide a driver gearbox that can reduce production costs, increase assembly efficiency and increase economic benefits.

[0007] To achieve the above objects, the technical solution adopted by the present application is as follows: a driver gearbox, comprising a turbine and an outer shell, the turbine being rotatably accommodated in the outer shell, further comprising a thrust bearing, the thrust bearing being arranged on one side of the turbine along the axial direction, the thrust bearing and the turbine being tightly fitted with the outer shell along the axial direction, so that the thrust bearing is clamped between the turbine and the outer shell.

[0008] In some embodiments, the outer housing is provided with an inner end face near one side of the thrust bearing, the inner end face is provided with a protrusion protruding towards the thrust bearing, the protrusion is adapted to press the turbine and the thrust bearing in the axial direction, so that the thrust bearing is clamped between the end face of the turbine and the outer housing.

[0009] In some embodiments, the outer housing is provided with a main transmission hole in the axial direction, the main transmission hole allows the turbine to be rotatably arranged in the outer housing; the protrusion comprises a plurality of protrusions, each of the protrusions is uniformly distributed on the inner end face of the outer periphery of the main transmission hole in the circumferential direction, and each of the protrusions extends in the radial direction.

[0010] In some embodiments, the cross section of the protrusion gradually decreases in the circumferential width from one end connected to the inner end face to the other end away from the inner end face, and the outer contour of the cross section of the protrusion is arc-shaped.

[0011] In some embodiments, the outer housing and the protrusion are integrally formed or are in a split structure.

[0012] In some embodiments, the turbine sequentially comprises a first shaft neck portion, a filling portion, an outer tooth portion and a second shaft neck portion in the axial direction; the outer tooth portion is adapted to be engaged with a driving gear; the thrust bearing is sleeved on the second shaft neck portion and is clamped between the outer tooth portion and the outer housing; the filling portion allows the outer tooth portion to be located in the middle section of the turbine as a whole in the axial direction.

[0013] In some embodiments, the gear box further comprises a gasket, the gasket is sleeved on the first shaft neck portion and is located between the outer housing and the filling portion; the outer periphery of the gasket is provided with an embedding portion, the embedding portion extends towards the filling portion to be adapted to be clamped with the filling portion, so that the gasket and the turbine are adapted to rotate synchronously.

[0014] In some embodiments, the gear box further comprises a first shaft sleeve and a second shaft sleeve, the first shaft sleeve is sleeved on the first shaft neck portion, so that the first shaft sleeve is located between the outer housing and the turbine; the second shaft sleeve is sleeved on the second shaft neck portion, so that the second shaft sleeve is located between the thrust bearing and the outer housing.

[0015] In some embodiments, the end surface of the first shaft sleeve axially abutting the outer housing is a first inner contact surface, and the end surface of the second shaft sleeve axially abutting the outer housing is a second inner contact surface; in a natural state in which the first shaft sleeve, the gasket, the turbine, the thrust bearing and the second shaft sleeve are sequentially arranged along the axial direction, the axial distance between the first inner contact surface and the second inner contact surface is h1, and in a natural state of the outer housing, the axial distance of the internal accommodating space is h2, wherein h1≥h2, and the first shaft sleeve, the gasket, the turbine, the thrust bearing and the second shaft sleeve are adapted to be clamped inside the outer housing.

[0016] In some embodiments, the outer housing comprises a first shell and a second shell arranged correspondingly, and the first shell and the second shell are adapted to be mutually buckled along the axial direction to form an accommodating cavity for accommodating the turbine and the thrust bearing.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] (1) By extending the protruding pieces radially and circumferentially on the inner end surface of the outer housing, the contact area between the outer housing and the first shaft sleeve is increased, thereby increasing the contact performance of the components in the accommodating cavity, increasing the pre-tightening force of the thrust bearing, and further reducing noise pollution during use.

[0019] (2) By increasing the pre-tightening force between the components, the number of thrust bearings used can be reduced, further reducing production costs.

[0020] (3) By providing the gasket with the fitting part, the gasket and the turbine are adapted to rotate synchronously, thereby reducing friction and absorbing impact, and the reliability and service life of the entire gear box system can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of a drive gear box of some embodiments of the application.

[0022] Figure 2 is an exploded view of a drive gear box of some embodiments of the application.

[0023] Figure 3 is a structural schematic diagram of a first shaft sleeve of some embodiments of the application.

[0024] Figure 4 is a structural schematic diagram of a first shell of some embodiments of the application.

[0025] Figure 5 is Figure 4 is a local enlarged view of A in FIG.

[0026] Figure 6 is a structural schematic diagram of a turbine of some embodiments of the present application.

[0027] Figure 7 is a side sectional view of a driver gear box of some embodiments of the present application.

[0028] Figure 8 is a side sectional view of a driver gear box of some embodiments of the present application.

[0029] Figure 9 is Figure 8 is a local enlarged view at B in FIG.

[0030] Figure 10 is a structural schematic diagram of a second shell of some embodiments of the present application.

[0031] Figure 11 is a structural schematic diagram of a gasket of some embodiments of the present application.

[0032] In the figure: 1, gear box; 10, outer shell; 11, first shell; 111, accommodating cavity; 112, inner end face; 113, protruding part; 1131, protruding piece; 114, main transmission hole; 115, auxiliary transmission hole; 116, first fixing hole; 117, limiting part; 118, limiting column; 12, second shell; 122, main through hole; 123, auxiliary through hole; 124, second fixing hole; 125, positioning part; 126, positioning piece; 127, limiting groove; 20, turbine; 21, inner tooth part; 22, outer tooth part; 23, first journal part; 24, second journal part; 25, filling part; 30, lead screw; 31, transmission rod; 41, first shaft sleeve; 411, first inner contact face; 42, second shaft sleeve; 421, second inner contact face; 50, thrust bearing; 60, connecting part; 61, connecting groove; 71, damping piece; 72, fastener; 73, gasket; 731, fitting part; 732, crack stopping groove; 74, driving gear. DETAILED DESCRIPTION

[0033] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments, without conflict.

[0034] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0035] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0037] To achieve the above objectives, such as Figures 1-11 As shown, the technical solution adopted in this application is as follows: a drive gearbox 1 includes a turbine 20 and a housing 10. The turbine 20 is rotatably housed within the housing 10. It also includes a thrust bearing 50, which is disposed on one axial side of the turbine 20. The thrust bearing 50 and the turbine 20 are tightly fitted together axially with the housing 10, such that the thrust bearing 50 is clamped between the turbine 20 and the housing 10. By tightly fitting the thrust bearing 50 and the turbine 20, the contact performance of each component is further improved. The number of thrust bearings 50 used can also be reduced, with only one thrust bearing 50 placed between the turbine 20 and the housing 10, thereby reducing noise pollution during use, further reducing production costs, and increasing production efficiency.

[0038] Further, the outer housing 10 comprises a first housing part 11 and a second housing part 12 arranged correspondingly, the first housing part 11 is located away from the thrust bearing 50, and the second housing part 12 is located close to the thrust bearing 50, the first housing part 11 and the second housing part 12 are adapted to be buckled to each other in the axial direction to form a containing cavity 111 for accommodating the turbine 20 and the thrust bearing 50. By buckling the first housing part 11 and the second housing part 12 in the axial direction, the assembly difficulty and the wear of the internal components can be reduced, and the assembly accuracy can be improved. By buckling the first housing part 11 and the second housing part 12 in the axial direction along the screw rod 30, only the first housing part 11 and the second housing part 12 need to be separated in the axial direction during installation and disassembly, without the need for complex tools and processing procedures, greatly reducing the difficulty of installation and maintenance.

[0039] In at least one embodiment, the first housing part 11 and the second housing part 12 are adapted to be buckled to each other in the radial direction, avoiding local stress concentration phenomenon, and enhancing the overall strength and rigidity of the gearbox 1.

[0040] In at least another embodiment, the outer housing 10 can also be made by three-dimensional printing, further increasing the structural strength of the outer housing 10, and also improving the sealing performance of the gearbox 1.

[0041] On the other hand, the containing cavity 111 formed by the first housing part 11 and the second housing part 12 compactly accommodates the turbine 20 and the thrust bearing 50, which reduces the occupied space and is beneficial to further improve the transmission efficiency.

[0042] In some embodiments, the outer housing 10 is provided with an inner end face 112 close to the thrust bearing 50, the inner end face 112 is provided with a protruding portion 113 protruding towards the thrust bearing 50, the protruding portion 113 is adapted to press the turbine 20 and the thrust bearing 50 in the axial direction, so that the thrust bearing 50 is clamped between the end face of the turbine 20 and the outer housing 10. By providing the protruding portion 113 on the outer housing 10, the contact performance of the components in the containing cavity 111 is increased, the pre-tightening force of the thrust bearing 50 is increased, and the noise pollution generated during use is further reduced.

[0043] In some embodiments, as Figure 4 、 Figure 5 、 Figure 9 and Figure 10As shown, the outer housing 10 is provided with a main transmission hole 114 along the axial direction, and the main transmission hole 114 is configured to allow the turbine 20 to be rotatably arranged in the outer housing 10. The protruding part 113 includes a plurality of protruding pieces 1131, each of which is arranged on the inner end surface 112 of the outer periphery of the main transmission hole 114 in a circumferential direction and extends in a radial direction. The plurality of protruding pieces 1131 arranged in the circumferential direction and extending in the radial direction can further clamp the components in the clamping accommodation cavity 111, thereby saving the space occupied by the gear box 1. In other words, the protruding pieces 1131 arranged in the circumferential direction can also improve the carrying capacity of the overall structure, so that the overall structure can withstand greater axial force and torque. It is worth mentioning that, after the thrust bearing 50 in the clamping accommodation cavity 111, the axial jumping phenomenon is reduced, thereby improving the operation stability of the entire gear box 1 system, reducing the noise and component wear caused by vibration. Further, the clamped thrust bearing 50 can better maintain the centration, ensure the accuracy and smoothness of power transmission, and reduce additional stress and wear caused by poor centration. Moreover, the clamped thrust bearing 50 can more effectively withstand the axial force, improve its carrying capacity, thereby having good use performance under heavier load and more complex working conditions, and further prolonging the service life.

[0044] In some embodiments, the second housing 12 is provided with a main through hole 122 corresponding to the main transmission hole 114 along the axial direction, so that the lead screw 30 passes through the main transmission hole 114 and the main through hole 122 along the axial direction, further improving the assembly accuracy of the lead screw 30.

[0045] In one embodiment, the cross section of the protruding piece 1131 gradually decreases in circumferential width from one end connected to the inner end surface 112 to the other end away from the inner end surface 112, and the outer contour of the cross section of the protruding piece 1131 is arc-shaped. Further, since the width of the protruding piece 1131 away from the inner end surface 112 is smaller, the protruding piece 1131 can deform to a certain extent when clamping the components in the clamping accommodation cavity 111, so as to achieve a close assembly relationship and reduce the wear and damage during assembly and use. On the other hand, since the width of the protruding piece 1131 close to the inner end surface 112 is larger, the structural strength of the protruding piece 1131 is increased, which is beneficial to reduce the risk of fracture of the protruding piece 1131.

[0046] In some embodiments, the protruding piece 1131 has an arc-shaped, or semi-circular, or trapezoidal, or triangular cross-section in the axial direction. Among them, the arc-shaped cross-section can realize smooth transition, reduce stress concentration phenomenon, and improve the fatigue strength of the structure; the semi-circular cross-section can provide a larger contact area to enhance the clamping force and improve the stability of the connection; the trapezoidal cross-section of the protruding piece 1131 has good stability in the axial and radial directions, which can effectively prevent the displacement phenomenon of the thrust bearing 50 in the axial direction; the triangular cross-section of the protruding piece 1131 can improve the compactness of the structure, further enhancing the clamping function in limited space.

[0047] In at least one embodiment, when the first shell 11 and the second shell 12 are buckled in the axial direction, the protruding part 113 provided on the first shell 11 is beneficial to increase the pre-tightening force of the thrust bearing 50 and reduce the internal clearance. It is worth mentioning that the contact performance of the components in the accommodating cavity 111 is further improved by the protruding part 113, which can reduce the number of thrust bearings 50, and only one thrust bearing 50 is arranged between the turbine 20 and the second shell 12, thereby reducing the noise pollution phenomenon in the use process, further reducing the production cost, and increasing the production efficiency. On the other hand, since the first shell 11 and the second shell 12 are buckled in the axial direction, it is beneficial to reduce the wear phenomenon of the protruding part 113.

[0048] In at least another embodiment, when the first shell 11 and the second shell 12 are buckled in the radial direction, it is beneficial to reduce the assembly difficulty and improve the connection tightness between the components and the protruding part 113.

[0049] In some embodiments, the outer shell 10 and the protruding part 113 are integrally formed or a split structure. Through this structure, it is beneficial to improve the connection strength of the outer shell 10 and the protruding part 113, and further increase the use stability of the gear box 1.

[0050] In some embodiments, as Figure 2As shown, the turbine 20 includes, in sequence along the axial direction, a first shaft neck portion 23, a filling portion 25, an outer tooth portion 22, and a second shaft neck portion 24; the outer tooth portion 22 is adapted to intermesh with the driving gear 74; the thrust bearing 50 is sleeved on the second shaft neck portion 24 and clamped between the outer tooth portion 22 and the outer housing 10; the filling portion 25 makes the outer tooth portion 22 located in the middle of the turbine 20 as a whole along the axial direction. It is worth mentioning that, since the thrust bearing 50 is sleeved on the first shaft neck portion 23 of the turbine 20 and clamped between the end surface of the outer tooth portion 22 of the turbine 20 and the second housing 12, such a structure provides stable axial support for the turbine 20. Therefore, during rotation of the turbine 20, axial displacement of the turbine 20 can be effectively limited, further improving the meshing precision of the turbine 20 and the lead screw 30, so as to improve the stability during transmission. It can be understood that the stable support provided by the turbine 20 for the thrust bearing 50 is conducive to reducing the vibration and noise generated by the gear box 1 during use. Further, the thrust bearing 50 can absorb and disperse the axial force, reduce the vibration phenomenon caused by the unbalance of the force, thereby reducing the generated noise, and thus improving the smoothness of the gear box 1 during operation. It can be understood that the thrust bearing 50 can reduce friction and reduce wear between components, further prolonging the service life of the thrust bearing 50 and related mechanical components.

[0051] Further, by providing the filling portion 25, the outer tooth portion 22 is located in the middle of the entire turbine 20, so that the driving components of the gear box 1 and the outer housing 10 can use the existing structure, thereby reducing the production cost.

[0052] In some embodiments, as Figure 2 With Figure 6 As shown, the gear box 1 further includes a lead screw 30, and the turbine 20 further includes an inner tooth portion 21 inside, which is used to intermesh with the lead screw 30, thereby improving the use stability of the gear box 1 system and further reducing the generation of noise.

[0053] In some embodiments, as Figure 2 With Figure 11As shown, the gear box 1 further comprises a gasket 73, which is sleeved on the first shaft neck portion 23 and located between the outer shell 10 and the filling portion 25. The gasket 73 is provided with an embedded portion 731 on the outer periphery, which extends towards the filling portion 25 and is adapted to be clamped with the filling portion 25, so that the gasket 73 and the turbine 20 are adapted to rotate synchronously. It can be understood that the gasket 73 can improve the reliability and service life of the entire gear box 1 system, reduce the failure rate and maintenance cost by reducing friction and absorbing impact. The embedded portion 731 is clamped with the filling portion 25, so that the gasket 73 and the turbine 20 are adapted to rotate synchronously, which can significantly improve the operation stability, transmission efficiency and service life of the gear box 1 system, and improve the assembly and maintenance performance, space utilization and safety, further improve the reliability of the gear box 1, and also reduce the wear phenomenon of the turbine 20 during use.

[0054] Further, the gasket 73 further comprises a crack stopping groove 732 provided on both sides of the embedded portion 731, which is beneficial to reduce the tearing phenomenon of the gasket 73 caused by material stress concentration, and ensure the integrity and shape accuracy of the gasket 73.

[0055] In some embodiments, the gasket 73 has a smooth surface. Since the smooth surface can reduce the friction coefficient between the gasket 73 and the contacting components, reduce energy loss and heat generation, and also reduce wear, the service life of the gasket 73 and related components can be prolonged.

[0056] In at least some embodiments, the gasket 73 is made of nylon material. The nylon material has good wear resistance and self-lubricating property, which can reduce the friction between mechanical components and further prolong the service life of the equipment.

[0057] In some embodiments, as shown, Figure 2 The gear box 1 further comprises a first shaft sleeve 41 and a second shaft sleeve 42. The first shaft sleeve 41 is sleeved on the first shaft neck portion 23, so that the first shaft sleeve 41 is located between the outer shell 10 and the turbine 20. The second shaft sleeve 42 is sleeved on the second shaft neck portion 24, so that the second shaft sleeve 42 is located between the thrust bearing 50 and the outer shell 10. It can be understood that the first shaft sleeve 41 located between the first shell 11 and the turbine 20 provides a smooth surface for the rotatable turbine 20, so as to reduce the friction coefficient between the turbine 20 and the first shell 11, further reduce energy loss and heat generation during use, protect the turbine 20 from damage, and prolong the service life of the turbine 20.

[0058] The first shaft sleeve 41 is provided in a stepped structure to match the outer contour of the filling portion 25 and the first shaft neck portion 23, so as to further improve the protection performance of the internal components.

[0059] It can be understood that the first shaft sleeve 41 and the second shaft sleeve 42 also have a limiting structure, so that the first shaft sleeve 41 and the second shaft sleeve 42 are fixed with the first shell 11 and the second shell 12 respectively, which is conducive to avoiding the first shaft sleeve 41 and the second shaft sleeve 42 rotating together with the turbine 20.

[0060] Further, the second shaft sleeve 42 arranged between the second shell 12 and the thrust bearing 50 can reduce the friction between the thrust bearing 50 and the shell, reduce the wear rate, and prolong the service life of the thrust bearing 50. Therefore, the first shaft sleeve 41 and the second shaft sleeve 42 further improve the reliability and service life of the entire gear box 1 system by reducing the friction, wear and impact phenomenon generated between the two shells and the components, so as to reduce the failure rate and maintenance cost.

[0061] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 8 , the end surface of the first shaft sleeve 41 axially abutting the first shell 11 is a first inner contact surface 411, and the end surface of the second shaft sleeve 42 axially abutting the second shell 12 is a second inner contact surface 421; in the natural state of the first shaft sleeve 41, the gasket 73, the turbine 20, the thrust bearing 50 and the second shaft sleeve 42 arranged in sequence along the axial direction, the axial distance between the first inner contact surface 411 and the second inner contact surface 421 is h1, and in the natural state of the first shell 11 and the second shell 12 being buckled, the axial distance of the accommodating cavity 111 is h2, wherein h1≥h2, which is suitable for clamping the first shaft sleeve 41, the gasket 73, the turbine 20, the thrust bearing 50 and the second shaft sleeve 42 between the first shell 11 and the second shell 12.

[0062] It can be understood that the natural state of the first shaft sleeve 41, the gasket 73, the turbine 20, the thrust bearing 50 and the second shaft sleeve 42 arranged in sequence along the axial direction is that the components are assembled in the mounting relationship in the gear box 1, but are in a state of not being installed in the outer shell 10 and not being clamped by the outer shell 10, and the overall axial distance at this time is h1; the axial distance h2 of the accommodating cavity 111 refers to the distance between the end surface of the protruding piece 1131 towards the second shell 12 and the end surface of the second shell 12 axially abutting the second shaft sleeve 42. When the first shaft sleeve 41, the gasket 73, the turbine 20, the thrust bearing 50 and the second shaft sleeve 42 are sequentially assembled along the axial direction and clamped in the accommodating cavity 111 between the first shell 11 and the second shell 12, due to h1≥h2, a tight assembly relationship is generated, which is conducive to improving the assembly tightness between the components, and does not require additional connecting pieces and slotting treatment, and has a simple structure and good impact resistance.

[0063] In some embodiments, as shown in Figure 4 andFigure 10 As shown, the first shell 11 is provided with a limiting column 118 protruding towards the second shell 12, and the second shell 12 is provided with a limiting slot 127 recessed towards the first shell 11, the limiting column 118 is adapted to be inserted into the limiting slot 127 to keep the relative position of the first shell 11 and the second shell 12. By the limiting column 118 and the limiting slot 127 which can be axially matched with each other, the assembly precision is improved, and the positioning convenience between the first shell 11 and the second shell 12 is improved during installation, and the installation and disassembly process is easy.

[0064] In some embodiments, referring to Figure 2 With Figure 8 As shown, the gear box 1 further comprises a driving gear 74 set, the driving gear 74 set comprises at least one driving gear 74, and the driving gear 74 is in meshing with the external tooth part 22 of the turbine 20. It can be understood that the gear box 1 comprises the driving gear 74 set, and the driving gear 74 is in meshing with the external tooth part 22 of the turbine 20, which can significantly improve the efficiency, load capacity, stability and service life of the transmission system, while optimizing the space utilization and reducing the cost. As shown Figure 7 As shown, the first shell 11 is provided with a secondary transmission hole 115, and the second shell 12 is provided with a secondary through hole 123, so that the shaft of the driving gear 74 or the transmission rod 31 inside the driving gear 74 can pass through the secondary transmission hole 115 and the secondary through hole 123 in the axial direction, thereby improving the assembly precision.

[0065] In some embodiments, as shown Figure 8 As shown, the gear box 1 comprises a damping member 71 installed at the opposite ends of the outer shell 10 along the axial direction of the lead screw 30. It can be understood that the damping member 71 can absorb and buffer the vibration energy generated during the operation of the gear box 1, reduce the influence of vibration on the internal parts and external connecting components of the gear box 1, and reduce the noise pollution, thereby further improving the stability and reliability of the gear box 1.

[0066] In some embodiments, as shown Figure 1 As shown Figure 2 As shown, the gear box 1 further comprises a plurality of fasteners 72, the first shell 11 is provided with a plurality of first fixing holes 116 in the axial direction, and the second shell 12 is provided with a plurality of second fixing holes 124 corresponding to the first fixing holes 116 in the axial direction, so that the fasteners 72 pass through the first fixing holes 116 and the second fixing holes 124 to axially fasten and install the first shell 11 and the second shell 12. By providing the fasteners 72, the structural stability, load capacity, sealing performance and service life of the gear box 1 are improved, the assembly process is simplified, the maintenance and repair convenience is improved, and the safety and reliability of the gear box 1 are enhanced.

[0067] In at least one embodiment, the first fixing hole 116 and the second fixing hole 124 are through holes, and the fastener 72 is a pin. This structure is beneficial to improve the convenience during assembly and disassembly, and further reduces the risk of stress concentration.

[0068] In another at least one embodiment, one of the first fixing hole 116 and the second fixing hole 124 is a through hole, and the other is a threaded hole, and the fastener 72 is a screw. Since the cooperation between the threaded hole and the screw can provide higher connection strength, it ensures the tightness of the connection between the first shell 11 and the second shell 12, and further improves the structural stability of the gear box 1. This structure is beneficial to improve the convenience during assembly and disassembly, and the connection strength.

[0069] In some embodiments, it can be known from Figure 1 、 Figure 4 and Figure 10 that the first shell 11 is provided with a limiting portion 117 on the side away from the lead screw 30 in the vertical direction, the second shell 12 is provided with a positioning portion 125 on the side away from the lead screw 30 in the vertical direction, and the positioning portion 125 is outwardly provided with a positioning piece 126; the gear box 1 further includes a connecting portion 60, and the side wall of the connecting portion 60 is provided with a connecting groove 61; when the first shell 11 and the second shell 12 are mutually buckled, the limiting portion 117 and the positioning portion 125 are also mutually attached or close, the connecting portion 60 covers the limiting portion 117 and the positioning portion 125, and the positioning piece 126 extends to the connecting groove 61, so that the first shell 11 and the second shell 12 are buckled and installed, and further improve the assembly stability and assembly precision.

[0070] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A drive gear box comprising a turbine and an outer housing, the turbine being rotatably housed within the outer housing, characterised in that, The gear box further comprises a single thrust bearing arranged on one axial side of the turbine, and the thrust bearing and the turbine are tightly fitted with the outer housing in the axial direction, so that the thrust bearing is clamped between the turbine and the outer housing.

2. The gear box of claim 1, wherein, The outer housing is provided with an inner end face on the side close to the thrust bearing, and the inner end face is provided with a protrusion protruding towards the thrust bearing, and the protrusion is adapted to press the turbine and the thrust bearing in the axial direction, so that the thrust bearing is clamped between the end face of the turbine and the outer housing.

3. The gear box of claim 2, wherein, The outer housing is provided with a main transmission hole in the axial direction, and the main transmission hole enables the turbine to be rotatably arranged in the outer housing; the protrusion comprises a plurality of protrusions, and each of the protrusions is uniformly arranged on the inner end face of the outer periphery of the main transmission hole in the circumferential direction, and each of the protrusions extends in the radial direction.

4. The gear box of claim 3, wherein, The cross section of the protrusion gradually decreases in the circumferential width from one end connected with the inner end face to the other end away from the inner end face, and the outer contour of the cross section of the protrusion is arc-shaped.

5. The gear box of claim 2, wherein, The outer housing and the protrusion are integrally formed or are in a split structure.

6. A gearbox as claimed in any one of claims 1 to 5, wherein, The turbine sequentially comprises a first shaft neck portion, a filling portion, an outer tooth portion and a second shaft neck portion in the axial direction; the outer tooth portion is adapted to be engaged with a driving gear; the thrust bearing sleeve is arranged on the second shaft neck portion and is clamped between the outer tooth portion and the outer housing; and the filling portion enables the outer tooth portion to be located in the middle of the turbine as a whole in the axial direction.

7. The gear box of claim 6, wherein, The gear box further comprises a gasket, and the gasket is sleeved on the first shaft neck portion and is located between the outer housing and the filling portion; the outer periphery of the gasket is provided with an embedding portion, and the embedding portion extends towards the filling portion to be adapted to be clamped with the filling portion, so that the gasket and the turbine are adapted to rotate synchronously.

8. The gear box of claim 7, wherein, The gear box further comprises a first shaft sleeve and a second shaft sleeve, the first shaft sleeve is sleeved on the first shaft neck portion, so that the first shaft sleeve is located between the outer housing and the turbine; and the second shaft sleeve is sleeved on the second shaft neck portion, so that the second shaft sleeve is located between the thrust bearing and the outer housing.

9. The gear box of claim 8, wherein, The end face of the first shaft sleeve axially abutting against the outer housing is a first inner tangent face, and the end face of the second shaft sleeve axially abutting against the outer housing is a second inner tangent face; in the natural state of the first shaft sleeve, the gasket, the turbine, the thrust bearing and the second shaft sleeve being sequentially arranged in the axial direction, the axial distance between the first inner tangent face and the second inner tangent face is h1, and in the natural state of the outer housing, the axial distance of the internal accommodating space is h2, wherein h1≥h2, so as to clamp the first shaft sleeve, the gasket, the turbine, the thrust bearing and the second shaft sleeve inside the outer housing.

10. A gearbox as claimed in any one of claims 1 to 5, wherein, The outer housing comprises a first housing and a second housing arranged correspondingly, and the first housing and the second housing are adapted to be mutually buckled in the axial direction to form an accommodating cavity for accommodating the turbine and the thrust bearing.

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